HomeMy WebLinkAbout03 ConcretePark Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 1
SECTION 033000 - CAST-IN-PLACE CONCRETE
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1.Cast-in-place concrete, including concrete materials, mixture design, placement
procedures, and finishes.
1.3 DEFINITIONS
A. Cementitious Materials: Portland cement alone or in combination with one or more of
the following: blended hydraulic cement, slag cement, other pozzolans, and silica fume;
materials subject to compliance with requirements.
B. Water/Cement Ratio (w/cm): The ratio by weight of water to cementitious materials.
1.4 ACTION SUBMITTALS
A. Product Data: For each of the following.
1. Portland cement.
2. Slag cement.
3. Blended hydraulic cement.
4. Silica fume.
5. Performance-based hydraulic cement
6. Aggregates.
7. Admixtures:
a. Include limitations of use, including restrictions on cementitious materials,
supplementary cementitious materials, air entrainment, aggregates,
temperature at time of concrete placement, relative humidity at time of
concrete placement, curing conditions, and use of other admixtures.
8. Fiber reinforcement.
9. Vapor retarders.
10. Liquid floor treatments.
11. Curing materials.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 2
a. Include documentation from color pigment manufacturer, indicating that
proposed methods of curing are recommended by color pigment
manufacturer.
12. Joint fillers.
13. Repair materials.
B. Sustainable Design Submittals:
1. Product Data: For recycled content, indicating postconsumer and preconsumer
recycled content and cost.
2. Product Certificates: For indigenous materials, indicating location of material
manufacturer and point of extraction, harvest, or recovery for each raw material.
Include distance to Project, means of transportation, and cost for each indigenous
material.
3. Environmental Product Declaration: For each product.
4. Environmental Product Declaration: For each product.
5. Third-Party Certifications: For each product.
6. Laboratory Test Reports: For liquid floor treatments and curing and sealing
compounds, indicating compliance with requirements for low-emitting materials.
C. Design Mixtures: For each concrete mixture, include the following:
1. Mixture identification.
2. Minimum 28-day compressive strength.
3. Durability exposure class.
4. Maximum w/cm.
5. Calculated equilibrium unit weight, for lightweight concrete.
6. Slump limit.
7. Air content.
8. Nominal maximum aggregate size.
9. Steel-fiber reinforcement content.
10. Synthetic micro-fiber content.
11. Intended placement method.
12. Submit alternate design mixtures when characteristics of materials, Project
conditions, weather, test results, or other circumstances warrant adjustments.
D. Shop Drawings:
1. Construction Joint Layout: Indicate proposed construction joints required to
construct the structure.
a. Location of construction joints is subject to approval of the Architect.
E. Concrete Schedule: For each location of each Class of concrete indicated in "Concrete
Mixtures" Article, including the following:
1. Concrete Class designation.
2. Location within Project.
3. Exposure Class designation.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 3
4. Formed Surface Finish designation and final finish.
5. Final finish for floors.
6. Curing process.
7. Floor treatment if any.
1.5 INFORMATIONAL SUBMITTALS
A. Qualification Data: For the following:
1. Installer: Include copies of applicable ACI certificates.
2. Ready-mixed concrete manufacturer.
3. Testing agency: Include copies of applicable ACI certificates.
B. Material Certificates: For each of the following, signed by manufacturers:
1. Cementitious materials.
2. Admixtures.
3. Fiber reinforcement.
4. Curing compounds.
5. Floor and slab treatments.
6. Bonding agents.
7. Adhesives.
8. Vapor retarders.
9. Semirigid joint filler.
10. Joint-filler strips.
C. Material Test Reports: For the following, from a qualified testing agency:
1. Portland cement.
2. Slag cement.
3. Blended hydraulic cement.
4. Silica fume.
5. Performance-based hydraulic cement.
6. Aggregates.
7. Admixtures:
a. Permeability-Reducing Admixture: Include independent test reports,
indicating compliance with specified requirements, including dosage rate
used in test.
D. Research Reports:
1. For concrete admixtures in accordance with ICC's Acceptance Criteria AC198.
2. For sheet vapor retarder/termite barrier, showing compliance with ICC AC380.
E. Preconstruction Test Reports: For each mix design.
F. Field quality-control reports.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 4
1.6 QUALITY ASSURANCE
A. Installer Qualifications: A qualified installer who employs Project personnel qualified
as an ACI-certified Flatwork Technician and Finisher and a supervisor who is a
certified ACI Flatwork Concrete Finisher/Technician or an ACI Concrete Flatwork.
1. Post-Installed Concrete Anchors Installers: ACI-certified Adhesive Anchor
Installer.
B. Ready-Mixed Concrete Manufacturer Qualifications: A firm experienced in
manufacturing ready-mixed concrete products and that complies with
ASTM C94/C94M requirements for production facilities and equipment.
1. Manufacturer certified in accordance with NRMCA's "Certification of Ready
Mixed Concrete Production Facilities."
C. Laboratory Testing Agency Qualifications: A testing agency qualified in accordance
with ASTM C1077 and ASTM E329 for testing indicated and employing an
ACI-certified Concrete Quality Control Technical Manager.
1. Personnel performing laboratory tests shall be an ACI-certified Concrete
Strength Testing Technician and Concrete Laboratory Testing Technician,
Grade I. Testing agency laboratory supervisor shall be an ACI-certified Concrete
Laboratory Testing Technician, Grade II.
D. Field Quality Control Testing Agency Qualifications: An independent
agency, acceptable to authorities having jurisdiction, qualified in accordance with
ASTM C1077 and ASTM E329 for testing indicated.
1.7 PRECONSTRUCTION TESTING
A. Preconstruction Testing Service: Engage a qualified testing agency to perform
preconstruction testing on each concrete mixture.
1. Include the following information in each test report:
a. Admixture dosage rates.
b. Slump.
c. Air content.
d. Seven-day compressive strength.
e.28-day compressive strength.
1.8 DELIVERY, STORAGE, AND HANDLING
A. Comply with ASTM C94/C94M and ACI 301.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 5
1.9 FIELD CONDITIONS
A. Cold-Weather Placement: Comply with ACI 301 and ACI 306.1 and as follows.
1. Protect concrete work from physical damage or reduced strength that could be
caused by frost, freezing actions, or low temperatures.
2. When average high and low temperature is expected to fall below 40 deg F for
three successive days, maintain delivered concrete mixture temperature within
the temperature range required by ACI 301.
3. Do not use frozen materials or materials containing ice or snow.
4. Do not place concrete in contact with surfaces less than 35 deg F, other than
reinforcing steel.
5. Do not use calcium chloride, salt, or other materials containing antifreeze agents
or chemical accelerators unless otherwise specified and approved in mixture
designs.
B. Hot-Weather Placement: Comply with ACI 301 and ACI 305.1, and as follows:
1. Maintain concrete temperature at time of discharge to not exceed 95 deg F.
2. Fog-spray forms, steel reinforcement, and subgrade just before placing concrete.
Keep subgrade uniformly moist without standing water, soft spots, or dry areas.
1.10 WARRANTY
A. Manufacturer's Warranty: Manufacturer agrees to furnish replacement sheet vapor
retarder/termite barrier material and accessories for sheet vapor retarder/ termite barrier
and accessories that do not comply with requirements or that fail to resist penetration
by termites within specified warranty period.
1. Warranty Period: 10 years from date of Substantial Completion.
PART 2 - PRODUCTS
2.1 CONCRETE, GENERAL
A. ACI Publications: Comply with ACI 301 unless modified by requirements in the
Contract Documents.
2.2 CONCRETE MATERIALS
A. Regional Materials: Concrete shall be manufactured within 100 miles of Project site
from aggregates and cementitious materials that have been extracted, harvested, or
recovered, as well as manufactured, within 100 miles of Project site.
B. Source Limitations:
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 6
1. Obtain all concrete mixtures from a single ready-mixed concrete manufacturer
for entire Project.
2. Obtain each type or class of cementitious material of the same brand from the
same manufacturer's plant.
3. Obtain aggregate from single source.
4. Obtain each type of admixture from single source from single manufacturer.
C. Cementitious Materials:
1. Portland Cement: ASTM C150, Type I/II.
2. Slag Cement: ASTM C989/C989M, Grade 100 or 120.
3. Blended Hydraulic Cement: ASTM C595/C595M, Type IS, portland
blast-furnace slag, Type IP, portland-pozzolan, as approved by engineer for the
application.
4. Silica Fume: ASTM C1240 amorphous silica.
D. Normal-Weight Aggregates: ASTM C33/C33M, Class as required for application,
coarse aggregate or better, graded. Provide aggregates from a single source.
E. Lightweight Aggregate: ASTM C330/C330M, 3/4-inch nominal maximum aggregate
size.
F. Air-Entraining Admixture: ASTM C260/C260M.
G. Chemical Admixtures: Certified by manufacturer to be compatible with other
admixtures that do not contribute water-soluble chloride ions exceeding those permitted
in hardened concrete. Do not use calcium chloride or admixtures containing calcium
chloride.
H. Water and Water Used to Make Ice: ASTM C94/C94M, potable.
2.3 FIBER REINFORCEMENT
A. Synthetic Macro-Fiber: In accordance with the contract drawings.
2.4 VAPOR RETARDERS
A. Sheet Vapor Retarder, Class A: ASTM E1745, Class A; not less than 15 mils thick.
Include manufacturer's recommended adhesive or pressure-sensitive tape.
2.5 LIQUID FLOOR TREATMENTS
A. Penetrating Liquid Floor Treatment: Clear, chemically reactive, waterborne solution of
inorganic silicate or siliconate materials and proprietary components; odorless; that
penetrates, hardens, and densifies concrete surfaces.
1. Products shall comply with the requirements of the California Department of
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 7
Public Health's "Standard Method for the Testing and Evaluation of Volatile
Organic Chemical Emissions from Indoor Sources Using Environmental
Chambers."
2.6 CURING MATERIALS
A. Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf,
weighing approximately 9 oz./sq. yd. when dry.
B. Moisture-Retaining Cover: ASTM C171, polyethylene film burlap-polyethylene sheet.
1. Color:
a. Ambient Temperature Below 50 deg F: Black.
b. Ambient Temperature between 50 deg F and 85 deg F: Any color.
c. Ambient Temperature Above 85 deg F: White.
C. Clear, Waterborne, Membrane-Forming, Dissipating Curing Compound: ASTM C309,
Type 1, Class B.
D. Clear, Waterborne, Membrane-Forming, Nondissipating Curing Compound:
ASTM C309, Type 1, Class B, certified by curing compound manufacturer to not
interfere with bonding of floor covering.
E. Clear, Waterborne, Membrane-Forming, Curing Compound: ASTM C309, Type 1,
Class B, 18 to 25 percent solids, nondissipating, certified by curing compound
manufacturer to not interfere with bonding of floor covering.
F. Clear, Solvent-Borne, Membrane-Forming, Curing and Sealing Compound:
ASTM C1315, Type 1, Class A.
1. Products shall comply with the requirements of the California Department of
Public Health's "Standard Method for the Testing and Evaluation of Volatile
Organic Chemical Emissions from Indoor Sources Using Environmental
Chambers."
G. Clear, Waterborne, Membrane-Forming, Curing and Sealing Compound:
ASTM C1315, Type 1, Class A.
1. Products shall comply with the requirements of the California Department of
Public Health's "Standard Method for the Testing and Evaluation of Volatile
Organic Chemical Emissions from Indoor Sources Using Environmental
Chambers."
2.7 RELATED MATERIALS
A. Expansion- and Isolation-Joint-Filler Strips: ASTM D1751, asphalt-saturated cellulosic
fiber or ASTM D1752, cork or self-expanding cork.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 8
B. Semirigid Joint Filler: Two-component, semirigid, 100 percent solids, epoxy resin with
a Type A shore durometer hardness of 80 in accordance with ASTM D2240.
C. Bonding Agent: ASTM C1059/C1059M, Type II, nonredispersible, acrylic emulsion or
styrene butadiene.
D. Epoxy Bonding Adhesive: ASTM C881, two-component epoxy resin, capable of humid
curing and bonding to damp surfaces, of class suitable for application temperature and
of grade and class to suit requirements, and as follows:
1. Types IV and V, load bearing, for bonding hardened or freshly mixed concrete to
hardened concrete.
E. Floor Slab Protective Covering: Eight-feet- wide cellulose fabric.
2.8 REPAIR MATERIALS
A. Repair Underlayment: Cement-based, polymer-modified, self-leveling product that can
be applied in thicknesses from 1/8 inch and that can be feathered at edges to match
adjacent floor elevations.
1. Cement Binder: ASTM C150/C150M portland cement or hydraulic or blended
hydraulic cement, as defined in ASTM C219.
2. Primer: Product of underlayment manufacturer recommended for substrate,
conditions, and application.
3. Aggregate: Well-graded, washed gravel, 1/8 to 1/4 inch or coarse sand, as
recommended by underlayment manufacturer.
4. Compressive Strength: Not less than 4100 psi at 28 days when tested in
accordance with ASTM C109.
B. Repair Overlayment: Cement-based, polymer-modified, self-leveling product that can
be applied in thicknesses from 1/4 inch (6 mm) and that can be filled in over a scarified
surface to match adjacent floor elevations.
1. Cement Binder: ASTM C150 portland cement or hydraulic or blended hydraulic
cement, as defined in ASTM C219.
2. Primer: Product of topping manufacturer recommended for substrate, conditions,
and application.
3. Aggregate: Well-graded, washed gravel, 1/8 to 1/4 inch or coarse sand as
recommended by topping manufacturer.
4. Compressive Strength: Not less than 5000 psi at 28 days when tested in
accordance with ASTM C109.
2.9 CONCRETE MIXTURES, GENERAL
A. Prepare design mixtures for each type and strength of concrete, proportioned on the
basis of laboratory trial mixture or field test data, or both, in accordance with ACI 301.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 9
1. Use a qualified testing agency for preparing and reporting proposed mixture
designs, based on laboratory trial mixtures.
B. Cementitious Materials: Limit percentage, by weight, of cementitious materials other
than portland cement in concrete as follows:
1. Other Pozzolans: 25 percent by mass.
2. Slag Cement: 50 percent by mass.
3. Silica Fume: 10 percent by mass.
4. Total of Other Pozzolans, Slag Cement, and Silica Fume: 50 percent by mass,
with pozzolans not exceeding 25 percent by mass and silica fume not exceeding
10 percent by mass.
5. Total of Other Pozzolans and Silica Fume: 35 percent by mass with pozzolans
not exceeding 25 percent by mass and silica fume not exceeding 10 percent by
mass.
C. Admixtures: Use admixtures in accordance with manufacturer's written instructions.
2.10 CONCRETE MIXTURES
A. Provide concrete mixtures in accordance with contract drawings.
2.11 CONCRETE MIXING
A. Ready-Mixed Concrete: Measure, batch, mix, and deliver concrete in accordance with
ASTM C94 and ASTM C1116, and furnish batch ticket information.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Verification of Conditions:
1. Before placing concrete, verify that installation of concrete forms, accessories,
and reinforcement, and embedded items is complete and that required inspections
have been performed.
2. Do not proceed until unsatisfactory conditions have been corrected.
3.2 PREPARATION
A. Provide reasonable auxiliary services to accommodate field testing and
inspections, acceptable to testing agency, including the following:
1. Daily access to the Work.
2. Incidental labor and facilities necessary to facilitate tests and inspections.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 10
3. Secure space for storage, initial curing, and field curing of test samples, including
source of water and continuous electrical power at Project site during site curing
period for test samples.
4.Security and protection for test samples and for testing and inspection equipment
at Project site.
3.3 INSTALLATION OF EMBEDDED ITEMS
A. Place and secure anchorage devices and other embedded items required for adjoining
Work that is attached to or supported by cast-in-place concrete.
1. Use setting drawings, templates, diagrams, instructions, and directions furnished
with items to be embedded.
2. Install anchor rods, accurately located, to elevations required and complying with
tolerances in Section 7.5 of ANSI/AISC 303.
3. Install reglets to receive waterproofing and to receive through-wall flashings in
outer face of concrete frame at exterior walls, where flashing is shown at lintels,
shelf angles, and other conditions.
3.4 INSTALLATION OF VAPOR RETARDER
A. Sheet Vapor Retarders: Place, protect, and repair sheet vapor retarder in accordance
with ASTM E1643 and manufacturer's written instructions.
1. Install vapor retarder with longest dimension parallel with direction of concrete
pour.
2. Face laps away from exposed direction of concrete pour.
3. Lap vapor retarder over footings not less than 6 inches, sealing vapor retarder to
concrete.
4. Lap joints 6 inches and seal with manufacturer's recommended tape.
5. Terminate vapor retarder at the top of floor slabs, sealing entire perimeter to floor
slabs or foundation walls.
6. Seal penetrations in accordance with vapor retarder manufacturer's instructions.
7. Protect vapor retarder during placement of reinforcement and concrete.
a. Repair damaged areas by patching with vapor retarder material,
overlapping damages area by 6 inches (150 mm) on all sides, and sealing to
vapor retarder.
3.5 JOINTS
A. Construct joints true to line, with faces perpendicular to surface plane of concrete.
B. Construction Joints: Coordinate with floor slab pattern and concrete placement
sequence.
1. Install so strength and appearance of concrete are not impaired, at locations
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 11
indicated on Drawings or as approved by Architect.
2. Place joints perpendicular to main reinforcement.
a. Continue reinforcement across construction joints unless otherwise
indicated.
b. Do not continue reinforcement through sides of strip placements of floors
and slabs.
3. Form keyed joints as indicated. Embed keys at least 1-1/2 inches into concrete.
4. Locate horizontal joints in walls and columns at underside of floors, slabs,
beams, and girders and at the top of footings or floor slabs.
5. Space vertical joints in walls as indicated on Drawings. Unless otherwise
indicated on Drawings, locate vertical joints beside piers integral with walls, near
corners, and in concealed locations where possible.
6. Use epoxy-bonding adhesive at locations where fresh concrete is placed against
hardened or partially hardened concrete surfaces.
C. Control Joints in Slabs-on-Ground: Form weakened-plane control joints, sectioning
concrete into areas as indicated. Construct control joints for a depth equal to at least 1
¼” as follows:
1. Grooved Joints: Form control joints after initial floating by grooving and
finishing each edge of joint to a radius of 1/8 inch (3.2 mm). Repeat grooving of
control joints after applying surface finishes. Eliminate groover tool marks on
concrete surfaces.
2. Sawed Joints: Form control joints with power saws equipped with shatterproof
abrasive or diamond-rimmed blades. Cut 1/8-inch- wide joints into concrete
when cutting action does not tear, abrade, or otherwise damage surface and
before concrete develops random cracks.
D. Isolation Joints in Slabs-on-Ground: After removing formwork, install joint-filler
strips at slab junctions with vertical surfaces, such as column pedestals,
foundation walls, grade beams, and other locations, as indicated.
1. Terminate full-width joint-filler strips not less than 1/2 inch (13 mm) or more
than 1 inch (25 mm) below finished concrete surface, where joint sealants,
specified in Section 079200 "Joint Sealants," are indicated.
2. Install joint-filler strips in lengths as long as practicable. Where more than one
length is required, lace or clip sections together.
E. Doweled Joints:
1. Install dowel bars and support assemblies at joints where indicated on Drawings.
2. Lubricate or asphalt coat one-half of dowel bar length to prevent concrete
bonding to one side of joint.
F. Dowel Plates: Install dowel plates at joints where indicated on Drawings as an alternate
to traditional doweled joints.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 12
3.6 CONCRETE PLACEMENT
A. Before placing concrete, verify that installation of formwork, reinforcement, embedded
items, and vapor retarder is complete and that required inspections are completed.
1. Immediately prior to concrete placement, inspect vapor retarder for damage and
deficient installation, and repair defective areas.
2. Provide continuous inspection of vapor retarder during concrete placement and
make necessary repairs to damaged areas as Work progresses.
B. Notify Architect and testing and inspection agencies 24 hours prior to commencement
of concrete placement.
C. Do not add water to concrete during delivery, at Project site, or during placement
unless approved by Architect in writing, but not to exceed the amount indicated on the
concrete delivery ticket.
1. Do not add water to concrete after adding high-range water-reducing admixtures
to mixture.
D. Deposit concrete continuously in one layer or in horizontal layers of such thickness that
no new concrete is placed on concrete that has hardened enough to cause seams or
planes of weakness.
1. If a section cannot be placed continuously, provide construction joints as
indicated.
2. Deposit concrete to avoid segregation.
3. Deposit concrete in horizontal layers of depth not to exceed formwork design
pressures and in a manner to avoid inclined construction joints.
4. Consolidate placed concrete with mechanical vibrating equipment in accordance
with ACI 301.
a. Do not use vibrators to transport concrete inside forms.
b. Insert and withdraw vibrators vertically at uniformly spaced locations to
rapidly penetrate placed layer and at least 6 inches into preceding layer.
c. Do not insert vibrators into lower layers of concrete that have begun to lose
plasticity.
d. At each insertion, limit duration of vibration to time necessary to
consolidate concrete, and complete embedment of reinforcement and other
embedded items without causing mixture constituents to segregate.
E. Deposit and consolidate concrete for floors and slabs in a continuous operation, within
limits of construction joints, until placement of a panel or section is complete.
1. Do not place concrete floors and slabs in a checkerboard sequence.
2. Consolidate concrete during placement operations, so concrete is thoroughly
worked around reinforcement and other embedded items and into corners.
3. Maintain reinforcement in position on chairs during concrete placement.
4. Screed slab surfaces with a straightedge and strike off to correct elevations.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 13
5. Level concrete, cut high areas, and fill low areas.
6. Slope surfaces uniformly to drains where required.
7. Begin initial floating using bull floats or darbies to form a uniform and
open-textured surface plane, before excess bleedwater appears on the surface.
8. Do not further disturb slab surfaces before starting finishing operations.
3.7 FINISHING FORMED SURFACES
A. Rough-Formed Finish: As-cast concrete texture imparted by form-facing material
with tie holes and defects repaired and patched. Remove fins and other projections
that exceed specified limits on formed-surface irregularities.
1. Apply to concrete surfaces not exposed to public view.
B. Smooth-Formed Finish: As-cast concrete texture imparted by form-facing material,
arranged in an orderly and symmetrical manner with a minimum of seams. Repair and
patch tie holes and defects. Remove fins and other projections that exceed specified
limits on formed-surface irregularities.
1. Apply to concrete surfaces exposed to public view, to receive a rubbed finish,
orto be covered with a coating or covering material applied directly to concrete.
C. Rubbed Finish: Apply the following to smooth-formed finished as-cast concrete
where indicated:
1. Smooth-Rubbed Finish: Not later than one day after form removal, moisten
concrete surfaces and rub with carborundum brick or another abrasive until
producing a uniform color and texture. Do not apply cement grout other than
that created by the rubbing process.
2. Grout-Cleaned Finish: Wet concrete surfaces and apply grout of a consistency
of thick paint to coat surfaces and fill small holes. Mix one part portland
cement to one and one-half parts fine sand with a 1:1 mixture of bonding
admixture and water. Add white portland cement in amounts determined by
trial patches so color of dry grout will match adjacent surfaces. Scrub grout into
voids and remove excess grout. When grout whitens, rub surface with clean
burlap and keep surface damp by fog spray for at least 36 hours.
3. Cork-Floated Finish: Wet concrete surfaces and apply a stiff grout. Mix one
part portland cement and one part fine sand with a 1:1 mixture of bonding agent
and water. Add white portland cement in amounts determined by trial patches
so color of dry grout will match adjacent surfaces. Compress grout into voids
by grinding surface. In a swirling motion, finish surface with a cork float.
D. Related Unformed Surfaces: At tops of walls, horizontal offsets, and similar unformed
surfaces adjacent to formed surfaces, strike off smooth and finish with a texture
matching adjacent formed surfaces. Continue final surface treatment of formed
surfaces uniformly across adjacent unformed surfaces, unless otherwise indicated.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 14
3.8 FINISHING FLOORS AND SLABS
A. General: Comply with ACI 302.1R recommendations for screeding, restraightening,
and finishing operations for concrete surfaces. Do not wet concrete surfaces.
B. Scratch Finish: While still plastic, texture concrete surface that has been screeded and
bull-floated or darbied. Use stiff brushes, brooms, or rakes to produce a profile
amplitude of 1/4 inch in 1 direction.
C. Float Finish: Consolidate surface with power-driven floats or by hand floating if area
is small or inaccessible to power driven floats. Restraighten, cut down high spots, and
fill low spots. Repeat float passes and restraightening until surface is left with a
uniform, smooth, granular texture.
D. Trowel Finish: After applying float finish, apply first troweling and consolidate
concrete by hand or power-driven trowel. Continue troweling passes and restraighten
until surface is free of trowel marks and uniform in texture and appearance. Grind
smooth any surface defects that would telegraph through applied coatings or floor
coverings.
1. Finish surfaces to the following tolerances, according to ASTM E 1155, for a
randomly trafficked floor surface:
a. Specified overall values of flatness, F(F) 35; and of levelness, F(L) 25;
with minimum local values of flatness, F(F) 24; and of levelness, F(L) 17;
for slabs-on-grade.
E. Trowel and Fine-Broom Finish: Apply a first trowel finish to surfaces where ceramic
or quarry tile is to be installed by either thickset or thin-set method. While concrete is
still plastic, slightly scarify surface with a fine broom.
1. Comply with flatness and levelness tolerances for trowel finished floor surfaces.
F. Broom Finish: Apply a broom finish to exterior concrete platforms, steps, and ramps,
and elsewhere as indicated.
1. Immediately after float finishing, slightly roughen trafficked surface by brooming
with fiber-bristle broom perpendicular to main traffic route. Coordinate
required final finish with Architect before application.
G. Dry-Shake Floor Hardener Finish: After initial floating, apply dry-shake floor
hardener to surfaces according to manufacturer's written instructions and as follows:
1. Uniformly apply dry-shake floor hardener at a rate of 100 lb/100 sq. ft. unless
greater amount is recommended by manufacturer.
2. Uniformly distribute approximately two-thirds of dry-shake floor hardener over
surface by hand or with mechanical spreader, and embed by power floating.
Follow power floating with a second dry-shake floor hardener application,
uniformly distributing remainder of material, and embed by power floating.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 15
3. After final floating, apply a trowel finish. Cure concrete with curing compound
recommended by dry-shake floor hardener manufacturer and apply immediately
after final finishing.
3.9 INSTALLATION OF MISCELLANEOUS CONCRETE ITEMS
A. Filling In:
1. Fill in holes and openings left in concrete structures after Work of other trades is
in place unless otherwise indicated.
2. Mix, place, and cure concrete, as specified, to blend with in-place construction.
3. Provide other miscellaneous concrete filling indicated or required to complete the
Work.
B. Curbs: Provide monolithic finish to interior curbs by stripping forms while concrete is
still green and by steel-troweling surfaces to a hard, dense finish with corners,
intersections, and terminations slightly rounded.
C. Steel Pan Stairs: Provide concrete fill for steel pan stair treads, landings, and associated
items.
1. Cast-in inserts and accessories, as shown on Drawings.
2.Screed, tamp, and trowel finish concrete surfaces.
3.10 CONCRETE CURING
A. Protect freshly placed concrete from premature drying and excessive cold or hot
temperatures.
1. Comply with ACI 301 and ACI 306.1 for cold weather protection during curing.
2. Comply with ACI 301 and ACI 305.1 for hot-weather protection during curing.
3. Maintain moisture loss no more than 0.2 lb/sq. ft. x h, calculated in accordance
with ACI 305.1, before and during finishing operations.
B. Curing Formed Surfaces: Comply with ACI 308.1 as follows:
1. Cure formed concrete surfaces, including underside of beams, supported slabs,
and other similar surfaces.
2. Cure concrete containing color pigments in accordance with color pigment
manufacturer's instructions.
3. If forms remain during curing period, moist cure after loosening forms.
4. If removing forms before end of curing period, continue curing for remainder of
curing period, as follows:
a. Continuous Fogging: Maintain standing water on concrete surface until
final setting of concrete.
b. Continuous Sprinkling: Maintain concrete surface continuously wet.
c. Absorptive Cover: Pre-dampen absorptive material before application;
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 16
apply additional water to absorptive material to maintain concrete surface
continuously wet.
d. Water-Retention Sheeting Materials: Cover exposed concrete surfaces with
sheeting material, taping, or lapping seams.
e. Membrane-Forming Curing Compound: Apply uniformly in continuous
operation by power spray or roller in accordance with manufacturer's
written instructions.
1) Recoat areas subject to heavy rainfall within three hours after initial
application.
2) Maintain continuity of coating and repair damage during curing
period.
C. Curing Unformed Surfaces: Comply with ACI 308.1 as follows:
1. Begin curing immediately after finishing concrete.
2. Interior Concrete Floors:
a. Floors to Receive Floor Coverings Specified in Other Sections: Contractor
has option of the following:
1) Absorptive Cover: As soon as concrete has sufficient set to permit
application without marring concrete surface, install prewetted
absorptive cover over entire area of floor.
a) Lap edges and ends of absorptive cover not less than
12-inches.
b) Maintain absorptive cover water saturated, and in place, for
duration of curing period, but not less than seven days.
2) Moisture-Retaining-Cover Curing: Cover concrete surfaces with
moisture-retaining cover for curing concrete, placed in widest
practicable width, with sides and ends lapped at least 12 inches
sealed by waterproof tape or adhesive.
a) Immediately repair any holes or tears during curing period,
using cover material and waterproof tape.
b) Cure for not less than seven days.
3) Ponding or Continuous Sprinkling of Water: Maintain concrete
surfaces continuously wet for not less than seven days, utilizing
one, or a combination of, the following:
a) Water.
b) Continuous water-fog spray.
b. Floors to Receive Penetrating Liquid Floor Treatments: Contractor has
option of the following:
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 17
1) Absorptive Cover: As soon as concrete has sufficient set to permit
application without marring concrete surface, install prewetted
absorptive cover over entire area of floor.
a) Lap edges and ends of absorptive cover not less than 12
inches.
b) Maintain absorptive cover water saturated, and in place, for
duration of curing period, but not less than seven days.
2) Moisture-Retaining-Cover Curing: Cover concrete surfaces with
moisture-retaining cover for curing concrete, placed in widest
practicable width, with sides and ends lapped at least 12 inches, and
sealed by waterproof tape or adhesive.
a) Immediately repair any holes or tears during curing period,
using cover material and waterproof tape.
b) Cure for not less than seven days.
3) Ponding or Continuous Sprinkling of Water: Maintain concrete
surfaces continuously wet for not less than seven days, utilizing
one, or a combination of, the following:
a) Water.
b) Continuous water-fog spray.
c. Floors to Receive Polished Finish: Contractor has option of the following:
1) Absorptive Cover: As soon as concrete has sufficient set to permit
application without marring concrete surface, install prewetted
absorptive cover over entire area of floor.
a) Lap edges and ends of absorptive cover not less than 12
inches.
b) Maintain absorptive cover water saturated, and in place, for
duration of curing period, but not less than seven days.
2) Ponding or Continuous Sprinkling of Water: Maintain concrete
surfaces continuously wet for not less than seven days, utilizing
one, or a combination of, the following:
a) Water.
b) Continuous water-fog spray.
d. Floors to Receive Curing Compound:
1) Apply uniformly in continuous operation by power spray or roller in
accordance with manufacturer's written instructions.
2) Recoat areas subjected to heavy rainfall within three hours after
initial application.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 18
3) Maintain continuity of coating, and repair damage during curing
period.
4) Removal: After curing period has elapsed, remove curing
compound without damaging concrete surfaces by method
recommended by curing compound manufacturer.
e. Floors to Receive Curing and Sealing Compound:
1) Apply uniformly to floors and slabs indicated in a continuous
operation by power spray or roller in accordance with
manufacturer's written instructions.
2) Recoat areas subjected to heavy rainfall within three hours after
initial application.
3) Repeat process 24 hours later, and apply a second coat. Maintain
continuity of coating, and repair damage during curing period.
3.11 TOLERANCES
A. Conform to ACI 117.
3.12 APPLICATION OF LIQUID FLOOR TREATMENTS
A. Penetrating Liquid Floor Treatment: Prepare, apply, and finish penetrating liquid floor
treatment in accordance with manufacturer's written instructions.
1. Remove curing compounds, sealers, oil, dirt, laitance, and other contaminants
and complete surface repairs.
2. Do not apply to concrete that is less than seven days old.
3. Apply liquid until surface is saturated, scrubbing into surface until a gel forms;
rewet; and repeat brooming or scrubbing.
4. Rinse with water; remove excess material until surface is dry.
5. Apply a second coat in a similar manner if surface is rough or porous.
B. Sealing Coat: Uniformly apply a continuous sealing coat of curing and sealing
compound to hardened concrete by power spray or roller in accordance with
manufacturer's written instructions.
3.13 JOINT FILLING
A. Prepare, clean, and install joint filler in accordance with manufacturer's written
instructions.
1. Defer joint filling until concrete has aged at least one month(s).
2. Do not fill joints until construction traffic has permanently ceased.
B. Remove dirt, debris, saw cuttings, curing compounds, and sealers from joints; leave
contact faces of joints clean and dry.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 19
C. Install semirigid joint filler full depth in saw-cut joints and at least 2 inches deep in
formed joints.
D. Overfill joint, and trim joint filler flush with top of joint after hardening.
3.14 CONCRETE SURFACE REPAIRS
A. Defective Concrete:
1. Repair and patch defective areas when approved by Architect.
2. Remove and replace concrete that cannot be repaired and patched to Architect's
approval.
B. Patching Mortar: Mix dry-pack patching mortar, consisting of 1 part portland cement to
2-1/2 parts fine aggregate passing a No. 16 sieve, using only enough water for handling
and placing.
C. Repairing Formed Surfaces: Surface defects include color and texture irregularities,
cracks, spalls, air bubbles, honeycombs, rock pockets, fins and other projections on the
surface, and stains and other discolorations that cannot be removed by cleaning.
1. Immediately after form removal, cut out honeycombs, rock pockets, and voids
more than 1/2 inch in any dimension to solid concrete.
a. Limit cut depth to 3/4 inch .
b. Make edges of cuts perpendicular to concrete surface.
c. Clean, dampen with water, and brush-coat holes and voids with bonding
agent.
d. Fill and compact with patching mortar before bonding agent has dried.
e. Fill form-tie voids with patching mortar or cone plugs secured in place
with bonding agent.
2. Repair defects on surfaces exposed to view by blending white portland cement
and standard portland cement, so that, when dry, patching mortar matches
surrounding color.
a. Patch a test area at inconspicuous locations to verify mixture and color
match before proceeding with patching.
b. Compact mortar in place and strike off slightly higher than surrounding
surface.
3. Repair defects on concealed formed surfaces that will affect concrete's durability
and structural performance as determined by Architect.
D. Repairing Unformed Surfaces:
1. Test unformed surfaces, such as floors and slabs, for finish, and verify surface
tolerances specified for each surface.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 20
a. Correct low and high areas.
b. Test surfaces sloped to drain for trueness of slope and smoothness; use a
sloped template.
2. Repair finished surfaces containing surface defects, including spalls, popouts,
honeycombs, rock pockets, crazing, and cracks in excess of 0.01 inch wide or
that penetrate to reinforcement or completely through unreinforced sections
regardless of width, and other objectionable conditions.
3. After concrete has cured at least 14 days, correct high areas by grinding.
4. Correct localized low areas during, or immediately after, completing
surface-finishing operations by cutting out low areas and replacing with patching
mortar.
a. Finish repaired areas to blend into adjacent concrete.
5. Correct other low areas scheduled to receive floor coverings with a repair
underlayment.
a. Prepare, mix, and apply repair underlayment and primer in accordance with
manufacturer's written instructions to produce a smooth, uniform, plane,
and level surface.
b. Feather edges to match adjacent floor elevations.
6. Correct other low areas scheduled to remain exposed with repair topping.
a. Cut out low areas to ensure a minimum repair topping depth of 1/4 to
match adjacent floor elevations.
b. Prepare, mix, and apply repair topping and primer in accordance with
manufacturer's written instructions to produce a smooth, uniform, plane,
and level surface.
7. Repair defective areas, except random cracks and single holes 1 inch or less in
diameter, by cutting out and replacing with fresh concrete.
a. Remove defective areas with clean, square cuts, and expose steel
reinforcement with at least a 3/4-inch clearance all around.
b. Dampen concrete surfaces in contact with patching concrete and apply
bonding agent.
c. Mix patching concrete of same materials and mixture as original concrete,
except without coarse aggregate.
d. Place, compact, and finish to blend with adjacent finished concrete.
e. Cure in same manner as adjacent concrete.
8. Repair random cracks and single holes 1 inch or less in diameter with patching
mortar.
a. Groove top of cracks and cut out holes to sound concrete, and clean off
dust, dirt, and loose particles.
b. Dampen cleaned concrete surfaces and apply bonding agent.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 21
c. Place patching mortar before bonding agent has dried.
d. Compact patching mortar and finish to match adjacent concrete.
e. Keep patched area continuously moist for at least 72 hours.
E. Perform structural repairs of concrete, subject to Architect's approval, using epoxy
adhesive and patching mortar.
F. Repair materials and installation not specified above may be used, subject to Architect's
approval.
3.15 FIELD QUALITY CONTROL
A. Special Inspections: Owner will engage a special inspector to perform field tests and
inspections and prepare testing and inspection reports in accordance with the Statement
of Special Inspections as indicated on the Contract Drawings.
B. Batch Tickets: For each load delivered, submit three copies of batch delivery ticket to
testing agency, indicating quantity, mix identification, admixtures, design strength,
aggregate size, design air content, design slump at time of batching, and amount of
water that can be added at Project site.
C. Inspections:
1. Headed bolts and studs.
2. Verification of use of required design mixture.
3. Concrete placement, including conveying and depositing.
4. Curing procedures and maintenance of curing temperature.
5. Verification of concrete strength before removal of shores and forms from beams
and slabs.
D. Concrete Tests: Testing of composite samples of fresh concrete obtained in accordance
with ASTM C 172/C 172M shall be performed in accordance with the following
requirements:
1. Testing Frequency: Test at the frequency indicated on the Contract Drawings.
2. Slump: ASTM C143/C143M:
a. One test at point of placement for each composite sample, but not less than
one test for each day's pour of each concrete mixture.
b. Perform additional tests when concrete consistency appears to change.
3. Air Content: ASTM C231/C231M pressure method, for normal-weight concrete;
ASTM C173/C173M volumetric method, for structural lightweight concrete.
a. One test for each composite sample, but not less than one test for each
day's pour of each concrete mixture.
4. Concrete Temperature: ASTM C1064:
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 22
a. One test hourly when air temperature is 40 deg F and below or 80 deg F
and above, and one test for each composite sample.
5. Unit Weight: ASTM C567/C567M fresh unit weight of structural lightweight
concrete.
a. One test for each composite sample, but not less than one test for each
day's pour of each concrete mixture.
6. Compression Test Specimens: ASTM C31:
a. Cast and laboratory field and laboratory compression test cylinders in
accordance with the Contract Drawings.
7. Compressive-Strength Tests: ASTM C39/C39M.
a. Test one set of two laboratory-cured specimens at seven days and one set
of two specimens at 28 days.
b. A compressive-strength test shall be the average compressive strength from
a set of two specimens obtained from same composite sample and tested at
age indicated.
8. When strength of field-cured cylinders is less than 85 percent of companion
laboratory-cured cylinders, Contractor shall evaluate operations and provide
corrective procedures for protecting and curing in-place concrete.
9. Strength of each concrete mixture will be satisfactory if every average of any
three consecutive compressive-strength tests equals or exceeds specified
compressive strength, and no compressive-strength test value falls below
specified compressive strength by more than 500 psi if specified compressive
strength is 5000 psi, or no compressive strength test value is less than 10 percent
of specified compressive strength if specified compressive strength is greater
than 5000.
10. Nondestructive Testing: Impact hammer, sonoscope, or other nondestructive
device may be permitted by Architect but will not be used as sole basis for
approval or rejection of concrete.
11. Additional Tests:
a. Testing and inspecting agency shall make additional tests of concrete when
test results indicate that slump, air entrainment, compressive strengths, or
other requirements have not been met, as directed by Architect.
b. Testing and inspecting agency may conduct tests to determine adequacy of
concrete by cored cylinders complying with ASTM C42 or by other
methods as directed by Architect.
1) Acceptance criteria for concrete strength shall be in accordance with
ACI 301, section 1.6.6.3.
12. Additional testing and inspecting, at Contractor's expense, will be performed to
determine compliance of replaced or additional work with specified
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
CAST-IN-PLACE CONCRETE 033000 - 23
requirements.
13. Correct deficiencies in the Work that test reports and inspections indicate do not
comply with the Contract Documents.
E. Measure floor and slab flatness and levelness in accordance with ASTM E1155 within
48 hours of completion of floor finishing and promptly report test results to Architect.
3.16 PROTECTION
A. Protect concrete surfaces as follows:
1. Protect from petroleum stains.
2. Diaper hydraulic equipment used over concrete surfaces.
3. Prohibit vehicles from interior concrete slabs.
4. Prohibit use of pipe-cutting machinery over concrete surfaces.
5. Prohibit placement of steel items on concrete surfaces.
6. Prohibit use of acids or acidic detergents over concrete surfaces.
7. Protect liquid floor treatment from damage and wear during the remainder of
construction period. Use protective methods and materials, including temporary
covering, recommended in writing by liquid floor treatments installer.
8. Protect concrete surfaces scheduled to receive surface hardener or polished
concrete finish using Floor Slab Protective Covering.
END OF SECTION 033000
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 1
SECTION 034100 - PRECAST STRUCTURAL CONCRETE
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Precast structural concrete.
2. Precast structural concrete with commercial architectural finish.
B. Related Requirements:
1. Section 033000 "Cast-in-Place Concrete" for placing connection anchors in
concrete.
2. Section 051200 "Structural Steel Framing" for furnishing and installing
connections attached to structural-steel framing.
3. Section 071900 "Water Repellents" for water-repellent finish treatments.
1.3 DEFINITIONS
A. Design Reference Sample: Sample of approved precast structural concrete color, finish,
and texture, preapproved by Architect.
1.4 ACTION SUBMITTALS
A. Product Data: For each type of product.
B. Sustainable Design Submittals:
1. Environmental Product Declaration (EPD): For each product.
2. Product Certificates: For indigenous materials, indicating location of material
manufacturer and point of extraction, harvest, or recovery for each raw material.
Include distance to Project, means of transportation, and cost for each indigenous
material.
C. Design Mixtures: For each precast concrete mixture. Include compressive strength and,
if required, water-absorption tests.
D. Shop Drawings:
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 2
1. Include member locations, plans, elevations, dimensions, shapes and sections,
openings, support conditions, and types of reinforcement, including special
reinforcement.
2. Detail fabrication and installation of precast structural concrete units, including
connections at member ends and to adjoining construction.
3. Indicate joints, reveals, drips, chamfers, and extent and location of each surface
finish.
4. Indicate type, size, and length of welded connections by AWS standard symbols.
5. Detail loose and cast-in hardware, lifting and erection inserts, connections, and
joints.
6. Indicate locations, tolerances, and details of anchorage devices to be embedded
in or attached to structure or other construction.
7. Indicate location of each precast structural concrete unit by same identification
mark placed on panel.
8. Indicate relationship of precast structural concrete units to adjacent materials.
9. Indicate shim sizes and grouting sequence.
10. If design modifications are proposed to meet performance requirements and field
conditions, submit design calculations and Shop Drawings. Do not adversely
affect the appearance, durability, or strength of units when modifying details or
materials and maintain the general design concept.
E. Delegated-Design Submittal: For precast structural concrete indicated to comply with
performance requirements and design criteria, including analysis data signed and sealed
by the qualified professional engineer responsible for their preparation.
1. Show precast structural concrete unit types, connections, types of reinforcement,
including special reinforcement, and concrete cover on reinforcement. Indicate
location, type, magnitude, and direction of loads imposed on the building
structural frame from precast structural concrete.
1.5 INFORMATIONAL SUBMITTALS
A. Qualification Data: For Installer and fabricator.
B. Material Certificates: For the following:
1. Cementitious materials.
2. Reinforcing materials and prestressing tendons.
3. Admixtures.
4. Bearing pads.
5. Insulation.
6. Structural-steel shapes and hollow structural sections.
C. Material Test Reports: For aggregates, by a qualified testing agency.
D. Source quality-control reports.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 3
1.6 QUALITY ASSURANCE
A. Fabricator Qualifications: A firm that assumes responsibility for engineering precast
structural concrete units to comply with performance requirements. Responsibility
includes preparation of Shop Drawings and comprehensive engineering analysis by a
qualified professional engineer.
1. Designated as a PCI-certified plant as follows:
a. Group CA, Category C1A - Precast Concrete Products (no prestressed
reinforcement).
B. Installer Qualifications: A precast concrete erector qualified and designated by PCI's
Certificate of Compliance, to erect Category S1 - SimpleStructural Systems.
C. Quality-Control Standard: For manufacturing procedures, testing requirements, and
quality-control recommendations for types of units required, comply with
PCI MNL 116, "Manual for Quality Control for Plants and Production of Structural
Precast Concrete Products."
D. Welding Qualifications: Qualify procedures and personnel according to the following:
1. AWS D1.1/D1.1M, "Structural Welding Code - Steel."
2. AWS D1.4/D1.4M, "Structural Welding Code - Reinforcing Steel."
1.7 COORDINATION
A. Furnish loose connection hardware and anchorage items to be embedded in or attached
to other construction before starting that Work. Provide locations, setting diagrams,
templates, instructions, and directions, as required, for installation.
1.8 DELIVERY, STORAGE, AND HANDLING
A. Support units during shipment on nonstaining shock-absorbing material in same
position as during storage.
B. Store units with adequate bracing and protect units to prevent contact with soil, to
prevent staining, and to prevent cracking, distortion, warping or other physical damage.
1. Store units with dunnage across full width of each bearing point unless otherwise
indicated.
2. Place adequate dunnage of even thickness between each unit.
3. Place stored units so identification marks are clearly visible, and units can be
inspected.
C. Handle and transport units in a manner that avoids excessive stresses that cause
cracking or damage.
D. Lift and support units only at designated points indicated on Shop Drawings.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 4
PART 2 - PRODUCTS
2.1 PERFORMANCE REQUIREMENTS
A. Delegated Design: Engage a qualified professional engineer, as defined in
Section 014000 "Quality Requirements," to design precast structural concrete units.
B. Design Standards: Comply with ACI 318 (ACI 318M) and with design
recommendations in PCI MNL 120, "PCI Design Handbook - Precast and Prestressed
Concrete," applicable to types of precast structural concrete units indicated.
C. Fire-Resistance Calculations: Where indicated, provide precast structural concrete units
whose fire resistance meets prescriptive requirements of authorities having jurisdiction
or has been calculated according to [ACI 216.1 (ACI 216.1M)] [PCI MNL 124,
"Design for Fire Resistance of Precast Prestressed Concrete,"] and is acceptable to
authorities having jurisdiction.
D. Structural Performance: Precast structural concrete units and connections shall
withstand design loads indicated within limits and under conditions indicated.
E. Structural Performance: Provide precast structural concrete units and connections
capable of withstanding the design loads indicated on the Drawings.
1. Design precast structural concrete framing system and connections to maintain
clearances at openings, to allow for fabrication and construction tolerances, to
accommodate live-load deflection, shrinkage and creep of primary building
structure, and other building movements. Maintain precast structural concrete
deflections within limits of ACI 318 (ACI 318M).
2. Fire-Resistance Rating: Select material and minimum thicknesses to provide
indicated fire rating.
2.2 MOLD MATERIALS
A. Molds: Rigid, dimensionally stable, non-absorptive material, warp and buckle free, that
provides continuous precast concrete surfaces within fabrication tolerances indicated;
nonreactive with concrete and suitable for producing required finishes.
1. Mold-Release Agent: Commercially produced form-release agent that does not
bond with, stain, or adversely affect precast concrete surfaces and does not
impair subsequent surface or joint treatments of precast concrete.
B. Surface Retarder: Chemical set retarder, capable of temporarily delaying setting of
newly placed concrete mixture to depth of reveal specified.
2.3 REINFORCING MATERIALS
A. Recycled Content of Steel Products: Postconsumer recycled content plus one-half of
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 5
preconsumer recycled content not less than 60 percent.
B. Reinforcing Bars: ASTM A615/A615M, Grade 60 (Grade 420), deformed.
C. Low-Alloy-Steel Reinforcing Bars: ASTM A706/A706M, deformed.
D. Plain-Steel Welded Wire Reinforcement: ASTM A185/A185M, fabricated from
as-drawn steel wire into flat sheets.
E. Deformed-Steel Welded Wire Reinforcement: ASTM A497/A497M or
ASTM A1064/A1064M, flat sheet.
F. Supports: Suspend reinforcement from back of mold or use bolsters, chairs, spacers,
and other devices for spacing, supporting, and fastening reinforcing bars and welded
wire reinforcement in place according to PCI MNL 116.
2.4 CONCRETE MATERIALS
A. Regional Materials: Concrete shall be manufactured within 100 miles (160 km) of
Project site from aggregates[ and cementitious materials] that have been extracted,
harvested, or recovered, as well as manufactured, within 100 miles (160 km) of Project
site.
B. Portland Cement: ASTM C150/C150M, Type I or Type III, gray, unless otherwise
indicated.
1. For surfaces exposed to view in finished structure, use gray or white cement, of
same type, brand, and mill source.
C. Supplementary Cementitious Materials:
1. Metakaolin: ASTM C618, Class N.
2. Silica Fume: ASTM C1240, with optional chemical and physical requirement.
3. Ground Granulated Blast-Furnace Slag: ASTM C989, Grade 100 or 120.
D. Normal-Weight Aggregates: Except as modified by PCI MNL 116, ASTM C33/C33M,
with coarse aggregates complying with Class 4S. Stockpile fine and coarse aggregates
for each type of exposed finish from a single source (pit or quarry) for Project.
E. Lightweight Aggregates: Except as modified by PCI MNL 116, ASTM C330/C330M,
with absorption less than 11 percent.
F. Water: Potable; free from deleterious material that may affect color stability, setting, or
strength of concrete and complying with chemical limits of PCI MNL 116.
G. Air-Entraining Admixture: ASTM C260, certified by manufacturer to be compatible
with other required admixtures.
H. Chemical Admixtures: Certified by manufacturer to be compatible with other
admixtures and to not contain calcium chloride, or more than 0.15 percent chloride ions
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 6
or other salts by weight of admixture.
1. Water-Reducing Admixtures: ASTM C494/C494M, Type A.
2. Retarding Admixture: ASTM C494/C494M, Type B.
3. Water-Reducing and Retarding Admixture: ASTM C494/C494M, Type D.
4. Water-Reducing and Accelerating Admixture: ASTM C494/C494M, Type E.
5. High-Range, Water-Reducing Admixture: ASTM C494/C494M, Type F.
6. High-Range, Water-Reducing and Retarding Admixture: ASTM C494/C494M,
Type G.
7. Plasticizing Admixture: ASTM C1017/C1017M, Type I.
8.Plasticizing and Retarding Admixture: ASTM C1017/C1017M, Type II.
2.5 STEEL CONNECTION MATERIALS
A. Carbon-Steel Shapes and Plates: ASTM A36/A36M.
B. Carbon-Steel-Headed Studs: ASTM A108, Grade 1010 through 1020, cold finished,
AWS D1.1/D1.1M, Type A or B, with arc shields and with minimum mechanical
properties of PCI MNL 116.
C. Carbon-Steel Plate: ASTM A283/A283M, Grade C.
D. Malleable-Iron Castings: ASTM A47/A47M, Grade 32510 or Grade 35028.
E. Carbon-Steel Castings: ASTM A27/A27M, Grade 60-30 (Grade 415-205).
F. High-Strength, Low-Alloy Structural Steel: ASTM A572/A572M.
G. Carbon-Steel Structural Tubing: ASTM A500/A500M, Grade B or Grade C.
H. Wrought Carbon-Steel Bars: ASTM A675/A675M, Grade 65 (Grade 450).
I. Deformed-Steel Wire or Bar Anchors: ASTM A496/A496M or ASTM A706/A706M.
J. Carbon-Steel Bolts and Studs: ASTM A307, Grade A (ASTM F568M, Property
Class 4.6); carbon-steel, hex-head bolts and studs; carbon-steel nuts, ASTM A563
(ASTM A563M); and flat, unhardened steel washers, ASTM F844.
K. Shop-Primed Finish: Prepare surfaces of nongalvanized-steel items, except those
surfaces to be embedded in concrete, according to requirements in SSPC-SP 3, and
shop apply lead- and chromate-free, rust-inhibitive primer, complying with
performance requirements in MPI 79 according to SSPC-PA 1.
L. Welding Electrodes: Comply with AWS standards.
M. Precast Accessories: Provide clips, hangers, plastic or steel shims, and other accessories
required to install precast structural concrete units.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 7
2.6 BEARING PADS
A. Provide one of the following bearing pads for precast structural concrete units as
recommended by precast fabricator for application:
1. Elastomeric Pads: AASHTO M 251, plain, vulcanized, 100 percent
polychloroprene (neoprene) elastomer, molded to size or cut from a molded
sheet, 50 to 70 Shore, Type A durometer hardness, ASTM D2240; minimum
tensile strength 2250 psi (15.5 MPa), ASTM D412.
2. Random-Oriented-Fiber-Reinforced Elastomeric Pads: Preformed, randomly
oriented synthetic fibers set in elastomer. 70 to 90 Shore, Type A durometer
hardness, ASTM D2240; capable of supporting a compressive stress of 3000 psi
(20.7 MPa) with no cracking, splitting, or delaminating in the internal portions of
pad. Test one specimen for every 200 pads used in Project.
3. Cotton-Duck-Fabric-Reinforced Elastomeric Pads: Preformed, horizontally
layered cotton-duck fabric bonded to an elastomer; 80 to 100 Shore, Type A
durometer hardness, ASTM D2240; complying with AASHTO's "AASHTO
LRFD Bridge Design Specifications," Division II, Section 18.10.2; or with
MIL-C-882E.
4. Frictionless Pads: PTFE, glass-fiber reinforced, bonded to stainless or mild-steel
plate, or random-oriented-fiber-reinforced elastomeric pads; of type required for
in-service stress.
5. High-Density Plastic: Multimonomer, nonleaching, plastic strip.
2.7 ACCESSORIES
A. Precast Accessories: Provide clips, hangers, high-density plastic or steel shims, and
other accessories required to install structural precast concrete units.
2.8 GROUT MATERIALS
A. Sand-Cement Grout: Portland cement, ASTM C150/C150M, Type I, and clean, natural
sand, ASTM C144 or ASTM C404. Mix at ratio of 1 part cement to 2-1/2 to 3 parts
sand, by volume, with minimum water required for placement and hydration.
Water-soluble chloride ion content less than 0.06 percent by weight of cement when
tested according to ASTM C1218/C1218M.
B. Nonmetallic, Nonshrink Grout: Packaged, nonmetallic, noncorrosive, nonstaining grout
containing selected silica sands, portland cement, shrinkage-compensating agents,
plasticizing and water-reducing agents, complying with ASTM C1107/C1107M,
Grade A for drypack and Grades B and C for flowable grout and of consistency
suitable for application within a 30-minute working time. Water-soluble chloride ion
content less than 0.06 percent by weight of cement when tested according to
ASTM C1218/C1218M.
C. Epoxy-Resin Grout: Two-component, mineral-filled epoxy resin; ASTM C881/C881M,
of type, grade, and class to suit requirements.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 8
2.9 CONCRETE MIXTURES
A. Prepare design mixtures for each type of precast concrete required.
B. Design mixtures may be prepared by a qualified independent testing agency or by
qualified precast plant personnel at precast structural concrete fabricator's option.
C. Limit water-soluble chloride ions to maximum percentage by weight of cement
permitted by ACI 318 (ACI 318M) or PCI MNL 116 when tested according to
ASTM C1218/C1218M.
D. Normal-Weight Concrete Mixtures: Proportion face and backup mixtures or full-depth
mixtures, at fabricator's option by either laboratory trial batch or field test data methods
according to ACI 211.1, with materials to be used on Project, to provide normal-weight
concrete with the following properties:
1. Compressive Strength (28 Days): 5000 psi (34.5 MPa).
2.Maximum Water-Cementitious Materials Ratio: 0.45.
E. Add air-entraining admixture at manufacturer's prescribed rate to result in concrete at
point of placement having an air content complying with PCI MNL 116.
F. When included in design mixtures, add other admixtures to concrete mixtures
according to manufacturer's written instructions.
G. Concrete Mix Adjustments: Concrete mix design adjustments may be proposed if
characteristics of materials, Project conditions, weather, test results, or other
circumstances warrant.
2.10 MOLD FABRICATION
A. Molds: Accurately construct molds, mortar tight, of sufficient strength to withstand
pressures due to concrete-placement operations and temperature changes and for
prestressing and detensioning operations. Coat contact surfaces of molds with release
agent before reinforcement is placed. Avoid contamination of reinforcement and
prestressing tendons by release agent.
B. Maintain molds to provide completed precast structural concrete units of shapes, lines,
and dimensions indicated, within fabrication tolerances specified.
1. Edge and Corner Treatment: Uniformly chamfered.
2.11 FABRICATION
A. Cast-in Anchors, Inserts, Plates, Angles, and Other Anchorage Hardware: Fabricate
anchorage hardware with sufficient anchorage and embedment to comply with design
requirements. Accurately position for attachment of loose hardware, and secure in place
during precasting operations. Locate anchorage hardware where it does not affect
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 9
position of main reinforcement or concrete placement.
1. Weld-headed studs and deformed bar anchors used for anchorage according to
AWS D1.1/D1.1M and AWS C5.4, "Recommended Practices for Stud Welding."
B. Furnish loose hardware items including steel plates, clip angles, seat angles, anchors,
dowels, cramps, hangers, and other hardware shapes for securing precast structural
concrete units to supporting and adjacent construction.
C. Reinforcement: Comply with recommendations in PCI MNL 116 for fabricating,
placing, and supporting reinforcement.
1. Clean reinforcement of loose rust and mill scale, earth, and other materials that
reduce or destroy the bond with concrete.
2. Accurately position, support, and secure reinforcement against displacement
during concrete-placement and consolidation operations. Completely conceal
support devices to prevent exposure on finished surfaces.
3. Place reinforcing steel to maintain at least 3/4-inch (19-mm) minimum concrete
cover. Increase cover requirements for reinforcing steel to 1-1/2 inches (38 mm)
when units are exposed to corrosive environment or severe exposure conditions.
Arrange, space, and securely tie bars and bar supports to hold reinforcement in
position while placing concrete. Direct wire tie ends away from finished, exposed
concrete surfaces.
4. Install welded wire fabric in lengths as long as practicable. Lap adjoining pieces
at least one full mesh spacing and wire tie laps, where required by design. Offset
laps of adjoining widths to prevent continuous laps in either direction.
D. Reinforce precast structural concrete units to resist handling, transportation, and
erection stresses and specified in-place loads.
E. Comply with requirements in PCI MNL 116 and in this Section for measuring, mixing,
transporting, and placing concrete. After concrete batching, no additional water may be
added.
F. Place concrete in a continuous operation to prevent cold joints or planes of weakness
from forming in precast concrete units.
G. Thoroughly consolidate placed concrete by vibration without dislocating or damaging
reinforcement and built-in items, and minimize pour lines, honeycombing, or entrapped
air voids on surfaces. Use equipment and procedures complying with PCI MNL 116.
1. Place self-consolidating concrete without vibration according to PCI TR-6,
"Interim Guidelines for the Use of Self-Consolidating Concrete in
Precast/Prestressed Concrete Institute Member Plants." Ensure adequate bond
between face and backup concrete, if used.
H. Comply with PCI MNL 116 procedures for hot- and cold-weather concrete placement.
I. Identify pickup points of precast structural concrete units and orientation in structure
with permanent markings, complying with markings indicated on Shop Drawings.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 10
Imprint or permanently mark casting date on each precast structural concrete unit on a
surface that does not show in finished structure.
J. Cure concrete, according to requirements in PCI MNL 116, by moisture retention
without heat or by accelerated heat curing using live steam or radiant heat and
moisture. Cure units until compressive strength is high enough to ensure that stripping
does not have an effect on performance or appearance of final product.
K. Discard and replace precast structural concrete units that do not comply with
requirements, including structural, manufacturing tolerance, and appearance, unless
repairs meet requirements in PCI MNL 116 and meet Architect's approval.
2.12 FABRICATION TOLERANCES
A. Fabricate precast structural concrete units to shapes, lines, and dimensions indicated so
each finished unit complies with PCI MNL 116 product dimension tolerances as well
as position tolerances for cast-in items.
2.13 COMMERCIAL FINISHES
A. Commercial Grade: Remove fins and protrusions larger than 1/8 inch (3 mm) and fill
holes larger than 1/2 inch (13 mm). Rub or grind ragged edges. Faces must have true,
well-defined surfaces. Air holes, water marks, and color variations are permitted. Limit
form joint offsets to 3/16 inch (5 mm).
B. Smooth, steel trowel finish unformed surfaces. Consolidate concrete, bring to proper
level with straightedge, float, and trowel to a smooth, uniform finish.
2.14 SOURCE QUALITY CONTROL
A. Testing Agency: In the event the Precaster is not PCI certified, Owner will engage a
qualified testing agency to evaluate precast structural concrete fabricator's
quality-control and testing methods.
1. Allow testing agency access to material storage areas, concrete production
equipment, concrete placement, and curing facilities. Cooperate with testing
agency and provide samples of materials and concrete mixtures as may be
requested for additional testing and evaluation.
.
B.Testing: Test and inspect precast structural concrete according to PCI MNL 116
requirements and ASTM C1610/C1610M, ASTM C1611/C1611M,
ASTM C1621/C1621M, and ASTM C1712/C1712M.
1. Test and inspect self-consolidating concrete according to PCI TR-6.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 11
C. Strength of precast structural concrete units is considered deficient if units fail to
comply with ACI 318 (ACI 318M) requirements for concrete strength.
D. If there is evidence that strength of precast concrete units may be deficient or may not
comply with ACI 318 (ACI 318M) requirements, employ a qualified testing agency to
obtain, prepare, and test cores drilled from hardened concrete to determine compressive
strength according to ASTM C42/C42M.
1. A minimum of three representative cores shall be taken from units of suspect
strength, from locations directed by Architect.
2. Test cores in an air-dry condition or, if units are wet under service conditions,
test cores after immersion in water in a wet condition.
3. Strength of concrete for each series of three cores is considered satisfactory if
average compressive strength is equal to at least 85 percent of 28-day design
compressive strength and no single core is less than 75 percent of 28-day design
compressive strength.
4. Report test results in writing on same day that tests are performed, with copies to
Architect, Contractor, and precast concrete fabricator. Test reports include the
following:
a. Project identification name and number.
b. Date when tests were performed.
c. Name of precast concrete fabricator.
d. Name of concrete testing agency.
e. Identification letter, name, and type of precast concrete unit(s) represented
by core tests; design compressive strength; type of break; compressive
strength at breaks, corrected for length-diameter ratio; and direction of
applied load to core in relation to horizontal plane of concrete as placed.
E. Patching: If core test results are satisfactory and precast structural concrete units
comply with requirements, clean and dampen core holes and solidly fill with same
precast concrete mixture that has no coarse aggregate, and finish to match adjacent
precast concrete surfaces.
F. Defective Units: Discard and replace precast structural concrete units that do not
comply with requirements, including strength, manufacturing tolerances, and color and
texture range. Chipped, spalled, or cracked units may be repaired, subject to Architect's
approval. Architect reserves the right to reject precast units that do not match approved
samples, sample panels, and mockups. Replace unacceptable units with precast
concrete units that comply with requirements.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine supporting structural frame or foundation and conditions for compliance with
requirements for installation tolerances, bearing surface tolerances, and other
conditions affecting performance of the Work.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 12
B. Proceed with installation only after unsatisfactory conditions have been corrected.
C. Do not install precast concrete units until supporting, cast-in-place concrete has
attained minimum allowable design compressive strength and until supporting steel or
other structure is structurally ready to receive loads from precast concrete units.
3.2 INSTALLATION
A. Install clips, hangers, bearing pads, and other accessories required for connecting
precast structural concrete units to supporting members and backup materials.
B. Erect precast structural concrete within specified allowable tolerances. Provide
temporary structural framing, shoring, and bracing as required to maintain position,
stability, and alignment of units until permanent connections are complete.
1. Install temporary steel or plastic spacing shims or bearing pads as precast
structural concrete units are being erected. Tack weld steel shims to each other to
prevent shims from separating.
2. Maintain horizontal and vertical joint alignment and uniform joint width as
erection progresses.
3. Remove projecting lifting devices and use plastic patch caps or sand-cement
grout to fill voids within recessed lifting devices flush with surface of adjacent
precast surfaces when recess is exposed.
C. Connect precast structural concrete units in position by bolting, welding, grouting, or as
otherwise indicated on Shop Drawings. Remove temporary shims, wedges, and spacers
as soon as practical after connecting and grouting are completed.
D. Field cutting of precast units is not permitted without approval of Architect.
E. Fasteners: Do not use drilled or powder-actuated fasteners for attaching accessory
items to precast concrete units.
F. Welding: Comply with applicable requirements in AWS D1.1/D1.1M and
AWS D1.4/D1.4M for welding, welding electrodes, appearance, quality of welds, and
methods used in correcting welding work.
1. Protect precast structural concrete units and bearing pads from damage by field
welding or cutting operations, and provide noncombustible shields as required.
2. Clean weld-affected steel surfaces with chipping hammer followed by brushing,
and reprime damaged painted surfaces.
3. Visually inspect welds and remove, reweld, or repair incomplete and defective
welds.
G. At bolted connections, use lock washers, tack welding, or other approved means to
prevent loosening of nuts after final adjustment.
1. Where slotted connections are used, verify bolt position and tightness. For sliding
connections, properly secure bolt but allow bolt to move within connection slot.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 13
2. For slip-critical connections, use one of the following methods to assure proper
bolt pretension:
a. Turn-of-Nut: According to RCSC's "Specification for Structural Joints
Using ASTM A325 or A 490 Bolts."
b. Calibrated Wrench: According to RCSC's "Specification for Structural
Joints Using ASTM A325 or A 490 Bolts."
c. Twist-off Tension Control Bolt: ASTM F3125/F3125M, Grade 1852.
d. Direct-Tension Control Bolt: ASTM F3125/F3125M, Grade 1852.
H. Grouting or Dry-Packing Connections and Joints: Grout connections and joints and
open spaces at keyways, connections, and joints where required or indicated on Shop
Drawings. Retain flowable grout in place until hard enough to support itself.
Alternatively, pack spaces with stiff dry-pack grout material, tamping until voids are
completely filled.
1. Place grout and finish smooth, level, and plumb with adjacent concrete surfaces.
2. Fill joints completely without seepage to other surfaces.
3. Trowel top of grout joints on roofs smooth and uniform.
4. Promptly remove grout material from exposed surfaces before it affects finishes
or hardens.
5. Keep grouted joints damp for not less than 24 hours after initial set.
3.3 ERECTION TOLERANCES
A. Erect precast structural concrete units level, plumb, square, and in alignment without
exceeding the noncumulative erection tolerances of PCI MNL 135.
3.4 FIELD QUALITY CONTROL
A. Special Inspections: Owner will engage a qualified special inspector to perform the
following special inspections:
1. Erection of precast structural concrete members.
B. Testing Agency: Owner will engage a qualified testing agency to perform tests and
inspections.
C. Visually inspect field welds and test according to ASTM E165 or to ASTM E709 and
ASTM E1444. High-strength bolted connections are subject to inspections.
D. Testing agency will report test results promptly and in writing to Contractor and
Architect.
E. Repair or remove and replace work where tests and inspections indicate that it does not
comply with specified requirements.
Received by DiMarco 02/25/2021
Park Grove – Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
PRECAST STRUCTURAL CONCRETE 034100 - 14
F. Additional testing and inspecting, at Contractor's expense, shall be performed to
determine compliance of replaced or additional work with specified requirements.
G. Prepare test and inspection reports.
3.5 REPAIRS
A. Repair precast structural concrete units if permitted by Architect.
1. Repairs may be permitted if structural adequacy, serviceability, durability, and
appearance of units have not been impaired.
B. Mix patching materials and repair units so cured patches blend with color, texture, and
uniformity of adjacent exposed surfaces and show no apparent line of demarcation
between original and repaired work, when viewed in typical daylight illumination from
a distance of 20 feet (6 m).
C. Wire brush, clean, and paint damaged prime-painted components with same type of
shop primer.
D. Remove and replace damaged precast structural concrete units that cannot be repaired
or when repairs do not comply with requirements as determined by Architect.
3.6 CLEANING
A. Clean mortar, plaster, fireproofing, weld slag, and other deleterious material from
concrete surfaces and adjacent materials immediately.
B. Clean exposed surfaces of precast concrete units after erection and completion of joint
treatment to remove weld marks, other markings, dirt, and stains.
1. Perform cleaning procedures, if necessary, according to precast concrete
fabricator's written recommendations. Protect other work from staining or
damage due to cleaning operations.
2. Do not use cleaning materials or processes that could change the appearance of
exposed concrete finishes or damage adjacent materials.
END OF SECTION 034100
Received by DiMarco 02/25/2021