HomeMy WebLinkAboutCAST-IN-PLACE CONCRETE_Rev_0Five Sullivan Brothers CC Kitchen Plmb Improvements 03 30 00
City of Waterloo CAST-IN-PLACE CONCRETE
INVISION #16021 1 of 10
SECTION 03 30 00
CAST-IN-PLACE CONCRETE
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Concrete formwork.
B. Floors and slabs on grade.
C. Concrete foundations and anchor bolts for pre-engineered building.
D. Concrete reinforcement.
E. Joint devices associated with concrete work.
1.02 RELATED REQUIREMENTS
A. Section 07 21 00 - Thermal Insulation: Rigid insulation at foundation wall perimeters and underneath
slabs on grade.
B. Section 07 92 00 - Joint Sealants: Products and installation for sealants and joint fillers for saw cut joints
and isolation joints in slabs.
1.03 REFERENCE STANDARDS
A. ACI 117 - Standard Specifications for Tolerances for Concrete Construction and Materials; 2010
(Reapproved 2015).
B. ACI 211.1 - Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete;
1991 (Reapproved 2009).
C. ACI 301 - Specifications for Structural Concrete; 2016.
D. ACI 302.1R - Guide to Concrete Floor and Slab Construction; 2015.
E. ACI 304R - Guide for Measuring, Mixing, Transporting, and Placing Concrete; 2000 (Reapproved 2009).
F. ACI 305R - Guide to Hot Weather Concreting; 2010.
G. ACI 306R - Guide to Cold Weather Concreting; 2016.
H. ACI 308R - Guide to External Curing of Concrete; 2016.
I. ACI 318 - Building Code Requirements for Structural Concrete and Commentary; 2014 (Errata 2017).
J. ACI 347R - Guide to Formwork for Concrete; 2014.
K. ASTM A615/A615M - Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete
Reinforcement; 2016.
L. ASTM A1064/A1064M - Standard Specification for Carbon-Steel Wire and Welded Wire Reinforcement,
Plain and Deformed, for Concrete; 2017.
M. ASTM C1602/C1602M - Standard Specification for Mixing Water Used in the Production of Hydraulic
Cement Concrete; 2012.
N. ASTM C33/C33M - Standard Specification for Concrete Aggregates; 2016, with Editorial Revision (2016).
O. ASTM C94/C94M - Standard Specification for Ready-Mixed Concrete; 2017a.
P. ASTM C109/C109M - Standard Test Method for Compressive Strength of Hydraulic Cement Mortars
(Using 2-in. or (50-mm) Cube Specimens); 2016a.
Q. ASTM C143/C143M - Standard Test Method for Slump of Hydraulic-Cement Concrete; 2015a.
R. ASTM C150/C150M - Standard Specification for Portland Cement; 2018.
S. ASTM C171 - Standard Specification for Sheet Materials for Curing Concrete; 2016.
T. ASTM C173/C173M - Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric
Method; 2016.
U. ASTM C260/C260M - Standard Specification for Air-Entraining Admixtures for Concrete; 2010a
(Reapproved 2016).
V. ASTM C309 - Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete;
2011.
W. ASTM C330/C330M - Standard Specification for Lightweight Aggregates for Structural Concrete; 2017a.
X. ASTM C494/C494M - Standard Specification for Chemical Admixtures for Concrete; 2017.
Five Sullivan Brothers CC Kitchen Plmb Improvements 03 30 00
City of Waterloo CAST-IN-PLACE CONCRETE
INVISION #16021 2 of 10
Y. ASTM C618 - Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in
Concrete; 2015.
Z. ASTM C685/C685M - Standard Specification for Concrete Made by Volumetric Batching and Continuous
Mixing; 2014.
AA. ASTM C881/C881M - Standard Specification for Epoxy-Resin-Base Bonding Systems for Concrete; 2015.
AB. ASTM C1059/C1059M - Standard Specification for Latex Agents for Bonding Fresh to Hardened
Concrete; 2013.
AC. ASTM C1107/C1107M - Standard Specification for Packaged Dry, Hydraulic-Cement Grout (Nonshrink);
2014a.
AD. ASTM C1240 - Standard Specification for Silica Fume Used in Cementitious Mixtures; 2015.
AE. ASTM C1315 - Standard Specification for Liquid Membrane-Forming Compounds Having Special
Properties for Curing and Sealing Concrete; 2011.
AF. ASTM D1752 - Standard Specification for Preformed Sponge Rubber Cork and Recycled PVC Expansion
Joint Fillers for Concrete Paving and Structural Construction; 2004a (Reapproved 2013).
AG. ASTM E1155 - Standard Test Method for Determining F(F) Floor Flatness and F(L) Floor Levelness
Numbers; 2014.
AH. ASTM E1643 - Standard Practice for Selection, Design, Installation and Inspection of Water Vapor
Retarders Used in Contact with Earth or Granular Fill Under Concrete Slabs; 2011 (Reapproved 2017).
AI. ASTM E1745 - Standard Specification for Plastic Water Vapor Retarders Used in Contact with Soil or
Granular Fill under Concrete Slabs; 2017.
AJ. NSF 61 - Drinking Water System Components - Health Effects; 2017.
AK. NSF 372 - Drinking Water System Components - Lead Content; 2016.
1.04 SUBMITTALS
A. Steel Reinforcement Shop Drawings: Placing drawings that detail fabrication, bending, and placement.
Include bar sizes, lengths, material, grade, bar schedules, stirrup spacing, bent bar diagrams, bar
arrangement, splices and laps, mechanical connections, tie spacing, hoop spacing and supports for
concrete reinforcement.
1.05 QUALITY ASSURANCE
A. Perform work of this section in accordance with ACI 301 and ACI 318.
1. Maintain one copy of each document on site.
B. Follow recommendations of ACI 305R when concreting during hot weather.
C. Follow recommendations of ACI 306R when concreting during cold weather.
D. Manufacturer Qualifications: A firm experienced in manufacturing ready-mixed concrete products and
that complies with ASTM C94/C94M requirements for production facilities and equipment.
E. Owner will preform concrete slump testing.
F. Owner’s Testing/Inspection agency shall view installation of formwork and reinforcement, but prior to
placement of concrete. Unsatisfactory installation shall result in reinstallation/repair in accordance with
manufacturer’s instructions at no additional cost to Owner.
G. Owner's testing agency will preform concrete compression testing.
H. Architect/Owner shall be notified and allowed to view installation of underslab vapor retarder after
installation of formwork and reinforcement, but prior to placement of concrete. Unsatisfactory installation
shall result in reinstallation/repair in accordance with manufacturer’s instructions at no additional cost to
Owner.
PART 2 PRODUCTS
2.01 FORMWORK
A. Formwork Design and Construction: Comply with guidelines of ACI 347R to provide formwork that will
produce concrete complying with tolerances of ACI 117.
B. Form Materials: Contractor's choice of standard products with sufficient strength to withstand hydrostatic
head without distortion in excess of permitted tolerances.
1. Form Facing for Exposed Finish Concrete: Contractor's choice of materials that will provide
smooth, stain-free final appearance.
Five Sullivan Brothers CC Kitchen Plmb Improvements 03 30 00
City of Waterloo CAST-IN-PLACE CONCRETE
INVISION #16021 3 of 10
2.02 REINFORCEMENT MATERIALS
A. Reinforcing Steel: ASTM A615/A615M, Grade 60 (60,000 psi).
1. Type: Deformed billet-steel bars.
2. Finish: Unfinished, unless otherwise indicated.
B. Steel Welded Wire Reinforcement (WWR): Galvanized, plain type, ASTM A1064/A1064M.
1. Form: Flat sheets or coiled rolls.
2. WWR Style: As indicated on drawings.
C. Reinforcement Accessories:
1. Tie Wire: Annealed, minimum 16 gage, 0.0508 inch.
2. Chairs, Bolsters, Bar Supports, Spacers: Sized and shaped for adequate support of reinforcement
during concrete placement.
3. Provide stainless steel, galvanized, plastic, or plastic coated steel components for placement within
1-1/2 inches of weathering surfaces.
2.03 CONCRETE MATERIALS
A. Cement: ASTM C150/C150M, Type III - High Early Strength Portland type.
1. Acquire cement for entire project from same source.
B. Fine and Coarse Aggregates: ASTM C33/C33M.
1. Acquire aggregates for entire project from same source.
C. Fly Ash: ASTM C618, Class C.
D. Calcined Pozzolan: ASTM C618, Class N.
E. Silica Fume: ASTM C1240, proportioned in accordance with ACI 211.1.
F. Water: ASTM C1602/C1602M; clean, potable, and not detrimental to concrete.
2.04 ADMIXTURES
A. Do not use chemicals that will result in soluble chloride ions in excess of 0.1 percent by weight of cement.
B. Air Entrainment Admixture: ASTM C260/C260M.
1. Products: “MB-VR” manufactured by BASF; “Air Mix” manufactured by Euclid Chemical Company;
“Darex Series” manufactured by W. R. Grace and Co; or approved equivalent.
C. High Range Water Reducing and Retarding Admixture: ASTM C494/C494M Type G.
1. Products: “Glenium Series” manufactured by BASF; “Eucon 537” manufactured by Euclid Chemical
Company; “Daracem Series” manufactured by W. R. Grace and Co; or approved equivalent.
D. High Range Water Reducing Admixture: ASTM C494/C494M Type F.
1. Products: “Rheobuild 1000” manufactured by BASF; “Eucon 37” manufactured by Euclid Chemical
Company; “Daracem Series” manufactured by W. R. Grace and Co; or approved equivalent.
E. Water Reducing and Accelerating Admixture: ASTM C494/C494M Type C or Type E.
1. Products: “Pozzolith NC 534” manufactured by BASF; “Accelguard 80” manufactured by Euclid
Chemical Company; “Daraset Series” manufactured by W. R. Grace and Co; or approved
equivalent.
F. Water Reducing Admixture: ASTM C494/C494M Type A.
1. Products: “Pozzolith Series” manufactured by BASF; “Eucon Series” manufactured by Euclid
Chemical Company; “WRDA Hycol” manufactured by W. R. Grace and Co; or approved equivalent.
G. Calcium chloride is not permitted.
2.05 ACCESSORY MATERIALS
A. Underslab Vapor Retarder: Sheet material complying with ASTM E1745, Class A; stated by
manufacturer as suitable for installation in contact with soil or granular fill under concrete slabs. The use
of single ply polyethylene is prohibited.
1. Installation: Comply with ASTM E1643.
2. Accessory Products: Vapor retarder manufacturer's recommended tape, adhesive, mastic,
prefabricated boots, etc., for sealing seams and penetrations.
3. Manufacturers:
a. Fortifiber Building Systems Group; Moistop Ultra 15: www.fortifiber.com.
b. Stego Industries, LLC; 15 mil Class A: www.stegoindustries.com.
c. W. R. Meadows, Inc; PERMINATOR Class A - 15 mils: www.wrmeadows.com.
B. Non-Shrink Cementitious Grout: Premixed compound consisting of non-metallic aggregate, cement,
water reducing and plasticizing agents.
Five Sullivan Brothers CC Kitchen Plmb Improvements 03 30 00
City of Waterloo CAST-IN-PLACE CONCRETE
INVISION #16021 4 of 10
1. Minimum Compressive Strength at 48 Hours, ASTM C109/C109M: 2,000 pounds per square inch.
2. Minimum Compressive Strength at 28 Days, ASTM C109/C109M: 7,000 pounds per square inch.
2.06 BONDING AND JOINTING PRODUCTS
A. Latex Bonding Agent: Non-redispersable acrylic latex, complying with ASTM C1059/C1059M, Type II.
B. Epoxy Bonding System:
1. Complying with ASTM C881/C881M and of Type required for specific application.
C. Waterstops: Bentonite and butyl rubber, complying with NSF 61 and NSF 372.
1. Product: Carlisle, MiraSTOP; CETCO Volclay Waterstop-RX; Greenstreak, Swellstop; Henry
Company, Hydro-Flex; or approved equivalent.
D. Slab Isolation Joint Filler: 1/2 inch thick, height equal to slab thickness, with removable top section that
will form 1/2 inch deep sealant pocket after removal.
2.07 CURING MATERIALS
A. Moisture-Retaining Sheet: ASTM C171.
1. Curing paper, regular.
2. Polyethylene film, white opaque, minimum nominal thickness of 4 mil, 0.004 inch.
3. White-burlap-polyethylene sheet, weighing not less than 3.8 ounces per square yard.
B. Liquid Curing Compound: ASTM C309, Type 1, clear or translucent.
1. Curing compound is acceptable only for exterior slabs.
C. Concrete Sealer: Clear, waterborne; oil, water, and stain repellant; odorless; colorless; that penetrates
and seals concrete surfaces.
1. Product:
a. Prosoco Consolideck “Concrete Protector”.
2.08 CONCRETE MIX DESIGN
A. Proportioning Normal Weight Concrete: Comply with ACI 211.1 recommendations.
B. Concrete Strength: Establish required average strength for each type of concrete on the basis of field
experience or trial mixtures, as specified in ACI 301.
1. For trial mixtures method, employ independent testing agency acceptable to Design Professional
for preparing and reporting proposed mix designs.
C. Admixtures: Add acceptable admixtures as recommended in ACI 211.1 and at rates recommended or
required by manufacturer.
D. Normal Weight Concrete:
1. Refer to Structural Drawings for concrete strengths and properties.
2. Fly Ash Content: Maximum 15 percent of cementitious materials by weight.
3. Calcined Pozzolan Content: Maximum 10 percent of cementitious materials by weight.
4. Water-Cement Ratio: Maximum 45 percent by weight.
5. Total Air Content: 6 percent, determined in accordance with ASTM C173/C173M.
6. Maximum Slump: 3 inches.
7. Maximum Aggregate Size: 5/8 inch.
8. Maximum Aggregate Size: Maximum aggregate size not to exceed 1/5 of the narrowest dimension
between the sides of the forms, one-third of the depth of slabs, nor three-quarters of the minimum
clear spacing between individual reinforcing bars or prestressing tendons. Comply with
requirements of ACI 318.
2.09 MIXING
A. On Project Site: Mix in drum type batch mixer, complying with ASTM C685/C685M. Mix each batch not
less than 1-1/2 minutes and not more than 5 minutes.
B. Transit Mixers: Comply with ASTM C94/C94M.
C. Adding Water: If concrete arrives on-site with slump less than suitable for placement, do not add water
that exceeds the maximum water-cement ratio or exceeds the maximum permissible slump.
D. Do not add water to mix on site beyond that amount indicated on approved mix design.
PART 3 EXECUTION
3.01 EXAMINATION
A. Verify lines, levels, and dimensions before proceeding with work of this section.
Five Sullivan Brothers CC Kitchen Plmb Improvements 03 30 00
City of Waterloo CAST-IN-PLACE CONCRETE
INVISION #16021 5 of 10
3.02 PREPARATION
A. Formwork: Comply with requirements of ACI 301. Design and fabricate forms to support all applied
loads until concrete is cured, and for easy removal without damage to concrete.
B. Coordinate placement of embedded items with erection of concrete formwork and placement of form
accessories.
C. Where new concrete is to be bonded to previously placed concrete, prepare existing surface by cleaning
and applying bonding agent in according to bonding agent manufacturer's instructions.
1. Use epoxy bonding system for bonding to damp surfaces, for structural load-bearing applications,
and where curing under humid conditions is required.
2. Use latex bonding agent only for non-load-bearing applications.
D. In locations where new concrete is doweled to existing work, drill holes in existing concrete, insert steel
dowels and pack solid with non-shrink grout.
E. Interior Slabs on Grade: Install vapor retarder under interior slabs on grade. Lap joints minimum 6
inches. Seal joints, seams and penetrations watertight with manufacturer's recommended products and
follow manufacturer's written instructions. Repair damaged vapor retarder before covering.
3.03 INSTALLING REINFORCEMENT AND OTHER EMBEDDED ITEMS
A. Comply with requirements of ACI 301. Clean reinforcement of loose rust and mill scale, and accurately
position, support, and secure in place to achieve not less than minimum concrete coverage required for
protection.
B. Install welded wire reinforcement in maximum possible lengths, and offset end laps in both directions.
Splice laps with tie wire.
3.04 PLACING CONCRETE
A. Place concrete in accordance with ACI 304R.
B. Place concrete for floor slabs in accordance with ACI 302.1R.
C. Maintain records of concrete placement. Record date, location, quantity, air temperature, and test
samples taken.
D. Ensure reinforcement, inserts, waterstops, embedded parts, and formed construction joint devices will not
be disturbed during concrete placement.
E. Place concrete continuously without construction (cold) joints wherever possible; where construction
joints are necessary, before next placement prepare joint surface by removing laitance and exposing the
sand and sound surface mortar, by sandblasting or high-pressure water jetting.
F. Finish floors level and flat, unless otherwise indicated, within the tolerances specified below.
3.05 SLAB JOINTING
A. Locate joints as indicated on drawings.
B. Anchor joint fillers and devices to prevent movement during concrete placement.
C. Isolation Joints: Use preformed joint filler with removable top section for joint sealant, total height equal
to thickness of slab, set flush with top of slab.
3.06 FORMWORK
A. Design, erect, shore, brace and maintain formwork, according to ACI 301, to support vertical, lateral,
static, dynamic loads and construction loads that might be applied, until concrete structure can support
such loads.
B. Construct formwork so concrete members and structures are of size, shape, alignment, elevation and
position indicated, within tolerance limits of ACI 117.
C. Limit concrete surface irregularities, designated by ACI 347R as abrupt or gradual, as follows:
1. Class A, 1/8 inch for smooth-formed finished surfaces ("Architectural" and exposed to view).
2. Class C, 1/2 inch for rough-formed finished surfaces (concealed from view).
D. Construct forms tight enough to prevent loss of concrete mortar.
E. Fabricate forms for easy removal without hammering or prying against concrete surfaces. Provide crush
or wrecking plates where stripping may damage cast concrete surfaces.
1. Seal form joints and penetrations at form ties with form joint tape or form joint sealant to prevent
cement paste leakage.
2. Do not use dented or rust-stained steel form-facing material on surfaces exposed in the finished
work.
Five Sullivan Brothers CC Kitchen Plmb Improvements 03 30 00
City of Waterloo CAST-IN-PLACE CONCRETE
INVISION #16021 6 of 10
F. Set edge forms, bulkheads and intermediate screed strips for slabs to achieve required elevations and
slopes in finished concrete surfaces. Provide and secure units to support screed strips; use strike-off
templates or compacting-type screeds.
G. Provide temporary openings for cleanouts and inspection ports where interior area of formwork is
inaccessible. Close openings with panels tightly fitted to forms and securely braced to prevent loss of
concrete mortar. Locate temporary openings in forms at inconspicuous locations.
H. Clean forms and adjacent surfaces to receive concrete. Remove chips, wood, sawdust, dirt, and other
debris just before placing concrete.
I. Verify that forms are clean and free of rust before applying release agent.
J. Retighten forms and bracing before placing concrete, as required, to prevent mortar leaks and maintain
proper alignment.
K. Coat contact surfaces of forms with form-release agent, according to manufacturer's written instructions,
before placing reinforcement.
3.07 REMOVING AND REUSING FORMS
A. General: Formwork, for sides of beams, walls, columns and similar parts of the Work, that does not
support weight of concrete may be removed after cumulatively curing at not less than 50 deg F for 24
hours after placing concrete provided concrete is hard enough to not be damaged by form-removal
operations and provided curing and protection operations are maintained.
B. Leave formwork, for slabs and other structural elements, that supports weight of concrete in place until
concrete has achieved the following:
1. At least 70 percent of 28 day design compressive strength. Concrete should be hard enough to not
have surface damaged when removing formwork.
C. When forms are reused, clean surfaces, remove fins and laitance, and tighten to close joints. Align and
secure joints to avoid offsets. Do not use patched forms for exposed concrete surfaces unless approved
by Architect. Apply new form-release agent.
3.08 INSTALLING REINFORCEMENT
A. Comply with requirements of ACI 301. Clean reinforcement of loose rust and mill scale, and accurately
position, support, and secure in place to achieve not less than minimum concrete coverage required for
protection.
B. Clean reinforcement of loose rust and mill scale, earth, ice and other foreign materials.
C. Accurately position, support and secure reinforcement against displacement. Locate and support
reinforcement with bar supports to maintain minimum concrete cover. Do not tack weld crossing
reinforcing bars.
D. Install welded wire fabric in longest practicable lengths on bar supports spaced at a maximum of 36
inches each way to minimize sagging. Lap edges and ends of adjoining sheets at least one mesh
spacing. Offset laps of adjoining sheet widths to prevent continuous laps in either direction. Lace
overlaps with wire.
E. Verify that anchors, seats, plates, reinforcement, and other items to be cast into concrete are accurately
placed, positioned securely, and will not interfere with concrete placement.
3.09 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. Use Setting Drawings, templates, diagrams,
instructions, and directions furnished with items to be embedded.
B. Waterstops: Install in construction joints and at other locations indicated to form a continuous diaphragm.
Install by bonding or mechanically fastening and firmly pressing into place, according to manufacturer's
written instructions. Install in longest lengths practicable. Field fabricate joints in waterstops according to
manufacturer's written instructions.
3.10 PLACING CONCRETE
A. Do not add water to concrete during delivery or at Project site, except as follows: If concrete batch ticket
indicates that the amount of water in the mix design was not fully added at the plant, then that amount of
water may be added under the direct supervision of the Owner's testing agency representative.
B. Place concrete in accordance with ACI 304R.
C. Place concrete for floor slabs in accordance with ACI 302.1R.
D. Notify Architect not less than 24 hours prior to commencement of placement operations.
Five Sullivan Brothers CC Kitchen Plmb Improvements 03 30 00
City of Waterloo CAST-IN-PLACE CONCRETE
INVISION #16021 7 of 10
E. Ensure reinforcement and embedded parts will not be disturbed during concrete placement.
F. Repair underslab vapor retarder damaged during placement of concrete reinforcing. Repair with vapor
retarder material; lap over damaged areas minimum 6 inches and seal watertight.
G. Separate slabs on grade from vertical surfaces with joint filler.
H. Maintain records of concrete placement. Record date, location, quantity, air temperature, and test
samples taken.
I. Deposit concrete continuously in one layer or in horizontal layers of such thickness that no new concrete
will be placed on concrete that has hardened enough to cause seams or planes of weakness. If a section
cannot be placed continuously, provide construction joints as indicated. Deposit concrete to avoid
segregation.
J. Deposit concrete in forms in horizontal layers no deeper than 24 inches and in a manner to avoid inclined
construction joints. Place each layer while preceding layer is still plastic, to avoid cold joints.
1. Consolidate placed concrete with mechanical vibrating equipment. Use equipment and procedures
for consolidating concrete recommended by ACI 301.
2. Do not use vibrators to transport concrete inside forms. Insert and withdraw vibrators vertically at
uniformly spaced locations no farther than the visible effectiveness of the vibrator. Place vibrators
to rapidly penetrate placed layer and at least 6 inches into preceding layer. Do not insert vibrators
into lower layers of concrete that have begun to lose plasticity. At each insertion, limit duration of
vibration to time necessary to consolidate concrete and complete embedment of reinforcement and
other embedded items without causing mix constituents to segregate.
K. 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. Consolidate concrete during placement operations so concrete is thoroughly worked around
reinforcement and other embedded items and into corners.
2. Maintain reinforcement in position on chairs during concrete placement.
3. Screed slab surfaces with a straightedge and strike off to correct elevations.
4. Slope surfaces uniformly to drains where required.
5. Begin initial floating using bull floats or derbies to form a uniform and open-textured surface plane,
free of humps or hollows, before excess moisture or rrrrrrrrrrrrrrrr appears on the surface. Do not
further disturb slab surfaces before starting finishing operations.
L. Do not interrupt successive placement; do not permit cold joints to occur.
M. Cold-Weather Placement: Comply with ACI 306.1 and as follows. Protect concrete work from physical
damage or reduced strength that could be caused by frost, or low temperatures.
N. Hot-Weather Placement: Place concrete according to recommendations in ACI 305R and as follows,
when hot-weather conditions exist:
O. Saw cut joints between 4 and 12 hours after placing. Use 3/16 inch thick blade, cut into 1/4 depth of slab
thickness; 2 inch minimum depth of cut. Do not saw cut topping slabs on precast.
P. Finish surfaces to the following tolerances, according to ASTM E1155, for a randomly trafficked floor
surface:
1. Maximum Variation of Surface Flatness:
a. Exposed Concrete Floors: 1/4 inch in 10 feet.
b. Under Seamless Resilient Flooring: 1/4 inch in 10 feet.
c. Under Carpeting: 1/4 inch in 10 feet.
OR
1. Specified overall values of flatness, F(F) 35; and of levelness, F(L) 25; with minimum local values of
flatness, F(F) 21; and of levelness, F(L) 15; for slabs-on-grade.
2. Specified overall values of flatness, F(F) 25; with minimum local values of flatness, F(F) 15; for
suspended slabs.
3.11 JOINTS
A. General: Construct joints true to line with faces perpendicular to surface plane of concrete.
B. Install joint devices in accordance with manufacturer's instructions.
C. Construction Joints: Install so strength and appearance of concrete are not impaired, at locations
indicated or as approved by Architect.
1. Place joints perpendicular to main reinforcement. Continue reinforcement across construction
joints, unless otherwise indicated. Do not continue reinforcement through sides of strip placements
of floors and slabs.
Five Sullivan Brothers CC Kitchen Plmb Improvements 03 30 00
City of Waterloo CAST-IN-PLACE CONCRETE
INVISION #16021 8 of 10
2. Locate joints for slabs in the middle third of spans.
3. Use a bonding agent at locations where fresh concrete is placed against hardened or partially
hardened concrete surfaces unless noted otherwise.
D. Contraction Joints in Slabs-on-Grade: Form weakened-plane contraction joints, sectioning concrete into
areas as indicated. Construct contraction joints for a depth as shown on drawings, as follows:
1. Sawed Joints: Form contraction joints with power saws equipped with shatterproof abrasive or
diamond-rimmed blades. Cut 1/8 inch wide joints into concrete when cutting action will not tear,
abrade or otherwise damage surface and before concrete develops random contraction cracks.
E. Isolation Joints in Slabs-on-Grade: 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. Extend joint fillers full width and 1/2 inch less than full depth of joint. Protect top edge of joint filler
during concrete placement with plastic or other temporary preformed cap to permit installation of
joint sealant. Remove protective cap after concrete has been placed on both sides of joint and
install sealant per requirements of Section 07 92 00.
2. Install joint-filler strips in lengths as long as practicable. Where more than one length is required,
lace or clip sections together.
3.12 CONCRETE FINISHING
A. Repair surface defects, immediately after removing formwork.
B. Exposed Form 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 defective areas.
Remove fins and other projections exceeding 1/8 inch in height.
C. Unexposed Form Finish: Rub down or chip off fins or other raised areas 1/4 inch or more in height.
D. Concrete Slabs: Finish to requirements of ACI 302.1R, and as follows:
1. All Surfaces: "Steel trowel" as described in ACI 301.1R, minimizing burnish marks and other
appearance defects.
E. In areas with floor drains, maintain floor elevation at walls; pitch surfaces uniformly to drains at 1:100
nominal.
3.13 CURING AND PROTECTION
A. Comply with requirements of ACI 308R. Immediately after placement, protect concrete from premature
drying, excessively hot or cold temperatures, and mechanical injury.
B. Maintain concrete with minimal moisture loss at relatively constant temperature for period necessary for
hydration of cement and hardening of concrete.
1. Normal Concrete: Not less than seven (7) days.
2. High Early Strength Concrete: Not less than four (4) days.
C. Curing compounds shall only be permitted on exterior slabs.
D. Surfaces Not in Contact with Forms: Cure concrete according to ACI 308.1, by one or a combination of
the following methods:
1. Moisture Curing: Keep surfaces continuously moist for not less than seven days with the following
materials:
a. Water.
b. Continuous water-fog spray.
c. Absorptive cover, water saturated and kept continuously wet. Cover concrete surfaces and
edges with 12 inch lap over adjacent absorptive covers.
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. Cure for not less than seven (7) days. Immediately repair
any holes or tears during curing period using cover material and waterproof tape.
a. Use moisture-retaining covers to cure concrete surfaces to receive floor coverings and
penetrating liquid floor treatments
3. Curing Compound: Apply uniformly in continuous operation by power spray or roller according to
manufacturer's written instructions. Recoat areas subjected to heavy rainfall within three hours
after initial application. Maintain continuity of coating and repair damage during curing period.
a. Removal: After curing period has elapsed, remove curing compound without damaging
concrete surfaces by method recommended by curing compound manufacturer.
Five Sullivan Brothers CC Kitchen Plmb Improvements 03 30 00
City of Waterloo CAST-IN-PLACE CONCRETE
INVISION #16021 9 of 10
3.14 FLOOR HARDENER
A. Provide floor hardener at concrete slabs not scheduled for floor covering: After slab has cured, clean and
prepare slab according to hardener manufacturer’s instructions. Apply water-diluted hardener in two
coats per manufacturer's instructions, allowing 24 hours between coats. Flush and wash floors according
to floor hardener manufacturer’s instructions.
3.15 PROTECTION
A. Do not permit traffic over unprotected concrete floor surface until fully cured.
END OF SECTION