37 Parking Lot Concrete Specs.pdf

CONCRETE FORMING AND

ACCESSORIES

PRQE172475 Repair Bldg. 37 Parking Lot

SECTION 031000 - CONCRETE FORMING AND ACCESSORIES

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Formwork for cast-in place concrete, with shoring, bracing and anchorage.

B. Form accessories.

C. Form stripping.

1.2 RELATED REQUIREMENTS

A. Section 032000 - Concrete Reinforcing.

B. Section 033000 - Cast-in-Place Concrete.

1.3 REFERENCE STANDARDS

A. ACI 117 - Standard Specifications for Tolerances for Concrete Construction and Materials;

2010.

B. ACI 347 - Guide to Formwork for Concrete; American Concrete Institute; 2004.

PART 2 PRODUCTS

2.1 FORMWORK - GENERAL

A. Provide concrete forms, accessories, shoring, and bracing as required to accomplish cast-in-place concrete work.

B. Design and construct to provide resultant concrete that conforms to design with respect to shape, lines, and dimensions.

C. Comply with applicable state and local codes with respect to design, fabrication, erection, and removal of formwork.

D. Comply with relevant portions of ACI 347.

2.2 WOOD FORM MATERIALS

A. Form Materials: At the discretion of the Contractor.

2.3 REMOVABLE PREFABRICATED FORMS

A. Preformed Steel Forms: Minimum 16 gage, 0.0598 inch thick, matched, tight fitting, stiffened to support weight of concrete without deflection detrimental to tolerances and appearance of finished surfaces.

B. Preformed Plastic Forms: Thermoplastic polystyrene form liner, tight fitting, stiffened to support weight of concrete without deflection detrimental to tolerances and appearance of finished surfaces.

C. Glass Fiber Fabric Reinforced Plastic Forms: Matched, tight fitting, stiffened to support weight of concrete without deflection detrimental to tolerances and appearance of finished concrete surfaces.

2.4 FORMWORK ACCESSORIES

A. Form Release Agent: Capable of releasing forms from hardened concrete without staining or

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CONCRETE FORMING AND

ACCESSORIES

discoloring concrete or forming bug holes and other surface defects, compatible with concrete and form materials, and not requiring removal for satisfactory bonding of coatings to be applied.

1. Composition: Colorless reactive, mineral oil-based, soy-based, or vegetable-oil based compound.

2. Do not use materials containing diesel oil or petroleum-based compounds.

3. VOC Content: In compliance with applicable local, State, and federal regulations.

PART 3 EXECUTION

3.1 EXAMINATION

A. Verify lines, levels and centers before proceeding with formwork. Ensure that dimensions agree with drawings.

3.2 EARTH FORMS

A. Hand trim sides and bottom of earth forms. Remove loose soil prior to placing concrete.

3.3 ERECTION - FORMWORK

A. Erect formwork, shoring and bracing to achieve design requirements, in accordance with requirements of ACI 301.

B. Provide bracing to ensure stability of formwork. Shore or strengthen formwork subject to overstressing by construction loads.

3.4 APPLICATION - FORM RELEASE AGENT

A. Apply form release agent on formwork in accordance with manufacturer's recommendations.

3.5 FORMWORK TOLERANCES

A. Construct formwork to maintain tolerances required by ACI 117, unless otherwise indicated.

3.6 FORM REMOVAL

A. Do not remove forms or bracing until concrete has gained sufficient strength to carry its own weight and imposed loads.

END OF SECTION

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CONCRETE REINFORCING

SECTION 032000 - CONCRETE REINFORCING

GENERAL

1.1 SECTION INCLUDES

A. Reinforcing steel for cast-in-place concrete.

B. Supports and accessories for steel reinforcement.

A. Section 031000 - Concrete Forming and Accessories.

B. Section 033000 - Cast-in-Place Concrete.

A. ACI SP-66 - ACI Detailing Manual; American Concrete Institute International; 2004.

B. ASTM A615/A615M - Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete

Reinforcement; 2014.

C. ASTM A1064/A1064M - Standard Specification for Carbon-Steel Wire and Welded Wire

Reinforcement, Plain and Deformed, for Concrete; 2013.

D. CRSI (DA4) - Manual of Standard Practice; Concrete Reinforcing Steel Institute; 2009.

1.4 QUALITY ASSURANCE

A. Perform work of this section in accordance with ACI 301.

2.1 REINFORCEMENT

A. Reinforcing Steel: ASTM A615/A615M, Grade 60 - 60,000 psi.

B. Stirrup Steel: ASTM A1064/A1064M steel wire, unfinished.

C. Reinforcement Accessories:

1. Tie Wire: Annealed, minimum 16 gage, 0.0508 inch.

2. Chairs, Bolsters, Bar Supports, and Spacers: Sized and shaped for adequate support of reinforcement during concrete placement.

3.1 PLACEMENT

A. Place, support and secure reinforcement against displacement. Do not deviate from required position.

B. Conform to applicable code for concrete cover over reinforcement.

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CAST-IN-PLACE CONCRETE

SECTION 033000 - CAST-IN-PLACE CONCRETE

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Slabs on grade.

B. Joint devices associated with concrete work.

C. Concrete curing.

A. Section 031000 - Concrete Forming and Accessories: Forms and accessories for formwork.

B. Section 032000 - Concrete Reinforcing.

A. ACI 211.1 - Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete; American Concrete Institute International; 1991 (Reapproved 2002).

B. ACI 301 - Specifications for Structural Concrete; American Concrete Institute International;

2010.

C. ACI 302.1R - Guide for Concrete Floor and Slab Construction; American Concrete Institute International; 2004 (Errata 2007).

D. ACI 304R - Guide for Measuring, Mixing, Transporting, and Placing Concrete; American Concrete Institute International; 2000.

E. ACI 305R - Hot Weather Concreting; American Concrete Institute International; 2010.

F. ACI 306R - Cold Weather Concreting; American Concrete Institute International; 2010.

G. ACI 308R - Guide to Curing Concrete; American Concrete Institute International; 2001

(Reapproved 2008).

H. ASTM C33/C33M - Standard Specification for Concrete Aggregates; 2013.

I. ASTM C39/C39M - Standard Test Method for Compressive Strength of Cylindrical Concrete

Specimens; 2014.

J. ASTM C94/C94M - Standard Specification for Ready-Mixed Concrete; 2014.

K. ASTM C109/C109M - Standard Test Method for Compressive Strength of Hydraulic Cement

Mortars (Using 2-in. or (50-mm) Cube Specimens); 2013.

L. ASTM C143/C143M - Standard Test Method for Slump of Hydraulic-Cement Concrete; 2012.

M. ASTM C150/C150M - Standard Specification for Portland Cement; 2012.

N. ASTM C173/C173M - Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method; 2014.

O. ASTM C260/C260M - Standard Specification for Air-Entraining Admixtures for Concrete;

2010a.

P. ASTM C309 - Standard Specification for Liquid Membrane-Forming Compounds for Curing

Concrete; 2011.

Q. ASTM C494/C494M - Standard Specification for Chemical Admixtures for Concrete; 2013.

R. ASTM C579 - Standard Test Methods for Compressive Strength of Chemical-Resistant

Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes; 2001 (Reapproved 2012).

S. ASTM C618 - Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete; 2012.

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1.4 QUALITY ASSURANCE

A. Follow recommendations of ACI 305R when concreting during hot weather.

B. Follow recommendations of ACI 306R when concreting during cold weather.

C. VOC Limits: Use concrete accessories that comply with National VOC rule of the United

States Environmental Protection Agency as defined in “40 CFR Part 59, National Volatile Organic Compound Emission Standards for Architectural Coatings.” VOC limits include but are not limited to the following:

1. Form Release Agents and Form Treatments: 450 g/l.

2. Curing and Sealing Compounds: 700 g/l.

3. Bond Breakers: 600 g/l.

2.1 FORMWORK

A. Comply with requirements of Section 031000.

2.2 REINFORCEMENT

A. Comply with requirements of Section 032000.

2.3 CONCRETE MATERIALS

A. Cement: ASTM C150, Type I - Normal, or Type II - Moderate Portland type.

Acquire all cement for entire project from same source.

B. Fine and Coarse Aggregates: ASTM C 33.

Acquire all aggregates for entire project from same source.

C. Fly Ash: ASTM C618, Class C or F D. Water: Clean and not detrimental to concrete.

2.4 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.

C. High Range Water Reducing and Retarding Admixture: ASTM C494/C494M Type G.

D. High Range Water Reducing Admixture: ASTM C494/C494M Type F.

E. Water Reducing and Retarding Admixture: ASTM C494/C494M Type D.

F. Water Reducing Admixture: ASTM C494/C494M Type A.

2.5 JOINTING PRODUCTS

A. Slab Isolation Joint Filler: 1/2 inch thick, height equal to slab thickness.

B. Backer Rod: Sized to fit joint.

C. Joint Sealant: DOWSIL 890-SL or approved equal.

2.6 CURING MATERIALS

A. Curing Compounds, Sealers, and Coatings: Water Based.

1. Toxicity/IEQ: Low VOC.

B. Evaporation Reducer: Liquid thin-film-forming compound that reduces rapid moisture loss

033000 -2 caused by high temperature, low humidity, and high winds; intended for application immediately after concrete placement.

2.7 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.

C. Admixtures: Add acceptable admixtures as recommended in ACI 211.1 and at rates recommended or required by manufacturer.

D. Normal Weight Concrete:

1. Compressive Strength, when tested in accordance with ASTM C39/C39M at 28 days:

4,000 pounds per square inch.

2. Fly Ash Content: Maximum 15 percent of cementitious materials by weight.

3. Water-Cement Ratio: Maximum 40 percent by weight.

4. Total Air Content: 4 percent, determined in accordance with ASTM C173/C173M.

5. Maximum Slump: 3 inches.

2.8 MIXING

A. Transit Mixers: Comply with ASTM C94/C94M.

3.1 EXAMINATION

A. Verify lines, levels, and dimensions before proceeding with work of this section.

3.2 PREPARATION

A. Verify that forms are clean and free of rust before applying release agent.

3.3 PLACING CONCRETE

A. Place concrete in accordance with ACI 304R.

B. Ensure reinforcement, inserts and formed construction joint devices will not be disturbed during concrete placement.

C. Place concrete continuously without construction (cold) joints wherever possible

3.4 SLAB JOINTING

A. Locate joints as indicated on the 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.

D. Saw Cut Contraction Joints: Saw cut joints before concrete begins to cool, within 4 to 12 hours after placing; use 3/16 inch thick blade and cut at least 1 inch deep but not less than one quarter (1/4) the depth of the slab.

3.5 CONCRETE FINISHING

A. Broom Finish

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3.6 CURING AND PROTECTION

A. Comply with requirements of ACI 308R.

3.7 FIELD QUALITY CONTROL

A. Compressive Strength Tests: ASTM C39/C39M. For each test, mold and cure three concrete test cylinders. Obtain test samples for every 100 cu. yd. placed.

B. Take one additional test cylinder during cold weather concreting, cured on job site under same conditions as concrete it represents.

C. Perform one slump test for each set of test cylinders taken, following procedures of ASTM C143/C143M.

3.8 DEFECTIVE CONCRETE

A. Defective Concrete: Concrete not conforming to required lines, details, dimensions, tolerances or specified requirements.

B. Repair or replacement of defective concrete will be determined by the COR. The cost of additional testing shall be borne by Contractor when defective concrete is identified.

C. Do not patch, fill, touch-up, repair, or replace exposed concrete except upon express direction of COR for each individual area.

3.9 PROTECTION

A. Do not permit traffic over concrete until properly cured.

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