CO1 Cast in Place Concrete.doc

Project # Colleton State Park 9/25

Ranger Residence Renovation Rev. 0

Copyright 2008 by The American Institute of Architects (AIA)

Exclusively published and distributed by Architectural Computer Services, Inc. (ARCOM) for the AIA

SECTION 033000 - CAST-IN-PLACE CONCRETE

Revise this Section by deleting and inserting text to meet Project-specific requirements.

This Section uses the term "Architect." Change this term to match that used to identify the design professional as defined in the General and Supplementary Conditions.

Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes cast-in-place concrete, including formwork, reinforcement, concrete materials, mixture design, placement procedures, and finishes.

1.2 SUBMITTALS

First five paragraphs below are defined in Division 1 Section "Submittal Procedures" as "action submittals."

A. Product Data: For each type of product indicated.

B. Design Mixtures: For each concrete mixture.

Remaining paragraphs are defined in Division 1 Section "Submittal Procedures" as "informational submittals."

C. Material certificates.

1.3 QUALITY ASSURANCE

A. Manufacturer Qualifications: A firm experienced in manufacturing ready-mixed concrete products and that complies with ASTM C 94/C 94M requirements for production facilities and equipment.

Retain subparagraph below if required.

Retain first paragraph below if Contractor or manufacturer retains testing agency for concrete mixture design, material test reports, or field quality control.

B. ACI Publications: Comply with the following unless modified by requirements in the Contract Documents:

Retain second option in first subparagraph below if ACI 301, Section 7, for structural lightweight concrete is applicable.

1. ACI 301, "Specifications for Structural Concrete," Sections 1 through 5.

C. Concrete Testing Service: Owner will engage a qualified independent testing agency to perform material evaluation tests as determined necessary by the engineer.

D. Preinstallation Conference: Conduct conference at Project site.

PART 2 - PRODUCTS

2.1 FORMWORK

A. Furnish lumber or metal formwork and accessories according to ACI 301.

2.2 STEEL REINFORCEMENT

Revise this article to suit steel reinforcement requirements; delete if not required.

Retain first paragraph below if recycled content is required for LEED-NC or LEED-CI Credits MR 4.1 and MR 4.2. The Steel Recycling Institute indicates that reinforcing bars are made by the electric arc furnace method, which typically has 57.5 percent postconsumer recycled content and 6.5 percent preconsumer recycled content.

A. Recycled Content of Steel Products: Provide products with an average recycled content of steel products so postconsumer recycled content plus one-half of preconsumer recycled content is not less than 25 percent.

B. Reinforcing Bars: ASTM A 615/A 615M, Grade 60, deformed.

C. Plain-Steel Welded Wire Reinforcement: ASTM A 185/A 185M, plain, fabricated from as-drawn steel wire into flat sheets.

Retain first subparagraph below for galvanized-steel reinforcement. Class I has at least 50 percent more zinc weight than Class II.

D. Bar Supports: Bolsters, chairs, spacers, and other devices for spacing, supporting, and fastening reinforcing bars and welded wire reinforcement in place. Manufacture bar supports from steel wire, plastic, or precast concrete according to CRSI's "Manual of Standard Practice.

2.3 CONCRETE MATERIALS

A. Cementitious Material: Conform with SCDOT’s Standards for Highway Construction latest edition.

B. Normal-Weight Aggregates: Conform with SCDOT’s Standards for Highway Construction Division 300 and Division 500.

C. Water: ASTM C 94/C 94M and potable.

2.4 ADMIXTURES

A. Air-Entraining Admixture: ASTM C 260.

B. Chemical Admixtures: Provide admixtures certified by manufacturer to be compatible with other admixtures and that will not contribute water-soluble chloride ions exceeding those permitted in hardened concrete. Do not use calcium chloride or admixtures containing calcium chloride.

Retain one or more chemical admixtures from six subparagraphs below.

1. Water-Reducing Admixture: ASTM C 494/C 494M, Type A.

2. Water-Reducing and Retarding Admixture: ASTM C 494/C 494M, Type D.

3. High-Range, Water-Reducing Admixture: ASTM C 494/C 494M, Type F.

2.5 FIBER REINFORCEMENT

A. Synthetic Micro-Fiber: Monofilament polypropylene micro-fibers engineered and designed for use in concrete, complying with ASTM C 1116/C 1116M, Type III, 1/2 to 1-1/2 inches long. Use 2lb of fiber per cubic yard.

2.6 CURING MATERIALS

Evaporation retarder in first paragraph below temporarily reduces moisture loss from concrete surfaces awaiting finishing in hot, dry, and windy conditions. Evaporation retarders are not curing compounds.

A. Evaporation Retarder: Waterborne, monomolecular film forming, manufactured for application to fresh concrete.

Retain curing aids and materials from remaining paragraphs.

B. Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf, weighing approximately 9 oz./sq. yd. when dry.

C. Moisture-Retaining Cover: ASTM C 171, polyethylene film or white burlap-polyethylene sheet.

D. Water: Potable.

Retain first paragraph below if a dissipating-type, waterborne, membrane-forming curing compound is required.

Retain paragraph below if a clear, nonyellowing, waterborne, membrane-forming curing and sealing compound is required.

E. Clear, Waterborne, Membrane-Forming Curing and Sealing Compound: ASTM C 1315, Type 1, Class A.

2.7 RELATED MATERIALS

Retain one or all options in paragraph below. Joint-filler strips are used in floor isolation joints.

A. Expansion- and Isolation-Joint-Filler Strips: ASTM D 1751, asphalt-saturated cellulosic fiber.

2.8 CONCRETE MIXTURES

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, according to ACI 301.

B. Concrete mix shall meet SCDOT Class 3,000 requirements.

If different normal-weight concrete mixtures are required for various building elements, copy and paste first paragraph and applicable characteristics below as required for each normal-weight concrete mixture.

Consider inserting minimum cementitious material content for mix designs.

C. Proportion normal-weight concrete mixture as follows:

Retain strength from five options in first subparagraph below or revise to suit Project. Coordinate compressive strength with water-cementitious materials ratio if concrete will be subject to special exposure conditions or sulfate exposure as identified in ACI 318 (ACI 318M).

1. Minimum Compressive Strength: 3,000 psi at 28 days.

Retain water-cementitious materials ratio from three options in first subparagraph below, revise to suit Project, or delete if in-service durability conditions are benign and limits on water-cementitious materials ratio are not required. Coordinate water-cementitious materials ratio with compressive strength. See Evaluations for discussion.

Retain slump limit from three options in first subparagraph below or revise to suit Project.

2. Slump Limit: 4 inches.

3. Synthetic Micro-Fiber: Uniformly disperse in concrete mixture at 2 pounds per cubic yard.

If different structural lightweight concrete mixtures are required for various building elements, copy and paste paragraph and applicable characteristics below as required for each structural lightweight concrete mixture.

2.9 FABRICATING REINFORCEMENT

A. Fabricate steel reinforcement according to Concrete Reinforcing Steel Institute (CRSI's) "Manual of Standard Practice."

2.10 CONCRETE MIXING

Retain option in paragraph below if synthetic fibers are required.

A. Ready-Mixed Concrete: Measure, batch, mix, and deliver concrete according to ASTM C 94, and furnish batch ticket information.

1. When air temperature is between 85 and 90 deg F, reduce mixing and delivery time from 1-1/2 hours to 75 minutes; when air temperature is above 90 deg F, reduce mixing and delivery time to 60 minutes.

PART 3 - EXECUTION

3.1 FORMWORK

A. Design, erect, shore, brace, and maintain formwork, according to ACI 301.

3.2 EMBEDDED ITEMS

Specify embedded items and anchorage devices for other work attached to or supported by cast-in-place concrete. Insert specific requirements for installing embedded items, if any, that are part of the Work.

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.

3.3 STEEL REINFORCEMENT

A. General: Comply with CRSI's "Manual of Standard Practice" for placing reinforcement.

3.4 JOINTS

Coordinate joint types, description, and location with Drawings. Joint types have been consolidated in this article for consistency rather than for strict sequence of installation.

A. General: Construct joints true to line with faces perpendicular to surface plane of concrete.

Revise criteria for locating construction joints in first paragraph below to suit Project.

B. Construction Joints: Install so strength and appearance of concrete are not impaired, at locations indicated or as approved by Engineer.

Insert spacing of contraction joints here or on Drawings if required. Contraction-joint spacings vary with slab thickness, aggregate size, and slump based on PCA's recommendations. Depth of joint may be varied to suit cutting method or if steel-fiber reinforcement is used. Early-entry saws may cut less than one-fourth of concrete thickness; steel-fiber-reinforced slabs, one-third of concrete thickness.

3.5 CONCRETE PLACEMENT

A. Before placing concrete, verify that installation of formwork, reinforcement, and embedded items is complete and that required inspections have been performed.

B. 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.

1. Do not use cold joints where concrete is not continuous pour.

C. Cold-Weather Placement: Comply with ACI 306.1.

D. Hot-Weather Placement: Comply with ACI 301.

3.6 FINISHING FORMED SURFACES

Retain types of formed finishes required in this article. Coordinate finishes retained with finish schedule or indicate location of each finish on Drawings.

Retain rubbed finish in first paragraph below with smooth-formed finish in paragraph above.

A. Related Unformed Surfaces: Broom Finish: Apply a broom finish to exterior concrete sidewalks and elsewhere as indicated.

3.7 CONCRETE PROTECTING AND CURING

A. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures. Comply with ACI 306.1 for cold-weather protection and ACI 301 for hot-weather protection during curing.

If evaporation rate in first paragraph below is exceeded, ACI 305R states that plastic shrinkage cracking is probable. See manufacturers' literature or ACI 305R for estimated moisture-loss chart relating relative humidity, air and concrete temperature, and wind velocity to rate of evaporation.

B. Evaporation Retarder: Apply evaporation retarder to unformed concrete surfaces if hot, dry, or windy conditions cause moisture loss approaching 0.2 lb/sq. ft. x h before and during finishing operations. Apply according to manufacturer’s written recommendations.

C. Cure concrete according to ACI 308.1, by one or a combination of the following methods:

Retain one or more curing methods from four subparagraphs below. Delete methods or restrict use of curing methods to specific locations or types of surfaces if required.

1. Moisture Curing: Keep surfaces continuously moist for 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 (300 mm), and sealed by waterproof tape or adhesive. Cure for not less than seven days. Immediately repair any holes or tears during curing period using cover material and waterproof tape.

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.

Retain first subparagraph below if requiring removal of curing compounds that may interfere with adhesion of floor coverings.

Curing and sealing compound in subparagraph below is usually for floors and slabs and may act as a permanent surface finish.

4. Curing and Sealing Compound: Apply uniformly to floors and slabs indicated in a 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. Repeat process 24 hours later and apply a second coat. Maintain continuity of coating and repair damage during curing period.

3.8 CONCRETE SURFACE REPAIRS

A. Defective Concrete: Repair and patch defective areas when approved by Engineer. Remove and replace concrete that cannot be repaired and patched to Engineer’s approval.

3.9 FIELD QUALITY CONTROL

A. Testing and Inspecting: Owner will engage a qualified testing and inspecting agency to perform field tests and inspections as deemed necessary by the Engineer.

END OF SECTION 03300

CAST-IN-PLACE CONCRETE

033000 - 1