SECTION 03360INTEGRALLY COLORED CONCRETE

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PART 1 GENERAL

1.1 SECTION INCLUDES

A. Integrally colored concrete slabs-on-grade.

B. Integrally colored concrete sidewalks.

C. Integrally colored concrete driveways.

D. Integrally colored concrete patios.

E. Integrally colored concrete roads.

F. Integrally colored concrete parking lots.

G. Curing of integrally colored concrete.

1.2 RELATED SECTIONS

A. Section 02751 - Portland Cement Concrete Paving.

B. Section 03300 - Cast-in-place Concrete.

C. Section 03330 - Architectural Concrete.

D. Section 03365 - Exposed Aggregate Concrete.

E. Section 07900 - Joint Sealers: Colored sealants for joints.

1.3 REFERENCES

A. ACI 301 Specification for Structural Concrete for Buildings.

B. ACI 302.IR Guide for Concrete Floor and Slab Construction.

C. ACI 303.1 Standard Specification for Cast-In-Place Architectural Concrete.

D. ACI 304 Recommended Practice for Measuring, Mixing, Transporting and Placing of Concrete.

E. ACI 305R - Recommended Practice for Hot Weather Concreting.

F. ACI 306R - Recommended Practice for Cold Weather Concreting.

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G. ASTM C 309 - Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete; American Concrete Institute.

H. ASTM C 494 - Standard Specification for Chemical Admixtures for Concrete.

I. ASTM C 979 - Standard Specification for Pigments for Integrally Colored Concrete.

J. ASSHTO M194 - Chemical Admixtures.

K. NRMCA CIP 5 - Plastic Shrinkage Cracking.

1.4 SUBMITTALS

A. Submit under provisions of Section 01300.

B. Product Data: Manufacturer's data sheets on each product specified, including:1. Preparation instructions and recommendations.2. Storage and handling requirements and recommendations.3. Installation methods.

C. Design Mixes: For each type of integrally colored concrete.

D. Samples for Concrete Color Selection: Manufacturer's color chart or sample chip set; indicating color additive number and dosage rate. Submittals are for general verification of color and may vary somewhat from concrete finished in field.

E. Samples of Aggregate and Sand.

F. Samples for Verification of Precast Concrete: _____ samples, 2 by 2 feet (610 by 610 mm) indicating concrete color range, texture, and uniformity.

G. Samples of Form Facing Materials: Coordinate submittal with materials specified in Section _____.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications: Manufacturer with 10-years experience in the production of specified products.

B. Installer Qualifications: An installer with 5 years experience with work of similar scope and quality.

C. Provide all materials from the same source.

D. Comply with the requirements of ACI 301.

E. Mock-Up: Provide a mock-up for evaluation of consistent color and visual appearance of colored concrete.1. Coordinate mock-up requirements with mock-ups specified in other sections; same

mock-up may be used for more than one purpose.2. Construct at least one month before start of colored concrete work, using materials

and methods to be used in actual work.3. Locate mock-ups on site in areas designated by Architect. Mock up shall be:

a. Full size.b. 10 feet by 10 feet (3 m by 3 m).c. 4 feet by 4 feet (1.2 m by 1.2 m).d. _____________.

4. Retain samples of all materials used in each mock-up for comparison purposes.

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5. Mock-up may remain and be utilized in the work.6. Remove mock-up when no longer required for comparison with finished work.

F. Preconstruction Conference: Conduct a review of procedures required to produce specified results.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Comply with manufacturer's instructions.

B. Deliver to site or batch plant in original, unopened packaging. Store in dry conditions.

1.7 PROJECT CONDITIONS

A. Environmental Requirements:1. Schedule placement to minimize exposure to wind and hot sun before curing

materials are applied.2. Avoid placing concrete if rain, snow, or frost is forecast within 24-hours. Protect fresh

concrete from moisture and freezing.3. Comply with practices described in ACI 305R and ACI 306R.

B. Plant-Mixed Concrete: Schedule delivery of concrete to provide consistent mix times from batching until discharge. Maintain batch records for each batch.

C. Concrete Paving: Schedule placement to minimize exposure to wind and hot sun before curing materials are applied.

D. Formed Concrete: Schedule work to minimize differences in placements and curing conditions. Apply curing compound as soon as forms are stripped.

E. Tilt-Up Concrete: Schedule work to minimize differences in time that panels remain on casting slab to minimize differences in curing conditions. Apply curing compound to panels as soon as they are put into place.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Acceptable Manufacturer: L. M. Scofield Company, which is located at: 4155 Scofield Rd.; Douglasville, GA 30134; Toll Free Tel: 800-800-9900; Tel: 770-920-6000; Fax: 770-920-6066; Email:request info (info@scofield.com); Web:www.scofield.com

B. Substitutions: Not permitted.

C. Requests for substitutions will be considered in accordance with provisions of Section 01600.

2.2 CONCRETE MIX DESIGN

A. Minimum Cement Content: 5 sacks per cubic yard of concrete.

B. Slump of concrete shall be consistent throughout Project at 4 inches or less. At no time shall slump exceed 5 inches. If super plasticizers are allowed, slump shall not exceed 8-inches.

C. Do not add calcium chloride to mix as it causes mottling and surface discoloration.

D. Supplemental admixtures shall not be used unless approved by manufacturer.

E. Do not add water to the mix in the field.

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F. Add colored admixture to the mix according to manufacturer's written instructions in premeasured bags, not by weight of cement content.

2.3 MATERIALS

A. Colored Admixture for Integrally Colored Concrete: CHROMIX P Admixture and CHROMIX ML.1. Description: Colored, water-reducing admixture with lime proof and UV resistant

coloring agents. Contains no calcium chloride.2. Conformance: ACI 303.1, ASTM C979, ASTM C494, and AASHTO M194.

B. Antiquing Release Agent: Lithochrome Antiquing Release; Ready to use, dry-shake hardener for freshly placed concrete hardscapes or floors.

C. LITHOTEX Pavecrafters imprinting tools

D. Curing Compound for Integrally Colored Concrete: Complying with ASTM C 309 and of same manufacturer as colored admixture.1. Exterior Integrally Colored Concrete: LITHOCHROME Colorwax.2. Interior and Exterior Integrally Colored Concrete: COLORCURE Concrete Sealer.

E. Curing and Sealing Compound for Integrally Colored Concrete: Complying with ASTM C 309 and of same manufacturer as colored admixture.1. Component 1: Cureseal-W.

a. Finish: Semi-gloss.2. Component 2: Cureseal-S.

a. Finish: Gloss.b. Finish: Matte.

2.4 COLORS, FINISHES AND PATTERNS

A. Concrete Colors:1. Cement: Color shall be:

a. Gray.b. White.

2. Sand:a. Locally available natural sand.b. Manufactured white sand.c. Match Architect's sample.

3. Aggregate: Concrete producer's standard aggregate complying with specifications.

B. Stamp/Imprinting Pattern:1. As selected from Scofield LITHOTEX Pavecrafters pattern sheets.

C. Powder Antiquing Release Agent:1. As selected from manufacturer's standard colors.

D. Curing Compound: Color to match colored concrete.

E. Texture: Uniform, slip resistant surface.1. Finish: Broomed.2. Finish: Swirl.3. Finish: Sandblasted.4. Finish: __________.

F. CHROMIX Integral Color: Admixtures for Color-Conditioned Concrete.1. Color: 0288 Autumn Beige2. Color: 1010 Brownstone

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3. Color: 1014 Canyon Tan4. Color: 1015 Etruscan Tile5. Color: 1017 Barcelona Brown6. Color: 1019 Bridgeport Beige7. Color: 1078 Chicory Spice8. Color: 1266 Cool Gray9. Color: 1589 Durango Brown10. Color: 1677 Eldorado Tan11. Color: 1734 English Rose12. Color: 1906 Fennel Green13. Color: 1967 Fiesta Red14. Color: 2543 Landmarks Gray15. Color: 3172 Moonlight Gray16. Color: 3237 Musky Mulberry17. Color: 3292 Navajo Red18. Color: 3410 Nutmeg Brown19. Color: 4302 Roman Tile20. Color: 4662 Santa Fe Tile21. Color: 4821 Shady Red22. Color: 4959 Smoky Plum23. Color: 5059 Sorrento Red24. Color: 5130 Spring Beige25. Color: 5178 Stetson Buff26. Color: 5234 Summer Beige27. Color: 5238 Sunbaked Clay28. Color: 5265 Surrey Beige29. Color: 5402 Taos Taupe30. Color: 5460 Timberline Tan31. Color: 6063 Winter Beige32. Color: 6213 Golden Maize33. Color: C-11 Desert Sand34. Color: C-12 Mesa Beige35. Color: C-13 Tawny Pink36. Color: C-14 French Gray37. Color: C-15 Coachella Sand38. Color: C-20 Limestone39. Color: C-21 Adobe Tan40. Color: C-22 Coral Red41. Color: C-24 Charcoal42. Color: C-25 Sombrero Buff43. Color: C-26 Antique Cork44. Color: C-27 Westwood Brown45. Color: C-29 Dusty Mauve46. Color: C-31 Shadow Slate47. Color: C-32 Quarry Red48. Color: C-34 Dark Gray

PART 3 EXECUTION

3.1 EXAMINATION

A. Do not begin installation until substrates have been properly prepared.

B. If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.

3.2 PREPARATION

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A. Clean surfaces thoroughly prior to installation.

B. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.

C. Protect adjacent surfaces with plastic sheeting during color hardener.

3.3 CONCRETE FINISH

A. Sandblasted Finish: Allow concrete to cure to sufficient strength that it will not be damaged by blasting but not less than seven days. Provide surface to match originally approved mockup.

B. Broomed: Pull broom across freshly floated or troweled concrete to produce required texture. Do not dampen brooms. Provide surface to match originally approved mockup. Texture shall be:1. Fine texture.2. Medium texture.3. Coarse texture.4. Provide in straight lines perpendicular to main line of traffic.5. Provide in wavy lines perpendicular to main line of traffic.

C. Swirl: Float concrete. Work float flat on surface using pressure in swirling manner to produce series of uniform arcs and twists. Provide surface to match originally approved mockup.1. Use aluminum or magnesium float to produce medium texture.2. Use wood float to provide coarse texture.

D. Trowel: Surface shall be uniformly troweled so that it will not be slippery. Do not over-trowel or burnish the surface.

E. Rock Salt: Float, trowel, or broom concrete and sprinkle salt on concrete and press into surface leaving only tops of salt grains exposed. After 24 hours, wash salt away with water and brush. Allow surface and impressions to dry before applying curing compound.

F. Sandblast: Allow concrete to cure to sufficient strength so that it will not be damaged by blasting but not less than seven days. Use sandblasting to remove cement mortar from surface and expose aggregate to match originally approved mockup.

G. Exposed Aggregate: Finish concrete and apply chemical surface retarder according to manufacturer's written instructions. Wash surface to match originally approved mockup.

3.4 CURING COMPOUND APPLICATION

A. Integrally Colored Concrete: Apply compound for integrally colored concrete according to manufacturer's instructions using manufacturer's recommended application techniques. Apply compound at consistent time for each pour to maintain close color consistency.

B. Curing compound to be the same color as the colored concrete and supplied by same manufacturer of the colored admixture.

C. Precautions must be taken in hot weather to prevent plastic cracking resulting from excessively rapid drying at surface as described in CIP 5Plastic Shrinkage Cracking published by the National Ready Mixed Concrete Association.

D. Do not cover concrete with plastic sheeting.

3.5 PROTECTION

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A. Protect installed products until completion of project.

B. Touch-up, repair or replace damaged products before Substantial Completion.

END OF SECTION

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