711CONCRETE CURING MATERIAL AND ADMIXTURES

711.1CURING AND PROTECTING COVERS—

follows:

Machine Direction Cross Machine Direction 7.0 lbs/lin. in. 7.0 lbs/lin. in.

burlap backed white polyethylene sheeting is 8.0 ounces per square yard.

113 pounds per 1,000 square feet in 72 hours when testing according to ASTM C156.

ASTM E1347.

square yard.

Grab Tensile Strength Grab Tensile Elongation Puncture 120 lbs 50% 65 lbs ASTM D4632 ASTM D4632 ASTM D4833

sides within weather-proof covers of asphalt-saturated kraft crepe or polyethylene sheeting, and conforming to the following requirements:

• Asphalt-saturated crepe covers manufactured from extra heavy, two-ply, kraft crepe, totaling not less than 30 pounds per 1,000 square feet, on the weather side and of kraft paper or kraft crepe, of not less than 15 pounds per 1,000 square feet, on the reverse side.

• Polyethylene covers manufactured from sheeting of not less than 6 mils normal thickness on the weather side and of not less than 4 mils normal thickness on the reverse side.

• Fiber bonded to the covers of insulating mats over 24 inches in width, to prevent bunching of the mats during storage, shipping, or handling.

forming closed- cell foam insulation, with the cells uniformly distributed and conforming to the following requirements:

• Water absorption, percent by volume, tested according to ASTM D2842—3.0 max.

• Density, pounds per cubic foot, tested according to ASTM D1622—1.0 - 6.0

711.2CURING COMPOUNDS—

translucent and containing a red fugitive dye; Type 2, white pigmented. The rate of application for testing untextured specimens is 200 square foot per gallon. Type I cement from Lafarge Bath plant in Ontario and Ottawa ASTM graded sand are used in the mortar for testing. The curing compound must be manufactured to:

• Remain sprayable at temperatures above 40F.

• Control sagging, pigmented settling, leveling, and de-emulsification.

• Maintain the specified properties for at least 1 year.

Settlement of pigment must be a thoroughly wetted, soft, mushy mass allowing the complete and easy vertical penetration of paddle. Settled pigment must be easily predisposed, with minimum resistance to the sideways manual motion of the paddle across the bottom of the container, to form a smooth, uniform product of the proper consistency. Do not dilute or alter the curing compound after manufacture. Package the curing compound in clean 275- gallon totes, 55- gallon barrels, or 5- gallon pails, or supply curing compound from a suitable storage tank locate d at the job site. The containers must comply w ith 49 CFR 171-180. Provide 275-gallon totes and 55-gallon barrels with removable lids and airtight fasteners. The 5-gallon pails must be round and have standard full open head and bail. Do not use lids with bungholes. Fill containers in a way that prevents skinning. Line steel containers and lids with a coating that prevents destructive action by the compound or chemical agents in the air space above the compound. The coating must not come off the container or lid as skins. Plastic containers and lids must not react with the curing compound. Label each curing compound container with:

• Manufacturer’s name

• ASTM C309 classification

• Lot number

• Volume

• Date of manufacture

• Shelf Life

• Volatile organic compound content

• Warning that curing compound containing pigment must be well stirred before using with no dilution, introduction of air or other foreign substances into the curing compound

• Precautions concerning the handling and application of curing compound

• Statement that the contents fully comply with State air pollution control rules and regulations

Use the curing compound within 12 months from the date of manufacture or before the expiration of the product shelf live, whichever occurs first.

ASTM C309, Type 2, Class B as modified below:

• Total Solids (% by weight of compound): to be used as a reference

• % Reflectance in 72 hours (ASTM E1347): 60 minimum

• Loss of Water, pounds per square foot in 72 hours (ASTM C156): 0.082 maximum

• VOC content (pounds per gallon): 2.90 maximum

• Infrared Spectrum, Vehicle: 100% alpha methylstyrene

The rate of application for testing untextured specimens in 200 square feet per gallon. Type I cement from Lafarge Bath plant in Ontario and Ottawa ASTM graded sand are used in the mortar for testing. The curing compound must be manufactured to:

• Remain sprayable at temperatures above 40F.

• Control sagging, pigmented settling, leveling, and de-emulsification.

• Maintain the specified properties for at least 1 year.

Settlement of pigment must be a thoroughly wetted, soft, mushy mass allowing the complete and easy vertical penetration of paddle. Settled pigment must be easily predisposed, with minimum resistance to the sideways manual motion of the paddle across the bottom of the container, to form a smooth, uniform product of the proper consistency. Do not dilute or alter the curing compound after manufacture. Package the curing compound in clean 275- gallon totes, 55- gallon barrels, or 5- gallon pails, or supply curing compound from a suitable storage tank located at the job site. The containers must comply with 49 CFR 171-180. Provide 275-gallon totes and 55-gallon barrels with removable lids and airtight fasteners. The 5-gallon pails must be round and have standard full open head and bail. Do not use lids with bungholes. Fill containers in a way that prevents skinning. Line steel containers and lids with a coating that prevents destructive action by the compound or chemical agents in the air space above the compound. The coating must not come off the container or lid as skins. Plastic containers and lids must not react with the curing compound. Label each curing compound container with:

• Manufacturer’s name

• ASTM C309 classification

• Lot number

• Volume

• Date of manufacture

• Shelf Life

• Volatile organic compound content

• Warning that curing compound containing pigment must be well stirred before using with no dilution, introduction of air or other foreign substances into the curing compound.

• Precautions concerning the handling and application of curing compound.

• Statement that the contents fully comply with State air pollution control rules and regulations .

Use the curing compound within 12 months from the date of manufacture or before the expiration of the product shelf live, whichever occurs first.

RS-1 or CRS -1) or cut -back asphalt (Class RC -70, ASTM D2028) both conforming to the performance requirements of ASTM C309 for Type 4.

fatty alcohol, capable of retarding moisture evaporation from concrete. Use material from a manufacturer listed in Bulletin 15.

Form CS-4171.

711.3CONCRETE ADMIXTURES —Of an approved type, from a manufacturer listed in Bulletin 15, and

conforming to the following requirements:

• 1.0% by weight of the admixture for use in conventional reinforced cement concrete

• 0.1% by weight of the admixture for use in prestressed concrete

batch or lot number and date of manufacture. Forward a bill of lading with each bulk shipment, bearing the same information as necessary for drums. Each shipment will be subject to sampling and testing at any time.

stabilizers have been added at the point of manufacture and homogeneous and uniform in composition. Conform to the prequalification requirements specified in Report FHWA -RD-78-35, “Styrene- Butadiene Latex Modifiers for Bridge Deck Overlay Concrete,” April 1978.

complying with ASTM C979. Provide test report complying with ASTM C979 from an Independent Certified Laboratory. The maximum prescribed dosage rate of the pigment must be less than 10% by weight of the cement. Maintain water/cement ration when using liquid pigments. Demonstrate that the amount of pigment added has little or no effect on the physical properties of the fresh or hardened concrete.

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