832.1 General Description
This section includes the requirements for the following curing agents: • Burlap or cotton fabric • Sheet materials • Membrane curing compound
832.1.01 Related References
A. Standard Specifications General Provisions 101 through 150. B. Referenced Documents AASHTO M 148 AASHTO M 171 QPL 16
832.2 Materials
832.2.01 Burlap or Cotton Fabric
A. Requirements Use burlap or cotton fabric meeting these requirements: • Burlap that is 10 to 18 oz./yd² (340 to 610 g/m²) or two layers of 6 or 7 oz/yd² (200 or 235 g/m²) • Cotton fabric that is white, loosely woven, and not less than 7 oz/yd² (235 g/m²) • Strips of burlap or cotton fabric that are between 3 and 6 ft. (0.9 and 1.8 m) wide and 3 ft. (1 m) longer than the width of the slab to be covered Use burlap and cotton fabrics that do not contain starch or other material that could stain the concrete. If the fabric is new, soak and dry it before use. B. Fabrication General Provisions 101 through 150. C. Acceptance General Provisions 101 through 150. D. Materials Warranty General Provisions 101 through 150.
832.2.02 Sheet Materials
A. Requirements Use sheet material for curing concrete that meets AASHTO M 171 requirements. Use waterproof paper that is white. Use polyethylene film that is white opaque. For curing bridge decks, use sheet material that is either a white burlap polyethylene sheet or a white co-polymer material coated over a layer of absorbent, non-woven, synthetic fabric. Use sheet material that meets specification reflection and moisture retention requirements. B. Fabrication General Provisions 101 through 150. C. Acceptance See the requirements under AASHTO M 171. D. Materials Warranty General Provisions 101 through 150.
832.2.03 Membrane Curing Compound
A. Requirements Use membrane curing compounds listed in QPL 16 Use liquid membrane-forming compounds meeting AASHTO M 148 requirements. Use membrane curing compounds evaluated by the National Transportation Product Evaluation Program (NTPEP) test facility or other approved test facility. B. Fabrication General Provisions 101 through 150. C. Acceptance See the requirements under AASHTO M 148. D. Materials Warranty General Provisions 101 through 150.
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