Burlap Mat: Provide minimum two layers kept saturated with water during curing period. Overlap mats minimum 150 mm (6 inches). Impervious Sheeting: Provide waterproof paper, polyethylenecoated burlap, or polyethylene sheeting. Wet exposed concrete surface with fine spray and cover with sheet materials. Overlap sheets minimum 300 mm (12 inches). Securely anchor sheet materials preventing displacement. Liquid Membrane Curing Compound: Protect joints indicated to receive sealants preventing contamination from curing compound. Insert moistened or fiber rope into joint or cover joint with waterproof paper. curing compound before concrete dries. Apply curing compound in two coats at right angles to each other. Application Rate: Maximum 5 sq. m/L (200 sq. ft./gal.), both Immediately reapply curing compound to surfaces damaged during curing period. SPEC WRITER NOTE: When the project is located in an area where winter damage from deicing chemicals and freezethaw cycles pose a serious problem, check the need for a special protective coating of linseed oil mixture. The coating protects only against the action of urea, sodium chloride, and calcium chloride used for deicing purposes. Protection against these chemicals is not required for concrete that will be in place for a cumulative time of six weeks at a continuous minimum temperature of 5 °C (40 °F), excluding the curing time. Otherwise, give concrete protective coating. CONCRETE PROTECTIVE COATING Apply protective coating of linseed oil mixture to exposedtoview concrete surfaces, drainage structures, and features that project through, into, or against concrete exterior improvements to protect the concrete against deicing materials. Complete backfilling and curing operation before applying protective coating. Dry and thoroughly clean concrete before each application.
Burlap Mat: Provide minimum two layers kept saturated with water during curing period. Overlap mats minimum 150 mm (6 inches). Impervious Sheeting: Provide waterproof paper, polyethylenecoated burlap, or polyethylene sheeting. Wet exposed concrete surface with fine spray and cover with sheet materials. Overlap sheets minimum 300 mm (12 inches). Securely anchor sheet materials preventing displacement. Liquid Membrane Curing Compound: Protect joints indicated to receive sealants preventing contamination from curing compound. Insert moistened or fiber rope into joint or cover joint with waterproof paper. curing compound before concrete dries. Apply curing compound in two coats at right angles to each other. Application Rate: Maximum 5 sq. m/L (200 sq. ft./gal.), both Immediately reapply curing compound to surfaces damaged during curing period. SPEC WRITER NOTE: When the project is located in an area where winter damage from deicing chemicals and freezethaw cycles pose a serious problem, check the need for a special protective coating of linseed oil mixture. The coating protects only against the action of urea, sodium chloride, and calcium chloride used for deicing purposes. Protection against these chemicals is not required for concrete that will be in place for a cumulative time of six weeks at a continuous minimum temperature of 5 °C (40 °F), excluding the curing time. Otherwise, give concrete protective coating. CONCRETE PROTECTIVE COATING Apply protective coating of linseed oil mixture to exposedtoview concrete surfaces, drainage structures, and features that project through, into, or against concrete exterior improvements to protect the concrete against deicing materials. Complete backfilling and curing operation before applying protective coating. Dry and thoroughly clean concrete before each application.
VA%20NCA%2032%2005%2023.docx