scope:

Work specified --This Standard Specification covers requirements for curing the cast-in-place concrete elements described in the Contract Documents.

Specialty concrete and special construction techniques, or other concrete elements that require the use of curing procedures not discussed in this specification are not covered by this Specification.

General -- Immediately after placement, continuously keep concrete in moist condition, maintain specified concrete temperatures, and protect concrete from mechanical injury for the duration of the initial and final curing periods.

Protection from mechanical injury -- Protect the concrete from damaging mechanical disturbances during the curing period. Protect finished surfaces from damage by construction equipment, materials or methods, and from damage caused by application of curing procedures, or by running water.

Cure the concrete as follows:

Unformed surfaces -- Apply one of the curing procedures listed in Sections 2 through 7. If one of the curing procedures is used initially, it may be replaced by one of the other procedures after the concrete is 1 day old, provided that the concrete surface is not permitted to become dry at any time.

Formed surfaces -- Keep absorbent wood forms wet until they are removed. After form removal, cure the concrete by one of the procedures listed in Sections 2 through 7 for the remainder of the curing period.

Curing period -- Cure the concrete for the following time periods:

When testing is not performed to determine the curing period, cure concrete for at least 7 days provided that the concrete surface temperature is at least 10 C (55 F).

When strength basis testing is performed to determine the curing period, maintain curing procedures until test results meet or exceed requirements of Paragraph 1.6.4.2.

When durability basis testing is performed to determine the curing period, maintain curing procedures until tests meet or exceed Paragraph 1.6.4.3.