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1026-1 GENERAL.

All curing agents shall be free from any impurities which may be detrimental to the concrete. Curing agents shall not be used until the applicable tests have been performed and the curing agent has been approved by the Engineer.

1026-2 LIQUID MEMBRANE CURING COMPOUNDS.

(A) General:

Liquid membrane curing compounds shall meet the requirements of AASHTO M148 except that when tested in the water retention test described in AASHTO T155, the curing compound shall restrict the loss of water present in the test specimen at the time of application of the compound to not more than 0.03 grams per square centimeter of surface.

The curing compound shall be Type 2, white pigmented, except that where clear type is required for a particular application, the curing compound shall be Type 1, clear or translucent, to which a fugitive dye has been added. Curing compounds containing wax shall not be used.

Curing compound shall be delivered in the manufacturer's original clean, sealed containers. Each container shall be legibly marked with the name of the manufacturer, the name of the compound, the type of compound, the manufacturer's batch number, the date of manufacture, and the manufacturer's recommended shelf life.

Curing compound which has been in storage for more than one year from the date of manufacture or more than the manufacturer's recommended shelf life, whichever is less, shall not be used.

(B) Test Procedures:

Curing compound will be tested in accordance with the test methods described or referred to in AASHTO M148 except as otherwise provided below.

The size of molds for making test specimens will be approximately 5 1/2 inches in diameter by approximately 1 inch deep, or any other size selected by the Engineer.

(C) Curing Compound for Concrete Pavement & Concrete Shoulder:

The curing compound shall meet the requirements of Subarticles 1026­2(A) and 1026­2(B), except as otherwise provided in this subarticle.

Curing compound shall be a white pigmented membrane curing compound. Curing compounds containing all resin base, all wax base or a combination of the two may be used.

1026-3 POLYETHYLENE FILM.

Polyethylene film shall meet the requirements of AASHTO M171 for white opaque polyethylene film, except that when tested for moisture retention efficiency the loss shall be not more than 0.03 grams per square centimeter of surface area.

1026-4 WATER.

All water used for curing concrete shall meet the requirement of Article 1024­4.

1026-5 BURLAP.

Burlap shall meet the requirements of AASHTO M182. Any class of burlap will be acceptable.

Burlap shall be new burlap or burlap which has been used for no purpose other than curing concrete. New burlap shall be free from starch, filler, or other substances added during the process of manufacturing, or shall be washed to remove such substances before using.

1026-6 PAPER BLANKETS.

Paper blankets shall meet the requirements of AASHTO M171, except that when tested for moisture retention efficiency the loss shall be not more than 0.03 gram per square centimeter of surface area.