711CONCRETE CURING MATERIALS AND ADMIXTURES

711-2.01 Curing Mate Rials.

Burlap Cloth made from Jute or Kenaf AASHTO M 182, Class 4 Sheet Materials for Curing Concrete ASTM C171 Liquid Membrane- Forming Compounds for Curing Concrete ASTM C309, Type 1- D Class B, except do not use compounds containing linseed oil.

711-2.02 Chemical Ad Mixtures.

Air-Entraining Admixtures AASHTO M 154 Water -Reducing Admixtures AASHTO M 194, Type A Set-Retarding Admixtures AASHTO M 194, Type B Set-Accelerating Admixtures AASHTO M 194, Type C Water -Reducing and Set -Retarding Admixtures AASHTO M 194, Type D Water -Reducing and Set -Accelerating Admixtures AASHTO M 194, Type E Water -Reducing Admixtures AASHTO M 194, Type F High Range Water -Reducing and Set -Retarding Admixtures AASHTO M 194, Type G Specific Performance Admixtures ASTM C494, Type S 490 ALASKA 2020 SECTION 712 MISCELLANEOUS

712-2.01 WATER. Use water for mixing and curing concrete meeting ASTM C1602 including the

optional chemical limits. Water from ‘Community’ or ‘Non- Transient Non- Community’ sources regulated by the Alaska Department of Environmental Conservation Division of Environmental Health Drinking Water Program, or equivalent in other states, do not require testing under ASTM C1602. For all other water sources, consider the water to be ‘combined’ as employed in ASTM C1602. Use water for irrigating trees, plants, and seeded areas that is free of elements harmful to plant growth.

712-2.02 Calcium Chl Oride. Aashto M 144.

712-2.03 LIMESTONE. Use limestone containing not less than 85 percent of calcium and

magnesium carbonates. Meet the standards of the Association of Official Agricultural Chemists. Meet the following gradation for agricultural ground limestone suitable for application by a fertilizer spreader: Use soluble or ground limestone in a hydraulic sprayer. Ground limestone must permit complete suspension of insoluble particles in water.

712-2.04 PRECAST CON CRETE CURBING. Portland cement concrete curb units conforming to

the lengths, shapes, an d other details of the Plans. Use steel reinforcement, where shown on the Plans, meeting Subsection 709- 2.01. Furnish a depressed or modified section of curb, when shown on the Plans, for driveways, crossing, closures, or for other reasons.

712-2.05 PRECAS T CONCRETE MANHOLE S ECTIONS. Meet AASHTO M 199, except that the

absorption test will not be required. Reject units with cracks and honeycombed or patched areas in excess of 30 square inches.

712-2.06 FRAMES, GRA TES, AND COVERS. Conform to the plan dimensions and to the

following materials requirements. Gray iron castings AASHTO M 306 and AASHTO M 105, Class 35B. Carbon- steel castings AASHTO M 103. Grade is optional. Structural steel ASTM A709 Galvanizing AASHTO M 111 Malleable iron castings ASTM A47. Gra de is optional. Manhole frames and cover bearing surfaces are machine finished and all covers interchangeable.

712-2.07 CORRUGATED METAL UNITS. Meet AASHTO M 36. When bituminous coating is

specified, meet AASHTO M 190, Type A.

712-2.08 GLASS BEADS . Submit certifications of compliance as specified in Section 106- 1.05

for each lot of glass beads used on the contract. Glass beads shall contain no more than 200 ppm of lead or 200 ppm of arsenic when tested in accordance with EPA testing methods 3062, 6010B, or 6010C . Glass Beads shall meet AASHTO M 247, Type 1, with a moisture resistant coating when tested in accordance with AASHTO T346. Sieve Percent Passing, by Weight, Min. No. 10 100 No. 20 90 No. 100 50