821 Page 520821 CONCRETE CURING MATERIALS
821.1REQUIREMENTS:
Curing materials will conform to the following requirements as specified: A.Curing Blankets: 1.Burlap Cloth made from Jute or Kenaf .......................................... AASHTO M 182 2.Non-woven Polypropylene Geotextile Fabric: White non-woven polypropylene geotextile fabric conforming to the following requirements may be used in lieu of burlap for horizontal applications only. This material is not to be used for curing vertical surfaces. Property Test Method UnitMinimum Average Roll Value Weight ASTM D 5261 ounces/square yard 8.0 B.Polyethylene Sheeting: White polyethylene sheeting will be durable to withstand the intended job use, without puncturing or tearing. During cool weather, the Engineer may permit the use of black polyethylene sheeting in lieu of white polyethylene sheeting. C.Liquid Membrane Forming Compounds for Curing Concrete: Curing compounds for concrete will be either white pigmented or linseed oil base emulsion unless one type is specifically required in the plans. 1.White Pigmented: The white pigmented compound will conform to the requirements of ASTM C309 Type 2. 2.Linseed Oil Base Emulsion: The linseed oil base emulsion compound will conform to the requirements of ASTM C309 Type 2, except as modified by the following: a.The compound will be a water emulsified linseed oil emulsion of 50% ±4% oil phase/50% ±4% water phase composition. (Linseed oil phase/water phase proportions will be formulated exclusive of added pigment.) The oil and water phase composition of linseed oil base emulsion will be tested in accordance with SD 509. b.Linseed oil used in the emulsion formulation will consist of a blend of 80% boiled linseed oil and 20% Z-8 viscosity linseed oil. c.The compound will be sprayable above 40ºF. 3.Storage: The compounds will be stored at temperatures above 35ºF. Compound stored for a period in excess of six months will require resampling and testing for compliance prior to use. 4.Sampling and Testing: The Department will test the liquid membrane forming compounds for water retention in accordance with AASHTO T 155 at an application rate of 1 gallon per 200 ft2. 830 Page 521830 RIPRAP
830.1RIPRAP
A.Riprap: Stone for riprap will be hard and durable and will have a minimum weight of 155 pounds per cubic foot. Riprap may be ledge rock or field stone If field stone is utilized for Class B or larger, the stone will have a minimum of 2 crushed faces as defined under SD 211. Stone will be free from overburden, spoil, shale, and organic material. The riprap stone will meet the following gradation requirements: Riprap ClassRock Size*1 in feet Rock Size in poundsPercent of Riprap Smaller Than A1.30 0.95 0.40200 75 5100 50 B1.80 1.30 0.40500 200 5100 50 C2.25 1.80 0.951000 500 75100 50 D2.85 2.25 1.802000 1000 500100 50 E3.60 2.85 2.254000 2000 1000100 50 F4.50 3.60 2.858000 4000 2000100 50 *1Based on a specific gravity of 2.65 and spherical shape. The riprap class is the median particle weight with 50% of the material smaller and 50% of the material larger. Each load of riprap will be well graded from the smallest to the maximum size specified. B.Testing: Specific Gravity .......................................................................................... SD 210