4.3 Chemical Admixtures shall conform to the following applicable ASTM specifications: 4.3.1 Air-entraining Admixtures—Specification C 260. 4.3.2 Water-reducing, Retarding, and Accelerating Admixtures—Specification C 494/C 494M. 4.3.3 Pigments for Integrally Colored Concrete— Specification C 979. 4.4 Other Constituents—Integral water repellents, and other