... Retarding 2 ASTM C494, Type G 3 Good effective superplasticizer with a set retarding effet Type FHigh Range Water Reducing ... Retarding Concrete Admixture is a water reducing, highly effective superplasticizer with a set retarding effect for concrete in hot ... and ultimate strengths of concrete.JK-08NP is naphthalene-based superplasticizer compounded by some of high-performance retarder, stabilizer and ...