| 摘要 |
PURPOSE:To produce a cement water reducing agent capable of exhibiting a high water reducing effect at all times regardless of the water-to-cement ratio. CONSTITUTION:The copolycondensate of the condensate (SAF) of the 4.4'- dihydroxydiphenyl sulfone, 4-aminobenzenesulfonic acid and formalin and the condensate (AAF) of the 2,2'-bis(4-hydroxyphenyl)propane, 4-aminobenzenesulfonic acid and formalin is used. Excellent performance is exhibited which is not obtained by merely mixing SAF and AAF, the water reducing property is enhanced regardless of the water-to-cement ratio, the fluidity and the amt. of air entrained are not changed with time, and setting is not so retarded. |
