METHACRYLIC TYPE WATER-SOLUBLE POLYMER AS HIGH-RANGE WATER REDUCING AGENT FOR ULTRA HIGH-STRENGTH CONCRETE

For the purpose of developing water soluble polymers having excellent cement dispersing capability, comb-like methacrylic graft copolymers w ith oligooxyethylene chains as the graft chains, and carboxyl and sulf onic acid groups as functional groups were prepared with sodium methal lylsulfonate as molecular weight control agent in aqueous solution. Th e copolymer comprising of six kinds of specified monomers with a suita ble molecular weight and an adequate molar balance of the functional g roups showed excellent cement dispersing capability.