POLYMER FOR EARLY STRENGTH CONCRETE ADMIXTURE AND METHOD FOR PREPARING THE SAME

摘要

PURPOSE: A copolymer for early-strength concrete admixture is provided to obtain early-strength because of the reduction of unit number according to high strength and high durability, thereby reducing construction period. CONSTITUTION: A copolymer comprises 10-60 parts by weight of one or more kinds of unsaturated (meth)polyoxyalkylene urethane compounds in chemical formula 1, 5-30 parts by weight of one or more kinds of amine compounds in chemical formula 2, and 10-40 parts by weight of one or more kinds of unsaturated anionic organic compounds in chemical formula 3. The weight average molecular weight(Mw) of the copolymer is 5,000-150,000. The (meth)polyoxyalkylene urethane compound in chemical formula 1 is manufactured by adding urethane derivative-polyoxyalkylene. A concrete admixture comprises the copolymer.