polycarboxylate high-performance water reducer is the third generation developed after common water reducer represented by calcium lignosulphonate and efficient water reducer represented by naphthalene. it is mainly applied to the synthesis of polycarboxylate water reducer. product molecular weight distribution is narrower with lower by-product content and better batch-to-batch stability. meanwhile, raw materials are strictly controlled to guarantee safety and environmental protection of the product. it is currently widely applied to highway, bridge, dam, tunnel, high-rise building, etc.