A METHOD FOR PRODUCING CONCRETE WATER REDUCER BY GRAFTING OF LIGNOSULFONATE WITH CARBONYL GROUP ALIPHATICS

摘要

A method for producing concrete water reducer by grafting of lignosulfonate with carbonyl group aliphatics is provided. Technical proposal of the method is as follows: compound proportioning of the concrete water reducer (weight) is: carbonyl group aliphatics : lignosulfonate = 1: (0.75-1). Concrete water reducer is produced through following steps: controlling the temperature of water reducer of aliphatics at 95-100°C; dropping lignosulfonate into water reducer of aliphatics; conducting graft copolymerization reaction at 95-100°C for 2-5h, and obtaining lignosulfonate modified and grafted aliphatics concrete water reducer. The method is simple, low cost and friendly to environment. The water reducer has good reducing effect, can reduce aberration of concrete and can be applied broadly.