聚羧酸减水剂专用抗离析剂的性能研究

Property investigations of anti-segregation agent specialized for polycarboxylate water reducing agent

近年来聚羧酸减水剂越来越普及,很多建筑单位为了追求混凝土的性价比,往往喜欢用减水率很高的聚羧酸减水剂,这就导致混凝土对用水量敏感性非常大,再加上很多地方使用机制砂,导致现在很多混凝土泌水、抓底、板结问题越来越严重。一般减水剂厂家采用复配适量的保水调黏剂和和易性调节剂以降低对水的敏感性。本课题就是研发了一种新型的聚羧酸减水剂专用抗离析剂,解决了聚羧酸减水剂导致的混凝土泌水、抓底、板结等问题,该产品和聚羧酸减水剂相溶性非常好,同时具有比目前市面上的产品有更高的性价比。

Polycarboxylate superplasticizer(PC)has become more and more popular in recent years,High water reducing Polycarboxylate superplasticizer was used by many constructor for pursuit of the high performance-price ratio,which leads that the concrete is very sensitive to water consumption.Moreover,manufactured sand was widely used,which lead to many issues to the concrete.The common practices for reducing the sensitivity of water consumption is compounding adhesive and water-retaining admixtures and workability regulator.This study developed a new Anti-segregation agent for PC,which solved the bleeding issue,grabbing bottom andcompaction,also have a good compatibility with PC and highest cost performance.