针对机制骨料普通预拌混凝土的聚羧酸减水剂的研究及应用  

Ordinary ready-mixed concrete aggregate for the mechanism of poly carboxylic acid water reducing agent and its application

作　　者：周金钟[1] 陈景[1] 韩周冰[1] 郑广军[1] 

机构地区：[1]中建商品混凝土有限公司(成都),四川成都610000

出　　处：《混凝土》2010年第10期68-72,共5页Concrete

摘　　要：针对使用普通聚羧酸在配制机制骨料混凝土时,混凝土和易性、包裹性等性能差,易出现泌水、离析等问题,提出了APEG型聚羧酸的合成思路,进行了自主分子设计,确定了最佳合成工艺;在使用APEG型聚羧酸进行机制骨料普通混凝土配制时,混凝土包裹性、黏聚性、流动性等得到很好的改善,经2 h坍落度损失后,仍能保持良好;在普通混凝土生产时单位立方米用水量波动5 kg的情况下,仍能维持混凝土的和易性能良好,解决了聚羧酸在使用过程中对用水量非常敏感的问题。For use in the preparation mechanism of poly-carboxylic acid ordinary aggregate concrete,the concrete workability,parcels and other performance is poor,prone to bleeding,segregation and other issues,raised APEG poly-carboxylic acid thought to the design of autonomous molecular to determine the best process;in the use APEG poly-carboxylic acid for ordinary concrete with aggregate mechanism,the concrete encapsulated,cohesiveness,and the mobility of well improved by 2 h slump loss,still maintain good;in unilateral water ordinary fluctuations in concrete production 5 kg circumstances,able to maintain good performance of concrete and easy to solve the poly-carboxylic acid water use during the course of a very sensitive issue.

关 键 词：机制骨料 普通混凝土 APEG 分子设计 聚羧酸 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]