减缩型聚羧酸减水剂的合成及其性能  

Synthesis of Polycarboxylate Type Superplasticizer with the Function of Shrinkage-reducing and Its Performance

作　　者：顾越[1] 何辉[1] 赵利保[1] 蒋亚清[1] 

机构地区：[1]河海大学力学与材料学院,南京210098

出　　处：《科学技术与工程》2013年第10期2887-2890,共4页Science Technology and Engineering

基　　金：高性能土木工程材料国家重点实验室开放基金项目(2011CEM004);中央高校基本科研费项目(B12020126)资助

摘　　要：选择了一种具有减缩性能的聚醚基团,将其接枝引入到梳状聚羧酸共聚物分子主链中,制得了减缩型聚羧酸减水剂HHG,用红外光谱表征了HHG结构,并考察了其对溶液表面张力以及水泥胶砂性能的影响。结果表明:本研究制备的HHG不仅拥有较好的减水效果,而且能够将溶液表面张力降低至45 mN/m,降低了30.87%的水泥胶砂28d干燥收缩率。较之萘系,脂肪族及其普通聚羧酸减水剂,更适宜应用于对减缩抗裂有较高要求的混凝土工程。A kind of polycarboxylate type superplasticizer （HHG） that has the function of shrinkage-reducing was synthesized by grafting block-polyether into the main chain of comb polycarboxylic. The structure of HHG was characterized by the Fourier transform infrared spectroscopy （FTIR）. Its influences on surface tension of solution and performance of cement mortar were investigated. Experimental results indicated that the water-reducing rate of HHG was good as our expected, surface tension of solution with it was reduced into 45 mN/m, and the 28 d drying shrinkage of cement mortar had a 30.87 % reduction when mixed with it. Comparing to naphthalene formaldehyde, aliphat sulfate and polycarboxylic water reducing, HHG was more suitable for some concrete work with high requirements of shrinkage-reducing and anti-cracking.

关 键 词：聚羧酸减水剂 合成 表面张力 减缩 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]