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一种降黏型聚羧酸减水剂的合成与性能研究
作者：李兴，杨文，熊龙，蔡正华，邢菊香，周永康
（中建商品混凝土有限公司技术中心，湖北 武汉 430205）
摘要：通过在主链引入一种不饱和烷基磷酸三酯单体，使所得聚羧酸减水剂分子呈杂环状多支化结构，增大聚羧酸减水剂吸附层厚度，可以显著降低混凝土的塑性黏度，同时不影响聚羧酸减水剂的减水性能。经高强度等级混凝土应用结果表明，该产品可提高高强度等级混凝土的泵送性能，混凝土的各项性能指标良好。
关键词：降黏；高标号混凝土；磷酸三酯；吸附层
中图分类号：TU528.042+.2 文献标识码：A 文章编号：1001-702X（2019）07-0135-04
Research on synthesis and performance of a viscosity-reducing type ploycarboxylate superplasticizer
LI Xing，YANG Wen，XIONG Long，CAI Zhenghua，XING Juxiang，ZHOU Yongkang
（China Construction Ready Mixed Concret Co. Ltd.，Wuhan 430205，China）
Abstract：In this study，a kind of alkyl phosphate triester monomer is introduced in the ploycarboxylate superplasticizer chain，this ploycarboxylate superplasticizer molecules show a heterocyclic multibranched structure. The structure can increase the thickness of adsorption layer while significantly reduce the plastic viscosity of concrete，meanwhile not affecting the water reducing performance of polycarboxylic superplasticizer. The application of this product in high grade concrete also indicates that the performance indexes of concrete are all good，which improves the pumping capacity of high grade concrete.
Key words：viscosity-reducing，hige grade concrete，phosphate triesters，adsorbed layer