降低高强混凝土黏度的减水剂制备与机理研究  

Preparation and Mechanism of Superplasticizer for Reducing the Viscosity of High Strength Concrete

作　　者：钱珊珊 姚燕 王子明[1] 崔素萍[1] 刘晓[1] 郑春扬[2] QIAN Shanshan;YAO Yan;WANG Ziming;CUI Suping;LIU Xiao;ZHENG Chunyang(Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China;Jiangsu Province Engineering Research Center(ARIT)of Concrete Polymer Additives,Jiangsu China Railway ARIT New Materials Co.,Ltd,Nanjing 211505,China;The State Key Laboratory of Green Building Materials,China Building Materials Academy,Beijing 100124,China)

机构地区：[1]北京工业大学,材料与制造学部,北京100124 [2]江苏奥莱特新材料股份有限公司,江苏省(奥莱特)混凝土高分子助剂工程技术研究中心,南京211505 [3]中国建筑材料科学研究总院,绿色建筑材料国家重点实验室,北京100124

出　　处：《材料导报》2021年第2期2046-2051,共6页Materials Reports

基　　金：国家自然科学基金(51578025,E020501)。

摘　　要：根据分子结构设计原理,以马来酸酐与异戊烯醇聚氧乙烯聚氧丙烯醚大单体为主要反应原料,以甲基烯丙基磺酸钠为链转移剂,合成一款减水剂。采用凝胶渗透色谱、红外光谱、核磁氢谱等测试手段获得了合成产物的分子量及分子量分布等结构参数信息,同时比较了该减水剂与普通减水剂在表面张力、对水泥颗粒吸附行为、Zeta电位、水泥净浆流动性、水泥净浆流变性能及新拌混凝土应用性能方面的差异。性能评价结果表明,该减水剂具有良好的降黏效果,本工作还分析了其降黏作用机理。Asuperplasticizer was synthesized by maleic anhydride and isoprenyl-PE-PPG according to molecular structure design principle. The molecular structure of superplasticizer was determined by Fourier transform infrared spectroscopy, 1H nuclear magnetic resonance and gel permeation chromatography, respectively. The surface tension, adsorption behavior, zeta potential, the flow behaviour of superplasticized cement paste, rheological behavior of cement pastes, and application performance in concrete have been measured. Results of evaluation on performance have showed that superplasticizer has good viscosity-reducing effect and the mechanism of superplasticizer has been analyzed.

关 键 词：高强混凝土 减水剂 降黏 

分 类 号：TU528[建筑科学—建筑技术科学]