摘要
聚羧酸减水剂(PCE)因具有掺量低、减水率高、分散性能优异、功能可设计性强、制备过程绿色环保等优点在建设工程领域应用广泛。但是PCE与粘土矿物相互作用,尤其是蒙脱土(MMT)对PCE的有害吸附,使PCE的分散效果显著降低甚至完全丧失。为克服粘土对聚羧酸减水剂的负效应,从聚羧酸减水剂结构性能及其与粘土的作用机理入手,综述了近年来PCE的粘土耐受性研究进展和抑制粘土负效应的策略。通过粘土抑制剂复配、分子结构设计等手段提高PCE对粘土的适应性,为解决聚羧酸减水剂分散性能受制于粘土的技术难题提供基本思路。
Polycarboxylate superplasticizer(PCE)is widely used in the field of construction engineering due to its low dosage,high water reduction rate,excellent dispersion performance,strong functional design,and environmentally friendly preparation process.However,the interaction between PCE and clay minerals,especially the harmful adsorption of montmorillonite(MMT)on PCE,significantly reduces or even completely losses the dispersion performance of PCE.To overcome the negative effect of clay,the research progress of PCE with clay tolerance and the strategies to inhibit the negative effect of clay in recent years have been summarized in view of the interaction mechanism between polycarboxylate superplasticizer and clay.To improve the adaptability of PCE to clay by means of the combination of clay inhibitor and PCE and molecular structure design can provide a basic route for solving the problem that the dispersion performance of polycarboxylate superplasticizer is negatively affected by clay.
作者
张翠珍
唐新德
陈晓东
郭海超
李学凡
ZHANG Cuizhen;TANG Xinde;CHEN Xiaodong;GUO Haichao;LI Xuefan(School of Civil Engineering,Shandong Jiaotong University,Jinan 250357,China;Institute of Intelligent Transportation,Shandong Jiaotong University,Jinan 250357,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2022年第S02期495-499,共5页
Materials Reports
基金
山东省重点研发计划(2017GGX20128)。
关键词
聚羧酸减水剂
粘土耐受性
作用机理
分散性
polycarboxylate superplasticizer
clay tolerance
mechanism of action
dispersion
