抗泥型聚羧酸减水剂研究与应用现状

Research and Application Status of Mud-resistant Polycarboxylic Acid Water-reducing Agent

随着我国基础建设步伐的加快,大量天然的砂石骨料被消耗。目前优质的混凝土原材料日益减少,其标志是砂石骨料中的含泥量日益增加,混凝土原材料中的含泥量会影响聚羧酸系减水剂的分散效果,从而影响混凝土的工作性能。本文综述了国内外多名专家学者关于抗泥型聚羧酸减水剂的研制与应用现状,分别从改变聚羧酸减水剂的分子结构、引入抗泥官能团、加入牺牲剂等方面进行总结与分析,并对抗泥型聚羧酸减水剂未来的研究方向提出了建议。

With the acceleration of infrastructure construction in China,a large amount of natural sand and gravel aggregates are consumed.At pre-sent,high-quality concrete raw materials are declining.The sign is that the mud content in sand and gravel aggregates is increasing.The mud content in concrete raw materials will affect the dispersion effect of polycarboxylic acid-based water-reducing agents,thereby affecting the performance of concrete.This article reviews the development and application status of many domestic and foreign experts and scholars on the anti-sludge type polycarboxylate water-reducing agent,from the aspects of changing the molecular structure of the polycarboxylate water-reducing agent,introducing anti-sludge functional groups,and adding sacrificial agents.Suggestions for the future research direction of anti-mud-type polycarboxylic acid water-reducing agent are put forward.