| 摘要: |
| 聚羧酸系减水剂（PCE）的性能提升和安全高效应用是混凝土外加剂的重要发展方向，深入理解PCE的作用机理十分必要.为此，简要回顾了PCE的静电斥力效应与空间位阻效应，总结了PCE基于空间位阻效应的构效关系研究进展，并就润湿作用、润滑作用及挤出排空效应3种可能存在的PCE作用机理进行了综述. |
| 关键词: 聚羧酸系减水剂 作用机理 空间位阻效应 挤出排空效应 |
| DOI：103969/j.issn.1007 9629202001010 |
| 分类号: |
| 基金项目:“十三五”国家重点研发计划项目（2016YFC0701004）；国家自然科学联合基金资助项目（U1534207）；国家自然科学基金资助项目（51678441，51808369）；上海市经信委专项资金资助项目（沪CXY 2016 012）；上海市政总院科研项目（K2018J024A）；江苏省高等学校自然科学研究项目（面上项目）（18KJB560016） |
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| Research Progress on Working Mechanism of Polycarboxylate Superplasticizer |
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SHUI Liangliang1, YANG Haijing2, SUN Zhenping2, HE Yan3, ZENG Wenbo4
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1.Shanghai Municipal Engineering Design InstituteGroup Co., Ltd., Shanghai 200092, China;2.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China;3.School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China;4.Shanxi Huanghe New Chemical Co., Ltd., Yuncheng 044000, China
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| Abstract: |
| To promote the performance of polycarboxylate superplasticizer（PCE） as well as to apply PCE safely and efficiently are important development directions of concrete admixtures. Therefore, the deep understanding on working mechanism of PCE is necessary. The electrostatic repulsion effect and steric hindrance effect of PCE were reviewed. Meanwhile, the structure activity relationship of PCE was summarized based on the steric hindrance effect. Finally, the three possible mechanisms of PCE including the effects of wetting, lubrication and depletion is proposed. |
| Key words: polycarboxylate superplasticizer working mechanism steric hindrance effect depletion effect |
