Preparation, application and water reducing mechanism of a novel fluorescent superplasticizer with improved flow retaining ability and clay tolerance

被引：17
作者：
Qu, Haojie [1 ,2 ]
Fu, Chang'e [3 ]
Yang, Weiben [1 ]
Yang, Zhen [1 ,4 ]
Zhang, Limin [1 ]
机构：
[1] Nanjing Normal Univ, Sch Chem & Mat Sci, Sch Environm, Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Nanjing, Jiangsu, Peoples R China
[2] Jiangsu China Railway ARIT New Mat Co Ltd, Nanjing, Jiangsu, Peoples R China
[3] Jiangsu Open Univ, Nanjing, Jiangsu, Peoples R China
[4] Nanjing Normal Univ, Changzhou Inst Innovat & Dev, Changzhou, Peoples R China
来源：
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 2018年 / 39卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Adsorption; clay; dispersing retention ability; superplasticizer; DISSOLVED ORGANIC-MATTER; QUATERNARY AMMONIUM-SALT; POLYCARBOXYLATE SUPERPLASTICIZER; CHEMICAL-STRUCTURE; DISPERSION PROPERTIES; AMPHOTERIC COPOLYMER; ADSORBING BEHAVIOR; CEMENT PASTE; PERFORMANCE; MONTMORILLONITE;
D O I：
10.1080/01932691.2018.1462197
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Novel fluorescent polycarboxylate superplasticizer modified by anhydride naphthalene groups was prepared, and characterized by (1) H NMR and FTIR. Fluidity behaviors of cement suspensions mixed with the polycarboxylate indicated that the superplasticizer not only exhibited good fluidity maintaining properties but also demonstrated stable performance in the coexistence of clay. The addition of quaternary ammonium salt polymer can inhibit the water absorption and expansion of clay. Adsorption amounts, adsorption layer thickness and zeta potential were determined to elucidate the water reducing mechanism. The adsorbed layer thickness was linked to the steric hindrance, deciding the dispersing ability and dispersing retention ability. [GRAPHICS]
引用
收藏
页码：1829 / 1839
页数：11
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