Synthesis, characterization and mechanism of polycarboxylate superplasticizer with slump retention capability

17th IUMRS International Conference in Asia

Li, Mengting^1 ; Wang, Yi^1 ; Jiang, Haidong^1 ; Zheng, Chunyang^1 ; Guo, Zhaolai^1

Jiangsu China Railway ARIT New Materials Co. Ltd., Nanjing

211505, China^1

关键词: Adsorption behavior;    Application performance;    Comprehensive performance;    Gel permeation chromatography (GPC);    Hydroxyethyl acrylate;    Polycarboxylate superplasticizer;    Polycarboxylates;    Structure design;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/182/1/012036/pdf
DOI  :  10.1088/1757-899X/182/1/012036

来源: IOP

【 摘 要 】

Two kinds of slump-retaining polycarboxylate superplasticizer with different molecular structures were synthesized via maleic anhydride(MAH), polyethylene glycol monoallyl ether(APEG) and hydroxyethyl acrylate (HEA)/ethyl acrylate (EA) according to molecular structure design principle. The comprehensive performances of each slump-retaining polycarboxylate superplasticizer were analyzed and compared with that of different molecular structure. The Gel Permeation Chromatography (GPC), surface tension, zeta potential, adsorption behavior, cement paste fluidity and application performance in concrete were measured. And the slump retention mechanism was analyzed. The results show that the polycarboxylate superplaticizer with hydroxyethyl group prepared in this study has good dispersing performance and high slump retention capability for concrete.