Synthesis of Slightly Cross-linked Viscosity-reducing Polycarboxylate Superplasticizer and Its Influence on Cement Paste with Low Water-Binder Ratio

被引：0
|
作者：
Chen J. [1 ]
Yang C. [1 ]
Gao Y. [2 ]
Yang W. [2 ]
Wang F. [2 ]
Liu M. [2 ]
Zeng C. [2 ]
机构：
[1] College of Materials Science and Engineering, Chongqing University, Chongqing
[2] China West Construction Academy of Building Materials Co., Ltd., Chengdu
来源：
Cailiao Daobao/Materials Reports | 2022年 / 36卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Dispersion performance; Pore solution viscosity; Rheological behavior; Viscosity-reducing polycarboxylate superplasticizer; Water film thickness;
D O I：
10.11896/cldb.20090167
中图分类号：
学科分类号：
摘要：
A superplasticizer was synthesized by isobutyl alcohol polyoxyethylene ether, acrylic acid, maleic anhydride, 2-(dimethylamino)ethyl methacrylate, unsaturated ester, crosslinking agent and potassium persulfate according to the molecular structure design principle. The molecular structure of superplasticizer was determined by Fourier infrared spectroscopy, 1H nuclear magnetic resonance, gel permeation chromatography and dynamic light scattering, respectively. The surface tension, dispersion performance, Marsh time, rheological behavior, water film thickness, adsorption behavior and application performance of fresh concrete of comb-type and micro-crosslinked superplasticizer were comparatively stu-died. Compared with the dosage and Marsh time of PCE-1, those of WJN were reduced by more than 20% and 40%, with the yield stress of the cement paste and the shear viscosity reduced by 45% and 50%, respectively, at the water-binder ratio (w/c) of 0.20 under the same fluidity. The concrete results show that the dosage, slump time and T500 were reduced by more than 10%, 65% and 55%, respectively. Therefore, the superplasticizer of branched structure has good viscosity-reducing effect. © 2022, Materials Review Magazine. All right reserved.
引用
收藏
相关论文
共 39 条
  • [1] Wei S M, Guan Z J., Sichuan Building Materials, 39, 4, (2013)
  • [2] Xu Y B., Anhui Architecture, 3, (2015)
  • [3] Song Z B, Yao Y, Li T, Et al., Journal of Building Materials, 20, 4, (2017)
  • [4] Qian J S, Yin D D, Yu D X, Et al., Journal of Building Materials, 22, 3, (2019)
  • [5] Wang X P, Dong H B, Zhao G H., Commercial Concrete, 5, (2019)
  • [6] Ma Z X, Song P L, Zhou Z B, Et al., Bulletin of Chinese Ceramic Society, 37, 11, (2018)
  • [7] Lai G X, Fang Y H, Ke Y L, Et al., New Building Materials, 46, 6, (2019)
  • [8] Miao C W, Liu J Z., Construction Technology, 42, 10, (2013)
  • [9] Guo C M., Shanxi Architecture, 35, 26, (2009)
  • [10] Wang X G., Synthesis and application of composite micro-crosslinked polycarboxylate superplasticizer, (2019)
1234