基于流变模型的降黏型聚羧酸减水剂的试验研究

doi:10.11896/cldb.22030273

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Abstract In order to solve the problem of high viscosity of high-strength concrete which affects the construction, this study designed the molecular structure of polycarboxylate water reducer (PCE) to improve the viscosity adjustment ability of PCE in low water-cement ratio cementitious material systems. The viscosity-reducing PCE was synthesized by free radical polymerization reaction using isopentenyl polyoxyethylene ether (TPEG), acrylic acid and mercaptopropionic acid as basic ingredients, methyl methacrylate (MMA), sodium methallyl sulfonate (SMAS) and 2-hydroxyethyl methacrylate phosphate ester (HEMAP) as functional monomers. The characteristic functional groups on PCE were revealed by FT-IR spectra, the dispersion and the viscosity-reducing properties of PCE were characterized in combination with flowability tests and rheological tests, respectively. Experimental results showed that PCE has good dispersion and obvious viscosity-reducing performance when the functional monomers was adjusted to the optimal ratio, and the rheological test results were correlated well with the Bingham rheological model.

Key words： polycarboxylate water reducer viscosity-reducing micro slump method rheological model

Published: 10 September 2023 Online: 2023-09-05

CLC number:

TU528.042

Fund:National Natural Science Foundation of China (51908378).

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	DAI Min
	LI Shurong
	ZHAO Mingyu

Cite this article:

DAI Min,LI Shurong,ZHAO Mingyu. Experimental Study on Viscosity-reducing Polycarboxylate Water Reducer Based on Rheological Model[J]. Materials Reports, 2023, 37(17): 22030273-5.

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http://www.mater-rep.com/EN/10.11896/cldb.22030273 OR http://www.mater-rep.com/EN/Y2023/V37/I17/22030273

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