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.
戴民, 李姝蓉, 赵明宇. 基于流变模型的降黏型聚羧酸减水剂的试验研究[J]. 材料导报, 2023, 37(17): 22030273-5.
DAI Min, LI Shurong, ZHAO Mingyu. Experimental Study on Viscosity-reducing Polycarboxylate Water Reducer Based on Rheological Model. Materials Reports, 2023, 37(17): 22030273-5.
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2023, Vol. 37 
