Rheological model of cement-based material slurry with different water-cement ratio and temperature

IF 1.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Multidiscipline Modeling in Materials and Structures Pub Date : 2024-01-02 DOI:10.1108/mmms-05-2023-0181

Hongjing Dong, Xi Chen, Guangying Yang, Dandan He, Yingchun Dai, Pengfei He

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Abstract

PurposeThe purpose of this paper is to obtain a constitutive model of cement-based material in the rheological stage, which owns the different water-cement ratio (w/c) and temperature and have a significant impact on the workability of concrete materials.Design/methodology/approachIt is introduced a modified Arrhenius equation into the Herschel–Bulkley model, which is widely applied in rheological analysis and constructed an ordinary differential equation (ODE) of w/c from the Navier–Stokes equation. By solving the ODE, an approximate constitutive relation of cement-based materials included w/c and temperature is derived. Compared with the experimental results, the present model is validated.FindingsThe shear stress and shear rate curves with different w/c and temperature are simulated by the present method, and the present model can be applied to analyze the changes of apparent viscosity in cement-based material slurry as the w/c and temperature varying.Originality/valueThis work gives a mathematical model, which can effectively approximate the shear stress–shear rate relation with different w/c and temperature in the rheological stage of cement-based material.

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不同水灰比和温度下水泥基材料浆体的流变模型

本文的目的是获得水泥基材料在流变阶段的构成模型，该模型包含不同的水灰比（w/c）和温度，对混凝土材料的工作性有显著影响。通过求解该 ODE，得出了包含 w/c 和温度的水泥基材料近似构成关系。结论本方法模拟了不同 w/c 和温度下的剪切应力和剪切速率曲线，本模型可用于分析水泥基材料浆体中表观粘度随 w/c 和温度变化的变化情况。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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