Influence of Gradational Characteristics of Sands on Rheology Properties of Mortar and Rheology Prediction
WANG Heng1,2,3, LU Cairong1,2,3, LIU Weibao1,2,3, MEI Guoxing1,2,3, GE Xueliang1,2,3, YANG Hu1,2,3
1 Nanjing Hydraulic Research Institute, Nanjing 210029,China 2 Research Center of Ministry of Water Resources on New Materials in Hydraulic Structures, Nanjing 210024,China 3 State Key Laboratory of Hydrology-water Resources and Hydraulic Engineering, Nanjing 210029,China
Abstract: Mortars made from manufactured and natural river sands with different gradations were prepared, and its rheology parameters (yield stress & plastic viscosity) were measured by rheometer. The experimental result indicated that the volume rate of sand, fineness modulus and content of stone powder have direct impact on rheology properties, meanwhile, the threshold volume rate of sand exist. Based on analysis on the fractal curve of sand particles, the quantity value of sand fractal characteristics were obtained, and then the fractal sums (Sy, Sv) were defined to express the exponential relationship with rheology parameters. Furthermore, based on the rheology prediction expression of suspension, the fractal sums were introduced and the prediction method is developed. From the experimental data, the related coefficients were derived by fitting and the modified equations were obtained. The calculated value and test value of rheology were compared and the result showed good consistency.
王珩, 陆采荣, 刘伟宝, 梅国兴, 戈雪良, 杨虎. 砂的级配特性对砂浆流变性的影响及预测[J]. 材料导报, 2020, 34(Z2): 255-260.
WANG Heng, LU Cairong, LIU Weibao, MEI Guoxing, GE Xueliang, YANG Hu. Influence of Gradational Characteristics of Sands on Rheology Properties of Mortar and Rheology Prediction. Materials Reports, 2020, 34(Z2): 255-260.
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2020, Vol. 34 
