Materials Reports  2020, Vol. 34 Issue (Z2): 255-260 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| 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
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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 |
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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.
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Published: 08 January 2021
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| Fund:This work was financially supported by Basic Research Funds of Central Commonweal Research Institutes(Y418007). |
| About author:: Heng Wang,Senior engineer of Nanjing Hydraulic Research Institute, work on the field of the mix proportion and performance of concrete, mineral additive, RCC and SCC. Accomplished about 60 research projects, obtained 9 invention patents and published more than 20 theses. |
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