不同物料配比充填料浆流变性的体积浓度效应

doi:10.11896/cldb.22050235

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Abstract The ratio of solid volume concentration to critical volume concentration in the filling slurry (referred to as volume concentration ratio) is an important factor to determine the flowability of the slurry, and the material scale, concentration, and ratio of the filling slurry are important factors affecting the rheological properties of the slurry. The effects of different tailing sand ratios, sand-cement ratios, and mass concentrations on the rheological properties of the filling slurry were investigated by a comprehensive experimental method, and the critical volume concentrations were obtained for different material cases. The quantitative relationship between the flowability of the filling slurry and the volume concentration ratio was analyzed. The results showed that the rheological parameters of the filling slurry under steady-state flow increased with increasing mass concentration and decreased with increasing sand-cement ratio. The interaction between tailing sand ratio and sand-cement ratio was stronger at high mass concentration, and the volatility of the rheological parameters of the filling slurry was larger. The volatility increased with an increasing sand-cement ratio. Further, by normalizing the filling slurry solid volume concentration to its critical volume concentration as the volume concentration ratio, it was found that the dynamic yield stress of the filling slurry was quantified as a power function of the volume concentration ratio. At the same time, the plastic viscosity did not have a good quantified relationship with the volume concentration ratio due to the weakened stress conduction caused by the hydration of the cementing agent, indicating that the stress transfer of the rigid tailing sand particles was an important cause of the volume concentration effect of the rheological properties of the slurry.

Key words： tailing sand ratio sand-cement ratio volume ratio rheological property grading parameter

Published: 25 November 2023 Online: 2023-11-21

CLC number:

TD853

Fund:National Natural Science Foundation of China (52130404),the China Postdoctoral Science Foundation (2021M690011),the Guangdong Basic and Applied Basic Research Foundation (2021A1515110161),and the Postdoctor Research Foundation of Shunde Gra-duate School of University of Science and Technology Beijing (2021BH011).

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	Articles by authors
	HUANG Zhenhua
	LI Cuiping
	LI Xue
	RUAN Zhuen
	WANG Shaoyong

Cite this article:

HUANG Zhenhua,LI Cuiping,LI Xue, et al. Volume Concentration Effect on Rheology of Filling Slurry with Different Material Ratios[J]. Materials Reports, 2023, 37(22): 22050235-9.

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http://www.mater-rep.com/EN/10.11896/cldb.22050235 OR http://www.mater-rep.com/EN/Y2023/V37/I22/22050235

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