基于压滤效应影响的废弃石粉-黏土浆液性能研究

doi:10.11896/cldb.23060049

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Abstract A grouting material filter pressure effect simulation device (FSD) was used to study the performance of grout considering grouting pressure, slurry rheology, clay ash content, slurry concentration and particle size composition of waste stone powder (FSD influencing factors). Furthermore, using FTIR, TG-DTG, SEM, EDS, AFM, ICP-AES, and IC microscopic characterization methods, the mechanism of performance development were explained. After the pressure filtration effect, the alkaline environment of the slurry becomes stronger, the number of active particles increases, and CaCO₃ fully agglomerates with clay crystals, increasing the degree of crystallization. The cation exchange capacity increases, and the amount of calcium silicon aluminum based phase and silicon aluminum salt aggregates generated increases. The surface water between the matrix particles expands the crystal layer, reducing the plastic viscosity and yield stress. Free calcium oxide decreases, and the conso-lidation shrinkage rate of the hardened slurry is less than 1%. The water cement ratio is reduced, and the grouting solution is injected into the cracks to solidify into the mold and shorten the total interval time. Within a unit volume, the dispersion space of clustered polymer structures is compressed, and the dissolution rates of Al³⁺ and Ca²⁺ decrease. The use of waste rock powder and clay in the coal mine grouting industry can not only reduce project costs, but also reduce soil erosion and pollution. Due to the optimal slurry ratio and grouting pressure which were proposed here, the experimental results show that the grouting performance of the slurry is good, so it can be considered for filling karst fracture zones in mining areas.

Key words： waste stone powder clay grouting slurry the effect of the filter press slurry property performance development mechanism

Published: 10 May 2025 Online: 2025-04-28

CLC number:

X751

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	Articles by authors
	CHEN Xinming
	CHEN Jiaojiao
	LIU Xiaohui
	JIAO Huazhe
	YANG Zhi
	YANG Liuhua

Cite this article:

CHEN Xinming,CHEN Jiaojiao,LIU Xiaohui, et al. Study on the Properties of Waste Stone Powder-Clay Slurry Based on the Influence of Filtration Effect[J]. Materials Reports, 2025, 39(9): 23060049-10.

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https://www.mater-rep.com/EN/10.11896/cldb.23060049 OR https://www.mater-rep.com/EN/Y2025/V39/I9/23060049

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