Study on the Properties of Waste Stone Powder-clay Slurry based on the Influence of Filter Press

Xinming Chen; Jiaojiao Chen; Huazhe Jiao; Dongbing Li; Zhi Yang; Jie Wang

doi:10.54691/w349z941

Authors

Xinming Chen
Jiaojiao Chen
Huazhe Jiao
Dongbing Li
Zhi Yang
Jie Wang

DOI:

https://doi.org/10.54691/w349z941

Keywords:

Waste Stone Powder; Clay; Slurry; Filter Press Effect; Grouting Performance; Development Mechanism.

Abstract

A grouting material pressure effect simulation device (FSD) was used to study the performance of grout considering grouting pressure, slurry rheology, clay ash, slurry concentration and particle size composition of waste stone powder (FSD influencing factors). After the effect of filter pressing, the alkaline environment of the slurry became stronger, the number of active particles increased, and the CaCO₃ and clay crystals were fully agglomerate, and the degree of crystallization increased. The cation exchange capacity increased, and the formation of calcium-silicon-aluminum matrix phase and aluminosilicate aggregates increased. The surface water between the matrix particles supports the crystal layer, and the plastic viscosity and yield stress are reduced. The free calcium oxide decreased, and the consolidation shrinkage rate after slurry hardening was less than 1%. The water-cement ratio is reduced, and the total time for slurry to be poured into the fracture to consolidate and form a mold and intermittent is shortened. The use of waste stone powder and clay in the coal mine grouting industry can not only reduce project costs, but also reduce soil erosion and soil pollution.

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