Investigation of the effect of particle size and coal waste solution on sand stabilization with cement

Document Type : Research Article

Authors

M.S. Student, Civil Engineering department, Qom University of Technology.

Abstract

The accumulation of coal waste from industry has made these materials available and economical to use in ground improvement, thereby reducing environmental pollution. Research has shown that adding cement to coal reduces coal pollution. Therefore, coal wastes of different sizes can be mixed with cement, and the resulting mixture can be used to stabilize and improve sandy soil in road construction or the construction of stone columns. The main objective of this study is to investigate the effect of particle size of coal wastes and coal leachate on the stabilization of fine sand with cement. To achieve this goal, different weight percentages of cement and coal wastes of various sizes were mixed, and the physical and strength characteristics of the resulting mixtures were investigated using several tests such as standard Proctor compaction and unconfined compression tests. To determine the optimal mixing ratio, the study examined the effect of the weight ratio of cement to coal wastes (0/100, 10/90, 20/80, 30/70, 40/60, 50/50) and the particle size of coal wastes passing Sieve No. 40, Sieve No. 200, as well as coal waste solution. The results show that the addition of finer particles of coal waste improves the strength of soils. The unconfined compression test results indicate that increasing the ratio of additives from 2.5% to 7.5% increases the compressive strength, and the optimal mixing ratio of additives is 90% cement and 10% fine coal waste particles.

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Main Subjects

References

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Amirkabir Journal of Civil Engineering
Volume 55, Issue 7
June 2023
Pages 1323-1336

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