Improved Granite Residual Soils from a Study on Diesel Contamination in East Hunan Province

Qiunan Chen, Kun Long, Xiaocheng Huang (), Zhenghong Chen and Yongchao He
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Qiunan Chen: Hunan Province Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring, Hunan University of Science and Technology, Xiangtan 411201, China
Kun Long: School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Xiaocheng Huang: School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Zhenghong Chen: School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Yongchao He: College of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China

Sustainability, 2023, vol. 15, issue 6, 1-14

Abstract: Soil can be amended with cement, lime, fly ash and other curing agents after diesel contamination. In this study, a diesel-contaminated granite residual soil with an oil content of 9% was selected and amended with cement, lime and fly ash as curing agents and their incorporation levels were varied. A straight shear test showed that 6% lime resulted in the best improvement in the contaminated soil, with a cohesive force of 122.1 kPa and an internal friction angle of 27.1°. A disintegration test revealed that the disintegration resistance of the contaminated soil was improved by 6% cement, 20% fly ash and 10% lime, with 10% lime being the most effective. SEM tests revealed that diesel fuel acted as a constant pore fluid to cause significant fragmentation and separation of the granite residual soil from flakes and blocks to smaller agglomerates and fragments. The curing agent, by increasing the physical reaction products, causes the particles to agglomerate, filling the soil pores and enhancing the integrity of the soil, thus improving the soil properties.

Keywords: diesel-contaminated soils; granite residual soils; curing agent amendment; straight shear; disintegration; microstructure (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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