Abstract
Granite residual soil presents a strong disintegration phenomenon when it encounters water, thus contributing to geological disasters such as collapsing erosion. Disintegration characteristics are closely related to the initial moisture content and temperature. However, the relevant quantitative assessment is still lacking. In this study, the disintegration of granite residual soil in the collapsing erosion zone of southern China was analyzed. Disintegration tests were performed to measure the total disintegration time after the soil samples had been soaked in water. The disintegration process was captured by measuring the weight change over time. Based on the disintegration rate and characteristics of the disintegrative deposit, the effects of dry density, initial moisture content, and temperature on granite residual soil disintegration were evaluated. The results show that the effects of dry density on the disintegration rate are not obvious, and an increase in dry density only delays the time when the soil sample enters the rapid disintegration stage. The initial moisture content has a considerable effect on the disintegration rate, and the disintegration rate increases as the initial moisture content increases. Furthermore, as the temperature increases, the disintegration rate increases. An increase in temperature greatly accelerates the entry of water molecules into the soil sample, thus potentially damaging the aggregation between particles and increasing the disintegration rate.
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Funding
This research is funded by the National Natural Science Foundation of China (No. 41962015), the Science Foundation of Jiangxi Provincial Education Department (Grant: GJJ 190605), and Science Foundation of Jiangxi Science and Technology Normal University (Grant: 2017BSQD010).
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Responsible Editor: Zeynal Abiddin Erguler
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Luo, X., Gao, H., He, P. et al. Experimental investigation of dry density, initial moisture content, and temperature for granite residual soil disintegration. Arab J Geosci 14, 1060 (2021). https://doi.org/10.1007/s12517-021-07239-4
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DOI: https://doi.org/10.1007/s12517-021-07239-4