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Bulletin of Engineering Geology and the Environment

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30-11-2018 | Original Paper

Structural characteristics and its influencing factors of typical loess

Authors: Huie Chen, Yaling Jiang, Yue Gao, Xiaoqing Yuan

Published in: Bulletin of Engineering Geology and the Environment | Issue 7/2019

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Abstract

The aim of this study was to analyze the influences of water content, calcium carbonate (CaCO₃) content, and dry density on the structural characteristics of typical loess, using comprehensive structure potential (CSP) as the structural parameter. Oedometer testing was conducted on undisturbed, saturated, and disturbed loess samples under various conditions of water content, CaCO₃ content, and dry density to obtain the deformation data. Based on the collected data, we calculated the CSP and analyzed the structural properties of the samples. The weight of each influencing factor was quantified using a variation coefficient method. To analyze the evolution mechanism of soil structural properties, we determined the microstructure of the samples by scanning electron microscopy studies and mercury intrusion porosimetry. The results showed that the CSP increased with decreasing water content, increasing CaCO₃ content, and decreasing dry density. Water content had the greatest effect on the CSP, and CaCO₃ content had the least effect. There were two kinds of changes in the structural properties of samples under different conditions: strengthening and weakening. Large pores exerted a significant influence on soil structural properties.

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Title: Structural characteristics and its influencing factors of typical loess
Authors: Huie Chen
Yaling Jiang
Yue Gao
Xiaoqing Yuan
Publication date: 30-11-2018
Publisher: Springer Berlin Heidelberg
Published in: Bulletin of Engineering Geology and the Environment / Issue 7/2019
Print ISSN: 1435-9529
Electronic ISSN: 1435-9537
DOI: https://doi.org/10.1007/s10064-018-1431-2

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