Structural characteristics and its influencing factors of typical loess

The aim of this study was to analyze the influences of water content, calcium carbonate (CaCO 3 ) 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, sa...

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Veröffentlicht in:Bulletin of engineering geology and the environment 2019-10, Vol.78 (7), p.4893-4905
Hauptverfasser: Chen, Huie, Jiang, Yaling, Gao, Yue, Yuan, Xiaoqing
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Jiang, Yaling
Gao, Yue
Yuan, Xiaoqing
description The aim of this study was to analyze the influences of water content, calcium carbonate (CaCO 3 ) 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, CaCO 3 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 CaCO 3 content, and decreasing dry density. Water content had the greatest effect on the CSP, and CaCO 3 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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Oedometer testing was conducted on undisturbed, saturated, and disturbed loess samples under various conditions of water content, CaCO 3 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 CaCO 3 content, and decreasing dry density. Water content had the greatest effect on the CSP, and CaCO 3 content had the least effect. There were two kinds of changes in the structural properties of samples under different conditions: strengthening and weakening. 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subjects Calcium
Calcium carbonate
Calcium carbonates
Carbonates
Coefficient of variation
Deformation
Deformation mechanisms
Density
Dry density
Earth and Environmental Science
Earth Sciences
Electron microscopy
Evolution
Foundations
Geoecology/Natural Processes
Geoengineering
Geological engineering
Geotechnical Engineering & Applied Earth Sciences
Hydraulics
Intrusion
Loess
Mathematical analysis
Mercury
Microstructure
Moisture content
Nature Conservation
Original Paper
Porosity
Properties
Scanning electron microscopy
Soil
Soil properties
Water content
Weight
title Structural characteristics and its influencing factors of typical loess
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