Influence of delayed compaction on the compressibility and hydraulic conductivity of soil-lime mixtures. DI SANTE M, FRATAALOCCHI E, MAZZIERI F, et al. Journal of Guangdong University of Technology, 2017, 34(4): 41-46. A research on microscopic parameters of soft soil pore based on fractal theory in the process of consolidation. Journal of Guangdong University of Technology, 2018, 35(6): 49-56. Experiment study on microstructure of soft soil in Nansha district based on NMR and SEM test. The pore structure characterization of shale based on scanning electron Microscopy and JMicroVision. Change in pore-size distribution of collapsible loess due to loading and inundating. Advances in Materials Science and Engineering, 2020, 2020(5): 1-12. Microstructure of compacted loess and its influence on the soil-water characteristic curve. Journal of Jilin University(Earth Science Edition), 2019, 49(2): 493-503. Experiment on pore structures of Malan loess at different buried depth. Estimating permeability from thin sections without reconstruction: digital rock study of 3D properties from 2D images. South-to-North Water Transfers and Water Science & Technology, 2016, 14(5): 130-136. Indoor experimental study on permeability characteristics of remolded Malan Loess. Experimental study of permeability of remolded Malan Loess. Journal of Wuhan Polytechnic University, 2016, 35(2): 67-71. Cohesive soils’s permeability analysis under different compactness. A law of change in permeability coefficient during compression of remolded clays. Practical pedotransfer functions for estimating the saturated hydraulic conductivity. MBONIMPA M, AUBERTIN M, CHAPUIS R P, et al. Hardy Lecture: full-scale hydraulic performance of soil-bentonite and compacted clay liners. Discussion on applicability of capillary seepage models to loess permeability. Responsibility of permeability of modified loess soil on microstructure. Experimental studies on relationship between deformation and hydraulic permeability of loess in process of penetration. Key words: microscopic pore structure, permeability, lime-treated loess, effective seepage channels, responsibility relationship It is indicated that microscopic pore structure parameters are closely related to macroscopic physical properties, which can reflect changes in macroscopic physical properties to a certain extent. Therefore the permeability of the soil is reducing. The results show that with the increase of the lime contents, the crystalline cement filling the large and medium pores is increasing, corresponding to the number, area, surface porosity of the large and medium pores and average diameter of the large pores in the microscopic image are gradually reduced, but the number and area of small and micro pores and the fractal dimension of pores are on the rise, and the pore structure tends to be complicated, which reduces the proportion of effective seepage channels.
#JMICROVISION CITATION PRO#
To investigate the responsibility between permeability characteristics and pore structure, the falling-head permeability tests at various lime contents are carried on lime-treated loess firstly, and then the Scanning Electron Microscope (SEM) is conducted on some typical specimens which use the Image Pro Plus 6.0 (IPP) Image processing software to count the microscopic pore structure parameters of the improved loess at various lime contents, and, by combining the results of the laboratory permeability test, establish the connection between the macroscopic permeability characteristics and the microscopic pore structure. Soil is a kind of geotechnical engineering material with porous media, and the microscopic pore structure determines macroscopic permeability.
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