Effect of pore fluid on microstructure in expansive soil

被引：0
|
作者：
Lin J. [1 ,2 ]
Ye J. [1 ,2 ]
Zou W. [1 ,2 ]
机构：
[1] School of Civil Engineering, Wuhan University, Wuhan
[2] Hubei Provincial Key Laboratory of Safety for Geotechnical and Structural Engineering, Wuhan University, Wuhan
来源：
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2020年 / 48卷 / 04期
关键词：
Double electric layers; Expensive soil; Mercury intrusion porosimetry; Microstructure; Pore fluid;
D O I：
10.13245/j.hust.200403
中图分类号：
学科分类号：
摘要：
Relying on mercury intrusion porosimetry and scanning electron microscopy microstructure investigation, a detailed analysis of the microstructure evolution for the compacted expansive soil specimens with different initial dry densities(1.3, 1.5, 1.7 g/cm3)saturated in salt solutions with different concentrations(0.0, 0.5, 1.0, 2.0 mol/L)was made.Mercury intrusion porosimetry results show that the NaCl solutions have a marked influence on small and micro pores, and the numbers of small and micro pores reduce with increasing NaCl solution concentrations.Such effect is more obvious when the initial dry density increases.Scanning electron microscopy photos show that pore fluids possess a significant influence on the global form of the expansive clay microstructure.In addition, the electric double layers are compacted with increasing Na+ concentration, leading to the aggregation of soil particles and the presence of relatively large interconnected pores. © 2020, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.
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页码：12 / 17
页数：5
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