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《Journal of Zhejiang University(Engineering Science)》 2015-08
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Experimental study on soft clay contact area based on SEM and IPP

XU Ri-qing;XU Li-yang;DENG Yi-wen;ZHU Yi-hong;Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University;Key Laboratory of Soft Soils and Geoenvironmental Engineering,Ministry of Education,Zhejiang University;  
In order to study soft clay microstructure and find the relation with soil macro-mechanical properties,ZJU-Zijingang clay was taken as an example in the paper.Microstructure characteristics of ZJU-Zijingang clay were observed using scanning electron microscope(SEM)and were quantitatively studied using Image Pro-Plus(IPP)software.The microstructure characteristics of soft clay were described.The Gray Threshold Partition Method was proposed according to soil porosity obtained in laboratory tests.The concact area and the porosity were mainly measured.Finally the relationship between the pore area ratio and the porosity was established.The results show that ZJU-Zijingang clay microstructure is honeycomb structure that consists of clay particles like winter withered leaves.There is a power function relationship between the pore area ratio and the porosity.The quantitative relation between micro and macro is established.
【Fund】: 国家自然科学基金资助项目(51178420);; 国家科技支撑计划资助项目(2012BAJ01B04)
【CateGory Index】: TU442
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