Mechanical behavior of micaceous clays

作     者：Jiahe Zhang Amin Soltani An Deng Mark B.Jaksa 

作者机构：School of CivilEnvironmental and Mining EngineeringThe University of AdelaideAdelaideSA 5005Australia Department of Infrastructure EngineeringThe University of MelbourneParkvilleVIC 3010Australia 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)

年 卷 期：2019年第11卷第5期

页      面：1044-1054页

核心收录：

学科分类：08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：made possible through the provision of an Australian Government Research Training Program Scholarship 

主　　题：Micaceous clay Mica content Consistency limits Compaction Shear strength Confinement Frictional resistance 

摘      要：This study aims to investigate the effect of mica content on the mechanical properties of *** available ground mica was blended with a locally available clayey soil,at varying mica contents by mass of 5%,10%,15%,20%,25%and 30%,to artificially prepare various micaceous clay *** preliminary testing phase included consistency limits and standard Proctor compaction *** primary testing program consisted of unconfined compression(UC),direct shear(DS)and scanning electron microscopy(SEM)*** test results showed that the liquid and plastic limits exhibited a linear,monotonically increasing trend with increase in mica *** rate of increase in the plastic limit,however,was found to be greater than that of the liquid limit,thereby leading to a gradual transition towards a non-plastic,cohesionless *** soft,spongy fabric and high water demand of the mica mineral led to higher optimum water contents and lower maximum dry unit weights with increasing mica *** low confinement conditions,*** UC test and the DS test at low normal stresses,the shear strength was adversely affected by ***,the closer packing of the clay and mica components in the matrix under high confinement conditions offsets the adverse effects of mica by inducing frictional resistance at the shearing interface,thus leading to improved strength resistance.