Characterization and modeling of long-term stress-strain behavior of water confined pre-saturated gypsum rock in Kurdistan Region,Iraq

查看全文 作　　者：N. [1]Salih;A. [2]Mohammed

机构地区：[1]Department of Irrigation Engineering, Faculty of Engineering, University of Sulaimani, Kurdistan Region, Iraq;[2]Department of Civil Engineering, Faculty of Engineering, University of Sulaimani, Kurdistan Region, Iraq

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》索引2017年第9卷第4期,共8页

基　　金：the lraqi Government (Cultural Attaché,UK) for the financial supporting of the first author's PhD study;the University of Sulaimani,Kurdistan Region of Iraq for their support during this study 摘　　要：In order to understand the effects of soaking time and confined water pressure on the strength of rock due to dissolution of gypsum,rock samples with 96% of gypsum content collected from Kurdistan Region in northern Iraq were investigated.Laboratory tests were then performed on the normal gypsum rock samples under pre-saturated condition to obtain their uniaxial compressive strength(UCS) values.The pre-saturated samples were submerged in distilled water for 35 d,70 d and 105 d,respectively,under confined water pressures of 0-0.5 MPa.The gypsum content decreased by 11% after 105 d of soaking under confined water pressure of 0.5 MPa.The UCS of the normal gypsum rock was 19.6 MPa and it decreased to 6.3 MPa and 2 MPa after 105 d of soaking under confined water pressures of 0 and 0.5 MPa,respectively.A nonlinear constitutive model was used to simulate the experimental stress-strain relationships of rock samples under various conditions.The constitutive model parameters were sensitive to the gypsum content. 关键词：GYPSUM content SOAKING time CONFINED WATER pressure Compression Modeling

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Characterization and modeling of long-term stress-strain behavior of water confined pre-saturated gypsum rock in Kurdistan Region,Iraq

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