围压对Ⅱ型CA砂浆力学性能的影响

摘要

对不同围压下的CRTS-Ⅱ型CA砂浆进行了三轴压缩试验,并测定CA砂浆的应力应变曲线.分析了峰值应力、峰值应变、残余强度及弹性模量随围压的变化规律,并对其进行线性拟合.结果表明,随着围压的增大,应力应变曲线峰值处逐渐平缓;峰值应力、峰值应变及残余强度逐渐变大,弹性模量基本不变;CA砂浆试件破坏时的裂缝与轴线的夹角逐渐增大.%In order to get the stress-strain curve of CRTS-Ⅱ CA mortar,the triaxial compression tests under different confining pressures were conducted.The variation of the peak stress,peak strain,residual strength and elastic modulus under different confining pressures were analyzed,then followed by a linear regression of them.Results show in the following:Along with the increase of confining pressure,the peak of stress-strain curves tends to be gentle,residual strength,peak stress and peak strain increase gradually,and elastic modulus remains unchanged.The angle between crack and axis increases gradually when the CA mortar specimen is destroyed.