碱性溶液腐蚀作用下黄砂岩力学特性试验研究  

The Experimental Study on Mechanical Properties of Yellow Sandstone under the Action of Alkali Corrosion

作　　者：王永佳[1] 戎虎仁[1] 王大路[1] 郭强[1] 穆柏林 赵岩[1] 詹亮[1] 

机构地区：[1]河北建筑工程学院土木工程学院,河北张家口075000

出　　处：《河北建筑工程学院学报》2017年第2期15-20,共6页Journal of Hebei Institute of Architecture and Civil Engineering

基　　金：国家自然科学基金项目(50974115);河北省教育厅青年基金项目(QN2016066);河北建筑工程学院校级基金项目(XB201734);河北建筑工程学院校级基金项目(XB201724);张家口科技计划项目(1611601A)

摘　　要：为研究pH值不同的碱性溶液对黄砂岩力学性能弱化规律,通过自制室内渗透溶蚀装备,获得黄砂岩化学腐蚀过程各溶液渗透量、pH值和电导率的变化规律;对溶蚀后的黄砂岩进行单轴压缩试验,探讨不同pH值的碱性溶液对黄砂岩腐蚀效应,获得化学溶液对黄砂岩强度和弹性模量的影响规律.结果表明:(1)随着溶液pH值的增大,其渗透量也越大,最后趋于稳定;(2)电导率变化规律表明黄砂岩溶蚀只在溶液接触表面进行,并未无限制反应;(3)化学腐蚀后岩样的单轴抗压强度随着碱溶液pH值的增大而减小,弹性模量随着碱溶液pH值的增大而增大.In order to study the law of mechanical properties of yellow sandstone weakened by different alkaline solution,through the self-made indoor infiltration and dissolution equipment,the infiltration of the chemical corrosion process of yellow sandstone,the change of the pH value and the conductivity of the chemical solution are acquired.The uniaxial compression test of the yellow sandstone after erosion was conducted by uniaxial compression test system.The effect of chemical solution on the mechanical properties of yellow sandstone was discussed and the influence of chemical solution on the strength and elastic modulus of yellow sandstone was obtained.The results showed that：（1）As the pH value of the chemical solution increased,the permeation amount of the chemical solution increased,and finally became stable.（2）The change of conductivity of the solution shows that the yellow sandstone dissolution is only carried out on the contact surface of the solution,and the reaction is not unrestricted.（3）The uniaxial compressive strength of rock samples decreases with the increase of chemical solution pH value,and the elastic modulus increases with the increase of pH value of chemical solution.

关 键 词：岩溶腐蚀 黄砂岩 力学特性 

分 类 号：TU45[建筑科学—岩土工程]