化学腐蚀作用下层状复合岩石的性能研究

Properties of Layered Composite Rock Under Chemical Corrosion

选取红砂岩、青砂岩和大理岩为原材料,制作成不同组合、不同界面层倾角的层状复合岩样,并在pH=2和pH=4的酸性环境下养护30d.将养护后的试件进行单轴抗压试验,测定试件的抗压强度并观察其破坏模式.试验结果表明:经过酸性溶液的养护,不同岩石组合、不同界面层倾角的复合层状岩石的单轴抗压强度均有一定的降低,且酸性越强,岩样抗压强度下降越大;当界面层倾角增大时,酸性环境的影响减小,随着界面层倾角的增大,复合岩石的抗压强度有较大程度的降低,且破坏模式发生改变.

Red sandstone,bluish sandstone and marble were selected as raw materials to make layered composite rock samples with different combinations and different interfacial dip angles.After the maintenance of 30d in an acid environment(pH=2 or pH=4),uniaxial compressive tests were carried out on the cured specimens.The compressive strength of the specimens was measured,and the failure mode was observed.The test results demonstrated that after the curing with the acid solution,the uniaxial compressive strength of the composite rock with different rock combinations and different interfacial dip angles showed a certain decrease,and the stronger the acidity,the greater the decrease of the compressive strength of the rock sample.As the angle of the interfacial layer was increased,the influence of the acid environment was considerably reduced.The rock samples were affected by the inclination angle of the interfacial layer,and the compressive strength was greatly reduced,then the failure mode changed.