酸性干湿循环作用下红砂岩物理力学性能劣化规律  

Study on the Deterioration in Physical and Mechanical Properties of Red Sandstone under Dry-wet Cycling in Acidic Environment

作　　者：张甘平 刘振宁 王鲁男 张洺溪 Zhang Ganping;Liu Zhenning;Wang lunan;Zhang Mingxi(Liaoning Petrochemical University,Fushun 113000,China)

机构地区：[1]辽宁石油化工大学,辽宁抚顺113000 [2]辽宁石油化工大学土木工程学院,辽宁抚顺113000

出　　处：《廊坊师范学院学报（自然科学版）》2023年第1期70-74,共5页Journal of Langfang Normal University(Natural Science Edition)

基　　金：辽宁省教育厅科学技术研究项目(JKZ0404);大学生创新创业训练计划项目(X202210148043)。

摘　　要：研究干湿循环与酸溶液耦合作用对红砂岩物理力学性质的影响,通过对红砂岩试样进行干湿循环试验、单轴压缩试验、扫描电镜及矿物成分测试,研究不同干湿循环次数和溶液不同pH值下试样的物理力学性质参数、微观结构及矿物成分的变化规律。结果表明:随着干湿循环次数的增加、溶液酸性的增强,试样的质量、纵波波速、弹性模量、单轴抗压强度均呈现差异性衰减的规律,微观结构更加紊乱,矿物成分含量发生改变,这是红砂岩物理力学性能劣化的微观机制。In order to study the coupling effects of dry-wet cycling and acid solution on the physical and mechanical properties of red sandstone,thedry-wet cycling tests,uniaxial compression tests,scanning electron microscopy and mineral composition tests were carried out to investigate the changes of physical and mechanical properties,microstructure and mineral composition of the specimens under differentdry-wet cycles and solution pH values.The results show that as thedry-wet cyclesand the acidity of the solution increase,the mass,longitudinal wave velocity,modulus of elasticity and uniaxial compressive strength of the specimens exhibit a differential decay pattern.Moreover,the microstructure becomes disordered and the mineral content changes.This is the microscopic mechanism for the deterioration in physical and mechanical properties of red sandstone.

关 键 词：干湿循环作用 酸腐蚀作用 物理性质 力学性质 微观机制 

分 类 号：TU45[建筑科学—岩土工程]