杂散电流强度对水泥基材料抗溶蚀性影响  

EFFECT OF STRAY CURRENT INTENSITY ON CORROSION RESISTANCE OF CEMENT-BASED MATERIALS

作　　者：韩瑜[1,2] 王宝民 赵翊彤[1,3] 宋亚琳 HAN Yu;WANG Baomin;ZHAO Yitong;SONG Yalin(School of Civil Engineering,Dalian University of Technology,Liaoning Dalian 116024,China;Liaoning Construction Science Research Institute Co.,Ltd.,Shenyang 110005,China;China Power Construction Group Chengdu Survey Design and Research Institute Co.,Ltd.,Chengdu 610072,China)

机构地区：[1]大连理工大学土木工程学院,辽宁大连116024 [2]辽宁省建设科学研究院有限责任公司,沈阳110005 [3]中国电建集团成都勘测设计研究院有限公司,成都610072

出　　处：《低温建筑技术》2023年第12期33-36,40,共5页Low Temperature Architecture Technology

基　　金：辽宁省重点研发计划项目(2020JH2/10100016)。

摘　　要：文中旨在探明不同杂散电流强度与软水溶蚀耦合作用对水泥基材料力学性能、孔溶液碱度及孔溶液Ca2+浓度的影响。通过测试不同电压强度的杂散电流与软水耦合作用下不同材料的抗压强度随溶蚀龄期变化得出研究结论,结果表明随着直流电源电压的增大,水泥基复合材料的抗压强度先下降后上升,且电压越大,强度上升的拐点出现越晚;在溶蚀前期施加电流时孔溶液pH值下降速度较慢,而后期孔溶液pH值则明显大于不施加电流的组别。The purpose of this paper is to investigate the effectiveness of the coupling of different stray current inten⁃sity and soft water dissolution on the mechanical properties of cement-based materials,the alkalinity of pore solu⁃tion,and the Ca2+concentration of pore solution.The results show that the compressive strength of cement-based composites first decreases and then increases with the increase of DC power supply voltage,in which,the higher the voltage is,the later the inflection point of strength rise.The pH value of the pore solution decrease slowly when the current is applied in the early stage of dissolution,but the pH value of the pore solution in the late stage is signifi⁃cantly greater than that in the group without current application.

关 键 词：电压强度 杂散电流 软水溶蚀 水泥基复合材料 

分 类 号：TU528.04[建筑科学—建筑技术科学]