Steel bar protection test in magnesium cement concrete with different protective layer thickness
(1. College of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. Gansu Key Laboratory of Civil Engineering Disaster Prevention and Reduction, Lanzhou University of Technology, Lanzhou, Gansu 730050, China)
Abstract：To investigate the slight corrosion to steel bars due to the bittern in magnesium cement, a durability test was carried out on magnesium cement concrete components. Combined with different environments, concrete protective layer thickness and increasing steel coating, the electrochemical test of steel in the specimen was carried out, and the specimen was determined by SEM topography and XRD diffraction. The results show that under natural dry environment, the corrosion processes of magnesium cement components with 25 mm and 50 mm concrete protective layer thicknesses are about the same, and the steel bars with 50 mm concrete protective layer thickness are more susceptible to corrosion. Under the condition with 25 mm concrete protective layer thickness, the corrosion of steel bars in magnesium cement concrete components in chloride and natural dry environments shows that the presence of coating can effectively reduce the corrosion current density of steel bars, and the protective effect of steel bars is more prominent under the condition with chloride salts.
乔宏霞， 杨振清， 王鹏辉， 温少勇， 杨天霞. 不同保护层厚度下镁水泥混凝土中钢筋防护试验[J]. 江苏大学学报（自然科学版）, 2021, 42(4): 491-496.
QIAO Hongxia, YANG Zhenqing, WANG Penghui, WEN Shaoyong, YANG Tianxia. Steel bar protection test in magnesium cement concrete with different protective layer thickness[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2021, 42(4): 491-496.
