Study on improvement of durability for reinforced concrete by surface-painting migrating corrosion inhibitor and engineering application

被引：5

作者：

Song, Ning ^{[1
]}

Wang, Zixiao ^{[1
]}

Liu, Zhiyong ^{[1
]}

Zhou, Jiyuan ^{[2
]}

Zheng, Duo ^{[2
]}

机构：

[1] Yantai Univ, Sch Civil Engn, Yantai 264005, Shandong, Peoples R China

[2] Jilin Prov Inst Water Conservancy Sci Res, Changchun 130000, Jilin, Peoples R China

来源：

1ST INTERNATIONAL CONFERENCE ON NEW MATERIAL AND CHEMICAL INDUSTRY (NMCI2016) | 2017年 / 167卷

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1088/1757-899X/167/1/012072

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The corrosion currents of steel bar in concrete with three W/B and four chloride contents after surface-painting two migrating corrosion inhibitors (PCI-2015 and MCI-A) 14d to 150d in atmospheric condition were measured. The results showed that the corrosion current density (I-corr) of steel bar reduced to 0.1 mu A. cm(-2) from the initial highest 3.833 mu A. cm(-2) (W/B= 0.65, NaCl-1%) after surface-painting PCI-2015 14 d, and the I-corr was still lower than 0.1 mu A. cm(-2) until 150d. The compressive strength and chloride migration coefficient of concrete specimens were tested. The possible reasons of the mechanisms of durability improvement for reinforced concrete by applying PCI-2015 inhibitor were PCI-2015 may be reacted with calcium hydroxide in cement concrete and lots of inhibitor particles may be adsorbed on the active sites first and then a stable protective layer may be formed. The Icorr of steel bars in a hydraulic aqueduct concrete structure after painting PCI-2015, MCI-A (the United States) and MCI-B (Europe) during 6 months was monitored by Gecor 8 tester. The results showed that the average values of Icorr of steel bars after painting the PCI-2015 150d fulfilled the specification requirements in "Design code for concrete structure strengthening (E. 3)"(GB50367-2013).

引用

页数：5