Microscopic mechanisms and chloride resistance performance of silane coupling agent self-assembly on reinforced concrete utilizing X-ray CT technology: A comprehensive investigation

被引：5

作者：

Ren, Dongya ^{[1
,2
]}

Wang, Zilin ^{[1
,2
]}

Xu, Jie ^{[1
,2
]}

Luo, Wenrui ^{[1
,2
]}

Su, Shaonan ^{[1
,2
]}

Li, Fuhai ^{[1
]}

Ai, Changfa ^{[1
,2
]}

Kong, Lin ^{[1
,2
]}

机构：

[1] Southwest Jiaotong Univ, Civil Engn Sch, Chengdu 610031, Sichuan, Peoples R China

[2] Highway Engn Key Lab Sichuan Prov, Chengdu 610031, Sichuan, Peoples R China

来源：

JOURNAL OF BUILDING ENGINEERING | 2023年 / 80卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Reinforced concrete; Silane coupling agent; Coastal chloride environments; Molecular self-assembly technology; X-ray computed tomography technology; CORROSION-INHIBITOR; BOND STRENGTH; STEEL; STATE; BEHAVIOR; METALS; SILICA; FIBER; FILMS; BARS;

D O I：

10.1016/j.jobe.2023.107992

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

To enhance corrosion resistance in reinforced concrete exposed to chloride environments, a gamma-aminopropyltriethoxysilane (KH550) solution was used to treat the steel bar surface. This study investigated the corrosion resistance and microscopic mechanism of self-assembled silane film modified steel bars. Surface morphology, elemental composition, and functional group changes were analyzed using SEM, EDS, and FTIR before and after solution treatment to determine the optimal treatment concentration. X-ray computed tomography (X-ray CT) was employed to analyze rust evolution and fracture characteristics in steel bars treated with silane coupling agent self-assembly technology. Results revealed that the self-assembly of molecules significantly enhanced corrosion resistance when using a water to ethanol to KH550 solution volume ratio of 50:3:10. The corrosion resistance mechanism of silane self-assembled steel bars against chloride salt corrosion was verified through X-ray CT technology, quantifying the volume expansion rate of rust products.

引用

页数：17

共 1 条

[1] A systematic investigation of the waterproofing performance and chloride resistance of a self-developed waterborne silane-based hydrophobic agent for mortar and concrete
Xue, Xiao
Li, Yanwen
Yang, Zhuo
He, Zhongyu
Dai, Jian-Guo
Xu, Lijin
Zhang, Weidong
CONSTRUCTION AND BUILDING MATERIALS, 2017, 155 : 939 - 946

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