Non-uniformity of Porous Band in Steel-Concrete Interface and Its Influence on Formation of Corrosion Products

被引：0

作者：

Chen, F. ^{[1
]}

Li, C. Q. ^{[1
]}

Baji, H. ^{[1
]}

机构：

[1] RMIT Univ, Sch Civil Engn, Melbourne, Vic 3000, Australia

来源：

PROCEEDINGS OF THE 25TH AUSTRALASIAN CONFERENCE ON MECHANICS OF STRUCTURES AND MATERIALS (ACMSM25) | 2020年 / 37卷

关键词：

Reinforced concrete structures; Corrosion of steel; Porous band; Interface microstructure; BACKSCATTERED ELECTRON; CRACKING; COVER; TIME;

D O I：

10.1007/978-981-13-7603-0_70

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Steel-concrete interface microstructure plays an important role in the process of corrosion and concrete cover cracking. In this paper, porous band in the steel-concrete interface is quantitatively investigated using Backscattered electron (BSE) imaging. Corrosion of steel is induced by using impressed current, and then corrosion products at the porous band are quantitatively measured using BSE imaging. The results show that both porous band and corrosion products are non-uniformly distributed around steel bar surface. The non-uniform distribution of corrosion products is in line with that of porous band, suggesting that the non-uniformity of corrosion products layer is due to the porous band in the steel-concrete interface. The results also show that the thickness of corrosion products layer at the interface is also significantly affected by that of porous band.

引用

页码：733 / 743

页数：11

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