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This paper presents an experimental investigation into the residual capacity of corroded reinforcing bars. By performing both accelerated and simulated corrosion tests on bare bars and on bars embedded in concrete, the mechanism of the reduction of the capacity of corroded reinforcement was investigated. The influence of type and diameter of reinforcement on its residual capacity is discussed. The experimental results show that, due to local attack penetration, the residual cross-section of a corroded bar is no longer round and varies considerably along its circumference and its length. Although the force–extension curves of corroded bars are similar to those of noncorroded bars for up to 16% corrosion, their residual yield and ultimate forces decrease more rapidly than their average cross-sectional area and, therefore, their residual strength decreases significantly. Even though the residual capacity of corroded small diameter and/or plain bars reduces more than that of large diameter or ribbed ones, differences are not significant and can be neglected. Finally, a simple equation is proposed to predict the residual capacity of corroded reinforcing bars in practice.

Item Type:	Refereed Article
Keywords:	behaviour, corrosion, reinforcement, strength
Research Division:	Engineering
Research Group:	Civil engineering
Research Field:	Structural engineering
Objective Division:	Construction
Objective Group:	Construction materials performance and processes
Objective Field:	Metals
UTAS Author:	Chan, AHC (Professor Andrew Chan)
ID Code:	103247
Year Published:	2005
Web of Science® Times Cited:	329
Deposited By:	Office of the School of Engineering
Deposited On:	2015-09-30
Last Modified:	2015-10-07
Downloads:	1,176 View Download Statistics