Bond Stress Assessment of Corroded and Un-Corroded Reinforcement Inside the Concrete

Authors

  • Sultan A. Daud, Mustafa Hameed Al-Allaf, Omer K. Fayadh, Raid A. Daud, Adel A. Al-Azzawi

Abstract

Corrosion of steel bars is considered to be one of the major factors affecting durability of the concrete structures. In this paper, the bond stress response of corroded and un-corroded embedded bars inside the concrete was assessment experimentally. Twelve cubes were tested experimentally for that purpose. The main parameter of this work was the reinforcement condition, corroded, un-corroded and epoxy coted reinforcement. The corrosion process was executed for 90 days duration. It was found that bond stress for samples subjected to long-term corrosion (for a period of 90 days corrosion) was reduced by approximately 54.4% and the slip was reduced also by a bout 30%. Moreover, the bond stress was reduced by 26% for samples where the reinforcement coated with epoxy. Finally, bond stiffness between the concrete and the reinforcement was deteriorated in the corroded samples more than that in the samples which treated by the epoxy.

Published

2020-02-29

Issue

Section

Articles