Bond of steel-mortar interface interfered by stray current

Bond of steel-mortar interface interfered by stray current

Chen, Zhipei (TU Delft Materials and Environment; Beijing Jiaotong University)
Koleva, D.A. (TU Delft Materials and Environment)
Schlangen, E. (TU Delft Materials and Environment)

2021

The focus of this work is to present test results on the bond of steel-mortar interface undergoing stray current. The bond strength, derived by pull-out tests, is correlated to the electrochemical response of the steel rebar and the properties of the mortar bulk matrix. The effects of curing regimes (in terms of duration of curing) and starting point of stray current are also investigated. It is found that stray current exerts bond degradation of the steel-mortar interface in all investigated cases, irrespective of the presence or absence of a corrodent (Cl⁻) in the external medium. For the ease of operation in lab tests, the stray current is generally simulated by anodic polarization, although fundamentally, the stray current effect on the steel surface is composed of both anodic and cathodic polarizations. Hence this work also differentiates the effects of stray current on steel-mortar bond, versus the effects of anodic polarization.

Bond strength
Corrosion
Curing
Electrochemical properties
Stray current

http://resolver.tudelft.nl/uuid:f69052c6-78d6-4c53-bbe8-8916b7de663a

https://doi.org/10.1016/j.cemconres.2021.106591

2022-03-07

0008-8846

Cement and Concrete Research, 150

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2021 Zhipei Chen, D.A. Koleva, E. Schlangen