Influence of mechanical cracks on the development of corrosion mechanism

Title: Influence of mechanical cracks on the development of corrosion mechanism
Author(s): Raoul François, Inamullah Khan, Hugo Mercado, Arnaud Castel
Paper category : conference
Book title: International RILEM Conference on Advances in Construction Materials Through Science and Engineering
Editor(s): Christopher Leung and K.T. WAN
ISBN: 978-2-35158-116-2
e-ISBN: 978-2-35158-117-9
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 578 - 585
Total Pages: 8
Nb references: 35
Language: English

Abstract: Corrosion is one of the major problems that reinforced concrete industry is facing now-a-days. Many research works have been carried out to investigate the influence of cracks on rebar corrosion. In this project ring shaped mortar samples with 8mm steel bar inside were cracked with different crack widths and then subjected to continuous wetting and drying cycles in salt solution having 35 g/L of NaCl, to accelerate the corrosion process in laboratory conditions. The samples were broken after 1.5 years and 2.5 years to observe the corrosion pattern. Results show that cracks whatever their width allows the corrosion onset at bottom of cracks and along the steel-concrete interface damaged zone caused by the creation of cracks. This process leads to corrosion cracks formation time dependant of the crack opening, which modify the environmental conditions at the level of steel leading to the generalization of corrosion all along the re-bars.

Online publication: 2011-10-31
Publication type : full_text
Public price (Euros): 0.00