A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Critical chloride threshold values as a function of cement type and steel surface condition
Abstract This paper presents the application of a new test protocol developed for determining chloride threshold values initiating corrosion in reinforced concrete. The experimental set-up was described in previous work and is based on the intrinsic localized aspect of chloride-induced corrosion. The test protocol is also based on the concept of anodic control of corrosion initiation, and therefore independent of the area of passive steel. The test method is applied to mortar and concrete formulations with different binders and steel surface conditions. Chloride-binding isotherms were also determined to allow the transition from total to free chlorides. It is found that the test protocol is rapid and applicable to all formulations. The experimental results provide an understanding of the influence of binder type, w/b ratio and porosity on chloride-induced corrosion initiation. As expected, the steel surface condition is shown to have an important overall effect on corrosion initiation.
Highlights New test protocol to determine the chloride threshold values initiating corrosion in concrete. The test protocol could be applicable to all mortar and concrete compositions. The influence of binder type, porosity, and steel surface condition is studied.
Critical chloride threshold values as a function of cement type and steel surface condition
Abstract This paper presents the application of a new test protocol developed for determining chloride threshold values initiating corrosion in reinforced concrete. The experimental set-up was described in previous work and is based on the intrinsic localized aspect of chloride-induced corrosion. The test protocol is also based on the concept of anodic control of corrosion initiation, and therefore independent of the area of passive steel. The test method is applied to mortar and concrete formulations with different binders and steel surface conditions. Chloride-binding isotherms were also determined to allow the transition from total to free chlorides. It is found that the test protocol is rapid and applicable to all formulations. The experimental results provide an understanding of the influence of binder type, w/b ratio and porosity on chloride-induced corrosion initiation. As expected, the steel surface condition is shown to have an important overall effect on corrosion initiation.
Highlights New test protocol to determine the chloride threshold values initiating corrosion in concrete. The test protocol could be applicable to all mortar and concrete compositions. The influence of binder type, porosity, and steel surface condition is studied.
Critical chloride threshold values as a function of cement type and steel surface condition
Chalhoub, Chantal (author) / François, Raoul (author) / Carcasses, Myriam (author)
2020-04-15
Article (Journal)
Electronic Resource
English
Surface Condition Effects on Critical Chloride Threshold of Steel Reinforcement
| Online Contents | 2005
Surface Condition Effects on Critical Chloride Threshold of Steel Reinforcement
| British Library Online Contents | 2005
Methods for Determination of Chloride Threshold Values for Steel in Concrete
| British Library Conference Proceedings | 2002