TY - JOUR
T1 - The effect of the steel–concrete interface on chloride-induced corrosion initiation in concrete
T2 - a critical review by RILEM TC 262-SCI
AU - Angst, Ueli M.
AU - Geiker, Mette R.
AU - Alonso, Maria Cruz
AU - Polder, Rob
AU - Isgor, O. Burkan
AU - Elsener, Bernhard
AU - Wong, Hong
AU - Michel, Alexander
AU - Hornbostel, Karla
AU - Gehlen, Christoph
AU - François, Raoul
AU - Sanchez, Mercedes
AU - Criado, Maria
AU - Sørensen, Henrik
AU - Hansson, Carolyn
AU - Pillai, Radhakrishna
AU - Mundra, Shishir
AU - Gulikers, Joost
AU - Raupach, Michael
AU - Pacheco, José
AU - Sagüés, Alberto
N1 - Publisher Copyright:
© 2019, RILEM.
PY - 2019/8/1
Y1 - 2019/8/1
N2 - The steel–concrete interface (SCI) is known to influence corrosion of steel in concrete. However, due to the numerous factors affecting the SCI—including steel properties, concrete properties, execution, and exposure conditions—it remains unclear which factors have the most dominant impact on the susceptibility of reinforced concrete to corrosion. In this literature review, prepared by members of RILEM technical committee 262-SCI, an attempt is made to elucidate the effect of numerous SCI characteristics on chloride-induced corrosion initiation of steel in concrete. We use a method to quantify and normalize the effect of individual SCI characteristics based on different literature results, which allows comparing them in a comprehensive context. It is found that the different SCI characteristics have received highly unbalanced research attention. Parameters such as w/b ratio and cement type have been studied most extensively. Interestingly, however, literature consistently indicates that those parameters have merely a moderate effect on the corrosion susceptibility of steel in concrete. Considerably more pronounced effects were identified for (1) steel properties, including metallurgy, presence of mill scale or rust layers, and surface roughness, and (2) the moisture state. Unfortunately, however, these aspects have received comparatively little research attention. Due to their apparently strong influence, future corrosion studies as well as developments towards predicting corrosion initiation in concrete would benefit from considering those aspects. Particularly the working mechanisms related to the moisture conditions in microscopic and macroscopic voids at the SCI is complex and presents major opportunities for further research in corrosion of steel in concrete.
AB - The steel–concrete interface (SCI) is known to influence corrosion of steel in concrete. However, due to the numerous factors affecting the SCI—including steel properties, concrete properties, execution, and exposure conditions—it remains unclear which factors have the most dominant impact on the susceptibility of reinforced concrete to corrosion. In this literature review, prepared by members of RILEM technical committee 262-SCI, an attempt is made to elucidate the effect of numerous SCI characteristics on chloride-induced corrosion initiation of steel in concrete. We use a method to quantify and normalize the effect of individual SCI characteristics based on different literature results, which allows comparing them in a comprehensive context. It is found that the different SCI characteristics have received highly unbalanced research attention. Parameters such as w/b ratio and cement type have been studied most extensively. Interestingly, however, literature consistently indicates that those parameters have merely a moderate effect on the corrosion susceptibility of steel in concrete. Considerably more pronounced effects were identified for (1) steel properties, including metallurgy, presence of mill scale or rust layers, and surface roughness, and (2) the moisture state. Unfortunately, however, these aspects have received comparatively little research attention. Due to their apparently strong influence, future corrosion studies as well as developments towards predicting corrosion initiation in concrete would benefit from considering those aspects. Particularly the working mechanisms related to the moisture conditions in microscopic and macroscopic voids at the SCI is complex and presents major opportunities for further research in corrosion of steel in concrete.
KW - Corrosion
KW - Durability
KW - Inhomogeneity
KW - Interfacial transition zone
KW - Steel–concrete interface
KW - Variability
UR - http://www.scopus.com/inward/record.url?scp=85070701775&partnerID=8YFLogxK
U2 - 10.1617/s11527-019-1387-0
DO - 10.1617/s11527-019-1387-0
M3 - Article
AN - SCOPUS:85070701775
SN - 1359-5997
VL - 52
JO - Materials and Structures/Materiaux et Constructions
JF - Materials and Structures/Materiaux et Constructions
IS - 4
M1 - 88
ER -