TY - JOUR A1 - Dang, V. H. A1 - François, R. A1 - L’Hostis, V. A1 - Meinel, Dietmar T1 - Propagation of corrosion in pre-cracked carbonated reinforced mortar T2 - Materials and Structures N2 - This paper deals with the initiation and propagation of corrosion in mortar specimens precracked under mechanical loading and carbonated in climate accelerated conditions (50 % CO2–65 % RH)for 15–23 weeks. Mechanical loading led to transverse macro-cracks and damage at the steel-mortar interface characterized by micro-cracks (cover controlled cracking) which favour the carbonation of crack walls and the interface with the steel bar. Wetting–drying cycles performed after carbonation favoured corrosion initiation all along the steel bar because of the carbonated interface and corrosion propagation because of the creation of corrosion cracks which appear to develop from the micro-cracks induced by the mechanical load. Results also show that rust develops all around the perimeter of the carbonated steel bar but that the corrosion layer is thicker in the lower half surface of the reinforcement than that observed in the upper half. Results indicate that the distribution and composition of corrosion products depend on the thickness of the rust layer and that the multilayered structure of rust depends mainly on its thickness. PB - Springer KW - Carbonation KW - Corrosion product KW - Steel bar KW - X-ray tomography PY - 2015 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/39057 AN - OPUS4-39057 SN - 1359-5997 VL - 48 IS - 8 SP - 2575 EP - 2595 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany