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Factors controlling cracking of concrete affected by reinforcement corrosion
Abstract The present paper tries to contribute to quantifying the relationship between the amount of corrosion and cover cracking. The variables studied were: cover/diameter (c/ø), proportions of cement, w/c, cast position of the bar, transverse reinforcement and corrosion rate. The corrosion is accelerated by applying constant currents causing the rebar to act as an anode. The results indicate that the cracking process develops in two steps: generation and propagation. Radius losses of about 15–50 μm are necessary to generate the first visible crack (<0.1 mm width). The propagation follows a behaviour of the type: w (crack width in mm)=a+bx (radius loss in μm).
Résumé Ce travail tente de quantifier la relation entre le degré de corrosion et la fissuration du recouvrement de l'armature. Les variables étudiées ont été: recouvrement/diamètre (c/ø), dosage du ciment, eau/ciment, position de l'armature, armature transversale, et degré de corrosion. La corrosion est accélérée par l'application des courants constants qui font agir l'armature comme une anode. Les résultats indiquent que le processus de fissuration se développe en deux temps: génération et propagation. Une réduction du rayon de l'armature d'environ 15–50 μm est nécessaire pour produire la première fissure visible (ouverture <0.1 mm). À la propagation, le comportement suit l'expression: w (largeur de la fissure en mm) =a+bx (réduction du rayon en μm).
Factors controlling cracking of concrete affected by reinforcement corrosion
Abstract The present paper tries to contribute to quantifying the relationship between the amount of corrosion and cover cracking. The variables studied were: cover/diameter (c/ø), proportions of cement, w/c, cast position of the bar, transverse reinforcement and corrosion rate. The corrosion is accelerated by applying constant currents causing the rebar to act as an anode. The results indicate that the cracking process develops in two steps: generation and propagation. Radius losses of about 15–50 μm are necessary to generate the first visible crack (<0.1 mm width). The propagation follows a behaviour of the type: w (crack width in mm)=a+bx (radius loss in μm).
Résumé Ce travail tente de quantifier la relation entre le degré de corrosion et la fissuration du recouvrement de l'armature. Les variables étudiées ont été: recouvrement/diamètre (c/ø), dosage du ciment, eau/ciment, position de l'armature, armature transversale, et degré de corrosion. La corrosion est accélérée par l'application des courants constants qui font agir l'armature comme une anode. Les résultats indiquent que le processus de fissuration se développe en deux temps: génération et propagation. Une réduction du rayon de l'armature d'environ 15–50 μm est nécessaire pour produire la première fissure visible (ouverture <0.1 mm). À la propagation, le comportement suit l'expression: w (largeur de la fissure en mm) =a+bx (réduction du rayon en μm).
Factors controlling cracking of concrete affected by reinforcement corrosion
Alonso, C. (author) / Andrade, C. (author) / Rodriguez, J. (author) / Diez, J. M. (author)
Materials and Structures ; 31 ; 435-441
1998-08-01
7 pages
Article (Journal)
Electronic Resource
English
Factors controlling cracking of concrete affected by reinforcement corrosion
| British Library Online Contents | 1998
Factors controlling cracking of concrete affected by reinforcement corrosion
| Online Contents | 1998
Factors controlling cracking of concrete affected by reinforcement corrosion
| Online Contents | 1998
Concrete cracking and corrosion of reinforcement
British Library Online Contents | 1993