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Factors controlling cracking of concrete affected by reinforcement corrosion

Alonso, C. / Andrade, C. / Rodriguez, J. / Diez, J. M.

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).

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Factors controlling cracking of concrete affected by reinforcement corrosion

Alonso, C. / Andrade, C. / Rodriguez, J. / Diez, J. M.

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).

Factors controlling cracking of concrete affected by reinforcement corrosion

Alonso, C. / Andrade, C. / Rodriguez, J. / Diez, J. M.

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).

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Title:

Factors controlling cracking of concrete affected by reinforcement corrosion

Contributors:

Alonso, C. (author) / Andrade, C. (author) / Rodriguez, J. (author) / Diez, J. M. (author)

Published in:

Materials and Structures ; 31

Publication date:

1998

ISSN:

DOI:

https://doi.org/10.1007/BF02480466

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Concrete Structure , Crack Width , Concrete Surface , Splitting Tensile Strength , Corrosion Rate

Classification:

BKL: 56.45 Baustoffkunde / 51.30 Werkstoffprüfung, Werkstoffuntersuchung
Local classification TIB: 275/6500 / 250/6500

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