A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Non-uniform corrosion states of rebar in concrete under chloride environment
This study proposes and verifies a numerical framework that can efficiently quantify non-uniform corrosion penetration depth along the perimeter of the rebar in concrete exposed to chloride environment. Moreover, this framework considers the effects of rebar size and location on the process of chloride ingress into concrete and evaluates the non-uniform corrosion states that correspond to two scenarios of corrosion penetration depth: corrosion of segment of the rebar and uneven corrosion along the rebar perimeter. The larger the rebar, in general, the bigger the obstruction, and therefore, the higher the chloride build-up. The minimum cover thickness required to guarantee a certain number of corrosionfree service life is observed to increase not only with the increase in water-to-binder ratio but also with the rebar locations and sizes. The spatial locations of maximum corrosion penetration depth along the perimeter of the rebar are observed to be different for corner and middle bars. Qualitative comparisons of the evaluated non-uniform corrosion states with the variety of available laboratory and field data show good agreement.
Non-uniform corrosion states of rebar in concrete under chloride environment
This study proposes and verifies a numerical framework that can efficiently quantify non-uniform corrosion penetration depth along the perimeter of the rebar in concrete exposed to chloride environment. Moreover, this framework considers the effects of rebar size and location on the process of chloride ingress into concrete and evaluates the non-uniform corrosion states that correspond to two scenarios of corrosion penetration depth: corrosion of segment of the rebar and uneven corrosion along the rebar perimeter. The larger the rebar, in general, the bigger the obstruction, and therefore, the higher the chloride build-up. The minimum cover thickness required to guarantee a certain number of corrosionfree service life is observed to increase not only with the increase in water-to-binder ratio but also with the rebar locations and sizes. The spatial locations of maximum corrosion penetration depth along the perimeter of the rebar are observed to be different for corner and middle bars. Qualitative comparisons of the evaluated non-uniform corrosion states with the variety of available laboratory and field data show good agreement.
Non-uniform corrosion states of rebar in concrete under chloride environment
Ungleichmäßiger Korrosionszustand der Armierung in Beton im chloridhaltigen Medium
Muthulingam, S. (author) / Rao, B.N. (author)
Corrosion Science ; 93 ; 267-282
2015
16 Seiten, 14 Bilder, 3 Tabellen, 61 Quellen
Article (Journal)
English
Betonstahl , Chlorid , Korrosionsmechanismus , örtliche Korrosion , Simulationsmodell , numerisches Verfahren , Lokalelement , Korrosionseinleitung , Diffusion , Korrosionsgeschwindigkeit , Algorithmus , Temperatureinfluss , feuchte Atmosphäre , Verteilungsfunktion , räumliche Verteilung , Schichtdicke , geometrische Form
Non-uniform corrosion states of rebar in concrete under chloride environment
| British Library Online Contents | 2015
Rebar corrosion in chloride environment
| Elsevier | 2010
Rebar corrosion in chloride environment
| British Library Online Contents | 2011
Rebar corrosion in chloride environment
| Online Contents | 2011
Crevice corrosion of steel rebar in chloride-contaminated concrete
| Elsevier | 2021