Corrosion-Induced Cracking of Concrete Elements Exposed to a Natural Marine Environment for Five Years

The mechanism of corrosion-induced concrete cover cracking has received greater attention in recent years. Most studies involve accelerated electrochemical techniques to measure the corrosion required to induce concrete cracking. Concrete cylinders with different water/cement ratios exposed to a nat...

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Bibliographic Details
Published in:Corrosion (Houston, Tex.) Tex.), 2013-11, Vol.69 (11), p.1122-1131
Main Authors: TORRES-ACOSTA, A. A, CASTRO-BORGES, P
Format: Article
Language:English
Subjects:
Applied sciences
Cement
Chloride
Concrete
Concretes
Corrosion
Corrosion environments
Corrosion mechanisms
Corrosion rate
Corrosion tests
Crack initiation
Crack propagation
Cylinders
Electrochemistry
Electrodes
Exact sciences and technology
Fracture mechanics
Humidity
Marine environment
Metals. Metallurgy
Parameters
Pitting (corrosion)
Ratios
Rebar
Reinforced concrete
Reinforcing steels
Stress corrosion cracking
Studies
Tropical climate
Water depth
Water-cement ratio
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Summary:The mechanism of corrosion-induced concrete cover cracking has received greater attention in recent years. Most studies involve accelerated electrochemical techniques to measure the corrosion required to induce concrete cracking. Concrete cylinders with different water/cement ratios exposed to a natural tropical marine environment were used to measure corrosion parameters such as time-to-corrosion initiation, apparent corrosion rate, cracking initiation, rebar radius loss to begin concrete cover cracking, and rebar pitting corrosion depth. Experimental results indicated a correlation between apparent corrosion rate values vs. rebar radius loss to begin concrete cover cracking, and average radius loss due to corrosion vs. maximum pit depth, during the remaining life period. The water/cement ratio is the most important parameter affecting crack generation and propagation, and apparent corrosion rate estimates.
ISSN:0010-9312
1938-159X
DOI:10.5006/0844