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Identifying factors influencing corrosion rate in reinforced concrete under simulated natural climate


Affiliations
1 Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, India, India
2 Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, India, India
 

The influence of various parameters on corrosion rate in reinforced concrete was examined using analysis of variance for crack initiation and crack propagation phases. Water–cement (w/c) ratio was found to be the most significant factor before the onset of concrete surface crack, followed by the time of wetting. In the crack propagation phase, contribution of w/c ratio reduced while time of wetting and external chloride concentration became prominent. The concrete cover values of 30 mm and 60 mm affected the corrosion rate marginally. The diameter of reinforcing steel and spacing between bars were the least contributing factors to the corrosion rate under both phases

Keywords

Chloride ions, corrosion rate, crack initiation and propagation, natural climatic conditions, reinforced concrete.
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  • Identifying factors influencing corrosion rate in reinforced concrete under simulated natural climate

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Authors

Aditi Chauhan
Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, India, India
Umesh Kumar Sharma
Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, India, India

Abstract


The influence of various parameters on corrosion rate in reinforced concrete was examined using analysis of variance for crack initiation and crack propagation phases. Water–cement (w/c) ratio was found to be the most significant factor before the onset of concrete surface crack, followed by the time of wetting. In the crack propagation phase, contribution of w/c ratio reduced while time of wetting and external chloride concentration became prominent. The concrete cover values of 30 mm and 60 mm affected the corrosion rate marginally. The diameter of reinforcing steel and spacing between bars were the least contributing factors to the corrosion rate under both phases

Keywords


Chloride ions, corrosion rate, crack initiation and propagation, natural climatic conditions, reinforced concrete.

References





DOI: https://doi.org/10.18520/cs%2Fv123%2Fi11%2F1327-1333