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Sharma, Umesh Kumar
- Calibration of Accelerated Corrosion Protocol for Reinforced Concrete Columns
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PDF Views:89
Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology, Roorkee 247 667, IN
1 Department of Civil Engineering, Indian Institute of Technology, Roorkee 247 667, IN
Source
Current Science, Vol 118, No 1 (2020), Pagination: 70-78Abstract
Researchers globally have adopted different techniques for simulating the effects of corrosion on reinforced concrete (RC) sections in different experimental studies. Application of Faraday’s law remains the most commonly used technique for designing and controlling accelerated corrosion regimes for testing RC sections. In this study, we analyse the competence of Faraday’s law-based methodology to simulate corrosion of RC structures in laboratory conditions. Twelve small-scale (300 × 300 × 500 mm) RC columns were subjected to Faraday’s law-based accelerated corrosion regime. Variables of the study were the degree of corrosion and grade of concrete. Damage in the RC section due to corrosion was evaluated in terms of surface distress, corrosion cracking, surface strain and gravimetric examination. Monitoring of the corrosion process through potentiometric measurements and comparing the results with the obtained gravimetric results yielded calibration factors for Faraday’s law-based procedure. The proposed calibration factors were then validated by designing and testing accelerated corrosion for large-scale RC columns.Keywords
Accelerated Corrosion, Calibration, Faraday’s Law, RC Members.Full Text
References
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- Identifying factors influencing corrosion rate in reinforced concrete under simulated natural climate
Abstract Views :127 |
PDF Views:77
Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, India, IN
2 Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, India, IN
1 Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai 400 076, India, IN
2 Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, India, IN
Source
Current Science, Vol 123, No 11 (2022), Pagination: 1327-1333Abstract
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 phasesKeywords
Chloride ions, corrosion rate, crack initiation and propagation, natural climatic conditions, reinforced concrete.Full Text
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