Research Articles | Challenge Journal of Concrete Research Letters

Economic Service Life of RC Structure Based on Corrosion Initiation Time

Md. Shafiqul Islam

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Target service life of the structure specified by the codes and standards for RC infrastructures has failed to achieve due to uncertainties at the time of construction of structure and at exposure to real environment. Moreover, the more resistivity of the cover concrete, the larger is the service life and thus higher is the cost incurred by the owner. Therefore, economic service life (ESL) has more value than considering engineering service life, where both the failure and the cost consider parallel in the prediction of service life.A statistical model to determine the time to initiate corrosion due to chloride attack to the RC member and subsequent repair considering all costs incorporated is taken into account in this research. Cost minimization model is used to calculate economic service life where initial cost, repair cost and gain from revenue for the structure are paid attention. Further, a correlation between corrosion initiation time (CIT) and economic service life (ESL) is proposed.


corrosion initiation time; economic service life; random sampling

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