Service life prediction model for reinforced concrete structures due to chloride ingress

Abstract

The present paper tries to contribute to quantify the relationship between the mixed factors which directly or indirectly affect the corrosion of reinforcement, with corrosion current and service life. The variables studied were water cement ratio, concrete cover, bar diameter and exposure condition. Effect of percentage of fly ash and silica fume was studied considering general corrosion models to study the effect of corrosion pattern for the same. MATLAB code was developed and using Monte-Carlosimulation technique set of data was gathered to observe the effect of various factors on service life. Multiple regression analysis was implemented to obtain relationship of corrosion current with different factors like concrete cover, bar diameter, water to cement ratio, percentage of loss of reinforcement due to corrosion and time after corrosion initiation.