Probabilistic Assessment of CO<sub>2</sub> due to Concrete Repairs for Crack-Free Condition of Marine Concrete Structures

Abstract

An approach which combines the Latin Hypercube technique with Crank-Nicolson based finite difference approach is developed for probabilistic assessment of chloride diffusion in concrete structures with repairs. Two random variables, i.e., surface chloride and diffusion coefficient, are considered. Four repair strategies are proposed by varying the diffusion coefficient of repair concrete and the repair depth. A repair by cover replacement is applied at a critical time which the chloride content at a threshold depth reaches its critical value for concrete cracking. The critical time is defined as the repair time, which the CO2 due to repair concrete production and replacement processing occurs. By this method, the median of repair time and the probabilistic time-dependent CO2 can be assessed. The mean and the percentiles of cumulative total CO2 are compared.