Article | . 2018 Vol. 9, Issue. 1
Time effect of diffusion on service life in RC structure exposed to chloride ingress considering failure probability and design parameters



Department of Plant and Architectural Engineering, Kyonggi University1
Department of Civil and Environmental Engineering, Hannam University2




2018.. 2:17


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The current durability design methodology contains deterministic and probabilistic methods. The results vary significantly with changing design parameters and an effect of time. Time effects on diffusion and surface chloride content affect the intruded chloride content, which is directly related with service life and PDF (probability of durability failure). In this work, the time effects on diffusion coefficient and surface chloride content are considered in calculation framework of PDF, and the results of predicted service life from the two different methods are compared considering five design parameters. The effects of cover depth and time-exponent are more dominant than the other parameters, which show 2.38~5.28 and 1.95~4.08 of changing gradient to service life, respectively. Through adopting the effects on probabilistic design method, reasonable service life is obtained with verification that increasing time-exponent through mineral admixture replacement and enhancement of cover depth is very effective on extension of service life.



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