Evaluation on Parameters of Chloride Induced Damage Based on Actual Data in Situ

Tsutsumi, Tomoaki; Shirai, Shinichi; Yasuda, Noboru; Matsushima, Manabu

doi:10.2208/jscej.1996.544_33

Cited by 6 publications

(1 citation statement)

References 3 publications

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“…Moreover, it is also essential to evaluate the chloride ion diffusion coefficient and the critical chloride content of rebars in concrete containing admixtures to assess and predict the durability of concrete [40][41][42][43][44]. A lot of research has been done on the critical chloride content of rebars embedded in the concrete or on the chloride ion diffusion coefficient of concrete depending on the types of concrete binders [45][46][47][48][49]. In addition, research has been conducted to predict the service life of the concrete by using data from previous publications [50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Variation in Service Life on RC Structure According to Concrete Binder Type

Park

Jung

2020

Materials

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When an additive is used to replace a certain amount of cement, a concrete pore structure becomes dense. Thus, it results in inhibiting the penetration of chlorine ions and suppressing corrosion of reinforcing bars. However, the pH level of the concrete decreases, and it deteriorates the performance of the passive film formed on the surface of the rebars embedded in the concrete. Therefore, in this study, the service lives of reinforced concrete containing different types of concrete binders were predicted and compared. The chloride ion diffusion coefficients of concretes with various binders were measured, and the critical chloride content of the rebar was assessed by the real-time monitoring on the corrosion initiation time of the rebar embedded in concrete. Moreover, Fick’s 2nd law was applied to predict when the chloride content at the 40 mm depth of cover reached the critical chloride content based on the chloride ion diffusion coefficient. It was observed that the service life of S6 (OPC 40% + GGBFS 60%) was the highest, followed by TBC (OPC 40% + GGBFS 40% + FA 20%), S3 (OPC 70% + GGBFS 30%), and OPC (OPC 100%).

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