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Title |
Modeling on Compressive Strength of Concrete Exposed to Temperature-Dependent Sulfate Attack
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Authors |
최지완(Ji-Woan Choi) ; 황지원(Ji-Won Hwang) ; 권성준(Seung-Jun Kwon) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.6.49 |
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Keywords |
황산염 침해; 확산계수; 온도; 열화; 압축 강도 Sulfate attack; Diffusion coefficient; Temperature; Deterioration; Compressive strength |
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Abstract |
The sulfate diffusion coefficient is an important durability design factor for evaluating sulfate-deterioration depth, and it varies with exterior temperature. In this study, the materials used for UAE nuclear power plant were delivered and concrete was prepared with the materials, and the sulfate diffusion coefficient was evaluated. The diffusion coefficients were obtained from 20°C to 50°C with 10°C intervals through natural diffusion test, and the probabilistic information for the diffusivity was derived through average and standard deviation from 3 samples. In addition, the diffusion coefficients were quantified as a function of temperature through nonlinear regression analysis. For the 1-D deteriorated section due to sulfate ingress, compressive strength evaluation technique was proposed with three parameters which can handle the increasing deterioration depth due to raised temperature.
The proposed technique effectively showed the increasing diffusivity and the reduced compressive strength with increasing temperature.
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