Abstract—Sulfate attack is one of the most damaging degradation mechanisms that can be accelerated by the increase of the internal stress due to filling the void within concrete with chemical products of gypsum and ettringite and subsequent expansion causes spalling and exfoliation of the concrete. As a result of occurring molecular diffusion, the diffusion coefficient of sulfate ion has played an important factor in existing empirical and mathematical models for its large impact on the extent of the attack. In this study, the expansion and diffusion coefficient are presented to represent a prediction model of life span degradation and a model equation of sulfate attack based on the mechanistic model is proposed.
Index Terms—Concrete, sulfate attack, diffusion, prediction model.
Hojae Lee is with the Structural Engineering Research Division, Korea Institute of Construction Technology, South Korea (e-mail: h.lee@kict.re.kr)
Myung-Sug Cho is with the Plant Construction & Engineering Laboratory, KHNP Central Research Institute, Korea Hydro & Nuclear Power Co., LTD, South Korea (e-mail: concrete@khnp.co.kr)
Jong-Suk Lee and Dogyeum Kim are with the Structural Engineering Research Division, Korea Institute of Construction Technology, South Korea (e-mail: jslee@kict.re.kr, dgkim@kict.re.kr)
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Cite:Hojae Lee, Myung-Sug Cho, Jong-Suk Lee, and Do-Gyeum Kim, "Prediction Model of Life Span Degradation under Sulfate Attack Regarding Diffusion Rate by Amount of Sulfate Ions in Seawater," International Journal of Materials, Mechanics and Manufacturing vol. 1, no. 3, pp. 251-255, 2013.
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