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Title |
Experimental Study on the Relationship between Time-Dependent Chloride Diffusion Coefficient and Compressive Strength
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DOI |
https://doi.org/10.4334/JKCI.2012.24.6.715 |
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Keywords |
고성능 콘크리트 ; 시간의존성 ; 촉진확산계수 ; 강도 ; 겉보기확산계수 high performance concrete ; time-dependency ; accelerated diffusion coefficient ; strength ; apparent diffusion coefficient |
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Abstract |
Since strength and diffusion coefficient of concrete, representative concrete properties that in change with age, the time effect must be considered in the analysis of chloride penetration. In this study, an evaluation of correlation between accelerated diffusion coefficient, apparent diffusion coefficient, and compressive strength in high performance concrete with various mineral admixtures such as ground granulated blast furnace slag, fly ash, and silica fume was performed. For this work, thirty mix proportions were prepared. Accelerated diffusion coefficients at the age of 28, 91, 180, and 270 days were evaluated. For apparent diffusion coefficient, submerging test for 6 months was performed. For evaluation of compressive strength with ages, the compressive strength test was carried out at an age of 7, 28, 91, 180 days. The results of accelerated diffusion coefficient, apparent diffusion coefficient, and strength were compared, and the correlation was analyzed considering time dependency. From this study, linear relationship between accelerated diffusion and apparent diffusion coefficient were obtained regardless of concrete age. The linear relations were also observed in strength-accelerated diffusion coefficient and strength-apparent diffusion coefficient regardless of concrete age.
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