Experimental Study on the Time-dependent Property of Chloride Diffusivity of Concrete

콘크리트의 염소이온 확산계수의 시간의존성에 대한 실험적 고찰

  • 최두선 (공주대학교 건설환경공학부) ;
  • 최재진 (공주대학교 건설환경공학부)
  • Received : 2009.01.02
  • Accepted : 2009.06.10
  • Published : 2009.07.31

Abstract

It is time-consuming to estimate chloride diffusivity of concrete by concentration difference test. For the reason chloride diffusivity of concrete is mainly tested by electrically accelerated method, which is accelerating the movement of chloride ion by potential difference. In this study, portland cement concrete and concrete containing with ground granulated blast-furnace slag (40 and 60% of cement by weight) with water-cementitious material ratio 40, 45, 50 and 60% were manufactured. To compare with chloride diffusivity calculated from the electrically accelerated test and immersed test in artifical seawater, chloride diffusivity tests were conducted. From the results of regression analysis, regression equation between accelerated chloride diffusivity and immersed chloride diffusivity was linear function. And the determinant coefficient was 0.96 for linear equation.

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