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Title |
An Experimental Study on Relation between Chloride Diffusivity and Microstructural Characteristics for GGBS Concrete
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Keywords |
미세구조 ; 내구성 ; 염화물 확산성 ; 고로슬래그 미분말(GGBS) ; 콘크리트 microstructure ; durability ; chloride diffusivity ; ground granulated blast furnace slag(GGBS) ; concrete |
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Abstract |
In order to evaluate the durability of reinforced concrete structures under chloride attack from sea water and frost damage, it is important to analyze both the microstructural characteristics of concrete and its diffusion resistance of concrete against chloride ingress. In this study, a relation between micro-pore structures of concrete obtained by the Mercury Intrusion Porosimetry and accelerated chloride diffusivity as well as long term chloride diffusivity were studied for ground granulated blast furnace slag(GGBS) concrete. Different water-cement ratio of 40, 45, 50% and different unit cement concrete of 300, 350, 400 or 450 kg/m3 of the GGBS concrete along with OPC concrete were used and freeze and thawing, and the change in diffusivity and microstructure were observed for both GGBS concrete and damaged GGBS concrete due to rapid freezing and thawing.
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