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혼화재를 혼입한 콘크리트의 염화물 확산 평가에 관한 연구
박정준 ( Park Jung-jun ),김도겸 ( Kim Do-gyeum ),김성욱 ( Kim Sung-wook ),하진규 ( Ha Jin-gyu ) 한국구조물진단유지관리공학회 2001 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.5 No.1
To improve the quality of concrete, we usually consider the reduction of water/cement ratio, the increase of concrete cover depth and the use of mineral admixtures. Reportedly, the use of admixtures make concrete more durable and tighten against water. But, it is needed to study more about the relationship between the admixtures and the chloride ion diffusion. Therefore, in this study, we try to analyze the chloride ion diffusion properties of concrete when mixed with the mineral admixtures such as fly-ash, slag and silica fume through the compressive strength, empirical void and air permeability test.
전기촉진시험 방법에 의한 혼화재 혼입 콘크리트의 염화물 저항성 평가에 관한 연구
박정준 ( Park¸ Jung-jun ),김도겸 ( Kim¸ Do-gyeum ),고경택 ( Go¸ Gyung-taek ),김성욱 ( Kim¸ Sung-wook ),하진규 ( Ha¸ Jin-gyu ) 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.6 No.2
The test method ASTM C 1202 is critically examined in this paper. It is observed that the total charge passed is not a good basis for classification of concrete quality when different binders(such as fly-ash, bottom ash and silica fume etc etc) are considered. A change of voltage and simple modification test method are examined. The modification involved performing of additional test using distilled water as electrolyte. The difference in the total charges passed obtained between change of voltage in concrete and test performed in water is suggested as an indicator for concrete quality. The chloride ion penetration for concrete with mineral admixtures can correctly estimated in considring pozzolan reacts with long term ages of the concrete.
플라이애시를 사용한 콘크리트의 염화물 저항성 촉진시험 방법에 관한 검토
박정준 ( Park¸ Jung-jun ),구현본 ( Koo¸ Hyun-bon ),김도겸 ( Kim¸ Do-gyeum ),김성욱 ( Kim¸ Sung-wook ),하진규 ( Ha¸ Jin-gyu ) 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.6 No.1
The test method ASTM C 1202 "Electrical indication of concrete’s ability to resist chloride ion penetration" is critically examined in this paper. It is observed that the total charge passed is not a good basis for classification of concrete quality when different binders (such as fly-ash etc) are considered. A simple modification test method is proposed. The modification involved performing of additional test using distilled water as electrolyte. The difference in the total charges passed obtained between ASTM C 1202 test and test performed in water is suggested as an indicator for concrete quality. By using the modified total charge passed, improvements in relationship to direct measurements of chloride ion penetration are observed.