Proceedings of the Korean Institute of Building Construction Conference (한국건축시공학회:학술대회논문집)

The Korean Institute of Building Construction (한국건축시공학회)
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An experimental study on carbonation resistance of Mg(OH)2 mixed cement paste

Mg(OH)2 혼입 시멘트 페이스트의 탄산화 저항성에 관한 실험적 연구

  • 진정심 (한양대학교 건축시스템공학과) ;
  • 이윤수 (한양대학교 건축시스템공학과) ;
  • 이한승 (한양대학교 건축공학과)
  • Published : 2017.05.17
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Abstract

Corrosion of reinforcement is the main factors affecting the durability of reinforced concrete in the world which lead to the failure of structures of reinforced concrete buildings. In this research, mixed brucite(Mg(OH)2) into ordinary portland cement paste in ratio of 5, 10 and 15% as a kind of CO2 fixation material. Samples were exposed to an accelerated carbonation enslavement of 20% CO2 concentration, 60% relative humidity, and a temperature of 20℃ until tested at 3d, 7d, 14d and 28d. After 28d CO2 accelerated curing, in the paste containing MH megnesian calcite was found by XRD and SEM-EDX. Meanwhile, paste containing Mg(OH)2 exhibit the better pore distribution than ordinary portland cement paste and relatively good compressive strength.

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