한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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고강도 시멘트 복합체의 배합조건에 따른 압축강도 발현 특성

Characteristics of Compressive Strength Development of High Strength Cement Composites Depending on Its Mix Design

  • 정연웅 ((재)한국건설생활환경시험연구원 건설기술연구센터) ;
  • 오성우 ((재)한국건설생활환경시험연구원 건설기술연구센터) ;
  • 조영근 ((재)한국건설생활환경시험연구원 건설기술연구센터) ;
  • 정상화 ((재)한국건설생활환경시험연구원 건설본부) ;
  • 김주형 ((재)한국건설생활환경시험연구원 건설기술연구센터)
  • Jeong, Yeon-Ung (Construction Technology Research Center, Korea Conformity Laboratories) ;
  • Oh, Sung-Woo (Construction Technology Research Center, Korea Conformity Laboratories) ;
  • Cho, Young-Keun (Construction Technology Research Center, Korea Conformity Laboratories) ;
  • Jung, Sang-Hwa (Construction Division, Korea Conformity Laboratories) ;
  • Kim, Joo-Hyung (Construction Technology Research Center, Korea Conformity Laboratories)
  • 투고 : 2021.11.08
  • 심사 : 2021.11.15
  • 발행 : 2021.12.30
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초록

본 연구에서는 고강도 시멘트 복합체의 배합조건에 따른 압축강도 발현 특성을 분석하기 위해 물/결합재비, OPC 대비 실리카 흄의 함량 및 단위 결합재량을 변수로 총 64개의 배합조건과 2종류의 양생 조건으로 배합실험 및 압축강도 측정을 실시하였다. 일반적인 OPC 콘크리트와 유사하게 물/결합재비의 증가는 고강도 시멘트 복합체의 압축강도를 감소하는 것으로 나타났으며, 상온 양생 시편의 경우 재령일에 따른 압축강도 증가가 뚜렷하게 발생하는 것으로 조사되었다. 하지만 고온 양생을 실시하는 경우 재령일에 따른 압축강도 증가는 관찰되지 않았다. OPC 대비 실리카 흄의 함량이 25%에서 15%로 낮아지는 경우 강도 변화는 미미한 것으로 조사되었으나, 15%에서 0% 감소하는 경우 뚜렷한 강도 감소가 식별되며, 물/결합재비가 낮은 경우 이러한 현상은 더욱 두드러지는 것으로 조사되었다. 단위 결합재량의 840kg/m3인 경우 압축강도 발현이 가장 우수한 것으로 나타났으며, 실리카 흄 함량이 낮은 경우 단위 결합재량 감소에 따른 압축강도 저하가 뚜렷해지는 것으로 조사되었다.

This study investigates the compressive strength of high-strength cement composites with 64 mixture designs and 2 curing conditions. The cement composites were designed with varying water-to-binder ratios, silica fume content to cement, and binder content per unit volume of cement composite to explore compressive strength development depending on its mix design. An increase in the water-to-binder ratio decreased the compressive strength of the composites, having consistency with the trend in normal concrete. The compressive strength increased with ages at an ambient curing temperature, but it was not identified at high-temperature curing. The compressive strength development was negligible in case that silica fume content to OPC is 15%~25%, but a decrease in the con ten t below 15% reduced compressive stren gth. It was more obvious in the specimen of low water-to-binder ratio. The specimen with 840kg/m3 of binder content per unit volume had the highest compressive strength in this study, and the decrease in binder content reduced the compressive strength of high strength cement composites in low silica fume content.

키워드

과제정보

본 연구는 국토교통부의 재원으로 국토교통과학기술진흥원의 연구비 지원을 받아 수행되었습니다(과제번호: 21NANO-B156177-02). 이에 감사드립니다.

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