한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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초기 재령에서 비소성 황토 혼입 고강도 콘크리트의 압축강도 발현 예측을 위한 초음파 속도법 검토

UPV Prediction Method on Compressive Strength of High Strength Concrete Mixed with Non-Sintered Hwangto at Early Age

  • 남영진 (세명대학교 소방방재공학과) ;
  • 김원창 (세명대학교 소방방재공학과) ;
  • 최형길 (경북대학교 건축공학과) ;
  • 김규용 (충남대학교 건축공학과 ) ;
  • 이태규 (세명대학교 소방방재학과)
  • Young-Jin Nam (Department of Fire and Disaster Prevention, Semyung University) ;
  • Won-Chang Kim (Department of Fire and Disaster Prevention, Semyung University) ;
  • Hyeong-Gil Choi (School of Architecture, Civil Environment and Energy Engineering, Kyungpook University) ;
  • Gyu-Yong Kim (Department of Architectural Engineering, Chungnam University) ;
  • Tae-Gyu Lee (Department of Fire and Disaster Prevention, Semyung University)
  • 투고 : 2023.03.16
  • 심사 : 2023.05.15
  • 발행 : 2023.06.30
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초록

본 연구에서는 초기 재령에서 NSH(Non-sintered Hwangto) 치환율에 따른 고강도 콘크리트의 역학적 특성을 평가하였다. NSH의 치환율은 15 % 및 30 %로 설정했다. 평가 항목은 압축강도와 UPV(Ultrasonic pulse velocity)로 설정하였으며, 최종적으로 UPV분석을 통해 압축강도 예측 방정식을 제안하였다. 압축강도와 UPV에서는 NSH 치환율이 증가할수록 낮은 강도 및 UPV를 보였다. 또한 압축강도와 UPV의 상관관계 분석 결과, 상관계수(R2)는 NC33(Normal concrete)은 0.99, NSHC(Non-sintered Hwangto Concrete)33-15는 0.97, 그리고 NSHC33-30은 0.94로 높은 상관관계를 나타냈다.

In this study, the mechanical properties of high-strength concrete according to the substitution rate of NSH(Non-sintered Hwangto) as an alternative material for cement were measured and evaluated. Through UPV(Ultrasonic pulse velocity) analysis, the compressive strength prediction equation was proposed, and the substitution rate of NSH was set at 15 % and 30 %. The evaluation items were compressive strength and UPV, and the curing period was set to 24 hours. In compressive strength and UPV, as the NSH substitution rate increased, lower strength and lower UPV were shown. In addition, the correlation number(R2 ) between compressive strength and UPV was 0.99 for NC(Normal Concrete), 0.97 for NSHC(Non-sintered Hwangto Concrete)33-15, and 0.94 for NSHC33-30.

키워드

과제정보

This work was supported by the Technology development Program(S3270705) funded by the Ministry of SMEs and Startups(MSS, Korea).

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