한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
권호 표지
DOI QR코드

DOI QR Code

순환잔골재를 활용한 콘크리트의 물리·역학적 특성에 관한 실험적 연구

An Experimental Study on the Physical and Mechanical Properties of Concrete Using Recycled Sand

  • 김정호 (한라엔컴 기술연구소) ;
  • 성종현 (한라엔컴 기술연구소) ;
  • 이승엽 (한라엔컴 기술연구소) ;
  • 권구혁 (한라엔컴 기술연구소) ;
  • 이세현 (한국건설기술연구원 건축도시연구소)
  • 투고 : 2017.08.17
  • 심사 : 2017.11.21
  • 발행 : 2017.12.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

본 연구에서는 KS F 2573 콘크리트용 순환골재 기준에 적합한 순환잔골재의 치환율에 따른 콘크리트 특성을 검토하였다. 물리적 특성으로 슬럼프, 공기량, 경시변화, 압축강도에 대한 연구를 수행하였으며, 순환잔골재 재활용 활성화를 위한 기초자료를 제공하고자 한다. 슬럼프 경시변화 실험 결과 순환잔골재의 치환율 증가에 따라 슬럼프 경시변화 감소율은 커지는 것으로 나타났다. 공기량 측정 결과 순환잔골재의 치환율 증가에 따라 공기량 또한 증가하는 것으로 나타났으며, 경시변화의 경우 공기량 감소율은 낮아지는 것을 확인하였다. 반면 100% 치환 시 천연골재콘크리트보다 높은 공기량을 나타내 강도저하가 발생할 것으로 사료된다. 압축강도의 실험 결과 순환잔골재 치환율 증가에 따라 강도저감이 발생했으며, 24MPa 배합 결과 30% 치환 시 천연골재콘크리트와 동등한 강도발현을 나타냈다. 위의 결과를 토대로 순환잔골재 30%치환 시 천연골재콘크리트와 동등한 물리적 특성을 나타내 KS F 2573 콘크리트용 순환골재 기준에 적합한 순환잔골재 치환 시 목표강도 24MPa의 30%가 적합한 것으로 판단된다. 추후 순환골재의 사용 활성화를 위해 순환잔골재 개질을 통한 품질개선이 필요하며, 후속연구로서 개질된 순환잔골재를 이용한 순환잔골재콘크리트의 물리적 특성 평가가 수행되어야 할 것으로 판단된다.

This study examined concrete characteristics depending on the replacement ratio of recycled fine aggregates, which suits the KS F 2573 concrete recycled aggregate standard. As physical properties, slump, air content, changes in the elapse of time and compressive strength were studied in order to provide basic data for activation of recycled fine aggregate recycling. As a result of experimenting recycled fine aggregate concrete, the increase in the replacement ratio of recycled aggregates led to the increase in slump and air content. Also, when the replacement ratio of recycled fine aggregates was 30%, it was judged that there was no problem with constructability. When the replacement ratio was 30%, recycled fine aggregate concrete had a similar tendency to natural aggregate concrete at a compressive strength of 24MPa. When the replacement ratio was 30%, at a target strength of 24MPa, recycled fine aggregate concrete had the same physical characteristics as natural aggregate concrete. This means that a replacement ratio of 30% is appropriate for replacement of recycled fine aggregates. In future, there will be a need to improve the quality of recycled fine aggregates for activating the use of recycled fine aggregates and further research will have to evaluate physical properties of recycled fine aggregate concrete using improved recycled fine aggregates.

키워드

참고문헌

  1. Kim, N.H., Yang, S.C. (2012). Evaluation of impurity contentcriteria of recycled aggregate for lean concrete base, Journalof Korean Cociety of Road Engineers, 14(3), 69-76 [in Korean].
  2. Xuan, D., Zhan, B., Poon, C.S. (2015). Assessment of mechanicalproperties of concrete incorporating carbonated recycled concrete aggregates, Cement and Concrete Composites,65, 67-74
  3. Lee, S.H., Shim, J.W. (2010). Enactment provision of recycledaggregate concrete, Korea Concrete Institute ConcreteMagazine, 22(1), 33-35 [in Korean].
  4. Kim, S.B. (2008). Experimental Study on the Estimation of theCompressive Strength and the Influence of Air-contents ofConcrete Using Nondestructive Tests based on Stress Waves, Ph.D Thesis, Hanyang University, 31-32 [in Korean].
  5. Lee, W.K. (1999). Influence of Treatment Method of Recycled Aggregate on the Properties of Concrete. Master's Thesis, Keimyung University [in Korean].
  6. Sim, J.S. (2005). Fundamental performance evaluation of recycled aggregate concrete with varying amount of fly ash and recycled fine aggregate, Journal of the Korea Concrete Institute, 17(5), 796-797 [in Korean].