한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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스마트 시티 구현을 위한 요소기술로써 균열 자기치유 캡슐 활용 프리캐스트 콘크리트의 품질특성 평가에 관한 실험적 연구

Experimental Study on the Quality Properties of Precast Concrete Utilizing Self-Healing Capsules as an Essential Technology for Smart City Implementation

  • 오성록 ((주)뉴저스트 기술연구소) ;
  • 남은준 (고려대학교 미래건설환경융합연구소) ;
  • 양능원 (세명대학교 토목공학과) ;
  • 최연왕 (세명대학교 토목공학과)
  • 투고 : 2023.12.06
  • 심사 : 2023.12.15
  • 발행 : 2023.12.30
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초록

본 논문은 스마트 시티 구축을 위한 핵심 기술로서 자기치유 기술을 적용한 프리캐스트 콘크리트의 품질 특성과 치유 성능을 평가하는 것을 목표로 하였다. 연구 결과는 하이브리드 캡슐을 혼합한 프리캐스트 콘크리트가 슬럼프와 공기량에서 감소하는 경향을 보이며, 이는 품질 특성에 일정한 영향을 미치는 것으로 나타났다. 특히, 슬럼프는 최대 14 %, 공기량은 최대 9 % 감소하였다. 또한, 하이브리드 캡슐을 혼합한 콘크리트는 압축강도와 휨강도에서 각각 최대 16 %와 18 % 감소하는 결과를 보였다. 그러나 하이브리드 캡슐을 혼합함으로써 균열 치유 성능이 증진되는 결과를 얻었다. 정수위 투수 시험을 통한 평가에서, 치유기간 28일 후 0.3 mm 균열 폭의 치유율은 혼합률이 증가함에 따라 향상되었으며, 하이브리드 캡슐의 혼합률 1 %, 3 %, 5 %에서 각각 약 16 %, 25 %, 32 %의 치유율 향상이 확인되었다.

This paper aims to evaluate the quality characteristics and healing performance of precast concrete incorporating self-healing technology as a key technique for the construction of smart cities. The study found that precast concrete mixed with hybrid capsules exhibited a tendency of reduced slump and air content, impacting the quality characteristics. Specifically, the slump decreased by up to 14 %, and the air content by up to 9 %. Moreover, the inclusion of hybrid capsules in the concrete resulted in a maximum decrease of 16 % in compressive strength and 18 % in flexural strength. However, the introduction of hybrid capsules significantly enhanced the crack healing performance. The assessment through water permeability tests showed that the healing rate of 0.3 mm crack width after a 28-day healing period improved as the mixing ratio increased, with the healing rates at 1 %, 3 %, and 5 % hybrid capsule mixtures observed to increase by approximately 16 %, 25 %, and 32 %, respectively.

키워드

과제정보

본 연구는 국토교통부 국토교통 DNA플러스 융합기술대학원 육성사업의 연구비 지원(과제번호 RS-2023-00250434)에 의해 수행되었습니다.

참고문헌

  1. An, E.J., Shin, M.S. (2014). Healing mechanisms and assessment techniques of self-healing concrete, Proceedings of Korea Concrete Institute, 26(2), 477-479 [In Korean].
  2. Choi, W.J. (2001). An Experimental Study on Structural Properties of the Splice Sleeve for the P.C Members, Master's Thesis, Myongji University [in Korean].
  3. Choi, Y.W., Kim, C.G., Nam, E.J., Oh, S.R. (2022). An experimental study on the healing performance of complex capsules using multiphase inorganic materials for crack self-healing of cement mortars, Materials, 15(24), 8819.
  4. Han, J.H. (2005). An Experimental Study on Dry-Connections for Precast Concrete Walls, Master's Thesis, Seoul National University [in Korean].
  5. Kang, D.M., Park, Y.G., Lee, H.J., Moon, D.Y. (2017). Experimental studies on bond and splice performance of splice sleeve for connecting rebar, Journal of the Korean Society for Railway, 20(2), 257-264 [In Korean]. https://doi.org/10.7782/JKSR.2017.20.2.257
  6. Kim, C.G. (2021). A Study on the Development of Sectional Repair System Utilizing Crack Self-Healing Microcapsules, Ph.D Thesis, Semyung University [In Korean].
  7. Kim, C.G., Choi, Y.W., Choi, S., Oh, S.R. (2022). A study on the healing performance of mortar with microcapsules using silicate-based inorganic materials, Materials, 15(24), 8907.
  8. Kim, S.G. (2018). Structural Performance of Horizontal Joint of Precast Concrete Structural Wall, Master's Thesis, Korea National University of Transportation [In Korean].
  9. Lee, K.M., Kim, H.S., Min, K.S., Choi, S. (2020). Evaluation method of self-healing performance of cement composites, Journal of the Korean Recycled Construction Resources Institute, 8(1), 134-142 [In Korean].
  10. Lee, W.J., Kim, H.S., Choi, S., Park, B.S., Lee, K.M. (2021). Evaluation method of healing performance of self-healing materials based on equivalent crack width, Journal of the Korean Recycled Construction Resources Institute, 9(3), 383-388 [In Korean].
  11. Nam, E.J. (2020). A Study on the Self-Healing Properties of Cement Composites Using Solid Capsules with Crystal Growth Type Inorganic Materials, Master's Thesis, Semyung University [In Korean].
  12. Oh, S.R. (2017). A Study on the Development and Properties of Cementitious Composite Materials Utilizing Capsules for Crack Self-Healing, Ph.D Thesis, Semyung University [in Korean].
  13. Oh, S.R., Choi, Y.W., Kim, Y.J. (2019). Effect of cement powder based self-healing solid capsule on the quality of mortar, Construction and Building Materials, 214, 574-580. https://doi.org/10.1016/j.conbuildmat.2019.04.123
  14. Oh, Y.H., Moon, J.H., Lee, G.C. (2020). Structural behavior of the connections in PC double-walls as a lateral force resisting system, Journal of the Architectural Institute of Korea, 36(6), 201-210 [In Korean]. https://doi.org/10.5659/JAIK.2020.36.6.201
  15. Park, B.H. (2017). Construction Period and Cost Analysis of Composite Method Using Hollow-PC Column, Master's Thesis, Korea National University of Transportation [In Korean].
  16. Park, J.H. (2021). A Study on the Crack Self-Healing Properties of Cement Mortar Using Hybrid Capsules, Master's Thesis, Semyung University [In Korean].
  17. Schlangen, E., Sangadji, S. (2013). Addressing infrastructure durability and sustainability by self healing mechanisms-Recent advances in self healing concrete and asphalt, Procedia Engineering, 54, 39-57. https://doi.org/10.1016/j.proeng.2013.03.005