Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

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

DOI QR Code

Compressive Strength and Healing Performance of Mortar Using Self-healing Inorganic Materials

자기치유형 무기계 혼합재를 사용한 모르타르의 압축강도 및 치유성능

  • Hyung-Suk, Kim (Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University) ;
  • Woong-Jong, Lee (Research Center, Korea Concrete Institute) ;
  • Sung, Choi (Self-healing green concrete research center, Sungkyunkwan University) ;
  • Kwang-Myong, Lee (Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University)
  • 김형석 (성균관대학교 건설환경시스템공학과) ;
  • 이웅종 (한국콘크리트학회 공학연구소) ;
  • 최성 (성균관대학교 자기치유 친환경 콘크리트 연구센터) ;
  • 이광명 (성균관대학교 건설환경시스템공학과)
  • Received : 2022.11.18
  • Accepted : 2022.12.15
  • Published : 2022.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, the characteristics of self-healing mortars produced using an inorganic self-healing material consisting of ground granulated blast furnace slag, expansion agent, and anhydrite, were investigated. For three types of self-healing mortars with different amounts of the inorganic healing material, compressive strength was measured and the self-healing performance was evaluated through the constant water head permeability test. The healing rate and equivalent crack width according to crack-induced aging were used as indicies of healing performance evaluation. Considering the development of compressive strength of the self-healing mortars, the change in the healing rate with healing periods, and the economic feasibility, the optimal amount of inorganic self-healing materials was suggested as 20 % of the mass of cement.

본 연구에서는 고로슬래그 미분말, 팽창재 및 무수석고로 이루어진 무기계 자기치유 소재를 사용하여 제조한 자기치유 모르타르의 특성을 조사하였다. 무기계 치유재료의 사용량이 다른 3종류의 자기치유 모르타르를 대상으로 압축강도를 측정하고 정수위 투수시험를 통하여 치유성능을 평가하였다. 치유성능 평가지표로 균열유도재령애 따른 치유율과 등가균열폭을 활용하였다. 자기치유 모르타르의 압축강도 발현, 치유재령에 따른 치유율 변화와 경제성을 고려하여 무기계 혼합재의 최적 사용량을 시멘트 질량 대비 20 %로 제안하였다.

Keywords

Acknowledgement

본 연구는 국토교통부 건설기술연구사업의 연구비지원(22SCIP-C160254-03)에 의해 수행되었습니다.

References

  1. Ahn, T.H., Kishi, T. (2010). Crack self-healing behavior of cementitious composites incorporating various mineral admixtures, Journal of Advanced Concrete Technology, 8(2), 171-186. https://doi.org/10.3151/jact.8.171
  2. Architectural Institute of Japan. (1996). Recommendation for practice of concrete make use of ground granulation blast furnace slag, Architectural Institute of Japan, 25-52.
  3. Choi, Y.W., Nam, E.J., Kim, C.G., Oh, S.R. (2020). The crack healing properties of cement mortar materials using crystal growth type self-healing solid capsules according to the crack induction age, Journal of the Korean Recycled Construction Resources Institute, 8(4), 475-482 [in Korean].
  4. Choi, Y.W., Nam, E.J., Kim, C.G., Oh, S.R. (2022). An experimental study on crack self-healing and mechanical recovery performance of cement composites materials using encapsulated expandable inorganic materials based solid healing materials, Journal of the Korean Recycled Construction Resources Institute, 10(1), 92-100 [in Korean].
  5. Huang, H., Ye, G., Damidot, D. (2014). Effect of blast furnace slag on self-healing of microcracks in cementitious materials, Cement and Concrete Research, 60, 68-82. https://doi.org/10.1016/j.cemconres.2014.03.010
  6. Jaroenratanapirom, D., Sahamitmongkol, R. (2010). Effects of different mineral additives and cracking ages on self-healing performance of mortar, Proceedings of the 6th Annual Concrete Conference, 551-556.
  7. Korea Concrete Institute (2021). Constant water head permeability test method for the evaluation of self-healing performance of mortar, KCI-CT114 [In Korean].
  8. Lee, K.M., Kim, H.S., Lee, D.K., Shin, K.J. (2021a). Self-healing performance evaluation of concrete incorporating inorganic materials based on a water permeability test, Materials, 14(12), 1-17.
  9. Lee, W.J., Kim, H.S., Choi, S., Park, B.S., Lee, K.M. (2021b). 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].
  10. Moon, G.D., Kim, J.H., Cho, Y.K., Choi, Y.C. (2014). Effect of anhydrite on the mechanical and durability properties of high volume slag concrete, Journal of the Korean Recycled Construction Resources Institute, 2(3), 239-246 [in Korean]. https://doi.org/10.14190/JRCR.2014.2.3.239
  11. Park, B.S., Choi, S.C., Hong, G.T., Kwon, H. (2020). Technology and practical application of self-healing concrete incorporating organic/inorganic materials, Magazine of Korea Concrete institute, 32(5), 10-14 [In Korean].
  12. Van Tittelboom, K., De Belie, N. (2013). Self-healing in cementitious materials - A review, Materials, 6(6), 2182-2217. https://doi.org/10.3390/ma6062182