Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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An Experimental Study on the Mechanical Healing Properties of Self-Healing Mortar with Solid Capsules Using Crystal Growth Type Inorganic Materials

결정성장형 무기재료 활용 고상 캡슐을 혼합한 자기치유 모르타르의 역학적 치유 특성에 관한 실험적 연구

  • Choi, Yun-Wang (Department of Civil Engineering, Semyung University) ;
  • Nam, Eun-Joon (Department of Civil Engineering, Semyung University) ;
  • Oh, Sung-Rok (Institute of Technology, Newjust Co., Ltd) ;
  • Lee, Kwang-Myong (Department of Civil and Environmental Engineering, Sungkyunkwan University)
  • 최연왕 (세명대학교 토목공학과) ;
  • 남은준 (세명대학교 토목공학과) ;
  • 오성록 ((주)뉴저스트 기술연구소) ;
  • 이광명 (성균관대학교 토목환경공학과)
  • Received : 2020.11.20
  • Accepted : 2020.12.06
  • Published : 2020.12.30
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Abstract

In this paper, a solid capsule was prepared using a crystal growth type inorganic material capable of hydration reaction, the quality and mechanical healing properties of self-healing mortar with solid capsules were evaluated. Solid capsules were mixed 5% by mass of cement. Reloading test results of compressive load, it was found to improve about 20% on average for the natural healing effect of Plain, in the case of the elastic range, the healing rate was about 79% at the 7 days of healing age and 98% at the 28 days of healing age. Reload test results of flexural load, in the case of the elastic range, the healing rate was about 79% at the 7 days of healing age and 98% at the 28 days of healing age. Through these results, it is judged that the healing performance of solid capsules has also an effect on mechanical healing properties such as strength in addition to the durability properties obtained by the permeability test. Since the strength tends to decrease as the solid capsules are mixed, it is considered necessary to compensate.

본 논문에서는 수화반응이 가능한 결정성장형 무기재료를 사용하여 고상 캡슐을 제조하였으며, 고상 캡슐 혼합에 따른 자기치유 모르타르의 품질 및 역학적 치유 특성을 평가하였다. 고상 캡슐은 시멘트 질량에 대하여 5% 혼합하였다. 압축하중 재부하 실험결과 Plain의 자연 치유 효과에 대하여 평균적으로 약 20% 수준을 향상시키는 것으로 나타났으며, 탄성범위의 경우 치유재령 7일에 약 79% 및 치유재령 28일에 98%의 치유율이 나타났다. 휨하중 재부하 실험결과, 탄성범위의 경우 치유재령 7일에 약 79% 및 치유재령 28일에 98%의 치유율이 나타났다. 이러한 결과를 통하여, 고상 캡슐의 치유성능은 투수시험에 의한 내구적 특성 외에도 강도와 같은 역학적 치유 특성에도 영향이 있는 것으로 판단되며, 고상 캡슐의 혼합에 따라 강도가 감소하는 경향이 있으므로 이에 대한 보완이 필요하다고 판단된다.

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References

  1. An, E.J., Shin, M.S. (2014). Healing mechanisms and assessment techniques of self-healing concrete, Proceeding of Korea Concrete Institute, 26(2), 477-479 [in Korean].
  2. Blaiszika, B.J., Sottos, N.R., White, S.R. (2007). Nanocapsules for self-healing materials, Journal of Composites Science and Technology, 68(3), 978-986.
  3. Choi, S.W., Bae, W.H., Lee, K.M., Shin, K.J. (2017). Correlation between crack width and water flow of cracked mortar specimens measured by constant water head permeability test, Journal of the Korea Concrete Institute, 29(3), 264-273.
  4. Choi, Y.W., Oh, S.R., Choi, B.K. (2017). A study on the manufacturing properties of crack self-healing capsules using cement powder for addition to cement composites, Journal of Advances in Materials Science and Engineering, 1-8.
  5. Choi, Y.W.. Oh, S.R., Kim, C.G. Im, H.S. (2018). Preparation characteristics of self-healing microcapsules for mixing cement composites utilizing liquid inorganic materials, 6(4), 236-243 [in Korean]. https://doi.org/10.14190/JRCR.2018.6.4.236
  6. Feiteira, J., Gruyaert, E., De Belie, N. (2016). Self-healing of moving cracks in concrete by means of encapsulated polymer precursors, Journal of Construction and Building Materials, 102, 671-678. https://doi.org/10.1016/j.conbuildmat.2015.10.192
  7. Huang, Y., Guan, Y., Wang, L., Zhou, J., Ge, Z., Hou, Y. (2018). Characterization of mortar fracture based on three point bending test and XFEM, International Journal of Pavement Research and Technology, 11, 339-344. https://doi.org/10.1016/j.ijprt.2017.09.005
  8. Hunger, M., Entrop, A.G., Mandilaras, I., Brouwers, H.J.H., Founti, M. (2009). The behavior of self-compacting concrete containing micro-encapsulated phase change materials, Journal of Cement and Concrete Composites, 31(10), 731-743. https://doi.org/10.1016/j.cemconcomp.2009.08.002
  9. Kim, C.G. (2017). A Study on the Crack Self Healing Properties of Cement Mortar Utilizing Micro Capsules with Liquid-type Inorganic materials, Master's Thesis, Semyung University [in Korean].
  10. Kim, P.S., Jo, C.K., Ju, T.H., Choi, Y.C., Lee, J.K. (2003). Preparation and thermal characteristics of microencapsulated PCM for none supercooling phenomenon, Proceeding of The Korean Society for Energy, 225-228 [in Korean].
  11. Li, W., Jiang, Z., Yang, Z. (2017). Acoustic characterization of damage and healing of microencapsulation-based self-healing cement matrices, Journal of Cement and Concrete Composites, 84, 48-61. https://doi.org/10.1016/j.cemconcomp.2017.08.013
  12. Memon, S.A., Cui, H.Z., Zhang, H., Xing, F. (2014). Utilization of macro encapsulated phase change materials for the development of thermal energy storage and structural lightweight aggregate concrete, Journal of Applied Energy, 139, 43-55. https://doi.org/10.1016/j.apenergy.2014.11.022
  13. 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].
  14. Nesterova, T., Johansena, K.D., Pedersen, L.T., Kiil, S. (2012). Microcapsule-based self-healing anticorrosive coatings: capsule size, coating formulation, and exposure testing, Journal of Organic Coatings, 75(4), 309-318. https://doi.org/10.1016/j.porgcoat.2012.08.002
  15. 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].
  16. Oh, S.R., Choi, Y.W., Kim, Y.J. (2019). Effect of cement powder based self-healing solid capsule on the quality of mortar, Journal of Construction and Building Materials, 214, 574-580. https://doi.org/10.1016/j.conbuildmat.2019.04.123
  17. Oh, S.R., Kim, C.G., Nam, E.J., Choi, Y.W. (2020). An experimental study on the quality and crack healing properties of self-healing mortar containing solid capsules using crystal growth type inorganic materials, Journal of Korean Recycled Construction Resources Institute, 8(1), 120-128. https://doi.org/10.14190/JRCR.2020.8.1.120
  18. Qureshi, T., Kanellopoulos, A., Al-Tabbaa, A. (2018). Autogenous self-healing of cement with expansive minerals-I: impact in early age crack healing, Journal of Construction and Building Materials, 192, 768-784. https://doi.org/10.1016/j.conbuildmat.2018.10.143
  19. Reinhardt, H.W., Jooss, M. (2003). Permeability and self-healing of cracked concrete as a function of temperature and crack width, Journal of Cement and Concrete Research, 33(7), 981-985. https://doi.org/10.1016/S0008-8846(02)01099-2
  20. Schlangen, E., Sangadji, S. (2013). Addressing infrastructure durability and sustainability by self healing mechanisms - recent advances in self healing concrete and asphalt, Journal of Procedia Engineering, The 2nd International Conference, 54, 39-57.
  21. Song, Y.K., Jo, Y.H., Lim, Y.J., Cho, S.Y., Yu, H.C., Ryu, B.C., Lee, S.I., Chung, C.M. (2013) Sunlight-induced self-healing of a microcapsule-type protective coating, Journal of ACS Applied Materials and Interfaces, 5(4), 1378-1384. https://doi.org/10.1021/am302728m
  22. Wang, X., Xing, F., Zhang, M., Han, N., Qian, Z. (2003). Experimental study on cementitious composites embedded with organic microcapsules, Journal of Materials, 6(9), 4064-4081.