Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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A Study on Crack Healing Properties of Cement Composites Mixed with Self-healing Microcapsules

자기치유 마이크로 캡슐을 혼합한 시멘트 복합재료의 품질 및 균열 치유 특성에 관한 실험적 연구

  • Received : 2018.09.18
  • Accepted : 2018.12.31
  • Published : 2019.01.01
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Abstract

In this study, self - healing microcapsules which can be mixed directly with cement composites were prepared, and the quality and crack healing performance of cement composites with self - healing microcapsules were evaluated. In the past, it has been focused on evaluating self-healing capsules and crack healing properties. Therefore, self - healing microcapsules have been studied for their effect on the quality of cement composites when mixed with cement composites. The table flow and the air flow rate of the cement composite material mixed with self-healing microcapsules were found to have no significant influence on table flow and air volume regardless of mixing ratio. Compressive strength and splitting tensile strength tended to decrease with increasing capsule mixing ratio. As a result of evaluation of crack healing properties according to water flow, initial water permeability decreased, and reaction products were generated over time and cracks were healed.

본 연구에서는 시멘트 복합재료와 직접 혼합 가능한 자기치유 마이크로 캡슐을 제조하였으며, 자기치유 마이크로 캡슐이 혼합된 시멘트 복합재료의 품질 및 균열 치유 성능 특성을 평가하였다. 종래의 경우 자기치유 캡슐 제조와 균열 치유 특성 평가에만 치중되어 평가되어 왔다. 따라서 자기치유 마이크로 캡슐은 시멘트 복합재료와 혼합시 시멘트 복합재료의 품질에 미치는 영향이 있기 때문에 이에 대한 검토를 수행하였다. 자기치유 마이크로 캡슐을 혼합한 시멘트 복합재료의 테이블 플로우 및 공기량 평가 결과 혼합율에 관계없이 테이블 플로우 및 공기량은 큰 영향이 없는 것으로 나타났다. 압축강도 및 쪼갬인장강도는 캡슐 혼합율이 증가할수록 강도가 감소하는 경향이 나타났다. Water Flow에 따른 균열 치유 특성 평가 결과 초기 투수량이 감소하는 결과가 나타났으며, 시간 경과에 따라 반응 생성물 발생하여 균열이 치유되는 것을 확인 할 수 있었다.

Keywords

References

  1. An, E., J. and 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. B.J. Blaiszika, N.R. Sottos and S.R. White, (2007). Nanocapsules for self-healing materials, Journal of Composites Science and Technology, 68(3), 978-986.
  3. Choi, Y. W.. Oh, S. R., Kim, C. G. and 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
  4. Erik Schlangen and Senot Sangadji, (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.
  5. Tatyana Nesterova, Kim Dam-Johansena, Lars Thorslund Pedersen and Soren Kiil, (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
  6. Kim, C. G., (2017). A Study on the Crack Self Healing Properties of Cement Mortar Utilizing Micro Capsules with Liquid-type Inorganic materials, Master Thesis, Semyung University (in Korean).
  7. Kim, P. S., Jo, C. K., Ju, T. H., Choi, Y. C., and 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).
  8. M. Hunger, A.G. Entrop, I. Mandilaras, H.J.H. Brouwers and M. Founti, (2009). The Behavior of Self-Compacting Concrete Containing Micro-Encapsulated Phase Change Materials, Journal of Cement & Concrete Composites, 31(10), 731-743. https://doi.org/10.1016/j.cemconcomp.2009.08.002
  9. 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).
  10. Shazim Ali Memon, H.Z. Cui, Hang Zhang and Feng Xing, (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.
  11. Song, Y. K., Jo, Y. H., Lim, Y. J., Cho, S. Y., Yu, H. C., Ryu, B. C., Lee, S. I., and 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
  12. Xianfeng Wang, Feng Xing, Ming Zhang, Ningxu Han and Zhiwei Qian, (2003). Experimental Study on Cementitious Composites Embedded with Organic Microcapsules, Journal of Materials, 6(9), 4064-4081.