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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
권호 표지
DOI QR코드

DOI QR Code

An Experimental Study on the Quality and Crack Healing Characteristics of Repair Mortar Containing Self-Healing Solid Capsules of Crystal Growth Type

결정성장형 자기치유 고상캡슐을 혼합한 보수 모르타르의 품질 및 균열 치유 특성에 관한 실험적 연구

  • Received : 2019.12.01
  • Accepted : 2020.01.21
  • Published : 2020.02.29
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, self - healing solid capsules of crystal growth type which can be mixed directly with repair mortar were prepared, and the quality and crack healing performance of repair mortar with self - healing solid capsules were evaluated. The table flow and the air flow rate of the repair mortar material mixed with self-healing solid capsules were found to have no significant influence on table flow and air volume regardless of mixing ratio. Compressive strength tended to decrease with increasing capsule mixing ratio. As a result of evaluation of crack healing properties according to constant water head permeability test, initial water permeability decreased, and reaction products were generated over time and cracks were healed.

본 연구에서는 보수 모르타르와 직접 혼합 가능한 결정성장형 자기치유 고상캡슐을 제조하였으며, 자기치유 고상캡슐이 혼합된 보수 모르타르의 품질 및 균열 치유 성능 특성을 평가하였다. 자기치유 고상캡슐을 혼합한 보수 모르타르의 테이블 플로우 및 공기량 평가 결과 혼합율에 관계없이 테이블 플로우 및 공기량은 큰 영향이 없는 것으로 나타났다. 압축강도는 캡슐 혼합율이 증가할수록 강도가 감소하는 경향이 나타났다. 정수위 투수시험에 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, 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., 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
  5. 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.
  6. 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
  7. 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).
  8. 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).
  9. 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
  10. 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).
  11. 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
  12. Reinhardt, H. W., and 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
  13. 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.
  14. 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
  15. 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.
  16. 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.