Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

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

DOI QR Code

Self-healing Performance Evaluation of Cement Mortar with Inorganic Additives Based on Clinker Binder

클링커 바인더 기반 무기계 혼합재를 활용한 시멘트 모르타르의 치유성능 평가

  • Jung-Il, Suh (Construction Technology Center, Korea Conformity Laboratories) ;
  • Yoon-Suk, Choi (Construction Technology Center, Korea Conformity Laboratories) ;
  • Byung-Sun, Park (Department of Environmental Systems Engineering, Korea University) ;
  • Kwang-Myong, Lee (Departement of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University)
  • 서정일 ((재)한국건설생활환경시험연구원 건설기술연구센터) ;
  • 최윤석 ((재)한국건설생활환경시험연구원 건설기술연구센터) ;
  • 박병선 (고려대학교 환경시스템공학과) ;
  • 이광명 (성균관대학교 건설환경시스템공학과)
  • Received : 2022.11.17
  • Accepted : 2022.12.14
  • Published : 2022.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, the mechanical properties and self-healing performance of cement mortar containing clinker binder, calcium sulfoaluminate(CSA), and sodium sulfate(Na2SO4) were evaluated. The mechanical properties of cement mortar were investigated by measuring compressive strength and flexural strength, and the healing performance was evaluated through hydrostatic water permeability test and gas diffusion test. In addition, the healing products precipitated in the cracks were visually observed through an optical microscope and a scanning electron microscope(SEM). As a result, the incorporation of the clinker binder-based inorganic additives improved the initial and 28-day strength by about 20 %. Depending on the healing performance evaluation method, there was a difference in the healing rate, and the healing rate showed a tendency to be underestimated. Nevertheless, CaCO3 was precipitated as the main healing product inside the 0.3 mm crack when the inorganic additives were mixed with cement mortar, improving the self-healing performance.

본 연구에서는 무기계 재료인 클링커 바인더, Calcium sulfoaluminate(CSA), 그리고 sodium sulfate(Na2SO4)가 포함된 시멘트 모르타르의 물리적 특성 및 자기치유성능을 평가하였다. 압축강도 및 휨강도 측정을 통해 시멘트 모르타르의 물리적 강도를 알아보고, 정수위 투수시험 및 기체확산시험을 통해 치유성능을 평가하였다. 또한 광학현미경과 주사전자현미경을 통해 균열부 내 침전된 치유생성물을 시각적으로 관찰하였다. 그 결과, 클링커 바인더 기반 무기계 혼합재의 혼입은 시멘트 모르타르의 초기 및 28일 재령 강도를 약 20 % 증진시켰다. 치유성능 평가방법에 따라 치유율의 편차가 존재하고 과소평과 되는 경향을 나타냈으나, 무기계 혼합재의 시멘트 모르타르 혼입 시 0.3 mm 균열 내부에서 CaCO3가 주요 치유생성물로 침전되어 치유성능을 향상시켰다.

Keywords

Acknowledgement

본 연구는 국토교통부/국토교통과학기술원의 지원으로 수행되었음(과제번호 22SCIP-C159064-03).

References

  1. De Belie, N., Gruyaert, E., Al-Tabbaa, A., Antonaci, P., Baera, C., Bajare, D., Darquennes, A., Davies, R., Ferrara, L., Jefferson, T., Litina, C., Miljevic, B., Otlewska, A., Ranogajec, J., Roig-Flores, M., Paine, K., Lukowski, P., Serna, P., Tulliani, J.M., Vucetic, S., Wang, J., Jonker, H.M. (2018). A review of self-healing concrete for damage management of structures, Advanced Materials Interfaces, 5(17), 1800074.
  2. Edvardsen, C. (1999). Water permeability and autogenous healing of cracks in concrete, ACI Materials Journal, 96(4), 448-454.
  3. Eom, K.Y., Lee, S.W. (2021). A study on the policy direction of public-private partnership for the improvement of aged infrastructure, Research Report, Construction & Economy Research Institute of Korea, Korea [in Korean].
  4. He, Y., Zhang, X., Zhang, Y., Song, Q., Liao, X. (2016). Utilization of lauric acid-myristic acid/expanded graphite phase change materials to improve thermal properties of cement mortar, Energy and Buildings, 133, 547-558. https://doi.org/10.1016/j.enbuild.2016.10.016
  5. Korea Concrete Institute (2021). Constant water head permeability test method for the evaluation of self-healing performance of mortar, KCI-CT114, Korea [in Korean].
  6. Lee, D.K., Shin, K.J. (2020). Performance evaluation method of self-healing concrete using gas diffusion experiment, Journal of the Korean Recycled Construction Resources, 8(1), 143-151 [in Korean].
  7. Lee, D.K., Shin, K.J. (2021). Development of oxygen diffusion test method for crack width evaluation of self-healing concrete, Journal of the Korean Recycled Construction Resources, 9(3), 375-382 [in Korean].
  8. 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, 9(3), 383-388 [in Korean].
  9. Mehta, P.K., Monteiro, P.J.M. (2014). Concrete: Microstructure, Properties, and Materials, McGraw-Hill Education, United States.
  10. Park, B., Choi, Y. (2021). Self-healing products of cement pastes with supplementary cementitious materials, calcium sulfoaluminate and crystalline admixtures, Materials, 14(23), 7021.
  11. Shin, J.W., Her, S.W., Bae, S.C. (2020). Investigation on the self-healing performance of cement mortar incoporating inorganic expansive additives, Journal of the Korean Recycled Construction Resources, 8(4), 404-412 [in Korean].
  12. Sisomphon, K., Copuroglu, O., Koenders, E.A.B. (2012). Self-healing of surface cracks in mortars with expansive additive and crystalline additive, Cement and Concrete Composites, 34, 566-574. https://doi.org/10.1016/j.cemconcomp.2012.01.005
  13. Van Mullem, T., Gruyaert, E., Caspeele, R., De Belie, N. (2020). First large scale application with self-healing concrete in Belgium: analysis of the laboratory control tests, Materials, 13(4), 997.
  14. Van Mullem, T., Gruyaert, E., Debbaut, B., Caspeele, R., De Belie, N. (2019). Novel active crack width control technique to reduce the variation on water permeability results for self-healing concrete, Construction and Building Materials, 203, 541-551. https://doi.org/10.1016/j.conbuildmat.2019.01.105
  15. 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
  16. Wang, R., Ren, M., Gao, X., Qin, L. (2018). Preparation and properties of fatty acids based thermal energy storage aggregate concrete, Construction and Building Materials, 165. 1-10. https://doi.org/10.1016/j.conbuildmat.2018.01.034
  17. Yoo, K.S., Jang, S.Y., Lee, K.M. (2021). Recovery of chloride penetration resistance of cement-based composites due to self-healing of cracks, Materials, 14(10), 2501.