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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Material Characteristics of Rapid Hardening Cement Paste Using Phase Change Material for Semi-rigid Pavement

상변화물질을 사용한 반강성 포장용 초속경시멘트 페이스트 재료의 성능평가

  • 김성수 (충남대학교 토목공학과) ;
  • 이병재 ((주)제이엔티아이엔씨 기술연구소) ;
  • 방진욱 (충남대학교 토목공학과) ;
  • 김윤용 (충남대학교 토목공학과)
  • Received : 2016.02.15
  • Accepted : 2016.03.09
  • Published : 2016.07.01
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Abstract

A study to apply phase change material(PCM) to rapid hardening cement paste forming semi-rigid pavement was carried out. The characteristics fresh and hardened paste were evaluated through the experiment for a total of 6 mixtures according to the cement type and the substitution of phase change material for acrylate. The fluidity by substituting phase change material for acrylate satisfied the target flow time of 10 to 13 seconds. In case of setting time, it was possible to secure the performance of rapid hardening cement by substituting phase change material, and if the substitution ratio over 60%, the initial set occurred 1 to 2 minutes faster than other mixtures. In case of compressive strength and bond strength, it showed similar strength characteristics with the plain mixture, and it satisfied both the target compressive and bonding strength of 36MPa and 2MPa. The mixture substituting phase change material showed higher resistance to chloride ion penetration than the mixture only using acrylate and the OPC level was insufficient. From the results of physical and mechanical performances of semi-rigid pavement cement paste, the phase change material substitution rate of 20% was effective in the range of this study.

본 연구에서는 상변화물질(PCM)을 반강성 포장체를 구성하는 초속경시멘트 페이스트 주입재에 적용하기 위한 연구를 수행하였다. 반강성포장용 주입재의 아크릴레이트를 PCM으로 치환에 따른 총 6종류의 주입재 배합에 대하여 경화 전 후 특성을 실험을 통해 평가하였다. 아크릴레이트를 PCM으로 치환하여 유동성을 평가한 결과 본 연구에서 목표로한 유하시간 10~13초를 모두 만족시킬 수 있는 것으로 나타났다. 응결시간의 경우 PCM으로 치환하더라도 초속경 시멘트의 성능을 확보할 수 있는 것으로 나타났고, PCM 치환 60%이상의 경우 초결시간이 다른 배합에 비해 1~2분 빨리 발생되었다. 압축강도 및 부착강도의 경우 Plain 배합과 유사한 강도특성을 나타내었고, 본 연구에서 목표로 하는 압축강도 36MPa, 부착강도 2MPa를 모두 만족시켰다. PCM으로 치환한 배합은 아크릴레이트만을 사용한 배합에 비해 우수한 염소이온침투저항성을 나타내었으나, OPC수준에는 미흡하였다. 반강성포장용 주입재에 대한 물리 역학적 성능평가 결과, 이 연구의 범위내에서는 PCM 대체율 20% 수준이 효과적인 것으로 판단된다.

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References

  1. Lee, B. J., Lee, J., Hyon, J. H., and Kim, Y. Y. (2013), Properties of SPE-Based Cement Grout for Semi-Rigid Pavements, Journal of the Korea Institute for Structural Maintenance and Inspection, 17(4), 57-65. https://doi.org/10.11112/jksmi.2013.17.4.057
  2. Park, K. Y., Lee, J. J., Kwon, S. A., and Jeong, J. H. (2010), Evaluation of Functional and Structural Performance of Semi Rigid Overlay Pavements, Journal of the Korean Society of Civil Engineers, 30(3D), 271-278.
  3. Lee, B. J., Bang, J. W., Hyun, J. H., Kim, Y. Y., Noh, J. H., and Lee, J. (2012), Flowing and Strength Properties of Cement Concrete Grouts for Bridge Deck Pavements using Sulfur Polymer Emulsion, Proceedings of the Korea Concrete Institute, 24(2), 261-262.
  4. Park, T. S. (2008), Evaluation of the Performance and Moisture Retaining Ability in Semi-Rigid Pavement, Korean Society of Road Engineers, 10(1), 69-79.
  5. Baek, S. H. (2010), Fracture Toughness of Semi-Rigid Asphalt Concrete, Kangwon national university graduate school, 42-45.
  6. Khil, B. S., Yun, H. D., and Jeong, O. R. (2011), Field Application of Low Heat Concrete Using Strontium Hydroxide Based Latent Heat Material, Journal of the Korea Institute for Structural Maintenance and Inspection, 15(5), 218-226. https://doi.org/10.11112/jksmi.2011.15.5.218
  7. Kim, Y. R., Kim, D. S., Khil, B. S., Kim, O. J., and Lee, D. B. (2009), Experimental Study on the Generation of Hydration Heat of Binder using Latent Heat Material, Journal of The Korean Institute of Building Construction, 9(3), 103-107.
  8. Kim, H. I., Jin, X. Z., Choi, H. W., and Park, S. M. (2007), Preparation of Polyurea Microcapsules Containing Phase Change Material and their Application on Fiber Composites, The Korean Society Of Dyers And Finishers, 19(1), 37-44.
  9. Lee, B. J., Jang, Y. I., Bae, J. Y., Bang, J. W., Kim, Y. Y., and Kim, J. H. (2012), Experimental Study on the Strength Properties of Porous Concrete Using Surface Coated Recycled Aggregate, Proceedings of the Korea Concrete Institute, 24(2), 727-728.
  10. NT-Build 492 (1999), Concrte, Mortar and Cement-Based Repair Materials : Chloride Migration Coefficient from Non-Steady-State Migration Experiments, Nordtest, Finland.
  11. ASTM C 939:10 (2010), Standard Test Method for Flow of Grout for Preplaced-Aggregate Concrete (Flow Cone Method), American Society of Testing Materials.