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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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The Effect of Blaine and SO3 Contents of OPC on Shotcrete Binder with Calcium Aluminate Accelerator

OPC의 분말도 및 SO3 함량이 시멘트 광물계 급결제를 사용한 숏크리트 결합재 물성에 미치는 영향

  • Received : 2020.02.28
  • Accepted : 2020.03.30
  • Published : 2020.04.30
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Abstract

Shotcrete concrete is generally used in the form of ready-mixed concrete products using type I ordinary portland cement(hereinafter referred to as OPC) and about 5% of accelerator mixed separately in the field. In this study, we tested the effect of OPC fineness and SO3 content on a penetration resistance, compressive strength of binder for shotcrete using calcium aluminate type accerlerator. And we analysed hydrates and pore structure effects on mortar performance. In the future, it is expected to be useful for manufacturing optimized OPC as a binder for shotcrete.

숏크리트용 콘크리트는 일반적으로 1종 보통 포틀랜드시멘트(이하 OPC)를 100% 사용한 레미콘 제품에 현장에서 별도로 숏크리트용 급결제를 약 5% 혼합하는 방식으로 사용된다. 본 연구에서는 국내에서 사용률이 높은 시멘트 광물계 급결제(calcium aluminate)를 사용한 숏크리트용 결합재로서 OPC의 분말도 및 SO3 함량이 모르타르 관입저항 및 압축강도, 페이스트 수화물 및 공극구조에 미치는 영향을 시험 및 분석하여 재령별 수화물의 생성량과 공극구조가 숏크리트의 모르타르 성능에 미치는 영향을 파악하였다. 향후 숏크리트용 결합재로서 최적화된 OPC를 제조하는데 활용할 수 있을 것으로 기대된다.

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References

  1. Nakagawa. A., Hirana, K. (1982) Accelerators, Cement and Concrete, 427, 95-100.
  2. Paglia, C., Wombacher, F., Bohni, H., (2001) The influence of alkali-free and alkaline shotcrete accelerators within cement systems: I. Characterization of the setting behavior, Cement and Concrete Research, 31(6), 913-918.
  3. Belie, N., Grosse, C. U., Kurz, J., Reinhardt, H.W., (2005) Ultrasound monitoring of the influence of different accelerating admixtures and cement types for shotcrete on setting and hardening behaviour, Cement and Concrete Research, 35(11), 2087-2094. https://doi.org/10.1016/j.cemconres.2005.03.011
  4. Kim. S. M., Shin. J. Y., Ma, S. J., Nam, G. W., Kim. K. H., (2008) An experimental study on performance of concrete with constituent materials of shotcrete, J. of Korean Tunn. Undergr. Sp. Assoc., 10(1), 59-68 (In Korean).
  5. Lea, F. M., (1971), The chemistry of Cement and Concrete, 3rd Ed., Chemical Publishing Co.
  6. Ghosh, S. N., (1991), Cement and Concrete Science & Technology, 1, 1. Thomas Telford.
  7. Robson, J. D., (1952) Characteristics and applications of mixtures of portland cement and high-alumina cements, Chemistry and Industry, 1, 2-7.
  8. Kurdowski, W., (2014), Cement and Concrete Chemistry, Springer Science & Business.
  9. Kirca, O., (2006) Temperature effect on calcium aluminate cement based composite binders, Ankara:Middle East Technical University.
  10. Saout, G., Lothenbach, B., Hori, A., (2012) Hydration mechanism of quick hardening cement based on OPC blended with an amorphous calcium aluminate. 18th Internationale Baustofftagung (IBAUSIL) Weimar, 474-481.
  11. Mindess, S., Young, J. F., Darwin, D., (2003) Concrete 2nd Ed., Technical Documents.
  12. Kim, J. Y., Yum, S. K., Yoo, D. W., Choi, H. K., (2010) A Study on Properties of High Blaine Slag Cement for Shotcrete, Journal of the Korean Ceramic Society, 47(5), 357-364 (In Korean). https://doi.org/10.4191/KCERS.2010.47.5.357
  13. Kim, H. W., Moon, H., Kim, J. H., Chung, C. W., (2014) Influences of Slag Replacement on the Properties of Shotcrete Using a Slurry-Type Set Accelerator, Journal of Korea Institute of Building Construction, 14(5), 389-396 (In Korean). https://doi.org/10.5345/JKIBC.2014.14.5.389
  14. Watanabe, Y., (1995) Cement admixture and cement composition (making use of the same), Korean Patent 1995-0007707.
  15. You, S. H., Shin, K. J., Kim, Y. Y., (2012) Influence of Blast Furnace Slag and Anhydrite on Strength of Shotcrete, Journal of the Korea Concrete Institute, 24(1), 87-95 (In Korean). https://doi.org/10.4334/JKCI.2012.24.1.087

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