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 Addition of Blast-furnace Slag Powder and Limestone powder on Shotcrete Binder with Calcium Aluminate Accelerator

고로슬래그 분말 및 석회석 분말이 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 addition of slag powder(SP) and limestone powder(LSP) 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 composite cement 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 기존 OPC에 슬래그분말(이하 SP), 석회석분말(이하 LSP)를 첨가하여 혼합시멘트를 사용할 때의 응결 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 결합재를 제조하는데 활용할 수 있을 것으로 기대된다.

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References

  1. Lea, F. M., (1971), The chemistry of Cement and Concrete, 3rd Ed., Chemical Publishing Co.
  2. Ghosh, S. N., (1991), Cement and Concrete Science & Technology, 1, 1. Thomas Telford.
  3. Majumbar, A. J., Singh, B., Edmonds, R. N., (1989) Hydration of mixtures of C12A7 and granulated blastfurnace slag, Cement and Concrete Research, 19(6), 848-856. https://doi.org/10.1016/0008-8846(89)90097-5
  4. Gosselin, C., (2009), Microstructural development of calcium aluminate cement based systems with and without supplementary cementitious materials (No. THESIS), EPFL.
  5. 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
  6. Lee, S. T., Kim, S. S., Kim, D. G., Park, K. P., (2013), Effect of Types of Accelerators and Replacement Levels of GGBFS on the Performance of Shotcrete Mortars, Journal of the Korea institute for structural maintenance and inspection, 17(1), 76-84. https://doi.org/10.11112/jksmi.2013.17.1.076
  7. Gutteridge, W. A., Dalziel, J. A., (1990), Filler cement: the effect of the secondary component on the hydration of Portland cement: part I. A fine non-hydraulic filler. Cement and Concrete Research, 20(5), 778-782. https://doi.org/10.1016/0008-8846(90)90011-L
  8. Cussino, L., Negro, A., (1980), Hydration of aluminous cement in the presence of silicic and calcareous aggregates. Proe. 7th Int. Cong. on Chemistry of Cement, Paris.
  9. Fentiman, C. (1985), Hydration of carbo-aluminous cement at different temperatures, Cement and Concrete Research, 15(4), 622-630. https://doi.org/10.1016/0008-8846(85)90061-4
  10. Robson, J. D., (1952), Characteristics and Applications of Mixtures of Portland Cement and High-Alumina Cements, Chemistry and Industry, 1, 2-7.
  11. 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.
  12. Soroka, I., Setter, N., (1977), The effect of fillers on strength of cement mortars, Cement and Concrete Research, 7, 449-456. https://doi.org/10.1016/0008-8846(77)90073-4
  13. Klemm, W., Adams, L., (1990), An investigation of the formation of carboaluminates, Carbonate Additions to Cement, ASTM International.
  14. Kurdowski, W., (2014), Cement and Concrete Chemistry, Springer Science & Business.
  15. Mindess, S., Young, J. F., Darwin, D., (2003), Concrete 2nd Ed., Technical Documents.
  16. De Weerdt, K., Kjellsen, K. O., Sellevold, E., Justnes, H., (2011), Synergy between fly ash and limestone powder in ternary cements, Cement and Concrete Composites, 33, 30-38. https://doi.org/10.1016/j.cemconcomp.2010.09.006
  17. Antoni, M., Rossen, J., Martirena, F., Scrivener, K., (2012), Cement substitution by a combination of metakaolin and limestone, Cement and Concrete Research, 42(12), 1579-1589. https://doi.org/10.1016/j.cemconres.2012.09.006
  18. Balonis, M., Glasser, F. P., (2009), The Density of Cement Phases, Cement and Concrete Research, 39(9), 733-739. https://doi.org/10.1016/j.cemconres.2009.06.005