Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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A Study on Economically-Efficient Binder Combination of 80MPa Ultra High Strength Concrete

경제성을 고려한 80MPa급 초고강도 콘크리트의 결합재 조합에 대한 검토

  • Park, Chun-Jin (Department of Architectural Engineering, Cheong-ju University, Korea Institute of Civil Engineering and Building Technology) ;
  • Koh, Kyung-Teak (Korea Institute of Civil Engineering and Building Technology) ;
  • Ryu, Gum-Sung (Korea Institute of Civil Engineering and Building Technology) ;
  • Ahn, Gi-Hong (Korea Institute of Civil Engineering and Building Technology) ;
  • Ahn, Sang-Ku (Posco E&C)
  • 박천진 (청주대학교 건축공학과, 한국건설기술연구원 구조융합연구소) ;
  • 고경택 (한국건설기술연구원 구조융합연구소) ;
  • 류금성 (한국건설기술연구원 구조융합연구소) ;
  • 안기홍 (한국건설기술연구원 구조융합연구소) ;
  • 안상구 (포스코건설)
  • Received : 2015.03.13
  • Accepted : 2015.03.25
  • Published : 2015.03.30
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Abstract

Silica fume is generally adopted as admixture for Ultra High Strength Concrete (UHSC) owing to its remarkable contribution to the strength and durability but increases significantly the fabrication cost of UHSC. Accordingly, this study investigates the replacement of silica fume by blast furnace slag (BS) and fly ash (FA) in order to lower the fabrication cost of 80MPa-UHSC. To that goal, experiment is conducted on the mix proportions of mortar in terms of its binder combination, water-to-binder ratio (W/B) and unit binder content. Based on the experimental data, a mix design of concrete is derived and its properties are verified. The results reveal that a W/B of 21% and unit binder content of $720kg/m^3$ are appropriate to achieve 80MPa-UHSC using a binder composed of 60% of OPC, 30% of BS and 10% of FA. The properties of the corresponding UHSC are seen to be satisfactory with a slump flow of 715mm and compressive strength of 97MPa at 28days. The application of the binder combination derived in this study is analyzed to reduce the cost by 50% of binder compared to the mix using silica fume while realizing equivalent performance.

초고강도 콘크리트의 혼화재로는 일반적으로 실리카퓸(SF)을 사용한다. 실리카퓸은 강도, 내구성 측면에서 유리하나 제조원가를 상승시키는 원인이 된다. 따라서 본 연구에서는 80MPa급 초고강도 콘크리트의 제조원가를 낮추기 위하여 실리카퓸 대신에 고로슬래그(BS)와 플라이애시(FA)에 대해 검토하였다. 실험은 모르타르 배합으로 결합재 조합, 물-결합재비 및 단위결합재량에 대해 검토하였고, 그 결과를 토대로 콘크리트 배합설계를 통하여 물성에 대하여 검증하였다. 그 결과 압축강도 80MPa를 달성하기 위한 결합재는 OPC 60% BS 30%, FA10%로 구성하고, 물-결합재비는 21%, 단위 결합재량은 $720kg/m^3$이 적절한 것으로 분석되었다. 상기 도출된 결합재 조합, W/B 및 단위 결합재량을 반영한 콘크리트 배합에서 슬럼프 플로우는 715mm, 28일 압축강도는 97MPa로 양호하게 나타났다. 본 연구에서 도출한 결합재 조합을 사용하는 경우 실리카퓸을 사용한 결합재에 비하여 동등한 성능을 발휘하면서 약 50%의 결합재 비용을 절감할 수 있는 것으로 분석되었다.

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References

  1. Choi, K.C., Kim, K.Y., Kim H.S., Yoon, M.H., Lee, J., Kim, M.H. (2014). A Study on the Degradation of Compressive Strength and Stiffness of Normal and High Strength Concrete with Heating, Proceeding of the Korea Concrete Institute, 26(1), 535-536.
  2. Choi, K.C., Yoon, M.H., Lee, T.K., Lee, S.H., Kim, K.Y. (2013). Evaluation of Properties of 80, 130, 180MPa High Strength Concrete at High Temperature with Heating and Loading, Journal of the Korea Concrete Institute, 25(6), 613-620. https://doi.org/10.4334/JKCI.2013.25.6.613
  3. Choi, S., Kim, K.M., Song, Y.S., Kang, S.H., Song, Y.C., Kim, Y.R.(2011). Mock-up Test for Shrinkage Evaluation on Ultra High Performance Concrete Added Admixture for Reducing the Autogenous Shrinkage, Proceeding of the Korea Concrete Institute, 23(1), 505-506.
  4. Keum, K.H., Kang, C.W., Lee, W.J., Seo, S.H., Park, K.Y., Kim, K.Y. (2012). A Study on Practical Use of High Strength Concrete Using High Early-Strength Type Cement, Proceeding of the Korea Concrete Institute, 24(2), 461-462.
  5. Kim, C.Y., Jung, S.J., Kim, S.D., Lim, N.G., Kim, K.J., Son, I.S. (2012), Hydration Temperature Charateristics of Ultra-High Strength Concrete for Concrete Filled Steel Tube(CFT), Proceeding of the Korea Concrete Institute. 24(1), 155-156.
  6. Kim. S.D., Lee, B.S., Bae, K.S., Kim, S.Y., Park, S.H. (2009). Flowability and Strength Properties of 80MPa High Strength Concrete with Fiber, Proceeding of the Korea Concrete Institute, 21(2), 409-410. https://doi.org/10.4334/JKCI.2009.21.4.409
  7. Koh, K.T., Park, J.J., Kim, S.W., Lee, J.H. (2004). A experimental study on the reduction of shrinkage of high performance concrete, Journal of KSCE 24(3), 501-508.
  8. Korean Recycled Construction Resource Institut. (2014). Technology for Present & Future of Recycled Construction Resource.
  9. Kwon, I.P., Kim, Y.R., Wee, D.S., Park, C.H., Joo, D.C., Kim, J.H. (2006). A Study on Ultra High Strength Concrete with the Domestic Materials. Proceeding of the Korea Concrete Institute, 18(2), 433-436.
  10. Lee, B.S., Kim, S.D., Jeon, M.D., Park, S.S., Park, S.H., Jeong, S.J. (2012). The Effect of Blast-furnace slag and Fly ash of 80MPa High Strength Concrete with Ternary Cement, Proceeding of the Korea Concrete Institute, 24(1), 343-344.
  11. Lee, J.H., Moon, H.J., Kim, J.J. (2012). An Experimental Study on Pumpability Characteristics of High Strength Concrete Mixed Polymix. Journal of the Korea Concrete Institute, 24(5), 509-516. https://doi.org/10.4334/JKCI.2012.24.5.509
  12. Lee, J.H., Yang, J.M., Lee, S.H., Yoon, Y.S., (2007). Improved Transmission of UHSC Column Loads by Puddling of Fiber Reinforced UHSC , Journal of the Korea Concrete Institute 19(2), 209-216. https://doi.org/10.4334/JKCI.2007.19.2.209
  13. Lee, S.Y., Song, J.J., Lee, Y.H. (2012). An Experimental Study on the Lap Splice Length of Steel Reinforcing Bars Applied to the Ultra High Strength Concrete, Proceeding of the Korea Concrete Institute, 24(2), 473-474. https://doi.org/10.4334/JKCI.2012.24.4.473
  14. Lee, Y.W., Lim, K.Y., Choi, K.C., Lee, B,K., Miyauchi, H. (2014). Evaluation on Properties of Creep of Ultra High Strength Concrete Considering High Temperature, Proceeding of the Korea Concrete Institute, 26(1), 291-292.
  15. Lim, D.H. (2005). Mechanical Behavior of Plain and Steel Fiber Reinforced High Strength Concrete under Biaxial Compression, Journal of the Korea Concrete Institute, 17(5), 803-809. https://doi.org/10.4334/JKCI.2005.17.5.803
  16. Moon, H.J., Kim, K.Y., Koo, K.M., Kim, H.S., Kim, Y.H, Lee, J.S. (2011). Modulus of Elasticity for Range from 80 to 100MPa in High-Strength Concrete, Proceeding of the Korea Concrete Institute, 23(1), 545-506.
  17. Oh, H.S., Kim, M.W., Lee, S.T., Oh, K.J., Kang, C. (2014). Compressive Strength Estimation of High-Strength Concrete by Ultrasonic Pulse Velocity Test, Proceeding of the Korea Concrete Institute, 26(1), 285-286.
  18. Park, J.J., Ahn, K.H., Ryu, G.S., Kang, S.T., Kim, S.W., Lee, J.H. (2010). The Experimental Study on the Durability of the 70, 100MPa Grade High Strength Concrete with the Land Sand, Proceeding of the Korea Concrete Institute, 22(1), 201-202.
  19. Yang, J.M., Shin, H.O., Min, K.H., Yoon, Y.S., (2011). Flexural Behavior of FRP Bar Reinforced HSC Beams with Different Types of Reinforcing Bar and Fiber, Journal of the Korea Concrete Institute, 23(3), 273-280. https://doi.org/10.4334/JKCI.2011.23.3.273
  20. Yoo, W.H., Park, S.H., Lee, W.J., Jeong, Y.S. (2013). Study of the Applicability of Factory Product of 100MPa Class High Strength Concrete Using Type III Cement Base Binder, Proceeding of the Korea Concrete Institute, 25(2), 103-104.
  21. Yoon, J.H., Jeon, J.K., Jo, S.H., Han, H.S., Kim, J.B., Lee, D.G. (2012). Evaluation on the Properties of UHSC for Modular Bridge Connection, Proceeding of the Korea Concrete Institute, 24(1), 867-868.