대한건축학회논문집 (Journal of the Architectural Institute of Korea)

  • 제38권7호
  • /
  • Pages.255-262
  • /
  • 2022
  • /
  • 2733-6239(pISSN)
  • /
  • 2733-6247(eISSN)
대한건축학회 (Architectural Institute of Korea)
권호 표지
DOI QR코드

DOI QR Code

마이크로 강섬유가 혼입된 경량골재 콘크리트의 인성지수 평가

Evaluation on Toughness Index of Lightweight Aggregate Concrete with Microsteel Fibers

  • Lee, Hye-Jin (Department of Architectural Engineering, Kyonggi University) ;
  • Kim, Hak-Young (Department of Architectural Engineering, Kyonggi University) ;
  • Yang, Keun-Hyeok (Department of Architectural, Kyonggi University) ;
  • Lee, Young-Ho (Department of Architecture, Tongwon University)
  • 투고 : 2022.03.13
  • 심사 : 2022.05.24
  • 발행 : 2022.07.30
⟨ 이전 논문 다음 논문 ⟩

초록

This study aimed to estimate the effect of the volumetric fraction(Vf) and shape of microsteel fibers on improving the toughness of lightweight aggregate concrete (LWAC). For LWAC mixes designed at the targeted compressive strength of 40 MPa, Vf of hooked-end steel fibers varied up to 1.0% at an interval of 0.25%, beyond which combination of hooked-end and straight steel fibers were applied up to Vf of 1.5%. The compressive and flexural toughness indices(Ic&T150) determined from the prepared LWAC specimens were assessed with respect to fiber reinforcing index(𝛽f) and compared with those compiled from the previous normal-weight concrete (NWC) reinforced with the conventional steel fibers. microsteel fiber reinforced LWAC specimens exhibited Ic and T150 values similar to those of conventional steel fiber-reinforced NWC when 𝛽f was less than 1.0. Meanwhile, LWAC specimens reinforced with hybrid hooked-end and straight microsteel fibers at 𝛽f exceeding 1.05 exhibited higher Ic and T150 values than conventional steel fiber-reinforced NWC. This implies that the use of hybrid hooked-end and straight microsteel fibers is promising in improving the ductility of LWAC.

키워드

과제정보

본 연구는 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었음(과제번호 22NANO-C156177-03).

참고문헌

  1. ASTM C1018-97 (1998). Standard Test Methods for Flexural Toughness and First Crack Strength of Fiber Reinforced Concrete, American Society for Testing and Materials, West Conshohocken, PA, USA: ASTM International, 506-513.
  2. ASTM C1609/C1609M-12 (2012). Standard Test Method for Flexural Performance of Fiber Reinforced Concrete, American Society for Testing and Materials, West Conshohocken, PA, USA: ASTM International,
  3. ACI Committee 318 (2019). Building Code Requirements for Structural Concrete (ACI 318-19). and Commentary. American Concrete Institute, MI, Farmington Hills,
  4. Beaudoin, J. J. (1990). Handbook of Fiber-Reinforced Concrete: Principles, Properties, Developments and Applications, USA: Noyes Publications, Park Ridge, 1-332.
  5. Guler, S. (2018). The Effect of Polyamide Fibers on the Strength and Toughness Properties of Structural Lightweight Aggregate Concrete. Construction and Building Materials, 173, 394-402. https://doi.org/10.1016/j.conbuildmat.2018.03.212
  6. Im, C. R., Yang, K. H., & Mun, J. H. (2020). Assessment on Maximum Longitudinal Reinforcement Ratios for Reinforced Lightweight Aggregate Concrete Beams. Journal of the Korea Concrete Institute, 32(5), 419-425. (In Korean) https://doi.org/10.4334/jkci.2020.32.5.419
  7. Kayali, O., Haque, M. N., & Zhu, B. (2003). Some Characteristics of High Strength Fiber Reinforced Lightweight Aggregate Concrete. Cement and Concrete Composites, 25(2), 207-213. https://doi.org/10.1016/S0958-9465(02)00016-1
  8. Koksal, F., Altun, F., Yigit, I., & Sahin, Y. (2008). Combined Effect of Silica Fume and Steel Fiber on the Mechanical Properties of High Strength Concretes, Construction and Building Materials, 22(8), 1874-1880. https://doi.org/10.1016/j.conbuildmat.2007.04.017
  9. Kwon, Y. H., & Lee, T. W. (2017). An Experimental Study on the Strength Development of High Strength Concrete in Various Curing Conditions at an Early-Age. Journal of the Korea Concrete Institute, 29(2), 141-148. (In Korean) https://doi.org/10.4334/JKCI.2017.29.2.141
  10. Ku, D. O., Kim, S. D., Kim, H. S., & Choi, K. K. (2014). Flexural Performance Characteristics of Amorphous Steel Fiber-Reinforced Concrete. Journal of the Korea Concrete Institute, 26(4), 483-489. (In Korean) https://doi.org/10.4334/JKCI.2014.26.4.483
  11. Lee, K. I., Mun, J. H., Park, Y. S., & Yang, K. H. (2019). A Fundamental Study to Develop Low-CO High-Insulation Lightweight Concrete Using Bottom Ash Aggregates and Air Foam. Cement and Concrete Research, 31(3), 221-228.
  12. Lee, K. H., & Yang, K. H. (2018). Mix Design Procedure of Structural Concrete Using Artificial Lightweight Aggregates Produced from Bottom Ash and Dredged Soils. The Korean Institute of Building Construction, 18(2), 133-140. (In Korean)
  13. Lee, K. H. (2018). Reliable Model Proposals for Mechanical Properties and Mixing Proportioning of Lightweight Aggregate Concrete Using Expanded Bottom Ash and Dredged Soil Granules. Ph.D. Kyonggi University,
  14. Liu, X., Wu, T., & Liu, Y. (2019). Stress-Strain Relationship for Plain and Fiber-Reinforced Lightweight Aggregate Concrete. Construction and Building Materials, 225, 256-272. https://doi.org/10.1016/j.conbuildmat.2019.07.135
  15. Lee, S., Park, Y., & Abolmaali, A. (2019). Investigation of Flexural Toughness for Steel-and-Synthetic-Fiber-Reinforced Concrete Pipes. Journal of the Institution of Structural Engineers, 19, 203-211.
  16. Park, J. S., Kim, Y. J., Cho, J. R., & Jeon, S. J. (2015). Early-Age Strength of Ultra-High Performance Concrete in Various Curing Conditions. Journal of Materials Published by MDPI AG Base Switzerland, 8, 5537-5553.
  17. Yang, K. H. (2014). Tests on Concrete Reinforced with Hybrid or Monolithic Steel and Polyvinyl Alcohol Fibers. ACI Materials Journal, 108(6), 664-672.
  18. Ye, Y. X., Liu, J. L., Zhang, Z. Y., Wang, Z. G., & Peng, Q. G. (2020). Experimental Study of High-Strength Steel Fiber Lightweight Aggregate Concrete on Mechanical Properties and Toughness Index. Advances in Materials Science and Engineering, 2020, 1-10.