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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Material Strength and Deformation Performance of Highly Ductile High-Strength Cement Composite

높은 연성을 갖는 고강도 시멘트계 복합체의 재료강도 및 변형성능

  • Received : 2019.11.30
  • Accepted : 2020.01.06
  • Published : 2020.02.29
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Abstract

The purpose of this study is to investigate experimentally the material strength and tensile deformation behavior of highly ductile high-strength cement composites reinforced by synthetic fibers. Materials and mixture proportions were designed to make composites with a strength level of 80 MPa in compression. Two kinds of polyethylene fibers with different properties were employed as reinforcing fibers. A series of experiments on density, compressive strength, and deformation performance was performed. Experimental results showed that the tensile behavior and cracking patterns of cement composite strongly depends on the types of reinforcing fibers. It was also demonstrated that the cement composite with a compressive strength of 77.7 MPa and a tensile strain capacity of 7.9% can be manufactured by using a proper polyethylene fiber.

이 논문의 목적은 다른 종류의 폴리에틸렌 섬유로 보강한 높은 연성을 갖는 고강도 시멘트계 복합체의 재료강도와 인장변형거동을 실험적으로 연구하는 것이다. 이를 위하여 압축강도 80 MPa 수준의 재료 및 배합을 결정하였고, 보강 섬유로서 2 종류의 폴리에틸렌 섬유를 사용하였다. 그리고 밀도, 압축강도, 1축 인장변형에 대한 일련의 실험을 수행하였다. 실험결과 시멘트계 복합체의 인장거동과 균열 패턴은 보강 섬유의 특성에 크게 영향을 받는 것으로 나타났다. 또한 적절한 폴리에틸렌 섬유를 사용함으로써 재료의 압축강도가 77.7 MPa 이고, 인장변형성능이 7.9% 변형률인 시멘트계 복합체의 제조가 가능하다는 것을 확인하였다.

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References

  1. Van Damme, H. (2018), Concrete material science: Past, present, and future innovations. Cement and Concrete Research, 112, 5-24. https://doi.org/10.1016/j.cemconres.2018.05.002
  2. Mindess, S., Young, J. F., and Darwin, D. (2002). Concrete (Second Edition ed.).
  3. Maalej, M., and Li, V. C. (1994), Flexural/tensile-strength ratio in engineered cementitious composites, Journal of Materials in Civil Engineering, ASCE, 6(4), 513-528. https://doi.org/10.1061/(ASCE)0899-1561(1994)6:4(513)
  4. Li, V. C., Wang, S., and Wu, C. (2001), Tensile Strain-Hardening Behavior of PVA-ECC, ACI Materials Journal, 98(6), 483-492.
  5. Association Francaise de Genie Civil (2002), Ultra High Performance Fibre-Reinforced Concretes-Interim Recommendations, Paris, France.
  6. Russel, H. G,. and Graybeal, B. A. (2013), Ultra-High Performance Concrete: A State-of-the-Art Report for the Bridge Community, Federal Highway Administration, McLean.
  7. Kanda, T., Li, V. C. (2006), Practical design criteria for saturated pseudo strain hardening behavior in ECC, Journal of Advanced Concrete Technology, 4, 59-72. https://doi.org/10.3151/jact.4.59
  8. Choi, J.-I., Park, S. E., and Lee, B. Y. (2017), Compressive Strength and Tensile Behavior of Ultra-High Performance Concrete and High-Ductile Cementless Composite. Journal of the Korea institute for structural maintenance and inspection, 21(3), 69-75. https://doi.org/10.11112/jksmi.2017.21.3.069
  9. Choi, J.-I., Park, S.-E., Lee, B. Y., and Kim, Y. Y. (2018), Tensile Properties of Polyethylene Fiber-Reinforced Highly Ductile Composite with Compressive Strength of 100 MPa Class. Journal of the Korea Concrete Institute, 30(5), 497-503. https://doi.org/10.4334/JKCI.2018.30.5.497
  10. Kang, S.-T., Choi, J.-I., Koh, K.-T., Lee, K. S., and Lee, B. Y. (2016), Hybrid effects of steel fiber and microfiber on the tensile behavior of ultra-high performance concrete. Composite Structures, 145, 37-42. https://doi.org/10.1016/j.compstruct.2016.02.075
  11. Yoo, D.-Y., and Kim, M.-J. (2019), High energy absorbent ultra-high-performance concrete with hybrid steel and polyethylene fibers. Construction and Building Materials, 209, 354-363. https://doi.org/10.1016/j.conbuildmat.2019.03.096
  12. Ranade, R., Li, V. C., Stults, M. D., Heard, W. F., and Rushing, T. S. (2013), Composite properties of high-strength, high-ductility concrete. ACI Materials Journal, 110(4), 413-422.
  13. Yu, K.-Q., Yu, J.-T., Dai, J.-G., Lu, Z.-D., & Shah, S. P. (2018), Development of ultra-high performance engineered cementitious composites using polyethylene (PE) fibers. Construction and Building Materials, 158, 217-227. https://doi.org/10.1016/j.conbuildmat.2017.10.040
  14. Yu, K.-Q., Zhu, W.-J., Ding, Y., Lu, Z.-D., Yu, J.-t., and Xiao, J.-Z. (2019), Micro-structural and mechanical properties of ultra-high performance engineered cementitious composites (UHP-ECC) incorporation of recycled fine powder (RFP). Cement and Concrete Research, 124, 105813. https://doi.org/10.1016/j.cemconres.2019.105813
  15. Li, V. C., and Leung, C. K. (1992), Steady-state and multiple cracking of short random fiber composites, Journal of Engineering Mechanics, 118(11), 2246-2264. https://doi.org/10.1061/(ASCE)0733-9399(1992)118:11(2246)