International Journal of Concrete Structures and Materials

  • 제18권2E호
  • /
  • Pages.103-109
  • /
  • 2006
  • /
  • 1976-0485(pISSN)
  • /
  • 2234-1315(eISSN)
한국콘크리트학회 (Korea Concrete Institute)
권호 표지
DOI QR코드

DOI QR Code

Optimum PP Fiber Dosage for the Control of Spalling of High Strength Reinforced Concrete Columns

  • Yoo, Suk-Hyeong (Dept. of Architecture and Architectural Engineering, Hanyang University) ;
  • Shin, Sung-Woo (Dept. of Architecture and Architectural Engineering, Hanyang University) ;
  • Kim, In-Ki (Dept. of Architecture and Architectural Engineering, Hanyang University)
  • 발행 : 2006.09.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Spalling is defined as damages to concrete exposed to high temperature during fire, causing cracks and localized bursting of small pieces of concrete. As the concrete strength increases, the degree of damage caused by spalling becomes more serious due to impaired permeability. It is reported that polypropylene(PP) fiber has an important role in protecting concrete from spalling, and the optimum dosage of PP fiber is 0.2%. However, this study was conducted on non-reinforced concrete specimens. The high-temperature behavior of high-strength reinforced concrete columns with various concrete strength and various quantity of PP fibers is investigated in this study. The results revealed that the ratio of unstressed residual strength of columns increased as the concrete strength increased and as the quantity of PP fiber increased from 0% to 0.2%. However, the effect of PP fiber quantity on residual strength of column was barely above 0.2%.

키워드

참고문헌

  1. Bazant, Z. P. and Kaplan, M. F., Concrete at High Temperatures : Material Properties and Mathematical Models, Prentice Hall, 1996
  2. NIST, International Workshop on Fire Performance of High-Strength Concrete, Md Gaithersburg, Feb., 1997
  3. NIST IR5934, Fire Performance of High-Strength Concrete: A Report of the State-of-the-Art, NIST, Dec., 1996
  4. Sarvaranta, L. and Mikkola, E., 'Fiber Mortar Composites in Fire Conditions,' Fire Material, Vol.18, 1994, pp.45~50 https://doi.org/10.1002/fam.810180106
  5. Sarvaranta, L. and Mikkola, E., 'Fiber Mortar Composites in Fire Conditions,' Fire Material, Vol.18, 1994, pp.45~50 https://doi.org/10.1002/fam.810180106
  6. Sarvaranta, L. and Mikkola, E., 'Fiber Mortar Composites under Fire Conditions: Effects of Ageing and Moisture Content of Specimens,' Material Structure, Vol.27, 1994, pp.532~538 https://doi.org/10.1007/BF02473214
  7. Kalifa, P., 'High-Temperature Behaviour of HPC with Polypropylene Fibers from Spalling to Microstructures,' Cement and Concrete Research, Jun., 2001, pp.1487~1499
  8. Sarvaranta, L., Jarvela, E., and Mikkola, E., 'Fiber Mortar Composites Under Thermal Exposure,' Pluralis(Ed.), Proceedings of 2nd International Symposium on Textile Composites in Building Construction, Lyon, France, 23-25 June 1992, pp.47~56
  9. Bentz, D., 'Fibers, Percolation and Spalling of High PerFormance Concrete,' ACI material Journal, Vol.98, No.2, 2000, pp.351-359
  10. Kim, M. H., Yoon, H. D., Yoo, J. C., Kang, S. J., and Kim, G Y., 'Status of Research Trend and Performance Evaluation on Fire Resistance of Ultra-strength Concrete by Japanese Construction Companies,' Journal of Korea Concrete Institute, Vol.17, No.5, 2005. (in Korean)
  11. Han, C. G, Yang, S. H., Lee, B. Y., and Hwang, I. S., 'Investigation of Spalling of High Performance Concrete in Response to Various Aggregate Types and Various Quantity of Polypropylene Fiber,' Proceedings of Korea Concrete Institute, Vol.11, No.5, (53rd issue), 1999, pp.69~78. (in Korean)
  12. Kwon, Y. J., Chang, J. B., Na, C. S., and Kim, M. H., 'Trend of Research on Spalling of High-strength Concrete and Counter-Measures,' Special Issue of Korea Concrete Institute, Vol.17, No.3, (86th issue), 2005. (in Korean)
  13. Sullivan, P. J. E. and Sharshar, R., 'Performance of Concrete at Elevated Temperatures (as Measured by the Reduction in Compressive Strength),' Fire Technology, Vol.28, No.3, August, 1992, pp.240~250 https://doi.org/10.1007/BF01857693