Advances in concrete construction

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Spalling of heated high performance concrete due to thermal and hygric gradients

  • Zhang, Binsheng (School of Engineering and Built Environment, Glasgow Caledonian University) ;
  • Cullen, Martin (School of Engineering and Built Environment, Glasgow Caledonian University) ;
  • Kilpatrick, Tony (School of Engineering and Built Environment, Glasgow Caledonian University)
  • Received : 2015.07.09
  • Accepted : 2016.03.24
  • Published : 2016.03.25
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Abstract

In this study, high performance concrete beams and prisms with high content of PFA were heated to various temperatures up to $450^{\circ}C$ at heating rates of $1^{\circ}C/min$, $3^{\circ}C/min$ and $10^{\circ}C/min$. The thermal gradient was found to increase first with the heating time until a peak value was reached and then decrease until the thermal equilibrium was reached, measured as $115^{\circ}C$, $240^{\circ}C$ and $268^{\circ}C$ for the three heating rates. Spalling occurred on some specimens when the heating temperature was over $400^{\circ}C$ for heating rates of $3^{\circ}C/min$ and $10^{\circ}C/min$. The hygric gradient was found to reach its maximum when the thermal gradient reached its peak. This study indicates that spalling of HPC could happen when the heating temperature was high enough, and both thermal and hygric gradients reached their maxima.

Keywords

References

  1. Ali, F.A. (2002), "Is high performance concrete more susceptible to explosive spalling than normal strength concrete in fire?", Fire Mater., 26(3), 127-130. https://doi.org/10.1002/fam.791
  2. Ali, F.A., O'Connor, D. and Abu-Tair, A. (2001), "Explosive spalling of high-strength concrete columns in fire", Mag. Concrete Res., 53(3), 197-204. https://doi.org/10.1680/macr.2001.53.3.197
  3. Arita, F., Harada, K. and Miyamoto, K. (2002), "Thermal spalling of high-performance concrete during fire", Second International Workshop on Structures in Fire, Christchurch, New Zealand, 253-261.
  4. Bentz, D. (2000), "Fibers, percolation, and spalling of high-performance concrete", ACI Mater. J., 97(3), 351-359.
  5. Castillo, C. and Durrani, A.J. (1990), "Effect of transient high temperature on high-strength-concrete", ACI Mater. J., 87(1), 47-53.
  6. Dong, X., Ding, Y. and Wang, T. (2008), "Spalling and mechanical properties of fiber reinforced high-performance concrete subjected to fire", J. Wuhan University of Tech.-Mater. Sci. Ed., 743-749.
  7. Dwaikat, M.B. and Kodur, V.K.R. (2008), "A numerical approach for modeling the fire induced restraint effects in reinforced concrete beams", Fire Safety J., 43(4), 291-307. https://doi.org/10.1016/j.firesaf.2007.08.003
  8. Dwaikat, M.B. and Kodur, V.K.R. (2009a), "Hydrothermal model for predicting fire-induced spalling in concrete structural systems", Fire Safety J., 44(3), 425-434. https://doi.org/10.1016/j.firesaf.2008.09.001
  9. Dwaikat, M.B. and Kodur, V.K.R. (2009b), "Fire induced spalling in high strength concrete beams", Fire Tech., 46(1), 251-274. https://doi.org/10.1007/s10694-009-0088-6
  10. Hertz, K.D. (2003), "Limits for spalling of fire-exposure concrete", Fire Safety J., 38(2), 103-116. https://doi.org/10.1016/S0379-7112(02)00051-6
  11. Hertz, K.D. and Sorensen, L.S. (2005), "Test method for spalling of fire exposure concrete", Fire Safety J., 40(5), 466-476. https://doi.org/10.1016/j.firesaf.2005.04.001
  12. Kanema, M., Pliya, P., Noumowe, A. and Gallias, J. (2011), "Spalling, thermal, and hydrous behavior of ordinary and high-strength concrete subjected to elevated temperature", J. Mater. Civil Eng., 23(7), 921-930. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000272
  13. Ko, J., Ryu, D. and Noguchi, T. (2011), "The spalling mechanism of high strength concrete under fire", Mag. Concrete Res., 63(5), 357-370. https://doi.org/10.1680/macr.10.00002
  14. Kodur, V.K.R. (1998), "Fire performance of high-strength concrete structural members", Can. J. Civil Eng., 25(6), 975-981. https://doi.org/10.1139/l98-023
  15. Kodur, V.K.R. (2000), "Spalling in high-strength concrete exposed to fire: concerns, causes, critical parameters and cures", Adv. Tech. Struct. Eng., Ed by Mohamed Elgaaly P.E., 1-9.
  16. Kodur, V.K.R. and Phan, L. (2007), "Critical factors governing the fire performance of high strength concrete systems", Fire Safety J., 42(6), 482-488. https://doi.org/10.1016/j.firesaf.2006.10.006
  17. Morita, T., Nishida, A. and Yamazaki, N. (1999), "An experimental study on spalling of high strength concrete elements under fire attack", Fire Safety Science-the Proceeding of the Sixth International Symposium, July 5-9, 1999, Poitiers, France, 855-866.
  18. Ozbolt, J., Kozar, I., Eligehausen, R. and Periskic, G. (2005), "Three-dimensional FE analysis of headed stud anchors exposed to fire", Comput. Concrete, 2(4), 249-266. https://doi.org/10.12989/cac.2005.2.4.249
  19. Savov, K., Lackner, R. and Mang, H.A. (2005), "Stability assessment of shallow tunnels subjected to fire load", Fire Safety J., 40(8), 745-763. https://doi.org/10.1016/j.firesaf.2005.07.004
  20. Sullivan, P.J.E. (2001), "Deterioration and spalling of high strength concrete under fire", Offshore Technology Report 2001/074, City University, London.
  21. Zeimla, M., Lacknera, R., Pesaventoc, F. and Schrefler, B.A. (2008), "Thermo-hydro-chemical couplings considered in safety assessment of shallow tunnels subjected to fire load", Fire Safety J., 43(2), 83-95. https://doi.org/10.1016/j.firesaf.2007.05.006
  22. Zhang, B. (2011), "Effects of moisture evaporation (weight loss) on fracture properties of high performance concrete subjected to high temperatures", Fire Safety J., 46(8), 543-549. https://doi.org/10.1016/j.firesaf.2011.07.010
  23. Zhang, B. and Bicanic, N. (2002a), "Residual fracture toughness of normal-and high-strength gravel concrete after heating to $600^{\circ}C$", ACI Mater. J., 99(3), 217-226.
  24. Zhang, B. and Bicanic, N. (2006), "Fracture energy of high-performance concrete at high temperatures up to $450^{\circ}C$: the effects of heating temperatures and testing conditions (hot and cold)", Mag. Concrete Res., 58(5), 277-288. https://doi.org/10.1680/macr.2006.58.5.277
  25. Zhang, B., Bicanic, N., Pearce, C.J. and Balabanic, G. (2000), "Residual fracture properties of normal-and high-strength concrete subject to elevated temperatures", Mag. Concrete Res., 52(2), 123-136. https://doi.org/10.1680/macr.2000.52.2.123
  26. Zhang, B., Bicanic, N., Pearce, C.J. and Phillips, D.V. (2002b), "Relationship between brittleness and moisture loss of concrete exposed to high temperatures", Cement Concrete Res., 32(3), 363-371. https://doi.org/10.1016/S0008-8846(01)00684-6
  27. Zhang, B., Cullen, M. and Kilpatrick, T. (2013), "Fracture toughness of high performance concrete subjected to elevated temperatures: the effects of heating temperatures and testing conditions (hot and cold)", The 2013 International Conference on Computational Technologies in Concrete Structures, 8-12 September 2013, Jeju, Korea.
  28. Zhang, H.L. and Davie, C.T. (2013), "A numerical investigation of influence of pore pressures and thermally induced stresses for spalling of concrete exposed to elevated temperatures", Fire Safety J., 59, 102-110. https://doi.org/10.1016/j.firesaf.2013.03.019
  29. Zhao, J., Zheng, J.J., and Peng, G.F. (2011), "Fire spalling modeling of high performance concrete", Appl. Mech. Mater., 52-54, 378-383. https://doi.org/10.4028/www.scientific.net/AMM.52-54.378
  30. Zheng,W.Z., Hou, X.M., Shi, D.S. and Xu, M.X. (2010), "Experimental study on concrete spalling in prestressed slabs subjected to fire", Fire Safety J., 45(5), 283-297. https://doi.org/10.1016/j.firesaf.2010.06.001

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