Fire Spalling Behaviour of Concrete: Role of Mechanical Loading (Uniaxial and Biaxial) and Cement Type

Abstract:

Fire poses one of the most severe environmental conditions that can act on concrete structures as an external load and can induce severe damages (cracks, spalling) or even lead to collapse. Fire spalling of concrete is a complex phenomenon, which might occur due to pressure build-up in the pores, thermal and load-induced stresses. In this context, ordinary concrete specimens (B40-II and B40-III: fc_28days ≈ 40 MPa) were exposed to standard fire curve (ISO 834-1), while a constant uniaxial or biaxial compressive load was applied. Six different levels of uniaxial compressive stress on cubes and four different levels of biaxial compressive stress on slabs have been investigated. The test results showed that loaded specimens are more susceptible to spalling than unloaded specimens, with increasing amount of spalling for higher values of applied load. It has been found that biaxially loaded specimens are more prone to spalling than uniaxially loaded specimens. B40-II concrete (3% of slag) exhibited higher spalling than the B40-III concrete (43% of slag).

• Periodical: Key Engineering Materials (Volume 711)
• Pages: 549-555
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.711.549
• Online since: September 2016
• Authors: Md Jihad Miah*, Francesco Lo Monte, Roberto Felicetti, Hélène Carré, Pierre Pimienta, Christian La Borderie
• Keywords: Concrete, Cracking, Mechanical Loading, Permeability, Spalling, Standard Fire

References

[1] Kalifa, P., Menneteau, FD., and Quenard, D. (2000). Spalling and Pore Pressure in HPC at High Temperatures, Cement and Concrete Research (2000), Vol. 30, p.1915-(1927).

DOI: 10.1016/s0008-8846(00)00384-7

[2] Khoury G. A., Anderberg Y. (2000), Concrete Spalling Review, Fire Safety Design, report submitted to the Swedish National Road Administration, Sweden.

[3] Mindeguia JC. (2009). Contribution Expérimental a la Compréhension des risqué d'Instabilité Thermiques des Béton", PhD Thesis (French), Université de Pau et des Pays de l, Adour, France.

[4] Boström, L., Wickström, U., Adl-Zarrabi B. (2007). Effect of Specimen Size and Loading Conditions on Spalling of Concrete, Fire and Materials, 31, pp.173-186.

DOI: 10.1002/fam.931

[5] Kodur, V. K. R., and Phan, L. (2007). Critical Factors Governing the Fire Performance of High Strength Concrete Systems, Fire Safety Journal 42, pp.482-488.

DOI: 10.1016/j.firesaf.2006.10.006

[6] Castillo, C. and Durrani, A. J. (1990). Effect of Transient High Temperature on High-Strength Concrete, ACI Materials Journal, V. 87, No. 1, pp.47-53.

[7] Carré, H., Pimienta, P., La Borderie, C., Pereira, F., and Mindeguia, J. C. (2013).

[8] Lo Monte, F., Rossino, C., and Felicetti, R. (2015). Spalling Test on Concrete Slabs under Biaxial Membrane Loading, Proceedings of the 4th International Workshop on Concrete Spalling due to Fire Exposure, October 8-9, 2015, Leipzig, Germany.

DOI: 10.1617/s11527-019-1318-0

[9] Miah, M. J., Pimienta, P., Carré, H., Pinoteau, N., and La Borderie, C. (2015).

[10] Miah, M. J., Carré, H., Pimienta, P., Pinoteau, N., and La Borderie, C. (2015).

[11] Miah, M. J., Lo Monte, F., Pimienta, P and Felicetti, R. (2016).

[12] Felicetti, R and Lo Monte, F. (2016). Pulse-Echo Monitoring of Concrete Damage and Spalling during Fire, Proceedings of the 9th International Conference on Structures in Fire, June 8-10, 2016, Princeton, USA.