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60. Spalling and stress-strain behaviour of polypropylene fibre reinforced HPC after exposure to high temperatures



Title: 60. Spalling and stress-strain behaviour of polypropylene fibre reinforced HPC after exposure to high temperatures
Author(s): R.V. Velasco, R.D. Toledo Filho, E.M.R. Fairbairn, P.R.L. Lima, R. Neumann
Paper category : conference
Book title: 6th International RILEM Symposium on Fibre Reinforced Concretes
Editor(s): M. di Prisco, R. Felicetti and G.A. Plizzari
Print-ISBN: 2-912143-51-9
e-ISBN: 2912143748
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 699 - 708
Total Pages: 10
Nb references: 7
Language: English


Abstract: It is well known that physical and mechanical properties of high performance concrete (HPC) are affected by thermal exposure. Its dense microstructure can provide durability and high strength but may lead to a brittle behaviour when submitted to high temperatures. This work describes the stress-strain behaviour of polypropylene fibre reinforced high performance concrete exposed to ambient temperature (27ºC) and to temperatures of 400, 650 and 900oC. The compressive strength and elastic modulus were determined after allowing the samples to cool down to room temperature. A change in the water porosity of the concrete with heating was measured by water absorption tests. The role of polypropylene fibre to control the spalling of HPC was also investigated. The results indicated that the spalling observed in the matrices is significantly reduced with the fibre addition.


Online publication: 2004-08-30
Publication type : full_text
Public price (Euros): 0.00