Influence of polypropylene and steel fibres on thermal spalling and physical-mechanical properties of concrete under different heating rates - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Construction and Building Materials Année : 2020

Influence of polypropylene and steel fibres on thermal spalling and physical-mechanical properties of concrete under different heating rates

Résumé

Abstract This study investigates three concrete compositions: a control concrete, a reinforced concrete containing 60 kg/m3 of steel fibres, and a hybrid concrete containing 60 kg/m3 of steel fibres and 0.75 kg/m3 of polypropylene fibres. Cylindrical specimens were manufactured and subjected to two heating rates (10 °C/min and the ISO 834 fire standard) to study their spalling sensitivity. Moreover, unidirectional heat transfer and pressure measurements were performed on slabs heated at 10 °C/min to 600 °C. To understand the influence of fibres on spalling processes more clearly, the thermal properties were studied during heating and cooling: the gas permeability, compressive strength, and Young’s modulus of specimens were measured after a heating and cooling cycle at 0.5 °C/min. The results show that the spalling phenomenon was more severe for cylindrical specimens than for slabs. The addition of 60 kg/m3 of steel fibres had an unfavourable influence on spalling, especially during the ISO 834 fire test. The addition of 0.75 kg/m3 of polypropylene fibres allowed the concretes containing steel fibres to avoid spalling, regardless of the thermal loading conditions.
Fichier principal
Vignette du fichier
S0950061820316950.pdf (1.67 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03490828 , version 1 (22-08-2022)

Licence

Identifiants

Citer

N. Algourdin, P. Pliya, A.-L. Beaucour, A. Simon, A. Noumowé. Influence of polypropylene and steel fibres on thermal spalling and physical-mechanical properties of concrete under different heating rates. Construction and Building Materials, 2020, 259, pp.119690 -. ⟨10.1016/j.conbuildmat.2020.119690⟩. ⟨hal-03490828⟩
49 Consultations
66 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More