Fire resistance of the Mt. Epomeo Green Tuff, a widely-used building stone on Ischia Island (Italy) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Volcanica Année : 2018

Fire resistance of the Mt. Epomeo Green Tuff, a widely-used building stone on Ischia Island (Italy)

Michael Heap
  • Fonction : Auteur
  • PersonId : 923962
Alexandra Kushnir
Fabian Wadsworth
Gian Marco Marmoni
  • Fonction : Auteur
Matteo Fiorucci
  • Fonction : Auteur
Salvatore Martino
Patrick Baud
H. Albert Gilg
  • Fonction : Auteur
Thierry Reuschlé

Résumé

The use of Mt. Epomeo Green Tuff (MEGT) as a building stone is widespread on Ischia Island (Italy). We assess here the fire resistance of MEGT by thermally stressing samples to temperatures up to 1000 °C. Porosity and uniaxial compressive strength increase and decrease from 44% and 4.5 MPa at ambient temperature to 48% and 1.5 MPa following exposure to 1000 °C, respectively. Complementary thermogravimetric analysis, experiments that monitor acoustic emissions during heating/cooling, and microstructural observations highlight that these changes are the result of thermal microcracks, formed due to the dehydration and breakdown of zeolites and the thermal expansion/contraction of the glassy matrix. Although the stability of structures built from MEGT will be jeopardised at high temperature, a very low thermal diffusivity requires that fires must burn for many hours to compromise the strength of a typical dimension stone: tuffs are tough in the event of fire.
Fichier principal
Vignette du fichier
document-10.pdf (9.05 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01789370 , version 1 (18-02-2022)

Licence

Paternité

Identifiants

Citer

Michael Heap, Alexandra Kushnir, Luke Griffiths, Fabian Wadsworth, Gian Marco Marmoni, et al.. Fire resistance of the Mt. Epomeo Green Tuff, a widely-used building stone on Ischia Island (Italy). Volcanica, 2018, 1 (1), pp.33 - 48. ⟨10.30909/vol.01.01.3348⟩. ⟨hal-01789370⟩
108 Consultations
22 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More