期刊论文详细信息
Volcanica | |
Fire resistance of the Mt. Epomeo Green Tuff, a widely-used building stone on Ischia Island (Italy) | |
Fabian Wadsworth1  Luke Griffiths2  Salvatore Martino3  Matteo Fiorucci3  Gian Marco Marmoni3  H. Albert Gilg4  Michael Heap5  Patrick Baud6  Alexandra Kushnir6  Thierry Reuschlé6  | |
[1]Durham University | |
[2]Norwegian Geotechnical Institute: Oslo | |
[3]Sapienza University of Rome | |
[4]Technische Universität München | |
[5]University of Strasbourg | |
[6]Université de Strasbourg | |
关键词: Fire; Tuff; Strength; Acoustic emissions; Thermogravimetry; Porosity; | |
DOI : 10.30909/vol.01.01.3348 | |
来源: DOAJ |
【 摘 要 】
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 and X-ray powder diffraction analyses, 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 breakdown of zeolites and clays (MEGT contains 35 wt.% analcime, 15 wt.% smectite, and 3 wt.% illite) at high temperature. 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.【 授权许可】
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