Determination of thermal conductivity variation through Modified Transient Plane Source (MTPS), and its relationship with porosity variation on thermally treated Prada limestone
| Autor: | Víctor Martínez-Ibáñez, C. Hidalgo Signes, M. E. Garrido, Roberto Tomás |
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| Přispěvatelé: | Universidad de Alicante. Departamento de Ingeniería Civil, Ingeniería del Terreno y sus Estructuras (InTerEs) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Porosity variation
Work (thermodynamics) Materials science biology Plane (geometry) Prada limestone Variation biology.organism_classification Ingeniería del Terreno Thermal conductivity Modified Transient Plane Source (MTPS) Geotechnical engineering Transient (oscillation) Variation (astronomy) Porosity Valencia |
| Zdroj: | RUA. Repositorio Institucional de la Universidad de Alicante Universidad de Alicante (UA) |
| Popis: | In this research, the variation of thermal conductivity with temperature of a limestone and its relationship with porosity is studied. Samples from Prada formation, a lower Cretaceous limestone from the Catalan Pyrenees (Spain), obtained from the Tres Ponts road tunnel were subjected to temperatures of 105, 300, and 600 °C and then cooled at a slow rate by air-cooling to laboratory temperature. Open porosity tests were determined before and after heating to evaluate the porosity increase and the micro-cracks growth. Complementarity, thermal conductivity was measured in the rock samples before and after the application of a thermal treatment by means of C-Therm TCi device, a Modified Transient Plane Source (MTPS). This is a non-invasive, quick, and precise method, when compared with other steady-state laboratory alternatives, widely used to directly determine thermal properties of rock samples. A clear decrease in the thermal conductivity of above 10% was observed for samples heated at 600 °C, probably due to a dramatic increase in porosity. The obtained results could be of great interest for the incorporation of the effect of temperature on rock in numerical models, to evaluate the potential impacts induced by eventual fires developed inside the Tres Ponts tunnel. This work was supported by the Department of Geological and Geotechnical Engineering, Universitat Politècnica de València. |
| Databáze: | OpenAIRE |
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