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Réponse de matériaux à des contraintes thermo-hydriques obtenues par suivi climatique : étude de cas de la basilique Saint-Remi de Reims.

Abstract : Temperature and relative humidity are two parameters playing a key role in stone weathering. A non-invasive approach has been chosen to study the effect of those parameters on the materials of the Saint-Remi basilica in Reims (France). The environmental monitoring (temperature and relative humidity measurements) allowed to identify micro-climates on the monument and typical events: cloudy periods, sunny-, cold rainy-, warm rainy- and frost days. An experimental apparatus reproducing temperature and humidity variations of the typical events was designed to assess materials’ behaviors in realistic experimental conditions. Local strain and temperature measurements allowed to estimate thermo-hydric stress generated in the materials. The behaviors of two limestones – the Courville (original stone) and Savonnières (restoration stone) limestones – and a restoration mortar – the Lithomex.The Courville limestone showed high and localized stress compared to the Savonnières, suggesting better durability for the Savonnières. On the other hand, high stress is generated at the interface Lithomex-Savonnières hinting at better compatibility between the Lithomex mortar and the Courville limestone. In terms of Lithomex compatibility with the stones, a critical parameter would be the water penetration through the Lithomex layer. The realistic experimental conditions provide relevant information on possible weathering mechanisms on the basilica, adapted to this specific environment and closer to reality than other classical tests.
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https://hal.univ-reims.fr/tel-03494866
Contributor : Xavier Drothiere Connect in order to contact the contributor
Submitted on : Monday, December 20, 2021 - 9:29:36 AM
Last modification on : Tuesday, January 4, 2022 - 5:59:25 AM

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  • HAL Id : tel-03494866, version 1

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Emilie Huby. Réponse de matériaux à des contraintes thermo-hydriques obtenues par suivi climatique : étude de cas de la basilique Saint-Remi de Reims.. Sciences de la Terre. URCA - GEGENAA, 2021. Français. ⟨tel-03494866⟩

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