Influence de l'eau sur le comportement de la craie

Abstract : The paper presents the first results on the mechanical behaviour of two chalks from underground quarries in the Paris Basin depending on the relative humidity of air. The influence of water on the short term was demonstrated from uniaxial compression testings conducted on unsaturated samples for several saturation degrees (corresponding to relative humidity of air from 36.5% to 98%). It has been established that unconfined compressive strength decreased inversely with the degree of saturation. The effect of water on the long term has also been studied. Ageing of chalk seems to be related to water-chalk chemical interactions. Variability of data put aside, It has been stated that physical and mechanical properties evolve considering the range in the pillar: the densities and compressive strength of chalk seems to increase from the pillar centre to the edge.
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Noémie Lafrance, Mountaka Souley, Christophe Auvray, Vincent Labiouse. Influence de l'eau sur le comportement de la craie. 7. Journées Nationales de Géotechnique et de Géologie de l'ingénieur (JNGG 2014) "Observer, modéliser, décider", Jul 2014, Beauvais, France. ⟨ineris-01863826⟩

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