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Theses

Étude des propriétés hydriques et des mécanismes
d'altération de pierres calcaires à forte porosité.

Abstract : The main objective of this work is the study, by a multi-scales approach, of the behaviour of building stones
of monuments with respect to deterioration. To this end, two building limestones, of which a few main
characteristics are very close (total porosity, mechanical resistance), are studied: white tuffeau, which is
largely employed in constructions of castles of the Loire Valley, and Sébastopol stone, used in Paris area.
First of all, an observation of the various types of in-situ weathering and a case study on a naturally
deteriorated stone were carried out in order to note the various morphologies of deterioration and to identify
water like the agent vector of the phenomena of deterioration.
In the second time, a multi-scales characterization was carried out in order to observe the fresh stones from
the point of view of their mineralogical constitution, the morphology of their porous media and especially of
their water properties (water retention capacity, properties of transfer of water in liquid form and vapour
form) but also of their hydro-mechanical behaviour.
The last part is devoted to the durability of the building stones with the study of compatibility between
stones used in restoration. Indeed, behaviours of the stones during an artificial ageing test are compared.
The different reaction of the two stones in relation with this same process of deterioration is to be linked to
their very dissimilar water properties. At last, a formulation and a hydro-mechanical characterization of
joints of mortar are proposed in order to determine the criteria of compatibility between the mortar and the
stones.
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Contributor : Nathalie Pothier <>
Submitted on : Monday, January 22, 2007 - 1:39:36 PM
Last modification on : Thursday, March 5, 2020 - 6:48:55 PM
Long-term archiving on: : Wednesday, April 7, 2010 - 2:25:58 AM

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  • HAL Id : tel-00125704, version 1

Citation

Kévin Beck. Étude des propriétés hydriques et des mécanismes
d'altération de pierres calcaires à forte porosité.. Minéralogie. Université d'Orléans, 2006. Français. ⟨tel-00125704⟩

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