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Theses

Le carnet de santé d'un monument : Application au château de Chambord

Abstract : This thesis is dedicated to the establishment of a methodology to study the built cultural heritage, applied to the castle of Chambord. It consists in realizing the health record of the monument, and completing it by an experimental sequence in laboratory, in order to provide a diagnosis of the state of degradation.Historical archives about the castle were gathered and analysed to obtain mappings of dating and nature of stone. By mean of in situ observations, a mapping of degradation has been added. A synthesis of the information concerning the past and the present of the monument allowed establishing a list of the main factors associated to degradations and to a chronology of development of these degradations, so as to estimate their kinetics.Spalling, which is the most damaging and complex usual degradation, has been chosen as case of study for the diagnosis of degradation. The physic-chemical characterisations made on in situ coring lead to systematically found gypsum in spalling’s cracks. Various artificial ageing tests have been performed to enlighten the role of gypsum, its transport mode, and its origin. Atmospheric pollution including gaseous SO2 reproduces well the distribution of gypsum observed in spalling at Chambord. A global mechanism taking into account this phenomenon has been proposed to clarify the development of this degradation.
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Sarah Janvier. Le carnet de santé d'un monument : Application au château de Chambord. Autre. Université d'Orléans, 2012. Français. ⟨NNT : 2012ORLE2070⟩. ⟨tel-00843649⟩

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