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Article Dans Une Revue Materials Science and Engineering: A Année : 2006

Water effect on internal friction of set plaster

Résumé

Set plaster is brittle when it is dry and becomes plastic with a drastic drop of mechanical properties in the presence of water. In this work, mechanical spectroscopy has been used to investigate this water effect. Internal friction was measured as a function of strain amplitude at different humidity conditions. A weak dependence is observed at low strain amplitude, followed by a steep linear rising above a threshold strain amplitude. Increasing the relative humidity increases the internal friction and lowers the threshold of the rising part. The results provide an experimental evidence of a relative sliding of gypsum crystals enhanced in the presence of water. A simple viscoelastoplastic rheological model is proposed to describe this effect.

Domaines

Matériaux
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Dates et versions

hal-00436174 , version 1 (17-01-2022)

Licence

Paternité - Pas d'utilisation commerciale

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Pascal Reynaud, Malika Saadaoui, Sylvain Meille, Gilbert Fantozzi. Water effect on internal friction of set plaster. Materials Science and Engineering: A, 2006, pp.500-503. ⟨10.1016/j.msea.2006.01.152⟩. ⟨hal-00436174⟩
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