Skip to Main content Skip to Navigation
Theses

Influence of structural morphology on the mechanical properties of building materials : applications to gypsum and cement pastes

Julien Sanahuja
Abstract : Despite its widespread use, concrete is a genuinely complex material, exhibiting a multiscale and multiphysics nature. Gypsum also presents such a complexity, although in a somewhat less pronounced way. The main objective of this study is to evaluate the applicability of Eshelby-based homogenization of random media to investigate the mechanical behaviour of gypsum and cement pastes. We explore mechanical phenomena such as elasticity, as well as failure, damage and creep. Firstly, the stiffness and the elastic limit of gypsum are modelled and validated. A micro-to-macro damage model is also proposed to investigate the post-peak behaviour. Secondly, a simplified morphological model of cement paste is developed to estimate the stiffness. The elastic limit of c-s-h is also investigated. A preliminary model of creep of c-s-h and cement paste is proposed. Thirdly, we investigate the influence of interfacial phenomena on failure (having sandstones in mind) and creep of a porous polycrystal.
Document type :
Theses
Complete list of metadatas

Cited literature [132 references]  Display  Hide  Download

https://pastel.archives-ouvertes.fr/pastel-00004039
Contributor : Ecole Des Ponts Paristech <>
Submitted on : Friday, July 18, 2008 - 8:00:00 AM
Last modification on : Friday, July 18, 2008 - 8:00:00 AM
Long-term archiving on: : Friday, October 19, 2012 - 12:15:10 PM

Identifiers

  • HAL Id : pastel-00004039, version 1

Collections

Citation

Julien Sanahuja. Influence of structural morphology on the mechanical properties of building materials : applications to gypsum and cement pastes. Engineering Sciences [physics]. Ecole des Ponts ParisTech, 2008. English. ⟨pastel-00004039⟩

Share

Metrics

Record views

617

Files downloads

1237