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Structure and Small Angle Scattering of Polydisperse Granular Porous Materials: A Fingerprint for Cement Paste
Small-angle X-ray scattering (SAXS) and small-angle neutron scattering (SANS) are widespread experimental tools for the investigation of the microstructure of random heterogeneous materials such as granular porous media. Such experiments allow operating on macroscopic samples and provide quantitative 3D information at length-scales between 1 and 500 nm while keeping sample preparation to a minimum. SANS or SAXS can also be considered as fingerprints of the morphology, allowing to test and to discard some microstructure hypotheses. In this presentation, an analysis of various reconstructed, polydisperse, granular, porous media is proposed. The evolution of the computed small angle scattering with the level and the nature of the polydispersity (ranging from monodisperse to very large polydispersity) are presented. Finally, our results are critically analyzed and reviewed in the perspective of hardened cement pastes.
Structure and Small Angle Scattering of Polydisperse Granular Porous Materials: A Fingerprint for Cement Paste
Small-angle X-ray scattering (SAXS) and small-angle neutron scattering (SANS) are widespread experimental tools for the investigation of the microstructure of random heterogeneous materials such as granular porous media. Such experiments allow operating on macroscopic samples and provide quantitative 3D information at length-scales between 1 and 500 nm while keeping sample preparation to a minimum. SANS or SAXS can also be considered as fingerprints of the morphology, allowing to test and to discard some microstructure hypotheses. In this presentation, an analysis of various reconstructed, polydisperse, granular, porous media is proposed. The evolution of the computed small angle scattering with the level and the nature of the polydispersity (ranging from monodisperse to very large polydispersity) are presented. Finally, our results are critically analyzed and reviewed in the perspective of hardened cement pastes.
Structure and Small Angle Scattering of Polydisperse Granular Porous Materials: A Fingerprint for Cement Paste
Levitz, P. (author) / Brisard, S. (author)
Ninth International Conference on Creep, Shrinkage, and Durability Mechanics (CONCREEP-9) ; 2013 ; Cambridge, Massachusetts, United States
2013-09-23
Conference paper
Electronic Resource
English
Mechanical properties , Creep , Concrete , Cement , Durability , Porous media , Shrinkage
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