Název:
Distribution of hydration products in the microstructure of cement pastes
Autoři:
Hlobil, Michal Typ dokumentu: Příspěvky z konference Konference/Akce: International Conference on Local Mechanical Properties /14./, Prague (CZ), 20191106
Rok:
2020
Jazyk:
eng
Abstrakt: This case study focuses on the quantification of the amorphous hydrate distribution in the microstructure of hardened cement paste. Microtomographic scans of the hardenend cement paste were thresholded based on histogram image analysis combined with microstructural composition obtained from CEMHYD3D hydration model, to separate unhydrated cement grains, crystalline and amorphous hydrates, and capillary pores. The observed spatial distribution of the amorphous hydrate exhibited a strong spatial gradient as the amorphous gel tended to concentrate around dissolving cement grains rather than precipitate uniformly in the available space. A comparative numerical study was carried out to highlight the effect of the spatially (non)uniform hydrate distribution on the compressive strength of the hardened cement paste.
Klíčová slova:
cement paste; hydration products; microstructure; modelling Číslo projektu: GJ19-25163Y (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: Acta Polytechnica CTU Proceedings, ISBN 978-80-01-06735-2, ISSN 2336-5382 Poznámka: Související webová stránka: https://doi.org/10.14311/APP.2020.27.0084
Instituce: Ústav teoretické a aplikované mechaniky AV ČR
(web)
Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0300572