Early stage microstructure development of cement paste modified by crystalline admixture

0474232 - ÚTAM 2018 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Hrbek, V. - Petráňová, Veronika - Němeček, J.
Early stage microstructure development of cement paste modified by crystalline admixture.
Key Engineering Materials. Vol. 722. Zürich: Trans Tech Publications, 2017 - (Reiterman, P.), s. 92-99. ISBN 978-3-0357-1079-3. ISSN 1013-9826.
[International Conference on Special Concrete and Composite /13./. Skalsky Dvur (CZ), 13.10.2016-14.10.2016]
Institucionální podpora: RVO:68378297
Klíčová slova: cement * crystalline admixture * microstructure * nanoindentation * phase * SEM
Obor OECD: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
https://www.scientific.net/KEM.722.92

This paper deals with the effect of crystalline admixture (CA) on the microstructure of the cementitious composite in first four weeks after the production. Previous investigation was performed on reference specimens consisting of pure cement. Samples of pure CA and cement modified by 1% of CA with the same w/c ratio were examined and compared in this paper. By investigation of these materials on the micro-scale, it is possible to identify the development of the microstructure of each and determine the impact of the modification. For this purpose, backscattered electrons microscopy (BSE) with energy-dispersive X-ray spectroscopy (EDX) was used for phase analysis as well as instrumental nano-indentation to obtain micro-mechanical properties. Presented results show the evolution of mechanical properties and microstructure in time and the impact of the crystalline admixture on modified cement.
Trvalý link: http://hdl.handle.net/11104/0271346