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Monitoring of kinetics of Pozzolanic reaction
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SYSNO ASEP 0470777 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Monitoring of kinetics of Pozzolanic reaction Author(s) Čáchová, M. (CZ)
Scheinherrová, L. (CZ)
Kobera, Libor (UMCH-V) RID, ORCID
Urbanová, Martina (UMCH-V) RID, ORCID
Brus, Jiří (UMCH-V) RID, ORCID
Keppert, M. (CZ)Source Title Key Engineering Materials. Vol. 722. - Pfaffikon : Trans Tech Publications Ltd, 2017 / Reiterman P. - ISSN 1013-9826 - ISBN 978-303571079-3 Pages s. 126-131 Number of pages 6 s. Publication form Print - P Action International Conference on Special Concrete and Composite /13./ Event date 13.10.2016 - 14.10.2016 VEvent location Skalsky Dvur Country CZ - Czech Republic Event type WRD Language eng - English Country CH - Switzerland Keywords Pozzolanic reaction ; chemical kinetics ; reaction mechanism Subject RIV JN - Civil Engineering OECD category Civil engineering R&D Projects GA16-13778S GA ČR - Czech Science Foundation (CSF) Institutional support UMCH-V - RVO:61389013 EID SCOPUS 85009760524 DOI 10.4028/www.scientific.net/KEM.722.126 Annotation The pozzolanic additions are widely used as concrete component for numerous technical, economic and environmental reasons. Obviously the hydration process in a pozzolana containing system differs from hydration of Ordinary Portland Cement (OPC) what is indicated macroscopically by slower increase of strength and lower hydration heat. This paper aims to study pozzolanic reaction from perspective of chemical kinetics. From this point of view pozzolanic reaction and carbonation are two parallel reactions which are competing for portlandite (Ca(OH)2). The rate of each of these two reactions is characterized by rate constant and order of reaction. The system under study was 1:1 mixture lime – ceramic powder. The course of reaction was primarily studied by thermogravimetry which results were further subjected to kinetic analysis. MAS NMR spectroscopy was used for study of structural changes taking place in material in the course of pozzolanic reaction. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2018
Number of the records: 1