Engineering Mechanics

International Conference

Proceedings Vol. 12 (2006)


ENGINEERING MECHANICS 2006

NATIONAL CONFERENCE WITH INTERNATIONAL PARTICIPATION
May 15 – 18, 2006, Svratka, Czech Republic
;
Editors: Jiří Náprstek and Cyril Fischer

Copyright © 2006 Institute of Theoretical and Applied Mechanics, Academy of Sciences of the Czech Republic, Prague

ISBN 80-86246-27-2 (printed, Extended Abstracts)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

list of papers scientific commitee

Management of hydratation heat evolution
R. Valenta, J. Šejnoha, M. Šejnoha, T. Krejčí
pages 402 - +7p., full text

In this contribution the influence of casting procedure in layers together with application of H-Krystal catalyst on water tightness and volume stability of concrete structures of considerable thickness is investigated. Proposed procedures are verified by both the numerical and physical experiments. Reaching the volume stability results in the significant reduction of crack evolution. The compact concrete therefore provides protection for reinforcement, and so these structures can also be used in an aggressive environment. The goal of this work is to propose a methodological approach ensuring the highest possible reduction of crack evolution and yielding watertight concretes. The main causes of crack evolution in an early stage of concrete are the hydratation heat and shrinkage. To reach the water tightness and the volume stability of concrete, suitable casting procedures such as casting in layers and an application of HKrystal in dilatation joints are proposed, which allows us to control the evolution of hydratation heat.


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All papers were reviewed by members of the scientific committee.


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