CONCRETE CASTING AND LIFETIME CONDITIONS IMPACT ON HIGH TEMPERATURE RESISTANCE

Author(s): Giuseppe Sciumè (1), Stefano Dal Pont (2), Dorjan Dauti (2)
Paper category: Proceedings
Book title: SynerCrete’18 International Conference on Interdisciplinary Approaches for Cement-based Materials and Structural Concrete
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN:978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year:
Pages: 555 - 560
Total Pages: 6
Language : English

Abstract: In this paper the impact of early age and service-life conditions on high temperature behaviour is analysed and shown for a 60-cm heated wall. Numerical experiments are performed using a porous media model, coupling dependencies of material parameters on hydration advancement degree. Concrete hydration at early age and dehydration/degradation due to high temperature exposure are here treated by means of an original unified approach. The mathematical model is based on general conservation equations of mass, energy and linear momentum. The explicit introduction of the stoichiometric model of Powers allows deriving some of the needed closure relationship. A new constitutive model is also proposed for the desorption isotherms.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00