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Modelling of transport processes in concrete exposed to elevated temperatures – An alternative formulation for sorption isotherms

Lookup NU author(s): Dr Colin Davie

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Abstract

© 2018 Elsevier Ltd. There is a significant need to understand, analyse and assess moisture transport in cementitious materials exposed to elevated temperatures in order to confidently predict the behaviour and ultimately the development of damage in safety critical applications such as nuclear reactor vessels, structures exposed to fire and well bore grouts.In view of this need a rigorous and robust formulation to describe water retention curves (sorption isotherms) as a function of temperature based on the evolution of physical parameters is presented. The model formulation is successfully validated against independent sets of experimental data up to temperatures of 80 °C. It is then further validated under isothermal drying conditions and then high temperature conditions through the numerical reproduction of laboratory experiments following implementation in a fully coupled hygro-thermo-mechanical finite element model.The new formulation is found to work well under a variety of conditions in a variety of cementitious material types.


Publication metadata

Author(s): Davie CT, Pearce CJ, Kukla K, Bićanić N

Publication type: Article

Publication status: Published

Journal: Cement and Concrete Research

Year: 2018

Volume: 106

Pages: 144-154

Print publication date: 01/04/2018

Online publication date: 19/01/2018

Acceptance date: 11/01/2018

Date deposited: 16/03/2018

ISSN (print): 0008-8846

ISSN (electronic): 1873-3948

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.cemconres.2018.01.012

DOI: 10.1016/j.cemconres.2018.01.012


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