Multiscale hydro-thermo-chemo-mechanical coupling

Application to alkali-silica reaction

authored by: T. Wu, I. Temizer, P. Wriggers
Abstract: Alkali-Silica Reaction (ASR) is a complex chemical process that affects concrete structures and so far various mechanisms to account for the reaction at the material level have already been proposed. The present work adopts a simple mechanism, in which the reaction takes place at the micropores of concrete, with the aim of establishing a multiscale framework to analyze the ASR induced failure in the concrete. For this purpose, 3D micro-CT scans of hardened cement paste (HCP) and aggregates with a random distribution embedded in a homogenized cement paste matrix represent, respectively, the microscale and mesoscale of concrete. The analysis of the deterioration induced by ASR with the extent of the chemical reaction is initialized at the microscale of HCP. The temperature and the relative humidity influence the chemical extent. The correlation between the effective damage due to ASR and the chemical extent is obtained through a computational homogenization approach, enabling to build the bridge between microscale damage and macroscale failure. A 3D hydro-thermo-chemo-mechanical model based on a staggered method is developed at the mesoscale of concrete, which is able to reflect the deterioration at the microscale due to ASR.
Organisation(s): Institute of Continuum Mechanics
External Organisation(s): Bilkent University
Type: Article
Journal: Computational materials science
Volume: 84
Pages: 381-395
No. of pages: 15
ISSN: 0927-0256
Publication date: 11.01.2014
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Computer Science, General Chemistry, General Materials Science, Mechanics of Materials, General Physics and Astronomy, Computational Mathematics
Electronic version(s): https://doi.org/10.1016/j.commatsci.2013.12.029 (Access: Unknown)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{01443c47c8ad4f40acd3fcc38b5d5231,
title = "Multiscale hydro-thermo-chemo-mechanical coupling: Application to alkali-silica reaction",
abstract = "Alkali-Silica Reaction (ASR) is a complex chemical process that affects concrete structures and so far various mechanisms to account for the reaction at the material level have already been proposed. The present work adopts a simple mechanism, in which the reaction takes place at the micropores of concrete, with the aim of establishing a multiscale framework to analyze the ASR induced failure in the concrete. For this purpose, 3D micro-CT scans of hardened cement paste (HCP) and aggregates with a random distribution embedded in a homogenized cement paste matrix represent, respectively, the microscale and mesoscale of concrete. The analysis of the deterioration induced by ASR with the extent of the chemical reaction is initialized at the microscale of HCP. The temperature and the relative humidity influence the chemical extent. The correlation between the effective damage due to ASR and the chemical extent is obtained through a computational homogenization approach, enabling to build the bridge between microscale damage and macroscale failure. A 3D hydro-thermo-chemo-mechanical model based on a staggered method is developed at the mesoscale of concrete, which is able to reflect the deterioration at the microscale due to ASR.",
keywords = "Alkali-silica reaction, Cement paste, Concrete, Homogenization, Multiscale",
author = "T. Wu and I. Temizer and P. Wriggers",
year = "2014",
month = jan,
day = "11",
doi = "10.1016/j.commatsci.2013.12.029",
language = "English",
volume = "84",
pages = "381--395",
journal = "Computational materials science",
issn = "0927-0256",
publisher = "Elsevier",
}