Computational Modeling of Concrete Degradation Due to Alkali Silica Reaction

Jithender J. Timothy, Minh N. Nguyen, Günther Meschke

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

This paper presents a computational multi-level model for the description of alkali and moisture transport in concrete structures coupled to a macroscopic ASR induced phase-field damage model. Concrete is modeled as a heterogeneous material consisting of a partially saturated pore space with diffusively distributed microcracks and the solid skeleton (cement paste and potentially reactive and inert aggregates). The influence of the topology of the pore space and the presence of oriented microcracks on ion diffusion and moisture transport is taken into account through a novel continuum micromechanics homogenization model. The transport model is connected to a phenomenological reaction kinetics model to account for the ASR induced volume expansion of the affected aggregates. At the macroscopic scale, crack propagation and effects of induced topological changes on the fluid and ion transport are taken into account using a phase-field model.

Original languageEnglish
Title of host publicationCONCREEP 2015
Subtitle of host publicationMechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures - Proceedings of the 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures
EditorsJohann Kollegger, Christian Hellmich, Bernhard Pichler
PublisherAmerican Society of Civil Engineers (ASCE)
Pages194-201
Number of pages8
ISBN (Electronic)9780784479346
DOIs
StatePublished - 2015
Externally publishedYes
Event10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures, CONCREEP 2015 - Vienna, Austria
Duration: 21 Sep 201523 Sep 2015

Publication series

NameCONCREEP 2015: Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures - Proceedings of the 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures

Conference

Conference10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures, CONCREEP 2015
Country/TerritoryAustria
CityVienna
Period21/09/1523/09/15

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