CUED Publications database

Influence of visco-elasticity on the stress development induced by alkali-silica reaction

Giorla, AB and Scrivener, KL and Dunant, CF (2015) Influence of visco-elasticity on the stress development induced by alkali-silica reaction. Cement and Concrete Research, 70. pp. 1-8. ISSN 0008-8846

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Abstract

© 2014 Elsevier Ltd. All rights reserved. The alkali-silica reaction causes long-termdegradation in the microstructure of affected concrete as well as macroscopic expansion. In this paper, a micro-mechanical model based upon an explicit representation of the microstructure has been used to simulate the role of creep on the expansion and damage induced by the reaction. The model accounts for the coupling between damage propagation and stress relaxation in the cement paste. This study indicates that the influence of the visco-elastic nature of the material on the overall expansion is within the experimental scatter. However, it is shown that creep can explain the comparatively low amount of damage in the cement paste as observed experimentally. Creep also increases the amount of damage in the aggregates when the rate of reaction increases. Overall, the results presented in this paper indicate that accelerated experiments may not be representative of the degradation in the field at equivalent degrees of reaction.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div D > Structures
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:00
Last Modified: 21 Nov 2017 03:46
DOI: