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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Multiaxial Expansion-Stress Relationship for Alkali Silica Reaction-Affected Concrete
Author(s): B. P. Gautam, D. K. Panesar, S. A. Sheikh, and F. J. Vecchio
Publication: Materials Journal
Appears on pages(s): 171-182
Keywords: alkali-silica reaction; expansion-stress relationship; maximum possible axial expansion; multiaxial stress; uncoupled axial expansion
Abstract:Many concrete structures around the world are experiencing expansion of concrete due to alkali-silica reaction (ASR). ASR expansion is reduced in the direction of compressive stress and is transferred to the unstressed directions. However, the relationship between ASR expansion and a multiaxial stress state in concrete, which is often the case in concrete structures, is inadequately understood. This paper presents a relationship between ASR expansion and the stress state of concrete based on experimentally determined triaxial expansions of unstressed and uniaxially, biaxially, and triaxially stressed concrete cube specimens. The expansion-stress relationship is not coupled with reaction kinetics and is isolated from the effect of creep and shrinkage by subtracting the deformations measured on non-reactive control specimens. The proposed relationship was implemented in a finite element program to predict the measured expansion values on concrete cube specimens. The predicted expansions are in reasonable agreement with the measured expansions.
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