ANISOTROPIC EXPANSION OF ASR AFFECTED CONCRETE PRISM SPECIMENS
Author(s): Gautam, B. P. and Panesar, D. K.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
Publication year: 2015
Total Pages: 8
Abstract: Alkali aggregate reaction (AAR), the predominant type of which is alkali silica reaction (ASR), is a major deterioration problem in some concrete structures. Expansion is a common manifestation of ASR. However, the expansion behaviour has been reported to be influenced by the direction of casting of concrete. The scope of this paper is to present the expansions of reactive concrete prisms in the longitudinal direction (perpendicular to the casting direction) and the two transverse directions (one parallel to casting direction and the other perpendicular to the casting direction). Although the results revealed that the transverse expansion measurements were greater than the longitudinal expansion, no influence of the casting direction on the transverse expansion measurements was observed. In fact, the transverse expansions in both directions were identical indicating isotropic ASR expansion irrespective of the casting direction. The difference in the longitudinal and transverse expansions is attributed to the aspect ratio of the specimen and is supported with basic theoretical analysis.
Online publication: 2015
Publication Type: full_text
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