Assessment Gravel Aggregate Reactivity With Alkalis In Relation To Methods Of Test

Alkali-aggregate reactivity (AAR) is one of the major causes of damage in concrete. Potential susceptibility of aggregates to this reaction can be determined using several methods. This study compares gravel alkali reactivity results obtained from different tests conducted on coarse aggregates with...

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Bibliographic Details
Published in:Archives of civil engineering 2014-12, Vol.60 (4), p.441-452
Main Authors: Owsiak, Z., Czapik, P., Zapała-Sławeta, J.
Format: Article
Language:English
Subjects:
aggregate
alkali-silica reaction
mortar
petrography
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Summary:Alkali-aggregate reactivity (AAR) is one of the major causes of damage in concrete. Potential susceptibility of aggregates to this reaction can be determined using several methods. This study compares gravel alkali reactivity results obtained from different tests conducted on coarse aggregates with complex petrography. The potential for the reactivity in the aggregates was revealed in the chemical test using treatment with sodium hydroxide. Optical microscopy, scanning electron microscopy and X-ray diffraction were used to identify the reactive constituents. The expansion measured in the mortar bars test confirmed that the aggregate was potentially capable of alkali silica reactivity with consequent deleterious effect on concrete.
ISSN:1230-2945
2300-3103
1230-2945
DOI:10.2478/ace-2014-0030