Abstract
While alkali-silica reactivity (ASR) has been identified in a number of highway concrete structures, there is limited data available on the occurrence of ASR in airfield pavements. This paper describes a study conducted to develop a protocol for ASR distress rating analysis in airfields. Both field and lab tests were carried out, and the effectiveness of field detection kits was assessed. Field inspection of 2 U.S. airports with known pavement cracking was followed by collection of cores from strategic locations for lab study, which included microstructural identification of ASR gel and reactive aggregates, characterization of distress features, and damage estimation. As a result, a rating scheme was developed for airport pavements.
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