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|Title:||Expedient evaluation of alkali-silica reaction susceptibility of aggregates : characterizing existing and exploratory test methods|
|Authors:||University of Puerto Rico (Mayagüez Campus). Department of Civil Engineering.|
Air Force Civil Engineering Center (U.S.)
Moser, Robert D.
Reed-Gore, Erin R.
Ramsey, Monica A.
Weiss, Charles Arthur, 1961-
Rutland, Craig A.
Tingle, Jeb S.
|Publisher:||Geotechnical and Structures Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||ERDC/GSL TR ; 14-26.|
Abstract: This report presents the results of research on test methods to evaluate the susceptibility of aggregates to deterioration by alkali-silica reaction (ASR). The research objective was to identify the benefits and caveats of ultra-accelerated ASR testing methods that are needed to support contingency concrete construction operations. The study investigated the effects of test method variables, e.g., temperature and exposure solution chemistry, on damage measured as expansion using the accelerated mortar bar test (ASTM C1260) and microstructure using optical and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy. These measurements evidenced changes in the damage state including ASR gel composition and microcrack morphology as exposure conditions changed. Exploratory test methods that may be used to further accelerate evaluations of ASR susceptibility were also studied including modifications to the quick chemical test (ASTM C289) and autoclaving techniques. Comparisons between test methods using aggregates with varying degrees of reactivity allowed for correlations between ultra-accelerated test methods and accepted ASTM methods along with the historical performance of the aggregate. Based on the results of the study, proposed additions to the overall framework for aggregate evaluation were provided that considers the contingency of the construction operation. NOTE: This file is very large. Allow your browser several minutes to download the file.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|
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|ERDC-GSL-TR-14-26.pdf||42 MB||Adobe PDF|