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TRC2401: Evaluation of Alkali-Silica Reaction (ASR) Potential for Aggregate Sources in Arkansas

Project Details
STATE

AR

SOURCE

RIP

START DATE

01/01/24

END DATE

12/31/25

RESEARCHERS

Elia, Hala; Rice, Lakisha

SPONSORS

Federal Highway Administration; Arkansas Department of Transportation

KEYWORDS

Admixtures, Aggregates, Aggregates by source, Alkali silica reactions, Mix design

LINKS

Project Page

Project description

New test methods have been developed to determine the susceptibility of aggregates to alkali-silica reactions (ASR) and the alkali threshold of aggregate combinations. This project will examine the ASR susceptibility of aggregates, determine the alkali threshold of common aggregate combinations, and develop a mix design analysis tool to evaluate the ASR susceptibility of concrete mix designs. Samples of every aggregate approved for concrete production on the Qualified Products List (QPL) will be collected and tested using the Turner-Fairbank Highway Research Center ASR Test (T-FAST) method. T-FAST results will be utilized to select common aggregate combinations for Alkali Threshold Test (ATT) testing. A program will be written to analyze the alkalinity load of concrete mix designs and compare it to the Alkalinity threshold of aggregate combinations.
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