A comparative study between ASTM C1567 and ASTM C227 to mitigate alkali-silica reaction

摘要

The primary objective of this study was to evaluate the two different widely adopted test methods such as american society for testing and materials (ASTM) C1567 accelerated mortar bar method and ASTM C227 mortar bar method to identify the alkali-silica reaction (ASR) of ferronickel slag fine aggregates. The ASR mitigation measure was assessed by the application of supplementary cementing material such as fly ash. During the experimental investigation visual inspection, mortar bar expansion and tensile strength measurements were evaluated. The test results point out that mortar bar method was unsuccessful to identify the ASR due to significant alkali leaching during the experiment. On the other hand, accelerated mortar bar method was successful to identify ASR and able to determine the safe dosage of fly ash to mitigate this deleterious expansion.