Title: Experimental investigations to evaluate the alkali-carbonate reactivity and alkali-silica reactivity of aggregates
Authors: Mohammad Shahidul Islam
Addresses: School of Engineering, The University of British Columbia, Okanagan Campus, 1137 Alumni Avenue, Kelowna, BC V1V 1V7, Canada
Abstract: The objective of this paper was to evaluate the alkali-silica reactivity (ASR) and alkali-carbonate reactivity (ACR) of the 14 aggregate groups quarried from different locations. In order to serve the stated purpose, the investigated aggregate groups were tested in determining their alkali-silica reactivity using the ASTM C 1260 at the ages of 2, 4, and 8 weeks, and the modified ASTM C 1293 (prisms submerged in the 1N NaOH at 80°C) at the test durations of 4, 8 and 13 weeks. The aggregate prone to the alkali-carbonate reactivity was accessed using the ASTM C 1105 at the ages of 3, 6 and 12 months. The study revealed that the aggregates susceptible to alkali-carbonate reactivity were also shown to be reactive due to the alkali-silica reactivity.
Keywords: alkali-silica reaction; ASR; alkali-carbonate reaction; ACR; test durations; failure limits; aggregate mineralogy; aggregates; reactivity.
International Journal of Structural Engineering, 2015 Vol.6 No.4, pp.354 - 367
Received: 16 Sep 2014
Accepted: 06 Jan 2015
Published online: 14 Oct 2015 *