An Improved Test Method for the Detection on Alkali-Silica Reactivity of Aggregate

Abstract:

Test the alkali-silica reactivity of slate aggregate in Guizhou using mortar-bar method in JTG E42-2005of China and accelerated mortar-bar method in TB/T2922.5-2002 of China. The results show that the six months expansion is 0.11% with mortar-bar method, the aggregate has low alkali activity. The 14-days expansion exceeds 0.30% with accelerated mortar-bar method, according to the TB10005-2010, the aggregate has high alkali reactivity. Obviously, the accelerated mortar-bar method is safer than the mortar-bar method, but the test parameters and test conditions of accelerated mortar-bar method have some differences with the aggregate physical environments. According to the accelerated mortar bar method, the thesis proposes an improved test method for evaluating the alkali-silica reactivity of slate aggregate.

• Periodical: Advanced Materials Research (Volumes 671-674)
• Pages: 1715-1720
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.671-674.1715
• Online since: March 2013
• Authors: Jing Wang, Gu Hua Li, Jun Peng Zhang, Jun Jie Zhou, Feng Ming Sun, Xian Xiao Peng
• Keywords: Accelerated Mortar-Bar Method, Alkali Silica Reaction (ASR), Improved Test Method, Mortar-Bar Method

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