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

摘要

Test the alkali-silica reactivity of slate aggregate in Guizhou using mortar-bar method in JTG E42-2005[1] of China and accelerated mortar-bar method in TB/T2922.5-2002[2] 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.