Abstract:
As the cement content is one of the parameters that control alkali–silica reaction
(ASR), this study examined its influence on the expansion of glass mortars. The
mortars had volumetric ratio of 1:4 (cement: aggregate) and various aggregate
compositions, obtained using replacement ratios of natural sand with waste glass, of
0, 20, 50 and 100%. A volumetric ratio 1:4 was chosen because it is a current
composition for cementitious coating mortars. In fact, mortar mixes with increased
cement content can lead to erroneous conclusions for in situ mixtures with reactive
aggregates. It is concluded that it is feasible to produce glass mortars without deleterious
ASR expansion depending on the amount of cement used. For normal cement/
aggregate ratios for coating mortars (1:4, in volume), a CEM II/B-L 32.5 N mortar
with glass incorporation has a low ASR risk.