The chemical durability of SrO–MgO–ZrO2–SiO2 glasses in strongly alkaline environments

A large region of glass formation was found in the system SrO–MgO–ZrO2–SiO2 and some properties have already been reported. Detailed studies have shown that glasses with only 40 wt% silica unusually durable in 1 M NaOH and also in model cement extract solutions. Glasses with higher silica contents are more easily attacked; zirconia and magnesia are the constituents giving the best durability. These results suggest that these glasses could be of interest for reinforcement of cement and concrete.