Folgueras et al. [8] used a mixture of
different proportions of blast furnace slag and fly ash to
produce glass of the system SiO2–MgO–CaO–AI2O3–R
(R¼Fe2O3, MnO2, TiO2
In their study, the glass–ceramic
was characterized, with regard to behavior during sintering and
crystallization, by determining bulk density and the arising
crystalline phases