| Abstrakt: |
Abstract: Phase compositions, microstructures and properties of four lightweight mullite-silica rich glass aggregates with high strength were investigated by X-ray diffractometry (XRD), scanning electron microscopy (SEM), and FactSage6.2 software. It was found that the lightweight aggregates with higher Al₂O₃ content had higher mullite content, porosity and larger mullite crystallites, but lower content and viscosity of melt at elevated temperature. Most of Fe₂O₃ and TiO₂ were incorporated in mullite and most of K₂O and Na₂O were in glass to reduce viscosity of melt at elevated temperature. |
