A. Mainly contains quartz B. Is not stable at high temperature C. Transforms to other allotropic forms i.e. tridymite and cristobalite involving very high VolUme changes
A. Less shrinkage in heating, decreased apparent porosity & increased specific gravity B. High strength & thermal spalling resistance C. Less addition of water to get a workable plasticity & lesser time required for drying the raw RefRactories and hence increased rate of production
