− ASTM C 416 / 1997 ( Reapproved 2007 ) Standard Classification of Silica Refractory Brick . − ASTM C 1223 / 1992 ( Reapproved 2003 ) Standard Test Method for Testing of Glass Exudation from AZS Fusion – Cast Refractories . المراجع العلمية : − G. Ro