The influence of fly ash form on extrusion process of high content fly ash(over70%)fired brick has been studied.

The firing process for fly ash sintered brick with high additives has been systematically studied through tests of XRD, TG-DTA, SEM and physical mechanical properties for material.

The developed sintered brick made from gangue and fly ash as industrial wastes as well as weathered shale as main raw materials has obviously social and economic benefits.