A Study on Wall Grouting Material of Desulphurization Building Gypsum

The wall grouting material was successfully prepared from desulphurization building gypsum modified by adding fly ash,activator,water reducer and retarder as admixture.The results show that the gypsum wall grouting material with well performances of compressive strength of 8.39MPa,flexural strength of 3.70MPa,softening coefficient of 0.75,initial setting time of 50min and final setting time of 57min was prepared when the fluidity was over 80 mm.