Influence of altered basalt on the burnability of portland cement clinker

Synthesis of porthand cement clinker from cement raw mixes containing altered basalt was studied. The clay of the raw mix of portland cement was substituted by basalt in ratios 0, 15, 30, 45 and 60 wt.%. The ingredients of the mixes were intimately homogenized, mixed, moulded into a compact mass and fired at 1200, 1250, 1300, 1350 and 1375degreesC for two hours soaking time. The burnability of each raw mix was investigated by the determination of insoluble residue, free lime contents and the phase composition of the fired products. The results show that the clinker formation was completed at 1300degreesC in the presence of 30-60 wt.% basalt.