It has also observed that rock dust powder contains relatively large percentages of K2O (3.15%), Na2O (3.01%) and MgO (4.48%). The presence of alkaline and alkaline earth oxides in rock dust composition act as fluxing agents helping the sintering process of the ceramic materials. Table 2 shows the Atterberg's limit of clay sample that is used in the experiment. The plasticity index (13.66) indicates low to medium ranges of plasticity of clay sample.