Abstract: When the moisture content near the optimum content, the required number of compaction pass of red mud cakes using SD22S compactor reaching the 90% and 95% degrees of compaction is studied. The shear strength indices of the compacted red mud cakes are also tested. The testing results show that, when the loose lift thickness is 0.5 m, the required number of passes is 4 and 6, respectively. The number of compaction passes becomes 6 and 8, respectively when the loose lift thickness is 1.0 m.

Key words: Red Mud Cakes, Compaction, Degree of Compaction, Number of Compaction Passes, Shear Strength Indices