The MD replacement of lateritic soil reduces the fine
content and increases the abrasion resistance of the soil particles, hence the reduction in liquid limit,
plasticity index, LA abrasion and particle breakage. This physical property improvement leads to superior
mechanical properties (soaked CBR and swelling) with increasing MD replacement ratio as compared to
the soil alone. The proposed empirical equations for predicting soaked CBR and swelling of blends at
different MD replacement ratios and compaction energy levels are useful in the selection of the suitable
MD replacement to attain targeted mechanical property requirements. The physical and mechanical
properties of the 20% MD replacement blend were found to meet the requirement of local road authority
for engineering fill materials while the 50% MD replacement blend was at the borderline for a subbase
course material.