This book presents experimental work done to investigate the efficacy of different additives, viz., lime and Quarry Dust, in stabilizing the marine clay, thereby, improving the strength, swell characteristics of the marine clay. A systematic methodical process was followed, involving experimentation in the laboratory under controlled conditions. It was observed that 7.5% lime treatment as individually and with the combination of 25% Quarry Dust with marine clay has effectively improved the laboratory CBR value. It was noticed from the laboratory investigations of the cyclic plate load test results that, the load carrying capacity of the treated marine clay subgrade model flexible pavement has been increased by 254% at OMC and 225% at FSC when compared with untreated marine clay subgrade model flexible pavement.