2.2.3 Unconfined compression tests
Unconfined compressive strength tests on compacted specimens were conducted according to ASTM D2166 (2000) on the chosen soil sample with various percentage of hydrated lime. Soil samples were cured in plastic bag to prevent moisture change. To prepare the samples for the unconfined compression test, the samples were remolded according to the field dry density derived from the compaction test (1.56 g/cm3) and the natural moisture content (18.682%). For each type of mixtures, the unconfined compressive strength value was obtained as the average of two trials of unconfined compression tests.