Abstract:
The engineering properties of stabilized soils are varied for many factors
such as soil heterogeneity, soil composition, soil structures, geological conditions, and
the difference of interaction between the soil and stabilizers. These variations required
the consideration of stabilization at a specific site option. These natural materials,
therefore, critically influence the success of a construction project. The reason for this
study was to quantify the improvements achieved in the engineering properties of
expansive soils due to lime stabilization. This study considered quantitative experimental
to determine lime-stabilized expansive clay soil's engineering properties using a
laboratory program. Laboratory tests were to determine Atterberg Limits, compaction
test, free swell test, California Bearing Ratio (CBR), and pH values of the mixtures. The
collected soil samples were stabilized using 2, 4, 5, 6, and 8% of hydrated lime by weight.
The optimum lime for the stabilization of expansive soils was 5% using hydrated lime.
As percentages of hydrated lime increased, there were improvements in stabilized
subgrade soil properties. The more significant upgrade in engineering properties was
observed on California Bearing Ratio (CBR), and lower improvements were on maximum
dry density. The result indicated that the stabilizer is very effective in improving strength
parameters than index parameters. The hydrated lime stabilized soils under the optimum
ratio fulfill the standard requirements as subgrade soils.
