Compaction Guidelines for Fine-Grained Soils in Road Design

Resilient Modulus is a measure of soil stiffness under cyclic loading and is not related to poison n

Compaction guidelines recommend compacting all fill areas below 300 mm to 95% standard proctor density.

Mechanical stabilization of soil includes methods like blending, chemical stabilization, and geosynthetics.

In the compaction guidelines, for fine-grained soils, the top 300 mm should be re-compacted to 95% of standard proctor density.

For coarse-grained soils with plasticity index ≤ 6, the top 300 mm should be re-compacted to 100% of standard proctor density.

Mechanical stabilization through blending involves mixing other soils with the target soil to change its chemical properties.

Lime treatment of subgrade soils is generally recommended for hard, dry, sandy soils.

The objective of lime treatment of subgrade soils is to decrease the thickness of the pavement structure.

Mechanical stabilization techniques include compaction and chemical blending.

Adding hydrated lime to soil can decrease plasticity, improve compaction, and increase strength by enhancing attractive forces between clay particles.