Pavement Aashto: lean_concrete_base to natural_gravel_subbase
AASHTO pavement design material properties including layer coefficients, drainage coefficients, and modulus values for flexible and rigid pavement design
| material id | description | drainage coefficient max (dimensionless) | drainage coefficient min (dimensionless) | layer coefficient | layer type | material name | max thickness in | min thickness in (in) | notes | typical modulus MPa (MPa) | typical modulus psi (psi) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| lean_concrete_base | Lean concrete base (econocrete) | 1.4 | 0.4 | 0.2 | base | Lean Concrete Base | 8 | 4 | a2=0.20; compressive strength 300-750 psi | 3,450 | 500,000 |
| lime_treated_base | Lime-stabilized aggregate base | 1.4 | 0.4 | 0.11 | base | Lime-Treated Base | 12 | 6 | a2=0.11; effective for high-plasticity clay soils | 276 | 40,000 |
| lime_treated_subbase | Lime-stabilized subbase layer | 1.4 | 0.4 | 0.14 | subbase | Lime-Treated Subbase | 12 | 6 | a3=0.14; effective for high-PI clay subgrades | 172 | 25,000 |
| natural_gravel_subbase | Natural gravel subbase (CBR >= 15) | 1.4 | 0.4 | 0.09 | subbase | Natural Gravel Subbase | 12 | 4 | a3=0.09; natural gravel with moderate fines | 83 | 12,000 |
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