Pavement Aashto: drainage_poor to gravel_base
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) | layer type | material name | max thickness in | min thickness in (in) | notes |
|---|---|---|---|---|---|---|---|
| drainage_poor | Poor drainage; extended periods of saturation | 0.6 | drainage | Drainage Quality - Poor | Water removed within 1 month | 0.8 | AASHTO Guide for Design of Pavement Structures (1993) |
| drainage_very_poor | Very poor drainage; water trapped in pavement structure | 0.4 | drainage | Drainage Quality - Very Poor | Water does not drain | 0.6 | AASHTO Guide for Design of Pavement Structures (1993) |
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