Material |
Specification |
Notes |
Permeable Pavers |
Surface open area: typically 5% to 15%; minimum thickness: 3 inches for vehicles; minimum compressive strength: 8,000 psi |
Concrete pavers conform to ASTM C936 and clay pavers C1272. Reservoir layer required to support the structural load. |
Pervious Concrete |
- Void content: 15% to 35 %
- Thickness: typically 5 to 8 inches
|
May not require a reservoir layer to support loads, but a layer is required for storage/infiltration. In no case should plain steel rebar or mesh be used in pervious concrete as this invites corrosion. |
Porous Asphalt |
- Void content: 16% to 20 %
- Thickness: minimum 2.5 inch surface
|
Reservoir layer contributes to structural load support. |