Environmental Engineering Reference
In-Depth Information
Choker course: AASHTO
No.57
sufficient to fill large
aggregate space
Pervious paving surface course
Clean uniformly graded
coarse aggregate,
AASHTO No. 3
Bed depth varies,
generally 12” - 36”
Nonwoven geotextile
on bed bottom and sides
Uncompacted
subgrade
Figure 7-1
Porous pavement section.
Figure 7-2
Porous pavement in traffic application, Portland, Oregon.
• Pervious paver blocks
• Reinforced turf and gravel
• “Clear” binder pavements
The depth of pavement surface varies, but the subsurface design should be
the same, with the storage and infiltration bed depth a function of the soil
infiltration rate and the inflow surface volume. At present, the longest record of
construction experience is available with the porous AC pavement, in use since
the mid-1970s [3, 4].
Search WWH ::
Custom Search