Figure 16-1.Petroleum asphalt flow chart.
Figure 16-2.-Liquid asphaltic products.
overloading either the strength of the subgrade
internal strength of the pavement itself.
Figure 16-3 shows the wheel load (W)
transmitted to the pavement surface through the
an approximately uniform vertical pressure (P405). The
pavement then spreads the wheel load to the foundation,
so the maximum pressure on the foundation is only
P415. By proper selection of pavement materials and
with adequate pavement thickness, P415 will be small
enough to be easily supported by the subgrade.
ASPHALT PAVEMENT STRUCTURE
Asphalt pavement is a general term applied to any
pavement that has a surface, constructed with asphalt
(fig. 16-4). Normally, it consists of a surface course
(layer) of mineral aggregate, coated and cemented with