The surface course of flexible pavements is generally made of# in PSSSB Jr. Draftsman Official Paper Download PDF Attempt Online View all PSSSB Junior Draftsman Papers >
The surface course of flexible pavements is generally made of# in PSSSB Jr. Draftsman Official Paper Download PDF Attempt Online View all PSSSB Junior Draftsman Papers > Correct Answer Hot mix asphalt
Flexible pavement:
It is composed of a bituminous material surface course and underlying base and subbase courses.
The bituminous material is more often asphalt whose viscous nature allows significant plastic deformation.
Most asphalt surfaces are built on a gravel base, although some 'full depth' asphalt surfaces are built directly on the subgrade.
It transmits load to the subgrade through a combination of layers.
Flexible pavement distributes load over a relatively smaller area of the subgrade beneath.
The initial installation cost of a flexible pavement is quite low which is why this type of pavement is more commonly seen universally.
However, the flexible pavement requires maintenance and routine repairs every few years. In addition flexible pavement deteriorates rapidly; cracks and potholes are likely to appear due to poor drainage and heavy vehicular traffic.
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