Flexible Pavement
Flexible pavement will transmit wheel load stresses to the lower layers by grain - to -grain transfer through the points of contact in the granular structure. The wheel load acting on the pavement will be distributed to a wear area, and the stress decreases with the depth. Taking advantage of this stress distribution characteristics the lower layers will experience lesser Magnitude of stress and less quality material can be used. Flexible pavements ate constructed using bituminous materials.
Types of Flexible pavement
- Conventional layered Flexible pavement
- Full depth asphalt pavement
- Contained rock asphalt mat (CRAM )
1. Flexible pavement are layered systems with high quality expensive materials are placed in the top where stresses are high, and low - quality cheap materials are placed in lower layers.
2. Full depth asphalt pavement are constructed by placing bituminous layers directly on the soil subgrade .
3. Contained rock asphalt mats are constructed by placing dense/open graded aggregate layers in between two asphalt layers.