What are the differences and functions of the three layers of asphalt pavement?
December 9, 2022

Asphalt pavement is divided into: permeable layer, sticky layer, sealing layer.


Penetration layer: It is a thin layer formed by pouring emulsified asphalt, coal tar pitch or liquid asphalt on the base layer, which penetrates into the surface of the base layer, and is used for the interlayer treatment between the lower layer and the base layer; the function is to make the asphalt surface layer and the base layer The non-bituminous material base is well bonded;
Adhesive layer: refers to the structural layer that acts as a bond between the pavement structures. In order to strengthen the bonding between the asphalt layer of the pavement and the asphalt layer, cement concrete panel, and asphalt-stabilized gravel base, the thin asphalt layer is sprinkled; Yes: Make the upper and lower layers of asphalt structure, or the asphalt structure layer and the structure, completely bonded into a whole;
Sealing layer: It is to close the surface gap and prevent moisture from intruding into the surface layer and the base layer. The thin layer of asphalt mixture paved on the surface layer is called the upper seal layer, and the lower layer is called the lower seal layer. The function is: upper The sealing layer is laid on the asphalt concrete surface to seal the water and resist the wear of the wheels.
The difference between the three is: the sealing layer is the surface structure of the pavement, the sticky layer is the middle main structure of the pavement, and the permeable layer is the bottom structure