As a new technology for green, environmental protection, and safe durable pavement, porous asphalt pavement is used as a road surface structure and functional layer. It has the following advantages:
(1) Based on the optimized mix design, the "skeleton-void structure" formed by the contact of coarse aggregates provides bearing capacity and has good resistance to rutting deformation;
(2) Through the improvement of material performance and index control, durable porous asphalt pavement has good anti-scattering damage performance.
(3) The large void structure of porous asphalt pavement has a good drainage function, so there is no water on the surface of the road in rainy weather, which prevents the possibility of "water drift" formed by high-speed vehicles, and no splashing and water mist are generated when the vehicle is driving. Phenomenon, greatly improving the safety of driving in rainy weather.
(4) The porous asphalt pavement has rough surface, large structure depth and high skid resistance.
(5) Porous asphalt pavement is a low-noise pavement. Compared with ordinary densely graded pavement, it can reduce noise by about 3~5dB. Under rainy conditions, porous asphalt pavement will have a more obvious noise reduction effect.

The porosity of porous asphalt pavement is generally between 18% and 25%, while the porosity of SMA asphalt pavement is generally between 3% and 4%. In contrast, porous asphalt pavement can save 15% to 20% of asphalt mixture.Material consumption. The reduction in the amount of asphalt mixture will directly contribute to energy saving and emission reduction.