Asphalt pavement is mainly made of asphalt materials, supplemented by coarse aggregate and fine aggregate. Among asphalt materials, it can be divided into coal coke, oil and natural gas. Coal tar pitch is the substance remaining in the container after charring; Petroleum asphalt is the residue of crude oil distillation;

Natural asphalt generally exists underground, stored in mines or underground. Asphalt is divided into three grades. The first grade is the best, the second grade is the second, and the third grade is the worst. Which grade of asphalt is used depends on the condition of the road.

Coal tar asphalt and petroleum asphalt are mostly used in road construction, and the price is relatively cheap.

Asphalt pavement has too many benefits. Its bearing capacity is strong enough to bear well when the weight of vehicles acts on the pavement; It has strong plasticity and can ensure safer vehicle operation; He can reduce the noise.

Asphalt pavement makes our environment quieter, cars safer and longer service life.