Asphalt concrete pavement, or asphalt road or asphalt road, is a widely used road pavement.
Although it is sometimes called asphalt road, asphalt has been replaced by asphalt because of its harm to health. The materials needed for paving asphalt roads are graded granular materials, crushed stone grading, asphalt cement, aggregate, stone powder and so on. The required tools include graders, excavators, vibratory rollers, trucks, road scrapers, asphalt pavers, pavers, pressure oil spill trucks, etc.
construction sequence
Basically, it can be divided into five steps: preparation before construction, graded paving of crushed stones, thickness control of asphalt concrete, pouring and paving of adhesive layer or prime coat, and paving of asphalt concrete.
distinguish
Asphalt is usually mistaken for asphalt. Asphalt is extracted from petroleum, while asphalt comes from coal or coal tar. Because of the harm of asphalt to health, Germany has banned the use of asphalt in road engineering since 1984, and it was determined in the technical specification named "Dangerous Material 551"("Dertechnische regel fü r gefahrstoffe 551"). Prior to this, asphalt was widely used in construction projects.