The role of modified asphalt.
Modified asphalt refers to the asphalt obtained by processing raw materials such as petroleum or coal tar, which goes through a series of chemical and physical modification processes to improve its performance and application range. Modified asphalt is widely used in construction, roads, waterproofing and other fields, and is one of the important materials for modern industry and urban construction. 
First, the first modified asphalt.
Modified asphalt is mainly used in petroleum or coal tar. Petroleum bitumen is extracted directly from petroleum, while coal tar bitumen is a by-product produced through the coal coking process. In the process of upgrading, through high temperature, oxidation, dehydration and catalyst, the components in the asphalt undergo chemical reactions, change their properties, and improve their viscosity, softening point, heat resistance and other indicators.
Second, the role of modified asphalt.
1.Waterproofing of buildings.
Because of its good waterproof performance and durability, modified asphalt is widely used in waterproofing projects on the roof, basement, toilet and other parts of buildings. By laying a modified asphalt waterproofing layer, it can effectively prevent water penetration and protect the building from water. 
2.Road construction.
Modified asphalt has high viscosity and stability, which can meet the needs of road construction. In road construction, modified asphalt is used as a pavement material, which can withstand repeated rolling and friction of vehicles, keeping the road surface smooth and durable.
3.Waterproof material.
Modified asphalt can not only be used as a waterproof material for buildings, but also can be used to make waterproof products such as linoleum and waterproof coatings. These products are widely used in buildings, bridges, tunnels and other projects to provide reliable waterproof protection for projects.
4.Anticorrosive materials.
Because modified asphalt has good corrosion resistance, it can be used as an anti-corrosion material in pipelines, storage tanks, chemical equipment and other fields. By coating the modified asphalt anti-corrosion layer, it can effectively protect the metal materials from corrosion and prolong the service life of the equipment. 
5.Adhesives and sealing materials.
Modified asphalt can also be used as a binder and sealing material. By compounding with other materials, various adhesives and sealing materials can be prepared, which are widely used in construction, automobiles, ships and other fields.
Third, the application prospect of modified asphalt.
With the acceleration of urbanization and the continuous advancement of infrastructure construction, the demand for modified asphalt will continue to grow. At the same time, with the continuous progress of science and technology, the performance and application range of modified asphalt will also be further improved and expanded. In the future, modified asphalt will play a more important role in buildings, roads, waterproofing and other fields, and make greater contributions to the sustainable development of human society.