Modified asphalt has excellent performance and there are opportunities for industry development

Modified asphalt refers to an asphalt binder made by mixing rubber, plastic, synthetic resin, polymer and other material modifiers with base asphalt by utilizing the principle of organic matter miscibility. Modified asphalt has the advantages of waterproof fog, high temperature resistance, and crack resistance, and can maximize the load-bearing capacity of the road.

Modified asphalt raw materials include SBS modifier, stabilizer and matrix asphalt. SBS modifier can change the toughness, elasticity and ductility of base asphalt. It needs to go through three processes of swelling, shearing and development to make modified asphalt. Stabilizers are auxiliary materials in the preparation process of modified asphalt and can ensure its long-term storage. Base asphalt plays a decisive role in the performance and quality of modified asphalt and accounts for its main production cost. Currently, No. 70, No. 90 and No. 110 base asphalt are the main raw materials for modified asphalt.

According to the “2022-2027 Modified Asphalt Industry In-depth Market Research and Investment Strategy Suggestions Report released by the Industrial Research Center, the reform Plastic asphalt is mainly used in fields such as waterproofing materials and highway construction. In the field of waterproof materials, modified asphalt has properties such as moisture-proof, anti-corrosion, and mildew-proof, and can be used to produce modified asphalt waterproof coatings. According to statistics from the China Building Waterproofing Association, the current roof leakage rate in my country reaches 95.3%; the basement leakage rate reaches 57.5%. In this context, the market demand for modified asphalt waterproof coatings as a new type of environmentally friendly coatings continues to grow. In the field of highway construction, modified asphalt can be used in special scenarios such as paving intersections, waterproof bridge decks, road turns, and airport runways.

Modified asphalt is generally divided into three categories, including blended polymer modified asphalt, rubber and thermoplastic elastomer modified asphalt, and plastic and synthetic resin modified asphalt. Blended polymer modified asphalt refers to modified asphalt made by adding two or more polymers to base asphalt; rubber and thermoplastic elastomer modified asphalt include various rubber modified asphalts such as styrene-butadiene, SBS and so on. ; Plastic and synthetic resin modified asphalt is usually made by mixing plastic, synthetic resin and matrix asphalt.

my country’s modified asphalt industry started late. Due to factors such as high technical barriers, the product market penetration rate is low. At present, most modified asphalt production enterprises in my country are state-owned enterprises, including China National Offshore Oil Corporation, China National Petroleum Corporation, and China Petroleum & Chemical Corporation. The above three enterprises account for nearly 90.0% of the Chinese market.

Industry analysts said that modified asphalt has excellent performance and is in strong demand in areas such as highway construction and waterproofing materials. However, currently, due to factors such as high technical barriers, my country’s modified asphalt market penetration rate is low, and industry development faces challenges. In recent years, my country’s modified asphalt R&D and production technology have continued to make breakthroughs, and some leading companies have achieved large-scale production capabilities, which will provide driving support for the development of my country’s modified asphalt industry.