Among them, the conservation asphalt pavement is usually divided into three categories: preventive maintenance, corrective maintenance, emergency maintenance. These three types of conservation based on road usage can be selected Shandong asphalt, each type of conservation and the need to select a different conservation methods and maintenance equipment. Three conservation measures the difference is mainly reflected in the length of road conditions and traffic. Of course no clear boundaries between the asphalt, three. After decades of research and development of asphalt manufacturers, it has emerged a wide variety of modified road asphalt waterproofing membrane and coating asphalt prices, showing some practical effect. But given the price of the modified material 2 to 7 times higher than the average generally asphalt, materials engineering performance users have not been able to fully grasp, modified bitumen production slow growth. Modified road asphalt pavement is mainly used for applications runway, waterproof deck, parking lot, playground, heavy traffic roads, intersections and road bends and other special occasions. Europe will apply to modified asphalt road network maintenance and reinforcement, greatly promoted the universal application of modified asphalt road. Modified bitumen membrane for waterproofing and coatings mainly high-end buildings. Asphalt spot, three level chemical quality assurance (certification), bitumen provided by the Jinan Chemical Co., Ltd. three levels. Jinan three ping Chemical Co., Ltd. (www.sanpinghuagong.com) Shandong Jinan, chemical products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Three-ping Chemical leadership with the staff warmly welcome all inquiries negotiations to create three levels of chemical better future.