Talking about the Application of Solvent in Asphalt and Modified Asphalt

Asphalt is a dark-brown complex organic mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a black or dark-brown high-viscosity organic liquid, semi-solid or solid at room temperature, and has good adhesion. Resistance, plasticity, impermeability and chemical resistance.

Asphalt is one of the important raw materials indispensable for national infrastructure construction and is widely used in road engineering, construction engineering, water conservancy and hydropower engineering and other fields. Especially in recent years, the explosive development of new electronic, wireless and radar equipment has caused serious electromagnetic radiation interference problems. Especially with the advent of the 5G era, electromagnetic pollution is increasing. In this regard, petroleum asphalt has attracted widespread attention for manufacturing efficient electromagnetic wave absorbing materials due to its low cost and huge output.

In addition, most high-grade highways in the world today use asphalt pavements. Compared with other pavements such as cement, asphalt pavements have the advantages of smooth surface, no joints, good wear resistance, and low noise. application. In recent years, with the rapid development of the national economy, the scale of investment in highway construction has continued to expand and the amount of road asphalt has continued to increase. At present, more than 140,000 kilometers of highways have been built in my country, and about 90% of them have adopted asphalt pavements. Asphalt highways are made of asphalt concrete, of which asphalt accounts for 4%. Assuming that the high-speed six-lane asphalt concrete is 0.19 meters thick and 21 meters wide, the new one-kilometer high-speed asphalt consumption is about 411 tons.

my country's asphalt supply mainly comes from imports and domestic production. In terms of imports, my country is currently one of the world’s largest importers of asphalt. In terms of domestic production, the main production areas of domestic asphalt are in East China, Northeast China and South China. Shandong, Jiangsu, Liaoning, Guangdong, Zhejiang and other provinces account for the country’s asphalt production. About 80%. With the deepening of cooperation among countries along the "Belt and Road" and the increase in infrastructure construction cooperation, domestically produced asphalt is not only supplied to the country, but the total export volume is also increasing. In 2018, there was an explosive growth, which nearly doubled year-on-year.

Classification of asphalt
According to different sources and processing methods, asphalt is mainly classified into coal tar pitch, petroleum pitch and natural pitch.