Asphalt can be divided into coal pitch, oxidized asphalt petroleum pitch and natural pitch:

Coal tar pitch: Coal tar pitch is a by-product of coking plants, that is to say, coal pitch is a kind of pitch produced by coking plants. E. Education It is only different from the physical properties of the purifying resin, there is no obvious binding. The general cracking method is the pitch with softening temperature lower than 26.7 ℃ (cube method) and softening temperature higher than 26.7 ℃. Coal pitch mainly contains anthracene, EFFI, pyrrole, etc. These substances are toxic. Due to the different contents of these components, stone pitch properties are also different. Temperature changes have obvious effects on stony asphalt. Simple cracking in winter, mild in summer. Special smell during heating; Anthracene, plants, pyrrolidine and other components evaporate after heating to 260°C for 5 hours.

Petroleum bitumen: Petroleum bitumen is the oxidized asphalt waste product of petroleum distillation. Depending on the degree of purification, it can be converted into liquid, semi-solid or solid at room temperature. Petroleum asphalt is black, shiny and sensitive to high temperature. Since the distillation temperature in the production process exceeds 400 ° C, its evaporative components are small, but there may still be high molecular hydrocarbons that do not evaporate, which is more or less harmful to human health. Dangerous.

3. Natural asphalt: Natural asphalt is stored underground, some of which form ore layers or accumulate on the surface of the earth's crust. This bitumen is generally naturally evaporated and oxidized and generally does not contain toxic substances.If you have any other questions, please contact us for oxidized asphalt details or contact us directly.

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