Asphalt powder is a black powdery substance, mainly composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a type of high-viscosity organic liquid that is liquid with a black surface and is soluble in carbon disulfide. Asphalt powder is mainly used in coal coke asphalt, petroleum asphalt and natural asphalt. Here are the main characteristics of asphalt powder::
1. Black powder: Asphalt powder is black, the appearance is powdery, and the particle size is usually 0between 1-100 microns.
2. High viscosity: asphalt powder has a high viscosity, and its viscosity changes with temperature, and generally decreases with the increase of temperature.
3. Good waterproof and moisture-proof performance: The main components of asphalt powder have good waterproof and moisture-proof properties, which can be used to prepare waterproof materials.
4. Corrosion resistance: Asphalt powder has good corrosion resistance and can be used for anti-corrosion materials.
5. Thermal stability: asphalt powder has good stability at high temperature, and its physical and chemical properties change little with temperature.
6. Oiliness: Asphalt powder has a certain oiliness and can be miscible with other organic substances.
7. Flammability: Asphalt powder has a certain flammability, but the combustion rate in the air is slower.
Toxicity: Some components in asphalt powder, such as anthracene, phenanthrene, pyrene, etc., are toxic and harmful to the human body and the environment, so they need to be reasonably treated and stored.
In a word, asphalt powder is a black powdery substance with high viscosity, good waterproof and moisture-proof properties, corrosion resistance and thermal stability, which is widely used in construction, coatings, plastics, rubber and other fields. However, it should be noted that some components in asphalt powder have certain toxicity and environmental pollution risks, so appropriate protective measures should be taken during production and use.