1. Introduction.
Coal asphalt and petroleum asphalt are two commonly used asphalt materials, and they have differences in chemical composition, physical properties and application fields. This document will detail the technical properties of these two types of bitumen.
Second, coal asphalt.
Coal pitch is processed from coal tar, and its chemical composition is mainly composed of polycyclic aromatic hydrocarbons and fused aromatic hydrocarbons. Coal pitch has a larger molecular weight, so its viscosity is higher. At high temperatures, coal pitch has good chemical stability, but it is easy to brittle at low temperatures.
1.Physical.
The density of coal pitch is usually in the range of 12 to 14, its appearance is black or dark brown. Coal pitch has good insulation properties and corrosion resistance.
2.Fields of application.
Coal asphalt is widely used in building materials, waterproof materials, anti-corrosion coatings and other fields. In addition, coal pitch can be used to produce products such as fuel oil and carbon black.
3. Petroleum asphalt.
Petroleum bitumen is processed from petroleum, and its chemical composition is mainly composed of saturated hydrocarbons, aromatic hydrocarbons and gums. Petroleum bitumen has a relatively small molecular weight, so it has a lower viscosity. In both high and low temperature environments, the chemical stability of petroleum asphalt is good.
1.Physical.
The density of petroleum bitumen is usually in the range of 09 to 12, its appearance is black or dark yellow. Petroleum asphalt has good fluidity and is easy to process and apply.
2.Fields of application.
Petroleum asphalt has been widely used in road construction, waterproof materials, anti-corrosion coatings and other fields. In addition, petroleum bitumen can also be used in the production of fuel oil and other chemical products.
4. Compare the technical properties of coal asphalt and petroleum asphalt.
1.Chemical Composition: Coal pitch is mainly composed of polycyclic aromatic hydrocarbons and fused aromatic hydrocarbons, whereas petroleum bitumen is mainly composed of saturated hydrocarbons, aromatic hydrocarbons, and gums.
2.Physical properties: Coal pitch has a higher density and viscosity, whereas petroleum pitch has a lower density and viscosity. In addition, coal asphalt has good insulation properties and corrosion resistance, while petroleum asphalt has good fluidity and is easy to process and apply.
3.High temperature stability: Coal asphalt has good chemical stability at high temperatures, while petroleum asphalt has good chemical stability in both high and low temperature environments.
4.Applications: Coal asphalt is widely used in building materials, waterproof materials, anti-corrosion coatings and other fields, while petroleum asphalt is widely used in road construction, waterproof materials, anti-corrosion coatings and other fields. In addition, coal bitumen can be used to produce products such as fuel oil and carbon black, while petroleum bitumen can be used to produce fuel oil and other chemical products.
5.Production process: Coal pitch is processed from coal tar, and petroleum asphalt is processed from petroleum. Therefore, the production process of coal asphalt is relatively complex, while the production process of petroleum asphalt is relatively simple.
6.Environmental impact: The production process of coal asphalt will produce more waste gas and wastewater, which will have a certain impact on the environment. The production process of petroleum asphalt will also produce a certain amount of pollution, but relatively little. Therefore, when using two kinds of asphalt, attention should be paid to environmental protection requirements and corresponding environmental protection measures should be taken.