Coal asphalt manufacturer Gao Xiao
Modified asphalt refers to the asphalt obtained by deep processing of coal tar or ordinary asphalt. It has the following characteristics and properties:
The appearance is black solid at room temperature, shiny, and brittle lumps. Smell, foul smell. It is a toxic gas and needs to be paid attention to safety. The boiling point is less than 470 and the flash point is 2044℃。The relative density is 115~1.25.The coking value is 54 and the ash content is 03. Moisture 5
During processing, the dehydrated tar is pressurized to 0 in the reaction kettle5 2MPa, heated to 320 370, keep 5 20h, useful components in the type tar, especially heavy oil components, and low boiling point unstable heterocyclic components, in the reaction kettle polymerization into asphaltene, so as to obtain the best quality modified asphalt.
Modified asphalt refers to asphalt that changes the physical and chemical properties of ordinary asphalt through specific processing technology to improve its high temperature resistance, corrosion resistance, wear resistance and other properties. Modified asphalt is widely used in highways, construction, industry and other fields. It plays an important role in improving the quality of the project and prolonging the service life.
There are many production technologies for modified asphalt, and the commonly used ones are heat treatment, reheating after cooling, temperature regulation, etc. The basic principles, advantages and disadvantages of these methods are as follows:
1. Heat treatment: through heating and pressurization, the asphalt is in a state of high temperature and high pressure, so as to achieve improvement. The advantage is that the process is simple and the cost is low. The disadvantage is that the improvement effect is limited, and it is easy to cause environmental pollution.
2. Reheating after cooling: cooling the asphalt heating material after high temperature, and reheating the material at another high temperature. The advantage is that the effect is better, and it can be applied to many types of asphalt. The disadvantage is that the process is complex and the energy consumption is high.
3. Temperature regulation: By constantly adjusting the temperature of the asphalt, it can be modified within a specific temperature range. The advantages are low energy consumption and low pollution. The disadvantage is that the modification effect is relatively poor, and the process control requirements are high.
The production process of different types of modified asphalt is different, but in general, its process flow includes raw material preparation, heating, reaction, cooling, packaging and other links. The required equipment includes reactors, agitators, heaters, coolers, packaging machines, etc. The specific equipment model and quantity should be determined according to the production scale and process requirements.
In order to ensure that the quality of modified asphalt products meets the requirements of the standard, a sound quality control system should be established, including raw material inspection, process monitoring, finished product testing and other links. At the same time, appropriate testing methods, such as viscosity test strips, performance tests, etc., should be used to accurately evaluate product quality. In addition, the quality control system should be regularly evaluated and improved to ensure its effectiveness.
With the continuous progress of science and technology, the production technology of modified asphalt is also developing. At present, some mainstream or emerging modified asphalt technologies include: nanotechnology modification, biological enzyme catalytic modification, etc. These technologies have higher environmental protection and modification effects, which is an important direction for the development of modified asphalt in the future, and at the same time, in order to improve production efficiency and quality stability, enterprises should strengthen the application of automation technology.