The Absen method combined with rotary distillation method extracts mineral powder by trichloroethylene, and uses centrifugal separation of mineral powder to recover asphalt. This method tests the penetration, viscosity and softening point of the recycled asphalt to ensure that the asphalt performance meets the requirements of the standard.
The Absen method recovers asphalt
Purpose and Scope of Application
The Absen method is used to efficiently recover bitumen from petroleum asphalt mixtures, ensuring that the properties of the bitumen are not altered during operation. This method is suitable for evaluating the aging degree of asphalt and analyzing the damage causes of asphalt pavement, so as to provide a basis for the mix design of recycled asphalt mixture.
Instruments and materials
The main equipment includes heat-resistant glass flasks, condenser tubes, thermometers, centrifugal separators and high-quality trichloroethylene, etc. In addition, Oil Bath heaters and gas flow meters suitable for high temperatures are required to ensure accurate experimental conditions.
Methods and Steps:
The recycling process includes the preparation of the asphalt mixture, the extraction of the asphalt solution, centrifugal separation, and distillation. By adjusting the temperature and gas flow, the evaporation of the solvent and the change of the properties of the asphalt can be controlled. At the end of the experiment, the recovered bitumen is tested for a number of properties, such as viscosity and softening point.
Rotary evaporator method to recover asphalt
Purpose and Scope of Application
The rotary evaporator method is also used to extract asphalt from asphalt mixtures to ensure that the properties of asphalt are not changed, and is widely used in the evaluation of asphalt aging degree and the recycling design of mixtures.
Instruments and materials
The use of rotating flasks, distillation condensers, Vacuum Pumping devices and other equipment, while ensuring that the trichloroethylene used is of high purity to improve the recovery efficiency.
Methods and Steps:
The experimental procedure is similar to the Absen method, where the bitumen is first extracted by centrifugation, and then the solvent is evaporated under reduced pressure using a rotary evaporator. By adjusting the rotation speed and temperature control, the final recovered asphalt can be tested for properties.
Selling point analysis
1. Efficiency
Modern recycling methods, such as the Absen and rotary evaporator methods, ensure efficient recovery of asphalt from asphalt mixtures and reduce resource waste.
2. Accuracy
Sophisticated instrumentation and control conditions ensure that the properties of the recovered asphalt are similar to those of the original asphalt, providing reliable data for subsequent analysis.
3. Wide range of applications
It is suitable for the detection and research of various asphalt mixtures, and can meet the industry's needs for asphalt performance analysis and recycled asphalt.
4. Eco-friendliness
The use of stable solvents and modern recycling technology reduces environmental pollution and is in line with the concept of sustainable development.
The Absen method combines rotary distillation to extract mineral fines through trichloroethylene solvent and recover bitumen by centrifugal separation and distillation. This method effectively separates mineral powder and asphalt to ensure that the recovered asphalt meets the standard requirements in terms of penetration, viscosity and softening point, and is suitable for asphalt reuse and performance testing.
