The Abson method asphalt recovery instrument is used to recover the asphalt from the petroleum asphalt mixture by the rotary evaporator method, extract the solution for the asphalt pavement or the asphalt mixture, and then remove the solvent in the extract, and during the operation Does not change the properties of the asphalt in the mixture.
Main technical indicators of the Abu Sen method asphalt recovery instrument:
★ Rotating bottle capacity: 1000ml
★ Accept bottle capacity: 1000ml
★ Temperature control range: room temperature -99 ° C
★Rotation speed; 0-150r/min
★ Power: 220v/50HZ
Abu Senfa asphalt recovery instrument installation steps:
★ Unpack the box according to the packing list, scrub and dry the glass device. Install the left main unit and the right side tank. Insert the square grinding port of the four-way ball into the PTFE connecting pipe on the left side of the machine head, and insert it back and forth to make it dense.
★ Unscrew the black lock nut on the right side of the machine head, insert the flange of the threaded glass joint, and then screw the black lock nut onto the machine head, and tighten it flat.
★ Collect the bottle sleeve on the ball-grinding port of the condensing tube and clamp it with a clip.
★The inlet and outlet are connected by a leather tube. Connect the water inlet to the tap water and place the water outlet in the sewer.
★ Connect the suction port of the vacuum pump to the vacuum port of the condenser, and connect the other port to the vacuum gauge port of the water bath.
★ Connect carbon dioxide gas to one end of the flowmeter and connect the other end of the flowmeter to the feeder port.
Aberson method asphalt recycling instrument operating procedures:
Ready to work
★ Prepare the asphalt mixture sample. The primary asphalt should be expected to obtain 80g~120g of recycled asphalt samples. When the asphalt test project is needed, it can be recycled after mixing. If the asphalt mixture is sampled from the road, it should be dried with an electric fan and then heated in a microwave oven or oven to make it loose. However, the heating temperature should not exceed 100 °C. From the start of heating to the loose test of the sample. The item must not exceed 30 minutes.
★ Determine the physical properties of asphalt mixture density and void ratio according to the method specified in this regulation.
★ According to the method of this procedure, the asphalt mixture is extracted by centrifugation to the asphalt solution until the extract is clear and transparent.
★ All the asphalt extracts are packed into the centrifuge tube in turn, and the part of the ore powder in the extract is removed by high-speed centrifugation. The centrifugal force is applied above 770G, and the time of centrifugation is not less than 30min.
★ Take a clean extract and remove some of the filter paper from the filter. After pumping, add a new solution of trichloroethylene to the filter paper. Carefully observe that there are no ore particles on the filter paper, and check whether the ore powder is clean by high-speed centrifugal separation. If necessary, repeat the above steps to extend the separation time until it is confirmed that there is no mineral powder in the extract.
★ Connect the rotary distillation recovery unit and the joints should be sealed and airtight.
★ Adjust the oil bath of the heating unit to 50 °C ± 5 °C.
★ Put all the asphalt extract (about 350mL~400mL) into a clean 1000mL spinner flask, and then wash it with a small amount of solvent and then into the bottle.
★ Start the vacuum pump or air extractor to make the whole system form a negative pressure with a vacuum of 97.4 kPa (719 mmHg) or less.
★ Turn the rotating flask and rotate it at a speed of about 50r/min for 5min~10min without immersing in the heating oil bath.
★ While maintaining the above-mentioned speed rotation, slowly immerse the bottom of the rotating flask in an oil bath of 50 ° C ± 5 ° C, the solvent in the flask begins to evaporate, and when the solution cooled by the condensing device flows into the solvent recovery flask to reach a steady state, , gradually increase the rotation speed. And increase the heating area of the rotating flask immersed in the oil bath to speed up the distillation. Until the solvent-free coagulation recovery, the distillation results in a reduction in the rotational speed to 20 r/min.
★ The rotating flask was kept in a rotating state. At the same time, the oil bath was warmed up, raised to 155 °C ± 2 °C in 15 min, and kept in this state for 15 min, then the CO2 valve was opened and passed at a flow rate of 1000 mL/min for 2 min.
★ Close the CO2 valve, gradually return the inside of the rotating bottle to normal pressure, stop the rotation of the rotating flask, leave the oil bath, and disassemble the device.
★ Quickly pour out the residual asphalt in the flask and carry out various tests for the recovery of asphalt.
★ The test methods for viscosity, penetration, softening point and composition analysis of recycled asphalt are the same as those for the original asphalt.