High-concentration crumb rubber modified asphalt and preparation method thereof
A modified asphalt, high-concentration technology, applied in building components, building insulation materials, construction, etc., can solve the problems of unscientific influence of rubber powder modified asphalt and asphalt mixture, long processing cycle, limited swelling of asphalt, etc. Achieve the effect of improving anti-segregation performance, great social significance and industry value, and large filling amount of rubber powder
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Embodiment 1
[0029] According to the number of parts by mass, put 100 parts of waste rubber powder in the reactor, first stir at 400r / min at a low speed for 3min, then stir at a high speed of 600r / min for 1min, and raise the temperature to 45°C, and fill 45 parts of the preheated to 50°C Spray the barrier agent (silicone oil: linolenic acid = 2:1) into the above waste rubber powder, stir at 1200r / min at a high speed for 5min at a temperature of 55°C, cool with air for 2min, and store for 48h when the temperature drops to 40°C , and then use a double-roll mill to shear and blend the premixed rubber powder and 10 parts of filling barrier agent, then disperse it, store it at room temperature for 48 hours, and obtain the modified rubber powder for high-performance and high-filling asphalt. 45 parts of rubber powder, 1 part of reinforcing agent and 100 parts of base asphalt were stirred at 170 °C for 15 minutes at a speed of 800 r / min and high-speed sheared at 10000 r / min for 45 minutes to obtai...
Embodiment 2
[0031] According to the number of parts by mass, put 100 parts of waste rubber powder in the reactor, first stir at 500r / min at a low speed for 1min, and stir at a high speed of 800r / min for 3min, and raise the temperature to 45°C, and fill 55 parts of the preheated to 50°C (naphthenic oil: industrial oleic acid = 3:1) was sprayed into the above waste rubber powder, stirred at a high speed of 800r / min for 2min, air-cooled for 3min, and stored for 48h after the temperature was lowered to 40°C, and then kneaded with two rollers The premixed rubber powder and 15 parts of filling barrier agent were sheared and blended by the machine, then dispersed, and stored at room temperature for 48 hours, and the modified rubber powder for high-performance and high-filling asphalt was obtained. Mix 60 parts of rubber powder, 1 part of reinforcing agent and 100 parts of base asphalt at 170°C for 15 minutes at a speed of 800 r / min, and high-speed shear at 10,000 r / min for 45 minutes to obtain wa...
Embodiment 3
[0033] According to the number of parts by mass, put 100 parts of waste rubber powder in the reactor, firstly stir at 400r / min at low speed for 3min, then switch to 800r / min for 3min at high speed, and raise the temperature to 45°C, and preheat 70 parts of waste rubber powder to 60°C Fill the barrier agent (waste plastic pyrolysis oil: debasement asphalt = 4: 1), stir at 800r / min for 2 minutes, air-cool for 5 minutes, store for 48 hours, and then use a double-roller mill to mix the premixed rubber powder with 20 parts of the filling barrier The modified rubber powder for high-performance and high-filling asphalt was obtained after shearing treatment, dispersion, and storage for 48 hours. Mix 60 parts of rubber powder, 1 part of reinforcing agent and 100 parts of base asphalt at 180°C for 30 minutes at a speed of 1200 r / min, then shear for 45 minutes at a speed of 12000 r / min to obtain waste rubber powder modified asphalt binder.
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