Lake asphalt/SBR (styrene butadiene rubber) composite modifier and preparation method and application thereof
A compound modifier and lake asphalt technology, applied in the field of materials, can solve problems such as construction machinery failure, poor density, and reduced low-temperature ductility of modified asphalt, and achieve good aging resistance, high resistance, and improved aging resistance. Effect
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Embodiment 1
[0032] Add 9 parts (parts by mass, the same below) of catalytic cracking oil slurry into the heat preservation container of the high-speed shear mixer, and heat it to about 160°C; start the high-speed shear mixer, set the speed at 800rmp, and add 85 parts of properly crushed lake Stir after asphalt for 15 minutes; then increase the speed to 2000rmp, add 6 parts of SBR and stir for 0.5 hours; finally, crush the prepared mixture at 5~10°C to particles with a particle size of no more than 1cm, that is, to obtain lake asphalt / SBR composite modifier pre-dispersion.
[0033] Add 79.9 parts of petroleum asphalt (penetration of 75dmm at 25°C and softening point of 45.2°C) into the heat preservation container of the high-speed shear mixer and heat it to about 160°C; start the high-speed shear mixer and set the speed to 3000rmp, and Add 20 parts of lake asphalt / SBR composite modifier pre-dispersion and 0.1 part of maleic anhydride to petroleum asphalt and stir for 0.5 hours; keep the t...
Embodiment 2
[0039]Add 20 parts of reduced third-line oil into the heat preservation container of the high-speed shear mixer, heat it to about 160°C; start the high-speed shear mixer, set the speed at 1200rmp, add 65 parts of appropriately broken lake asphalt, and stir for 30 minutes; then put Increase the rotation speed to 3000rmp, add 15 parts of SBR and stir for 0.5 hours; finally, the prepared mixture is crushed at 5~10°C to particles with a particle size of no more than 1cm, that is, the lake bitumen / SBR composite modifier pre-dispersion is obtained body.
[0040] Add 51 parts of petroleum asphalt (penetration of 84dmm at 25°C and softening point of 43.7°C) into the heat preservation container of the high-speed shear mixer and heat it to about 160°C; start the high-speed shear mixer and set the speed to 4000rmp, and Add 48 parts of lake asphalt / SBR composite modifier predispersion and 1 part of polyphosphoric acid into petroleum asphalt and stir for 1 hour; keep the temperature at 160...
Embodiment 3
[0046] Add 10 parts of catalytic cracking oil slurry and 7 parts of the third-line oil into the high-speed shear mixer insulation container, heat to about 160 °C; start the high-speed shear mixer, set the speed at 1500rmp, and add 70 parts of properly crushed lake asphalt Then stir for 35 minutes; then increase the rotation speed to 4000rmp, add 13 parts of SBR and stir for 1 hour; finally, the prepared mixture is crushed at 5~10°C to particles with a particle size of no more than 1cm, that is, lake asphalt / SBR composite modifier pre-dispersion.
[0047] Add 65 parts of petroleum asphalt (penetration at 25°C is 68dmm, softening point is 50.1°C) into the heat preservation container of the high-speed shear mixer, and heat it to about 160°C; start the high-speed shear mixer and set the speed to 2500rmp, and Add 34.5 parts of lake asphalt / SBR composite modifier predispersion and 0.5 parts of sulfur into petroleum asphalt and stir for 1 hour; keep the temperature at 160°C, reduce ...
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