Rock asphalt composite modifier and its preparation method and use
A compound modifier and rock asphalt technology, which is applied to building components, building insulation materials, buildings, etc., can solve the problem of low dynamic stability of asphalt mixture, insufficient high temperature rutting resistance, and poor softening point of modified asphalt. To achieve the effect of enhancing anti-rutting performance and water damage resistance, saving energy consumption, and facilitating construction
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Embodiment 1
[0024] First take 1000g of rock asphalt and 9000g of low density polyethylene (LDPE), blend them through a twin-screw extruder, and then granulate them through a cold-stretched pelletizing equipment. The processing and extrusion temperature is 100°C to obtain a rock asphalt composite modifier. Then put the rock asphalt composite modifier into a mixer with 150°C hot mineral material, perform dry mixing for 10 seconds, and then spray into matrix asphalt and mix for 50 seconds to obtain a composite modified asphalt mixture.
Embodiment 2
[0026] First take 9000g of rock asphalt and 1000g of recycled polyethylene (RPE), blend them through a twin-screw extruder, and then granulate them through a cold-stretched pelletizing equipment. The processing and extrusion temperature is 150°C to obtain a rock asphalt composite modifier. Then put the rock asphalt composite modifier into the hot mineral material at 180° C. for dry mixing for 5 seconds, then spray into the base asphalt and mix for 60 seconds to obtain a composite modified asphalt mixture.
Embodiment 3
[0028] First take 6000g of rock asphalt and 4000g of polyvinyl chloride (PVC), blend them through a twin-screw extruder, and then granulate them through a cold-stretched pelletizing equipment. The processing and extrusion temperature is 250°C to obtain a rock asphalt composite modifier. Then put the rock asphalt composite modifier into the hot mineral material at 200°C for dry mixing for 20 seconds, then spray into the base asphalt and mix for 20 seconds to obtain a composite modified asphalt mixture.
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