Warm-mix asphalt, preparation method thereof and special compound modifying agent
A composite modifier and warm-mix asphalt technology, which is applied in building insulation materials, building components, climate change adaptation, etc., can solve problems such as reducing asphalt mixing temperature, reduce high-temperature viscosity, increase low-temperature ductility, and improve softening point effect
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Embodiment 1
[0040] Embodiment 1, preparation warm asphalt
[0041] Heat the base bitumen (made by mixing CNOOC residual oil and minus four-line wax oil) with a penetration of 3491 / 10mm at 25°C and a softening point of 29°C (accounting for 96.5% of the total mass) to 170°C until it is molten , add 2.5% SBS to the base asphalt, use a high-speed shearing machine (10000r / min) to mix for 20min, then add 1.0% composite modifier, and finish the mixing reaction at 180°C for 60min to obtain warm mix asphalt , and its physical and chemical properties are listed in Table 1.
[0042]The composition of the composite modifier is: bis-(γ-triethoxysilylpropyl) tetrasulfide is 40%, MCM-41 molecular sieve (pore diameter is 10nm, specific surface area is 1100m 2 / g) is 60%, both are mass percentages.
Embodiment 2
[0043] Embodiment 2, preparation warm asphalt
[0044] Heat the base asphalt (made by mixing CNOOC residual oil and minus four-line wax oil) with a penetration of 3391 / 10mm at 25°C and a softening point of 31°C (accounting for 95% of the total mass) to 180°C until it is in a molten state , add 4% SBS to the base asphalt, use high-speed shearing machine (speed 10000r / min) to mix for 20min, then add 1.0% composite modifier, mix and react at 180°C for 60min and end, to obtain warm mix asphalt , and its physical and chemical properties are listed in Table 1.
[0045] Wherein the composition of the composite modifier is: bis-(γ-triethoxysilylpropyl) tetrasulfide is 50%, MCM-41 molecular sieve (aperture is 6nm, specific surface area is 700m 2 / g) is 50%, both are mass percentages.
Embodiment 3
[0046] Embodiment 3, preparation warm asphalt
[0047] Heat the base asphalt (made by mixing CNOOC residual oil and minus four-line wax oil) with a penetration of 3141 / 10mm at 25°C and a softening point of 39°C (accounting for 94.2% of the total mass) to 110°C until it is molten , add 5% SBS and 0.5% F127 to the base asphalt, use a high-speed shearing machine (speed 10000r / min) to mix for 60min, then add 0.3% composite modifier, mix and react at 180°C for 60min, then end , to obtain warm mix asphalt, whose physical and chemical properties are shown in Table 1.
[0048] The composition of the composite modifier is: bis-(γ-triethoxysilylpropyl) tetrasulfide is 40%, SBA-15 molecular sieve (pore size is 4nm~20nm, specific surface area is 600m 2 / g) is 60%, both are mass percentages.
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Abstract
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