A compound aging-resistant road asphalt and its preparation method
A road asphalt and anti-aging technology, which is applied in the direction of building components, building insulation materials, buildings, etc., can solve the problem of not being able to improve the thermal oxygen and photo-oxidative aging performance of asphalt at the same time, and achieve excellent thermal oxygen and photo-oxidative aging performance. Long time, obvious effect of improvement
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Embodiment 1
[0019] The preparation method of the composite aging-resistant road asphalt of the present embodiment comprises the following steps:
[0020] (1) According to the mass parts of each raw material: 91.0 parts of asphalt, 6.0 parts of layered silicate, and 3.0 parts of inorganic nanoparticles are prepared as raw materials and set aside;
[0021] Among them, the asphalt is road petroleum asphalt, the softening point is 46.5°C, and the penetration at 25°C is 71dmm;
[0022] The layered silicate is montmorillonite with a fineness of 25 μm;
[0023] Inorganic nanoparticles are nano-silica with a fineness of 30nm;
[0024] (2) Add asphalt into the shear mixer, heat the asphalt to 160°C, add layered silicate and inorganic nanoparticles respectively, start the shear mixer, keep the temperature at 160°C, and stir at 2000rpm for 2.0 hours, that is have to.
[0025] Thin film oven aging (TFOT) was performed on the compound aging-resistant road asphalt, the viscosity of the compound agin...
Embodiment 2
[0028] The preparation method of the composite aging-resistant road asphalt of the present embodiment comprises the following steps:
[0029] (1) According to the mass parts of each raw material: 98.5 parts of asphalt, 1.0 part of layered silicate, 0.5 part of inorganic nanoparticles to prepare raw materials and set aside;
[0030] Among them, the asphalt is road petroleum asphalt, the softening point is 54.0°C, and the penetration at 25°C is 61dmm;
[0031] The layered silicate is expanded vermiculite and montmorillonite, the ratio of the two is 1:1, the fineness of expanded vermiculite is 23 μm, and the fineness of montmorillonite is 75 μm;
[0032] Inorganic nanoparticles are nano-silica with a fineness of 30nm;
[0033] (2) Add asphalt to the shear mixer, heat the asphalt to 140°C, add layered silicate and inorganic nanoparticles respectively, start the shear mixer, keep the temperature at 140°C, and stir at 8000rpm for 0.5 hours, that is have to.
[0034] The compound ...
Embodiment 3
[0037] The preparation method of the composite aging-resistant road asphalt of the present embodiment comprises the following steps:
[0038] (1) According to the mass parts of each raw material: 96.0 parts of asphalt, 2.0 parts of layered silicate, and 2.0 parts of inorganic nanoparticles are prepared as raw materials and set aside;
[0039] Among them, the asphalt is road petroleum asphalt, the softening point is 49.5°C, and the penetration at 25°C is 65dmm;
[0040] The layered silicate is montmorillonite with a fineness of 50 μm;
[0041] The inorganic nanoparticles are nano-titanium dioxide and nano-zinc oxide, wherein 1.5 parts of nano-titanium dioxide has a fineness of 40nm, and 0.5 parts of nano-zinc oxide has a fineness of 70nm;
[0042] (2) Add asphalt into the shear mixer, heat the asphalt to 150°C, add layered silicate and inorganic nanoparticles respectively, start the shear mixer, keep the temperature at 150°C, and stir at 4000rpm for 1.5 hours, that is have to...
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