Asphalt modified material and application thereof
A kind of asphalt modification, asphalt technology, applied in building insulation materials, building components, buildings, etc., can solve the problems of small nano-ZnO particle size, large specific surface area, high surface energy, etc., achieve good compatibility and reduce photocatalytic effect , the effect of improving the uniformity of dispersion
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Embodiment 1
[0022] Step 1: First, add nano-ZnO into deionization and stir it into a slurry (the mass fraction of ZnO is about 15-25%); 2 ·nH 2 O) dissolve in caustic alkali, adjust pH=8~10, mix the two, control the temperature at 60~80 ℃, then stand still, filter, and dry at suitable temperature (125~150 ℃) to obtain ZnO / SiO 2 composite material, of which SiO 2 The mass ratio with ZnO is 2%: 1;
[0023] Step 2: Dissolve stearic acid in toluene solution, mix ZnO / SiO 2 The composite material is dissolved in a toluene solution at 60-80 °C and stirred for 30 minutes, then centrifuged, dried and ground to form an asphalt modified material, dried at 125 to 150 °C and evenly ground to obtain an asphalt modified material, in which stearic acid and ZnO / SiO 2 The mass ratio of composite materials is 2%:1.
Embodiment 2
[0025] Compared with 90# asphalt, the asphalt modification test was carried out with the nano-ZnO modifier and the asphalt modified material of Example 1 of the invention as modifiers, and the mass of nano-ZnO and ZnO in the asphalt modified material accounted for the asphalt mass. 0%, 1%, 2%, 3%, 4% and 5% are modified for asphalt. In this example, the asphalt segregation experiment (ie, the softening point difference) is used to test and analyze the asphalt modified material of Example 1. Dispersion uniformity of ZnO in asphalt. The specific method is as follows:
[0026] Step 1: Dry the synthesized asphalt modified material at a constant temperature (the temperature is controlled at 125-150°C) and grind it uniformly;
[0027] Step 2: Put the stainless steel heat transfer container matched with the high-speed shearing emulsifier in a constant temperature oil bath and heat it to 170-200℃, weigh the molten base asphalt and pour it into the heat-transfer container; then, start...
Embodiment 3
[0036] Compared with 90# asphalt, the asphalt modification test was carried out with nano-ZnO and the asphalt modification material modifier of the present invention respectively. The modified asphalt was 40cm away from the light source and the light intensity was 15A after UV aging for 40h and before aging at 25. The ratio of penetration measured at ℃, the increase in softening point after aging compared to before aging, and the ratio of ductility measured at 5℃ after aging and before aging are used as indicators to test and analyze the improvement of ZnO on the aging resistance of asphalt , namely, the residual penetration ratio (25°C), the softening point increment, and the residual ductility ratio (5°C). The stronger the anti-aging performance of the modified asphalt, the more uniform the dispersion of nano-ZnO in the asphalt.
[0037] According to Example 2, 90# asphalt was modified with the mass of nano-ZnO and ZnO in the asphalt modified material of the present inventio...
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