Modified asphalt composition and preparation method thereof
A technology of modified asphalt and composition, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems of increased cost, easy layering and segregation, etc., and achieves prolonging service life, simple process and easy realization Effect
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Embodiment 1
[0032] Heat the base asphalt to 160°C to melt, and add powdered sodium stearate to the base asphalt, wherein the base asphalt is vacuum residue with a penetration of 117 1 / 10mm at 25°C and a softening point of 42.8°C, accounting for 10% of the total 96.53%, sodium stearate accounted for 3.0% of the total, at 160 ° C, mixed with a high-shear emulsifier (rotational speed: 3800r / min) for 10 minutes, and then added evenly for 3 minutes under normal stirring. Asphalt 0.47% glycerin, mixed reaction at the same temperature for 120min, the properties of the modified asphalt were tested (results are shown in Table 1).
Embodiment 2
[0034] Heat the base asphalt to 180°C to melt, and add powdered calcium stearate and sodium stearate into the melted base asphalt while stirring with ordinary stirring equipment. Among them, the 25°C penetration of base asphalt is 130 1 / 10mm, the softening point is 44.5°C, accounting for 95.2% of the total modified asphalt, calcium stearate accounts for 2.5% of the total amount, and sodium stearate accounts for 2.5% of the total amount. 1.5%. Stir and mix for 30 minutes at 180°C, then raise the temperature to 220°C and add a mixture of glycerin and water accounting for 0.8% of the total amount under stirring (the mass ratio of glycerol to water is 3:1), stir and mix for 60 minutes and then cool down to End at 160°C, and test the properties of the modified asphalt (results are shown in Table 1).
Embodiment 3
[0036] Heat the base asphalt to 170°C to melt, add the mixture of powdered zinc stearate, calcium stearate and sodium stearate under stirring with ordinary stirring equipment and stir for 50 min, then raise the temperature to 200°C, add under stirring Glycerin accounts for 1.2% of the total. Among them, the basic asphalt is oxidized asphalt with a penetration of 126 1 / 10mm at 25°C and a softening point of 46.5°C, accounting for 94.3% of the total modified asphalt, zinc stearate accounts for 1.5% of the total, calcium stearate accounts for 1.5% and sodium stearate accounted for 1.5% of the total. Stir at 200°C for 50 minutes with an ordinary paddle stirring device, then heat up to 260°C and stir for 10 minutes, then cool down to 170°C and finish, and test the properties of the modified asphalt (results are shown in Table 1).
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