A kind of high-performance modified asphalt and its preparation method
A modified asphalt, high-performance technology, used in building components, building insulation materials, buildings, etc., can solve the problems of incompatibility, side effects, and single modification effect, so as to reduce the difficulty of modification and reduce early cracking. Risk, effect of slowing down the rate of stratification and segregation
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[0044] Examples 1-18, a high-performance modified asphalt, its components and corresponding quality are shown in Table 1, and prepared by the following steps.
[0045] S1: Natural modification: heat base asphalt to 150°C, add rock asphalt powder modifier while stirring, then continue to heat up to 180°C, and fully stir for 60 minutes with an ordinary high-speed mixer at 4000 rpm to obtain rock asphalt modification asphalt;
[0046] S2: Add octylphenol polyoxyethylene ether to rock pitch modified asphalt, and stir for 15 minutes to obtain rock pitch modified asphalt dispersion;
[0047] S3: Adjust the temperature of rock asphalt modified asphalt dispersion to 180°C, quickly add rubber powder modifier to the dispersion, add dodecamethylcyclosiloxane at the same time, turn on the shearing machine, and obtain mixed modified asphalt ;
[0048] S4: Put the mixed modified asphalt in an environment with a temperature of 180°C for 1 hour;
[0049] S5: Add a shrinking agent to the mi...
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