Nano-zinc oxide-filled diatomite-rubber powder composite modified aging-resistant asphalt and preparation method thereof
A technology of nano-zinc oxide and compound modification, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of resource waste, environmental pollution, etc., achieve good compatibility, improve light and oxygen aging resistance, and improve heat resistance Effect of Oxygen Aging Properties
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[0018] A preparation method for aging-resistant asphalt modified by diatomite-rubber powder composite modification filled with nano-zinc oxide, characterized in that, the following steps are carried out:
[0019] a. Calcinate 4kg of diatomite at 500-600°C for 1 hour, mechanically grind and pulverize it, pass through a 200-mesh sieve, and dry it in an oven at 130-140°C for 1 hour;
[0020] b. Surface modification of waste rubber powder:
[0021] Mechanically pulverize 8 kg of waste tires and pass through a 60-mesh sieve to obtain waste rubber powder;
[0022] Add distilled water to ethanol to make a solution with an alcohol content of 90%, add acetic acid to adjust the pH to 4-6, add 0.5kg of silane coupling agent under stirring, hydrolyze for 10 minutes, spray it evenly on the surface of rubber powder, and mix thoroughly; Treat under 600-700W microwave for 10 minutes, soak in sodium hydroxide solution, heat up to 50-60°C and stir for 30 minutes; then dry in an oven at 80-90°C...
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