Rubber asphalt mixture with high-temperature storage stability and preparation method thereof

[0033] Rubber asphalt composition proportioning of the present invention is as follows:

[0034] 40 mesh rubber powder 15%

[0035] Base bitumen 84%

[0036] Slow-release chemical modifier (benzoyl peroxide) 1%

[0037] The preparation process is as follows

[0038] (1) Heat Zhenhai base asphalt with a penetration (25°C) of No. 110 to 180°C-190°C, add 40-mesh waste tire rubber powder, stir for 10 minutes, and then perform high-shear grinding for 2 to 3 times before placing Stir in the development tank for 1h;

[0039] (2) Add 1% slow-release chemical modifier (benzoyl peroxide), stir evenly, and then inject compressed air from the bottom of the tank. Air volume is 0.2m 3 × kg -1 × h -1 . Continue to stir for 1 hour, and the properties of rubber asphalt are shown in Table 1.

[0058] 60 mesh rubber powder 15%

[0059] Base bitumen 84%

[0060] Slow-release chemical modifier (benzoyl peroxide) 1%

[0061] The preparation process is as follows

[0062] (1) Heat Zhenhai base asphalt with a penetration (25°C) of No. 110 to 180°C-190°C, add 60 mesh waste tire rubber powder and stir for 15 minutes, then undergo high-shear grinding for 2 to 3 times before developing Stir in the tank for 1.5h,

[0063] (2) Add 1% slow-release chemical modifier (benzoyl peroxide), stir evenly, and then inject compressed air from the bottom of the tank. Air volume is 0.4m 3 × kg -1 × h -1 . Continue to stir for 1 hour, and the properties of rubber asphalt are shown in Table 1.

[0065] 60 mesh rubber powder 15%

[0066] Base bitumen 84%

[0067] Slow-release chemical modifier (azobisisobutyronitrile) 1%

[0068] The preparation process is as follows

[0069] (1) Heat the Zhenhai base asphalt with a penetration (25°C) of No. 110 to 180°C-190°C, add 40 mesh waste tire rubber powder and stir for 10 minutes, and then undergo high-shear grinding for 2 to 3 times before developing Stir in the tank for 1.5h,

[0070] (2) Add 1% slow-release chemical modifier (azobisisobutyronitrile), stir evenly, and then pass compressed air from the bottom of the tank. The air volume is 0.4m 3 × kg -1 × h -1 . Continue to stir for 1 hour, and the properties of rubber asphalt are shown in Table 1.