Novel compound modified asphalt and preparing method thereof
A composite modified asphalt, a new type of technology, used in building components, building insulation materials, buildings, etc., can solve the problem of lack of modification function, inability to synergize modification effect of waste rubber powder, weakening the modification effect of rubber powder on asphalt, etc. problems, to achieve the effect of improving storage stability, avoiding performance decay, and good strength performance
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Embodiment 1
[0021] First heat 790g of molten matrix pitch, keep the temperature at 130°C, add 10g of sulfur-doped graphene and perform mechanical stirring for 2h, then raise the temperature to 160°C, then add 150g of 80-mesh waste rubber powder under stirring, and then cool down to 120°C Keep it for 1h to make it fully swell, continue to shear on a high-speed shear for 0.5h, the shearing temperature is 120°C, then raise the temperature to 160°C, after the temperature is stable, add 50g of 2-mercaptobenzene while stirring After the addition of thiazole and 2-mercaptobenzothiazole is completed, the insulation and stirring are continued for 0.5 h, and finally a new type of composite modified asphalt is obtained.
[0022] The road performance test method of composite modified asphalt is carried out according to the "Experimental Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" JTGE20-2011, and the test results are shown in Table 1.
Embodiment 2
[0024] First heat 700g of molten matrix pitch, keep the temperature at 140°C, add 50g of sulfur-doped graphene and perform mechanical stirring for 4 hours, then raise the temperature to 170°C, then add 220g of 60-mesh waste rubber powder under stirring, and then cool down to 145°C Keep it for 3 hours to make it fully swell, continue to shear on a high-speed shear for 0.8 hours, the shear temperature is 145°C, and then raise the temperature to 170°C, after the temperature is stable, add 45g of 4,4'-di After the addition of dimorpholine sulfide and 4,4'-dimorpholine disulfide is completed, the heat preservation and stirring are continued for 0.6 h to finally obtain a new type of composite modified asphalt.
[0025] The road performance test method of composite modified asphalt is carried out according to the "Experimental Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" JTGE20-2011, and the test results are shown in Table 1.
Embodiment 3
[0027] First heat 590g of molten base asphalt, keep the temperature at 150°C, add 100g of sulfur-doped graphene and carry out mechanical stirring for 6h, then raise the temperature to 180°C, then add 300g of 40-mesh waste rubber powder under stirring, and then cool down to 150°C Keep it for 4 hours to make it fully swell, continue to shear on a high-speed shear for 1 hour, the shearing temperature is 150°C, and then heat up to 180°C, after the temperature is stable, add 60g of diphenylguanidine and diphenylguanidine while stirring After the addition is complete, continue to keep warm and stir for 1 hour, and finally obtain a new type of composite modified asphalt.
[0028] The road performance test method of composite modified asphalt is carried out according to the "Experimental Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" JTGE20-2011, and the test results are shown in Table 1.
[0029] Table 1 Performance test results of composite modified asphalt
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