Anti-rutting asphalt modifier, preparation method thereof, modified asphalt and application thereof

Abstract

The invention discloses a traffic anti-rutting asphalt modifier and a preparation method thereof, and the asphalt modifier is prepared by the following component in parts by weight: 10-20 parts of polyolefin, 1-80 parts of rubber powder and 0.5-1 part of antioxidant. The invention simultaneously discloses modified asphalt containing the asphalt modifier and an application of the modified asphalt in asphalt mixture. The invention can significantly improve the high-temperature performance and the anti-rutting capacity of the asphalt mixture, improve the resistance to water damage, the resistance to low temperature cracking and other performances and have high performance-price ratio. Compared with asphalt modification, the invention does not need to add an asphalt modification device and can significantly reduce the energy consumption and the loss during the production process, realize the long-term storage, avoid the problem of poor storage stability of the modified asphalt, not affect the design of the mixing proportion, not change the graduation of the asphalt mixture under any content and only need to carry out micro-adjustment on the asphalt-aggregate ratio; the construction process is simple; and the direct input method can realize the addition at will.

Description

technical field [0001] The invention relates to an asphalt modifier used for traffic anti-rutting and a preparation method of the asphalt modifier. [0002] The invention also relates to the modified asphalt containing the asphalt modifier and the application of the modified asphalt in asphalt mixture. Background technique [0003] Current methods of modifying asphalt to improve its high temperature performance and rutting resistance include: [0004] (1) Direct miscibility method [0005] Due to the difference in polymer molecular weight and chemical structure, the solubility rate of asphalt is very different. For modifiers such as SBS and PE, it is not suitable to use spiral blades to stir to produce modified asphalt, but for EVA, APP and APAO, it is easy to be dissolved by asphalt. From an economic point of view, the modified asphalt should be produced by the method of stirring with spiral blades. [0006] For polymers that are not suitable for the production of modifi...

AI Technical Summary

Problems solved by technology

[0047] In addition, there are modification methods such as polymers, fibers, and rubber powders; the limitations of traditional technologies: the addition amount is limited to 4-5%, which cannot fully meet the road use requirements; in addition, technical problems require cumbersome swelling, colloid, etc. Grinding for high-speed shear processing, segregation and other problems during storage

Some roads were severely damaged 1-2 years after they were built and used. Some road sections were damaged in a large area in the year they were opened to traffic, far short of the design life.

Second, the damage range is wide

Third, the degree of damage is serious

[0053] 4) "Asphalt Pavement Design Code JTJ 014-97" emphasizes that there must be a layer of suspended and dense I-shaped structure for waterproofing, which leads to the intensification of rutting

The effect of fiber reinforcement is better, and to achieve higher anti-rutting performance, a high content of fiber is required, and high content of fiber is difficult to disperse evenly in the asphalt mixture, and the unevenly dispersed fiber asphalt mixture not only plays a role It does not have a strengthening effect, but reduces the loose strength of the structure

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