Anti-rut asphalt modifier and preparation method thereof and modified asphalt and application thereof

Abstract

The invention discloses a traffic anti-rut asphalt modifier and a preparation method thereof; the asphalt modifier is prepared from the following components in parts by weight: 20 to 200 parts of thermoplastic elastomer, 5 to 450 parts of polyolefin, and 5 to 400 parts of rubber powder. Simultaneously, the invention also discloses modified asphalt which contains the asphalt modifier and application of the modified asphalt in asphalt mixture. The invention can significantly improve the high-temperature performance and the anti-rut capability of the asphalt mixture, improves anti-water damage and anti-low temperature cracking and other performance, and has high cost performance. Compared with asphalt modification, the invention does not need to add asphalt modification equipment, can significantly reduce energy consumption and loss in the production process, can realize long-termed inventory, prevents the problem of the poor storage stability of modified asphalt, does not affect the mixing proportion design, does not change the gradation of the asphalt mixture under any content, only finely adjusts the asphalt-aggregate ratio, has simple construction process, and realizes random adding through a direct feeding method.

Description

Technical field [0001] The invention relates to an asphalt modifier for anti-rutting traffic, and also relates to a preparation method of the asphalt modifier. [0002] At the same time, it also relates to the modified asphalt containing the above-mentioned asphalt modifier and the application of the modified asphalt in the asphalt mixture. Background technique [0003] The current modified asphalt methods to improve the high temperature performance and rutting resistance of asphalt 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 produce modified asphalt. For EVA, APP, APAO, it is easy to be dissolved by asphalt. For the polymer, from an economic point of view, the method of mixing with spiral blades should be used to produce modified asphalt. [0006] For polymers that are not ...

AI Technical Summary

Problems solved by technology

[0049] 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

[0055] 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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