Traffic anti-track asphalt modifier and its modified asphalt and asphalt mixture

Abstract

The present invention discloses one kind of rut resisting road asphalt modifier, and its modified asphalt and asphalt mixture material. The rut resisting road asphalt modifier consists of thermoplastic elastomer of vinyl arene-conjugated diene block copolymer 20-200 weight portions, polyolefin 5-950 weight portions and lignocellulose 30-60 weight portions. The thermoplastic elastomer of vinyl arene-conjugated diene block copolymer is SBS, SIS, SEBS and / or SEPARATES; and the polyolefin is PE, PP, EVA, APP, APAO, POE, HDPE, LDPE and / or LLDPE. The present invention also discloses the preparation process of the asphalt modifier. The asphalt modifier can raise the high temperature performance and rut resisting performance of asphalt mixture material obviously, and can also raise its water damage resistance, low temperature cracking performance, etc.

Description

【Technical field】 [0001] The invention relates to an asphalt modifier, in particular to an asphalt modifier for traffic anti-rutting, as well as modified asphalt and asphalt mixture. 【Background technique】 [0002] At present, the production methods of asphalt are: 1) distillation method; 2) solvent deasphalting method; 3) oxidation method; 4) blending method and the combination of these four processes. Among them, the asphalt raw material "crude oil" of modified asphalt is best to choose Chinese crude oil as the main crude oil, whose characteristics are similar to naphthenic crude oil and intermediate base crude oil, and choose crude oil including paraffin base, naphthenic intermediate base, paraffin intermediate base, etc. as auxiliary crude. [0003] Among them, the road asphalt produced by using naphthenic crude oil can be realized by atmospheric and vacuum distillation because it conforms to the penetration of road asphalt, and some can be obtained by atmospheric disti...

AI Technical Summary

Problems solved by technology

[0053] In addition, there are modification methods such as polymers, fibers, and rubber powder; the limitations of traditional technologies: the addition amount is limited to 4-5%, which cannot fully meet the requirements of road use; 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

[0059] 4) "Code for Design of Asphalt Pavement JTJ014-97" emphasizes that there must be a layer of suspended 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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