Bitumen modifier for traffic tracking resistance and modified bitumen and mixer thereof

Abstract

The invention discloses a pitch modifier for traffic anti-rut, modified asphalt and bituminous mixture, which is characterized by the following: allocating 20-200 wt thermoplastic elastomer ethenyl aromatic hydrocarbon-conjugated diene block copolymer and 5-950 wt polyolefin; setting the thermoplastic elastomer ethenyl aromatic hydrocarbon-conjugated diene block copolymer as SBS, SIS, SEBS and or SEPS; setting the polyolefin as PE, PP, EVA, APP, APAO, POE, HDPE, LDPE and or LLDPE; setting the mass percent of adding basic pitch at 1%-7%; increasing high-temperature behavior and anti-rut ability distinctively; modifying anti-water damage and anti-low temperature property. This craft is simple, which avoids the problem of bad stability of modified asphalt storage.

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

[0052] 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 requirements of road use; in addition, 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

[0058] 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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