Bituminous mixture modifier and preparation method thereof

Abstract

The invention discloses a bituminous mixture modifier and a preparation method thereof. The bituminous mixture modifier is prepared from waste polyethylene, waste polypropylene, a toughening agent, aninitiator, a modifier, an anti-ageing agent, filler and pigment. According to the bituminous mixture modifier and the preparation method thereof, by adopting modification technologies of blending, grafting, toughening and the like, the industrial, agricultural and domestic recovered waste PE and PP, the other modifier, the filler and the like are mixed evenly according to a certain ratio to prepare black solid particles, according to 0.3-0.5% of total mass of a bituminous mixture, the black solid particles, pitch and mineral aggregate are stirred and mixed evenly at a mixing station under technology conditions of certain temperature, mixing time and the like, thus paving can be conducted, the rut resistance capability of a bituminous pavement can be greatly improved, and meanwhile, both the moisture damage resistance performance and the low temperature resistance performance are obviously improved. By adopting the modification technologies, not only is the cost reduced, but also the high temperature stability of the bituminous mixture can be greatly improved, the foreign technology monopoly is broken, and the bituminous mixture modifier and the preparation method thereof have profound significance in the aspects of positively responding to national waste material resource recycling and the like.

Description

technical field [0001] The invention relates to an asphalt mixture modifier and a preparation method thereof, belonging to the field of asphalt mixture modification. Background technique [0002] With the increase of traffic volume, the increase of axle load and the channelization of traffic, asphalt pavement rutting is the most important damage phenomenon in the early stage of expressway. Rutting is a form of damage to asphalt pavement, which is manifested as the depression of the road surface within the range of the asphalt pavement wheel track, sometimes accompanied by the uplift of the edge of the wheel track. This phenomenon is mainly due to the compaction and shear deformation of the asphalt mixture on the pavement caused, and usually occurs in the surface layer. Compared with cracking and water damage, rutting not only seriously affects the service level of the pavement, significantly reducing the service life of the pavement, but also is very difficult to repair. T...

AI Technical Summary

Problems solved by technology

[0004] The literature reports at home and abroad mainly focus on the anti-rutting agent processed by single waste PE or compounded with other raw materials to modify asphalt mixture. Poor rutting resistance

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