Bio-based asphalt mixture modifier, preparation method and application

Abstract

The invention discloses a bio-based asphalt mixture modifier, a preparation method and an application. The method comprises steps as follows: heating a low-temperature-resistant agent to the temperature of 80-100 DEG C, and stirring a polyolefin material and the low-temperature-resistant agent at the constant speed for 1-2 min; sequentially adding antioxidants, novel bio-based filler and toner for blending, and stirring the mixture for 2-3 min at the stirring speed of 600-1000 r / min to form a mixture, wherein formula ranges of all the materials are as follows: 60-90% of the polyolefin, 10-30% of the novel bio-based filler, 0.1-0.6% of an antioxidant 01, 0.1-0.6% of an antioxidant 02, 0-10% of the low-temperature-resistant agent and 0.4-0.8% of the toner; adding the mixture into a twin-screw extruder through feeding equipment to be plasticized, sheared and molten into a uniform melt, pulling the melt into strips through a die, and shearing the strips into granules through a granulator. With the adoption of the method, needed machining processes when SBS modified asphalt is adopted are reduced, the quality problem of a pavement due to the fact that the SBS modified asphalt is separated easily is solved, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of pavement materials, in particular to a bio-based asphalt mixture modifier and its preparation method and application. Background technique [0002] As a continuous seamless pavement, asphalt pavement has the advantages of comfortable driving, low noise and easy maintenance. It has always been the main pavement type in developed countries, and it is also the main form of high-grade pavement in my country. However, at present, asphalt pavement has shortcomings such as high-temperature rutting, water damage, and low-temperature cracking. Generally, polymer-modified asphalt is used to solve the above problems and defects, and to achieve the purpose of prolonging the life of asphalt pavement. [0003] At present, SBS modified asphalt is the mainstream of modified asphalt because of its high and low temperature performance and good application effect. However, it has poor compatibility with asphalt, easy aging,...

AI Technical Summary

Problems solved by technology

At present, there are a large number of such products in the market, mainly anti-rutting agents, which can significantly improve the high-temperature performance of the road surface, but these products have the following defects: 1. Only improve the high-temperature and anti-rutting performance of the road surface, and the anti-water damage performance, The anti-cracking performance at low temperature has no promotion effect, and even has a reverse effect; 2. It is necessary to increase the oil-stone ratio of the original gradation, resulting in an increase in the cost of the pavement

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