A rubber asphalt modifier for enhancing asphalt performance and its application

Abstract

The invention discloses a rubber asphalt modifier for enhancing the performance of asphalt, which is made of the following raw materials in parts by mass: 20-30 parts of soft matrix asphalt, 57-68 parts of modified rubber powder, and modified gravel 15-25 parts of rock powder; both the modified rubber powder and the modified conglomerate powder are prepared by a double-cathode plasma sputtering method; the invention also discloses a preparation method of modified asphalt. After mixed with rubber asphalt modifier, modified asphalt can be obtained. The invention improves the dispersibility and compatibility of rubber asphalt modifier in asphalt by activating and modifying rubber powder and conglomerate powder, thereby improving the viscosity and softening point of asphalt, so that the asphalt has better high and low temperature Performance, elastic recovery performance and stability; the preparation method of the modified asphalt of the present invention is simple, and the prepared modified asphalt has the characteristics of high strength, good toughness, good water resistance, excellent temperature resistance and good fatigue resistance, and has broad application potential. Promote application prospects.

Description

technical field [0001] The invention belongs to the technical field of asphalt modifier preparation, and in particular relates to a rubber asphalt modifier for enhancing asphalt performance and its application. Background technique [0002] As of the end of 2017, the total mileage of highways across the country was 4.7735 million kilometers, of which 622,200 kilometers were secondary roads and above, of which asphalt roads accounted for the vast majority. At present, the national road maintenance mileage ratio is as high as 98%, and the road mileage that needs to be repaired and maintained every year is very large. Since most of the asphalt modifiers used in maintenance are imported, this increases the cost of the pavement from the raw material side. If a modifier can be formed, its components mainly use waste materials, and it is easy to obtain and can partially replace imported products. It is an effective promotion to reduce the cost of pavement and realize the recycling...

AI Technical Summary

Problems solved by technology

However, during the transportation of modified asphalt or rubber asphalt, due to the transportation distance and road conditions, segregation is easy to occur, resulting in poor stability of the asphalt

Especially when the rubber asphalt is preparing the mixture, due to the high viscosity of the rubber asphalt, the mixture will be mixed unevenly and the workability is poor.

These deficiencies will limit their use in the actual use of pavement

[0005] In the prior art, there are few studies on the activation of rubber powder, and the only few patents are mainly to improve the performance of rubber powder through external admixtures, and are mainly used in other fields, and there is no application in the field of road asphalt introduce

The activated rubber particles used in the field of road asphalt mainly consider the compatibility with asphalt and the simplicity of the process. How to improve the performance of asphalt and asphalt mixture without affecting the construction progress is less considered. The activator And the effect of compatibilizer on the bonding of asphalt and aggregates is not explained. Even if the modification performance of asphalt can be improved, if the performance of the mixture is limited, the scope of its applicability will be limited.

Images