Reclaimed rubber powder modified asphalt based on renewable composite activator as well as preparation method and application of reclaimed rubber powder modified asphalt
By improving the surface polarity and interfacial affinity of waste rubber powder with composite activators, the problems of poor dispersibility and insufficient anti-aging properties of waste rubber powder in asphalt are solved, thereby improving the high-temperature storage stability and anti-aging properties of modified asphalt.
CN122080658AActive Publication Date: 2026-05-26TONGJI UNIV
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Patent Information
- Application Number
- CN202610549929.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-24
- Publication Date
- 2026-05-26
- Estimated Expiration
- 2046-04-24
AI Technical Summary
Technical Problem
Waste rubber powder exhibits poor dispersibility, weak interfacial compatibility, poor storage stability, and insufficient anti-aging properties in asphalt, which affects the engineering application of the material.
Method used
A composite activator composed of chitosan-amino acid derivatives and layered bimetallic hydroxides is used. Surface treatment improves the polarity and interfacial affinity of the adhesive powder, forming a uniform composite system.
Benefits of technology
It significantly improves the dispersibility and interfacial compatibility of rubber powder in base asphalt, enhances the storage stability and anti-aging properties of modified asphalt, and has good high-temperature rutting resistance.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention belongs to compositions of high-molecular compounds, and relates to regenerated rubber powder modified asphalt based on a renewable composite activator and a preparation method and application thereof.The regenerated rubber powder modified asphalt comprises matrix asphalt and activated rubber powder according to the mass ratio of 1: (0.2-0.3), and the activated rubber powder comprises waste tire rubber powder and the composite activator according to the mass ratio of 10: (0.8-1.5); the composite activator comprises an organic phase and an inorganic phase according to a mass ratio of (1.5-3): 1, the organic phase is a chitosan-amino acid derivative, and the inorganic phase is layered bimetal hydroxide. Compared with the prior art, the rubber powder modified asphalt prepared by the invention has good high-temperature storage stability and interface structure integrity, and shows excellent aging resistance and high-temperature rutting resistance in a long-term service process.
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