High-viscosity rubber modified asphalt and preparation method thereof

Through multi-component collaborative modification technology and staged shearing process, the storage stability and construction adaptability of rubber modified asphalt are solved, and the long-term homogeneous stability and excellent pavement performance of high-viscosity rubber modified asphalt is achieved. It is suitable for high-level road paving in heavy-duty traffic and extreme climates.

CN120484526APending Publication Date: 2025-08-15SUZHOU XUDONG CONSTR ENG CO LTD
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Patent Information

Application Number
CN202510607438.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-13
Publication Date
2025-08-15

AI Technical Summary

Technical Problem

During the production and use of conventional rubber modified asphalt, there are problems such as poor storage stability, excessive viscosity, increased difficulty in mixing and paving of mixtures, fire risk and glue powder dosage restrictions, and factory production and long-distance transportation cannot be achieved.

Method used

Multi-component collaborative modification technology of No. 70 matrix asphalt, graded vulcanized rubber powder, linear SBS polymer, C5 petroleum resin-type terpene resin, cycloalkane oil, polyisobutene modified nano zinc oxide and sulfur crosslinking stabilizer is adopted. Through preswelling, staged shearing and crosslinking stabilization treatment, a three-dimensional network structure is formed to improve the interface compatibility and storage stability between the rubber powder and the asphalt.

Benefits of technology

It significantly improves the storage stability and construction adaptability of rubber modified asphalt, extends the factory production and transportation cycle, improves the anti-aging performance and elastic recovery ability, reduces the problem of uneven paving disc wheels and void ratios, adapts to heavy-duty traffic and extreme climates, and promotes the efficient recycling of waste rubber resources.

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Abstract

The invention belongs to the technical field of asphalt processing, and discloses high-viscosity rubber modified asphalt and a preparation method thereof.The high-viscosity rubber modified asphalt is prepared from 70 # matrix asphalt, graded vulcanized rubber powder, a linear SBS polymer, C5 petroleum resin type terpene resin, cycloalkane oil, polyisobutene modified nano-zinc oxide and a sulfur cross-linking stabilizer; by combining a three-dimensional network structure formed by the cross-linking stabilizer, the layering risk caused by density difference is remarkably reduced, the factory production and transportation period is prolonged, the anti-aging performance is further improved through the synergistic effect of the nanometer material and vulcanization, the asphalt is endowed with better elastic recovery and anti-fatigue capacity, and the service life of the asphalt is prolonged. And the whole formula breaks through the limitation of the mixing amount of the traditional rubber powder, the fluidity of the mixture is optimized while the high viscoelastic characteristic is ensured, the problems of wheel sticking during paving and non-uniform void ratio are solved, the construction efficiency and the pavement durability are considered, and the efficient cyclic utilization of waste rubber resources is promoted.
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