High-viscosity modified emulsified asphalt, preparation method and application thereof

By synergistically modifying asphalt with SEBS and SBR, combining high-melting-point maleic anhydride grafted wax and phosphoric acid to adjust the acid value, and adding polyacrylamide stabilizer, the problems of emulsification difficulty and storage stability of high-viscosity modified emulsified asphalt were solved, the dynamic viscosity at 60℃ and low-temperature performance were improved, and the bonding effect with the original pavement was enhanced.

CN122168040APending Publication Date: 2026-06-09ZHEJIANG JIAOGONG HIGHWAY MANTAINANCE +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG JIAOGONG HIGHWAY MANTAINANCE
Filing Date
2026-03-18
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

High-viscosity modified emulsified asphalt has excessively high viscosity at 170-175℃, making emulsification difficult, resulting in poor emulsification effect and poor storage stability. Its dynamic viscosity at 60℃ does not increase significantly, and its bonding effect with the original pavement is poor at service temperature.

Method used

SEBS and SBR are used to synergistically modify asphalt, combined with high-melting-point maleic anhydride grafted wax and phosphoric acid to adjust the acid value. High-viscosity modified emulsified asphalt is formed by shearing. Polyacrylamide stabilizer is added to form a network structure to improve emulsification effect and storage stability.

Benefits of technology

It reduces high-temperature viscosity, increases dynamic viscosity at 60℃, improves low-temperature performance, enhances the workability and storage stability of emulsified asphalt, and strengthens its adhesion to the original road surface.

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Abstract

The application discloses high-stickiness modified emulsified asphalt as well as a preparation method and application thereof. The high-stickiness modified emulsified asphalt comprises high-stickiness modified asphalt and a soap solution of the emulsified high-stickiness modified asphalt. The high-stickiness modified asphalt comprises, in terms of mass fractions, 35.0-45.0 parts of base asphalt, 5.0-6.0 parts of SEBS, 5.0-6.0 parts of SBR, 1.0-2.0 parts of maleic anhydride grafted wax, 1.5-2.0 parts of rubber oil and 0.1-0.2 parts of sulfur. The soap solution comprises, in terms of mass fractions, 1.0-1.5 parts of an emulsifier, 1.5-2.5 parts of phosphoric acid and 35.0-45.0 parts of water. The high-stickiness modified emulsified asphalt is prepared by optimizing raw materials and a formula, reduces the high-temperature viscosity of high-stickiness asphalt, solves the emulsification difficulty, and has corresponding improvement in normal-temperature performance and storage stability of the asphalt, thereby improving the performance of the high-stickiness modified emulsified asphalt and products.
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