Asphalt mixture design method based on horizon function

By setting functional targets for different structural layers of highways, combining Bailey method and Superpave gradation optimization of aggregate gradation and asphalt content, and spraying special tack coat oil between layers, the problem of insufficient interlayer bonding strength was solved, achieving a synergistic effect of long pavement life and high performance.

CN121215076APending Publication Date: 2025-12-26江苏一诺路桥工程检测有限公司
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Patent Information

Application Number
CN202511151589.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-18
Publication Date
2025-12-26

AI Technical Summary

Technical Problem

Existing technologies cannot take into account the functional differences of different structural layers of highways, resulting in insufficient interlayer bonding strength, water damage, and problems such as high-temperature rutting and low-temperature cracking.

Method used

The design method of asphalt mixture based on layer function is adopted, and the functional objectives of the surface layer, intermediate layer and bottom layer are set respectively. The aggregate gradation and asphalt content are optimized by combining Bailey method and Superpave gradation, and special tack coat oil is sprayed between layers to improve the interlayer shear strength.

Benefits of technology

It achieves functional matching of each structural layer, improves the long service life and high performance of the pavement, increases the interlayer shear strength by 40%, and the service life of each layer reaches 12 to 30 years.

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Abstract

The invention provides a hierarchical mixture design index and optimization method according to functional requirements of different pavement layers (a surface layer, a middle surface layer and a lower surface layer) in combination with climate zoning and traffic load characteristics. According to the method, key mechanical parameters (the dynamic stability of a surface layer is greater than or equal to 6000 times / mm, and the low-temperature bending strain of a lower surface layer is greater than or equal to 2500 mu epsilon) are determined according to the horizon function, and then the mineral aggregate gradation and the special asphalt dosage are optimized through coupling analysis of volume parameters (the void ratio is 3%-5%, and the mineral aggregate void ratio is greater than or equal to 17%) and mechanical properties. And meanwhile, a bonding layer interface shear strength test (greater than or equal to 1.2 MPa) is introduced, so that the structural integrity is ensured.
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