A kind of factory-mixed hot recycled asphalt mixture and preparation method thereof

By using new materials such as composite regenerators and three-dimensional porous materials in the factory-mixed hot regenerated asphalt mixture, the problems of insufficient stability, fatigue resistance, slip resistance and sound absorption of the mixture are solved, and the stability of high-temperature, low-temperature and water are improved and the resistance of slip resistance and sound absorption performance are enhanced.

CN119750956APending Publication Date: 2025-04-04GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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Patent Information

Application Number
CN202411792327.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-06
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

The stability, fatigue resistance, slip resistance and sound absorption of the factory-mixed hot regenerated asphalt mixture limits its promotion and application of high RAP dosage.

Method used

New materials such as composite regenerating agents and three-dimensional porous materials are used to prepare a factory-mixed heat-regenerated asphalt mixture with improved asphalt structural strength and mechanical properties through process steps such as heating and stirring.

Benefits of technology

It significantly improves the high-temperature stability, low-temperature stability and water stability of the thermally regenerated asphalt mixture, enhances the anti-slip and sound absorption properties, and enables the mixing of milling materials to reach more than 85%, saving economic costs.

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Abstract

The invention discloses a factory-mixed hot-regenerated asphalt mixture. The raw materials of the mixture include the following components in parts by weight: 80-90 parts of old SBS asphalt mixture, 4-8 parts of asphalt, 10-20 parts of aggregate, 2-6 parts of mineral powder, 1-3 parts of polyvinyl chloride powder, 1-3 parts of warm mix agent, and 1-3 parts of composite regeneration agent; the raw materials of the composite regeneration agent include in parts by weight 90-110 parts of furfural extracted oil, 5-10 parts of triallyl isocyanurate, 2-6 parts of triethoxysilane, 4-10 parts of three-dimensional porous material, 3-8 parts of penetrant, 20-30 parts of toluene-2,4-diisocyanate, 10-20 parts of terminal hydroxyl polybutadiene, 5-12 parts of plasticizer, and 5-10 parts of tackifier; the hot-regenerated asphalt mixture has enhanced high-temperature stability, low-temperature stability and water stability, and has good anti-skid performance and sound absorption performance. In the application of the factory-mixed hot-regenerated asphalt mixture engineering, the mixing amount of milling material can reach more than 85%, thereby saving economic cost.
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