High-amount recycled aggregate direct injection type asphalt mixture and preparation method thereof
By precisely controlling the amount of recycling agent added and designing the gradation of new and old asphalt, the problem of inaccurate recycling agent dosage in direct-injection asphalt mixtures with high-content recycled aggregate is solved, achieving a balance between high-temperature stability and low-temperature crack resistance, and ensuring the stability of road performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGSU WEIBAO NEW MATERIAL CO LTD
- Filing Date
- 2026-04-13
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies for direct-injection asphalt mixtures with high-content recycled aggregates, the dosage of recycling agents is not precisely controlled, resulting in poor recycling effect and road performance stability of the mixture, and failing to balance high-temperature stability and low-temperature crack resistance.
A strategy of precise control of the amount of recycling agent added is adopted, which is divided into four ranges according to the amount of recycled aggregate: 50%, 60%, 70% and 80%, with the amount of recycling agent added being 1.0 to 1.5 per thousand, 1.6 to 2.1 per thousand, 1.8 to 2.3 per thousand and 2.0 to 2.5 per thousand, respectively. Combined with the gradation design of new and old asphalt and heat treatment, the recycling agent is fully integrated with the old asphalt.
It achieves the best balance between high-temperature stability and low-temperature crack resistance in high-content recycled aggregate asphalt mixtures, ensuring stable road performance and avoiding performance degradation caused by insufficient or excessive recycling agents.
Smart Images
Figure CN122403841A_ABST