A prefabricated asphalt brick based on asphalt pavement milling material and a preparation method thereof

By treating recycled asphalt mixtures with compound aromatic compounds and regenerators, and combining them with basalt fibers and a multi-component cementitious system, the problem of complex states of aged asphalt films in RAP was solved, the water immersion strength retention rate and durability of asphalt bricks were improved, and the densification and stability of the material were achieved, which facilitates industrial production.

CN121824060BActive Publication Date: 2026-06-09BEIJING AOK REAL DETECTION TECH DEVCO +2
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING AOK REAL DETECTION TECH DEVCO
Filing Date
2026-03-13
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies are unable to effectively address the challenges of varying RAP sources and complex aging asphalt film conditions, resulting in insufficient synergistic improvement in interface repair, bonding continuity, and long-term water damage resistance. Cold-prefabricated components are sensitive to pore structure and compaction uniformity, and their complex material systems or process paths hinder on-site engineering promotion and continuous industrial production.

Method used

Recycled asphalt mixtures are pretreated with compound aromatic compounds and recycling agents, combined with basalt fibers and a multi-component cementitious system, and formed into a continuous coating film and dense structure through staged compaction and vibration molding processes, thereby improving interfacial adhesion and durability.

Benefits of technology

It significantly enhances the water immersion strength retention and durability of asphalt bricks, reduces porosity and increases bulk density, and achieves material stability and replicability for industrial production.

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Abstract

The application discloses a kind of based on asphalt pavement milling material's prefabricated asphalt brick and its preparation method, belong to recycling technology field of renewable resources, the method includes: waste asphalt pavement is broken and is screened to obtain recycled asphalt mixture;First with regenerant, aromatic compound and basalt fiber dry mixing and standing activation;Again with cement, silica ash dry mixing;Subsequently, add water and polyacrylic acid sodium wet mixing mortar;In the state of stirring, add emulsified asphalt and mix to obtain mixing material;Finally, vibration forming, demolding curing prefabricated asphalt brick is prepared.Compared with prior art, by step mixing process and the synergistic effect of multiple functional components, high-mixing resource utilization of asphalt milling material is realized.The prefabricated asphalt brick prepared has a dense structure, high bulk density, high compressive strength and excellent water resistance, effectively solves the problem of milling material solid waste disposal, is economical and environmentally friendly, and is suitable for popularization and application.
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