Red mud-based asphalt modifier, preparation method and application thereof
By using acid activation and modification with phytic acid and octadecylamine, the problem of poor compatibility between red mud and asphalt was solved, achieving stable dispersion and performance improvement of red mud in asphalt, enhancing the high-temperature stability and deformation resistance of asphalt, which is in line with the concept of green chemistry.
CN122325847APending Publication Date: 2026-07-03GUANGXI UNIV
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGXI UNIV
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-03
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Figure CN122325847A_ABST
Abstract
This invention discloses a red mud-based asphalt modifier, its preparation method, and its application, relating to the field of solid waste modified asphalt technology. The preparation method of the red mud-based asphalt modifier mainly includes three core steps: acid activation and structural reconstruction, phytic acid surface chelation functionalization, and octadecylamine hydrophobic grafting. This invention can simultaneously optimize the pore structure of red mud, activate surface chemical activity, and reverse surface wettability. The red mud-based asphalt modifier of this invention not only has excellent asphalt compatibility but also adsorbs light components in asphalt through its porous structure and forms physical entanglement between long-chain organic molecules on its surface and asphalt components, thereby improving the mechanical properties of asphalt.
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