Reinforced pouring type semi-flexible pavement and construction method thereof

By adding modified magnetizable particles and anti-dispersant to the infused semi-flexible pavement, and using neodymium iron boron waste to provide a magnetic field, the magnetic adsorption effect is used to improve the bonding performance between asphalt and cement materials, the problem of easy interface cracks on the semi-flexible pavement is solved and the service life of the road is extended.

CN119711279AActive Publication Date: 2025-03-28TONGJI UNIV
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Patent Information

Application Number
CN202510075489.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-17
Publication Date
2025-03-28
Estimated Expiration
2045-01-17

AI Technical Summary

Technical Problem

Due to its high stiffness, the filling-type semi-flexible pavement is prone to cracking problems under the influence of driving loads, especially the interface cracks between asphalt and cement materials, which affect the service life of the road and restrict its promotion.

Method used

By adding modified magnetizable particles (Fe3O4) and anti-dispersant to the cement-based grouting material, and adding neodymium iron boron waste to the porous asphalt mixture, the bonding performance between the asphalt and cement material is significantly improved by using the magnetic adsorption effect to reduce the occurrence of interface cracks.

Benefits of technology

It significantly improves the filling rate of grouting materials, enhances the bonding performance of the interface between asphalt and cement materials, effectively reduces the occurrence of interface cracks, and extends the service life of semi-flexible pavements.

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Abstract

The invention provides a reinforced pouring type semi-flexible pavement and a construction method thereof, modified magnetic particle micron Fe3O4 (at) SiO2 mesoporous microspheres are doped into a cement-based grouting material, an anti-dispersing agent is doped, and the cement-based magnetic grouting material is prepared. Meanwhile, neodymium iron boron waste is doped into the porous asphalt mixture to serve as a magnetic material to provide a magnetic field, and when the cement-based magnetisable grouting material is injected into the porous asphalt mixture, the magnetic grouting liquid can move directionally and be adsorbed at fixed points under the action of the magnetic field by means of the magnetic adsorption effect; the grouting material for the semi-flexible pavement has the advantages that the filling rate of the grouting material is obviously improved, the bonding performance of an asphalt and cement material interface is obviously improved, the generation of interface cracks is effectively reduced, and the service life of the semi-flexible pavement is prolonged. The semi-flexible pavement cement provided by the invention has good compressive strength, breaking strength, tensile strength, bonding strength, fluidity, dry shrinkage rate and the like, and is an ideal base fluid as a cement-based magnetic grouting fluid.
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