Modified asphalt crack sealing material with shape memory function and preparation method thereof

By introducing components such as superelastic thermotropic shape memory polyurethane and epoxy resin into asphalt pavement materials, combined with specific process treatment, the problem of insufficient crack resistance and anti-aging performance in the existing technology is solved, and the excellent performance and long service life of the material at high and low temperatures is achieved.

CN119684812APending Publication Date: 2025-03-25WUYANG AOKAI MEDICAL TECH CO LTD
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Patent Information

Application Number
CN202510043263.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-10
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

While improving the high-temperature stability, water stability and self-healing properties of asphalt pavement materials, the prior art has failed to effectively improve the low-temperature crack resistance and anti-aging properties.

Method used

A modified asphalt crack sealing material is adopted, including No. 70 matrix asphalt, ultra-elastic thermo-shaped shape memory polyurethane, ultra-elastic thermo-shaped shape memory epoxy resin, styrene-butadiene-styrene block copolymer particles, carbon fiber, waste glue powder, inorganic nanolight calcium carbonate powder and sulfur powder, to form a material with shape memory function through specific heating and shearing treatment.

Benefits of technology

The material has good resistance to rut deformation at high temperatures, good dispersing stress and tensile capabilities at low temperatures, and still maintains good shape memory performance and road performance after aging, extending the service cycle.

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Abstract

The invention provides a modified asphalt crack sealing material with a shape memory function and a preparation method thereof, and belongs to the technical field of pavement crack repairing materials. Comprising the following raw materials in parts by weight: 30-50 parts of 70 # matrix asphalt, 10-20 parts of hyperelastic thermotropic shape memory polyurethane, 10-20 parts of hyperelastic thermotropic shape memory epoxy resin, 5-10 parts of styrene-butadiene-styrene block copolymer particles, 3-7 parts of carbon fibers, 5-15 parts of waste rubber powder, 3-7 parts of inorganic nano light calcium carbonate powder and 0.5-1 part of powdered sulfur. The invention provides a modified asphalt crack sealing material with a shape memory function and a preparation method of the modified asphalt crack sealing material. The modified asphalt crack sealing material realizes high shape memory property, excellent ageing resistance and low-temperature crack resistance of the material.
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