A nano-composite modified high-strength durable concrete composition, and a preparation method and application thereof

By employing a synergistic reinforcement system of nano-silica, nano-titanium dioxide, and carbon nanotubes, combined with the dispersion mechanisms of hydrotalcite and polyvinylpyrrolidone, the limitations of nanoparticle dispersion and single-material modification have been overcome, resulting in concrete with high strength, excellent durability, and long-term stability, which is particularly suitable for tunnel and bridge engineering.

CN122102603APending Publication Date: 2026-05-29CHINA RAILWAY NO 5 ENGINEERING GROUP CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA RAILWAY NO 5 ENGINEERING GROUP CO LTD
Filing Date
2026-02-10
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies face challenges in modifying concrete with nanomaterials, such as the dispersion of nanoparticles and the limitations of single-material modification. This results in a decline in concrete performance rather than an improvement, failing to meet the high strength, excellent durability, and long-term stability requirements of tunnel and bridge engineering.

Method used

A synergistic reinforcement system of nano-silica, nano-titanium dioxide, and carbon nanotubes is adopted, combined with the synergistic dispersion mechanism of hydrotalcite and polyvinylpyrrolidone. The uniform dispersion of nanoparticles is achieved through physical adsorption and electrostatic repulsion, and the mechanical properties and durability of concrete are improved through multi-scale synergistic effects.

Benefits of technology

It significantly improves the 28-day compressive strength, flexural strength, freeze-thaw resistance, chloride ion penetration resistance, and long-term stability of concrete, making it suitable for tunnel and bridge engineering and extending the structural life.

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Abstract

The application discloses a kind of nano-composite modified high-strength durable concrete compositions and its preparation method and application.The concrete includes cementitious material, fine aggregate, coarse aggregate, nano-composite additive, water reducing agent, air entraining agent and water by weight parts.The nano-composite additive used includes nanometer silicon dioxide, nanometer titanium dioxide, carbon nanotube, hydrotalcite and polyvinylpyrrolidone component, and is made by ultrasonic dispersion process.The additive system realizes the high uniform dispersion and synergistic effect of nanoparticles in cement matrix, so that the obtained concrete has ultrahigh strength, excellent freeze-thaw resistance, chloride ion penetration resistance, acid erosion resistance and excellent long-term volume stability, and is especially suitable for tunnel, bridge and other engineering construction fields with extremely high durability requirements.
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