Multi-dimensional nano-synergistically modified ultra-high-strength and ultra-high-toughness concrete and preparation method thereof

By doping zero-dimensional nano-SiO2 and one-dimensional CNTs into ultra-high performance concrete, the quality of hydration products and fiber-matrix bonding are improved, solving the problem of insufficient strength and toughness in ultra-high performance concrete and achieving a performance improvement of high strength and high toughness.

CN122403877APending Publication Date: 2026-07-17ARMY ENG UNIV OF PLA
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Patent Information

Application Number
CN202610563213.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-27
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing ultra-high performance concrete suffers from insufficient strength and toughness during actual service. Modification methods using single nanomaterials cannot fundamentally suppress internal defects and are also costly.

Method used

A multidimensional nano-synergistic modification method was adopted, which involves doping zero-dimensional nano-SiO2 and one-dimensional CNTs. By utilizing the pozzolanic effect of nano-SiO2 and the bridging effect of CNTs, the quality of hydration products inside concrete and fiber-matrix bonding were improved, thus preparing multidimensional nano-synergistic modified ultra-high strength and ultra-high toughness concrete.

Benefits of technology

It significantly improves the compressive strength, flexural strength and fracture toughness of concrete, avoids the agglomeration failure of nanomaterials, achieves high strength and high toughness construction adaptability, and its comprehensive performance far exceeds that of single nano-modified ultra-high performance concrete.

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Abstract

本发明公开了一种多维纳米协同改性超高强超高韧性混凝土及其制备方法，涉及纳米工程混凝土技术领域，其包括水泥、硅灰、纳米二氧化硅、碳纳米管、骨料、水、聚羧酸减水剂和钢纤维。本发明通过对超高性能混凝土内掺杂“零”维纳米SiO2和“一”维CNT，通过分散预处理，不仅提供更多水化产物的成核位点，而且充分发挥纳米SiO2的火山灰效应以及CNT的桥接效应；从纳米尺度改善混凝土内部的水化产物的质量、密实度及改善纤维‑基体粘结性，最终制备得到的硬化超高强超高韧性混凝土具有优异的抗压强度、抗折强度和断裂韧性。
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Citation Information

Patent Citations

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  • Nano-modified ultrahigh-toughness concrete and preparation method thereof

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