A tubular scored fiber for use in a crack-resistant concrete pavement and a method of making the same

CN122446384APending Publication Date: 2026-07-24NINGBO SHIKE NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO SHIKE NEW MATERIAL TECH CO LTD
Filing Date
2026-04-30
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing fiber-reinforced materials for concrete floors suffer from problems such as a single crack-resistant mechanism, passive response mode, poor material compatibility, lack of repair function, and insufficient long-term durability, making them unable to effectively prevent and repair concrete cracks.

Method used

The three-level composite tubular scoring fiber, including a shape memory alloy core layer, a biomineralization intermediate layer and a self-healing outer shell layer, achieves intelligent response and self-healing through multi-level scoring structure and biomineralization reaction, combining the synergistic effect of shape memory effect, biomineralization deposition and self-healing materials.

Benefits of technology

It achieves a multi-level synergistic crack resistance mechanism, significantly improving the crack resistance and durability of concrete, with a crack repair rate of 92%, an interfacial bond strength increase of 45%, and a dosage of only 1 kg/m³ to achieve the effect of traditional fiber at 5 kg/m³, resulting in excellent workability.

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Abstract

The application discloses a special tubular notch fiber for crack resistance of a concrete floor and a preparation method thereof. The fiber is a three-level composite tubular structure, comprising a shape memory alloy core layer, a biomimetic mineralization intermediate layer and a self-repairing shell layer. The shape memory alloy core layer is a nickel-titanium-copper shape memory alloy, and the phase transition temperature is 30-50 DEG C. The biomimetic mineralization intermediate layer comprises urease and a calcium ion carrier. The self-repairing shell layer is a microcapsule-encapsulated epoxy resin-curing agent system, and the surface of the self-repairing shell layer is provided with multistage micro-nano notches. The tubular notch fiber can intelligently respond according to the crack development stage, and through the synergistic effect of multiple mechanisms such as shape memory effect, ion-induced mineralization, self-repairing release and mechanical anchoring, the multi-scale crack resistance from micro to macro is realized, and the crack resistance and durability of the concrete are significantly improved. Experiments show that the fiber starts repairing when the crack width is 0.1 mm, the repairing rate reaches 92% in 72 hours, and very good technical effects are achieved.
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Citation Information

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