A high-strength environmentally friendly concrete and its preparation method

By leveraging the synergistic effect of phosphate-grafted chitin nanocrystals and hyperbranched polyether interfacial coupling agents, the problems of slow early strength development and insufficient interfacial bond strength in concrete have been solved, achieving high-performance, high-strength, and environmentally friendly concrete, and improving early strength, fracture toughness, and long-term durability.

CN121735606BActive Publication Date: 2026-07-17GUANGZHOU PANYU BENDA CEMENT PROD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGZHOU PANYU BENDA CEMENT PROD CO LTD
Filing Date
2026-01-16
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing concrete technologies, when replacing cement, suffer from slow early strength development, fluctuating mechanical properties, and insufficient interfacial bond strength, making it difficult to achieve high performance. Furthermore, traditional nanomaterials are difficult to disperse, costly, and pose environmental risks.

Method used

By employing phosphate-grafted chitin nanocrystals and hyperbranched polyether interface coupling agents, through molecular design and synthesis, they synergistically act on a multi-component composite gelation system to achieve nanoscale reinforcement, interface bridging, and microstructure optimization, thereby improving early and late-stage strength, fracture toughness, and resistance to degradation.

Benefits of technology

While reducing cement usage, it significantly improves the early strength, fracture toughness, and resistance to degradation of concrete, enhances long-term durability and volume stability, and maintains environmental friendliness and ease of construction.

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Abstract

This invention belongs to the field of building materials, specifically relating to a high-strength, environmentally friendly concrete and its preparation method. The concrete mainly consists of sulfoaluminate cement, silica fume, granulated blast furnace slag, limestone powder, river sand, crushed stone, water-reducing agent, basalt fiber, and phosphate-grafted chitin nanocrystals and hyperbranched polyether interfacial coupling agent. The preparation method is as follows: first, the dry materials except for the fiber are mixed; then, the two modified compounds are added to the mixture after forming a suspension with water, and stirred to obtain a slurry; finally, the fiber is added and stirred evenly, followed by molding and curing to obtain the final product. This invention utilizes the synergistic effect of the two compounds: phosphate-grafted chitin nanocrystals effectively strengthen the matrix and promote hydration, while the hyperbranched polymer significantly improves interfacial adhesion and workability, thereby reducing environmental impact while endowing the concrete with high strength, high toughness, and excellent durability.
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