Concrete composition, concrete as well as preparation method and application of concrete

By combining the three-level coal gangue aggregate with gel materials and water reducing agents into concrete, the problem of poor performance of coal gangue aggregate concrete is solved, and the effects of high strength, durability and permeability are achieved, meeting the needs of complex construction conditions such as coal mine tunnels.

CN119707414APending Publication Date: 2025-03-28WUHAN PENGBO NEW MATERIALS TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202411815861.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-11
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

Coal gangue aggregate concrete contains impurities such as combustible materials, clay minerals and sulfides, which leads to its low strength, high water absorption and poor interfacial adhesion, which limits its application in high-performance concrete.

Method used

Three-grade coal gangue aggregate is used and combined with gel materials such as slag, gypsum and calcium carbide slag and water reducing agents to make concrete. Through synergistic efficiency, the strength, permeability, interface adhesion, durability, workability and crack resistance of the concrete are improved.

Benefits of technology

It significantly improves the comprehensive performance of concrete, including strength, durability and permeability, meets the needs of complex construction conditions such as coal mine tunnels, and reduces costs and environmental pollution.

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Abstract

The invention relates to a concrete composition, concrete as well as a preparation method and application of the concrete. The concrete composition comprises the following components: coal gangue aggregate, a gel material and a water reducing agent, the coal gangue aggregate comprises crushed coal gangue, a coarse coal gangue material and coal gangue stone powder, and the average particle size of the coarse coal gangue material is larger than that of the coal gangue stone powder and smaller than that of the crushed coal gangue; the gel material comprises slag, gypsum and carbide slag. According to the concrete composition, the coal gangue of different grades is adopted as the aggregate and compounded with the gel material and the water reducing agent to prepare the concrete, all the raw materials have a synergistic effect, the durability, workability, crack resistance and other performance of the concrete are improved, the production cost is reduced, and the requirement of coal mine construction for high-performance concrete is met.
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