Negative carbon lightweight aggregate concrete mix proportion design method and preparation method

By using bagasse biochar and solid waste wrapping technology in concrete mix design, carbon negative light aggregate was prepared, which solved the problem of insufficient carbon management in traditional concrete design and achieved the improvement of negative carbon emissions and mechanical properties of concrete , providing a new path for the low-carbon transformation of the construction industry.

CN119430771AActive Publication Date: 2025-02-14GUANGXI UNIV
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Patent Information

Application Number
CN202411746410.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-02
Publication Date
2025-02-14
Estimated Expiration
2044-12-02

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Abstract

The invention provides a negative carbon lightweight aggregate concrete mix proportion design method and a preparation method. The negative carbon lightweight aggregate concrete is prepared from the following components in parts by mass: 196 to 300 parts of negative carbon lightweight aggregate, 100 to 200 parts of regenerated sand, 30 to 50 parts of regenerated micro powder, 30 to 50 parts of Bayer red mud powder, 30 to 50 parts of slag, 1 to 3 parts of sodium hydroxide, 5 to 10 parts of water glass, 25 to 45 parts of water and 0.1 to 0.5 part of a water reducing agent. The carbon-loaded lightweight aggregate takes bagasse biochar as a core, and a shell material composed of regenerated micro powder, Bayer red mud powder and slag is wrapped outside the carbon-loaded lightweight aggregate, so that the strength is improved; according to the invention, the carbon-loaded lightweight aggregate is developed through bagasse biochar, and compared with traditional stone, the carbon emission is a negative value, and the advantage of low carbon is obvious. Meanwhile, carbon emission in the whole process is considered, the concrete mix proportion is designed by taking negative implicit carbon emission as a target, and building and industrial solid wastes are adopted as raw materials, so that the manufacturing cost is reduced, and resource waste is reduced.
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Citation Information

Patent Citations

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