Lithium slag non-autoclaved aerated concrete and preparation method thereof

By using water glass and polyacrylamide in lithium slag-free aerated concrete to activate lithium slag, and using microwave curing to accelerate the hydration reaction, the problems of low activity and large water demand are solved, and the efficient utilization of lithium slag and the improvement of concrete performance are achieved.

CN119735422AActive Publication Date: 2025-04-01HUAXIN CEMENT CO LTD
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Patent Information

Application Number
CN202411982976.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-04-01
Estimated Expiration
2044-12-31

AI Technical Summary

Technical Problem

The application of lithium slag in building materials is limited by its low activity and large water demand, which leads to low lithium slag dosage, poor concrete performance, and low turnover efficiency of industrial production.

Method used

By adding water glass solution and polyacrylamide to the lithium slag-free aerated concrete, the alkali excitation effect of water glass is used to activate the lithium slag, and the hydration reaction is accelerated through microwave curing to improve the activity and resource utilization of lithium slag.

Benefits of technology

It realizes efficient utilization of lithium slag, improves the mechanical properties, drying and shrinking properties and thermal insulation properties of concrete, shortens the static stop and maintenance time, improves the turnover efficiency of industrial production, and has significant economic and environmental benefits.

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Abstract

The invention provides lithium slag non-autoclaved aerated concrete and a preparation method thereof. The lithium slag non-autoclaved aerated concrete is prepared from the following raw materials in parts by weight: 75-90 parts of lithium slag, 10-25 parts of cement, 20-35 parts of a water glass solution, 0.5-0.9 part of a physical foaming agent, 0.1-0.4 part of a water reducing agent, 0.02-0.2 part of polyacrylamide and a proper amount of water. The physical foaming agent, the water glass solution and the polyacrylamide are uniformly mixed to prepare foams, then the foams are added into a slurry solution obtained by mixing other raw materials, the materials are uniformly stirred to prepare finished slurry, then the finished slurry is subjected to casting molding and curing, the lithium slag non-autoclaved aerated concrete is obtained, and the water-solid ratio of the finished slurry is 0.3-0.35. Efficient utilization of the lithium slag can be achieved, and good mechanical properties are shown.
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