A lightweight autoclaved aerated concrete block

By optimizing the raw material ratio and preparation process of lightweight autoclaved aerated concrete blocks, a porous structure with high closed-cell ratio is formed, which solves the problems of insufficient strength and poor durability of existing blocks and achieves improved high compressive strength, impermeability and crack resistance.

CN121517175BActive Publication Date: 2026-06-23YANAN WANSHENG NEW BUILDING MATERIALS CO LTD
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Patent Information

Application Number
CN202511910020.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-12-17
Publication Date
2026-06-23
Estimated Expiration
2045-12-17

AI Technical Summary

Technical Problem

Existing lightweight autoclaved aerated concrete blocks have insufficient compressive strength, weak impact and wear resistance, poor durability due to their porous structure, and are prone to water absorption, softening, and weathering, making them unsuitable for high-load buildings.

Method used

Using a specific ratio of raw materials such as cement, lime, modified palygorskite, aluminum powder paste, and foam stabilizer, and through mixing, vibration molding, and autoclaving processes, a porous structure with a high closed-cell rate is formed, which enhances the impermeability and overall strength of the blocks.

Benefits of technology

It significantly improves the compressive strength, impermeability and crack resistance of the blocks, reduces the drying shrinkage rate, and extends the service life.

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Abstract

The application discloses a light autoclaved aerated concrete block and relates to the technical field of concrete blocks.The light autoclaved aerated concrete block comprises the following raw materials: cement, lime, base material, modified palygorskite, calcium sulfate dihydrate, aluminum paste, foam stabilizer and deionized water.In the application, the fibrous structure of the modified palygorskite can form a network framework in the slurry, fill the internal pores and block the capillary channels, so that the overall structural compactness and surface strength of the block are improved, and the drying shrinkage and water absorption are reduced.The alkyl benzene sulfonic acid sodium in the foam stabilizer can reduce the surface tension of the slurry and promote the generation of a large number of bubbles.Nano silicon dioxide can form a rigid support framework in the bubble liquid film to prevent the bubbles from merging or breaking.Polyvinyl alcohol forms an elastic protective film on the bubble surface, prolongs the bubble life, greatly improves the block closed porosity, guarantees the light weight of the block, reduces the drying shrinkage due to the uniformity of the pores, and improves the impermeability and overall strength.
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