Phase-change recycled aggregate, preparation method thereof and anti-freezing water-stable material

By filling the porous decoration garbage aggregate with organic phase change materials and wrapping them with cement slurry, the phase change regenerated aggregate is formed, which solves the problems of high water absorption and poor freezing resistance, and achieves higher strength and durability.

CN120172668APending Publication Date: 2025-06-20BCEG RESOURCES RECYCLING CO LTD
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Patent Information

Application Number
CN202510463698.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-14
Publication Date
2025-06-20

AI Technical Summary

Technical Problem

The existing phase change regenerated aggregate has high water absorption rate and poor freezing resistance, which limits its durability and effectiveness in resource-based applications.

Method used

The porous decoration garbage aggregate structure and organic phase change materials are used to treat and cure through liquid phase infiltration and cooling, fill the pores of the aerated concrete aggregate, and wrap and encapsulate them with cement slurry to form phase change regenerated aggregate.

Benefits of technology

It significantly reduces the water absorption rate of phase-transform regenerated aggregate, improves its strength and frost resistance under low temperature conditions, extends the effective hydration time of cement, and enhances the durability of its resource-based applications.

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Abstract

The invention relates to the technical field of building materials, in particular to phase-change recycled aggregate, a preparation method thereof and an anti-freezing water-stable material. The phase-change recycled aggregate comprises a base material and a packaging layer coating the surface of the base material, the base material comprises a porous decoration waste aggregate structure and an organic phase-change material, and the organic phase-change material is located in gaps of the porous decoration waste aggregate structure; the porous decoration waste aggregate structure comprises aerated concrete aggregate; the encapsulation layer includes a first cementitious material. According to the invention, the phase-change material is used for infiltrating and filling holes in the surface of the aerated concrete aggregate, and then the cement paste is used for wrapping and packaging, so that the reinforcement of the recycled aggregate is completed, the water absorption of the recycled aggregate is reduced, the phase-change material is packaged in the aggregate, and the separation loss of the recycled aggregate is reduced; the high-temperature heat absorption and low-temperature heat release performances of the organic phase-change material are utilized to relieve the stress damage of temperature impact to the internal structure, so that the heat preservation period during winter construction can be prolonged, and the effective hydration time of the cement can be prolonged.
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