Solid-waste-based high-strength phase-change lightweight aggregate as well as preparation method and application thereof

By combining raw materials such as cement, steel slag powder, ice chips, dry ice, and paraffin emulsion, a high-strength, stable solid waste-based phase change lightweight aggregate is prepared, solving the problems of complex preparation and high cost in existing technologies, and enabling its widespread application in industrial and civil buildings.

CN122344100APending Publication Date: 2026-07-07CHINA NORTHEAST ARCHITECTURAL DESIGN & RES INST CO LTD
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Patent Information

Application Number
CN202510015010.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-06
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing phase change building materials have complex and costly preparation processes, and traditional ceramsite carrier encapsulation technology is expensive and difficult to widely apply in industrial and civil buildings. Furthermore, there is limited research on high-strength phase change lightweight aggregates, which lack stability and strength.

Method used

High-strength phase change lightweight aggregate based on solid waste is prepared by using cement, steel slag powder, ice chips, dry ice, brick slag powder and paraffin emulsion as raw materials, through steps such as vacuum adsorption, pressing and molding and autoclaving. Ice chips and dry ice are used to create pores without liquid phase, and paraffin emulsion is used as a phase change material carrier. Organosilicon hydrophobic agent is combined to improve dispersibility and stability.

Benefits of technology

It achieves high-strength, stable phase change lightweight aggregate, reduces manufacturing costs, and broadens the application range. It is suitable for lightweight aggregate concrete, building blocks, and wall panels of C40 and above grades.

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to solid-waste-based high-strength phase-change lightweight aggregate as well as a preparation method and application thereof. The solid-waste-based high-strength phase-change lightweight aggregate provided by the invention is prepared from the following preparation raw materials in parts by mass: 26 to 32 parts of cement, 4 to 6 parts of steel slag powder, 32 to 36 parts of ice chips, 14 to 16 parts of dry ice, 12 to 16 parts of brick slag powder, 2.7 to 3.6 parts of paraffin emulsion and 0.3 to 0.4 part of organic silicon water repellent. Building solid waste brick slag is adopted to load paraffin emulsion to prepare phase change particles, cement and steel slag powder are adopted to react under the condition of ice chips and dry ice to form high-strength lightweight aggregate, meanwhile, the ice chips and the dry ice are adopted for normal-temperature pore forming, and the curing effect is improved; the obtained solid-waste-based high-strength phase-change lightweight aggregate realizes organic combination of a phase-change product and pure lightweight aggregate, has the characteristics of high strength, good stability and low manufacturing cost, and is a novel solid-waste-based energy-saving building material which is higher in quality grade and more convenient to apply.
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