Process for producing concrete using construction waste

By combining alternating thermal stress field and shock wave treatment with density sorting and surface shaping, the problem of separating old mortar from natural aggregates is solved, and high-quality recycled aggregates are produced, which broadens their application range and reduces dependence on natural sand and gravel resources.

CN122380698APending Publication Date: 2026-07-14TONGREN ZHONGXIN LVDA ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TONGREN ZHONGXIN LVDA ENVIRONMENTAL PROTECTION TECH CO LTD
Filing Date
2026-04-03
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

The old mortar layer of existing recycled concrete is difficult to completely separate from natural aggregates, resulting in poor quality of the prepared recycled aggregates and limiting their application in structural engineering.

Method used

By applying a combination of alternating thermal stress field and shock wave treatment, the difference in thermophysical properties between old mortar and natural aggregate is utilized to form microscopic damage and peel off the old mortar. Combined with density difference sorting and surface shaping treatment, high-quality recycled aggregate is obtained.

Benefits of technology

This process produces high-quality recycled aggregates with clean surfaces and low porosity, broadening their application range, reducing reliance on natural sand and gravel resources, and realizing high-value utilization of construction waste.

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Abstract

The application provides a process for producing concrete by recycling construction waste, and relates to the technical field of building material production, and comprises the steps of raw material crushing and screening, thermal stress pretreatment, separation treatment, differential sorting, surface treatment and concrete configuration; an alternating thermal stress is applied through microwave intermittent irradiation, micro-damage is formed by using the difference in thermal physical properties between old mortar and natural aggregate, the old mortar is stripped through resonance frequency and high-energy shock waves, and high-quality recycled aggregate is obtained after wet separation and shaping, and finally, recycled concrete is prepared. The process can efficiently separate the old mortar from the natural aggregate, improve the quality of the recycled aggregate, broaden the application range of construction waste resource utilization, reduce the exploitation of natural sand and stone, and realize high-value utilization of construction waste.
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