A slow-release rust-proof negative carbon regenerated concrete material and its preparation method and application

By loading the rust resistor into the recycled concrete micro powder/agglomerate, and using wet carbonization to generate nano calcium carbonate and silica gel, the problems of insufficient durability of recycled concrete and high cost of rust resistor carrier in the prior art are solved, and efficient and durable sustained release rust-retardant carbon recycled concrete materials are achieved.

CN117142788BActive Publication Date: 2025-03-21HENAN ACADEMY OF SCIENCES
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Patent Information

Application Number
CN202311198070.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-18
Publication Date
2025-03-21
Estimated Expiration
2043-09-18

AI Technical Summary

Technical Problem

In the prior art, reinforced concrete structures have insufficient durability in a chloride-salt environment, and conventional rust resistors are quickly lost, interfering with cement hydration, and the carrier preparation cost is high and energy consumption is large, resulting in the recycled concrete being inferior to ordinary concrete in terms of mechanical properties and corrosion resistance.

Method used

Recycled concrete micropowder/aggregate is used as the rust inhibitor carrier, and the rust inhibitor is loaded into the recycled concrete material through soaking and wet carbonization to achieve a sustained release effect, and the material performance is enhanced by the formation of nano calcium carbonate and silica gel.

Benefits of technology

The compressive strength and durability of recycled concrete are improved, and the efficient utilization and sustained release of rust resistors are achieved. At the same time, the physical and mechanical properties of the concrete matrix are optimized, and the capture and utilization of CO2 are achieved.

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Abstract

The present invention relates to a slow-release rust-inhibiting negative carbon recycled concrete material and a preparation method and application thereof, and relates to the field of concrete technology. In view of the problems of high cost and high energy consumption in the preparation of rust-inhibiting molecular carriers, as well as the limitations of the recycled concrete modification method, the present invention provides a slow-release rust-inhibiting negative carbon recycled concrete material. The material preparation method is simple, and the recycled concrete material is loaded with a rust inhibitor and then subjected to a carbonization treatment. The rust-inhibiting concrete material of the present invention can not only avoid the direct effect of rust-inhibiting molecules on cement slurry to affect cement hydration, and then affect the physical and mechanical properties of the concrete matrix, but also enhance the performance of recycled aggregate / micropowder and the interface performance with fresh concrete, improve the performance and durability of recycled concrete, and realize CO2 capture and utilization, which has important application value.
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