Base material and method for adsorbing and fixing carbon dioxide using base material

A base material using recycled concrete aggregates and acidic wet coating layers reacts with rainwater to fix carbon dioxide as calcium carbonate, addressing thermal energy consumption and alkalinity issues, achieving efficient and sustainable carbon dioxide absorption and fixation.

JP2025162743AActive Publication Date: 2025-10-28TOHO REO
4 Cites 0 Cited by

Patent Information

Application Number
JP2024066141
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-04-16
Publication Date
2025-10-28
Estimated Expiration
2044-04-16

AI Technical Summary

Technical Problem

Conventional carbon dioxide fixation technologies consume large amounts of thermal energy, emit carbon dioxide during production, require continuous forced carbon dioxide supply, and face challenges with using recycled aggregates due to residual concrete components and alkalinity issues.

Method used

A base material composed of recycled concrete aggregates and a wet coating layer with naturally occurring acidic substances and adhesion aids, which reacts with atmospheric carbon dioxide in rainwater to form calcium carbonate, adsorbing and fixing carbon dioxide without thermal energy, while utilizing recycled concrete fine powder as a carbon dioxide carrier.

Benefits of technology

The base material efficiently adsorbs and fixes carbon dioxide semi-permanently, improves vegetation environments by maintaining pH balance, and contributes to green infrastructure by using recycled materials without heat treatment, thus reducing environmental impact and enhancing landscape and microclimate.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

To provide a base material and a method for adsorbing and fixing carbon dioxide using the base material which can semi-permanently adsorb and fix carbon dioxide onto the base material in the soil without using any thermal energy at all and solely through natural forces.SOLUTION: A base material 10 buried in the soil and used as a filler or backfill material to prevent clogging, the base material comprising a hard aggregate body 20, a wet coating layer 30 that coats the surface of the aggregate body 20 and is configured by a naturally derived wetting substance 31 having a function of adsorbing and fixing carbon dioxide, a function of capturing SS substances and an acidic functional group having at least a pH buffering action, and an adhesion promoting agent 32 exhibiting viscosity when wet and causing the wetting substance 31 to adhere to the surface of the aggregate body 20, and recycled concrete fine powder 33 that is adhered to the surface of the aggregate body 20 or the wet coating layer 30 and is a carrier for carbon dioxide.SELECTED DRAWING: Figure 4
Need to check novelty before this filing date? Find Prior Art