KR-20260062681-A - Manufacturing Method of Concrete with Lithium Carbonate of Waste Lithium-ion Battery

KR20260062681AKR 20260062681 AKR20260062681 AKR 20260062681AKR-20260062681-A

Abstract

By developing a technology to recycle lithium carbonate recovered from waste batteries as a component of concrete, a construction material, and by applying lithium carbonate recovered from waste lithium-ion batteries through wet and carbonation processes as a component of concrete to manufacture concrete with excellent durability and wear resistance, it is possible to reduce environmental pollution caused by the landfilling and disposal of waste batteries, secure economic viability through waste recycling, and achieve carbon reduction.

Inventors

김대건

Assignees

동서대학교 산학협력단

Dates

Publication Date: 20260507
Application Date: 20241029

Claims (4)

Step (a) of preparing a mixture by dry-mixing ready-mix mortar and coarse aggregate for 1 to 4 minutes; Step (b) of preparing a mixed solution by mixing water and an admixture; Step (c) of preparing concrete by adding a mixed solution of water and admixture to the mixture of ready-mix mortar and coarse aggregate and stirring for 3 to 10 minutes so that the material does not settle or sink; and A step (d) comprising adding lithium carbonate recovered from waste batteries to the concrete and stirring for 3 to 10 minutes, Method for manufacturing concrete using recycled lithium carbonate from waste batteries.
In Article 1, The above ready-mix mortar comprises cement and fine aggregate, and is characterized in that the content (S/a) of the fine aggregate relative to the total aggregate, which is the sum of the fine aggregate and the coarse aggregate, is 35 to 55 weight%. Method for manufacturing concrete using recycled lithium carbonate from waste batteries.
In Article 1, The above water content (W/B) is 20 to 30 weight% with respect to the binder comprising the cement and the admixture, the admixture is fly ash that increases the workability of the concrete and reduces material segregation, and the fly ash content is 0.5 to 1 weight% with respect to the cement, characterized in that Method for manufacturing concrete using recycled waste batteries.
In Article 1, The lithium carbonate is manufactured by carbonating an aqueous lithium solution produced from spent lithium-ion batteries through a wet process, and is characterized in that the content of the lithium carbonate relative to the concrete is 0.05 to 0.1 weight%. Method for manufacturing concrete using recycled waste batteries.

Description

Manufacturing Method of Concrete with Lithium Carbonate of Waste Lithium-ion Battery The present invention relates to a method for recycling lithium carbonate recovered from waste batteries as a component of concrete, and more specifically, to a method for manufacturing concrete with excellent durability and wear resistance by using lithium carbonate recovered from waste lithium-ion batteries through a wet process as a component of concrete. This project (output) is the result of research conducted under the Phase 3 LINC 3.0 Leading University-Industry Cooperation Project, funded by the Ministry of Education and the National Research Foundation of Korea. Due to rapid changes in the automotive market, the production of electric vehicles is surging, and the generation of waste batteries is increasing because automotive batteries have a fast product cycle. The Korea Energy Economics Institute projected that the number of scrapped electric vehicles will increase to 560,000 in 2025 and grow by an annual average of 33% thereafter, reaching 42.27 million after 2040, with the total projected to reach approximately 80,000 by 2029. In addition, the Ministry of Environment announced the BEST Roadmap regarding recycling methods and standards for waste electric vehicle batteries. Accordingly, continuous attempts are being made to reuse and recycle waste batteries not only to prevent environmental pollution and reduce the risk of safety accidents, but also to extract and recycle key battery raw materials such as lithium and nickel. However, to date, the majority of waste batteries are recycled into industrial products, and there is currently no recycling process in place for the construction industry. In particular, lithium carbonate is reported to be able to improve the durability and impermeability of concrete by promoting early strength development and shortening the setting time as a concrete accelerator, and to increase the fire resistance of building materials and reduce the occurrence of fire accidents as a flame retardant. In addition, valuable metals such as lithium and manganese can be recovered through the leaching process and the separation and recovery process in the wet recycling process of waste batteries. Accordingly, the present invention has developed a method for manufacturing concrete with excellent durability and wear resistance by recycling lithium carbonate recovered from the above-mentioned waste battery through a carbonation process as a concrete component. Figure 1 is a diagram showing the process flow of a method for manufacturing lithium carbonate concrete. Figure 2 is a diagram showing the drying shrinkage characteristics of lithium carbonate concrete. Figure 3 is a diagram showing the chloride penetration resistance characteristics of lithium carbonate concrete. Figure 4 is a diagram showing the wear resistance of lithium carbonate concrete. The method for manufacturing concrete using recycled lithium carbonate from waste batteries according to the present invention will be described in detail below with reference to the attached drawings. The drawings presented below are provided as examples to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. Unless otherwise defined, technical and scientific terms used herein have the meaning commonly understood by those skilled in the art to which this invention pertains, and descriptions of known functions and configurations that could unnecessarily obscure the essence of the invention are omitted in the following description and accompanying drawings. The method for manufacturing concrete using recycled lithium carbonate from waste batteries according to the present invention comprises the steps of: (a) preparing a mixture by dry-mixing ready-mix mortar and coarse aggregate for 1 to 4 minutes; (b) preparing a mixing solution by mixing water and an admixture; (c) manufacturing concrete by adding the mixing solution of water and the admixture to the mixture of ready-mix mortar and coarse aggregate and stirring for 3 to 10 minutes so that the material does not settle or sink; and (d) adding lithium carbonate recovered from waste batteries to the concrete and stirring for 3 to 10 minutes (Fig. 1). First, the present invention includes a step of preparing a mixture by dry-mixing ready-mix mortar and coarse aggregate for 1 to 4 minutes. The ready-mix mortar comprises cement and washed sand as fine aggregate, and the coarse aggregate may be artificial crushed stone with a particle size of 20 mm. Additionally, the content of the fine aggregate (S/a) relative to the total aggregate (the sum of the fine aggregate and the coarse aggregate) may be 35 to 55 weight%, preferably 40 to 50 weight%, and more preferably 45 weight%. If the S/a value is too small, the amount of coarse aggregate increases,