A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
AGGREGATE AND METHOD FOR PRODUCING THE SAME
To provide an aggregate in which carbon dioxide in an atmosphere is sufficiently absorbed, and a method for producing the aggregate in which the carbon dioxide in the atmosphere is sufficiently absorbed.SOLUTION: An aggregate of the present invention has: 1. a coating layer containing granulating agent and cement on a part or all of the surface, where the specific surface area is 2.0 cm2/g or more; or 2. a coating layer containing cement on a part or all thereof, where the specific surface area is 2.0 cm2/g or more, a specific surface area of a fraction passing through a sieve with a nominal aperture of 4.75 mm as specified in JIS Z 8801-1:2019 is 2.5 cm2/g or greater, and a specific surface area of a fraction remaining on the sieve is 0.5 cm2/g or greater. A method for producing the aggregate includes: a granulation step of mixing fresh concrete or fresh concrete sludge water with the granulating agent to obtain a granulated material; and a curing step of exposing the granulated material to an atmosphere containing carbon dioxide to cause the granulated material to absorb carbon dioxide to obtain the above aggregate, where a specific surface area of the granulated material is 2.0 cm2/g or more.SELECTED DRAWING: None
【課題】大気中の二酸化炭素を十分に吸収した骨材、及び、大気中の二酸化炭素を十分に吸収した骨材の製造方法を提供する。【解決手段】本発明の骨材は、１．表面の一部又は全部に、造粒剤とセメントとを含む被覆層を有し、比表面積は２．０ｃｍ２／ｇ以上であり、又は、２．表面の一部又は全部に、セメントを含む被覆層を有し、比表面積は２．０ｃｍ２／ｇ以上であり、ＪＩＳ Ｚ ８８０１－１：２０１９に規定される公称目開き４．７５ｍｍのふるいを通過する画分の比表面積は２．５ｃｍ２／ｇ以上、該ふるいにとどまる画分の比表面積は０．５ｃｍ２／ｇ以上である。本発明の骨材の製造方法は、生コンクリート又は生コンクリートスラッジ水と造粒剤とを混合して、造粒物を得る造粒工程と、該造粒物を、二酸化炭素を含む雰囲気に曝露し、該造粒物に二酸化炭素を吸収させて、上記骨材を得る養生工程とを有し、該造粒物の比表面積は２．０ｃｍ２／ｇ以上である。【選択図】なし
AGGREGATE AND METHOD FOR PRODUCING THE SAME
To provide an aggregate in which carbon dioxide in an atmosphere is sufficiently absorbed, and a method for producing the aggregate in which the carbon dioxide in the atmosphere is sufficiently absorbed.SOLUTION: An aggregate of the present invention has: 1. a coating layer containing granulating agent and cement on a part or all of the surface, where the specific surface area is 2.0 cm2/g or more; or 2. a coating layer containing cement on a part or all thereof, where the specific surface area is 2.0 cm2/g or more, a specific surface area of a fraction passing through a sieve with a nominal aperture of 4.75 mm as specified in JIS Z 8801-1:2019 is 2.5 cm2/g or greater, and a specific surface area of a fraction remaining on the sieve is 0.5 cm2/g or greater. A method for producing the aggregate includes: a granulation step of mixing fresh concrete or fresh concrete sludge water with the granulating agent to obtain a granulated material; and a curing step of exposing the granulated material to an atmosphere containing carbon dioxide to cause the granulated material to absorb carbon dioxide to obtain the above aggregate, where a specific surface area of the granulated material is 2.0 cm2/g or more.SELECTED DRAWING: None
【課題】大気中の二酸化炭素を十分に吸収した骨材、及び、大気中の二酸化炭素を十分に吸収した骨材の製造方法を提供する。【解決手段】本発明の骨材は、１．表面の一部又は全部に、造粒剤とセメントとを含む被覆層を有し、比表面積は２．０ｃｍ２／ｇ以上であり、又は、２．表面の一部又は全部に、セメントを含む被覆層を有し、比表面積は２．０ｃｍ２／ｇ以上であり、ＪＩＳ Ｚ ８８０１－１：２０１９に規定される公称目開き４．７５ｍｍのふるいを通過する画分の比表面積は２．５ｃｍ２／ｇ以上、該ふるいにとどまる画分の比表面積は０．５ｃｍ２／ｇ以上である。本発明の骨材の製造方法は、生コンクリート又は生コンクリートスラッジ水と造粒剤とを混合して、造粒物を得る造粒工程と、該造粒物を、二酸化炭素を含む雰囲気に曝露し、該造粒物に二酸化炭素を吸収させて、上記骨材を得る養生工程とを有し、該造粒物の比表面積は２．０ｃｍ２／ｇ以上である。【選択図】なし
AGGREGATE AND METHOD FOR PRODUCING THE SAME
骨材及びその製造方法
NOGUCHI TAKAFUMI (author) / SHIRAIWA SEISHI (author) / DOI MASAHIRO (author)
2024-05-27
Patent
Electronic Resource
Japanese
CERAMIC AGGREGATE FOR REFRACTORIES AND METHOD FOR PRODUCING SAME
| European Patent Office | 2015