公开(公告)号：US20240286965A1

公开(公告)日：2024-08-29

申请号：US18572588

申请日：2022-06-22

Applicant: HOLCIM TECHNOLOGY LTD

Inventor： Bruno HUET ,  Vincent BRIAUD ,  Vincent MEYER ,  Guillaume LOUBET ,  Christophe LEVY

IPC: C04B40/02 ,  B28B11/24 ,  C04B24/00 ,  C04B24/10 ,  C04B24/12 ,  C04B28/04 ,  C04B40/00 ,  C04B103/14 ,  C04B103/20

CPC classification number: C04B40/0236 ,  B28B11/245 ,  C04B24/003 ,  C04B24/10 ,  C04B24/121 ,  C04B24/123 ,  C04B28/04 ,  C04B40/0032 ,  C04B40/0281 ,  C04B2103/14 ,  C04B2103/20

Abstract: A method of preparation of a construction element by carbonation, includes a) preparing a composition containing a cement, water and chemical additives; b) pre-drying the composition; then c) placing the pre-dried composition in a chamber of an incubator, the chamber containing at least one inlet and one outlet, the pre-dried composition being carbonated, in a carbonation procedure, by feeding into the chamber, through the inlet, a flow of CO2 containing gas, variations of the CO2 concentration in the chamber being kept below 10% of a reference value during the whole carbonation procedure, during the carbonation procedure, the pressure within the chamber being atmospheric pressure, the relative humidity within the chamber being above 80° % and the temperature within the chamber ranging from 20° C. to 80° C. The chemical additives in the composition include more than 0.05% in weight, compared to the total weight of the cement, of a cement hydration retarder.