	US 11,680,015 B2
	CO₂solidified fiber cement board and its preparation method
Fazhou Wang, Wuhan (CN); Zhichao Liu, Wuhan (CN); Shuguang Hu, Wuhan (CN); and Lu Yang, Wuhan (CN)
Assigned to WUHAN UNIVERSITY OF TECHNOLOGY, Wuhan (CN)
Filed by WUHAN UNIVERSITY OF TECHNOLOGY, Wuhan (CN)
Filed on Aug. 16, 2022, as Appl. No. 17/888,536.
Claims priority of application No. 202111150020.3 (CN), filed on Sep. 29, 2021.
Prior Publication US 2023/0101697 A1, Mar. 30, 2023
Int. Cl. C04B 12/00 (2006.01); C04B 14/28 (2006.01); C04B 14/42 (2006.01); C04B 14/18 (2006.01); C04B 18/14 (2006.01); C04B 14/36 (2006.01); C04B 16/06 (2006.01); C04B 14/04 (2006.01); C04B 103/54 (2006.01); C04B 103/44 (2006.01)

CPC C04B 12/007 (2021.05) [C04B 14/043 (2013.01); C04B 14/185 (2013.01); C04B 14/28 (2013.01); C04B 14/36 (2013.01); C04B 14/42 (2013.01); C04B 16/0641 (2013.01); C04B 18/146 (2013.01); C04B 2103/445 (2013.01); C04B 2103/54 (2013.01)]

10 Claims

1. A preparation method for CO₂solidified fiber cement board, comprising the following steps;

dispersing cellulose fibers and organic synthetic fibers in water to obtain a fiber suspension;

mixing a gelling component and an additive to obtain a mixed material; the gelling component comprises one or more of calcium silicate mineral powder, calcium silicate mineral phase-rich steel slag powder, and calcium silicate mineral phase-rich magnesium slag powder; the additive comprises silica fume, limestone powder, shell powder and pigment;

mixing the fiber suspension, the mixed material, and water to obtain a slurry, and the slurry is sequentially dewatered, grouted, and statically maintained to obtain a slab, and the slab is cured in a CO₂atmosphere to obtain the fiber cement board.