Patent ID: 11858848
Assignee: BEIJING UNIVERSITY OF TECHNOLOGY
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 1:
2. The regulating cementitious material according to claim 1, wherein the ye'elimite is prepared by:
mixing powders of calcium carbonate (CaCO3), aluminum trioxide (Al2O3) and calcium sulfate (CSH2) according to a molar ratio of CaCO3:Al2O3:CSH2=3:3:1 to obtain a powder mixture,
adding a powder of ye'elimite of 5% by weight of the powder mixture into the powder mixture as crystalline seeds,
then sequentially mixing evenly, compacting, and calcining by raising a temperature to 1350° C. in 2 hours (h) and then keeping the temperature for 2 h,
afterwards, cooling to a room temperature in 1 minute (min), and grinding until all passing through 200 mesh sieve;
wherein a purity of the ye'elimite is greater than 97.5%.