Notice of RetractionUtilization of Hematite Tailings in Non-Fired Bricks Production

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

Iron tailings is a kind of solid waste generated from the process of iron extraction from iron ore, it can be reprocessed to produce building materials. The present study deals with the utilization of hematite tailings in non-fired bricks production. The tailing bricks were prepared by pressing and curing process, in the presence of cementing materials and coarse aggregates. Some factors influencing the mechanical strength of the bricks including forming water content, forming pressure, content of tailings in raw materials and curing conditions, were investigated. The phases and microstructure of the green tailings and tailing brick samples were characterized by XRD and SEM for further mechanism research. The results show that the non-fired bricks with 78% hematite tailings can be prepared in the optimal conditions of forming water content and forming pressure are 15% and 20 MPa, respectively, and the suitable curing conditions is natural curing in room temperature for 28 d. The compressive strength of products can come up to 15.9 MPa, the other physical properties and durability are well conformed to non-fired rubbish gangue brick standard (JC/T422-2007). The main mineral phases of products are hematite, quartz, CSH, calcite and AFt, which are principally responsible for the mechanical strength of bricks.