Grinding method and sulfate content influence on LC ³ cement production using waste as spent fluid catalytic cracking catalyst (FCC) and marble dust

[EN] This article examines the effects of two grinding methods to producing Limestone Calcined Clay Cement (LC3), using two types of waste materials: fluid catalytic cracking residue (FCC) and marble cutting residue (MR). In the production of LC3 cement, the grinding process plays a crucial role in determining the quality of the final product. To ensure the proper reactivity of this new LC3 formulation, the sulfate content is carefully regulated by the addition of gypsum. The optimum sulfate content was investigated through several studies, and the reactivity of the cement pastes was examined using diverse techniques. The compressive strength of the mortars was assessed at various curing periods. The microcalorimetric studies determined that the optimum sulfate content for the mixtures was consistent across both grinding methods. However, the compressive strength tests revealed that the optimum sulfate content varied between 3.1% and 4.0%, depending on both the grinding method used and the curing age analyzed.