Preparation of Micro-Iron Ore Tailings by Wet-Grinding and Its Application in Sulphoaluminate Cement

Herein, micro iron ore tailings (micro-IOTs) were prepared by wet-grinding and applied to improve sulphoaluminate cement (SAC) performance. The physicochemical properties of micro-IOTs investigated particle size analysis, XRD, XPS. hydrates trait the hydration mechanism micro-IOTs-SAC composite studied TGA, MIP, SEM. results demonstrated that with an average grain diameter 517 nm could be obtained wet-grinding. setting time SAC gradually decreased increasing content. By adding 2% micro-IOTs, compressive strengths pastes enhanced about 22% 10% at 4 h 28 d, respectively. Moreover, addition accelerated ettringite precipitation changed its morphology, resulting in early strength improvement binary system. And increased later was closely related high content AH3, fine pore structure, degree SAC. findings suggested one new approach utilize cement-based materials.