@Article{jrm.2022.017372,
AUTHOR = {Yingchun Yang, Liqing Chen, Xingdong Sun, Yuguang Mao},
TITLE = {Preparation of Micro-Iron Ore Tailings by Wet-Grinding and Its Application in Sulphoaluminate Cement},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {10},
YEAR = {2022},
NUMBER = {4},
PAGES = {1007--1023},
URL = {http://www.techscience.com/jrm/v10n4/45343},
ISSN = {2164-6341},
ABSTRACT = {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 were investigated by particle size analysis, XRD, and XPS. The hydrates trait and the hydration mechanism of micro-IOTs-SAC composite were studied by XRD, TGA, MIP, and SEM. The results demonstrated that micro-IOTs with an average grain diameter of 517 nm could be obtained by wet-grinding. The setting time of SAC gradually decreased with increasing micro-IOTs content. By adding 2% micro-IOTs, the compressive strengths of SAC pastes were enhanced about 22% and 10% at 4 h and 28 d, respectively. Moreover, the addition of micro-IOTs accelerated ettringite precipitation and changed its morphology, resulting in early strength improvement of the binary system. And increased later strength by micro-IOTs was closely related to the high content of AH<sub>3</sub>, fine pore structure, and high hydration degree of SAC. The findings suggested one new approach to utilize iron ore tailings in cement-based materials.},
DOI = {10.32604/jrm.2022.017372}
}