Vol.10, No.4, 2022, pp.1007-1023, doi:10.32604/jrm.2022.017372
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ARTICLE
Preparation of Micro-Iron Ore Tailings by Wet-Grinding and Its Application in Sulphoaluminate Cement
  • Yingchun Yang1,*, Liqing Chen1, Xingdong Sun1, Yuguang Mao2
1 College of Engineering, Anhui Agricultural University, Hefei, 230036, China
2 College of Civil Engineering, Hunan University, Changsha, 410082, China
* Corresponding Author: Yingchun Yang. Email:
Received 06 May 2021; Accepted 21 June 2021; Issue published 02 November 2021
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 AH3, fine pore structure, and high hydration degree of SAC. The findings suggested one new approach to utilize iron ore tailings in cement-based materials.
Keywords
Micro iron ore tailings; sulphoaluminate cement; ettringite; compressive strength; hydration process
Cite This Article
Yang, Y., Chen, L., Sun, X., Mao, Y. (2022). Preparation of Micro-Iron Ore Tailings by Wet-Grinding and Its Application in Sulphoaluminate Cement. Journal of Renewable Materials, 10(4), 1007–1023.
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