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. 2024 Apr 29;29(9):2056.
doi: 10.3390/molecules29092056.

The Preparation and Dust Suppression Performance Evaluation of Iron Ore Tailing-Based Cementitious Composites

Miaomiao Nie  1   2   3 , Shefeng Li  1   2   3 , Xuli Li  1   2   3 , Shenxu Bao  4 , Pei Chen  1   2   3 , Yong Zhang  1   2   3 , Siyu Ding  1   2   3 , Jiale Li  1   2   3
Affiliations

The Preparation and Dust Suppression Performance Evaluation of Iron Ore Tailing-Based Cementitious Composites

Miaomiao Nie et al. Molecules. .

Abstract

In order to comprehensively utilize iron ore tailings (IOTs), the possibility of using IOTs as raw materials for the preparation of cementitious composites (IOTCCs) was investigated, and IOTCC was further applied to mine interface pollution control. The mechanical properties, hydration products, wind erosion resistance, and freeze-thaw (F-T) cycle resistance of IOTCCs were evaluated rigorously. The activity index of iron tailings increased from 42% to 78% after grinding for 20 s. The IOTCC was prepared by blending 86% IOT, 10% ground granulated blast-furnace slag (GGBS), and 4% cement clinker. Meanwhile, the hydration products mainly comprised ettringite, calcium hydroxide, and C-S-H gel, and they were characterized via XRD, IR, and SEM. It was observed that ettringite and C-S-H gel were principally responsible for the strength development of IOTCC mortars with an increase in curing time. The results show that the kaolinite of the tailings was decomposed largely after mechanical activation, which promoted the cementitious property of IOT.

Keywords: cementitious material; iron ore tailings; mechanical properties; wind erosion.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
XRD pattern of IOTs.
Figure 2
Figure 2
Particle size distribution for different mill times of raw sand materials.
Figure 3
Figure 3
Reactivity index with respect to vibration grinding times.
Figure 4
Figure 4
XRD analysis of 20 s of vibrational milling and unground iron tailings.
Figure 5
Figure 5
Influence of the water–cement ratio on the compressive strength of test blocks.
Figure 6
Figure 6
Effect of different iron tailing admixtures on the compressive strength of test blocks.
Figure 7
Figure 7
XRD analysis of iron tailing-based cementitious materials at different maintenance ages.
Figure 8
Figure 8
FT-IR analysis of iron tailing-based cementitious materials at different maintenance ages.
Figure 9
Figure 9
SEM images of iron tailing-based cementitious materials at different ages: (a) 3 days, 5000 magnification, (b) 3 days, 10,000 magnification, (c) 7 days, 2000 magnification, (d) 7 days, 1000 magnification, (e) 28 days, 5000 magnification, and (f) 28 days, 10,000 magnification.
Figure 9
Figure 9
SEM images of iron tailing-based cementitious materials at different ages: (a) 3 days, 5000 magnification, (b) 3 days, 10,000 magnification, (c) 7 days, 2000 magnification, (d) 7 days, 1000 magnification, (e) 28 days, 5000 magnification, and (f) 28 days, 10,000 magnification.
Figure 10
Figure 10
Results of the crust-layer compressive strength and the number of the F–T cycle.
See this image and copyright information in PMC

References

    1. Liu K., Wang S., Quan X., Jing W., Xu J., Zhao N., Liu B., Ying H. Industrial byproduct Iron ore tailings as ecofriendly materials in the utilization of cementitious composites. Constr. Build. Mater. 2023;372:130813. doi: 10.1016/j.conbuildmat.2023.130813. - DOI
    1. Liu J., Ge X., Liu P., Song G., Hu Z. Experimental study on the preparation of cementitious materials from iron ore tailings by activation. Constr. Build. Mater. 2023;385:131409. doi: 10.1016/j.conbuildmat.2023.131409. - DOI
    1. Gou M., Zhou L., Then N.W.Y. Utilization of tailings in cement and concrete: A review. Sci. Eng. Compos. Mater. 2019;26:449–464. doi: 10.1515/secm-2019-0029. - DOI
    1. Yang M., Sun J., Dun C., Duan Y., Meng Z. Cementitious activity optimization studies of iron tailings powder as a concrete admixture. Constr. Build. Mater. 2020;265:120760. doi: 10.1016/j.conbuildmat.2020.120760. - DOI
    1. de Magalhaes L.F., França S., dos Santos Oliveira M., Peixoto R.A.F., Bessa S.A.L., da Silva Bezerra A.C. Iron ore tailings as a supplementary cementitious material in the production of pigmented cements. J. Clean. Prod. 2020;274:123260. doi: 10.1016/j.jclepro.2020.123260. - DOI

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