Sulfate Corrosion Resistance and Microstructure Characteristics of Iron Tailings Concrete

MIAO Qing; CHANG Jian; SUN Boyi

doi:10.3969/j.issn.1000-6532.2024.02.009

2024 No. 2

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Article navigation > Multipurpose Utilization of Mineral Resources > 2024 > 45(2): 52-58

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MIAO Qing, CHANG Jian, SUN Boyi. Sulfate Corrosion Resistance and Microstructure Characteristics of Iron Tailings Concrete[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(2): 52-58. doi: 10.3969/j.issn.1000-6532.2024.02.009

Citation:

MIAO Qing, CHANG Jian, SUN Boyi. Sulfate Corrosion Resistance and Microstructure Characteristics of Iron Tailings Concrete[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(2): 52-58. doi: 10.3969/j.issn.1000-6532.2024.02.009

Sulfate Corrosion Resistance and Microstructure Characteristics of Iron Tailings Concrete

1.
Shanxi Vocational University of Engineering Science, Jinzhong 030619, Shanxi, China
2.
Shenyang Research Institute of China Coal Science and Industry Group, Shenyang 110000, Liaoning, China
3.
School of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China

Received Date: 15 August 2022

Publish Date: 25 April 2024

Abstract

Abstract

This is an article in the field of ceramics and composites. Mechanical properties and durability of sodium sulfate solution corrosion of iron tailings concrete are developed. The effects of different iron tailings content, the number of dry and wet cycles, and the concentration of sodium sulfate solution on its mechanical properties and durability are analyzed. The results show that when the iron tailings content is 30%, the number of dry and wet cycles is 60 times, and the sodium sulfate concentration is 5%, the performance indicators of the concrete reach the best state. With the increasing amount of iron tailings, the better the corrosion resistance and frost resistance of concrete will be. The heat of hydration reaction is constantly decreasing. The porosity of concrete and the change of total mercury volume show a trend of first decreasing and then increasing. Under the same condition of iron tailings content, the change law of the main peak amplitude of concrete after corrosion shows an increasing trend. However, under the same sodium sulfate solution concentration, the main peak amplitude of concrete showed a trend of first decreasing and then increasing after corrosion.
- Ceramics and composites /
- Iron tailings /
- Concrete /
- Mass loss rate /
- Hydration reaction /
- Porosity /
- Total mercury volume

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References

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