Study on preparation of aerated concrete block from vanadium-titanium magnetite tailing

Ding Chunjiang; Zhang Kaifeng

doi:10.7513/j.issn.1004-7638.2022.02.015

Volume 43 Issue 2

May 2022

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Ding Chunjiang, Zhang Kaifeng. Study on preparation of aerated concrete block from vanadium-titanium magnetite tailing[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 94-100. doi: 10.7513/j.issn.1004-7638.2022.02.015

Citation:

Ding Chunjiang, Zhang Kaifeng. Study on preparation of aerated concrete block from vanadium-titanium magnetite tailing[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 94-100. doi: 10.7513/j.issn.1004-7638.2022.02.015

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Study on preparation of aerated concrete block from vanadium-titanium magnetite tailing

doi: 10.7513/j.issn.1004-7638.2022.02.015

State Key Laboratory of Silicate Building Materials, Wuhan University of Technology, Wuhan 430070, Hubei, China

Received Date: 2018-11-10
Available Online: 2022-05-11
Publish Date: 2022-04-28

Abstract

Abstract

The aerated concrete block was prepared with the tailings as the main raw material by autoclave-free method. The influence of formula composition on dry density and compressive strength was studied. The results showed that the compressive strength increased first and then decreased, while the dry density had the opposite trend with the addition of cement and lime. The slag improved the compressive strength and dry density, which was lowered by the introduction of Al powder. Aerated concrete blocks with compressive strength of 4.41 MPa and dry density of 695 kg/m³ could be achieved, when the optimum formula (vanadium titanomagnetite tailings∶slag∶quicklime∶cement∶gypsum = 6∶6∶4∶3∶1, 0.05% aluminum powder) was adopted. After 28 days of curing, tobermorite and calcium silicate hydrate were produced. A large number of well-crystallized and fibrous tobermorite interweaved with CSH, forming a typical bridging structure. Therefore, the samples were endowed with low thermal conductivity, excellent water resistance, environmental safety, heat and fire resistance. This paper provides reference for efficient utilization of vanadium titanomagnetite tailings in Chengde.
- vanadium titanomagnetite,
- tailings,
- aerated concrete block,
- compressive strength,
- dry density,
- microstructure

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References(16)

References

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