Compressive fatigue behavior and failure evolution of additive fiber-reinforced cemented tailings composites

Jiajian Li; Shuai Cao; Erol Yilmaz; Yunpeng Liu

doi:10.1007/s12613-021-2351-x

Volume 29 Issue 2

Feb. 2022

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2022 > 29(2): 345-355

Jiajian Li, Shuai Cao, Erol Yilmaz, and Yunpeng Liu, Compressive fatigue behavior and failure evolution of additive fiber-reinforced cemented tailings composites, Int. J. Miner. Metall. Mater., 29(2022), No. 2, pp. 345-355. https://doi.org/10.1007/s12613-021-2351-x

Cite this article as:

Jiajian Li, Shuai Cao, Erol Yilmaz, and Yunpeng Liu, Compressive fatigue behavior and failure evolution of additive fiber-reinforced cemented tailings composites, Int. J. Miner. Metall. Mater., 29(2022), No. 2, pp. 345-355. https://doi.org/10.1007/s12613-021-2351-x

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Research Article

Compressive fatigue behavior and failure evolution of additive fiber-reinforced cemented tailings composites

+ Author Affiliations

Corresponding authors:
Shuai Cao E-mail: sandy_cao@ustb.edu.cn

Erol Yilmaz E-mail: erol.yilmaz@erdogan.edu.tr
Received: 28 July 2021; Revised: 6 September 2021; Accepted: 8 September 2021; Available online: 10 September 2021

Abstract

Abstract

The ordinary cemented tailings backfill (CTB) is a cement-based composite prepared from tailings, cementitious materials, and water. In this study, a series of laboratory tests, including uniaxial compression, digital image correlation measurement, and scanning electron microscope characteristics of fiber-reinforced CTB (FRCTB), was conducted to obtain the uniaxial compressive strength (UCS), failure evolution, and microstructural characteristics of FRCTB specimens. The results show that adding fibers could increase the UCS values of the CTB by 6.90% to 32.76%. The UCS value of the FRCTB increased with the increase in the polypropylene (PP) fiber content. Moreover, the reinforcement effect of PP fiber on the CTB was better than that of glass fiber. The addition of fiber could increase the peak strain of the FRCTB by 0.39% to 1.45%. The peak strain of the FRCTB increased with the increase in glass fiber content. The failure pattern of the FRCTB was coupled with tensile and shear failure. The addition of fiber effectively inhibited the propagation of cracks, and the bridging effect of cracks by the fiber effectively improved the mechanical properties of the FRCTB. The findings in this study can provide a basis for the backfilling design and optimization of mine backfilling methods.
- cemented tailings backfill;
- uniaxial compressive strength;
- combined fiber reinforcement;
- digital image correlation;
- microstructural characteristics

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