|Cite this article as:|
|Jiajian Li, Shuai Cao, and Erol Yilmaz, Compressive fatigue behavior and failure evolution of additive fiber-reinforced cemented tailings composites, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2351-x|
The ordinary cemented tailings backfill (CTB) was 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 (DIC) measurement and scanning electron microscope (SEM) 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 have shown 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 PP fiber content increased. Besides, the reinforcement effect of PP fiber on the CTB was better than that of glass fiber. Besides, the addition of fiber could increase the peak strain of the FRCTB by 0.39 to 1.45%. And the peak strain of FRCTB increased with the glass fiber content increased. The failure pattern of 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 backfilling method mining.