Loading rate effect on the uniaxial compressive strength (UCS) behavior of cemented paste backfill (CPB)

Xiu, Zhanguo; Wang, Shuhong; Ji, Yingchun; Wang, Feili; Ren, Fengyu; Nguyen, Van-Tuan

doi:10.1016/j.conbuildmat.2020.121526

Cited by 47 publications

(13 citation statements)

References 40 publications

(45 reference statements)

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“…Yilmaz et al (2009) investigated the influence of curing pressure on mechanical properties of CTB by a self-designed test system and observed that the compressive strength development of CTB curing under vertical pressure was higher than that without vertical pressure ones, which could be mainly due to the applied pressure during curing process and improved consolidation process of the CTB material. Xiu et al (2021) and Cao et al (2019a) studied the effects of loading rates on the UCS of CTB and found that the increase in loading rate had a strengthening effect on the UCS, and the correlation between the UCS and the loading rates was more consistent with exponential function when the loading rates were between 0.1 and 2 mm/min. Wang et al (2020a) reported that cyclic loading and unloading had perceptible effect on the mechanical properties of CTB, and the direct reason for the change of UCS is the change of deformation modulus caused by cyclic loading and unloading.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Microstructure Evolution of Cemented Tailings Backfill Under Seepage Pressure

Shen

Chen

et al. 2022

Front. Mater.

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Cemented tailing backfill (CTB) in underground mine inevitably experiences seepage field, which complicates its mechanical behavior. In this study, the mechanical properties and microstructure characteristics of CTB under different seepage water pressures (SWPs) were investigated. The results show that, with the increase in SWP, the mechanical properties of CTB decrease, but the decreasing trend reduces gradually. Higher SWP leads the microstructure of CTB looser and more porous, and the largest proportion of pores initiated and propagated by SWP is micropores, which means the damage in CTB under seepage is mostly caused by micropores. Besides, the mechanical properties of CTB under seepage decrease exponentially with the increase in porosity and present linearly inverse proportional relation to the pore area fractal dimension. Results above indicate that SWP has a significant deterioration effect on the mechanical properties and microstructure of CTB. The research could not only extend the knowledge of mechanical properties and microstructure characteristics of CTB under seepage but also provide a theoretical reference for mechanical index determination and stability analysis of CTB in water-rich underground mines.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Microstructure Evolution of Cemented Tailings Backfill Under Seepage Pressure

Shen

Chen

et al. 2022

Front. Mater.

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“…The uniaxial compression acoustic emission test was carried out on the RMT-150C rock mechanics test system with the control method of stroke control and the set displacement loading rate of 0.02 mm/s [26]. The Micro-II Digital AE System is used for acoustic emission signal acquisition during the loading process.…”

Section: Methodsmentioning

confidence: 99%

Study on Acoustic Emission and Coda Wave Characteristics of Layered Cemented Tailings Backfill under Uniaxial Compression

Huang

et al. 2022

Minerals

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The paper analyzes the effects of filling times and filling interval time on the acoustic emission characteristics and coda wave characteristics of layered cemented tailings backfill under uniaxial compression and, to a certain extent, enriches the study of layered cemented tailings backfill in this field. The work aims to monitor the early warning of layered cemented tailings backfill with different layering factors during deformation and damage by the changing law of acoustic emission and ultrasonic signals. By conducting uniaxial compression tests, acoustic emission, and ultrasonic tests of layered cemented tailings backfill, the acoustic emission parameters and their fractal characteristics of layered cemented tailings backfill with different layering factors during uniaxial compression were calculated. Meanwhile, the variation law of the coda wave velocity variation rate of layered cemented tailings backfill during uniaxial loading was analyzed using coda wave interferometry. The test results show the feasibility of using acoustic emission and ultrasonic means to monitor and warn about the deformation damage of layered cemented tailings backfill.

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“…Therefore, the used AT can be regarded as fine-grained soils [30]. More detailed information and discussions of the used AT can be found in previous studies [31,32]. To investigate the effects of the lateral constraint stress on the mechanical behaviors of CPB, the GCTS triaxial testing system was used to conduct the experiment in this study.…”

Section: Materials and Equipmentmentioning

confidence: 99%

An analytical model for the triaxial compressive Stress-strain relationships of Cemented Pasted Backfill (CPB) with different curing time

Xiu

Wang

et al. 2021

Construction and Building Materials

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Loading rate effect on the uniaxial compressive strength (UCS) behavior of cemented paste backfill (CPB)

Cited by 47 publications

References 40 publications

Mechanical Properties and Microstructure Evolution of Cemented Tailings Backfill Under Seepage Pressure

Mechanical Properties and Microstructure Evolution of Cemented Tailings Backfill Under Seepage Pressure

Study on Acoustic Emission and Coda Wave Characteristics of Layered Cemented Tailings Backfill under Uniaxial Compression

An analytical model for the triaxial compressive Stress-strain relationships of Cemented Pasted Backfill (CPB) with different curing time

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