Experimental investigation and mathematical strength model study on the mechanical properties of cemented paste backfill

Zhou, Xinlong; Hu, Shaohua; Zhang, Guang; Li, Junzhe; Xuan, Dequan; Gao, Wei

doi:10.1016/j.conbuildmat.2019.07.148

Cited by 24 publications

(7 citation statements)

References 33 publications

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“…After reaching the specified curing times (7 and 28 days), the specimens were taken out for testing. Three samples were tested for each batch, and the results were averaged [50,51]. The process of specimen preparation is shown in Figure 9.…”

Section: Preparation Of Specimenmentioning

confidence: 99%

Dynamic Loading Characteristics of Cemented Paste Backfill with Recycled Rubber

Li,

Wang,

Song

et al. 2024

Minerals

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The purpose of this study was to investigate the effect of the use of rubber powder from tire recovery on the dynamic loading performance of CPB. Finally, it is concluded that using recycled rubber material to backfill mine paste is helpful in reducing waste tire pollution and improving the impact resistance of the backfill body. The dynamic compressive strength, Dynamic Increase Factor (DIF), peak dynamic load strain, and dynamic load elastic modulus of the samples composed of slag, Portland cement, wastewater, and rubber powder were determined. Through the analysis of the experimental data, it can be seen that the recycled rubber reduces the dynamic compressive strength and DIF of the specimen but increases the peak dynamic load strain and dynamic load elastic modulus and other characteristics, and enhances the ability of the filled body to absorb elastic strain energy. The results show that recycled rubber can increase the deformation ability of the filler and improve the impact resistance of the filler. The results of this study provide valuable information and industrial applications for the effective management of solid waste based on sustainable development and the circular economy.

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Section: Preparation Of Specimenmentioning

confidence: 99%

Dynamic Loading Characteristics of Cemented Paste Backfill with Recycled Rubber

Li,

Wang,

Song

et al. 2024

Minerals

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“…The unconfined compressive strength (UCS) is usually the most preferred test to estimate the mechanical stability of CTB due to its simplicity, reliability and affordability 3 , 15 . Grice 16 pointed out that CTB must have UCS of greater than 4 MPa when used as hangingwall support.…”

Section: Introductionmentioning

confidence: 99%

An experimental and numerical study of the strength development of layered cemented tailings backfill

Chiloane,

Sengani,

Mulenga

2024

Sci Rep

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The behaviour of a stratified backfilled stope in terms of strength development and stress distribution has not been well established in the field of rock engineering. Yet, the mining industries with massive ore bodies are looking into high production with a high standard of safety which is mainly governed by large excavation with backfill as a support system. It is difficult to fill these large excavations at one time. Therefore, a subsequent backfilling of the stope layer by layering is adopted, which results in a layered backfill structure. The purpose of this study was to explore the strength development, stress distribution and deformation across the stope supported by both layered and non-layered backfill. It has been observed that the backfill support system gain its strength with time, however, the layered backfill support system loses its strength when more layers are introduced, this is due to the shearing effect around the interfaces of the backfill layers. The impact of layering was validated by 3D numerical simulation. It is therefore concluded that non layered backfill support system are more suitable for stoping mining methods rather than layered support system.

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“…In the same method, Yue (Yue et al, 2016) established a mathematical model to describe the rheological properties of MPC. In the application of mathematical models for material strength, Zhou (Zhou et al, 2019) used power function and linear function models to study the relationship between the compressive strength of backfilled cement slurry under different curing times and cement-to-tailing ratio and slurry concentration and further derived mathematical models for the effects of cement-to-tailing ratio and slurry concentration on strength under different curing times, which obtained better accuracy. Wael Mahmood (Mahmood et al, 2022) used a linear model, a nonlinear model, and a multiplelinear model to study the effects of multiple independent variables on the compressive strength of cement grouting sand, among which the nonlinear model was of the best performance.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Strength of Different Minerals-Modified MPC Based on Mathematical Models

Kang,

Bao,

et al. 2024

Int J Concr Struct Mater

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The study discussed the effects of different mineral incorporations and the curing time on the strength of modified magnesium phosphate cement (MPC) mortars through mechanical tests, mathematical model analysis and microstructure characterization. Fly ash (FA), silica fume (SF), and metakaolin (MK), which exhibit excellent durability and bonding properties, were used to modify the MPC. A quantitative relationship was established between the strength of modified MPC mortars and the mineral incorporation and curing time. First, the strength of each mineral-modified MPC mortar cured in air with different mineral incorporations and curing durations was evaluated. The strengths of MPC mortars containing 10% fly ash, 15% silica fume, and 10% metakaolin—which perform best in their incorporations—were compared to analyze the function of the three minerals. To establish the relationship between strength and mineral incorporation and curing time, three mathematical models, linear model, general nonlinear model, and data distribution shape nonlinear model (DDSNM), are commonly used for material property analysis based on statistics. DDSNM best describes the trend of strength change among the three models and the error is small for three minerals. Based on DDSNM, the influence of various minerals on the strength of MPC mortar was quantitatively evaluated by calculating the variable partial derivatives, and verified by scanning electron microscopy and X-ray diffraction. MK performs the best in improving the flexural strength performance of MPC, while SF performs the best in the compressive strength. FA-MPC has low sensitivity to dosage fluctuations and is easy to prepare.

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Experimental investigation and mathematical strength model study on the mechanical properties of cemented paste backfill

Cited by 24 publications

References 33 publications

Dynamic Loading Characteristics of Cemented Paste Backfill with Recycled Rubber

Dynamic Loading Characteristics of Cemented Paste Backfill with Recycled Rubber

An experimental and numerical study of the strength development of layered cemented tailings backfill

Analysis of the Strength of Different Minerals-Modified MPC Based on Mathematical Models

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