Effect of different particle size distribution of zeolite on the strength of cemented paste backfill

Tüylü, Serkan

doi:10.1007/s13762-021-03659-7

Cited by 25 publications

(6 citation statements)

References 34 publications

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“…In the study, Rakine et al [5] indicate that paste strengthens as cement or solids content and cure time rise. Although there were considerable differences in effective cohesion values for fill mixes, they generally indicated an increase in cement concentration, solids content, and curing time [6].…”

Section: Introductionmentioning

confidence: 88%

Predicting tensile strength of cemented paste backfill with aid of second order polynomial regression

Ngo

Nguyen

Tran

2022

JSTT

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The materials left behind after the process of separating an ore's valuable fraction from the unprofitable fraction are known as tailings in the mining industry. Mixing tailing, cement and water can create a new material called Cemented paste backfill (CPB). Research and solve the problem of predicting the tensile strength of cement paste backfill based on a polynomial model combined with the Monte Carlo Simulation method. Three models were built to evaluate performance. The optimal performance model is then used to predict the tensile strength of cement paste backfill. The results indicate that using the polynomial regression model has a satisfactory result for predicting the tensile strength of cement paste backfill. The best performance of second order polynomial regression model is evaluated by three metrics such as R2=0.958 RMSE=33.211 kPa MAE=29.097 kPa for testing part in predicting the tensile strength of cemented paste backfill. Finally, the influence of Cement/Tailings ratio and Solid content on the tensile strength on tensile strength and importance is also evaluated with aid of the best performance of second order polynomial regression model.

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Section: Introductionmentioning

confidence: 88%

Predicting tensile strength of cemented paste backfill with aid of second order polynomial regression

Ngo

Nguyen

Tran

2022

JSTT

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“…The cemented tailings backfill (CTB) technique is widely used in deep underground mining, since this technique is effective to support surrounding rock, control rockburst, reduce ground subsistence, and reduce surface disposal of tailings 1–4 . Plenty of investigations have been attempted to experimentally or numerically evaluate the strength of CTB with different components (e.g., mixture of cement, tailings, fly ash, and blast furnace slag) to ensure the geological stability when extracting adjacent stopes 5–9 . However, in actual practices, CTB is much “soft” in respect of mechanical properties to surrounding rockmass.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] Plenty of investigations have been attempted to experimentally or numerically evaluate the strength of CTB with different components (e.g., mixture of cement, tailings, fly ash, and blast furnace slag) to ensure the geological stability when extracting adjacent stopes. [5][6][7][8][9] However, in actual practices, CTB is much "soft" in respect of mechanical properties to surrounding rockmass. After extracting ore from stopes, CTB is filled in the gob; stress redistribution occurs in the backfill stope and surrounding rocks.…”

Section: Introductionmentioning

confidence: 99%

On the fracture and energy characteristics of rock–backfill composite structure specimens exposed to fatigue–creep interaction loading

Wang,

Yi,

Long

et al. 2023

Fatigue Fract Eng Mat Struct

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A series of stress‐controlled fatigue–creep interaction loading tests were performed on rock–backfill composite structure (RBCS) samples. The testing results reveal the influence of cement/tailing (c/t) on deformation, energy dissipation, damage evolution, and macro–meso failure patterns. The equivalent lifetime of RBCS is the largest for a sample with smaller stiffness filling, a smaller stiffness filling leads to weaker volumetric expansion. Additionally, strain energy is relatively large for larger stiffness filling, indicating a larger proportion of energy release at failure. A dissipated energy‐based damage evolution model is proposed to describe damage propagation at the entire fatigue–creep process which fits well with the experimental data. Moreover, the macro–meso failure pattern reveals the interactions between surrounding rock and filling material, failure seems to change from tension splitting to shear with increasing c/t. Good agreement was found among the volumetric deformation, energy dissipation, and failure pattern. It is suggested that flexible backfilling is benefit to prevent rock spalling and collapse.

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“…Typically, ordinary Portland cement (OPC) is used as the binder material, which accounts for 4-20% of the CPB's mass fraction [7,8]. OPC is generally partially replaced by pozzolanic materials such as metallurgical slag, fly ash, zeolite, and sintered soil to reduce the cost [9][10][11][12]. Many other researchers have developed customized backfill binders to pursue lower cost, high performance, or value-added utilization.…”

Section: Introductionmentioning

confidence: 99%

A Green Sintering-Free Binder Material with High-Volumetric Steel Slag Dosage for Mine Backfill

Xiao

Huang²,

Zhang

2022

Minerals

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Cemented paste backfill (CPB) is a sustainable mining method that has been increasingly utilized. Demand for high-performance and low-cost binder material is one of the limitations in CPB utilization. This work aims to examine a new, green, and economical steel-slag-based binder for CPB and to explore valorization techniques of steel slag (SS). Proportioning experiments were performed to obtain the best binder recipes for various steel slag dosages. The hydration heat, hydration products, and pore structure of a high-volumetric steel slag binder (H-SSB) were further inspected. Results show that the H-SSB, which contains 50 wt.% of SS, has a competitive strength performance superior to ordinary Portland cement (OPC) regardless of its 30–50% lower cost than OPC. The 7-day and 28-day strengths of H-SSB CPB are 1.24 and 0.74 MPa, respectively, which meets the meets of most free-standing backfill applications. The H-SSB generates less hydration heat and a larger amount of gel and ettringite hydrates than OPC in its early hydration, which can reduce the thermal expansion risks and strengthen the mechanical properties of CPB. Though the H-SSB CPB has a larger porosity than OPC-CPB at 28-day curing (45% vs. 37%), most pores are small and uniform in diameter (500–2000 nm), which is less harmful to CPB strength development. The H-SSB has secondary hydration effects in the long-term age, which can fill and refine the pore structure. The proposed H-SSB has benefits in reducing backfill costs, minimizing green gas emissions, and extending steel slag valorization techniques that can promote sustainable development of the mining and steel industries.

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Effect of different particle size distribution of zeolite on the strength of cemented paste backfill

Cited by 25 publications

References 34 publications

Predicting tensile strength of cemented paste backfill with aid of second order polynomial regression

Predicting tensile strength of cemented paste backfill with aid of second order polynomial regression

On the fracture and energy characteristics of rock–backfill composite structure specimens exposed to fatigue–creep interaction loading

A Green Sintering-Free Binder Material with High-Volumetric Steel Slag Dosage for Mine Backfill

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