Recycling mine tailings as precursors for cementitious binders – Methods, challenges and future outlook

Maruthupandian, Surya; Chaliasou, Napoleana-Anna; Kanellopoulos, Antonios

doi:10.1016/j.conbuildmat.2021.125333

Cited by 40 publications

(16 citation statements)

References 135 publications

(265 reference statements)

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“…Table 3 shows that incorporating 10% gold tailings increases tensile strength by 19.64% [11]. However, when 20% gold tailings are incorporated, the tensile strength increases by 19.61% [12].…”

Section: Relave Minero De Oro Como Agregado Fino Para Aumentar La Res...mentioning

confidence: 99%

Gold and Iron Tailings to Improve the Compressive Strength and Workability of Concrete

Reyes,

Vallejos,

Rodríguez

et al. 2023

ijmst

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This scientific study aims to determine the optimal replacement percentage of mine tailings as a substitute for fine aggregate to improve both the compressive strength and the workability of the concrete, both in the case of gold mine tailings and gold mine tailings iron. It is a documentary, bibliographical and descriptive investigation that follows a deductive method with a quantitative approach. In addition, it is descriptive, correlational, and explanatory, with a descriptive level and a non-experimental, longitudinal, and retrospective design. The results indicate that the incorporation of 15% gold mining tailings increases the compressive strength by 4,44% while incorporating 12% iron mining tailings increases the resistance to compression by 7,79%. Likewise, by adding 30% gold mining tailings, a notable increase of 74,36% in tensile strength is obtained. On the other hand, when 5% gold mine tailings are added, the slump remains at 4"; however, by increasing the addition to 10%, it decreases from 2" to 1.77". In the case of tailings iron miners incorporating 30% the settlement remains at 2"; but by increasing the amount to 12%, the slump decreases from 3.32" to 1.57". Finally, the study shows that using mine tailings as a substitute for fine aggregate can significantly improve the compressive strength and workability of concrete, depending on the type of tailings and its percentage of incorporation.

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Section: Relave Minero De Oro Como Agregado Fino Para Aumentar La Res...mentioning

confidence: 99%

Gold and Iron Tailings to Improve the Compressive Strength and Workability of Concrete

Reyes,

Vallejos,

Rodríguez

et al. 2023

ijmst

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“…Cement Portland cement (P.O. 42.5 N) was the cement used in this study, with a density of 3.0 g/cm 3 and a specific surface area of 380 cm 2 /g. The chemical composition of the cementitious material is determined according to the Chinese standard (GB/T 176-2017) [29], the chemical composition is listed in Table 1, and the picture is presented in Figure 1a.…”

Section: Experimental Programsmentioning

confidence: 99%

“…Concrete is an essential material for the construction of modern industrialized society and has been extensively used in all walks of life [1][2][3]. It takes on a critical significance in energy systems, water and sewage systems, high-rise buildings, as well as transportation networks.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Mechanism Analysis of Graphite Tailings Environment-Friendly Concrete

Duan

Liu

et al. 2022

Materials

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The development of tailings in concrete technology is not only conducive to the realization of the goal of reducing carbon emissions, but also conducive to the inhibition the occurrence of shortages of sand and gravel supplies. In this study, graphite tailings were used to replace sand in the range of 0~100%, and the mechanical mechanism of graphite tailings concrete was examined through compressive and flexural tests. The mechanical experimental results were evaluated and verified based on concrete macroscopic failure appearance, mesoscopic failure appearance, and physical characteristics of graphite tailings. The results revealed that the concrete strength increases first and then decreases with the increase of the graphite tailings content. Compared to GT00 (GT00 is a specimen with a graphite tailings content of 0%, and so on), GT10~GT60 exhibited better mechanical properties, of which 30% was recommended as the optimal replacement rate. The mechanical properties of GT10 and GT20 had an upward trend, and GT30 had low spalling, with aggregate fragmentation found on the fracture surface. GT30 showed the best resistance to bending and deformation. The mechanical properties of GT40~GT60 had a downward trend. When the graphite tailings content was higher than 70%, the interface defects of the aggregate matrix increased, thus making it easier for cracks to propagate along the interface. Furthermore, the mechanism of graphite tailings replacing sand verified the test results from different perspectives, which provides new analysis ideas for other tailings in environment-friendly concrete.

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“…Tailings are a major source of solid waste generated by the separation of valuable fractions from ore during mining operations [ 1 , 2 ]. Improper disposal of tailings occupies land resources, pollutes the environment, and releases hazardous substances [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behaviour Evaluation of Full Iron Tailings Concrete Columns under Large Eccentric Short-Term Loading

Sun

Zhang

et al. 2023

Materials

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In this study, full iron tailings concrete (FITC) was created using iron tailings from a tailings pond in Qian’an, China. Iron tailings account for 86.8% of the total mass of solid raw materials in the FITC. To enable large-scale use of FITC, a comprehensive investigation of the structural behaviour of full-iron tailing-reinforced concrete (FITRC) specimens is warranted. Therefore, eight rectangular reinforced concrete (RC) columns with conventional reinforced concrete (CRC) as a control were tested to investigate the effects of section dimensions, initial eccentricities, and concrete strengths, on the structural behaviour of FITRC columns under large eccentric short-term loading. The experimental and analytical results indicated that the sectional strain of the FITRC columns satisfied the plane-section assumption under short-term loading, and the lateral deflection curve agreed well with the half-sinusoidal curve. In addition, the FITRC columns exhibited a slightly lower cracking load and lower ultimate load capacity than the CRC columns, and the crack widths were larger than those of the CRC columns. The reduction in the load capacity observed in the FITRC was within the permissible range stated in the design code, thereby satisfying the code requirements. The deformation coefficients of the FITRC and CRC columns were identical, and the cracking and ultimate loads calculated according to the current code and theories were in good agreement with the measured results.

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Recycling mine tailings as precursors for cementitious binders – Methods, challenges and future outlook

Cited by 40 publications

References 135 publications

Gold and Iron Tailings to Improve the Compressive Strength and Workability of Concrete

Gold and Iron Tailings to Improve the Compressive Strength and Workability of Concrete

Mechanical Properties and Mechanism Analysis of Graphite Tailings Environment-Friendly Concrete

Mechanical Behaviour Evaluation of Full Iron Tailings Concrete Columns under Large Eccentric Short-Term Loading

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