Reuse Potentials of Copper Mine Tailings in Mortar and Concrete Composites

Esmaeili, Jamshid; Aslani, Hossein; Onuaguluchi, Obinna

doi:10.1061/(asce)mt.1943-5533.0003145

Cited by 30 publications

(7 citation statements)

References 37 publications

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“…Both mixes at 30% replacement still show acceptable functional properties needed for light to medium duty concrete with the drier mix manifesting higher superiority in terms of compressive strength. This is similar to the findings of Esmaeili et al (2020).…”

Section: Resultssupporting

confidence: 92%

“…The studies cited above demonstrated that copper tailings have the potential to be used in the production of various construction-related materials. Esmaeili et al, (2020) investigated the reuse of the copper mine tailings (CMT) was evaluated as a partial substitute material for cement in paste, mortar, and concrete mixtures in Iran. They used tailings taken from the Sungun open cast mining in Northern Iran which produces approximately 13.7 million tonnes of copper tailings are generated as solid waste annually as a result of mining and ore processing activities.…”

Section: Copper Tailings As Recyclable Materialsmentioning

confidence: 99%

“…Others include air pollution arising from nuisance dust particles blown by wind if the dumpsite is not vegetated, large areas of land becoming barren, pollution of underground water sources if the dump is located in geo- technically unsuitable site. According to Esmaeili et al (2020), the disposal of copper mine tailings (CMT) in sites close to human settlements remains a serious human safety and environmental management hazard in most copper-producing countries of the world.…”

Section: Research Background and Motivationmentioning

confidence: 99%

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Investigating the suitability and cost-benefit of copper tailings as partial replacement of sand in concrete in Zambia: an exploratory study

Muleya

Mulenga

Zulu

et al. 2020

JEDT

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Purpose This study aimed to investigate the suitability and cost-benefit of using copper tailings as partial replacement of sand in concrete production. The study was motivated by the accumulation and non-use of copper tailings in dams among them tailing dam 25 also known as TD 25 in Kitwe city of the Copperbelt province in Zambia that take up approximately 111 hectares of unused land. Design/methodology/approach Laboratory experimental approach of concrete production based on water/cement ratios of 0.3 and 0.5 was used because this was an exploratory study designed to establish the primary performance of concrete. In total, 30 concrete cubes were cast based on the two water-cement ratios. In total, 0% to 30% partial sand replacement with copper tailings was used in both mixes with the 0% copper tailings replacement being the control mix and reference point. Other concrete tests included workability, density, compressive strength and element composition analysis. Findings Results revealed that copper tailings from TD 25 were suitable for partial replacement of sand in concrete. Thirty per cent of sand replacement with copper tailings was established as the maximum replacement amount to produce optimum compressive strength values from both mixes. The drier mix of 0.3 water-cement ratios produced higher compressive strength results of 23 MPa at 28 days of concrete curing with 2.34% as optimum concrete cost reduction. Practical implications The research results provide the cost-benefit analysis and savings that can be attained from using cheaper copper tailings based concrete. The study further provided the quantity of land available for development arising from absorption of copper tailings as a sustainable construction material. The local authority now has statistics and numerical values that it can use to absorb copper tailings as a concrete raw material. Originality/value The study provides guidance on optimum concrete grade produced and cost reduction details of copper tailing-based concrete to support for local authorities in suitable land wand waste management using real data.

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Section: Resultssupporting

confidence: 92%

Section: Copper Tailings As Recyclable Materialsmentioning

confidence: 99%

Section: Research Background and Motivationmentioning

confidence: 99%

See 1 more Smart Citation

Investigating the suitability and cost-benefit of copper tailings as partial replacement of sand in concrete in Zambia: an exploratory study

Muleya

Mulenga

Zulu

et al. 2020

JEDT

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“…Because ore extraction is a ubiquitous activity, vast reserves of these tailings are available, and amounts are projected to increase with increasing mining activity. Studies have explored utilizing mine tailings as SCMs, alternative aggregates, non-structural construction materials, and backfill applications [15][16][17][18][19]. A recent study was undertaken to explore the possibility of alkali activating processed mine tailings.…”

Section: Introductionmentioning

confidence: 99%

“…Only a few systematic studies exist regarding the utilization of mine tailings as SCMs in concrete due to variations in composition and perceived low reactivity [15,16,19,20]. A replacement level of 10-20% has generally been recommended to avoid negative effects on compressive strength [19,20].…”

Section: Introductionmentioning

confidence: 99%

Mechanically activated mine tailings for use as supplementary cementitious materials

et al. 2021

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Two mine tailings are evaluated for their potential as supplementary cementitious materials. The mine tailings were milled using two different methods – ball milling for 30 minutes and disc milling for durations ranging from 1 to 15 minutes. The modified R3 test was carried out on the mine tailings to quantify their reactivity. The reactivity of the disc milled tailings is greater than those of the ball milled tailings. Strong correlations are obtained between milling duration, median particle size, amorphous content, dissolved aluminum and silicon, and reactivity of the mine tailings. The milling energy results in an increase in the fineness and the amorphous content, which do not appreciably increase beyond a disc milling duration of 8 minutes. The reactivity increases significantly beyond a certain threshold fineness and amorphous content. Cementitious pastes were prepared at 30% supplementary cementitious materials replacement level at a water-to-cementitious materials ratio of 0.40. No negative effects of the mine tailings were observed at early ages in cement pastes based on isothermal calorimetry and thermogravimetric analysis, demonstrating the potential for these materials to be used as supplementary cementitious materials.

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Natural radioactivity of a copper–zinc mine with a production facility in Türkiye and radiological consequences of usage of the tailing as a concrete additive

Parmaksız

Özkök

Ağuş

2023

J Radioanal Nucl Chem

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Reuse Potentials of Copper Mine Tailings in Mortar and Concrete Composites

Cited by 30 publications

References 37 publications

Investigating the suitability and cost-benefit of copper tailings as partial replacement of sand in concrete in Zambia: an exploratory study

Investigating the suitability and cost-benefit of copper tailings as partial replacement of sand in concrete in Zambia: an exploratory study

Mechanically activated mine tailings for use as supplementary cementitious materials

Natural radioactivity of a copper–zinc mine with a production facility in Türkiye and radiological consequences of usage of the tailing as a concrete additive

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