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Toward sustainable remediation of oil sands fine Tailings …

Tailings management regulations (e.g., Directives 074 and 085) were put into place as a response to increasing concerns over the risks and uncertainties associated with tailings ponds management and increases in oil sands tailings inventory (Alberta Energy Regulator, 2009, 2017).Since then, oil sands operators have attempted to reduce tailings generation and …

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The Effect of Copper Tailings Sand on the Workability and

Concrete materials are widely used in engineering projects, with fine aggregates (sand) being a key component currently in short supply. Copper tailings sand, a waste by-product of copper mining, accumulates in large quantities in tailings dams. Recycling and reusing this waste sand is crucial for environmental sustainability. This paper investigated the incorporation …

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Oil sands tailings ponds

The Oil sands tailings ponds are settling ponds that contain the waste byproduct of oil sands extraction and upgrading. They are a mix of water, sand, silt, clay, unrecovered hydrocarbons, and other contaminants. The management of …

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Recent practices in mine tailings' recycling and reuse

Mixed with sand and cement, tailings can be employed in the construction industry to provide floor or retaining wall support. As a result of the mineralogical characterization of clay-rich tailings, it can be considered as a primary input material for manufacturing bricks, floor tiles, cement, porcelain, and vitreous ware, especially ceramics ...

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Rheological and mechanical properties of full-tailings backfill

On the basis of hydration by amorphous SiO 2 and Al 2 O 3 on the surface of ultrafine iron tailings powder (UITP) and its synergistic hydration with slag powder, we used a …

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Comparative mechanical properties of conventional concrete …

The tailings of the gold mining process have a direct environmental impact on the land selected for disposal and the surrounding water bodies. Thus, the use and better disposal of the tailings have been analyzed from an environmental perspective. The tailings were introduced in the life cycle assessment as a replacement for river sand.

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Reuse and stabilization of sulphide mine tailings as fine …

Mining generates huge quantities of solid wastes in the form of waste rocks and mine tailings (Benarchid et al., 2019).The mine tailings are fined grained slurries after processing the ore (Simonsen et al., 2020).As the high-grade ores get depleted, the use of technology has enabled the processing of low-grade ores thus increasing the volume of tailings generated …

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Oil sands: backfill for tailings management

with scoops to extract the oil sands and it is then transferred to facilities where the bitumen is separated from the sand prior to the bitumen being upgraded and refined. The other 80% of the oil sand reserves in Canada are at a depth too far from surface, greater than 75 m, to use truck and shovel, and hence make use of the SAGD (in situ) method.

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Bio-cementation of tailings sands using ultraviolet-induced …

The disposal of tailings in a safe and environmentally friendly manner has always been a challenging issue. The microbially induced carbonate precipitation (MICP) technique is used to stabilise tailings sands. MICP is an innovative soil stabilisation technology. However, its field application in tailings sands is limited due to the poor adaptability of non-native urease …

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Enhancing sustainable subgrade engineering using soil tuff …

Research has been conducted to enhance the usage and treatment/purification of tailings sand. For example, Ginocchio [11] compared bioavailability and bioenrichment in agricultural soils mixed with copper-rich pollutants and copper concentrates, considering tailings wastes for agricultural cultivation. Xu et al. [12] explored the feasibility of recycling tailings …

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Strength and Microstructure of Concrete with Iron Ore Tailings …

River Sand is one of the basic ingredients used in the production of concrete. Consequently, continuous consumption of sand in construction industry contributes significantly to depletion of natural resources. To achieve more sustainable construction ... Strength and Microstructure of Concrete with Iron Ore Tailings as Replacement for River Sand.

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Development of slag-based filling cementitious materials …

A new type of slag-based filler cementitious material applied with ultrafine tailings has been successfully developed. Combining orthogonal tests and neural network prediction, …

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Experimental study on fiber-reinforced cement tailings sand …

To address the problem of permeation of tailings pond initial dams rockfill dams, fiber-reinforced cement tailings sand-based grouting (FRCTG) material, which can be used for rockfill dam reinforcement, was prepared by selecting ordinary portland cement (OPC), iron tailings sand (ITS), basalt fiber (BF), fly ash (FA) and water as the raw materials.

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CO2 mineralization and utilization by tailings sand in China …

The use of tailings sand for CO 2 mineralization and utilization (CMU) has been emerging globally, offering a sustainable solution for repurposing tailings sand while establishing a stable carbon sink. Despite several reports that evaluated process performance and project benefits, existing research has not delved into the project layout focusing on the tailings pond …

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Failures of sand tailings dams in a highly seismic …

Chile is one of the main copper producers in the world. It is located in a geographical area where mega-earthquakes occur and this fact, together with the development of larger and higher sand tailings dams (with some facilities …

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(PDF) Iron Ore Tailings as Fine Aggregate Replacement in …

River Sand is one of the basic ingredients used in the production of concrete. Consequently, continuous consumption of sand in construction industry contributes significantly to depletion of natural resources. ... Keywords-- Normal River Sand, Iron Ore Tailings, Beneficiation, Mining Waste, Concrete I. INTRODUCTION Essentially, concrete is a ...

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(PDF) Use of Gold Mine Tailings in Production of …

River Sand is one of the basic ingredients used in the production of concrete. Consequently, continuous consumption of sand in construction industry contributes significantly to depletion of natural resources. To achieve more …

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Application of mine tailings sand as construction …

Fillers are important ingredient in bituminous mixture; they are inert materials that pass a 75-micron sieve [46]. Fillers may be limestone, cement, stone dust, ... use of tailings as a sand replacement in concrete mixtures. Several studies reported the effects of iron tailings as a sand substitute in concrete. Otieno and Odoro [31]

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Cycloning of Tailing for the Production of Sand as TSF …

Hydro-cycloning of plant tailings is an often used tool to produce relatively coarse free draining sand (cyclone underflow) for Tailing Storage Facility (TSF) embankment construction.

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Effect of Replacing Sand by Iron Ore Tailings on the …

Furthermore, the fine particles less than 75m in iron ore tailings sand are beneficial to the reduction of expansion induced by ASR. Sujing Zhao et al. [3] have explored the possibility of using iron ore tailings to replace natural aggregate to prepare UHPC (ultra high performance concrete) under two different curing regimes.

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Development of sustainable concrete using iron ore tailings as sand

IJESC, 2019. Iron Ore Tailings (IOT) are the waste slag resulted from iron ore mines. Large amount of Iron Ore Tailings (IOT) have been generating every year posing serious environmental problems, large production of cement everyday resulting the emission of CO 2 and increase in the consumption of river sand for construction activities making the river beds over-exploited.

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The mix design method of semi-empirical gold tailings sand …

The integration of manufactured sand into Ultra-High Performance Concrete (UHPC) remains limited, and the design methodology for UHPC mixes is not yet fully developed. This study proposes a semi-empirical gold tailings sand UHPC mix design method based on the Modified Andreasen and Andersen (MAA) model as an example of bulk solid waste gold tailings sand.

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SAFETY DATA SHEET Mineral Sands Tailings

Mineral sands tailings contain naturally occurring radioactive elements of the uranium and thorium series. The mineral sand tailings produced by RZ Resources Ltd contains low concentrations of these impurities with a typical specific activity of approximately 2 Bq/g of combined uranium …

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Preparation and Properties of Concrete Containing Iron Tailings …

High performance concrete was prepared by using iron tailings mixed with manufactured sand. Effects of the content of iron tailings on the performance of concrete were studied. The results show that the slump of concrete containing iron tailings is equal to concrete with river sand when the content of iron tailings is 60%. With the increase of the content of iron tailings, compressive …

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Exploring microstructure and mechanical features of coupled

Therefore, it is an urgent necessity to further study these features as soon as possible, including different recipes regarding cost/performance. The current research's purpose is to explore the replacement of standard sand with tailings to make concrete. A total of six gradients were set between 0 % and 100 % TR in order to discover the ...

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Environmental risk and source analysis of heavy metals in tailings sand …

To investigate the ecological risk, the modes of occurrence, and pollution sources of heavy metals in the tailings sand and surrounding soils of Huangshaping mining area, a total of six tailings ...

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Application of mine tailings sand as construction material

As there is a tendency of replacing sand with tailings material in a concrete mixtures used for brickmaking in U-rich gold-mine areas in South Africa [39, 40], ...

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Influence of fiber type and content on the flexural strength …

Ingredient characteristics. Using lithium feldspar tailings to prepare CTBC is an effective way of resource recovery. In mine exploitation, tailings accumulation has adverse impacts like occupying land and causing soil and dust pollution. ... To establish a matching model for the load-deflection curves of fiber-doped tailings sand filler, it is ...

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Research on the high-temperature resistance of recycled …

DOI: 10.1016/j.conbuildmat.2022.126889 Corpus ID: 247096794; Research on the high-temperature resistance of recycled aggregate concrete with iron tailing sand @article{Zhu2022ResearchOT, title={Research on the high-temperature resistance of recycled aggregate concrete with iron tailing sand}, author={Qianyong Zhu and Yisong Yuan and Ji-hao …

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Strength and Microstructure of Concrete with Iron Ore Tailings …

Two iron mine tailing sands and manufactured sands with different fineness modulus are studied and they are mixed into four mixed sands which fineness modulus is 2.6 similar to 3.0 by controlling ...