Field application and effect evaluation of different iron tailings …

Therefore, there is an urgent need to develop cost-effective tailings utilization technologies. The iron tailings are often used to make ceramsite, cement and other building materials ... the results show that soil–cement mixtures with iron ore tailings can be an excellent alternative as a pavement material. The addition of 10% and 20% of ...

(PDF) Feasibility Study on the Use of Iron Ore Tailings as …

In this regard, waste marble powder used a filler material replacing a smaller constant portion of cement, dumped iron ore tailings (IOT) were used as a partial replacement for fine aggregate in ...

Rheological and mechanical properties of full-tailings …

According to the testing and calculation method for the modulus of graded sand used in cement concrete, the fineness of the iron tailings sand used in this study reached the modulus of only 0.1, which did not meet the standard gradation of building sand. It was more reasonable to use particle size distribution to characterize its particle …

Investigating the hydration characteristics of iron tailings …

However, the hydration characteristics of ITP were still inferior to that of cement, making it difficult to eliminate the dilution effect caused by substituting cement with iron tailings [15].In reality, the dilution effect actually increases the effective water-to-cement ratio, disrupts the pore structure, enhances porosity, and reduces the strength …

Concrete Made with Iron Ore Tailings as a Fine Aggregate: …

When compared to reference concrete, the TS shown by the concrete with iron ore tailings aggregate improved by 4.8% with age . However, because of the greater fines content, the concrete with iron ore tailings aggregate would need more water to mix, which weakens the link between the aggregate and cement paste, and lowers the TS .

Cumulative Deformation and Damage Evolution of Fiber Cement…

Using polypropylene fiber and cement to modify iron tailings and in road engineering is an efficient way to utilize iron tailings as a resource. Dynamic triaxial tests were used to investigate the cumulative deformation and damage evolution of fiber cement–modified iron tailings (FCITs) with different fiber contents ( W f ) and dynamic …

Study on the effect of stress path on the deformation and …

Therefore, this paper uses polypropylene fiber and cement modified iron tailings sand to conduct an in-depth study on the evolution law of deformation and non-coaxial angle of fiber cement modified iron tailings sand under different stress paths. The test results can provide a theoretical basis for the application of FCIT in roadbed …

Effect of iron ore tailings as partial replacement to fine …

The findings indicate that concrete with 35% iron ore tailings replacement performs similarly to natural sand concrete and it can be used in engineering. Xiaoyan et al. experiments examined how IOT size affects plastic viscosity of mortar and tensile characteristics. Mortar using IOTs as aggregates can achieve tensile and compressive …

Utilization of iron ore tailings as fine aggregate in ultra …

Natural sand and iron ore tailings were used as aggregates. The natural sand was originally excavated from the lower reaches of Yangtze River and had an apparent density of 2.63 g/cm 3.The tailings were obtained from the local iron and steel industry and had an apparent density of 2.62 g/cm 3.The chemical composition of the …

Preparation of Mineral Admixture from Iron Tailings with …

Iron tailing solid waste not only has a high annual output but also has a low comprehensive utilization rate. Low utilization rate of iron tailings seriously restricts the development of comprehensive utilization of solid waste. In order to prepare an iron tailings-based ternary solid waste admixture and to verify its application to concrete, …

Response Surface Design Models to Predict the Strength of Iron Tailings …

Tailing storage facilities are very complex structures whose failure generally leads to catastrophic consequences in terms of casualties, serious environmental impacts on local biodiversity, and disruptions in the mineral supply. For this reason, structures at risk must be reinforced or decommissioned. One possible option is its reinforcement with …

Utilisation of iron ore tailings as aggregates in …

Abstract. Sustainable handling of iron ore tailings is of prime concern to all stakeholders who are into iron ore mining. This study seeks to add value to the tailings by utilising them as a replacement for …

Concrete Made with Iron Ore Tailings as a Fine Aggregate: …

The need for low-cost raw materials is driven by the fact that iron ore tailings, a prevalent kind of hazardous solid waste, have created major environmental issues. Although many studies have focused on using iron ore tailing (IOT) in concrete and have reported positive results, readers may find it difficult to accurately assess the …

Mechanical Properties and Hydration Mechanism of Iron Tailings–Cement

The preparation of cement-based supplementary cementitious materials is an important method for the efficient use of iron tailings and the reduction in CO2 emissions. The aim of this study is to improve the reactivity of iron tailings by mixing them with steel slag, slag, and fly ash through orthogonal tests to solve the problem that iron tailings …

Utilization of tailings in cement and concrete: A review

One of the advantages of cement and the cement concrete industry in sustainability is the ability to utilize large amounts of industrial solid wastes such as fly ash and ground granulated blast furnace slag. Tailings are solid wastes of the ore beneficiation process in the extractive industry and are available in huge amounts in some countries. This paper …

Review Utilization of tailings in concrete products: A review

The physical and chemical properties of tailings used as fine aggregate in concrete directly affect the mechanical properties of concrete. The most important of …

Basic characteristics and environmental impact of iron ore tailings

Iron ore tailings (IOTs) ... With a great number of particles whose size is less than 5 μm, ground IOTs can be used to fill the voids in the cement powder packed structure, so as to make the structure more closed. The closely packed structure can reduce the water-cement ratio of the initial slurry, ...

Iron Concentrate

Iron Concentrate is created by purifying Crushed Iron Ore. This can be done in one of two ways: either dry or wet purification, each of which can be performed using one of two crafting stations. The crafting stations come with different ratios, labor cost and time. The process to make Iron Concentrate also gives a by-product of either …

Effect of Iron Tailings as Fine Aggregate and Mineral …

by using iron tailings to completely replace natural sand, whereas that of concrete with a low water/cement ratio had a slightly decrease. For ultra-high strength concrete, the iron tailings had little eect on concrete strength when its content was less than 20%, beyond this content, the strength decreased almost linearly (Zhao et al., 2014).

Experimental Research on Performance of Road Base with Cement

In this study the iron tailing was tested whether it can be used in the civil construction, Furthermore, specimen were made to test the mechanical properties of cement mortar with iron tailings ...

Mechanical Properties and Microstructure Analysis of Cement …

In order to study the feasibility and sand substitution mechanism of cement mortar mixed with iron ore tailings (IOT), iron ore tailings cement mortars (referred to as IOTC) with IOT content of 0%, 25%, and 50% were made and tested. First, the basic properties of IOT used were measured to verify the theoretical feasibility. Second, the …

Stabilization of iron ore tailings with cement and bentonite: …

The abundance of mining activities continuously increases mine wastes/tailings that require storage/disposal. It is well understood that the accumulation of tailings around mines, and consequently, their spreading in the environment could cause serious ecological hazards. Reuse and recycling of mine tailing materials, in construction …

Maximizing the pozzolanic potential of superfine iron tailings …

Some iron tailings' disadvantages pose challenges in their reuse processes as backfill materials, especially for superfine tailings. With the development of ball-milling and magnetic separation technologies for ore treatment, the resulting iron tailings become very fine, even with the 5–75 μm size (Quast and Skinner, 2020).These superfine …

Reutilizing Waste Iron Tailing Powders as Filler in Mortar to …

Tao and Dang believed that the content of iron tailings powder is low (less than 50%), and there is a positive correlation between concrete strength and content. If it exceeds 50%, the mechanical properties of concrete will decline. Iron tailings powder with a particle size less than 0.003 mm is often used as cementitious material.

Behaviour of Compacted Filtered Iron Ore Tailings–Portland Cement …

Failures of tailings dams, primarily due to liquefaction, have occurred in Brazil in recent years. These events have prompted the Brazilian government to place restrictions on the construction of new dams, as iron ore tailings deposited behind upstream dams by spigotting have been shown to have low in situ densities and …

Concrete Made with Iron Ore Tailings as a Fine Aggregate: A Step towards Sustainable Concrete

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The Influence of Iron Tailings Powder on the Properties on …

Iron tailings powder (ITP) is a kind of solid waste, which pollutes the environment, without any treatment. The application of ITP in cement concrete is a good choice. In this study, the influence of ITP on the flowability, compressive strength, chloride ion permeability and the attenuation of the performance of cement concrete during …