aggregate iron ore

The testing results showed that the use of recycled coarse aggregate (RCA) led to the reduction of strength of concrete, but this strength loss can be compensated by adding iron ore tailings (IOTs ...

The search for alternatives that can replace conventional materials extracted from nature is crucial for environmental sustainability. This is especially the case for construction and geotechnical engineering, as this sector is a major consumer of the planet's natural resources. This paper explores the use of ore sand (OS) tailings with fine …

The concrete mix is designed as 1:1.62:3.25 (cement: sand: coarse aggregate) with a water-to-cement ratio (W/C) of 0.48. A total of six (6) mixes are developed by replacing 0%, 10%, 20%, 30%, 40% ...

Mined mineral resources in Arizona (Fig. 1) range from metals, chiefly copper with minor production of gold, silver, iron ore, lead and zinc (Fig. 2), to a broad suite of industrial minerals dominated by aggregate (sand, gravel, and building stones) complemented by cement and lime, flagstone, gemstone, cinders, and gypsum, among other mineral ...

The article conducts a study on the iron tailings sand concrete's fracture behaviour based on the double-K criterion. Five sets of standard three-point bending beam specimens of concrete with 0% ...

Using iron ore tailings (IOTs) as the main aggregate for concrete will not only save crushed stone mining but will also reduce the environmental impact of IOTs. A …

Abstract. In this study, the potential of converting iron ore tailings (IOTs) into sustainable building materials was explored. IOTs were combined with fly ash (FA) and …

AbstractIron ore tailings (IOT) are the by-products of iron ore beneficiation, and these tailings are disposed of in several tons annually in quarries, landfills, and tailings dams, causing environ...

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 …

A-Z Guide to Screening Ore, Rock & Aggregate A simple definition of a "screen" is a machine with surface(s) used to classify materials by size. Screening is defined as "The mechanical process which accomplishes a division of particles on the basis of size and their acceptance or rejection by a screening surface". Knowledge of screening …

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 behaviors …

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. …

Concrete by volume comprises of 70% aggregate, which include both coarse and fine aggregate. Iron ore tailings can be considered as fully or partial replacement …

Abstract: 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 ...

The study found that using iron ore tailings as fine aggregate to produce concrete is an effective solution. This aggregate concrete exhibited good mechanical strength and even in the case of compressive strength, there was an improvement of 11.56% over conventional aggregate concrete. This blog seeks to add value to the …

In the present investigation suitability of iron ore tailings (IOT) as an alternative to river sand for fine aggregate is examined. As part of this study, extensive experimental investigations were conducted for characterisation of properties of IOT, determination of properties of mortars and concrete using IOT as fine aggregate.

As shown in Figure 3, the slumps and liquidity of concrete mixed with iron ore tailings decreased compared with that of normal concrete under the same condition (water, mixture ratio, admixture, …

iron-ore mine tailing as aggregate. Raquel P. Batista 1, Juliana O. Costa 1*, Paulo H. R. Borges 1, Flávio A. dos Santos 1 and Fernando S. Lameiras 2.

For example, iron ore tailings was used by many researches to substitute fine aggregate in concrete [19][20] [21] [22], the findings of these investigations showed that concrete formulated with ...

Replacement of Fine Aggregate by Iron Ore Tailing (IOT) in Concrete for Sustainable Development. Geena George. Engineering, Environmental Science. E3S Web of Conferences. 2023. An increase in iron ore processing to meet the global demand has resulted in the generation of billions of tons of iron ore tailings (IOT).

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 …

The iron ore tailings aggregates concrete exhibited a good mechanical strength and even in the case of compressive strength, there was an improvement of 11.56% over conventional aggregates concrete.

Arbuscular mycorrhizal (AM) fungi play an important role in organic matter (OM) stabilization in Fe ore tailings for eco-engineered soil formation. However, little has been understood about the AM fungi-derived organic signature and organo-mineral interactions in situ at the submicron scale. In this study, a compartmentalized cultivation system was used to …

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 aggregates in concrete. A concrete mix of grade 40 …

Iron ore tailings. Iron ore tailings (IOT) were obtained from one source in Johor; a southern. Mixture proportion. Table 3 shows mix proportions design in accordance to the exposure classes of BS EN206-1 [24] standard specification for grade C37 concrete. The coarse aggregate used was 10 mm single size. The designed water/cement ratio …

A number of researchers have used iron ore processing waste as a fine aggregate for concrete up to 40% [13]. Another way of recycling waste of ore production is the use of high-magnesium and low ...

Keywords: Mine waste, Iron-ore tailings, Fine aggregate, Concrete, Mortar, Masonry 1 INTRODUCTION The construction industry caters to the demand for new buildings and other infrastructure projects. Natural river sand, which is an essential construction material, has become a scarce commodity in many parts of the world.

This research discusses the behavior of ultra-high-performance concrete (UHPC) specimens made with dumped waste iron ore tailing (IOT) as a fine aggregate in the mix by 30% and 40% in volume fraction along with mono and hybrid fiber incorporation. Basalt fibers of 1%, 2%, and 3%, polypropylene fibers of 0.18%, 0.20%, and 0.22%, and …

An incremental increase of 10.3 % was observed in the case of split tensile strength for 60 % replacement of fine aggregate with iron ore tailings. Discover the world's research 25+ million members

It was found that the iron ore tailings may be utilised for complete replacement for conventional aggregates in concrete. The iron ore tailings aggregates concrete exhibited a good mechanical strength and even in the case of compressive strength, there was an improvement of 11.56% over conventional aggregates concrete.

The purpose of this study was to assess the performance of introducing polypropylene (PP) fibers into recycled aggregate concrete containing iron ore tailings (TRAC). Thus, we prepared four different concretes, including natural aggregate concrete (NAC), recycled aggregate concrete (RAC), TRAC and fiber-reinforced tailings recycled …

ore tailings and bottom ash as fine a ggregates in. concrete. They r eplaced fine aggregate with 10%, 20%, 30%, 40%, and 50% iron ore tailings and with 10, 20, 30, 40, and 50% bottom ash for ...

Concrete Made with Iron Ore Tailings as a Fine Aggregate: A Step towards Sustainable Concrete. September 2022. Materials 15 (18) DOI: 10.3390/ma15186236. License. CC BY 4.0. Authors: Mohamed...

Examples of synthetic aggregates include steel, iron, boron frit, Ferrophosphorus. Furthermore, coarse heavy aggregate consisting of crushed ore, synthetic products or mixtures of both while fine heavy …

The fine iron ore tailings as obtained from the mine without additional processing are named IOTs-Fine in this study. The coarse IOTs are passed through sieves with openings of 1180 μm, 600 μm, and 425 μm (plus bottom pan) and the IOTs passing through sieve are called IOTs-1180, IOTs-600, and IOTs-425, respectively, such that the …

The present study investigates the effects of utilizing dumped waste as a practical resource for making concrete. 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 different proportions. Since …

Iron is the world's most commonly used metal - steel, for which iron ore is the raw material, representing almost 95% of all metals used per year (Ramanaidou and W ells 2014). It is used