Experimental Study and Microscopic Analysis on Frost Resistance of Iron
Figure 8: Mass loss rate of iron ore tailings recycled aggregate concrete during F-T cycle: (a) the dosage of RCA is 30%; (b) the dosage of RCA is 50%. 0 25 50 75 100 125 150 175 200 225
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Development of green engineered cementitious composites using iron ore
Notable among the alternatives are to use iron ore tailing to manufacture bricks, ceramic tiles [4], as fine aggregate in mortar, and coarse aggregate in concrete [8, 20], and to produce ...
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An evaluation of iron ore tailings characteristics and iron ore
Impact tests were conducted using a specially made drop hammer impact device on concrete specimens (C60–C90) containing lean iron ore from mine waste as coarse aggregate to realize enhanced ...
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Utilization of iron tailings as aggregates in paving asphalt …
Test results showed that the designed micro-surfacing mix with iron ore waste can meet the requirements for use and the maximum content can reach 20% of total aggregates. Additionally, iron tailings were also used as coarse aggregate for stone matrix asphalt (SMA) in pavement upper layer.
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A state-of-the-art review
Partial replacement of coarse aggregate using waste glass in various percentages such as 10%, 15%, 20% and 30% waste glass in proportion of 90%, 85%, 80%, 75% and 70% granite. ... A study on suitability of iron ore overburden waste rock for partial replacement of coarse aggregates in concrete pavements.
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Complete Guide to Coarse Aggregate in Concrete …
People use artificial aggregates because they are made of materials that are good for the environment. They are made from ash, solid waste from power plants, rice husk ash, furnace slag, granite powder, iron ore slag, over-burned brickbats, and so on. Types of coarse aggregate: Fine vs Coarse Aggregate. What is the size of a fine …
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An evaluation of iron ore tailings characteristics and iron ore
However, in most previous researches, IOT mainly covers three categories: (i) iron tailings rock, used as coarse aggregate, of particle size >4.75 mm, is produced by mechanical crushing low-grade ore and wall rock. (ii) iron tailings sand, used as fine aggregate, particle size ranging from 0.16 mm to 4.75 mm, is produced by
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Experimental and Statistical Evaluations of Strength …
The present study focuses on preparation of geopolymer coarse aggregate (GCA) with optimum molarity of alkaline activator solution utilizing fly ash (FA) and iron ore tailing (IOT) waste.
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Paint booth waste as an alternative aggregate for the
In this sense, several studies have investigated the incorporation of different types of waste as aggregate substitutes such as: recycled tire rubber 15; iron ore waste 16; textile sludge 17 ...
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Effect of dumped iron ore tailing waste as fine aggregate …
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.
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Sustainable Use of Mine Waste and Tailings with Suitable …
3.3 Replacement for coarse aggregates . Yellishetty (2008) used iron ore waste from Goa and conducted an experimental study. In the concrete mix, 40% of coarse aggregates were replaced with iron ore tailings and concrete blocks were made for 28 days curing. It resulted in the compressive strength of 21.93MPa to that of granite …
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Mechanical properties and pore structure of recycled aggregate concrete
The application of IOTs in concrete can fix the issues related to the management of waste residue of iron ore, and alleviate the increasing scarcity of natural aggregates. ... Mechanical performance evaluation of concrete made with recycled ceramic coarse aggregates from industrial brick waste. Construct. Build. Mater., 165 (2018), pp. …
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Mechanical properties and pore structure of recycled aggregate …
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 ...
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Sustainable assessment and synergism of ceramic …
Iron tailings ne aggregate (IOTs-FA) with a neness modulus of 2.0 was provided by Liaoning One Cube Sand Industry Co., Ltd. The coarse aggregate, which has a par-ticle size range of 5 – 20 mm, is the iron ore waste stone coarse aggregate (IOTs-CA) provided by Liaoning Yicu Sand Industry Co., Ltd. The gradation curves of the ne
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Experimental study on use of construction and demolition waste as
Using RFA blended with river sand fractions as well as RFA with Iron Ore Tailings (IOT) fractions, have given good results to serve as fine aggregates to the extent of replacement levels in ...
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Utilization of iron ore tailings with high volume in green …
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 ground granulated blast-furnace slag (GGBFS) to prepare IOTs-based supplementary cementitious materials (SCMs). A concrete mix using IOTs-aggregate was also …
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(PDF) Iron Ore Tailings as Partial Replacement for Fine Aggregate …
Iron ore tailings (IOTs) are a form of solid waste produced during the beneficiation process of iron ore concentrate [7], and have been used by many researchers as a replacement for fine aggregate in concrete production [8][9][10][11], [12][13]–[16] This paper is about the review of various research works on the nature of IOT and its effects ...
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Valorization of Coalmine Overburden Waste Rock as Fine and Coarse …
Corrosion of rebars and metal inclusions has always been a concern for the construction industries looking for bulk utilization of the industrial waste as alternative of natural construction material. In the present study the performance of cement mortar incorporating coalmine overburden (OB) as fine aggregate, and cement concrete …
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Experimental study and statistical analysis of lean iron ore …
The crushed particle size of the lean iron ore coarse aggregate was 4.75–25 mm, thereby conforming to the requirements for continuous gradation; the physical and mechanical properties of the lean iron ore coarse aggregate are compared in Table 1 against the various specifications for coarse aggregates. The data in the table indicate …
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Performance of Ore Sand as Aggregate for Interlocking …
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 …
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Mechanical properties of recycled aggregate concrete …
Aiming to provide a cleaner option for waste concrete after fire, the viability of using waste concrete after fire as a substitute for coarse aggregate in the production of recycled aggregate concrete (RAC) was investigated and analyzed in detail. The failure mode, stress–strain behavior, mechanical properties and microstructure of the RAC ...
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Experimental Study and Microscopic Analysis on Frost Resistance of Iron
Freeze-thaw harm is the major factor that reduces the durability of hydraulic concrete buildings at high altitudes and in cold regions. To solve the durability problem of hydraulic buildings in alpine regions, the study prepared sixteen groups of concrete specimens with different replacement ratios of iron ore tailings and recycled aggregate …
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Iron Ore Tailings as Partial Replacement for Fine …
as waste products of the beneficiated iron ore and the estimated stripping ratio (waste/ore ratio) of the deposit would amount to approximately 28 million tons [27]
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Geopolymer-Based Artificial Aggregates: A Review on …
1. Introduction. Natural crushed rocks or stones are commonly used as coarse aggregates in the production of concrete. Various types of natural rocks (e.g., limestone [], basalt [], and gravel []) have been employed in the concrete industry based on local geological circumstances.However, increasing construction demand and rapid …
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Effect of a novel spherical tailings aggregate on the macro
However, the iron tailings stone used as coarse aggregate in the existing studies are not the main iron ore waste (the main waste is tailings sand). ... Tan et al. [45] prepared pervious concrete with a target porosity of 8%–30% using iron tailings as coarse aggregate and investigated the relation between porosity and compressive strength ...
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Utilization of steel slag as partial replacement for coarse aggregate
The slag as coarse aggregate, in addition to the natural coarse and fine aggregate are within the limits according to their maximum aggregate size. The mechanical properties of natural and slag coarse aggregate are also within the limits as shown in Table 1. The specific gravity test on the sand, coarse aggregate, and steel …
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Coarse aggregate used in the experiment: (a) lean iron ore coarse
Impact tests were conducted using a specially made drop hammer impact device on concrete specimens (C60–C90) containing lean iron ore from mine waste as coarse aggregate to realize enhanced ...
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Sustainability | Free Full-Text | Application of Aggregates …
In the current century, urbanization and the development of the construction industry have led to the generation of construction and demolition waste (CDW), imposing pressure on ecology and the environment. This has attracted the attention of industry personnel and researchers. This work discusses the current research on recycled …
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Evaluation of the performance of iron ore waste as potential …
The objective of this work is to evaluate of the Performance of iron ore waste as potential recycled aggregate for Micro-surfacing type cold asphalt mixtures. This study is the continuation of the study carried out by [36], [39], [40], Apaza et al. [43], where preliminary results were obtained on the functional characteristics of the iron ore ...
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Evaluation of the Performance of iron ore waste as
In terms of pavement performances, the asphalt mixtures with iron tailings coarse aggregates possessed a satisfactory high-temperature performance, but its low-temperature performance and moisture ...
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