• Heavyweight Aggregates for Heavyweight Concrete Production

    Heavyweight aggregates as it can be seen from the name is an aggregate that posses relatively high density and it is fundamental in a situation that high density concrete is necessary. Generally, aggregates with specific gravity of 2400 Kg/m 3 and higher are considered to be heavyweight. The concrete density that can be obtained based on the ...

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  • Utilisation of iron ore tailings as aggregates in concrete

     · The higher content of fines in the iron ore tailings aggregates concrete will increase the demand for water in the mix and this will reduce the bond strength existing in the aggregate–cement paste, leading to a reduction in tensile strength …

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  • Reconstruction of broken Si-O-Si bonds in iron ore ...

     · This paper reports a study on the reconstruction of broken Si-O-Si bonds in iron ore tailings (IOTs) in concrete. Limestone and IOTs were used to investigate the influence of different types of coarse aggregates on the compressive strengths of concrete samples. The differences in interfacial transition zones (ITZs) between aggregate and paste were analyzed by scanning electron …

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  • Effect of Replacing Sand by Iron Ore Tailings on the ...

    sand partially or completely in cement concrete by iron ore tailing, which is a waste from the iron ore industry and which has disposal problem leading to environmental pollution, is investigated. Cement concrete cubes and reinforced concrete ... coarse aggregate (kgf) Water (kgf) 0 . 4.425 . 6.06 .

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  • An Experimental Study on Partial Replacement of Coarse ...

    Iron slag can also be used as coarse aggregate in concrete. The growing concrete of resource depletion has challenge many engineers and researchers seek and develop new to materials for construction, this include the use of by-product and industrial waste in building construction. Many of these by products may serve as aggregate in concrete.

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  • Experimental Investigation Of Coarse Aggregate With Steel ...

    concrete and natural aggregate concrete, in high strength concrete series. Slag is a waste metallic material which might have long term delayed reactions, further experiments would be necessary to evaluate the durability of concrete made by steel slag aggregates. The following size of slag available from JSW Steel Ltd,0-4mm,4-

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  • Reuse of iron ore mineral wastes in civil engineering ...

     · Fig. 5, represents a typical particle size distribution of overburden material from the waste dumps of respective iron ore mines. A volume equivalent of approximately 50% of the total is within the usable range as aggregates for making of concrete cubes.

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  • Utilisation of iron ore tailings as aggregates in concrete

    The aim of this paper is to study the feasibility of using the iron ore tailings as both fine and coarse aggregates in making concrete. The paper evaluates the technical and environmental characteris-tics of the concrete with the main concern of recycling and adding economic value to the iron ore

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  • Characterization of Iron Ore Tailings as Fine Aggregate

     · Keywords: concrete-making material; fine aggregate; iron ore tailings; microscopy of material; sustainability; waste material. Date: 3/1/2020. Abstract: Iron ore tailings (IOTs) are common industrial solid waste products which are generated in enormous quantities during the production process of iron ore.

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  • An Experimental Study on Utilization of Iron Ore Tailings ...

    In this study, finely powdered waste glass from industries and Iron Ore Tailings (IOT) produced from mining areas are used as a partial replacement of cement and fine aggregates in concrete respectively. This work examines the possibility of using Glass powder and iron ore tailing as a partial replacement of cement and fine aggregate in concrete.

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  • Assessment of Mechanical and Durability Properties of High ...

    Abstract-- This paper investigates the suitability of using iron ore tailings (IOTs) and crushed waste rock (CWR) as fine and coarse aggregates to prepare high strength concrete (HSC) with 28-day target compressive strength of 80 MPa. This experimental investigation was carried out on four series of

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  • Effect of Iron Ore Tailing on the Properties of Concrete

    iron ore tailing (IOT) as fine aggregate would turn this waste material into valuable resources, reduction in the strain on the supply of natural sand, and economy in concrete production. World production averages one billion metric tons of raw ore annually.

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  • The Utilization of Waste as Iron Ore in Making Concrete ...

    The Utilization of Waste as Iron Ore in Making Concrete Aggregate Quality K.300 Concrete is an manmade building material that looks like stone. Concrete is a composite material consisting of coarse-grained material (aggregates or fillers) that is embedded in a solid matrix of material (cement or binder) that fills the space between the ...

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  • Use of Steel Slag in Concrete as Fine Aggregate

    fine aggregate in concrete mixes. A. Materials 1. Coarse aggregate Limestone normal aggregate of local sources was used in the preparation of all mixes. Gradation of this was obtained following the ASTMC136 standard procedure. It was found to be well graded and within ASTMC33 grading requirements for coarse aggregates of nominal maximum size 25 ...

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  • Replacement of Course and Fine Aggregates in Concrete by ...

    • Possibility of using waste iron ore slag & tiles as an alternative construction material will be investigated by conducting different tests on prepared specimens, it is 1.2 Materials Used The materials such as OPC 53 Grade Cement Sand Coarse Aggregate Iron ore slag and Mangalore tiles Water

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  • A Study on Compressive Strength of Concrete by Partial ...

    studies shows that agriculture waste coconut shell can also are used as coarse aggregate for concrete. Properties of Coconut Shell . 1. Coconut shell has high strength and modulus properties. 2. It has added advantage of high lignin content. High lignin content makes the composites more weather resistant. ...

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  • EFFECT OF PARTIAL REPLACEMENT OF COARSE AGGREGATE …

    Iron ore, coke and ... different mixes are cast, waste crushed tiles are used to partially replace the coarse aggregate by 10%, 20% and 30% and GGBS is used to partially replace the cement by 20%,30% and 40%. A total of 9 types of mixes of M30 grade were prepared. ... concrete mix and to reuse the solid waste from construction again as a ...

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  • USE OF RED MUD AND IRON TAILINGS IN SELF …

    mm. The coarse aggregates, obtained from a local source, had a specific gravity of 2.65. The size fraction of the coarse aggregate used is extremely important for determining the optimum amount of paste content to obtain all the necessary characteristics of a flowing concrete. The fine and coarse aggregates were tested according to IS: 383-1970 ...

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  • Waste Products in Highway Construction

    a waste do not conflict with and are compatible with the properties of asphalt or portland cement, it is a po­ tential aggregate for asphalt or concrete mix. A waste may also be directly placed as a base course if it satisfies the base material specifications and leachate requirements.

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  • Lecture 4. Aggregates

    recycled concrete aggregate (RCA) when consisting primarily of crushed concrete or more general . recycled aggregate (RA) when it contains substantial quantities of materials other than crushed concrete. Currently, only the use of coarse aggregate derived from construction or demolition waste is recommended for use in new concrete construction.

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  • MECHANICAL PROPERTIES OF CONCRETE USING IRON …

    and without iron waste replacement. The concrete mixture consists of Portland cement, sand, coarse aggregates, iron waste, and water. The cubes were prepared to evaluate the concrete compressive strength and the beams were equipped to assess the flexural strength.

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  • Usage potential of recycled aggregates in mortar and concrete

    Usage potential of recycled aggregates in mortar and concrete Martinez-Lage et al. (2012) have reported a study on the behavior of concrete made with mixed recycled coarse aggregate, with a high percentage of fired clay (brick and similar) waste. De Brito et al. (2005) have reported that the decline in compressive strength in such concrete was ...

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  • Using Foundry Waste Materials in Concrete for a More ...

    One study by Torres et al. [6] generalizes the foundry waste for use in concrete in order to increase the recycling percentage, by reducing processing time/cost and using all the waste produced by the foundry industry. This was done by partially replacing both fine aggregate and coarse aggregate of concrete with lightly processed foundry waste.

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  • UG-Mat Mineral Processing Wastes | Recycled Materials ...

    However, the specific gravity or unit weight of waste rock from the mining of iron ore and taconite will be considerably higher than that of conventional aggregates. The specific gravity of waste rock can be expected to range from 2.4 to 3.0 for most rock types and from 3.2 to 3.6 for waste rock from iron ore and taconite minings.

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  • CHAPTER 1 COMPONENTS OF CONCRETE

    COMPONENTS OF CONCRETE Concrete is made up of two components, aggregates and paste. Aggregates are generally classi! ed into two groups, ! ne and coarse, and occupy about 60 to 80 percent of the volume of concrete. The paste is composed of cement, water, and entrained air and ordinarily constitutes 20 to 40 percent of the total volume.

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  • The Influences of Iron Ore Tailings as Fine Aggregate on ...

     · The present study looks for the feasibility of preparing UHPC with iron ore tailings (IOT for short) as fine aggregate. To enhance outstanding high performances, some influences on UHPC mortars were investigated such as different kinds of sands, different mix ratio of sands, and different largest particle size of fine aggregate. The results show that IOT have negligible poorer aggregate ...

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  • Sustainable use of mine waste and tailings with suitable ...

    Utilization of mine waste rocks and tailings in concrete as aggregates will help in sustainable . and greener development. The literature shows the potential use of iron ore tailings as a replacement of . natural fine aggregates. As natural sand reserves are d. epleting day by day, there is a need for substitution for . sand in concrete.

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  • Use of Blast Furnace Slag Aggregate in Concrete

    the other comprising granite stone as coarse aggregates. The compressive strength of BFS aggregate concrete is higher than that of the stone aggregate concrete at the age of 90 days. 1.3.Slag- Manufacturing and Types In the production of iron, iron ore, iron scrap, and fluxes (limestone and/or dolomite) are charged into a blast furnace along

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  • Experimental Study on Iron Ore Tailings and Bottom Ash as ...

    C. Coarse Aggregate PROPERTIES OF COARSE AGGREGATE Specific Gravity 2.67 Water Absorption 0.8% Bulk Density 1.324 kg/l %Voids 50.412% 28.66% D. Iron Ore Tailing As per table 4 of IS 383-1970 the iron ore tailing belongs to zone II. TABLE.4 PROPERTIES OF IRON ORE TAILING Specific Gravity 3.1 Water Absorption 6%

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  • (PDF) A STUDY ON PARTIAL REPLACEMENT OF COARSE AGGREGATE ...

    Abstract -Concrete is that the basic material in all the construction works and coarse aggregate constitutes nearly 60 to 70% of the combination but the procurement and therefore the generation of the natural coarse aggregate is being deficit day by day and that lead to the use of other alternative materials which are naturally available in India.

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  • USING IRON ORE WASTE AS AGGREGATE IN MAKING K. 300 …

    Iron stone coming from nature is a material alternative that can be used as rough aggregate in making concrete. This research was conducted by sieving iron ores with sieving particle sizes of 2mm, 2-5 mm, 5-8 mm, and 10-12 mm. The compressive strength test was conducted at 7, 14, and 28 days. The iron ore waste from iron processing can be used ...

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  • Iron Ore Waste As Coarse Aggregate

    Effect Of Partial Replacement Of Coarse. the solid waste from construction again as a material in the concrete to decrease the land fill of solid waste and decrease the scarcity of natural aggregates like gravel and sandOn the Other hand the GGBS is a byproduct in the manufacture of iron and the amounts of iron and slag obtained are of the same order Iron ore coke and

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  • Ferrous Sulfides in Aggregate Cause Rust Stains| Concrete ...

     · This might be difficult, as testing coarse aggregates for ferrous sulfides is not a requirement for meeting ASTM C33, "Standard Specifications for Aggregates." Nor is this particular reaction identified in ACI 221''s Table 1.1, which shows properties of concrete influenced by aggregate …

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