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Recycling of steel slag aggregate in portland cement ...

2021-2-1  Because of the unique physical and chemical characteristics of steel slag, steel slag aggregate (SSA) has been recycled into Portland cement concrete as a substitution for natural aggregates as a sustainable and low impact design solution by reducing the use of natural resources and the landfills for disposal.

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Geotechnical Behavior of Recycled Copper Slag-Cement ...

2016-4-9  Copper slag is a by-product obtained from production of copper metal. As copper slag contains silica and alumina, it may exhibit pozzolanic property, and hence it may be re-use in ground improvement applications as a partial replacement of cement. Present study evaluates systematically the possible pozzolanic property of copper slag as well as studies the effect of copper slag on engineering ...

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Geotechnical Behavior of Recycled Copper Slag-Cement ...

In addition to the environmental and economic benefits of cement usage reduction, using harmful waste materials such as recycled polypropylene fiber, wood ash, and copper slag enable their safe ...

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Use of Recycled Copper Slag in Cement-Treated Singapore ...

Copper slag is a by-product obtained during the matte smelting and refining of copper. Singapore imports huge amount of copper slag to be used as abrasive material for ship clearing and repairing, and resulting in used copper slag as waste material. It has been estimated that 300,000 tonnes of copper slag needs to be disposed annually.

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(PDF) Influence of Pozzolan, Slag and Recycled Aggregates ...

2021-7-27  In MT mixtures, the partial cement replac ement by fly ash and 20% of recycled con- crete aggregates, mixture MT250-FA-RA, lead s to down to 44% less water absorption, and

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Role of lime, fly ash, and slag in cement pastes ...

2019-3-20  The study suggests that recycled concrete fines can be incorporated into cementitious composites in large amounts and even improve their properties, especially when blended with fly ash or blast furnace slag. Substitution of Portland cement in the studied pastes by recycled concrete led to a compressive strength deterioration, but also a ...

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(PDF) Role of lime, fly ash, and slag in cement pastes ...

In the presented research, Portland cement pastes containing 50% finely ground recycled concrete, blended with lime, fly ash, or blast furnace slag, were studied.

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Using Slag Cement in Sustainable Construction

2017-8-5  Slag cement is a byproduct of iron production in a blast furnace. It is ahydraulic cement that can replace between 20 to 80 percent of the portlandcement in concrete (depending on application, see Table 1) and helps makesconcrete even greener. Slag cement contributes the following sustainability ben-efits to concrete:

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Beneficial use of recycled materials in concrete mixtures ...

The recycled materials used in this study consisted of ground granulated blast furnace slag (GGBFS), recycled concrete aggregate (RCA) and crushed waste glass. The GGBFS, or slag cement, was used as a replacement for the cement. The RCA and waste glass were used to replace the coarse and fine aggregates, respectively.

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Slag Cement - an overview ScienceDirect Topics

Portland slag cement, which is most commonly used in the region, was used for the study complying with IS 455 [21].Its specific gravity was 2.87 having initial and final setting times of 70 minutes and 480 minutes, respectively.For fine aggregate, natural sand was used, having a maximum size of 4.75 mm.Its specific gravity was 2.72, conforming to Zone-III, and having a fineness modulus of 2.313.

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Alkali-Activated Slag Concrete with Recycled Aggregate ...

This paper evaluates the long-term mechanical properties (up to 1 year) of alkali-activated slag concrete produced with recycled coarse aggregate (AAS-RA) and natural coarse aggregate (AAS-NA). The AAS-RA achieved a compressive strength of 35.20 MPa at 28 days and improved to 37.52 MPa at 365 days.

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Use of recycled copper slag for blended cements - de

2008-1-28  Copper slag is a by‐product generated during smelting to extract copper metal from the ore. The copper slag obtained may exhibit pozzolanic activity and may therefore be used in the manufacture of addition‐containing cements. In this paper the effect of the incorporation of the copper slag in cement is

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Recycling of Steel Slag Aggregate in Portland Cement ...

2020-10-2  Because of the unique physical and chemical characteristics of steel slag, steel slag aggregate (SSA) has been recycled into Portland cement concrete as a substitution for natural aggregates as a sustainable and low impact design solution by ...

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Slag recycling - recovery

In Brazil, by-products from the steel industry consist of 42 % blast furnace slag, 27 % steelworks slag and 31 % other by-products such as dusts, sludges, etc., according to figures from the Brazil Steel Institute for 2017. 92 % of the approximately 8.8 Mta of blast furnace slag was recycled in 2017, of which 99 % went to cement production.

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Effect of Copper Slag and Recycled Aggregate in the ...

2018-7-30  Copper slag must have a sufficient quantity of lime to reach the required rate of hydration and to achieve the required early age strength. Therefore, in this case, in order to increase its Pozzolanic reaction, hydrated lime was added up to 2.0% to the weight of cement. Copper slag has high concentrations of SiO2 and Fe2O3 compared with OPC.

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Effect of Recycled Aggregate and Iron Slag in Concrete ...

2020-1-22  recycled. They even pollute the atmosphere and are hard to dispose. In this work, the effect of iron slag and recycled aggregate in the concrete were studied. The compressive strength of the concrete cubes containing Iron slag(20,40,60,80,100%) and recycled aggregate(25,50,75,100%) as partial replacements of fine

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Use of Recycled Aggregate as Alkali Activator to Enhance ...

The aim of the research is to achieve the strength development performance of high-volume slag concrete or zero-cement concrete with 0.45 of W/B by incorporating of recycled aggregates as a cost-effective alkali activator. Based on the blast-furnace slag (BFS) based cement, like an alkali activated slag (AAS), recycled aggregates were replaced ...

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How is slag disposed of? – Mvorganizing

2021-1-29  Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a portion of portland cement. Once the slag has been cooled and ground to a usable fineness it is stored and shipped to suppliers throughout the United States.

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Nucor Steel - Slag Cement Case Study

2021-4-12  The purpose of the tanks was to cool the recycled water during the manufacturing process. The 4000 psi lightweight concrete mixture had a 30% slag cement replacement with 640 lb (290 kg) of total cementitious material, 48% lightweight aggregate, and 52% fine aggregate.

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[PDF] Manufacturing Zero-Cement Bricks by Replacing

In this study, a zero-cement brick is manufactured by replacing cement with recycled aggregates and blast furnace slag powder. Experimental tests were conducted with standard sized samples of 190 × 57 × 90 mm (KS F 4004), and this manufacturing technique was simulated in practice. Results showed that the zero-cement brick with 0.35 W/B had the highest compressive strength, but the lowest ...

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Study of Properties of Sustainable Concrete using Slag

2019-7-1  furnace slag as an alternative for cement and recycled coarse aggregate for natural coarse aggregate. Experimental investigation is carried out with a conventional M30 mix, mixes by replacing with 40 percent, 50 percent and 60 percent of cement with ground granulated blast furnace slag (GGBS). Mix

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Alkali-Activated Slag Concrete with Recycled Aggregate ...

This paper evaluates the long-term mechanical properties (up to 1 year) of alkali-activated slag concrete produced with recycled coarse aggregate (AAS-RA) and natural coarse aggregate (AAS-NA). The AAS-RA achieved a compressive strength of 35.20 MPa at 28 days and improved to 37.52 MPa at 365 days.

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Effect of Recycled Aggregate and Iron Slag in Concrete ...

2020-1-22  recycled. They even pollute the atmosphere and are hard to dispose. In this work, the effect of iron slag and recycled aggregate in the concrete were studied. The compressive strength of the concrete cubes containing Iron slag(20,40,60,80,100%) and recycled aggregate(25,50,75,100%) as partial replacements of fine

Get Price

Effect of slag powder on strength development of alkali ...

The effect slag powder on strength development of alkali-activated recycled cement paste was investigated. The results show that alkali-activated recycled cement paste has low cementing strengths, which depend on the types of the original cement. The alkali-activated recycled cement pastes prepared from the recycled cement pastes with the original cement of fly ash cement (PF) resulted the ...

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How is slag disposed of? – Mvorganizing

2021-1-29  Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a portion of portland cement. Once the slag has been cooled and ground to a usable fineness it is stored and shipped to suppliers throughout the United States.

Get Price

Slag Cement - Lehigh Hanson, Inc.

Slag cement, originally known as granulated blast-furnace slag, begins with the production of iron. The heart of the process is the blast furnace that refines iron ore into iron. The ingredients are heated to nearly 1500 degrees Centigrade to form two components: iron and molten slag. The iron is used to produce steel, and the molten slag is ...

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UG-Mat Blast Furnace Slag Recycled Materials Resource

The primary issue associated with the use of slag cement is the reported loss of durability (salt scaling resistance) for exposed Portland cement concrete containing more than about 25 percent slag cement. It is unknown if any U.S. agencies are conducting

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Influence of Fineness of Recycled Glass Waste and Slag on ...

To minimize the amount of clinker production and associated CO 2 emission, the potential use of recycled ground glass waste (GGW) and electric arc furnace slag (EAFS) as a substitute of cement was evaluated through compressive strength tests on mortars and by calculating their

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The Mechanical Properties of Recycled Coarse Aggregate ...

Using recycled coarse aggregate (RCA) to replace natural pebbles and using lithium slag (LS) from industrial waste to replace cement in order to improve the mechanical properties of concrete and solve environmental problems. In this study, the effects of different substitution rates of RCA (0, 30%, 50%, and 70%) and different LS contents (0, 10#x0025;, 15#x0025;, 20#x0025;, and 25#x0025 ...

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Nucor Steel - Slag Cement Case Study

2021-4-12  The purpose of the tanks was to cool the recycled water during the manufacturing process. The 4000 psi lightweight concrete mixture had a 30% slag cement replacement with 640 lb (290 kg) of total cementitious material, 48% lightweight aggregate, and 52% fine aggregate.

Get Price
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