coal as concrete aggregate

(PDF) Use of Coal Waste as Fine Aggregates in Concrete ...

Acid generation prediction results of the raw wast e, coal waste fine aggregate and the concrete paving blocks with . 0%, 25%, and 50% of substitution of river

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Use of coal waste as fine aggregates on concrete blocks ...

2013-5-8  production of concrete blocks for paving using coal mine waste as fine aggregate. Concrete blocks were produced with coal waste replacing sand in 0%, 25%, 50%, 75%, and 100%. The compressive strength was evaluated in the concrete blocks at 7, 28, and 90 days. Static tests by acid-base accounting methods were carried out to evaluate the ...

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Use of Coal Waste as Fine Aggregates in Concrete

2013-12-24  The concrete paving blocks were produced in a ver- tical shaft concrete mixer. The reference trace used 5.36 kg of cement, 6.26 kg of coarse basaltic aggregate, 14.18 kg of river sand aggregate, and a water/cement ratio of 0.39. The coal waste was used as a substitute for river sand aggregate, considering the following volumetric

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Use of Coal Waste as Fine Aggregates in Concrete Paving

The aim of this work was to study the use of coal waste to produce concrete paving blocks. The methodology considered the following steps: sampling of a coal mining waste; gravity separation of the fraction with specific gravity between 2.4 and 2.8; comminution of the material and particle size analysis; technological characterization of the material and the production of concrete

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Utilization of coal gangue as coarse aggregates in ...

2021-1-25  In this paper, coal gangue is utilized as a replacement of coarse aggregate in structural concrete. The effects of coal gangue on the mechanical properties of concrete material, circular reinforced concrete column and concrete-filled steel tubular column are experimentally studied and discussed in detail.

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New coal ash aggregate helps concrete cure -- ScienceDaily

2019-10-29  New coal ash aggregate helps concrete cure. Researchers have developed a process for turning the solid waste products of coal power plants into a useful ingredient that could improve properties of ...

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Application of Coal Gangue as a Coarse Aggregate in

2021-11-11  Among the techniques for converting stacked coal gangue to reusable material, one of the most effective ways is to use coal gangue as a coarse aggregate in green concrete productions. The physical and chemical properties of rock and spontaneous-combustion coal gangue are generally suitable for being used as a coarse aggregate in green concrete.

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(PDF) Coal ash use as a cement replacement in concrete ...

2020-5-19  In this study, coal ash waste was used as a Portland cement replacement by 10% and 20% for the production concrete mix concrete mix with 28-day design strength of 45 N/mm ² .

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Valorization of calcined coal gangue as coarse aggregate ...

2021-8-1  However, compared to natural aggregate, the strength of coal gangue aggregate (CGA) is much lower, and its interfacial bonding in concrete is weaker. This paper studies the effect of calcination processes at 450 °C and 750 °C on the mineral and chemical compositions, microstructure and suitability of coal gangue as aggregate in concrete ...

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Aggregates for Concrete - Memphis

2021-8-9  amount of air, water, cement, and fine aggregate (that is, the mortar fraction) should be about 50% to 65% by absolute volume (45% to 60% by mass). Rounded aggre-gate, such as gravel, requires slightly lower values, while crushed aggregate requires slightly higher values. Fine aggregate content is usually 35% to 45% by mass or

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Use of Coal Waste as Fine Aggregates in Concrete

2013-12-24  The concrete paving blocks were produced in a ver- tical shaft concrete mixer. The reference trace used 5.36 kg of cement, 6.26 kg of coarse basaltic aggregate, 14.18 kg of river sand aggregate, and a water/cement ratio of 0.39. The coal waste was used as a substitute for river sand aggregate, considering the following volumetric

More

Use of coal waste as fine aggregates on concrete blocks ...

2013-5-8  production of concrete blocks for paving using coal mine waste as fine aggregate. Concrete blocks were produced with coal waste replacing sand in 0%, 25%, 50%, 75%, and 100%. The compressive strength was evaluated in the concrete blocks at 7, 28, and 90 days. Static tests by acid-base accounting methods were carried out to evaluate the ...

More

Use of Coal Waste as Fine Aggregates in Concrete Paving

2014-6-19  The concrete paving blocks were produced in a vertical shaft concrete mixer. The reference trace used 5.36 kg of cement, 6.26 kg of coarse basaltic aggregate, 14.18 kg of river sand aggregate, and a water/cement ratio of 0.39.

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New coal ash aggregate helps concrete cure -- ScienceDaily

2019-10-29  New coal ash aggregate helps concrete cure. Researchers have developed a process for turning the solid waste products of coal power plants into a useful ingredient that could improve properties of ...

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Multitechnique investigation of concrete with coal gangue ...

2021-7-6  The compressive strength, fluidity, and compactness of concrete were studied to explore the macro performance of coal gangue concrete (CGC). Meanwhile, mercury intrusion porosimeter (MIP), scanning electron microscope (SEM), and nanoindentation were used to comprehensively analyze the pore structure, morphology, and micromechanical properties of

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Experimental Study on Dynamic Mechanical Properties of ...

Using wasted coal gangue as concrete aggregate can reduce the environmental pollution caused by coal gangue stacking and protect the environment; further, it can reduce the demand for natural sand and rocks, as well as saving resources, which is an effective way to turn waste into high-value materials. Therefore, this research proposes having ...

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Aggregates for Use In Concrete

2016-3-1  Concrete subject to abrasion 3.0* All other concrete 5.0* Coal and lignite: Where surface appearance of concrete is of importance 0.5 All other concrete 1.0 Source: Table 1 Limits for Deleterious Substances in Fine Aggregate for Concrete, ASTM C 33.

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Aggregates for Concrete - Memphis

2021-8-9  amount of air, water, cement, and fine aggregate (that is, the mortar fraction) should be about 50% to 65% by absolute volume (45% to 60% by mass). Rounded aggre-gate, such as gravel, requires slightly lower values, while crushed aggregate requires slightly higher values. Fine aggregate content is usually 35% to 45% by mass or

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USE OF BOTTOM ASH AS FINE AGGREGATE IN

2021-2-27  Concrete is a complex mix of diversified materials consisting of cement, fine aggregate (FA), coarse aggregate (CA) and water (admixtures, if any) which has emerged as a preeminent construction material for the infrastructural and building needs. Concrete is the most widely used building material in the world and is a

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Aggregates for Concrete as per American Standards -

Fig 1: Aggregates used in production of concrete. The aggregates are broadly classified into two types based on the size, namely- fine aggregate and coarse aggregate. In this article, we discuss the properties of the standard aggregates

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Use of coal waste as fine aggregates on concrete blocks ...

2013-5-8  production of concrete blocks for paving using coal mine waste as fine aggregate. Concrete blocks were produced with coal waste replacing sand in 0%, 25%, 50%, 75%, and 100%. The compressive strength was evaluated in the concrete blocks at 7, 28, and 90 days. Static tests by acid-base accounting methods were carried out to evaluate the ...

More

Use of Coal Waste as Fine Aggregates in Concrete Paving

2014-6-19  The concrete paving blocks were produced in a vertical shaft concrete mixer. The reference trace used 5.36 kg of cement, 6.26 kg of coarse basaltic aggregate, 14.18 kg of river sand aggregate, and a water/cement ratio of 0.39.

More

Ashes to Concrete Now Drexel University

2019-10-28  Ashes to Concrete. Drexel researchers are recycling coal ash, a waste product from coal power plants, to make a porous, lightweight aggregate that can be used as a concrete additive to aid the hardening process. Coal ash is the less notorious byproduct of coal-fired power plants. It’s the residual solid waste that comes from burning coal.

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Research Progress on Coal Gangue Aggregate for

Abstract: Coal gangue(CG) is one of the largest industrial solid wastes in China. The utilization of coal gangue as concrete aggregate can not only solve environmental pollution,but also make up for the shortage of natural sand and stone resources. This way is ...

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Aggregates for Use In Concrete

2016-3-1  Concrete subject to abrasion 3.0* All other concrete 5.0* Coal and lignite: Where surface appearance of concrete is of importance 0.5 All other concrete 1.0 Source: Table 1 Limits for Deleterious Substances in Fine Aggregate for Concrete, ASTM C 33.

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Frost Resistance of Coal Gangue Aggregate Concrete ...

2020-5-6  Coal gangue, a by-product produced during the process of coal mining and washing, has a serious impact on the environment. Using coal gangue as a concrete aggregate has been proven helpful in potentially improving its value and reducing its ...

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Using Coal Ash in Highway Construction: A Guide to ...

Bottom ash can be used as aggregate in concrete and in cold mixed asphalt, and as a structural fill for embankments and cement stabilized bases for highway construction. Figure 5 presents details on coal combustion product use for the 2003 year, with highway applications shaded.

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Uses of Bottom ash in the Replacement of fine

2014-11-17  fine aggregate. Keyword: Bottom ash, Cement, Coarse aggregate, concrete, sands, strengths. 1. Introduction 1 India produces approximately more than 100 million tonnes of Coal ash annually. Coal-based thermal power plants all over the world facing serious problems of handling and disposal of the ash produced.The utilization

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Aggregates for Concrete - Memphis

2021-8-9  amount of air, water, cement, and fine aggregate (that is, the mortar fraction) should be about 50% to 65% by absolute volume (45% to 60% by mass). Rounded aggre-gate, such as gravel, requires slightly lower values, while crushed aggregate requires slightly higher values. Fine aggregate content is usually 35% to 45% by mass or

More

Aggregates for Concrete as per American Standards -

Fig 1: Aggregates used in production of concrete. The aggregates are broadly classified into two types based on the size, namely- fine aggregate and coarse aggregate. In this article, we discuss the properties of the standard aggregates

More

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