coal as concrete aggregate

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

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. The coal waste was used as a substitute for river sand aggregate, considering the following volumetric levels of ...

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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

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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 paving blocks.

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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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Utilization of coal gangue as coarse aggregates in ...

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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(PDF) 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

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(PDF) Recycling of Coal Ash in Concrete as a Partial ...

2019-5-21  Concrete construction offers a great opportunity to replace the cement with a coal-based power plant waste—known as coal bottom ash (CBA)—which offers great environmental and

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A Review: The Effect of Grinded Coal Bottom Ash on

The test involved designation of 0%, 10%, 20% and 30% of coal bottom ash (CBA) as a partial replacement of fine aggregate with variation of water cement ratio of 0.35, 0.40 and 0.45.

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Valorization of calcined coal gangue as coarse aggregate ...

2021-10-15  In this paper, AACGS concrete was prepared by using raw and 700 °C calcined coal gangue as the coarse aggregate and alkali-activated coal

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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 coal gangue as aggregate.

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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

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 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. The coal waste was used as a substitute for river sand aggregate, considering the following volumetric levels of ...

More

Utilization of coal gangue as coarse aggregates in ...

Abstract 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. The mechanical behavior of coal gangue concrete is reduced by increasing the ...

More

(PDF) 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

More

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.

More

A Review: The Effect of Grinded Coal Bottom Ash on

The test involved designation of 0%, 10%, 20% and 30% of coal bottom ash (CBA) as a partial replacement of fine aggregate with variation of water cement ratio of 0.35, 0.40 and 0.45.

More

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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Using Recycled Concrete Aggregate Specify Concrete

2019-2-28  Recycled concrete aggregate presents numerous benefits: Increased protection from seepage. Reduced costs, since it doesn’t need to be mined. Reduced environmental impact, more appealing to governments and customers. Preserves natural resources such as gravel, water, coal, and oil. Reduced space wastage in landfills.

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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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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

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

Utilization of coal gangue as coarse aggregates in ...

Abstract 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. The mechanical behavior of coal gangue concrete is reduced by increasing the ...

More

Frost Resistance of Coal Gangue Aggregate Concrete ...

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 environmental impact to a certain extent. However, the high water absorption and low strength of coal gangue aggregate cause a poor frost resistance of ...

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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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STRENGTH PERFORMANCE OF CONCRETE USING

2015-1-27  aggregate in the production of concrete. The previous studies in which coal bottom ash has been targeted as a substitute for sand in production of concrete demonstrate that the strength development pattern of coal bottom ash concrete is similar to that of conventional concrete.

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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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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

Using Recycled Concrete Aggregate Specify Concrete

2019-2-28  Recycled concrete aggregate presents numerous benefits: Increased protection from seepage. Reduced costs, since it doesn’t need to be mined. Reduced environmental impact, more appealing to governments and customers. Preserves natural resources such as gravel, water, coal, and oil. Reduced space wastage in landfills.

More

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

More

Valorization of calcined coal gangue as coarse aggregate

2021-4-29  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 manufacturing.

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Influence of coal bottom ash as fine aggregates ...

Coal bottom ash has a potential to be used as concrete material in place of fine aggregates. The present investigation has focused on reviewing some of the fresh, mechanical and durability properties of Normally Vibrated Concrete (NVC) and Self-Compacting Concrete (SCC) made with incorporation of CBA as replacement of fine aggregates.

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