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

Coal waste has previously been utilized as coarse and fine aggregates in concrete with fibers (Karimipour et al. 2020) and without fibers (Karimaei et al. 2020), as

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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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The Potential Use of Waste Rock from Coal Mining for the ...

2020-10-26 · They met requirements in producing mortar and concrete. Another finding in this study is the waste rock with compressive strength of over 100 MPa was suitable for coarse aggregate for producing concrete. Finally, when using recycled aggregate from waste rocks of coal mining, it is possible to make concrete with compressive strength of over 30 MPa.

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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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Influence of coarse coal gangue aggregates on elastic ...

The concrete in this study had a high subsurface drainage modulus, making it feasible for application in coal mining subsidence areas with high groundwater levels. Moreover, partial replacement of ordinary Portland cement by fly ash and coarse aggregate by coal gangue can alleviate environmental problems.

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Utilization of coal gangue as coarse aggregates in ...

2021-1-25 · In most of the studies on coal gangue concrete from the aspect of material, 50% coarse aggregate replacement ratio was commonly used as the maximum replacement ratio whilst 100% coarse aggregate replacement ratio was also investigated by some researchers .Since the aim of this study is to maximize the application efficiency of coal gangue in

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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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Aggregates for Concrete - Memphis

2021-8-9 · coarse aggregate. There are several reasons for specifying grading limits and nominal maximum aggregate size; they affect relative. 82. Design and Control of Concrete Mixtures EB001. Fig. 5-4. Range of particle sizes found in aggregate for use in concrete. (8985) Fig. 5-5. Making a sieve analysis test of coarse aggregate in a laboratory. (30175 ...

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Use of coal ash as geopolymer binder and coarse

2015-10-15 · Highlights. Waste from coal ash was used to produce pervious geopolymer concrete (PGC). Fly ash was used as geopolymer binder and bottom ash as coarse aggregate. NaOH concentration, level OPC replacement, and curing temperature were varied. The obtained PGCs are suited for use as an environment friendly concrete.

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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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Valorization of calcined coal gangue as coarse aggregate ...

2022-1-3 · Coal gangue is a by-product generated from coal mining and washing. Using coal gangue as aggregate is an effective approach of valorization this high-volume industrial waste, not only solving the ...

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Aggregates for Concrete - Memphis

2021-8-9 · coarse aggregate. There are several reasons for specifying grading limits and nominal maximum aggregate size; they affect relative. 82. Design and Control of Concrete Mixtures EB001. Fig. 5-4. Range of particle sizes found in aggregate for use in concrete. (8985) Fig. 5-5. Making a sieve analysis test of coarse aggregate in a laboratory. (30175 ...

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Use of Coal Waste as Fine Aggregates in Concrete

used to replace conventional sand as a fine aggregate for concrete paving blocks. This practice can collaborate in a ... the run-of-mine coal (ROM) is gravimetri- ... 6.26 kg of coarse basaltic ...

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The Effect of the Morphology of Coarse Aggregate on the ...

The morphology of the coarse aggregate also has an impact on the rheological parameters of a fresh concrete mixture. To better understand this phenomenon, the hypothesized mechanism of the formation of SCHPFRC caused by different morphology of coarse aggregate was proposed at the end of the article.

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Enhancing the use of coal-fly ash in coarse aggregates ...

2020-1-1 · The experimental work has been made to estimate the operation of coal-fly ash as acceptable and coarse aggregates concrete with the ordinary Portland cement of 53 grade. Initially, the chemical and physical characteristics of coal-fly ash particles, such as chemical compositions, detailed significance and XRD, SEM images have been studied.

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

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Effect of coal combustion fly ash use in concrete on the ...

Of the 11 constituents tested, only Sb, Ba, B, Cr and V were measured in quantifiable amounts. Microconcretes without coarse aggregate were determined to be conservative surrogates for concrete in leaching assessment since cumulative release from microconcretes were only slightly greater than the associated concrete materials.

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Micro‐pore structure characteristics and

2021-1-15 · concrete. They proved that if the coal gangue in Fuxin Gaode Mine was scientifically sorted out and used as coarse aggregate, PP fibre could be ‘combined’ to prepare concrete with excellent performance. Hongjiang et al. [9] designed ten groups of PP fibre spontaneous combustion coal gangue concrete specimens by

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Use of Recycled Aggregates in Construction

2021-12-11 · Recycled Concrete Aggregate (RCA) Crushed sound and clean waste concrete of at least 95% by weight of concrete with typical total contamination lower than 1% of the bulk mass. Class 1A RCA is a well graded RCA with no more than 0.5% brick content. Partial replacement (30%) for natural aggregate in concrete for sidewalks, kerbs and gutters. Also

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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.

Read More
Use of Coal Waste as Fine Aggregates in Concrete

used to replace conventional sand as a fine aggregate for concrete paving blocks. This practice can collaborate in a ... the run-of-mine coal (ROM) is gravimetri- ... 6.26 kg of coarse basaltic ...

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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 gangue aggregate grading on strength ...

2015-1-10 · This paper investigates the feasibility of using coal gangue as coarse and fine aggregates in concrete as well as how the coal gangue aggregate grading affects concrete properties. Nine mixed concrete samples were prepared with the value n in Fuller’s curve ranged from 0.44 to 0.68. The coal gangue aggregate with n = 0.62 shows the highest density, water

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The Effect of the Morphology of Coarse Aggregate on the ...

The morphology of the coarse aggregate also has an impact on the rheological parameters of a fresh concrete mixture. To better understand this phenomenon, the hypothesized mechanism of the formation of SCHPFRC caused by different morphology of coarse aggregate was proposed at the end of the article.

Read More
Effect of coal combustion fly ash use in concrete on the ...

Of the 11 constituents tested, only Sb, Ba, B, Cr and V were measured in quantifiable amounts. Microconcretes without coarse aggregate were determined to be conservative surrogates for concrete in leaching assessment since cumulative release from microconcretes were only slightly greater than the associated concrete materials.

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

Read More
Use of Recycled Aggregates in Construction

2021-12-11 · Recycled Concrete Aggregate (RCA) Crushed sound and clean waste concrete of at least 95% by weight of concrete with typical total contamination lower than 1% of the bulk mass. Class 1A RCA is a well graded RCA with no more than 0.5% brick content. Partial replacement (30%) for natural aggregate in concrete for sidewalks, kerbs and gutters. Also

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Study on Strength and Durability of Concrete Containing ...

This paper presents the results of experimental study on the effects of adhered mortar content on strengths and durability of concrete. Compressive, tensile and shear strengths, modulus of elasticity, drying shrinkage and carbonation were tested on concrete mixtures with the water cement ratio of 0.43, 0.50 and 0.60 using 3 kinds recycled coarse aggregate and a riversand.

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McLanahan UltraWASH Plants | Aggregates and Mining

They strive to deliver quality products on the concrete side of their business, which starts with the material used to make those products. Tri-Parish Sand and Gravel is a dry mining operation located in Louisiana, USA. They produce C-33 concrete sand, pea gravel and #57 concrete gravel for use in their ready mix operation, Parish Ready Mix.

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