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aggregate concrete coal

aggregate concrete coal

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 structural concrete, 100% replacement ratio was

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Valorization of calcined coal gangue as coarse

Mechanical properties of coal gangue aggregate concrete. Aggregate has a large proportion in concrete, accounting for about 70%–80% in volume [ 45 ]. The characteristics of aggregate are one of the most important factors affecting the concrete strength [ [46], [47], [48] ].

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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 environmental

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Influence of recycled concrete aggregates and Coal

The mechanical and durability behavior of Recycled concrete aggregates (RCA) based High volume fly ash-Self compacting concrete (HVFA-SCC) has been examined through detailed experimental investigation. The article explores the overall behavior of HVFA-SCC made with 0%, 25%, 50%, 75% and 100% of RCA with alteration of Natural coarse aggregates (NCA) ...

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Use of Coal Waste as Fine Aggregates in Concrete Paving

2013-12-24  The mineral fine aggregates produced from the coal waste have quartz as their major crystalline phase. The presence of kaolin, illite, and gypsum was also detected. The particles are angular in shape, due to the rock frag- mentation procedure. With regard to the presence of sul- fur, the concentration in the fine aggregate was deter- mined as 1.9%. This element is considered harmful for concretes, and most international standards recommend that the amount of sulfates and sulfides in aggregates for concrete production should not exceed the value of 1%. Concerning the materials used in this work, the fine aggregates produced from coal

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New coal ash aggregate helps concrete cure --

2019-10-29  Concrete is made from a mixture of fine powder and coarse rock particles, called aggregates, bonded by a mineral glue called a "cementing matrix," made of cement and water. The aggregates form the...

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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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Effects of the variety and content of coal gangue

2019-9-30  In addition, Li et al. showed that preparing concrete with coal gangue aggregate is practical and that the concrete drying shrinkage performance and freezing resistance performance meet the Chinese engineering specifications. However, most of these studies focused on SAC, few studies have focused on rock gangue aggregate concrete.

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Influence of coal gangue aggregate grading on

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 absorption, cylinder strength and the ...

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Effect of Coal-Contaminated Aggregate on Asphaltic ...

Effect of Coal-Contaminated Aggregate on Asphaltic Concrete Pavement Performance VISHNU A. DIYALJEE Crushed aggregate containing approximately 8 percent by weight of soft coal was used in the construction of asphaltic concrete pavements on 23 km of secondary and primary roadways. Within

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New coal ash aggregate helps concrete cure --

2019-10-29  New coal ash aggregate helps concrete cure Date: October 29, 2019 Source: Drexel University Summary: Researchers have developed a process for turning the solid waste products of coal

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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.

Get Price

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

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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Influence of coal gangue aggregate grading on

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 absorption, cylinder strength and the ...

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Effect of Coal-Contaminated Aggregate on Asphaltic ...

Effect of Coal-Contaminated Aggregate on Asphaltic Concrete Pavement Performance VISHNU A. DIYALJEE Crushed aggregate containing approximately 8 percent by weight of soft coal was used in the construction of asphaltic concrete pavements on 23 km of secondary and primary roadways. Within

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Valorization of calcined coal gangue as coarse aggregate in ...

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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USE OF BOTTOM ASH AS FINE AGGREGATE IN

2021-2-27  AGGREGATE IN CONCRETE: A REVIEW Shambalid Ahady 1*, Sakshi Gupta2 1Post Graduate Student, Department of Civil Engineering, ... coal bottom ash, boiler slag, etc. Raw bottom ash is a granular material that consists of a mixture of inert materials (sand, stone, glass, porcelain, metals, and ash from burnt ...

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Study on Mechanical Properties of PET Fiber-Reinforced ...

2021-1-5  Aggregate concrete mortar has the highest compressive strength [4]; coal gangue is calcined at a temperature of 750°C for 10 minutes, and the 28d compressive strength of coal gangue aggregate concrete is about 39% higher than that ofnatural coal gangue concrete[15]. Whenthe gangue aggre-gate Fuller gradation curve index (n) is 0.62, the ...

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煤矸石集料混凝土抗压强度及耐久性能-Compressive ...

Compressive Strength and Durability of Coal Gangue Aggregate Concrete DOI : 10.11896/j.issn.1005-023X.2018.14.012 中文关键词: 煤矸石 抗压强度 快速氯离子渗透 抗碳化性能 抗硫酸盐侵蚀 粗集料混凝土 英文关键词: coal gangue, compressive strength, rapid ...

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Influence of coal gangue aggregate grading on

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 absorption, cylinder strength and the ...

Get Price

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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Use of Coal Waste as Fine Aggregates in Concrete

2014-6-19  Concrete blocks for paving produced with 25% and 50% of recycled coal waste in substitution of river sand presented satisfactory results in terms of mechanical strength. The use of coal waste as a fine aggregate for concrete block paving manufacture presents technical viability and environmental benefits.

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Performance evaluation of alkali-activated coal-ash ...

2018-2-1  Performance evaluation of alkali-activated coal-ash aggregate in concrete Open PDF. Proceedings of the Institution of Civil Engineers - Waste and Resource Management. ISSN 1747-6526 E-ISSN 1747-6534. Volume 171 Issue 1, February, 2018, pp. 4-13. Prev Next > Performance evaluation of alkali-activated coal-ash aggregate in concrete ...

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Influence of Coal Gangue Aggregate Grading on Strength ...

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 absorption, cylinder strength and the lowest voids. The results indicate that using

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Investigation on Durability of Coal Gangue Aggregate

In order to investigate the durability of coal gangue aggregate concrete,related tests of durability of coal gangue concrete from macroscopic and microscopic are measured in this paper.Results show that,all coal gangue are non-active aggregate.Within a certain range,coal gangue will not significantly reduce the impermeability of concrete.With the increase of coal gangue,mechanical performance ...

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煤矸石集料混凝土抗压强度及耐久性能-Compressive ...

Compressive Strength and Durability of Coal Gangue Aggregate Concrete DOI : 10.11896/j.issn.1005-023X.2018.14.012 中文关键词: 煤矸石 抗压强度 快速氯离子渗透 抗碳化性能 抗硫酸盐侵蚀 粗集料混凝土 英文关键词: coal gangue, compressive strength, rapid ...

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Concrete Mix Design Exposed to Coal - Structural ...

2021-6-2  For all of the concrete at our (low-sulphur, eastern Kentucky bituminous) coal-fired electric generating units we used Type IP cement. This includes outdoor coal handling structures constantly exposed to coal. Typically get satisfactory service for life of the plant (traditionally, 30 to 50 years). For high-sulphur western USA coal, take dik ...

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USE OF BOTTOM ASH AS FINE AGGREGATE IN

2021-2-27  Vol-2 Issue-6 2016 IJARIIE-ISSN(O)-2395-4396 3297 ijariie 203 USE OF BOTTOM ASH AS FINE AGGREGATE IN CONCRETE: A REVIEW Shambalid Ahady 1*, Sakshi Gupta2 1Post Graduate Student, Department of Civil Engineering, Amity School of Engineering Technology, Amity University, Haryana, India

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Strength Properties of High-Strength Concrete

In addition, according to a report about recycling coal bottom ash, approximately 5% and 21% of the CBA were utilized as aggregate in mortar and concrete in the US and EU, respectively. Moreover, CBA was recently used in the mixture of normal vibrating concrete and self-compacting concrete because the sizes of CBA and natural fine aggregate are ...

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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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(PDF) Use of Coal Waste as Fine Aggregates in

Use of Coal Waste as Fine Aggregates in Concrete Blocks for Paving. By Daniel Pagnussat. Fabricated Soil Using Coal Mine Waste. By Jean Carlo Salome dos Santos. Review Management and valorisation of wastes through use in producing alkali-activated cement materials. By João Pedro Bittencourt.

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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.

Get Price

New coal ash aggregate helps concrete cure --

2019-10-29  New coal ash aggregate helps concrete cure Date: October 29, 2019 Source: Drexel University Summary: Researchers have developed a process for turning the solid waste products of coal

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Investigation on Durability of Coal Gangue Aggregate

In order to investigate the durability of coal gangue aggregate concrete,related tests of durability of coal gangue concrete from macroscopic and microscopic are measured in this paper.Results show that,all coal gangue are non-active aggregate.Within a certain range,coal gangue will not significantly reduce the impermeability of concrete.With the increase of coal gangue,mechanical performance ...

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Properties of Concrete Coarse Aggregate Partially

2020-4-10  coal. The aggregate stores of coal in India are evaluated to be 106,260 million tones. As the interest of coal has the most astounding forward linkage impact with warm power, railroads trains, manures industry, concrete, steel, electric force and various different commercial ventures, the

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Performance evaluation of alkali-activated coal-ash ...

2018-2-1  Performance evaluation of alkali-activated coal-ash aggregate in concrete Open PDF. Proceedings of the Institution of Civil Engineers - Waste and Resource Management. ISSN 1747-6526 E-ISSN 1747-6534. Volume 171 Issue 1, February, 2018, pp. 4-13. Prev Next > Performance evaluation of alkali-activated coal-ash aggregate in concrete ...

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Influence of Coal Gangue Aggregate Grading on Strength ...

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 absorption, cylinder strength and the lowest voids. The results indicate that using

Get Price

[PDF] Properties of Concrete Coarse Aggregate

These rejected sullied coals are called as Coal Washery Rejects (CWR). To keep up the ecological manageability, an endeavor has been made in the present study to utilize new material CWR as fractional substitution of coarse aggregate in concrete. The compressive strength of concrete containing CWR at various substitution levels (0% 30%).

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Coal power station waste as a fine aggregate

2020-3-19  COAL POWER STATION WASTE: BOTTOM ASH. Bottom ash is a by-product of the combustion of coal in a coal-powered power plant. Currently there is an abundant amount of bottom ash available in various coal power stations around NSW. There has been research performed on using bottom ash as a fine aggregate

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