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
احصل على السعر
Application of Coal Gangue as a Coarse Aggregate in
2021-11-11 Along with the excavation and washing of coal in the production process, large amounts of rock-like coal gangue (CG) accompanying the carboniferous beds are discharged
احصل على السعر
Valorization of calcined coal gangue as coarse aggregate
2021-8-1 CG used in this paper was obtained in Huaibei mining area, Anhui Province, China. NA was selected as an experimental comparison. The particle sizes of both raw coal gangue
احصل على السعر
Use of Coal Waste as Fine Aggregates in
2013-1-1 The test results indicate that 5% volume replacement of natural aggregates with untreated coal waste improves the average compressive
احصل على السعر
New coal ash aggregate helps concrete cure -- ScienceDaily
2019-10-29 Potential use of lightweight aggregate (LWA) produced from bottom coal ash for internal curing of concrete systems. Cement and Concrete Composites,2020; 105: 103428
احصل على السعر
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
احصل على السعر
Using Chinese Coal Gangue as an Ecological Aggregate
2022-6-26 Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the
احصل على السعر
The influence of coal gangue coarse aggregate on the
1 天前 Compared with NAC, CGCA has a higher water absorption rate. To avoid CGCA adsorbing mixing water, additional water has been added according to the water absorption
احصل على السعر
Using Chinese Coal Gangue as an Ecological Aggregate
Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the green sustainable
احصل على السعر
THE USE OF CORAL AS AN AGGREGATE FOR PORTLAND
2021-7-14 aggregate for concrete in vertical construction. The only significant type ot deteriora-tion observed in coral concrete structures was the cracking and spalling of concrete
احصل على السعر
Using Chinese Coal Gangue as an Ecological Aggregate
2022-6-26 Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the green sustainable development requirements. This paper reviews the properties and preparation methods of Chinese gangue aggregate, studi
احصل على السعر
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
احصل على السعر
Ashes to Concrete Drexel University
2019-10-28 October 28, 2019. 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.
احصل على السعر
(PDF) Using Chinese Coal Gangue as an Ecological
2022-6-26 Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the green sustainable development
احصل على السعر
Using Chinese Coal Gangue as an Ecological Aggregate
2022-6-26 Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the green sustainable development requirements. This paper reviews the properties and preparation methods of Chinese gangue aggregate, studies the influence of gangue aggregate on
احصل على السعر
The influence of coal gangue coarse aggregate on the
1 天前 The coal gangue used in this experiment is discharged from a coal mine in Shaanxi Province, China, and its radioactivity meets the specification requirements, with a calorific value of 664.75 kJ/kg and a carbon content of 1.28%.According to "Code for design of environmental protection in coal industry"(GB 50821-2012), coal gangue with calorific value <2090 kJ/kg and
احصل على السعر
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
احصل على السعر
Utilization of coal gangue as coarse aggregates in
2020-10-10 137. 作者：. S Gao ， L Guo. 摘要：. 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.
احصل على السعر
Influence of coal gangue aggregate grading on strength
2015-1-10 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 coal gangue as coarse and fine aggregate in concrete is technically feasible and useful. When n is 0.62, the values of the slump, 28-day compressive, splitting tensile strength, flexural
احصل على السعر
Replacement of River Sand with Coal Bottom Ash as Fine
2021-10-26 The coarse nature of coal bottom ash particles can be harnessed and explored. The present study focuses on utilization of coal bottom ash as fine aggregate in cement mortars. River sand is fully and partially replaced by coal bottom ash. Five different proportions of river sand being replaced with coal bottom ash are adopted, namely 0, 25, 50
احصل على السعر
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
احصل على السعر
Use of Coal Waste as Fine Aggregates in
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
احصل على السعر
Using Chinese Coal Gangue as an Ecological Aggregate
2022-6-26 Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the green sustainable development requirements. This paper reviews the properties and preparation methods of Chinese gangue aggregate, studi
احصل على السعر
Coal power station waste as a fine aggregate
2020-3-19 BBA, MTP and WNG were selected as partial fine aggregate replacements (by weight of the total fine aggregate content) at 20 per cent, 30 per cent, 40 per cent and 50 per cent. A field trial was also performed to assess
احصل على السعر
Ashes to Concrete Drexel University
2019-10-28 October 28, 2019. 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.
احصل على السعر
(PDF) Using Chinese Coal Gangue as an Ecological
2022-6-26 Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the green sustainable development
احصل على السعر
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
احصل على السعر
The influence of coal gangue coarse aggregate on the
1 天前 The coal gangue used in this experiment is discharged from a coal mine in Shaanxi Province, China, and its radioactivity meets the specification requirements, with a calorific value of 664.75 kJ/kg and a carbon content of 1.28%.According to "Code for design of environmental protection in coal industry"(GB 50821-2012), coal gangue with calorific value <2090 kJ/kg and
احصل على السعر
The Potential Use of Waste Rock from Coal Mining for the
2020-10-26 The effect of aggregate on elastic modulus was also studied using the testing equipment shown in Fig. 8 to evaluate the possibility of using aggregate from coal mining waste in producing concrete. The experimental results of the influence of aggregates on elastic modulus (E) at the ages of 7 and 28 days are given in Table 7 and shown in Fig. 9 .
احصل على السعر
Waste Coal Ash found to be Excellent Raw
2019-11-7 Finding suitable ingredients to make high-quality concrete is about to become a lot easier, as researchers have found that waste coal ash makes an ideal raw material.. With concrete remaining the ‘go to’ material for
احصل على السعر