coal gangue coarse


Utilization of coal gangue as coarse aggregates in ...

Jan 25, 2021· The coal gangue was crushed and sieved according to GB/T 14685-2011 for the preparation of ordinary concrete. The particle size of the sieved coal gangue coarse aggregates was in the range of 5 mm–35 mm. The basic physical properties of natural gravel and coal gangue were tested as listed in Table 1

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Influence of coarse coal gangue aggregates on elastic ...

Request PDF | Influence of coarse coal gangue aggregates on elastic modulus and drying shrinkage behaviour of concrete | The elastic modulus and drying shrinkage are the …

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Crystals | Free Full-Text | An Experimental Study of the ...

The research into the road performance of coal gangue is of great significance for the consumption of coal gangue and reducing pollution. In this paper, the coal gangues were prepared by separation and crushing processes, and their gradations were also optimized. Aiming to identify the possible problems of coal gangue as a pavement base, an unconfined compressive strength test, a splitting ...

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Effects of the variety and content of coal gangue coarse ...

DOI: 10.1016/J.CONBUILDMAT.2019.05.176 Corpus ID: 197636927. Effects of the variety and content of coal gangue coarse aggregate on the mechanical properties of concrete @article{Zhou2019EffectsOT, title={Effects of the variety and content of coal gangue coarse aggregate on the mechanical properties of concrete}, author={Mei-Li Zhou and Yanwei Dou and Yuzhuo Zhang and Yuanqiang Zhang and …

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Effect of Physical and Chemical Properties of Coal Gangue ...

Apr 30, 2020· Apr 30, 2020· The coal gangue with more SiO 2 content is more suitable to produce concrete aggregate. With the increase of replacement ratio of coal gangue coarse aggregate, the compressive strength of CGC decreases obviously, while the effect of fine aggregate replacement on compressive strength is not overt.

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Influence of coarse coal gangue aggregates on elastic ...

Request PDF | Influence of coarse coal gangue aggregates on elastic modulus and drying shrinkage behaviour of concrete | The elastic modulus and drying shrinkage are the fundamental mechanical ...

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Valorization of calcined coal gangue as coarse aggregate ...

The substitution of calcined coarse coal gangue can result in a more dense concrete structure compared to uncalcined coarse coal gangue, and nonetheless holds slight advantage due to …

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Micro‐pore structure characteristics and macro‐mechanical ...

Gaode spontaneous combustion coal gangue can be used as light coarse aggregate to prepare concrete provided it is sorted scientifically and it can be used to prepare PP fibre spontaneous combustion coal gangue concrete with compressive strength of 49.2 MPa, splitting tensile strength of 3.21 MPa, and bending ...

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Study on Filling Material Ratio and Filling Effect: Taking ...

Jun 02, 2019· Filling mining is an effective way to settle the dilemma of "Three Down and One Above" in coal mining. Fly ash and coal gangue can be used as filling materials with significant social, economic, and environmental benefits. Using coarse fly ash base as cementing material and coal gangue as aggregate, orthogonal experiment of filling paste was conducted in this study.

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Effects of the variety and content of coal gangue coarse ...

Sep 30, 2019· The two types of coal gangue coarse aggregates used in this study have different grain shapes, densities and crushing values because of the differences in the formation process, production process or porosity. Although there are considerable differences between the properties of S and R, and they are obviously different from those of N. ...

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coal gangue were obtained. On this basis, the coal gangue is used as coarse aggregate instead of some natural stones, and further study the influence of different temperatures on the compressive properties of coal gangue concrete, providing a basis for the resource utilization of pingxiang coal gangue. 2. Test Section 2.1.The raw material

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Study on Filling Material Ratio and Filling Effect: Taking ...

coarse fly ash-based cementitious material to coal gangue>the mass concentration of paste filling material>the ratio of coal gangue less than 5mm. Since the …

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Properties of steel fiber reinforced coal gangue coarse ...

May 06, 2014· In this paper, workability, strength and durability of coal gangue coarse aggregate concrete with different steel fiber content levels have been studied. The results indicate that the concrete compressive strength, flexural strength and tensile splitting strength at the age of 28 days increase with the steel fiber content increasing, while cost and impermeability reduce with steel fiber ...

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Valorization of calcined coal gangue as coarse aggregate ...

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 environmental issue of accumulation but also reducing the mining of natural aggregate. However, compared to natural aggregate, the strength of coal gangue aggregate (CGA) is much lower, and its ...

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Alkali-Activated Coal Gangue-Slag Concrete

coal gangue (calcined and uncalcined) coarse aggregate replacing the gravel was 0%, 30%, 50%, 70%, and . The water and salt freeze-thaw resistance, compressive strength, chloride permeation, microstructure, performance mechanism, inner freeze-thaw damage distribution, and mechanics

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