Lightweight aerated concrete based on activated powders of coal gangue

However, using an excessive amount of CG affects the compressive strength of LAAM. The incorporation of FA modifies the physical and chemical properties of the coal gangue interface, reduces the width of pores and cracks in the interfacial transition zone, and increases the interfacial bond strength, thereby increasing the …

Preparation and characterization of ZSM-5 molecular sieve using coal

Semantic Scholar extracted view of "Preparation and characterization of ZSM-5 molecular sieve using coal gangue as a raw material via solvent-free method: Adsorption performance tests for heavy metal ions and methylene blue." by Jida Gao et al.

Progress of Coal Gangue Research

Historical experience shows that a large number of coal gangue will be produce in the development of coal process. ... Stewart, B.R., Daniels, W.L.: Physical and chemical properties of coal refuse from southwest ia. Environ. Qual. 21, 635–642 (1992) Article Google Scholar Wang, H., Hao, Q., Yin, E.: A Study on Water Pollution …

Excess sulfur and Fe elements drive changes in soil and

Coal mining is indispensable due to the widespread use of coal, and gangue is the accumulated solid waste byproduct that persists in mined lands, even after the mines have been abandoned 1.In the ...

Study on structural characteristic and mechanical property of coal …

The results indicate: the setting times of cement mixed with kiln dust-activated coal gangue is delayed and the early strength and later strength of cement with 10% kiln dust-activated coal gangue ...

Characterization studies on coal gangue for sustainable …

Characteristics of Coal Gangue and Present Situation and …

Secondly, the soil in coal gangue wasteland usually has many physical and chemical properties, such as poor physical structure, poor water and fertilizer holding capacity, extremely barren or unbalanced nutrient, high heavy metal content, and so on, in particular, high levels of heavy metals will cause long-lasting and almost irreversible ...

The Current Situation Research on Comprehensive Utilization of Coal Gangue

Coal gangue is the largest amount of industrial solid waste in China. It caused serious damage to the ecological environment and waste resources. Therefore, it is of great significance to realize the resource utilization of coal gangue, protecting the environment and realizing the sustainable development of society. This paper …

Influence of coal gangue mulching with various thicknesses …

Overall, to enhance the soil water storage capacity in mining areas, the results suggest that coal gangue mulching with a thickness of 8–16 cm and particle size …

Creep properties of geopolymer cemented coal gangue-fly …

Coal gangue was taken from the gangue mountain of Pingan, west of Fuxin. Fly ash was taken from the Fuxin power plant. The cement was ordinary Portland cement (OPC) #42.5, and the slag was S140 grade superfine slag powder. Table 1 presents their chemical properties, and Fig. 5 shows the particle size distribution of the fly ash. …

Enhanced adsorption properties of polyoxometalates/coal gangue

DOI: 10.1016/j.clay.2022.106730 Corpus ID: 253136157; Enhanced adsorption properties of polyoxometalates/coal gangue composite:The key role of kaolinite-rich coal gangue @article{Zhang2023EnhancedAP, title={Enhanced adsorption properties of polyoxometalates/coal gangue composite:The key role of kaolinite-rich …

Environmental hazards and comprehensive utilization of …

The excessive accumulation of coal gangue leads to significant land resource depletion, resulting in soil erosion, landslides, mudslides, and other geological …

Identification and Activation of Coal Gangue and …

The strength property of limestone calcined gangue cement with 45% replacement of clinker was higher than reference cement (CEM I 42.5 N) on 7 and 28 days. ... 3.1 Mineralogical Composition of Coal Gangue. The chemical composition of coal gangue sample by XRF analysis was shown in Table ...

Representative coal gangue in China: Physical and chemical properties

Download Citation | On Feb 1, 2024, Ding-yi Duan and others published Representative coal gangue in China: Physical and chemical properties, heavy metal coupling mechanism and risk assessment ...

Excess sulfur and Fe elements drive changes in soil and

The results suggested that coal gangue significantly influences soil S, pH and plant species after 8 years of natural recovery.

Preparation of barium alumino-silicate based ceramsite from …

Coal gangue was added as a silicate source of the ceramsite to facilitate celsian formation [37], [38]. The coal gangue was produced by Huainan Dongchen Group in Anhui Province, China. Its chemical composition is also specified in Table 1. Boric anhydride was used to reduce the sintering temperature and improve the neutron …

Underground Disposal of Coal Gangue Backfill in China

China's total coal production in 2021 exceeded 4.13 billion tons, 52% of the world's total. Coal gangue, a solid waste of coal mining accounts for 15–20% of coal production, when directly discharged on the ground surface as waste heaps, it occupies large areas of land and cause environmental pollution. This paper summarizes the …

Reactivity activation of waste coal gangue and its impact …

In the construction field, coal gangue has also been used to make bricks, concrete blocks, mosaics, fired-glazed floor tiles, lightweight aggregate and other low value-added building materials [8], [16], [17].At present, coal gangue can partly or completely replace clay for aluminum adjustment in cement clinker production [18], [19]. In fact, the …

Effect of mechanical grinding on physical and chemical …

DOI: 10.1016/J.CONBUILDMAT.2015.10.144 Corpus ID: 138150330; Effect of mechanical grinding on physical and chemical characteristics of circulating fluidized bed fly ash from coal gangue power plant

Mechanical properties and micro characterization of coal …

DOI: 10.1016/j.conbuildmat.2023.133747 Corpus ID: 264085396; Mechanical properties and micro characterization of coal slime water-based cementitious material-gangue filling: A novel method for co-treatment of mining waste

Effect of raw coal gangue coarse aggregates on mechanical properties …

Abstract Raw coal gangue (RCG) as one of the solid wastes can result in serious ecological and environmental pollution. ... Effect of raw coal gangue coarse aggregates on mechanical properties and compressive stress–strain response of concrete. Xuting Kou, Xuting Kou [email protected] College of Civil Engineering, Taiyuan …

Mobility behavior and environmental implications of trace …

The potential environmental hazards posed by trace elements have assumed serious proportions due to their toxicity, bioavailability and geochemical behavior. The toxicity and mobility of trace elements in coal gangue is dependent on the elements' chemical properties, therefore, the quantification of …

Effect of Coal Gangue Grading Characteristics on cemented …

The properties of the coal gangue were characterised in terms of porosity and friction angle, and the comprehensive influence of different coal gangue grading, volume fraction and CPB mixture ratios on the rheological properties of the CPB was investigated. ... The cement's chemical composition underwent analysis using an X-ray …

Trace Elements in Coal Gangue: A Review | IntechOpen

The leaching characteristics of trace elements in fresh, weathering, and filling coal gangue are different. During coal gangue combustion, the trace elements …

Preparation of coal gangue ceramsite high-strength …

Coal gangue (CG) is a type of industrial solid waste produced by the process of coal excavation and separation 1,2,3.Generally, one ton of CG is discarded for every 10 tons of produced coal 4,5. ...

Characterization of coal gangue and coal gangue …

Physical and chemical characteristics of coal gangue and sodalite. Figure 1a shows the XRD patterns of coal gangue and hydrothermally synthesized sodalite. It shows that the coal gangue …

Activation Mechanism of Coal Gangue and Its Impact on the Properties …

Coal gangue is one of the industrial solid wastes that may harm the human body through the ecosystem for a long time. Using coal gangue in geopolymer preparation can effectively reduce cement output and meet the sustainability requirements. In this paper, the physical and chemical characteristics, including the heavy metal content, of …

Influence of coal gangue aided phytostabilization on metal …

Coal gangue was sampled from a coal waste dump in Huainan coalfield (Anhui, China) (32°49′07.0″N, 116°34′23.5″E). The coal gangue and tailings were air dried, sieved through a 2 mm mesh sieve and homogenized before use. The physico-chemical properties of the coal gangue and tailings are presented in Table 1.

Influence of coal gangue mulching with various thicknesses …

The effects of coal gangue and fly ash on the hydraulic properties and water content distribution in reconstructed soil profiles of coal-mined land with a high groundwater table. Hydrol. Process ...

Comprehensive utilization and environmental risks of coal …

The amount of coal gangue, a by-product of coal mining and washing, is rapidly increasing with the growing trend of energy consumption. The accumulated coal …

Trace Elements in Coal Gangue: A Review | IntechOpen

Coal gangue is one of the largest industrial residues. It has high ash content, low carbonaceous content, and heating value. Meanwhile, it has some trace elements. Large quantities of coal gangue cause serious environmental problems by polluting the air, water, and soil as well as occupying a tremendous amount of land. …

Triaxial mechanical properties and microscopic …

Coal gangue is a solid waste produced in the process of coal mining and coal washing. The cumulative storage of coal gangue in China has reached 7 billion tons, which is approximately 6.79 % of the national arable land. The significant number of accumulations not only waste land resources but also adds to the ecological burden.

Physical and chemical properties and distribution characteristics

The substrate made of coal gangue has more inferior physical-chemical properties. Considering the indicators, the conclusion is that several indicators of B test plot are better than the others, so a soil depth of 70-80 cm is a more economical and rational top-soil depth for reclaimed land when using coal gangue as a filler.

Evaluation of Mechanical Properties and Microscopic Structure of Coal

Mechanical property parameters of coal gangue treated by solutions were investigated. The action microstructure of coal gangue was revealed through a series of X-ray diffraction (XRD), X-ray fluorescence spectrometry (XRF), scanning electron microscopy (SEM), and energy dispersive spectrometry (EDS). ... was produced by chemical …

Investigation of combustion characteristics and kinetics of coal gangue …

Chemical properties and combustion behavior of constituent relative density fraction of a thermal coal. ... ABSTRACT To determine the effect of water contents on the oxidation spontaneous combustion of coal gangue, the properties and combustion characteristics of coal gangue were studied using industrial … Expand. 3. 1 Excerpt;

The Sustainable Utilization of Coal Gangue in Geotechnical …

Abstract Among coal mining-related wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining. A thorough understanding of environmental concerns associated with the current model of ...