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This Collection will cover the research happening around the use of fly ash in concrete, asphalt and other building materials, highlighting its environmental benefits and performance characteristics.
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Introduction. Although there is a rapid emergence of various new energy sources, including nuclear energy, wind energy, and solar energy, fossil fuel are still the major energy source to account for 80% of the world's energy supply (Ju et al. 2021).As a type of fossil fuels, coal has always been playing an important role in energy supply throughout human history, to …
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This review presents different ways of using fly ash and policies of Govt of India regarding utilization and disposal of fly ash. Environmental and occupational health hazards associated …
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To realize sustainable development and beneficial use of fly ash in the construction industry, this paper presents a comprehensive review of relevant literature to evaluate the properties and performance of fly ash, with a particular focus on recent advances in characterization, compositional understanding, hydration mechanism, activation ...
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Fly ash (FA) or pulverized fuel ash, formed during the combustion of coal and earlier recognized as an industrial waste, has become an important industrial by-product. ... governing legal policies, and the threat level to the environment. India, which initiated its FA Mission in 1994 [5], has reached a point where FA may become a limited ...
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Issues with fly ash management. The government mandates that all coal power plants (CPPs) reach utilization of fly ash. Along with it, CPPs should give a certain …
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played a crucial role in the uptake of the technology through technology demonstration, easy access to fly ash and mandatory use of fly ash bricks in construction. Initiatives by the state government include incentives for fly ash units under their industrial policies and preferential procurement of fly ash bricks for public construction.
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A strong and holistic policy by the Union government can encourage fly ash-based industries, expand applications and completely eliminate dumping of ash thus helping in combating carbon emissions ...
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The use of fly ash in the production of PUR materials. Annual production and utilization of CCPs in 2019; based on [27]. Chemical composition of FA in selected countries.
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Fly ash produced during coal combustion is one of the major sources of air and water pollution, but the data on the impact of micrometer-size fly ash particles on human cells is still incomplete.
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Fly ash is a hazardous material that is produced from municipal solid waste incineration. It contains heavy metals and should be properly treated to meet landfill entry requirements. In this study, under the precondition that the leachable concentration of lead (Pb) exceeded the limit value for land …
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The incineration fly ash (HFA) produced by this system exhibits characteristics distinct from those of typical incineration fly ash, necessitating the use of adjusted disposal methods.
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Hydraulic Conductivity. The physical containment capability of a liner system depends heavily on hydraulic conductivity, which must remain at <9×10 –9 m/s for all sorts of waste. In order to meet this threshold, the compacted clay liner must possess intrinsic properties of minimum fines content of >20–30%, gravel content of <30%, plasticity index of <7–10%, and …
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However, in most of the cases, the end product of fly ash is a waste material that is dumped into landfill sites because utilization rate of fly ash in most of the developing countries is not . For instance, the average …
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For Prelims: Fly Ash Management and Utilisation Mission, National Green Tribunal, Central Pollution Control Board, Fly Ash Notification, Rihand Reservoir. For mains: Government Policies & Interventions, Environmental Pollution & Degradation, Fly Ash and Related Issues, Fly Ash …
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The utilization of fly ash as the primary feedstock for zeolite synthesis offers a compelling approach for waste valorization, aligning with the core tenets of green chemistry (Zhang et al., 2017, de Aquino et al., 2020). Fly ash-derived zeolites have garnered significant interest due to their potential for high-value applications.
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However, circulating fluidized bed fly ash (CFBFA), a by-product, is being discharged in increasing quantities with the growing use of CFB boilers, more than 280 million tons annually in China [20] and 14 and 1.5 million tons in the United States of America and Europe, respectively [21, 22]. Further, even greater quantities of CFBFA are likely ...
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2.1 Geopolymer precursor characterization. Class F fly ash was obtained from local industry, Lafarge Malayan Cement Bhd of Malaysia. The chemical composition of the fly ash used in this research as determined by X-ray florescence (PANalytical Axios mAX instrument) was shown in Table 1.The particle size analysis was performed by Mastersizers Malvern …
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The drivers of collaborative innovation of the comprehensive utilization technologies of coal fly ash in China: a network analysis
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WASHINGTON – The U.S. Environmental Protection Agency (EPA) announced that it is prioritizing a number of timely actions on coal ash, including state permit program …
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Fly ash is currently used by the National Highway Authority of India in the amount of 60 lakh cubic metres, and a project in the future is expected to use 67 lakh cubic metres [33], [55], [85], [86], [87]. Fly ash bricks use a lot of fly ash, thus the fly ash performs a sustainable function.
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Additionally, CaCl 2 /Ca(OH)Cl is found to be the main chlorine species in various fly ashes (Zhu et al., 2008), including coal fly ash (Viader et al., 2017), and municipal solid waste ...
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The results of X-ray diffraction (XRD) of fly ash before adsorption, the characteristics of fly ash minerals are crystals. The dominant minerals are quartz (SiO 2 ) and mullite (Al 6 figure 1 and ...
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Fly ash (FyA), a byproduct from coal combustion in power plants, has become increasingly valuable due to its pozzolanic properties. Primarily, FyA finds applications in the construction industry, including road and brick construction, forest road …
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A Comprehensive Review on Fly Ash-Based Geopolymer. July 2022; Journal of Composites Science 6(8):219; ... state-of-the-art applications such as the immobilization of toxic or radioactive wastes ...
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In this study, based on the mechanism of geopolymerization, the effects of nano-SiO 2 on the properties of fly ash-based geopolymers including compressive strength, microstructure, hardening ...
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Fly ash collected from the flue of a power plant's circulating fluidized bed furnace is referred to as circulating fluidized bed (CFB) fly ash. The high pozzolanic activity of CFB fly ash has potential benefits for the production of environmentally friendly building materials.To actualize the sustainable and large-scale utilization of CFB fly ash in the field of building materials, this ...
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Municipal solid waste incineration (MSWI) fly ash commonly has substantial amounts of leachable toxic heavy metals, such as Cd, Cr and Pb etc., which are hazardous to environment and mankind (Wang et al., 2019; Xu et al., 2019). It is reported that the fly ash produced in 2017 in China was approx.
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Coal fly ash accounts for 5–20 wt.% of feed coal and is typically found in the form of coarse bottom ash and fine fly ash, which represent 5–15 and 85–95 wt.% of the total ash generated, respectively.Coal ash is discharged by both wet and dry methods of coal combustion. Bottom ash refers to the ash that falls down through the airflow to the bottom of the boiler and …
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The fly ash used in this study was obtained from an MSWI plant in southwest China. To prevent the effects of uneven sample collection, a five-point sampling method was used. For each batch used in the study, 500 g of fly ash was collected and triplicate sampling was conducted. The fly ash had a pH of 12.58 and water content of 0.82%.
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