In this work, five different by-products of the coal industry (bottom ash (BA), fly ash, desulfurized gypsum, gasification slag, and coal gangue) and cement were used as mixtures to prepare multi-component coal industry solid waste-based CLSM. ... Rani, R.; Jain, M.K. Effect of bottom ash at different ratios on hydraulic transportation of fly ...
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In this study, a new type of flowable lightweight soil, called desulfurized gypsum–fly ash flowable lightweight soil, was formulated using fly ash, industrial waste …
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Wang Q., Li M., Yang J. D., Cui J. Y. Mechanical Strength of Solidified Lead Contaminated Soils by Cement, Fly Ash and Desulfurized Gypsum. ... This article was published in Transportation Research Record: Journal of the Transportation Research Board. VIEW ALL JOURNAL METRICS. Article usage * Total views and downloads: 104
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Red mud (RM), fly ash (FA) and desulfurized gypsum (DG) are harmful solid wastes that need to be treated. In this study, RM, FA, DG were used as the main raw materials to prepare road base materials based on the different (CaO + Na2O)/(SiO2+Al2O3) molar ratio, and its mechanical properties, durability, microstructure and environmental performance were investigated.
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Mica schist weathered soil possesses a number of poor engineering characteristics, which make it difficult to use as a subgrade material for resource utilization. Therefore, in this study, a new type of curing agent, CFSD (cement–fly ash–slag–desulfurized gypsum), is proposed for this soil. The effects of different curing agent dosages, age of …
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Most of the DFA was converted into low-value desulfurized gypsum [17,18]. Therefore, a large amount of DFA is currently deposited in the open air, which has seriously harmed the environment [19]. DFA as a type of industrial solid waste, ... Catalytic Pyrolysis of Sawdust with Desulfurized Fly Ash for Pyrolysis Gas Upgrading ...
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Even though the underlying mechanism was described as adsorption, a detailed explanation was not given. Other researchers used coal fly ash to remove dye in aqueous phase, explaining that SiO 2 and Fe 2 O 3 present in the fly ash were involved in the dye adsorption process (Dizge et al., 2008, Kumar et al., 2005, Lin et al., 2008, Sun et al ...
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By using one type of original red mud and three types of fly ash, this study revealed that with high alkalinity and desulfurization capacity, the red mud could serve as an excellent FGD sorbent. After FGD, the sodium sulfate in the desulfurized red mud acted as a chemical activator for geopolymer made with class C fly ash.
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The longer IST is beneficial to the application of FGDG polymer materials because of long-distance transportation from the mixing plant ... Li Z., Ren Y., Wang Y., Zhang W. Preparation, characterization and application of red mud, fly ash and desulfurized gypsum based eco-friendly road base materials. J. Clean. Prod. 2021; 284:124777. doi ...
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gypsum-fly-ash adhesive and found that different amounts of desulfurized gypsum and quicklime have different effects on the activation of fly ash. Zhu et al. [26] selected Ⅰ and Ⅱ grade fly ash as full-tail-filling cementing materials and lime and gypsum …
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fly ash, desulfurized gypsum, cement and silt are poured into the mixer for dry mixing for about 1 min. Next, pour half of the weighed water and stir for 30 s, followed by adding the
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Flue gas desulfurized gypsum (FGDG) is a waste material produced in the power stations during the flue gas desulfurization process. In China, a small amount of FGDG is used as cement additives or for gypsum boards, but there still exist a mass of FGDG due to the lack of reusing methods. ... Improved geopolymerization of bottom ash by ...
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The experimental analysis revealed that the influence of the desulfurized gypsum content on the strength at 3, 7, and 28 days is greater than that of the cement clinker content. ... such as fly ash and blast furnace slag, as alternatives to traditional cementitious materials. In 1989, Amaratunga and Annor [22] ... transportation, use, to final ...
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It was found that when red mud, fly ash, and desulfurized gypsum are used to prepare road base materials, in the case of (CaO + Na 2 O)/(SiO 2 + Al 2 O 3 ) = 0.88, the UCS of road base materials ...
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The single-factor experiments are designed to quantitatively investigate the effects of silica fume, mineral powder, and fly ash on the mechanical and thermal insulation properties of desulfurization gypsum-based …
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In this study, the potential of using desulfurized gypsum (DG), phosphogypsum (PG), gypsum dihydrate (G), and calcium carbide slag (CS) in the production of supersulfated cement (SSC) was investigated. ... Performances and microstructure of one-part fly ash geopolymer activated by calcium carbide slag and sodium metasilicate powder," Constr ...
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In 2010, about 10 million tons of desulfurized ash was produced, making it the third largest solid waste in China, only after fly ash and desulfurized gypsum [10], [11], [12]. The annual production of desulfurized ash from newly added by-products in China is approximately 15 million tons, and it will accumulatively reach several billion tons by ...
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new type of curing agent, CFSD (cement–fly ash–slag–desulfurized gypsum), is proposed for this soil. The effects of different curing agent dosages, age of preservation, and confining ...
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In this study, fly ash (FA), gypsum and steel slag (SS) were used to prepare cement-based composites (CBC). The uniaxial compression, computed tomography (CT) and scanning electron microscope (SEM ...
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Red mud (RM), fly ash (FA) and desulfurized gypsum (DG) are harmful solid wastes that need to be treated. In this study, RM, FA, DG were used as the main raw materials to prepare road base materials based on the different (CaO + Na 2 O)/(SiO 2 +Al 2 O 3 ) molar ratio, and its mechanical properties, durability, microstructure and environmental performance were investigated.
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In this study, superfine fly ash slurry [WGFA] was prepared by wet grinding from the coal fly ash. Cement-fly ash binder with 30%, 50%, and 70% dosage of fly ash was designed, with a water/binder ...
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Effects of kaolin addition on mechanical properties for cemented coal gangue-fly ash backfill under uniaxial loading," Energies. 14, 3693 (2021). ... Research on water-resistant gypsum blocks made from flue gas desulfurized gypsum ... Pipeline transportation model with pressure pulsation for high-concentration viscous paste," Phys. Fluids ...
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Using solid wastes (SWs) as backfilling material to fill underground mined-out areas (UMOAs) solved the environmental problems caused by SWs and reduced the backfilling cost. In this study, fly ash (FA), gypsum and steel slag (SS) were used to prepare cement-based composites (CBC). The uniaxial compression, computed tomography (CT) and scanning …
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Most of the fly ash is of spherical structure, with finer particles. The particle size is mostly distributed below 200 µm, and its composition is SiO 2. Desulfurized gypsum is distributed in a thin-walled and columnar structure, and a small amount of desulfurized gypsum can promote the improvement of early compressive strength.
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Desulfurized gypsum is an industrial by-product gypsum obtained after flue gas desulfurization in coal-fired or oil-fired power plants [1]. Its main components and physical and chemical …
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Industrial solid waste—such as red mud (RM), desulfurization gypsum (DG), fly ash (FA), coal gangue (CG), and blast furnace slag (BFS)—is emitted by aluminum oxide plants, power …
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To resolve problems caused by the accumulation of flue gas desulfurization gypsum (FGDG) in the environment, a polymer material was prepared using FGDG, granulated blast furnace slag …
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Recently, the steel slag-fly ash-desulfurized gypsum (SS-FA-DG) composite system was developed as a novel building cementitious material, however, its reaction mechanism and reaction process mains unclear. This paper investigated the reaction kinetics of SS-FA-DG composite system by evaluating the influence of curing temperature on the ...
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Transportation Research Record Journal of the Transportation Research Board 2676(1):0361; ... Fly Ash and Desulfurized Gypsum. Jan 2019; 7755-7762; Q Wang; M Li; J D Yang; J Y Cui;
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3 School of Civil Engineering and Transportation, Permafrost Institute, Ministry of Education Northeast-China Station of Permafrost Geo-Environment, Northeast Forestry ... Therefore, in this study, a new type of curing agent, CFSD (cement-fly ash-slag-desulfurized gypsum), is proposed for this soil. The effects of different curing agent dosages ...
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