Synergistic effect of red mud, desulfurized gypsum and fly …
Preparation, characterization and application of red mud, fly ash and desulfurized gypsum based eco-friendly road base materials. J. Clean. Prod., 284 …
Experimental Study on Desulfurized Gypsum Modified …
Geopolymer can be synthesized by polycondensation reaction of geopolymeric precursor, and alkali polysilicates. The MgO cement can be obtained by properly mixing MgO particles, fly ash, and phosphate.
Gypsum treated fly ash as a liner for waste disposal facilities
The leaching of metal ions from fly ashes is a function of liquid (L) to solid (S) ratio (L/S) as well as the pH of the system. The laboratory leaching test for combustion residues developed by Van der Sloot et al. (1984) has been adopted to study the leaching phenomenon. Table 4 shows the total contents of selected trace elements present in …
Effect of Industrial Byproduct Gypsum on the Mechanical …
Industrial byproduct gypsum (BPG) is a secondary product that is mainly composed of calcium sulfate discharged during industrial production. BPG primarily consists of desulfurized gypsum, phosphogypsum, and titanium gypsum, which account for 88% of the total BPG in China. The large-scale utilization of these three types of solid waste …
Vietnam imports desulfurized gypsum to meet building …
The desulfurization gypsum loaded on the train will be transported by sea and arrive at the Jinpu Terminal in Vietnam 15 days later. It has expanded the previous domestic transportation mode to international, broadened the sales radius of desulfurization gypsum, and helped "Turning waste into treasure".
Performance Characterization and Composition …
Fly ash–slag-based alkali-activated materials have excellent mechanical performance and a low carbon footprint, and they have emerged as a promising alternative to Portland cement. Therefore, …
Properties and microstructure of soil solidified by titanium …
The Portland cement-fly ash-desulfurized gypsum composite solidifier brings the dredged soil to have higher strength and good resistance to dry-wet cycles [24]. Titanium slag is the residue after the titanium extraction from high titanium-type blast furnace slag. Currently, there are 80 million tons of titanium slag in China, with an annual ...
Study on Mechanical and Microscopic Properties of …
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 …
Sustainability | Free Full-Text | The Effect of Bottom Ash Ball …
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 ...
Mechanical Properties and Coagulation Characteristics of …
In the limestone gypsum flue gas desulfurization process, 2.7 ton of desulfurized gypsum can be generated for each 1 ton of SO 2 removed . A 300 MW coal-fired thermal power unit discharges about 30,000 ton of desulfurized gypsum every year (assuming 1.0% sulfur in coal) . A substantial amount of desulfurized gypsum is generated as a by-product ...
Particle size distributions of fly ash (FA) and desulfurization …
Two types of SWs, including fly ash (FA) and desulfurized gypsum (DG), were used to prepare cementitious backfilling materials for underground mined-out areas. Ordinary …
Effect of curing temperature on the reaction kinetics of …
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 …
Influence of Calcined Flue Gas Desulfurization Gypsum and …
In order to improve the early strength of fly ash blended cement concrete under steam curing conditions, fly ash was partly substituted by calcined flue gas desulfurization (FGD) gypsum and active calcium aluminate. The effect of the composition and curing condition on the workability, mechanical property, and volume stability was systematically …
Synergistic effect of red mud, desulfurized gypsum and fly ash …
The synergistic effect of red mud – desulfurized gypsum - fly ash was found. • Sample RDFC6 achieved high content of solid waste and high mechanical performances. • The influence of synergistic effect on …
Utilization of low-quality desulfurized ash from semi-dry …
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 …
Analysis of Strength and Microstructural Characteristics of …
The utilization of solid wastes (SWs) as a potential resource for backfilling is not only conducive to environmental protection but also reduces the surface storage of waste. Two types of SWs, including fly ash (FA) and desulfurized gypsum (DG), were used to prepare cementitious backfilling materials for underground mined-out areas. …
Strength and Microscopic Mechanism of Cement–Fly Ash…
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 preservation, and confining pressure on the stress–strain curves were analyzed via the uniaxial compression test and triaxial compression test, while the ...
Preparation, characterization and application of red mud, fly ash …
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 …
Influence of Calcined Flue Gas Desulfurization Gypsum and …
In order to improve the early strength of fly ash blended cement concrete under steam curing conditions, fly ash was partly substituted by calcined flue gas desulfurization (FGD) gypsum and active ...
Minerals | Special Issue : Innovative Strategies for …
The utilization of solid wastes (SWs) as a potential resource for backfilling is not only conducive to environmental protection but also reduces the surface storage of waste. Two types of SWs, including fly …
Modification mechanism of flue gas desulfurization gypsum on fly ash
Modification mechanism of flue gas desulfurization gypsum on fly ash and ground granulated blast-furnace slag alkali-activated materials: Promoting green cementitious material ... Preparation, characterization and application of red mud, fly ash and desulfurized gypsum based eco-friendly road base materials. J. Clean Prod., 284 …
Influence of Calcined Flue Gas Desulfurization Gypsum …
the low early strength of the fly ash-desulfurized gypsum system, this study innovatively ... FGD gypsum, and fly ash are shown in Table 1. Table 1. The chemical composition of P.II.52.5 Portland cement, FGD gypsum, and fly ash (wt/%). Item CaO SiO 2 Al 2O 3 Fe 2O 3 MgO SO 3 TiO 2 K 2O Portland cement 61.3 20.8 6.3 3.1 …
Processes | Free Full-Text | Synergetic Mechanism of Multiple …
In order to improve the comprehensive utilization rate of industrial solid waste and the road quality, a novel low-carbon and environmental friendly soil stabilizer is proposed. In this study, steel slag (SS), carbide slag (CS), blast furnace slag (BFS), fly ash (FA), and desulfurized gypsum (DG) were used as raw materials to develop a multiple …
Catalytic Pyrolysis of Sawdust with Desulfurized …
In this study, the catalytic effects of desulfurized fly ash (DFA) on the gaseous products of sawdust (SD) pyrolysis were investigated in a tubular furnace. The results indicated that DFA catalyzed the …
Preparation, characterization and application of red mud, fly …
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 …
Study on the Micro Mechanism of Failure Evolution of
To investigate the macroscopic mechanical properties and failure evolution mechanism of desulfurization gypsum–fly ash fluid lightweight soil, a microscale …
Effect of curing temperature on the reaction kinetics of …
Solid waste-based binders have been widely studied for decades. 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.
| SEM images of the fly Ash particles (a) in shielded desulfurized …
Download scientific diagram | | SEM images of the fly Ash particles (a) in shielded desulfurized gypsum samples and (b) with desulfurized gypsum samples. from publication: Solidification ...
Minerals | Free Full-Text | Characterization of Macro …
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 …
Modification mechanism of flue gas desulfurization gypsum …
Modification mechanism of flue gas desulfurization gypsum on fly ash and ground granulated blast-furnace slag alkali-activated materials: Promoting green …