Research on optimizing performance of desulfurization …

The obtained semi-aqueous desulfurized gypsum was the original desulfurized gypsum, which was placed in an oven at 180 °C and dehydrated for 2 h …

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Superfine Desulfurization Gypsum can Improve the Strength …

Tens of millions of tons of desulfurized gypsum can be produced in China every year. Desulfurization gypsum is used as an admixture to replace part of cement in concrete. …

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Influence of Various Treating Methods for Desulfurized Gypsum …

In this research, the influence of desulfurized gypsum (FGD) with different carbon removing methods of 0.3 mm sieving, and 500^{circ}C high temperature combustion on high volume blast furnace ...

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The Role of Gypsum in Cement | PDF

The Role of Gypsum in Cement - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Gypsum is added to cement to regulate the setting reaction that occurs when cement mixes with water. It slows …

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Utilization of low-quality desulfurized ash from semi-dry …

It was reported that soot materials can be made by desulfurized gypsum, fly ash and lime, producing strength in the process of consolidation ... [21]. Besides, it can be also used for cement production in a similar way to naturally-occurring gypsum for ... Although appearance of desulfurized ash plays a negative role on the hardened paste ...

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High value-added utilization of desulfurized building gypsum …

Desulfurized building gypsum (DBG) has great application potential and can be used to produce lightweight plastering gypsum (LPG). In this work, DBG was modified by adding different proportions of ...

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The role of gypsum in cement

Shreesh Khadilkar reviews the present situation of gypsum, and takes us through a variety of gypsum products, its merits and demerits. Gypsum (CaSO4.2H2O) is used widely in various industries either as gypsum, i.e., the gypsum di-hydrate crystalline variety or as the gypsum hemi hydrates, also known as plaster of Paris (POP) or …

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Effect of curing temperature on the reaction kinetics of …

Effect of curing temperature on the reaction kinetics of cementitious steel slag-fly ash-desulfurized gypsum composites system. Author links open ... used grinding steel slag powder with a size of 0–5 mm to produce composite cement with strength classes of 42.5 and 32.5 of European Standard EN 197–1. The content of steel slag …

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Desulfurization gypsum uses and properties

2. When desulfurization gypsum is used as a cement retarder to prepare cement, the cement has a larger specific surface area than the natural gypsum during the same grinding time. The grindability of desulfurized gypsum is better than natural gypsum, and the desulfurized gypsum itself is a fine powdery material.

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A comprehensive review of flue gas desulphurized gypsum: …

It also reviews the various applications of FGD gypsum, such as in cement and concrete production, agriculture, and gypsum board manufacturing. In the construction industry, FGD gypsum is widely used as a raw material for producing gypsum products, such as plasterboard and cement, due to its high purity and low cost.

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Study of Desulfurized Gypsum Drying

The desulfurized gypsum from power plant flue gas is the largest resource of industrial by-product gypsum. By adopting advanced processes such as drying and calcination, it is applied in gypsum ...

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Influence of Early Strength Agent on the Strength and Water …

The test takes the cementing system composed of ordinary Portland cement and desulfurized building gypsum as the research object, and the research is carried out based on the mechanism of the early strength agent that can accelerate the cement hydration reaction in the composite cementing system. In the experiment, the influence …

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The Role of Gypsum in Cement | PDF | Cement | Concrete

This document discusses the role of gypsum in cement. Gypsum is added to cement to control workability, setting time, mechanical performance, and shrinkage/expansion. The optimal gypsum content allows cement to be workable when mixed with water but also hardens and gains strength over time. The dissolution rate of gypsum and the reactivity …

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Study on the influence mechanism of flue gas desulphurisation gypsum …

In the limestone gypsum flue gas desulphurisation process, 2.7 tons of FGDG can be produced for every 1 ton of SO 2 that is removed [2]. Compared with natural gypsum, FGDG has a smaller and more uniform particle size and a larger specific surface area; therefore, FGDG has a certain importance in industry.

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Research on optimizing performance of desulfurization-gypsum …

The obtained semi-aqueous desulfurized gypsum was the original desulfurized gypsum, which was placed in an oven at 180 °C and dehydrated for 2 h under synchronous heating with the box. The microscopic morphology of desulfurization gypsum from SEM and XRD analysis is shown in Fig. 1. The original desulfurization …

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Uses of Gypsum in Cement

Gypsum plays an essential role in the manufacturing of cement. It contributes to the strengthening, workability, setting time, and durability of the cement. The careful use of gypsum in cement production leads to enhanced performance, improved longevity, and advanced construction practices, making it an essential component in the …

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Utilizations of preheated flue gas desulfurization gypsum …

Current study proposes an effective way to modify the properties of super-sulfated cement (SSC) paste and mortar with preheated flue gas desulfurization (FDG) gypsum at different temperatures and durations, and different sulfate compositions. Preheated FGDs with temperatures between 25 and 150 °C and durations between 0 …

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Superfine Desulfurization Gypsum can Improve the Strength of Cement

Tens of millions of tons of desulfurized gypsum can be produced in China every year. Desulfurization gypsum is used as an admixture to replace part of cement in concrete. And the smaller the particle size of desulfurized gypsum, the better the mechanical properties of cement mortar. The compressive and flexural tests show that the cement …

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The role of gypsum in the production of cement?

The retardation mechanism of gypsum is: when cement is hydrated, ... Gypsum plays a very important role in controlling the rate of hardening of the cement. During the manufacturing of cement ...

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High value-added utilization of desulfurized building …

The utilization of desulfurized building gypsum a s raw mater ial f or gypsum-based s elf-leveling mort ar (GSL) is limited by its low str ength and poor water …

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Effects of hybrid fibers on properties of desulfurized gypsum …

1. Introduction. Flue gas desulfurization gypsum (FGDG) is an industrial byproduct produced by limestone-gypsum wet desulfurization to treat SO 2 produced by thermal power plants and coal-fired plants, whose main component is CaSO 4 ·2H 2 O. In wet desulfurization, 1 t of SO 2 produces about 2.7 t of FGDG [1], [2].Some 130 million …

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Effects of flue gas desulfurization gypsum incorporation and …

In addition, the application of FGDG in soil irrigation can reduce the ESP and pH of the soil to some extent [33]. FGDG can also be used in combination with fly ash, which can be used in large quantities as backfill material [34]. Tzouvalas et al., (2004) [35] added FGDG to cement as a retarder, which can partially replace the role of natural ...

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Investigation on the effects of desulfurization gypsum on the

Thermal treatment and utilization of flue gas desulphurization gypsum as an admixture in cement and concrete. Construct. Build. Mater., 22 ... Preparation, …

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(PDF) The Key Application Technology of Desulfurized …

Abstract and Figures. In this paper, in view of the problem of low early and late strength of dry-mixed mortar prepared by cement-fly ash-slag powder composite …

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Influence of solid waste gypsum and additives on the …

With rapid economic and social development, significant amounts of coal-based and gypsum solid waste are generated daily. However, the high cost of sulfate aluminum cement has limited its widespread application. Notably, when the dosage of desulfurized gypsum reached 8%, the strength of the cementitious material at different …

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High value-added utilization of desulfurized building gypsum …

The utilization of desulfurized building gypsum as raw material for gypsum-based self-leveling mortar (GSL) is limited by its low strength and poor water resistance. ... the standard consistency of cement was lower than building gypsum. Cement could also act as a water-reduction agent instead of gypsum. ... (1996) THE FILLING ROLE OF …

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High value-added utilization of desulfurized building …

The utilization of desulfurized building gypsum as raw material for gypsum-based self-leveling mortar (GSL) is limited by its low strength and poor water resistance. ... the …

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Properties and microstructure of soil solidified by titanium …

An innovative approach suggests using titanium slag and flue gas desulfurized gypsum as substitutes for Portland cement for soil solidification. This study systematically evaluates the effects of titanium slag-flue gas desulfurized gypsum-Portland cement composite (TS-FGD-OPC composite) solidifier on the performance of …

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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 …

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