Synthetic gypsum can be a substitute for natural gypsum and as cement admixtures, gypsum-based plasters, drywalls and more [18]. ... It was found that STPP acted …
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When used as cement retarder, ... Wansom et al. replaced natural gypsum in the cement industry by modified CDA from power plant in Thailand. It was found that the …
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FGDG is mainly used for cement retarder [3], [5], [6] in building gypsum and other gypsum products, but the dosage proportion is not high. It is used as a road curing filling …
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The main utilization method of FGD gypsum is still used in construction materials (Ye et al., 2019). As an auxiliary material or instead of natural gypsum, it can be widely used in …
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In order to explore the influence of the types of waste gypsum on the properties of alkali slag cement, fluorogypsum (FG) and flue-gas desulfurization (FGD) gypsum were comparatively investigated. Moreover, the …
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FGD gypsum can be made into desulfurized construction gypsum and high-strength gypsum after the calcination process. ... Subsequently, the retarder was dissolved to …
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The desulfurized gypsum treated with hydrogen peroxide can improve the stability of cement. When the proportion of desulfurized gypsum and natural gypsum is 1:1 and the …
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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 …
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This work aimed to investigate the feasibility of utilizing the low-quality desulfurization ash from semi-dry flue gas desulfurization by mixing with α-hemihydrate …
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Flue gas desulfurized gypsum (FGDG) is an industrial by-product discharged from thermal power plants, smelters, and large-scale enterprise boilers. ... At present, FGDG is …
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Citric acid, sodium gluconate, and sodium tripolyphosphate were used to design and prepare a desulfurized gypsum paste containing single or combined retarders. The effects …
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Desulfurization-gypsum-based composite cementitious materials were prepared by adding certain proportions of sulfoaluminate cement, mineral powder quick lime, retarder, and …
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The invention discloses a desulfurized gypsum retarder, a preparation method and application thereof in sulphoaluminate cement, wherein the method comprises the following steps: the …
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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. ... be due to …
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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 …
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This paper describes replacing natural gypsum with FGD gypsum as cement retarder, the influence on the working performance, compressive strength and admixture …
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In addition, the installation of APCDs drastically increases the output of FGD gypsum, which can be reused in the production of building materials (e.g., plastering gypsum, …
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After many grinding mixture ratio tests in laboratories,the paper studies the effect on ordinary cement and slag cement of desulfurized gypsum as cement retarder,instead of raw …
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The invention discloses a desulfurized gypsum retarder, a preparation method and application thereof in sulphoaluminate cement, wherein the method comprises the following steps: the …
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Cement clinker minerals, mineral powder, and active calcium aluminate were dissolved in water to produce Al(OH) 4− and OH − after water was added to the Portland …
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After many grinding mixture ratio tests in laboratories,the paper studies the effect on ordinary cement and slag cement of desulfurized gypsum as cement retarder,instead of raw …
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It also reviews the various applications of FGD gypsum, such as in cement and concrete production, agriculture, and gypsum board manufacturing. In the construction …
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In cement applications, FGD gypsum can be used as a retarder in cement production. FGD gypsum has a low impurity concentration and is a suitable substitute for …
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According to statistical data, in 2020, the desulfurized gypsum emissions of China reached about 147 million ton, which increased to more than 161 million ton in 2021 and continues increasing . …
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The aim of this paper is to investigate the possible displacement of natural gypsum (CaSO4·2H2O) in cement with an alternative setting retarder, such as the industrial by-product …
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FGDG can be used as an ingredient in cement, in the production of asphalt, and as a set retarder in concrete and grout. The primary land application of FGDG is its use as a soil amendment …
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It is feasible to use desulfurized gypsum as retarder of Portland cement. When the content of desulfurized gypsum after 80℃ heat treatment is 4% of Portland cement, the setting …
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The particle size reduction and crystalline phase change of the FGD gypsum used as a cement retarder has an uncertain effect on the properties of the cemented materials and …
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The gypsum desulfurized in power plants is only a primary product and needs to be reprocessed. However, as a kind of waste, we must rationalize resources and can do many …
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Desulfurization gypsum, also known as FGD gypsum (flue gas desulfurization gypsum), is an industrial by-product gypsum obtained by desulfurization and purification of flue gas generated after combustion of sulfur-containing fuel (coal, oil, etc.), and its composition is calcium sulfate … See more
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