The effective and safe use of FGD gypsum in agricultural land is still debated in some countries even though its effectiveness in soil management has been reported in many studies. Thus, the changes in the levels of soil salinity, alkalinity, crop yield, and other physicochemical properties in different soil types and crops after reclamation and planting with …
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The production of flue gas desulfurization gypsum poses a serious threat to the environment. Thus, utilizing gypsum-based self-leveling mortar (GSLM) stands out as a promising and effective approach to address the issue. β-hemihydrate gypsum, cement, polycarboxylate superplasticizer, hydroxypropyl methyl cellulose ether (HPMC), retarder, and deer were …
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gypsum was divided into deta il, and its comprehensive utili-zation status was analyzed.14) Secondly, some progress has been made in the research of desulfurized gypsum as a waterproofing agent, and a new type of building gypsum-based waterproofing agent has been prepared.15) In addi-tion, a new type of high-efficiency inorganic composite
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Its main components are dihydrate gypsum and hemihydrate gypsum, which have good solubility and are similar to natural gypsum [29], [30]. There are few reports on the effect of different contents of desulfurization gypsum on the formation rate of ettringite. The role of desulfurization gypsum in BSAC hydration remains to be further studied.
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From the setting time of desulfurized gypsum, the addition of a naphthalene-based water reducer will not affect the initial setting time of gypsum but can effectively shorten the final setting time of gypsum; the addition of melamine has little effect on the setting time of gypsum, and basically does not affect the setting time; polycarboxylic ...
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The main components of desulfurized gypsum are sulfates and crystal water, which can play inhibitory roles in the digestion of lime [13, 14], further affecting the material performance. In order to quantitatively analyze the influence of desulfurized gypsum on material performance, local desulfurized gypsum was used for comparison.
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What Is Obvious Advantage of Desulfurized Gypsum Briquette Press. Submitted by: Submitted by pingpang. Views: 83. Words: 304. Pages: 2. Category: English Composition. Date Submitted: 07/26/2014 12:54 AM. ... Desulfurization gypsum pressure ball press machine the compressive strength of 30 n, greatly improving the transport efficiency, pellets ...
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The undisturbed desulfurization gypsum after screening was calcined at 180 °C for 2 h and sealed at room temperature for about 7 d to form semi-hydrated desulfurized gypsum. Fig. 1 shows the microscopic morphology and X-ray diffraction (XRD) diagram of desulfurization gypsum. The quicklime was taken from Yibin Chuanhui Biological Technology Co ...
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The characteristic of rapid setting is the biggest disadvantage of building gypsum in traditional construction. ... a cementitious material was prepared using ground granulated blast furnace slag (GGBS), carbide slag (CS) and desulfurized gypsum (DG). Utilizing the Box-Behnken design under the response surface method, the content of DG and CS ...
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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 of …
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Reduced water and energy consumption, landfill avoidance, and preservation of natural resources are just some of the advantages flue gas desulfurization (FGD) gypsum offers when used to manufacture gypsum panels. For more than 20 years, Gypsum Association members have successfully and safely developed and deployed technologies to use flue FGD gypsum as a …
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Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. Due to its abundance, chemical and …
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Wansom et al. replaced natural gypsum in the cement industry by modified CDA from power plant in Thailand. It was found that the disadvantages of unmodified CDA for …
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Performance regulation of desulfurized gypsum on solid waste-based road base materials: Hydration characteristics and environmental performance. Author links open overlay panel Pengfei Wu a b, ... using industrial solid waste for the preparation of road base materials offers significant economic and environmental advantages [6].
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At present, the industrial utilization of desulfurized gypsum has become one of the main research directions of scholars. Comprehensive utilization of desulfurized gypsum conforms to the concept of green and low-carbon development. Therefore, full research on the comprehensive performance of desulfurized gypsum in different systems will greatly ...
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In the early stage of hydration reaction, the slag and desulfurized gypsum had the greatest influences, which were attributed to the AFt produced by further reaction between desulfurized gypsum and slag hydration products. Cement clinker had the weakest influences on both the 7-d and 28-d strengths.
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of Bayer RM in cementitious materials. Considering this, desulfurized gypsum (DG) was selected as a sulfate activator in this paper. Desulfurized gypsum is an industrial byproduct produced by thermal power plants (Han et al., 2016). It is acidic and can pollute the soil and water (Panda et al., 2017), and its main component is gypsum dihydrate ...
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Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. ... One of the important new applications is water treatment, which takes advantage of FGDG's alkaline pH, ... (Oriza sativa L.) growth and yield using desulfurized gypsum in the west of Songnen ...
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Desulfurized gypsum has high water content and high fluidity, only suitable for belt transportation. Desulfurization gypsum and natural gypsum are different in dehydration, grindability and mechanical properties of calcined gypsum …
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However, the mechanical properties of desulfurized gypsum could be decreased by more than 60 %. Compared with single-doped retarders, combined retarders had obvious advantages. They not only significantly lengthened the setting time and hardening time two-fold or even more but also the compressive strength of desulfurized gypsum with combined ...
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The particle size curve is narrow and lean, so when plastering plaster is prepared using desulphurised building plaster alone, it will result in problems such as poor slurry and …
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Desulfurized ash contains about 21.33% hemihydrate calcium sulfite, 18.11% calcium carbonate, 28.55% dihydrate gypsum, 25.81% calcium hydroxide, 1.85% calcium oxide. Particle size distributions of hemi-hydrate gypsum and desulfurized ash are given in Fig. 1 A. The specific surface areas of desulfurized ash and hemihydrate gypsum are 351 and
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This work innovatively combines the advantages of desulfurized gypsum and carbide slag to fabricate the skeleton material. By regulating the ratio of desulfurization gypsum and carbide slag, a skeleton material with excellent heat storage capacity, compressive strength, energy saving, and low carbon content can be obtained.
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Also, alkali-activated materials have disadvantages such as slower strength growth, having rheological properties that are difficult to evaluate [6], the interference of the type of curing in …
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Its main components include desulfurized gypsum (DG), phosphogypsum (PG), and titanium gypsum (TG), with smaller amounts of fluorogypsum, salt gypsum, and others [1,2,3]. ... With in-depth research on BPG, scholars have increasingly recognized its significant advantages when utilized in the preparation of cementitious materials [8,59].
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Nevertheless, traditional cement-based self-leveling mortar has disadvantages such as poor thermal conductivity and low construction efficiency . Gypsum, with its early …
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Desulfurized gypsum can not only improve saline-alkali soils and increase crop yields; it can also be used as an additive to make cement, concrete, wall materials, etc. The …
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Desulfurized gypsum is a common soil amendment that has been used repeatedly alongside organic materials to improve the biological, physical, and chemical properties of saline soil. ... The TV treatment also showed obvious advantages, with an increase ranging from 6.45% to 34.59%. The differences in soil SPA and SSA activities between TV and TS ...
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To resolve the limited large-scale methods of disposal of low calcium fly ash with poor activity, based on the double excitation principle, clinker and desulfurized gypsum are used as alkali/salt ...
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Basalt fiber (BF) and polyvinyl alcohol fiber (PVAF) were mixed into desulfurized gypsum-based composite cementitious material (DGCCM) by an orthogonal test to prepare hybrid fiber-reinforced ...
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Advantages of Gypsum Plaster. Easy to apply and shape – Gypsum plaster goes on walls and ceilings smoothly and can be easily molded into different shapes, making it convenient for decorative purposes.; Quick setting time – It sets and dries faster than many other plasters, which helps speed up the construction process.; Smooth finish – Once dried, it leaves a uniform, …
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Desulfurisation gypsum is an industrial by-product obtained from the desulfurisation and purification of coal-fired flue gas. It is produced by grinding quicklime or limestone and reacting it with sulphur dioxide in the flue gas to form calcium sulfate dihydrate with fine particles, high water content and a large specific gravity. Its fineness generally ranges …
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[1] Yu D. G., Yang X. Y. and Yang S. Z. 2006 A Research on the Properties and Microstructure of Hemihydrate Gypsum Journal of Wuhan University Technology 28 27-29 Google Scholar [2] Kong Y. S., Zhang J. Z. and Kong R. Q. 2016 Researches on Copper Alloy Plaster Precision Casting Process Foundry Technology 37 1071-1073 Google Scholar [3] Wang Q. M., …
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