Flue gas desulfurization gypsum (FGDG) is an industrial by-product generated during the flue gas desulfurization process in coal-fired power plants. Due to …

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. ... The final setting time was recorded as the time until the test needle did not leave a circular impression on ...

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 ...

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 ...

Fly ash and desulfurized gypsum used in this experiment were from Shanxi Power Generation Co., Ltd. The coal gangue came from Yangquan, Shanxi. The cement was ordinary 42.5 cement sold on the market. The main chemical components of red mud, fly ash and desulfurized gypsum were analyzed by XRF, and the results are …

The synergistic effect of red mud – desulfurized gypsum ... Cement used in this test was commercially available PⅠ 42.5 ordinary portland cement. The aggregate was the commercially available Chinese ISO standard sand. Table 1 shows the chemical components of RM, DG, FA and cement.

Table 1, the porous mineral materials of 1% and 3% of the desulfurized gypsum were added to test the bonding properties of the gypsum board. The results are shown in Table 2.

Abstract: To resolve problems caused by the accumulation of flue gas desulfurization gypsum (FGDG) in the environment, a polymer material was prepared using FGDG, …

Saline-sodic soil colloids contain a large number of exchangeable sodium ions,leading to soil aggregates breakdown,clay dispersion and soil pores blocking.Saline-sodic soils improvement requires two processes,providing calcium source to exchange with sodium on soil surface and removing salt through leaching or drainage.In this study,we used corn …

Desulfurization-gypsum-based composite cementitious materials were prepared by adding certain proportions of sulfoaluminate cement, mineral powder quick …

According to the standardized leaching test No. 13, gypsum containing mercury is mixed with distilled water at 1:10 mixing ratio and shaken at 250 rpm for 6 h at room temperature. ... Production and resource utilization of flue gas desulfurized gypsum in China - A review. Environ Pollut, 288 (2021), Article 117799, …

To investigate the macroscopic mechanical properties and failure evolution mechanism of desulfurization gypsum–fly ash fluid lightweight soil, a microscale numerical model using PFC2D (Particle Flow Code) was constructed. Uniaxial compression tests were conducted to determine the microscopic parameters of the model, extracting information …

Flue Gas Desulphurized Gypsum (FGDG) is a by-product generated by the thermal power industry to remove sulfur dioxide (SO 2) from flue gas emissions. This …

Leiva et al. (2010) used the desulfurization gypsum to produce fire resistant panels, and tested its different physico-chemical, mechanical, fire resistance and environment properties (leaching and radioactivity) and compared the test results with European commercial gypsum standards. The results showed that the physico …

With steel slag and desulfurized gypsum as main raw material,mixed appropriate amount slag and compound addition a little of activator,and based on orthogonal test,we explored the slag dosage,the proportion of the combined admixture activator and the desulfurized gypsum dosage impact on the performance of clinker-free cementing material,such as …

The results show that adding desulfurized gypsum, which accounts for 6% to 8% of the total mass of the cementitious material, has no adverse effect on the …

This material is known as FGD (flue gas desulfurized) gypsum and is being marketed as Gypsoil TM. Gypsum or calcium sulfate dihydrate (CaSO 4 ·2H 2 O) in its purest form has 23 % Ca and 18 % S, although most agricultural sources have slightly lower analyses. Calcium fertilization is unnecessary for field crops grown on Wisconsin …

Since many independent factors can affect the property of geopolymer, it is of great significance to seek optimization technologies to maximize the recovery and utilization of solid waste resources. In this work, a cementitious material was prepared using ground granulated blast furnace slag (GGBS), carbide slag (CS) and desulfurized …

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 ...

In this sense, silage (SG) and flue gas desulfurized gypsum (FGDG) are two good choices as composting additives. SG is made from the roughage obtained by cutting corn, sorghum, and other forage crops and grass; the roughage is then subjected to anaerobic fermentation by lactic acid bacteria, which results in the generation of SG [19].

Flue Gas Desulphurized Gypsum (FGDG) is a by-product generated by the thermal power industry to remove sulfur dioxide (SO 2) from flue gas emissions.This paper provides a comprehensive review of flue gas desulphurized (FGD) gypsum production, property, and applications in the construction industry.

The results show that ad ding desulfurized gypsum, ... 1:1.2.The 28days final material strength was 2.0 MPa,which achives the technical specification requirements.Through the test of SEM, XRD and ...

DOI: 10.1016/j.conbuildmat.2023.131840 Corpus ID: 258997305; Effects of hybrid fibers on properties of desulfurized gypsum-based composite cementitious materials @article{Lv2023EffectsOH, title={Effects of hybrid fibers on properties of desulfurized gypsum-based composite cementitious materials}, author={Fangtao Lv …

The leaching test of the HMs present in FGD gypsum samples was done following the US EPA SPLP standard to extract the acid-soluble fraction (USEPA, Method 1312, 1994) and European Standard ...

The incorporation of desulfurized gypsum, fly ash, and hydrated lime within raw soil materials significantly enhances compressive strength and water resistance. ...

The test results show that sodium sulfate has a poor improvement effect on the sample due to the presence of desulfurized building gypsum in the composite cementing system, while calcium chloride and calcium formate can effectively promote the hydration of the cement in the composite cementing system, significantly improving the …

Flue gas desulfurized gypsum (FGD gypsum), mainly originates from thermal power plants, smelters, and large-scale enterprise boilers. This article reviews the production in China and the latest beneficial utilizations of FGD gypsum. China is a large coal-consuming country and has always had serious SO 2 emissions. Therefore, the …

Chloride ion has an important influence on the performance of gypsum board prepared by desulfurization gypsum, especially in wet environment. Therefore, …

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 ...

Citric acid, sodium gluconate, and sodium tripolyphosphate were used to design and prepare a desulfurized gypsum paste containing single or combined …