Effect of mechanical grinding on physical and chemical characteristics of circulating fluidized bed fly ash from coal gangue power plant

Zhao, Jihui; Wang, Dongmin; Liao, Shucong

doi:10.1016/j.conbuildmat.2015.10.144

Cited by 77 publications

(27 citation statements)

References 25 publications

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“…after the grinding process, particles of the original bottom ash become finer and gap between the particles gets reduced. Moreover, particle weight per unit volume improves which tends to increase the specific gravity and bulk density of the grounded bottom ash [13,[23][24]. The specific gravity of grounded bottom samples S-I′, S-II′, S-III′ and S-IV′ were found as 2. structures.…”

Section: Physical and Chemical Characterization Of Original And Grounmentioning

confidence: 99%

“…after grinding, the surface structure, dispersion and uniformity between the particles improve. in the regular shaped grounded bottom ash, reduced gap between the particles control interconnected pores which tend to decrease the porosity and water holding capacity [13,[23][24][25][26][27][28]. The WHC and porosity of the grounded bottom ash varies from 34.74-36.23 and 38.02-41.60 respectively.…”

Section: Physical and Chemical Characterization Of Original And Grounmentioning

confidence: 99%

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Comprehensive Characterization of Grounded Bottom Ash from Indian Thermal Power Plant

Singh¹,

Kumar²,

Kumar³

2017

JRST

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In present work, an attempt has been made to improve the quality of bottom ash for utilization as a pozzolanic material. All samples were crushed and passed through 250 µm sieve to prepare grounded bottom ash. The physio-chemical, mineral and leaching characteristics of original and grounded bottom ash were studied. Results show that specific gravity and bulk density of all sample increases whereas porosity, water holding capacity and loss of ignition decreases after the grounding the bottom ash. Pozzolanic properties of bottom ash also improved after grounding the ash samples which helps to commercialize its utilization and reduce environmental impact.

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Section: Physical and Chemical Characterization Of Original And Grounmentioning

confidence: 99%

Section: Physical and Chemical Characterization Of Original And Grounmentioning

confidence: 99%

Comprehensive Characterization of Grounded Bottom Ash from Indian Thermal Power Plant

Singh¹,

Kumar²,

Kumar³

2017

JRST

View full text Add to dashboard Cite

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“…They can have pozzolanic (Li et al, 2012;Sata et al, 2007) or hydraulic (Ohenoja et al, 2016b;Rissanen et al, 2017;Zhao et al, 2015) properties so they react with cement and water. Typically, the particle shape of FBCFA irregular (Chindaprasirt et al, 2011;Li et al, 2012;Ohenoja et al, 2016a;Zhao et al, 2015) compared to the spherical particles of PCC fly ash (Li et al, 2012;Zhao et al, 2015). In addition, there is much variation in chemical composition between different ashes, such as in the case of FBCFAs (Gulyurtlu et al, 2013c;Ohenoja et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Fly ash from fluidized bed combustion of peat and wood as a cement replacement material

Rissanen¹,

Ohenoja²,

Marcellini³

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

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Fly ash from fluidized bed combustion of peat and wood is a promising material for partial cement replacement. Experiments conducted on mortars in which 20% of the cement was replaced with fluidized bed combustion fly ash (FBCFA) revealed that 28-day compressive strength can be almost as high as for reference samples in which cement was not replaced is possible to reach. FBCFA in cement can also produce higher compressive strength as coal fly ash and significantly higher strength than limestone filler. FBCFA can decrease the workability of fresh mortar due to its highly irregular particle shape, however, if ash is milled, it could be used even without an additional superplasticizer. The effect of FBCFA on chemical durability and sulfate attack resistance of mortar did not differ significantly from those of coal fly ash and limestone filler.

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“…It is estimated that global coal consumption will increase by more than 50%, as compared with 97% in developing countries, by 2030 [1,2]. Circulating fluidized bed combustion (CFBC) technology is an environmentally friendly, efficient, and clean coal-fired technology, which can use common bituminous coal, anthracite, lignite, peat, and coal gangue as fuels [3][4][5][6]. CFBC was popularized rapidly in the last two decades.…”

Section: Introductionmentioning

confidence: 99%

“…ey concluded that the expansibility is closely related to the content of SO 3 (usually anhydrite) and f-CaO, and mechanical grinding and chemical activation can increase CFBC desulfurized slag's strength. However, CFBC desulfurization slags from different regions or di erent types of coals have di erent chemical composition content, which results in signi cant disparities in activity and expansibility.…”

Section: Introductionmentioning

confidence: 99%

Research on the Expansion Characteristics and Compressive Strength of Mortars Containing Circulating Fluidized Bed Combustion Desulfurization Slag

Cheng

Hou

Han

et al. 2018

Advances in Materials Science and Engineering

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Circulating fluidized bed combustion (CFBC) desulfurization slag is a waste residue discharged from coal power plants. In this article, expansion characteristics and compressive strength of mortars containing CFBC desulfurization slag were evaluated, subjected to mechanical grinding time, the amount of additive, and chemical activation. Correlations between the linear expansion rate and compressive strength were investigated. e hydration products of cement-slag cementitious system were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). e results show that mechanical grinding can increase both the expansion and compressive strength of mortars containing CFBC desulfurization slag, and the compressive strength and linear expansion can develop in coordination. While increasing the amount of the fine desulfurization slag, the linear expansion rate increases, and the compressive strength reaches to the maximum when the amount is 30%. Moderate sodium sulfate as an activator can both promote the compressive strength and increase the expansion of mortars.

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Effect of mechanical grinding on physical and chemical characteristics of circulating fluidized bed fly ash from coal gangue power plant

Cited by 77 publications

References 25 publications

Comprehensive Characterization of Grounded Bottom Ash from Indian Thermal Power Plant

Comprehensive Characterization of Grounded Bottom Ash from Indian Thermal Power Plant

Fly ash from fluidized bed combustion of peat and wood as a cement replacement material

Research on the Expansion Characteristics and Compressive Strength of Mortars Containing Circulating Fluidized Bed Combustion Desulfurization Slag

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