Coal fly ash

Singh, Mandeep; Siddique, Rafat; Singh, Jagdeep

doi:10.1016/b978-0-12-824050-2.00012-7

Cited by 6 publications

(2 citation statements)

References 80 publications

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“…It is well known that fly ash is a pozzolanic material that reacts with calcium hydroxide during hydration of cement to form additional cementitious compounds [53]. However, excessive amount of fly ash in the cementitious composites cannot fully participate in the pozzolanic reaction, thus resulting in a reduction of hydration products in cementbased composites.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Green Sustainable Cement Paste Mixture Based on Inorganic Additives: An Experimental and Modelling Approach

Mahmood,

Pechočiaková,

Noman

et al. 2024

Buildings

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Using waste materials in the mixture of building materials is an approach aligned with the circular economy, a viewpoint that creates sustainable building industries, especially in developed countries. This study concentrated on the application of laponite (LAP), fly ash (FA), and bentonite (BENT) materials in the mixture of cement pastes. The first step used experimental practices to examine the metrics of toughness, three-point bending, and compressive strength with different percentages of added LAP, FA, and BENT after the characterization of samples by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The next step entailed assessment of cement paste specifications through some regressive equations obtained by the application of 2D curve fitting and sensitive analysis of additive (FA, LAP, and BENT) fluctuations in the structure of cement paste. The results show that linear polynomial equations are the best for the evaluation of cement paste terms as per different percentages of the additives. The environmental impact assessment (EIA) of nine prepared samples demonstrated that LAP created the safest condition in comparison to others. However, the ordered weighted averaging (OWA) computations applied for the sustainability assessment (SA) of the samples showed that the LAP is the most appropriate option for use in the structure of cement paste. Using experimental analysis and mathematical modeling, the behavior of cement paste interacting with mineral additives is evaluated. Sustainable mixtures are then presented based on EIA.

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Section: Resultsmentioning

confidence: 99%

Preparation of Green Sustainable Cement Paste Mixture Based on Inorganic Additives: An Experimental and Modelling Approach

Mahmood,

Pechočiaková,

Noman

et al. 2024

Buildings

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“…When burning solid fuel, a large amount of ash and slag waste is generated, the storage of which in ash dumps is a source of soil and groundwater pollution [ 1 , 2 , 3 ] and leads to an annually increasing level of environmental pollution threat. In this regard, the issues of the most efficient use of stored ash and slag waste as secondary resources are relevant today [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

The Use of Aluminosilicate Ash Microspheres from Waste Ash and Slag Mixtures in Gypsum-Lime Compositions

et al. 2023

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The article considered the issues of the modification of gypsum stone to improve its performance properties. The influence of mineral additives on the physical and mechanical characteristics of the modified gypsum composition is described. The composition of the gypsum mixture included slaked lime and an aluminosilicate additive in the form of ash microspheres. It was isolated from ash and slag waste from fuel power plants as a result of their enrichment. This made it possible to reduce the carbon content in the additive to 3%. Modified compositions of the gypsum composition are proposed. The binder was replaced with an aluminosilicate microsphere. Hydrated lime was used to activate it. Its content varied: 0, 2, 4, 6, 8 and 10% of the weight of the gypsum binder. Replacing the binder with an aluminosilicate product for the enrichment of ash and slag mixtures made it possible to improve the structure of the stone and increase its operational properties. The compressive strength of the gypsum stone was 9 MPa. This is more than 100% higher than the strength of the control composition of gypsum stone. Studies have confirmed the effectiveness of using an aluminosilicate additive—a product of enrichment of ash and slag mixtures. The use of an aluminosilicate component for the production of modified gypsum mixtures allows the saving of gypsum resources. Developed formulations of gypsum compositions using aluminosilicate microspheres and chemical additives provide the specified performance properties. This makes it possible to use them in the production of self-leveling floors, plastering and puttying works. Replacing traditional compositions with a new composition based on waste has a positive effect on the preservation of the natural environment and contributes to the formation of comfortable conditions for human habitation.

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Scatter of Coal Fly Ash Properties and Effect of Particle Size and Shape on Fresh and Hardened Mortar Performance

Tandon

Stengel

2023

Lecture Notes in Civil Engineering

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Coal fly ash

Cited by 6 publications

References 80 publications

Preparation of Green Sustainable Cement Paste Mixture Based on Inorganic Additives: An Experimental and Modelling Approach

Preparation of Green Sustainable Cement Paste Mixture Based on Inorganic Additives: An Experimental and Modelling Approach

The Use of Aluminosilicate Ash Microspheres from Waste Ash and Slag Mixtures in Gypsum-Lime Compositions

Scatter of Coal Fly Ash Properties and Effect of Particle Size and Shape on Fresh and Hardened Mortar Performance

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