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    Enhancing Mechanical Characteristics of Fly Ash and Fly Ash–Stone Dust Using Geopolymerization Technique

    Source: Journal of Hazardous, Toxic, and Radioactive Waste:;2025:;Volume ( 029 ):;issue: 002::page 04025001-1
    Author:
    Uday Shankar Yadav
    ,
    Arvind Kumar Jha
    DOI: 10.1061/JHTRBP.HZENG-1416
    Publisher: American Society of Civil Engineers
    Abstract: Geopolymer, an inorganic aluminosilicate polymer, is considered a sustainable construction material. However, a notable research gap still persists in minimizing the use of alkali activators and calcium-based additives by using suitable industrial byproducts such as fly ash and stone dust. The present study aimed to optimize various geopolymerization parameters (concentration of solutions, temperature, and curing period), explore the strength and durability of geopolymer-based materials, and find out the mechanisms by conducting microlevel investigations and physicochemical analyses. The results reveal that geopolymer ratios of 1:0.25 and temperature of 100°C are found to be optimum based on compressive strength for fly ash and stone dust and their combinations. The samples subjected to freeze–thaw (F-T) cycles reveal only a minor loss in compressive strength (i.e., 4%–6%) for all compositions, demonstrating the resilience of geopolymer building materials even in adverse environmental circumstances. Further, the longevity potential of the optimized compositions is evaluated at different curing periods. Additionally, microlevel investigations (X-ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, and mercury intrusion porosimetry) confirm the formation mechanism of reaction products and microstructural changes. Further, the potential of hydrogen and electrical conductivity values assess the physicochemical properties for understanding their effect on geopolymer reactions and the mechanical behavior of compositions.
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      Enhancing Mechanical Characteristics of Fly Ash and Fly Ash–Stone Dust Using Geopolymerization Technique

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4304485
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    contributor authorUday Shankar Yadav
    contributor authorArvind Kumar Jha
    date accessioned2025-04-20T10:19:48Z
    date available2025-04-20T10:19:48Z
    date copyright1/3/2025 12:00:00 AM
    date issued2025
    identifier otherJHTRBP.HZENG-1416.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4304485
    description abstractGeopolymer, an inorganic aluminosilicate polymer, is considered a sustainable construction material. However, a notable research gap still persists in minimizing the use of alkali activators and calcium-based additives by using suitable industrial byproducts such as fly ash and stone dust. The present study aimed to optimize various geopolymerization parameters (concentration of solutions, temperature, and curing period), explore the strength and durability of geopolymer-based materials, and find out the mechanisms by conducting microlevel investigations and physicochemical analyses. The results reveal that geopolymer ratios of 1:0.25 and temperature of 100°C are found to be optimum based on compressive strength for fly ash and stone dust and their combinations. The samples subjected to freeze–thaw (F-T) cycles reveal only a minor loss in compressive strength (i.e., 4%–6%) for all compositions, demonstrating the resilience of geopolymer building materials even in adverse environmental circumstances. Further, the longevity potential of the optimized compositions is evaluated at different curing periods. Additionally, microlevel investigations (X-ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, and mercury intrusion porosimetry) confirm the formation mechanism of reaction products and microstructural changes. Further, the potential of hydrogen and electrical conductivity values assess the physicochemical properties for understanding their effect on geopolymer reactions and the mechanical behavior of compositions.
    publisherAmerican Society of Civil Engineers
    titleEnhancing Mechanical Characteristics of Fly Ash and Fly Ash–Stone Dust Using Geopolymerization Technique
    typeJournal Article
    journal volume29
    journal issue2
    journal titleJournal of Hazardous, Toxic, and Radioactive Waste
    identifier doi10.1061/JHTRBP.HZENG-1416
    journal fristpage04025001-1
    journal lastpage04025001-14
    page14
    treeJournal of Hazardous, Toxic, and Radioactive Waste:;2025:;Volume ( 029 ):;issue: 002
    contenttypeFulltext
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