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    Effects of Fineness Modulus Variation in Preheated Sand on Geopolymer Material Properties

    Source: Practice Periodical on Structural Design and Construction:;2024:;Volume ( 029 ):;issue: 003::page 04024038-1
    Author:
    Mohammad Rizwan Bhina
    ,
    Kuang-Yen Liu
    ,
    John-Eric Hsin Yu Hu
    ,
    Chih-Ta Tsai
    DOI: 10.1061/PPSCFX.SCENG-1457
    Publisher: American Society of Civil Engineers
    Abstract: The fineness modulus (FM) denotes the average particle size of fine aggregates. The FM of the sand, and other constituent qualities, have a major effect on the strength and durability of geopolymer mortar. Finer particle size increases the surface area, influencing heat absorption and emission, impacting the mechanical strength of geopolymer concrete. Heat energy notably accelerates reaction kinetics, accelerate geopolymerization processes. The purpose of this study is to ascertain how the compressive strength (CS) of fly ash (FA) and Ground granulated blast-furnace slag (Slag) based geopolymer material (GPM) is affected by the fineness modulus (FM) of sand that has been heated to 100°C±5°C. To make the paste for the geopolymer material, natural river sands with FM of 1.85, 2.41, 2.79, and 3.32 were used. For the investigation, 36 samples of a 50×50×50  mm3 cube were hot cured at 50°C for 3 h to determine the CS of GPM paste after 3 h, 1 day, and 7 days. The study’s conclusions show that sand FM has a large effect on the flow rate (%) of GPM. In particular, a greater flow rate (%) of GPM paste was connected to a higher sand FM. Notably, the most pronounced improvements in CS growth rate (%) were seen in GPM paste made with heated sand that had FM values of 1.85 (fine sand) and 2.79 (medium sand). Furthermore, when heated sand was utilized, the FM had a substantial impact on the CS of GPM matrix. The mineral composition, including unreacted FA and Slag components, underwent assessment using energy dispersive X-Ray analysis (EDX) and scanning electron microscopy (SEM). These analyses revealed that fine aggregates, with increased surface area content, contributed to higher concrete strength compared with those with a higher concentration of coarse aggregates. It follows that when attempting to create geopolymer material with strong early-strength qualities, fine sand, well graded sand ideal match to the ASTM upper and lower bound limits are the best options for fine aggregates.
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      Effects of Fineness Modulus Variation in Preheated Sand on Geopolymer Material Properties

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    contributor authorMohammad Rizwan Bhina
    contributor authorKuang-Yen Liu
    contributor authorJohn-Eric Hsin Yu Hu
    contributor authorChih-Ta Tsai
    date accessioned2024-12-24T10:11:12Z
    date available2024-12-24T10:11:12Z
    date copyright8/1/2024 12:00:00 AM
    date issued2024
    identifier otherPPSCFX.SCENG-1457.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4298453
    description abstractThe fineness modulus (FM) denotes the average particle size of fine aggregates. The FM of the sand, and other constituent qualities, have a major effect on the strength and durability of geopolymer mortar. Finer particle size increases the surface area, influencing heat absorption and emission, impacting the mechanical strength of geopolymer concrete. Heat energy notably accelerates reaction kinetics, accelerate geopolymerization processes. The purpose of this study is to ascertain how the compressive strength (CS) of fly ash (FA) and Ground granulated blast-furnace slag (Slag) based geopolymer material (GPM) is affected by the fineness modulus (FM) of sand that has been heated to 100°C±5°C. To make the paste for the geopolymer material, natural river sands with FM of 1.85, 2.41, 2.79, and 3.32 were used. For the investigation, 36 samples of a 50×50×50  mm3 cube were hot cured at 50°C for 3 h to determine the CS of GPM paste after 3 h, 1 day, and 7 days. The study’s conclusions show that sand FM has a large effect on the flow rate (%) of GPM. In particular, a greater flow rate (%) of GPM paste was connected to a higher sand FM. Notably, the most pronounced improvements in CS growth rate (%) were seen in GPM paste made with heated sand that had FM values of 1.85 (fine sand) and 2.79 (medium sand). Furthermore, when heated sand was utilized, the FM had a substantial impact on the CS of GPM matrix. The mineral composition, including unreacted FA and Slag components, underwent assessment using energy dispersive X-Ray analysis (EDX) and scanning electron microscopy (SEM). These analyses revealed that fine aggregates, with increased surface area content, contributed to higher concrete strength compared with those with a higher concentration of coarse aggregates. It follows that when attempting to create geopolymer material with strong early-strength qualities, fine sand, well graded sand ideal match to the ASTM upper and lower bound limits are the best options for fine aggregates.
    publisherAmerican Society of Civil Engineers
    titleEffects of Fineness Modulus Variation in Preheated Sand on Geopolymer Material Properties
    typeJournal Article
    journal volume29
    journal issue3
    journal titlePractice Periodical on Structural Design and Construction
    identifier doi10.1061/PPSCFX.SCENG-1457
    journal fristpage04024038-1
    journal lastpage04024038-13
    page13
    treePractice Periodical on Structural Design and Construction:;2024:;Volume ( 029 ):;issue: 003
    contenttypeFulltext
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