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    Impact of Alkali Silica Reaction on Fly Ash-Based Geopolymer Concrete

    Source: Journal of Materials in Civil Engineering:;2013:;Volume ( 025 ):;issue: 001
    Author:
    Kunal Kupwade-Patil
    ,
    Erez N. Allouche
    DOI: 10.1061/(ASCE)MT.1943-5533.0000579
    Publisher: American Society of Civil Engineers
    Abstract: This study reports the findings of an experimental investigation for alkali silica reaction (ASR) between reactive aggregates and the geopolymer matrix. Specimens were prepared using one Class C and two Class F fly ash stockpiles. Mechanical testing included potential reactivity of the aggregates via length change and compression test measurements, as per ASTM standards. Results suggest that the extent of ASR reaction due to the presence of reactive aggregates in fly ash-based geopolymer concretes is substantially lower than in the case of ordinary portland cement-based concrete, and well below the ASTM specified threshold. Furthermore, geopolymer concrete specimens appeared to undergo a densification process in the presence of alkali solutions, resulting in reduced permeability and increased mechanical strength. Utilizing ASR-vulnerable aggregates in the production of geopolymer concrete products could contribute to the economic appeal and sustainability of geopolymer binders in regions that suffer from insufficient local supply of high quality aggregates.
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      Impact of Alkali Silica Reaction on Fly Ash-Based Geopolymer Concrete

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    contributor authorKunal Kupwade-Patil
    contributor authorErez N. Allouche
    date accessioned2017-05-08T21:56:04Z
    date available2017-05-08T21:56:04Z
    date copyrightJanuary 2013
    date issued2013
    identifier other%28asce%29mt%2E1943-5533%2E0000613.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/66964
    description abstractThis study reports the findings of an experimental investigation for alkali silica reaction (ASR) between reactive aggregates and the geopolymer matrix. Specimens were prepared using one Class C and two Class F fly ash stockpiles. Mechanical testing included potential reactivity of the aggregates via length change and compression test measurements, as per ASTM standards. Results suggest that the extent of ASR reaction due to the presence of reactive aggregates in fly ash-based geopolymer concretes is substantially lower than in the case of ordinary portland cement-based concrete, and well below the ASTM specified threshold. Furthermore, geopolymer concrete specimens appeared to undergo a densification process in the presence of alkali solutions, resulting in reduced permeability and increased mechanical strength. Utilizing ASR-vulnerable aggregates in the production of geopolymer concrete products could contribute to the economic appeal and sustainability of geopolymer binders in regions that suffer from insufficient local supply of high quality aggregates.
    publisherAmerican Society of Civil Engineers
    titleImpact of Alkali Silica Reaction on Fly Ash-Based Geopolymer Concrete
    typeJournal Paper
    journal volume25
    journal issue1
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0000579
    treeJournal of Materials in Civil Engineering:;2013:;Volume ( 025 ):;issue: 001
    contenttypeFulltext
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