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    Cast-Concrete Products Made with FBC Ash and Wet-Collected Coal-Ash

    Source: Journal of Materials in Civil Engineering:;2005:;Volume ( 017 ):;issue: 006
    Author:
    Tarun R. Naik
    ,
    Rudolph N. Kraus
    ,
    Yoon-moon Chun
    ,
    Francois D. Botha
    DOI: 10.1061/(ASCE)0899-1561(2005)17:6(659)
    Publisher: American Society of Civil Engineers
    Abstract: Cast-concrete hollow blocks, solid blocks, and paving stones were produced at a manufacturing plant by replacing up to 45% (by mass) of portland cement with fluidized bed combustion (FBC) coal ash and up to 9% of natural aggregates with wet-collected, low-lime, coarse coal-ash (WA). Cast-concrete product specimens of all three types exceeded the compressive strength requirements of ASTM from early ages, with the exception of one paving-stone mixture, which fell short of the requirement by less than 10%. The cast-concrete products made by replacing up to 40% of cement with FBC ash were equivalent in strength (89–113% of control) to the products without ash. The abrasion resistance of paving stones was equivalent for up to 34% FBC ash content. Partial replacement of aggregates with WA decreased strength of the products. The resistance of hollow blocks and paving stones to freezing and thawing decreased appreciably with increasing ash contents. The cast-concrete products could be used indoors in regions where freezing and thawing is a concern, and outdoors in a moderate climate.
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      Cast-Concrete Products Made with FBC Ash and Wet-Collected Coal-Ash

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    http://yetl.yabesh.ir/yetl1/handle/yetl/46081
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    contributor authorTarun R. Naik
    contributor authorRudolph N. Kraus
    contributor authorYoon-moon Chun
    contributor authorFrancois D. Botha
    date accessioned2017-05-08T21:17:55Z
    date available2017-05-08T21:17:55Z
    date copyrightDecember 2005
    date issued2005
    identifier other%28asce%290899-1561%282005%2917%3A6%28659%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/46081
    description abstractCast-concrete hollow blocks, solid blocks, and paving stones were produced at a manufacturing plant by replacing up to 45% (by mass) of portland cement with fluidized bed combustion (FBC) coal ash and up to 9% of natural aggregates with wet-collected, low-lime, coarse coal-ash (WA). Cast-concrete product specimens of all three types exceeded the compressive strength requirements of ASTM from early ages, with the exception of one paving-stone mixture, which fell short of the requirement by less than 10%. The cast-concrete products made by replacing up to 40% of cement with FBC ash were equivalent in strength (89–113% of control) to the products without ash. The abrasion resistance of paving stones was equivalent for up to 34% FBC ash content. Partial replacement of aggregates with WA decreased strength of the products. The resistance of hollow blocks and paving stones to freezing and thawing decreased appreciably with increasing ash contents. The cast-concrete products could be used indoors in regions where freezing and thawing is a concern, and outdoors in a moderate climate.
    publisherAmerican Society of Civil Engineers
    titleCast-Concrete Products Made with FBC Ash and Wet-Collected Coal-Ash
    typeJournal Paper
    journal volume17
    journal issue6
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)0899-1561(2005)17:6(659)
    treeJournal of Materials in Civil Engineering:;2005:;Volume ( 017 ):;issue: 006
    contenttypeFulltext
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