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    Rusting of Metallic Surface Hardeners: Case History

    Source: Journal of Performance of Constructed Facilities:;2000:;Volume ( 014 ):;issue: 001
    Author:
    Noel P. Mailvaganam
    ,
    Jim Margeson
    DOI: 10.1061/(ASCE)0887-3828(2000)14:1(5)
    Publisher: American Society of Civil Engineers
    Abstract: Sprinkled surface hardeners are incorporated into freshly placed concrete slabs while high-strength overlays are placed on a previously poured new concrete slab or an existing deteriorated slab, providing improved abrasion and impact resistance. Metal filings are combined with cement corrosion inhibitors and water-reducing admixtures. Depending on the intended application, the metallic particles may either be treated with chemicals or directly sieved and graded. Rusting of metallic surface hardeners can occur when the installation of these products or the conditions during installation are not closely controlled. Visual tests, including microscopy and chemical analysis, were employed to investigate some of the potential factors that contribute to the rusting problem. Observations and possible causes contributing to the rusting and debonding problems are identified: (1) a decrease in the alkalinity of the cement paste due to carbonation; (2) exposure of unprotected metallic particles to air during the brushing procedure; and (3) timing of the finishing operations.
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      Rusting of Metallic Surface Hardeners: Case History

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/44207
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    • Journal of Performance of Constructed Facilities

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    contributor authorNoel P. Mailvaganam
    contributor authorJim Margeson
    date accessioned2017-05-08T21:14:54Z
    date available2017-05-08T21:14:54Z
    date copyrightFebruary 2000
    date issued2000
    identifier other%28asce%290887-3828%282000%2914%3A1%285%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/44207
    description abstractSprinkled surface hardeners are incorporated into freshly placed concrete slabs while high-strength overlays are placed on a previously poured new concrete slab or an existing deteriorated slab, providing improved abrasion and impact resistance. Metal filings are combined with cement corrosion inhibitors and water-reducing admixtures. Depending on the intended application, the metallic particles may either be treated with chemicals or directly sieved and graded. Rusting of metallic surface hardeners can occur when the installation of these products or the conditions during installation are not closely controlled. Visual tests, including microscopy and chemical analysis, were employed to investigate some of the potential factors that contribute to the rusting problem. Observations and possible causes contributing to the rusting and debonding problems are identified: (1) a decrease in the alkalinity of the cement paste due to carbonation; (2) exposure of unprotected metallic particles to air during the brushing procedure; and (3) timing of the finishing operations.
    publisherAmerican Society of Civil Engineers
    titleRusting of Metallic Surface Hardeners: Case History
    typeJournal Paper
    journal volume14
    journal issue1
    journal titleJournal of Performance of Constructed Facilities
    identifier doi10.1061/(ASCE)0887-3828(2000)14:1(5)
    treeJournal of Performance of Constructed Facilities:;2000:;Volume ( 014 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian