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    Volume 5, Issue 1

    Role of Rice Husk Ash and Water Extracted From Manioc in the Formation of Passive Film on Steel Reinforcement in Concrete

    (Received 8 December 2015; accepted 8 July 2016)

    CODEN: ACEMF9

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    Abstract

    Corrosive behavior in reinforced concrete specimens containing two agricultural byproducts, rice husk ash, and water extracted from manioc, called mandioca brava in Brazil, was investigated by accelerated corrosion tests in a modified immersion assay. The rice husk ash and mandioca brava were characterized by infrared analysis and X-ray diffraction technics. The carboxylate and silanol functional groups were detected in these agricultural byproducts and these functional groups were proposed here as a main cause of inhibition of the accelerated corrosion that occurred during a modified immersion assay. The mass loss from steel bars in concrete specimens after accelerated corrosion tests confirm the synergistic effect of rice husk ash and mandioca brava when used together in a concrete mixture against the corrosion. Anodic polarization measurements of CA-50 steel bars in simulated pore solutions indicated that the presence of these agricultural byproducts offered anticorrosive protection.


    Author Information:

    Trindade, E. C.
    Grupo de Mecânica Aplicada, Programa de Pós-Graduação em Engenharia, Universidade Federal do Pampa, Ibirapuitã CEPAlegrete – RS –,

    Pio, E. S.
    Grupo de Mecânica Aplicada, Programa de Pós-Graduação em Engenharia, Universidade Federal do Pampa, Ibirapuitã CEPAlegrete – RS –,

    Silva, T. M. V.
    Grupo de Mecânica Aplicada, Programa de Pós-Graduação em Engenharia, Universidade Federal do Pampa, Ibirapuitã CEPAlegrete – RS –,

    Faour, E. C.
    Grupo de Mecânica Aplicada, Programa de Pós-Graduação em Engenharia, Universidade Federal do Pampa, Ibirapuitã CEPAlegrete – RS –,

    Spengler, R. L.
    Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre – RS–,

    Grosser, F. N.
    Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre – RS–,

    Schmidt, A. M.
    Universidade Federal do Pampa, Caçapava do Sul - RS,

    Tamborim, S. M.
    Grupo de Mecânica Aplicada, Programa de Pós-Graduação em Engenharia, Universidade Federal do Pampa, Ibirapuitã CEPAlegrete – RS –,

    Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre,


    Stock #: ACEM20150038

    ISSN:2165-3984

    DOI: 10.1520/ACEM20150038

    Author
    Title Role of Rice Husk Ash and Water Extracted From Manioc in the Formation of Passive Film on Steel Reinforcement in Concrete
    Symposium ,
    Committee A01