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Chloride binding and time-dependent surface chloride content models for fly ash concrete

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Abstract

Corrosion of embedded rebars is a classical deterioration mechanism of reinforced concrete structures exposed to chloride environments. Such environments can be attributed to the presence of seawater, deicing or sea-salts, which have high concentrations of chloride ion. Chloride ingress into concrete, essential for inducing rebar corrosion, is a complex interaction between many physical and chemical processes. The current study proposes two chloride ingress parameter models for fly ash concrete, namely: 1) surface chloride content under tidal exposure condition; and 2) chloride binding. First, inconsistencies in surface chloride content and chloride binding models reported in literature, due to them not being in line with past research studies, are pointed out. Secondly, to avoid such inconsistencies, surface chloride content and chloride binding models for fly ash concrete are proposed based upon the experimental work done by other researchers. It is observed that, proposed models are simple, consistent and in line with past research studies reported in literature.

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Authors and Affiliations

  1. Department of Civil Engineering, SSN College of Engineering, Kalavakkam, 603 110, India

    S. Muthulingam

  2. Structural Engineering Division, Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, 600 036, India

    B. N. Rao

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  1. S. Muthulingam
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  2. B. N. Rao
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Correspondence to B. N. Rao.

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Muthulingam, S., Rao, B.N. Chloride binding and time-dependent surface chloride content models for fly ash concrete. Front. Struct. Civ. Eng. 10, 112–120 (2016). https://doi.org/10.1007/s11709-015-0322-x

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  • DOI: https://doi.org/10.1007/s11709-015-0322-x

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