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, 43:115 | Cite as

Influence of chloride threshold value in service life prediction of reinforced concrete structures

  • S Mahima
  • P V P Moorthi
  • A Bahurudeen
  • Athira Gopinath
Article
  • 44 Downloads

Abstract

Extensive studies have been reported on the development of service-life prediction of reinforced concrete structures in the last two decades. Service life of a reinforced concrete structure is dependent on the corrosion process, specifically chloride threshold value. Chloride threshold value is a distinctive property and is dependent on several factors such as the supplementary cementitious material used, presence of surface cracks, water to binder ratio, type of steel reinforcement, exposure conditions, measurement methods, etc. Although chloride threshold value is an influential parameter in service-life prediction, a definitive chloride threshold value considering these factors is not reported in the existing literature and standards. Moreover, values adopted in many analytical tools for service life predictions based on the type of steel reinforcement alone are not appropriate and leads to inaccurate calculations. There is a gap in the available literature in understanding the selection of suitable chloride threshold values to be adopted for a specific system. Therefore, it is imperative to study the variation of chloride threshold value with exposure conditions as well as other influencing parameters, to achieve proper service life prediction. In the paper, several influencing parameters on chloride threshold value and its significance on prediction method are comprehensively reviewed. Moreover, suitable recommendations are highlighted for Indian and international standards at the later part of the study.

Keywords

Durability corrosion service life concrete chloride threshold value supplementary cementitious materials 

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Copyright information

© Indian Academy of Sciences 2018

Authors and Affiliations

  • S Mahima
    • 1
  • P V P Moorthi
    • 2
  • A Bahurudeen
    • 3
  • Athira Gopinath
    • 3
  1. 1.Department of Civil EngineeringIndian Institute of TechnologyKanpurIndia
  2. 2.Department of Civil EngineeringIndian Institute of TechnologyBombayIndia
  3. 3.Department of Civil EngineeringBirla Institute of Technology and SciencePilaniIndia

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