Analysis of naturally-generated corrosion products due to chlorides in 20-year old reinforced concrete: An elastic modulus-mineralogy characterization

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Abstract

The elastic modulus of corrosion product (Ecp) has been reported with significant variations in the literature. This study aims to investigate the Ecp of naturally-generated chloride-induced corrosion products formed in different concrete mixes. Microstructural characterization was conducted through nano-indentation, electron microscopy and Raman spectroscopy. The corrosion products were mainly composed of a goethite matrix with portions of maghemite, independently of the concrete composition. Microscopic analysis suggest that layers of corrosion products grow at different times and under different physico-chemical conditions. Our measurements showed that Ecp varied between 80−100 GPa, which can be suggested for numerical models of corrosion induced cracking.

Original languageEnglish
Article number109356
Pages (from-to)1-13
Number of pages13
JournalCorrosion Science
Volume184
DOIs
Publication statusPublished - 2021

Keywords

  • Corrosion (C)
  • Raman spectroscopy (B)
  • SEM (B)
  • Steel reinforced concrete (A)
  • XRD (B)

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