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

Emanuele Rossi*, Hongzhi Zhang, Santiago J. Garcia, Johan Bijleveld, Timo G. Nijland, Oğuzhan Çopuroğlu, Rob B. Polder, Branko Šavija

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
28 Downloads (Pure)

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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