Journal
CORROSION SCIENCE
Volume 184, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2021.109356
Keywords
Corrosion (C); Steel reinforced concrete (A); Raman spectroscopy (B); XRD (B); SEM (B)
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The study investigated the elastic modulus of naturally-generated chloride-induced corrosion products in different concrete mixes. Microstructural characterization was carried out using nano-indentation, electron microscopy, and Raman spectroscopy. The results showed that the corrosion products consist mainly of a goethite matrix with portions of maghemite, and the elastic modulus varied between 80-100 GPa.
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.
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