Analysis of naturally-generated corrosion products due to chlorides in 20-year old reinforced concrete: An elastic modulus-mineralogy characterization
Autor: | Santiago J. Garcia, Johan Bijleveld, Timo G. Nijland, Branko Šavija, Hongzhi Zhang, Oğuzhan Çopuroğlu, Emanuele Rossi, Rob B. Polder |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Raman spectroscopy (B)
SEM (B) Goethite Materials science Steel reinforced concrete (A) 020209 energy General Chemical Engineering Maghemite 02 engineering and technology engineering.material Corrosion Matrix (geology) symbols.namesake 0202 electrical engineering electronic engineering information engineering General Materials Science Corrosion (C) Composite material Elastic modulus XRD (B) General Chemistry 021001 nanoscience & nanotechnology Characterization (materials science) Cracking visual_art engineering symbols visual_art.visual_art_medium 0210 nano-technology Raman spectroscopy |
Zdroj: | Corrosion Science: the journal on environmental degradation of materials and its control, 184 |
ISSN: | 0010-938X |
Popis: | 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. |
Databáze: | OpenAIRE |
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