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
Jazyk: angličtina
Rok vydání: 2021
Předmět:
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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