Analysis of naturally-generated corrosion products due to chlorides in 20-year old reinforced concrete

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

Rossi, E. (TU Delft Materials and Environment)
Zhang, Hongzhi (Shandong University)
Garcia, Santiago J. (TU Delft Novel Aerospace Materials)
Bijleveld, J.C. (TU Delft Novel Aerospace Materials)
Nijland, Timo G. (TNO)
Copuroglu, Oguzhan (TU Delft Materials and Environment)
Polder, R.B. (TU Delft Materials and Environment; TNO; RPCP)
Šavija, B. (TU Delft Materials and Environment)

2021

The elastic modulus of corrosion product (E_cp) has been reported with significant variations in the literature. This study aims to investigate the E_cp 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 E_cp varied between 80−100 GPa, which can be suggested for numerical models of corrosion induced cracking.

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

http://resolver.tudelft.nl/uuid:dcdd1101-e0c0-49fd-8607-36d4496cbce6

https://doi.org/10.1016/j.corsci.2021.109356

0010-938X

Corrosion Science: the journal on environmental degradation of materials and its control, 184, 1-13

Institutional Repository

journal article

© 2021 E. Rossi, Hongzhi Zhang, Santiago J. Garcia, J.C. Bijleveld, Timo G. Nijland, Oguzhan Copuroglu, R.B. Polder, B. Šavija