Title
Analysis of naturally-generated corrosion products due to chlorides in 20-year old reinforced concrete: An elastic modulus-mineralogy characterization
Author
Rossi, E.
Zhang, H.
Garcia, S.J.
Bijleveld, J.
Nijland, T.G.
Copuroglu, O.
Polder, R.B.
Savija, B.
Publication year
2021
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.
Subject
Corrosion (C)
Steel reinforced concrete (A)
Raman spectroscopy (B)
XRD (B)
SEM (B)
Buildings and Infrastructures
2015 Urbanisation
To reference this document use:
http://resolver.tudelft.nl/uuid:9f6b7a5c-1987-440f-a122-900c3c5fd4fd
TNO identifier
953093
Source
Corrosion Science, 184 (184), 1-13
Document type
article