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

An elastic modulus-mineralogy characterization

Journal article (2021)

Authors

E. Rossi Materials and Environment - CEG
Hongzhi Zhang Shandong University
Santiago J. Garcia Novel Aerospace Materials - Aerospace Engineering
J.C. Bijleveld Novel Aerospace Materials - Aerospace Engineering
Oguzhan Copuroglu Materials and Environment - CEG
R.B. Polder TNO, RPCP, Materials and Environment - CEG
B. Šavija Materials and Environment - CEG
Research Group
Materials and Environment (CEG) (TU Delft)
Copyright: © 2021 E. Rossi, Hongzhi Zhang, Santiago J. Garcia, J.C. Bijleveld, Timo G. Nijland, Oguzhan Copuroglu, R.B. Polder, B. Šavija
DOI: https://doi.org/10.1016/j.corsci.2021.109356
More Info
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Published Date

2021

Language

English

Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

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.