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Experimental and numerical behaviour of reinforced mortar plates subjected to accelerated corrosion
Author(s) -
Nguyen Quang Thanh,
Caré Sabine,
Berthaud Yves,
Millard Alain,
Ragueneau Frédéric
Publication year - 2011
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.947
Subject(s) - mortar , rust (programming language) , corrosion , cracking , materials science , composite material , reinforced concrete , chloride , carbon steel , displacement (psychology) , solid mechanics , structural engineering , metallurgy , engineering , computer science , psychology , psychotherapist , programming language
Most reinforced concrete structures are damaged due to corrosion of reinforcements in concrete. In normal conditions the pH near the reinforcements is around 12–13 which means that steel is in a passive state. But aggressive species, such as chloride ions or carbon dioxide, may penetrate into concrete and promote active corrosion. As a consequence (hydro)oxides are produced leading to degradation of concrete structures. For instance cracking of the concrete is generated due to the pressure induced by rust. In this paper, we study the inception and the propagation of cracking on reinforced mortar plates with rebars located either in the middle or at the corner. Additional experiments have been performed on cylindrical specimens to determine the local effect of rust pressure at the interface rust/mortar. The specimens have been subjected to imposed current density in order to enhance the corrosion and digital image intercorrelation has been used to determine displacement fields. The experiments have been compared to numerical modelling. Copyright © 2010 John Wiley & Sons, Ltd.