Influence of ethanol amine inhibitor on corrosion of steel in concrete with ground granulated blast furnace slag subjected to asimulated marine environment

Author(s): A. El Shami, S. Bonnet, M. Choinska, P. Mounanga, A. Khelidj
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 1120 - 1131
Total Pages: 11
Language: English

This paper presents the importance of micro structural studies for understanding concrete durability. The effects of ethanol amine based corrosion inhibitor (AMA) in concrete with ground granulated blast-furnace slag (GGBFS), on the corrosion process itself are investigated. The utilization of GGBFS as partial replacement of Portland cement takes advantage of economic, technical and environmental benefits of this material. This paper presents three experimental ways to evaluate the efficiency and the durability performances of inhibitors as reinforced concrete protection. The first method is based on study of mechanical and transport properties of concrete specimens. The second method is the efficiency of an amino alcohol-based inhibitor in solution of cement extract simulating the concrete. The third method is based on the application of the Nernst equation in chemical conditions simulating the pore concrete which is measured by impedance spectroscopy, rest potential and linear polarization. In the present study, one type of inhibitors (cathodic inhibitors (ethanol amine)) to control rebars corrosion in mortar is investigated. The measurements carried were: compressive strength, permeability, shrinkage, chloride migration and a corrosion resistance test of pore concrete simulating solutions conducted by varying the type and the concentration of inhibitor. The addition of inhibitors (AMA) in GGBFS concrete not only increased the compressive strength of the concrete but also improved the corrosion resistance properties.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00