Title:
Corrosion-inhibiting Systems in Reconstructed Bridge Barrier Walls
Author(s):
Daniel Cusson and Noel P. Mailvaganam
Publication:
Concrete International
Volume:
21
Issue:
8
Appears on pages(s):
41-47
Keywords:
barrier walls; bridges; corrosion inhibitors; field performance; monitoring; instrumentation
DOI:
Date:
8/1/1999
Abstract:
Although many different corrosion inhibitors have been available for the past few years, the mechanism of inhibition is not yet fully understood. Furthermore, there is much debate about their effectiveness under field conditions. Monitoring techniques used in an ongoing field evaluation of the long-term performance of proprietary corrosion-inhibiting systems in a reconstructed concrete bridge barrier wall are described. The field monitoring consists of periodic surface corrosion surveys and continuous remote sensing using embedded sensors. It is also corroborated by a laboratory study on concrete cores and field-cast reinforced concrete prisms. It is anticipated that the investigation will provide an improved understanding of product performance in the field and enable bridge owners to make informed decisions in the selection of corrosion-inhibiting systems.