Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 96, Issue -, Pages 434-441Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2015.08.037
Keywords
Concrete; Corrosion; Durability; Chloride; Monitoring; Reference electrode
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To monitor real-time the occurrence of localized corrosion in reinforced concrete structures a novel multi-reference electrode is proposed, consisting of a Series of metallic wires placed head-to-tail able to measure the corrosion potential of a carbon steel tendon or a rebar network. Available embeddable or portable reference electrodes give the local potential of the rebar; with the new system, a single potential reading can give the corrosion condition of a wide area. Copper, nickel and stainless steel were tested as candidate metallic materials: laboratory tests allow verifying their stability in alkaline condition. The ability to detect and locale corrosion was demonstrated on mortar and grout specimens, cast to simulate chloride-induced corrosion on post-tensioned tendons. (C) 2015 Elsevier Ltd. All rights reserved.
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