Session: Corrosion of Reinforced Concrete Structures: Coatings and Concrete
Assessment of the corrosion protection of seven wire steel strand provided by flexible fillers (C2026-00080)
Thursday, March 19, 2026
10:30 AM - 11:00 AM Central
Location: 371 DE
Earn .5 PDH
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Francisco Presuel-Moreno, Francisco Presuel-Moreno, Amanda Armudi
Flexible Fillers are specified by the Florida department of transportation instead of grout for post-tension tendons in bridges. The tendons are considered unbounded when a flexible filler is used. Several years ago, the anchorage of a bridge in the UK was not properly sealed and that allowed corrosion of the steel strand even in the presence of flexible filler surrounding the steel strands. There are concerns that voids could be present if the duct is not completely dry or if the filler is not pumped properly or due to temperature cycles some of the filler leaches out. If the anchorage is not properly sealed, then moisture and potentially rain water with salts could penetrate. The current project aims to understand the corrosion initiation and propagation in cases in which water with salts or high moisture penetrates the duct during service. Samples prepared as part of previous project in which polycarbonate tube was used were drilled to create voids and different NaCl solution concentrations injected. This paper describes the findings after at least 5 months of environmental exposure.
