Allington Sluice
Built in the 1930’s, the Allington sluice lock gate is the last on the Medway before it becomes tidal. During 2010 the sluice underwent a major refurbishment including new gates, lifting gear and gantry, repairs to the concrete structure, a new fish pass and new disabled access ramps.
Upon agreement of the extent of repairs, defective concrete was broken out to expose the corroded reinforcement, which was then prepared and primed using a cementitious coating. Where corrosion to the steel was excessive, additional reinforcement was fixed. Repairs were then carried out using a weber prebagged hand applied polymer modified repair mortar to within 15mm of the original profile.
Repairs were completed by priming with a weber epoxy resin and whilst tacky the application of the approved mix from the trials. Surfaces were then abraded to remove laitance exposing the aggregate matrix to varying degrees. Where appropriate, a soot wash was applied to the finished repair to simulate the result of many years of weathering of the concrete.
Resin injection techniques using weber.tec EP resins were also used to repair cracks where there was no evidence of reinforcement corrosion.