Wooden groynes and concrete sea walls protect against wave energy and erosion
DUPLEX STAINLESS STEEL REBAR REINFORCES UK SEA DEFENCES
RISING SEA LEVELS REQUIRE STRONG PROTECTION FROM THE SEA
Cromer, an English town on the stormy North Sea coast, needed to rebuild its sea defences and prepare for rising sea levels over the next 100 years. The town’s 2013 coast protection scheme included refacing the concrete sea walls and improving parapet walls. Duplex stainless steel rebar was chosen to support the concrete because of its superior corrosion resistance. With a critical chloride threshold level ten times greater than carbon steel rebar, stainless steel required less concrete cover while retaining its integrity and strength in spite of chloride ingress from the saltwater. It is virtually maintenance-free, has a low life cycle cost and will maintain its corrosion resistance over the designed life of the sea defences.