Projects Archive: Beton Bauen Implement Fusion Technology at Aberdulais East Overbridge, A465

Beton Bauen take a retrospective look at a 2021 project involving corrosion protection intervention, to prolong the lifespan of an overpass bridge on the A465.

Image displayed, courtesy of Vector Corrosion Technologies

Original article by Vector Corrosion Technologies Edited by Dan Brennan on behalf of Beton Bauen Limited, November 2025

Project Details  

Project Title: Aberdulais East Overbridge, A465

Sector: Transport Infrastructure

Project Duration: 2021

Our Client: Knights Brown On Behalf of: SWTRA (South Wales Trunk Road Agency)

Other Partners: Vector Corrosion Technologies; Atkins; Sika

Project Overview A465 180 (Aberdulais East Overbridge) was constructed in 1975. The structure had a 120-year design service life but required corrosion protection intervention to reach the remaining 75 years of the service life. The Aberdulais Bridge is owned by the South Wales Trunk Road Agency. Before embarking upon a concrete repair and protection initiative, the Agency worked with the consulting engineer Atkins to evaluate the structure and determined that the abutment walls, beams, and columns were showing early signs of corrosion to the reinforcing steel caused by the ingress of chloride ions from road salts.

Images displayed, courtesy of Vector Corrosion Technologies

The Solution

The Aberdulais Bridge is owned by the South Wales Trunk Road Agency. Before embarking upon a concrete repair and protection initiative, the Agency worked with the consulting engineer Atkins to evaluate the structure and determined that the abutment walls, beams, and columns were showing early signs of corrosion to the reinforcing steel caused by the ingress of chloride ions from road salts.

Vector's local representative Sika provided Galvashield Fusion T2 two-stage anodes which were selected as the preferred corrosion mitigation option to provide 30 years of protection.  During the initial stage, Galvashield Fusion T2 provides impressed current cathodic protection via an internal power supply to passivate active corrosion, then automatically switches to galvanic maintenance current. The simplicity of installation and proven performance of the Fusion Technology were key to its use on this project. A total of 1,500 Galvashield Fusion T2 anodes were installed by Beton Bauen, a specialist contracting company based in Caerphilly, South Wales. To ensure that the installed system was performing as designed, performance validation was completed by an independent qualified cathodic protection engineer.

Technology Solution

Galvashield® TP - Galvanic Anodes Discrete embedded galvanic anode for corrosion prevention in concrete repairs. View Documents

Galvashield® Fusion® T2 - Fusion Technology

Self-powered two-stage anode for proactive protection of reinforced concrete structures.

View Documents