Structural Concrete Alliance announces 2015 award winners

The Structural Concrete Alliance has announced the winner of the 2015 Structural Concrete Alliance Award for Repair and Refurbishment as Concrete Repair Association member Bersche-Rolt for its concrete repair and coating works to the Barry Island Eastern Shelter in September 2014.

The award was presented to the company by broadcaster Huw Edwards during the Concrete Society Awards held at the Grosvenor Hotel, Park Lane, London on 4 November 2015.

Bersche-Rolt Ltd completed concrete repair and coating works to the Grade II listed Barry Island Eastern Shelter, as part of a significant regeneration of the Eastern promenade for Vale of Glamorgan Council.

The reinforced concrete structure, constructed in the 1930s, has a concrete roof slab supported by columns on the seaward side, a retaining wall on the landward side and a series of primary and secondary concrete beams. All structural elements showed signs of concrete defects, with cracking and delamination within the beams and columns, reinforcement corrosion and peeling and discoloured paintwork.

Working closely with consultant engineers, Bingham Hall Partnership, Bersche-Rolt first carried out a survey of the structure before preparing a specification for the repairs, using products from Sika. Works included cleaning and priming the reinforcement, the application of a bonding bridge, erecting shuttering and repairing the concrete. The complete structure was then coated with a three-part protective anti-carbonation system in a decorative coloured finish.

Commenting on the award, the judges stated:

“The Alliance judging committee agreed this was the winning project given the professional and sympathetic approach to restore and enhance the structure to extend its service life within the landscape on Barry Island.”

“The main aim of the initiative was to create a scheme of urban realm improvements which would create a contextual improvement to this part of Barry Island and act as a catalyst for further private sector investment.

“The Eastern Shelter, now fully restored, sits proudly within the surrounding landscape and on Barry Island’s rejuvenated Eastern Promenade.

Second place was awarded to Sika Ltd for its solution for Britannia House, a 1930s building with a concrete-encased steel frame in the heart of Bradford city centre. The building was showing signs of corrosion to its masonry exterior and steel frame. Sika supplied a variety of products to seal the building envelope, stop water ingress and repair and strengthen the structure.

Specialist contractor Freyssinet applied a Sika Monotop cementitious two-component system, consisting of polymer modified mortars, to make primary repairs to the concrete and provide a smooth, level finish. A  Sika Ebonex cathodic protection system was installed to the top three levels to protect both the concrete and the steel from further deterioration and to provide structural integrity.

Balfour Beatty Concrete Repairs was awarded third place for its repairs to the Sherborne Footbridge in Salford.  The bridge tendons of this reinforced concrete superstructure were suffering from chloride induced corrosion and there was severe spalling of the cross head beams; while the pre-cast concrete panels of the bridge deck were beyond repair.

Balfour Beatty’s solution involved the installation of a unique DuoGuard hybrid anode system, designed by Corrosion Preservation Technologies, and the use of carbon fibre plates to add additional strength to the superstructure. The cross head beams were repaired using Fosroc hand-placed repair mortars, while the adjacent concrete was protected by a CPT Patchguard anode system. The existing precast bridge deck was replaced with a composite deck.

The winners were chosen from entries received from members of the three trade associations which make up the Structural Concrete Alliance: the Concrete Repair Association (CRA); Corrosion Prevention Association (CPA); and the Sprayed Concrete Association (SCA).

The Structural Concrete Alliance is an umbrella organisation which brings together the Concrete Repair Association (CRA), Corrosion Prevention Association (CPA) and Sprayed Concrete Association (SCA) to provide a single co-ordinated voice for the structural concrete refurbishment and repair industry. It offers a single point of contact for major clients and a definitive source of information and advice for all involved in the repair, refurbishment and management of concrete infrastructure and the protection from corrosion of a wide range of structures.

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