Bristol Flyover Wrapped Up With Sika

SikaWrap 300A, a strong and tough Aramid fabric wrap system, was recently chosen to protect the columns on Gypsy Lane Flyover on the A38 north of Bristol against vehicle impact damage.

This is the first time this system has been used in this application.

An initial assessment had established that two of the flyovers main concrete columns on this very busy junction, were particularly vulnerable, and a solution was required to prevent disintegration of the concrete in the event of a major collision.

The SikaWrap 300A system was chosen, and Concrete Repairs Limited, from their Bristol Office, were appointed to carry out the work to a design by Bristol engineers, Parsons Brinkerhoff.

SikaWrap 300A, a fabric consisting of Aramid fibres, was bonded, using the SikaDur range of epoxy resins, in five layers to encapsulate the columns over the vulnerable areas.

This has added strength to the circumference of the columns and will help to contain the concrete and increase shear capacity, helping to retain the integrity of the structure in the event of impact forces being applied.

SikaWrap 300A Aramid fibre wrap was chosen because it is tougher and less likely to be damaged, and absorbs shock loads better than corresponding carbon and glass fibre systems.

The SikaWrap 300A Aramid fibre system has been introduced specifically to strengthen bridges and buildings against blast and impact loads.

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