Engineering - Bridge strengthening
Normally the adhesive is supplied in a tin into which, when required for use, the correct amount of FD808 hardener is poured from the accompanying polythene bottle. Once mixed, due to its limited pot life, the adhesive must be applied immediately.
As work on this bridge was on such a large scale the resin was supplied in drums and the resin was applied in sections, with excess adhesive squeezed out from one section being applied to the next. To achieve optimum curing temperature the sides of the bridge were shrouded in tarpaulins and gas heaters placed beneath: this enabled temperatures of 15-18°C to be maintained and curing to complete in 24 hours.
In all 816 metres of 400 x 100mm structural steel plate was attached to the bridge, using 4.5 tonnes of adhesive - believed to be the largest amount of adhesive ever used for a single application.
The whole operation was successfully completed within the specified time of 12 weeks.
Formulated Resins Ltd
© Formulated Resins Ltd 2004