Concrete Tank

These scans show a concrete tank within the grounds of a hospital. The engineer was extremely concerned due to 'high bug counts' coming from the water within the tank. The internals of the tank had previously been lined with a loose fitting rubber lining. Unfortunately, the rubber lining had deteriorated after only two years in use and water had ingressed between the rubber lining and the substrate and began the process of stagnating. The rubber liner was removed and beneath this was a fibreglass lining system which had failed due to inadequate preparation having been applied directly onto a non-approved Bitumen.

The fibreglass and Bitumen was removed by means of dry abrasive blasting techniques prior to the application of a DWI approved cementitious screed in order to fill in small 'blow' holes and cracks.

This was then left to cure sufficiently prior to the application of COPON Hycote 165PW Solvent Free Concrete Sealer and two coats of COPON Hycote 165PW achieve a total nominal thickness of 1000 Microns (1mm).

A ten year 'single source responsibility' guarantee was then submitted to the client along with a COVAC Completion Report including photographs taken at strategic stages of the contract.