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Case Study - Concrete Storage Tanks

Client: XXXXX Hospital

Project Brief: The Internal Relining of 2 No. Concrete Potable Water Retaining Structures

System Specification: Solvent Free Polyurethane

Completion Date: 17th April 2009

COVAC Contract Ref: 833

Summary of Works

2 No. concrete, potable, water retaining structures located externally at XXXXX Hospital and sized at approximately 8.8m x 7m x 3.8m.

The external of the structure.

external of tank before treatment external of tank before treatment

The poor condition of the internal surfaces of the structure before relining.

water tank before treatment water tank before treatment water tank before treatment water tank before treatment

The existing cementitious lining system could be removed easily (with a finger nail) to reveal the original eroding concrete.

water tank before treatment water tank before treatment

The non (WRAS/DWI) approved bitumen which had been painted on the underside of the tank roof of each structure.

water tank before treatment water tank before treatment

Access to the tanks.

water tank before treatment water tank before treatment

The internal surfaces of the tanks having been drained of water, but prior to any work commencing.

water tank before treatment water tank before treatment water tank during preparation water tank during preparation

The internal substrate during preparation by our COVAC operatives, thus raising a suitable surface profile for the adherence of the coating system.

blow holes in the concrete tank blow holes in the concrete tank

Blow holes exposed within the concrete, clearly evident.

blow holes in the concrete tank blow holes in the concrete tank blow holes in the concrete tank blow holes in the concrete tank concrete tank during repair concrete tank during repair

The DWI Approved Cementitious Polymer Modified, Screed and Pore Filler being applied to the concrete surface which was allowed to cure and dry completely for the specified period.

water tank during repair water tank during repair

A comparison between the prepared concrete and the application of the DWI Approved Cementitous, Polymer Modified, Screed and Pore Filler.

concrete tank surface repaired concrete tank surface repaired

The DWI Approved, Cementitious, Polymer Modified, Screed and Pore Filler having been fully applied to the concrete internal surfaces.

water tank during coating water tank during coating

The tank receives an application of clear sealant.

water tank during coating water tank during coating

All joints, seams and intricate areas were initially ‘stripe coated’. These photographs show the substrates during the1st full coat of Solvent Free Polyurethane.

water tank before treatment water tank before treatment

All intricate areas were again ‘stripe coated’ for a second time, followed by the final application of Solvent Free Polyurethane.

water tank before treatment water tank before treatment

Call us today find out why you should use our alternative to water tank replacement on: 0800 772 3367.