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Case Study : Water Filtration Facility Bund

Brief - Reason For Repair

  • Existing coating was failing and delaminating.
  • Concrete surface below was exposed in area.
  • Bund lining would not meet specifications for new tanks and processes.
  • Sump had completely delaminated and required action.

Preparation

  • Bund needed to be ground to remove previous coating to prepare the concrete and open up capillaries for a stronger bond to the existing floor.
  • Expansion joints were cut and cleaned using a v blade then repaired using an epoxy compound to create a stronger joint.
  • All inconsistencies are filled with an epoxy mortar to ensure a level surface.

Application - Sealing Coat

  • A sealant coat was then applied to the entire surface area of the bund.
  • Now the area is sealed it helps prevent any penetration by chemicals.
  • Bumpy/rough areas are then sanded and vacuumed.
  • The bund is now ready for chemical-resistant coats.

Application - Chemical Coat

  • The chemical-resistant coating was applied in two separate coats.
  • After each coat wet film thickness measurements are taken.
  • 500 Microns were needed for this application.

Top Coat - Walkway Installation

  • Now that the bund has been completed and tested an anti-slip walkway is to be installed in a traffic grey
  • Aggregate was broadcasted throughout the walkway to ensure an anti-slip surface
  • The walkway was taped up to ensure a perfect edge was achieved