The existing tiled floor was no longer fluid tight, allowing chemical spills and dirty water to enter the drinking water tank below, presenting a significant contamination risk.
As part of a significant program of risk reduction identified in coordination with our client we were requested to provide a bund lining and tanking solution to the plant room.
The existing tiles where present were generally firmly adhered, so to save cost and time the decision was made to apply the chemical resistant tanking system over the top of these.
To test the adhesion of the tiles a hammer test was first conducted. Any loose tiles were subsequently removed using vibration damped breakers.
Preparing the tiles for the new tank/bund lining
To ensure excellent adhesion of the new tanking/bund lining the tiles were first prepared using vacuum controlled diamond grinders.
Any missing tiles and voids were repaired using Remmers Betofix RM cementitious repair mortar applied using trowels.
Tiles can be a difficult surface to adhere to, fortunately however Remmers have a material specifically designed to adhere to such substrates. Remmers Epoxy FAS 100 was applied to all areas being tanked / waterproofed.
Sealing the upstands using a polyurethane jointing compound
Following priming all remaining pipe penetrations and upstands were sealed using a polyurethane jointing compound to ensure a leak free finish.
To provide the chemical resistant required Remmers Epoxy WHG was applied in two coats to a thickness of 1mm. The benefit of this material in addition to its excellent chemical resistance is its flexibility. This means that if minor movement does occur the coating should crack bridge, meaning that hazardous chemicals and contaminated water would not enter the drinking tank below.
A quartz aggregate was incorporated to provide slip resistance.