The interface between the bund walls and the concrete slab was not fluid tight when tested and there were areas of liquid penetration through the bund walls. A suitable bund lining solution was required in these areas.
We proposed the application of Remmers Epoxy WHG to resolve these liquid egress issues.
All surfaces were first prepared by method of vacuum controlled diamond grinding in order to clean the concrete in readiness for the application of the bund lining system. Diamond grinding mechanically removes surface laitance and contaminants which would be detrimental to the adhesion of the lining system.
Following preparation a cementitious grout coat in the form of Remmers Sulfatex was applied to the bund walls to fill the surface profile and irregularities that it would not be possible to fill with paint alone. As per best bund lining practice a cove detail was installed at the floor/wall interface to isolate this potential point of movement from the new lining.
Following hydration of the fairing coat all surfaces to be coated were primed using Remmers damp tolerant epoxy primer – Remmers Epoxy MT100. This ensured excellent adhesion of the bund lining system.
Remmers Epoxy WHG was then applied to all primed surfaces by method of brush and roller in two coats to a thickness of 800 microns. This material was selected as it remains flexible and can crack bridge to 0.25mm. This makes it particularly suitable for bund lining applications on concrete surfaces, where typically the design crack width is 0.25mm.
Finally as part of our standard quality assurance the new bund lining was spark tested to check for pin holing.