THE PROBLEM
The new bund required a bund lining to ensure that it was fully fluid tight.
Bund Lining Suffolk
THE SOLUTION
We proposed the application of a crack bridging bund lining in the form of Remmers Epoxy WHG. When lining concrete or masonry bunds we believe that it is always preferrable to use flexible linings where possible to allow the lining to move with the structure, rather than rigid fibreglass and conventional epoxy bund linings.
Initially all surfaces were prepared by method of vacuum controlled diamond grinding to remove surface laitance and contaminants. Laitance is the fines and water in the concrete which rise to the surface, creating a dusty and friable surface which will prevent proper adhesion of the bund lining.
As per best bund lining practice a cove detail was installed at the floor wall interface. This serves to spread and isolate the point of greatest potential movement from the bund lining.
The moisture content of the concrete was tested and recorded and the correct climatic conditions ensured by introducing heating as part of our standard bund lining quality assurance.
All surfaces to be coated were then primed using Remmers Epoxy MT100 moisture and oil tolerant epoxy primer to ensure excellent adhesion of the new bund lining. A thixotropic agent was added to fill the porosity in the walls to ensure a seamless fully sealed bund lining.
The first coat of Remmers Epoxy WHG was applied throughout the bund at a practical coverage rate of 0.5Kg/m2. This was followed by the reflecting and sealing of expansion joints in the slab using Remmers Multi Sil NUW.
A reinforcing bandage was embedded into Remmers Epoxy WHG over these expansion joints to allow the bund to be finished in one seamless application, giving additional strength where movement might be expected.
A second and final coat of Remmers Epoxy WHG was then applied at the same consumption rate as the first coat.
Finally as part of our standard bund lining quality assurance the bund was checked for pin holing using a DC holiday spark tester to ensure a pin hole free finish. In a bund lining a single pin hole can allow liquid egress.
Any defects identified with the spark test were made good using the same bund lining material.