case study:
Due to the failure of the existing bitumen waterproofing, water was seeping into the base of the silo, leading to product loss. Moreover, the water ingress had caused corrosion in the lower level sheets, necessitating their replacement. These repairs were particularly challenging as they had to be carried out during the winter months.
APPLICATION AND RESULTS
We suggested using our polyurea waterproofing system to create a long-lasting seal for the silo base. After the client replaced the corroded sheets, we used high pressure water jetting to prepare the concrete plinth. The moisture introduced during this process was not a problem because the proposed specification allows the waterproofing material to bond to a damp surface.
Because the waterproofing material can adhere to new galvanizing without the need for abrasive blasting or a bonding bridge, no additional preparation was necessary for the new sheets, except for a quick wash to remove grease.
To isolate the subsequent membrane from any potential movement, we applied a polyurethane sealant at the interface between the metal sheets and the concrete plinth. We used roofing torches to dry the area before applying the sealant to ensure good adhesion.
Once we were satisfied with the preparation, we applied two coats of EnviroThane. This flexible polymer coating can be applied to damp surfaces and in temperatures as low as 5 degrees Celsius.
The client was very happy with the results, and as a result, they placed an additional order for sealing another silo base.
The applicator ended the project by conducting tests on the polyurea applied substrate. This involved affixing 20mm dollies to the surface. After allowing the glue to set for 24 hours, the dollies were then drilled using a 20mm coring hole bit.
- Pull 1: 619psi (95% substrate, 5% cohesive failure in coating)
- Pull 2: 714psi (100% substrate failure)
- Pull 3: 488psi (100% substrate failure)
- Pull 4: 621psi (40% substrate, 60% adhesive failure between substrate and coating)
- Pull 5: 251psi (75% substrate, 25% adhesive failure between substrate and coating)
- Pull 6: 723psi (100% substrate failure)
Case Details
Client Details
Dover Ray Silos
Service Provided
Silo waterproofing using ArmorThane EnviroThane polyurea
Project Timeline
1 day of spraying application
Let Us Help You !
Looking for a specially trained and certified ArmorThane applicator in your area?
