A little insight to this weeks works……
Acid Bund Case Study.
We worked closely with the client to ensure we met all their needs. The client had requested the bund to be completed in Derakane 411-45 as this is the resin used on all the previous bunds. As we were aware of the substance the bund would hold and the clients spec we wanted to share our knowledge with them. On all previous chemical resistant jobs we have used Atlac 590 as we know its ability to withstand high acid levels. The client was pleased we had brought this to their attention but required to see the evidence on paper, this was something we were happy to provide. We contacted our supplier for the appropriate documentation demonstrating Atlac 590’s resistance levels. After speaking with a representative from Ashlands, we had what we needed and it did indeed show that Atlac 590 was superior to Derakane 411-45, it had a better resistance by 40%.
Atlac 590 can withstand sulphuric acid upto 80% and Derakane 411-45 was 40%.
The client was pleased with our knowledge and agreed to proceed with Atlac 590.
Job Specification:
The client had requested for us to provide a chemical resistant lining to a spill containment bund. They needed it to have resistance to sulphuric acid, this bund would be used to hold a tanks contents should it fail.
Method of Works:
- This bund had been shot blasted using steel shot and required sweeping before any works could take place. We also needed to ensure all the equipment was safe to use and had no damage. All risk assessments and method statements were read and followed.
- The bund was primed with Atlac 590. This is to ensure good adhesion of the fibreglass.
- Two layers of 600g chopped strand matting and a tissue veil fully wetted out with Atlac 590 using hand rollers.
- A further resin wash of Atlac 590 was applied using hand rollers and left to cure.
- Once cured the area is then hand sanded to remove any shape strands of fibreglass. Followed by a top coat, with a chosen pigmented resin. For this job the colour was brown on the interior and holly green on the exterior. There is a wax additive added to the top coat to aid the curing.
- Once cured the bund is to be sent to site for the tanks to be installed. We will then attend site to bond the tanks in.
- Once the tanks are bonded and the fibreglass has cured a spark test will be preformed, this is to ensure the lining is complete and there are no pinholes.
This bund is now fit for purpose and meets the clients requirements.
A good job well done!
Thanks for reading.
TJ
