Lining Project Proves Long-Term Success in
Immersion Service Kamloops, British Columbia
PROJECT DETAILS
In 2006, Stonhard was contracted to complete a re-lining of an existing Stonchem 510 lining system in a below-grade acid sewer at a mill site. This was a complex project involving confined space entry and immersion-grade concrete lining, all performed on a time and materials basis during a scheduled mill shutdown. The goal was to ensure the sewer was returned to service on time to support the mill’s restart.
PRODUCTS USED: STONCHEM 510
AREA : ACID SEWER
THE STONHARD SOLUTION
To meet the project’s tight schedule and technical demands, Stonhard assembled a specialized team. Two sub trades were brought in to support the operation, providing water jetting services for surface preparation, and an industrial coatings and linings specialist for added supervision and coordination on site. Stonhard also supplied a Technical Representative and two crews who were trained and certified for confined space work. The crews were scheduled in offset shifts to ensure continuous progress and adherence to the shutdown timeline.
The project involved re-lining an existing Stonchem 510 system that had been applied to the floors and walls years prior. Despite its age, the original lining had performed exceptionally well. Once surface preparation was complete, it became evident that the substrate was no longer uniform. As anticipated, the preferred method for applying the mortar in these conditions was by gloved hand rather than trowels. This approach allowed for better adaptation to the irregular surface and ensured a consistent, high-quality finish.
The environment in which this lining operates is extremely harsh. The sewer handles continuous flows from the mill containing sulfuric acid at approximately 100°F, with a pH range between 2 and 7, and residual chlorine dioxide. Despite these challenging service conditions, the re-lined system has remained intact and operational without issue.
In 2021, the lining was inspected using a drone. The inspection revealed no defects or concerns, and as 2024, no issues have been reported. The system continues to perform reliably and is scheduled for re-inspection in 2025.
This project stands as a strong example of the durability and performance of the Stonchem 500 Series Linings, particularly in aggressive chemical environments. The success of the installation also highlights the importance of experienced crews, detailed planning, and proper application techniques in extending the lifespan of critical infrastructure.
PULP & PAPER
