Rehabilitation of sewer pipelines due to hydrogen sulphide attack has remained a difficult and often misunderstood problem. Many repair and protection systems have been tried in the past with varying degrees of success, without completely solving the long term problem of concrete degradation.

The Linabond Co-lining system uses the strengths of both current repair and lining systems, epoxies and liners. Paul Daffy of Savcor ART said, “This provides a protection system which outperforms each component part. The Co-liner utilises a spray or trowel applied hybrid structural polyurethane and an extruded PVC liner to provide an impermeable protection system against hydrogen sulphide attack”.

The polymer aims to provide both an extremely effective anchoring method for the PVC liner and an effective backup protection system for the PVC. The polymer is able to be applied in a high build layer and penetrates the concrete substrate prior to polymerisation, forming a saturated zone of high strength composite material, part concrete, part polymer. Since the material is applied over the entire surface, it prevents lateral migration of fluids and gases behind the PVC liner – guarding against a key cause of failure for traditional mechanically anchored liners.

Mr Daffy said, “The PVC liner sheet is a pin-hole free membrane which has proven itself over the past 50 years in the protection of wastewater structures. To the company’s knowledge the system has never failed.”

Article continues below…

For more information on Linabond, contact Paul Daffy at Savcor ART Pty Ltd on (03) 9993 7500.