The solution

Intercrete 4840, an advanced cement and epoxy modified polymer coating was chosen to provide long term protection in this aggressive environment because of its excellent chemical and abrasion resistance. Following removal of contamination and unsound concrete, Intercrete 4802, a rapid setting repair mortar, was used to reinstate the weirs and effluent troughs prior to the application of Intercrete 4820, a cementitious fairing coat for filling minor defects. 2mm of Intercrete 4840 was then applied to provide long term protection. Work on the first clarifier was completed in 2004 and the second treated the year after. An inspection in 2007, has shown the system to be performing well.