1 x Concrete Manhole used in Trunk Line Sewer, Size = 1050 dia x 2.7m deep + biscuit
The manhole was in need of repair due to severe high levels of H2S attack and erosion.
The chamber was vented above and below the chamber on the sewer line and then an air mover was used to increase the ventilation and airflow. A high pressure power wash was followed by acid etch, wash down and then dried using the air mover.
Spraying took 1.5 hours including the preparation. 1 coat of Epoxy was applied at 6mm using approx 40 gallons of Epoxy resin
Redlands Shire Council were impressed with the outcome, more work followed.
Before; – with the temporary pipe to protect the epoxy spray from live sewer.
Manholes all approx 600mm x 600mm at various depths, ranging from .75m to 2m deep
Drainage system on chemical plant
Various, ranging from a very severe build up of mineral deposits to oil and grease residue and had previously been coated with an unknown material plus minor structural defects.
Chemicals were leaking into the water table causing pollution issues with EA. A sealed system was required because the drains had recently been re-lined because a sealed system was required
Where required the manhole was isolated using inflatable drain plugs and then high pressure power washed. Previous coating was removed using a scabbler. Mineral build up was removed using a CP9 and scabbler. The oil/grease residue was removed using acetone.