Waterproofing and H2S protection of segmental concrete sewer tunnel, with an internal diameter 2.4 m (7’ 10”) and over 900 meters (1,000 ft.) long. This section was a test for a total sewer tunnel, that is approx. 10 km (6 miles) long.
Cem-Kote Barrier Cote 100 & Cem-Kote Flex CR system was selected due to the following advantages:
- Can be applied to water saturated surface moisture, and at high humidity.
- Stops water penetration from the Negative side
- Prevents debonding due to vapor condensation resulting in high capillary pressures at concrete-membrane interface
- Eco-Friendly & Non-Toxic
- Cost Effective – less than 50% of the Applied Cost of polymer coatings
After stopping active water leaks, the surface of the liner was pressure washed, and 1 mm (40 mils) thick coating of Cem-Kote Barrier Cote 100 spray applied and brushed.
The coating was allowed to air cure, before cleaning the surface using pressure water
One coat of Cem-Kote Flex CR – 1 mm 940 mils) thick, was spray applied and brushed to eliminate possible pinholes.
Results of bond test were outstanding, and data is available on request.