Restoration & Waterproofing of Drinking (Clean) Water Reservoir

Project: Waterproofing & Protection of Whalley Drinking (Clean) Water Reservoir, Surrey, British Columbia, Canada
Designer: Levelton Consultants Ltd. (now WSP)
Owner: Metro Vancouver
Contractor: J.W. Farkas Concrete Restoration Ltd.
Products: Cem-Kote Flex ST, Reinforcing Fabric HD & accessory materials  
Objective: Waterproofing and Protection of an existing drinking (clean) water reservoir tank, located in the Whalley Reservoir Park, Surrey, British Columbia.

This huge tank, with an area over 10,000 m2 (105,000 ft2), had very serious leaks and erosion of the base slab and incline surfaces.

The concrete surface was cleaned using 48 MPa (7,000 psi) high-pressure water, to remove all deteriorated surfaces and obtain a clean and profiled surface.

Deteriorated concrete was waterproofed and protected with Cem-Kote Flex ST – cementitious flexible high-performance coating, that was spray applied and brush finished in two coats to avoid any pinholes.

All leaking construction and expansion joints were treated separately.

Complete project was completed in just 3 weeks between Dec. 2012 and Jan. 2013.

Temperatures during the application were down to 5oC (40oF), and relative humidity was 100%, making it impossible to apply any polymer (epoxy or polyurethane) coatings, which fail under similar environmental conditions.

Cem-Kote Flex ST, which allows applications at any humidity and even over water saturated (waterlogged) concrete, is a preferred choice for any specifier.

Inspection of the tank in November 2013 showed no delaminations or cracking of the Cem-Kote Flex ST, and the coating was tough and strong, yet flexible.

Figure 1 Very rough slab surface

Figure 2 Interior of Whalley Reservoir

Figure 3 Spraying of Cem-Kote Flex ST

Figure 4 Spraying of Cem-Kote Flex ST

Figure 5 Interior of Whalley Reservoir