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CONTRACTOR: JFR Concrete Repair

 

The Kersland Reservoir, a 17 million gallon reservoir servicing Richmond, BC, was built in 1955. The original Sika I Gas joint sealant had failed and the reservoir was losing significant amounts of water.

The repair plan initially consisted of using a combination of urethane injection, Sikadur Combiflex and a majority of Sikaflex 2c. But it was felt that removal of the old Sika I Gas joint sealant and the prepping of the joints to receive the Sikaflex 2c would take too long and could not be done within the time frame required in order to put the reservoir back in service. It was decided to leave the Sika I Gas joint sealant in place and bridge all the 12,500 lin ft of joints with the Sikadur Combiflex system.


Surface prep for the Sikadur Combiflex system included scraping and grinding both sides of the joint.

Installation:
- All joints in the Sikadur Combiflex are hot air heat welded.
- A bed of Sikadur 31 Gel (NSF grade, for potable water) is put down on both sides of the joint.
- Sikadur Combiflex is applied, centred on the joint, a roller is used to insure full contact and adhesion.
- A second layer of Sikadur 31 is applied encapsulating both sides of the joint
- The red indicator stripe is removed.


Metro Vancouver is monitoring the project pretty closely, as they are looking at doing this in two other reservoirs (one smaller and one larger), the project was completed three days ahead of schedule.