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Projects: Case Studies

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Location: Delta, Canada
Owner: Metro Vancouver
Engineer: ABR, Associated Engineering, Brown and Caldwell Consultants Canada Ltd, Reid Crowther Partners Ltd., HBT Agra Earth & Environmental Ltd.
Contractor: Walter & SCI Construction (Canada) Ltd.
Ready-Mix: Ocean Construction Supplies Ltd.

Annacis Island Wastewater Treatment Plant (Upgrades)

Delta, Canada

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  • Annacis Island Wastewater Treatment Plant (Upgrades)

Background

In the mid-1990's, the Annacis Island Wastewater Treatment Plant upgraded its largest treatment plant from primary treatment to secondary treatment. The upgrade was a significant investment valued at $470 million CDN, requiring new concrete construction and improvements to existing infrastructure. Krystol Internal Membrane (KIM) Admixture was specified for waterproofing base slabs and walls in place of membrane and bentonite waterproofing at the deepest locations on site – three stories below the water table.

Solution

KIM eliminated all shrinkage cracking in base slabs and walls. For the following two and a half years, these areas were observed to be in perfect crack-free condition. Cracks began to appear in the walls near the end of 1996. These diagonal cracks were measured to be in excess of 0.5 mm (0.02 inches) in width. Water began to enter these cracks under high hydrostatic pressure. With the presence of moisture, Krystol growth immediately began to arrest leakage, permanently stopping the cracks from leaking.


Products and Systems Used:

Krystol Internal Membrane™ (KIM®)

Krystol Internal Membrane (KIM) is a hydrophilic crystalline admixture used to create permanently waterproof concrete.

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