KRYSTOLTM CONCRETE WATERPROOFING SYSTEM
Shaw Tower Parkade
Tallest Building In Vancouver, B.C.
BACKGROUND
The 3,000 m³ of concrete placed for the huge raft slab foundation of the Shaw Tower set the record for the largest continuous pour in the history of Vancouver. When complete the tower will be the city's tallest at 149 m. Totaling more than 38,000 m3 of concrete covering 532,000 sq. ft of office and residential space.
Because the building sits so close to the harbour, water intrusion was a major concern in the underground parking. In fact, at high tide, the ground water rises 3 ft. above the lowest parkade level. Extreme tides, storms and other conditions could push it even higher.
With existing structures abutting the tower basement, installing a membrane would have been difficult and costly. Instead, Ocean Concrete supplied Ocean WaterGuard Concrete, a mix containing Kryton's "Krystol™ Internal Membrane (KIM™)" admixture in all below-grade walls.
SOLUTION
Besides offering a wide variety of mixes to help Ledcor and Micron meet specifications and stay on schedule, Ocean Concrete has suggested a number of cost-saving changes.
Ocean WaterGuard Concrete with Krystol waterproofing admixture, has eliminated the need for an exterior waterproof membrane around the underground portion of the five-level parkade.
Tests have shown that "Krystolized" concrete can hold back hydrostatic pressure with up to 140 ft. of head. |
