Safeway #3136

Barbur Blvd., Portland, OR

Technical Information Project Completion Date: November 2011

Project Location: 8145 SW Barbur Boulevard, Portland, OR

Size of Project: 5,978 Cubic Yards

Concrete Strength Requirements: 3,000, 3,500 and 5,000 psi

Water / Cement Ratios: 0.37, 0.38, 0.40, 0.46, 0.47, 0.55, and 0.56

Unique / High Volume Admixtures: Water Reducer- Grace WRDA-64, Water Reducer- Grace Daracem 55, Water Reducer- Grace Adva Flex

Unique Specifications / Requirements: The specifications called for a jet black color to be added to the ADA tactile warning areas.

Safeway #3136

Safeway #3136

The new Safeway (store #3136) is located on the busy Barbur Boulevard of Portland, Oregon. This grocery store is different than most as it contains an on grade parking garage for local shoppers who are transported by escalator to the store located on a

podium deck above.

Safeway #3136

Safeway #3136

The store sits on a 9” thick bonded post tensioned slab and un-bonded post tensioned beams with a 3” topping slab over 4” of high density foam.

Safeway #3136

The bonded system is less commonly used, as the concrete is cast around aluminum curved ducts with a set of tendons fished through the inside of the ducts.

Safeway #3136

Safeway #3136

Once the concrete has hardened, the tendons are tensioned by hydraulic jacks that react against the concrete member itself. When the tendons have been stressed, according to the design specifications, they are wedged in position to maintain tension after the jacks are removed, transferring pressure to

the concrete. The ducts are then grouted by a mixer/pump to protect the tendons from corrosion. The main advantage of using bonded post tensioning over un-bonded post tensioning, is that there is a

higher ultimate strength due to the bond generated between the strand and the concrete. The bonded system also allows the owner the flexibility of moving equipment around the property without

potentially damaging the post tension cables, as you may have with the un-bonded post-tension slab.

Safeway #3136

The Safeway (store #3136) project used approximately 5,711 cubic yards of concrete from beginning to end.

Safeway #3136