Park Avenue West Tower Portland, OR avenue west tower.pdfplacement of the 6" slump slab on metal deck mix and 10" slump 8000 psi core wall mix needed to be pumped 500' (300' vertically)

Park Avenue West Tower

Portland, OR

Technical Information Project Completion Date: January 25, 2016

Project Location: Portland, OR

Size of Project: 45,000 cubic yards; 546,000 square feet; 5,000 cubic yards mat-slab pour

Concrete Strength Requirements: 3,000 – 8,000 psi

Water/Cement Ratios: Various

Unique or High Volume Admixtures: Extensive High Range WR for 8,000 psi core wall Mid-range WR for slab on metal deck Delvo setretarder for placement in warm weather.

Total LEED Points Attributed to Concrete Construction: recycled contents and local concrete materials helped the project secure preconstruction LEED Platinum certification with the U.S. Green Building Council.


Unique Mix Designs: 8,000 psi core wall mix achieving slumps to 10" after pumping 500 total feet (300' vertically)

Unique Specifications/Requirements: 5,000 cubic yard Mat slab placed in one continuous pour, requiring concrete delivery of up to 600 yards per hour. Completed in 10 hours!

Placement Challenges or Unique Techniques: As the project neared completion, placement of the 6" slump slab on metal deck mix and 10" slump 8000 psi core wall mix needed to be pumped 500' (300' vertically). Slump and specification requirements needed to hit the marks after pumping. Delvo set stabilizer was critical in warmer temperatures.

Other Special Technical Aspects: A level of core wall was poured every 7 working days with a self climbing wall form work system independent from the crane Early strengths confirmed by a maturity meter were critical as the system Used inserts in previously poured wall and hydraulic jacks to lift.



Construction on the Park Avenue West Tower began the end of

2008 with a successful Matslab pour being delivered on Jan., 10th 2009. 4,910 yards were placed in

ten hours through 4 concrete pumps. During one of the highest production times,640 cubic yards were delivered in one hour. A full

concrete truck arrived and an empty one left every 60 seconds.


The project went on hold shortly after, leaving an excavated hole in the heart of Portland until 2013, a sad reminder of the struggling economy.


Center to the project was the corewall formwork system. A level of 8,000 psi corewall was poured every 7 working days with the self

climbing wall formwork system independent from the crane.


The corewall quickly became part of Portland's skyline.


Early concrete strengths confirmed by a maturity meter were critical to the schedule. The system used hydraulic jacks inserted into previously poured

wall sections to "jump" the heavy form structure each week.


Park Avenue Tower's 8,000 psi corewall continues to climb.



The tower is topped out at level 31 on this final pour, joining the ranks of the city skyline as Oregon's 4th tallest building.


Bright finishes follow the tower upward towards completion.


As the project neared completion, placement of the 6" slump slab on metal deck mix and 10" slump 8,000 psi core wall mix needed to be pumped 500', (300' vertically). Slump and

specification requirements needed to hit the marks at placement.


Park Avenue Tower stands as Portland's 4th tallest building.


Documents

Park Avenue West Tower Portland, OR avenue west tower.pdfplacement of the 6" slump slab on metal deck mix and 10" slump 8000 psi core wall mix needed to be pumped 500' (300' vertically)