Central Park Tower
Updated: May 24, 2024
New York, NY
Award: Innovative Applications
Project Team
Owner: Extrell Development Company
Contractor: GC-Lendlease/ Concrete - Pinnacle Industries
Architect: Adrian Smith + Gordon Gill Architecture
Engineer: WSP Global
Concrete: Empire Transit Mix
Slag Cement: Lehigh Hanson
Case Study
In this project a total of 100,000 cubic yards of concrete was used. Slag cement enhanced the project by:
High PSI (16k psi)
Sustainability (40% slag cement mix offered a significant co2 reduction)
Pumpability
Low heat of hydration for mass pours (70% slag) which were 12 feet thick.
The use of slag cement resulted in structural, sustainable and mass concrete attributes.
This tower is a super- tall skyscraper known as one of a handful of “Pencil-Towers” in the world. It is the tallest primarily residential building in the world, tallest building in the western hemisphere, and the tallest roof in the western hemisphere. This project has a 28 foot cantilevered section that starts at 300 feet above ground, over an adjacent building, and reaches up 1,200 feet above.
Application Type
% Slag Cement Replacement | 30 to 70% depending on application |
70 to 30% depending on application | |
% Portland Limestone Cement | None |
% Other SCM (if applicable) | 2 to 4% silica fume depending on application |
Aggregate | #67 and fine agg |
Water/cement ratio | .28 to .38 |
28-day Strengths | 9,000 to 14,000 psi depending on mix |
56-day Strengths | 12,000 to 18,000 psi depending on mix |
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