Heidelberg Materials North America is proud to have supplied slag cement for the TSX Broadway and Palace Theater Redevelopment project, which received the Slag Cement Association (SCA) 2024 Slag Cement in Sustainable Concrete High Performance Award. This award recognizes projects that use slag cement to enhance concrete properties. The project was also recognized as the 2024 Overall Winner of the international American Concrete Institute’s Excellence in Concrete Construction Awards and received a 2025 Concrete Innovations Award from the National Ready Mixed Concrete Association (NRMCA) for its extensive use of low-carbon concrete.
The TSX Broadway and Palace Theater Redevelopment project is a transformative urban development in the heart of Times Square, New York City. The 48-story, 660,000-square-foot building, reaching a height of 581 feet, integrates a hotel tower, entertainment venue, retail spaces, and the historic Palace Theater. The project spanned from 2017 to 2024 and involved state-of-the-art demolition and construction, which relied on the material properties of concrete.
Structural work began by excavating under the 111-year-old theater and constructing a 6-foot-deep beam under its masonry-bearing walls to lift the theater 30 feet above its original elevation. Super columns, comprised of 14,000 psi concrete, were cast at the theater's corners, and a post-tensioned girder system was constructed above the theater, each 44 feet deep and spanning 140 feet, to support 32-stories of new hotel space above the theater and tie into the project’s core walls and flat plate floors.
Of the 30,000+ cubic yards of concrete required for the job, 96% contained slag cement, and the project's 14,000 psi mixture utilized a 41% slag cement substitution to meet the exact structural requirements. The incorporation of slag cement reduced the project's embodied carbon by over 4,000 tons, yielding significant sustainable benefits.
Heidelberg Materials is very pleased to have supplied this amazing project. It truly highlights the sustainable and high-performance benefits of slag cement used in concrete construction.
- Contractor: Pavarini McGovern, LLC
- Structural Engineer: Severud Associates Consulting Engineers, P.C.
- Engineer (Foundation and Theater Lift): Urban Foundation/Engineering
- Building Envelope Architect: Perkins Eastman
- Historic Preservation and Theater Preservation Architects: PBDW Architects and Severud Associates Consulting Engineers, P.C.
- Concrete Contractor: Sorbara Construction Corp.
- Ready Mixed Concrete: Tec-Crete Transit-Mix Corp.
- Concrete: All Island Testing Associates
- Concrete Admixture Manufacturer: Sika Corporation
- Slag Cement: Heidelberg Materials North America