Launch Slideshow

Image

TCP's 2009 Greensite Awards

TCP's 2009 Greensite Awards

  • Image

    http://www.theconcreteproducer.com/Images/tmp485%2Etmp_tcm77-1297760.jpg

    Image

    250

  • Image

    http://www.theconcreteproducer.com/Images/tmp486%2Etmp_tcm77-1297761.jpg

    Image

    250

    Molin Concrete's campus lies within the Rice Creek Watershed District. As part of the project, the producer restored and enhanced an existing wetland area with native vegetation.

  • Image

    http://www.theconcreteproducer.com/Images/tmp487%2Etmp_tcm77-1297762.jpg

    Image

    250

  • Image

    http://www.theconcreteproducer.com/Images/tmp488%2Etmp_tcm77-1297763.jpg

    Image

    200

    Crews used a 154-ton, self-jacking tower crane to erect structural steel, and placed most of the concrete with a 92-foot placing boom and pump. A 99-ton crane and two hydraulic booms were dedicated to onsite rebar prefab and installation.

  • Image

    http://www.theconcreteproducer.com/Images/tmp489%2Etmp_tcm77-1297764.jpg

    Image

    250

  • Image

    http://www.theconcreteproducer.com/Images/tmp48A%2Etmp_tcm77-1297765.jpg

    Image

    300

    The building's green features include a water-based in-floor radiant heat system with a boiler that uses waste oil from fleet vehicles.

  • Image

    http://www.theconcreteproducer.com/Images/tmp48B%2Etmp_tcm77-1297766.jpg

    Image

    250

  • Image

    http://www.theconcreteproducer.com/Images/tmp48C%2Etmp_tcm77-1297767.jpg

    Image

    300

    The Glendale Park & Ride has been recognized for its pervious concrete, which reduces water runoff and urban heat island effect.

  • Image

    http://www.theconcreteproducer.com/Images/tmp48D%2Etmp_tcm77-1297768.jpg

    Image

    250

    In addition to environmental benefits, pervious concrete can reduce hydroplaning by preventing water from pooling on paved surfaces.

  • Image

    http://www.theconcreteproducer.com/Images/tmp48E%2Etmp_tcm77-1297769.jpg

    Image

    250

  • Image

    http://www.theconcreteproducer.com/Images/tmp490%2Etmp_tcm77-1297771.jpg

    Image

    250

  • Image

    http://www.theconcreteproducer.com/Images/tmp48F%2Etmp_tcm77-1297770.jpg

    Image

    300

    The Academy's hallmark 2.5-acre “live roof,” with iconic rolling hills, provides a layer of thermal insulation for the building.

  • Image

    http://www.theconcreteproducer.com/Images/tmp491%2Etmp_tcm77-1297772.jpg

    Image

    250

    Concrete was economical and added green features to The Encore on 7th, an 18-story retail and residential building in downtown Pittsburgh.

  • Image

    http://www.theconcreteproducer.com/Images/tmp492%2Etmp_tcm77-1297773.jpg

    Image

    250

  • Image

    http://www.theconcreteproducer.com/Images/tmp493%2Etmp_tcm77-1297774.jpg

    Image

    300

    The Primrose at Landfall is the first LEED Platinum home in Wilmington, N.C. It uses less energy and water and has a smaller carbon footprint than other homes its size.

  • Image

    http://www.theconcreteproducer.com/Images/tmp494%2Etmp_tcm77-1297775.jpg

    Image

    250

  • Image

    http://www.theconcreteproducer.com/Images/tmp484%2Etmp_tcm77-1297759.jpg

    Image

    140

High-Rise

Bay Adelaide Centre, Phase I / Toronto, Ontario

Bay Adelaide Centre, a 52-story, 1.2 million-square-foot office complex in downtown Toronto, presented unique logistic and scheduling challenges. Contractors had only 25 months to complete the West Tower, including excavating and shoring down 60 feet into the parking deck, working back up to grade, and enclosing and substantially completing all 52 floors to be ready for tenants. The construction team met the demanding schedule while using materials and practices that would allow owners to submit the project for LEED Gold Canada certification.

Once the concrete mix was developed, contractors began incorporating existing foundation walls into the building's shoring design, cutting into the operating five-level parking garage and working from within. They used a hydraulic, self-jacking, corewall jumpform designed specifically for this project's multi-celled core (22 cells). Contractors jacked up one floor every three days. By starting at the P3 level, the team was already at level six on the structural concrete core wall when they completed the ground floor.

Construction of the building's core walls was the job's main challenge. The core walls required more than 22,000 yards of concrete—about one-third of the concrete on the entire job—and it had to meet unique requirements. The concrete had to achieve a compressive strength of 60 MPa (8702 psi) in 91 days, an 8 MPa (1160 psi) in 12 hours (non-air entrained mix), flow through vertical pumps more than 50 stories high, and qualify for LEED certification.

The team selected self-consolidating concrete, with Canada Building Materials' LISA maximizer. Formwork had to be almost watertight and be able to handle the concrete mix's added pressure, which was considerably higher than conventional concrete.