Environmental Design + Construction - September 2008 - (Page S9)

CONCRETE The E2 City Homes development in Minneapolis used ICFs to earn low HERS ratings, which contributed to earning more points toward their eventual Gold certification in LEED-H. Photo by Dana Wheelock, courtesy of LHB. a 100,000-square-foot recreation center and four field courts — a much-needed resource improvement for a school with a track program with 47 national championships under its belt. Wrapped around the facility is a dorm for 350 students, a space-saving design The North Central College Res/Rec Center’s precast that takes advantage of concrete components include recycled slag aggregate local land resources in in the mix. Image courtesy of Dukane Precast, Inc. the downtown area. Dukane Precast’s double-wall precast concrete components for walls and floors help the structure conserve resources, says the company’s vice president of sales and marketing, Brian Bock. (A bonus: the use of recycled slag aggregate from a local plant makes the concrete both lighter and stronger.) The form-finished sandwich-like components are filled with high R-value bio-based foam, and the resulting interior walls need only a coat of paint to become warm and inviting for students — while minimizing energy demands. The facility will also use geothermal wells and radiant floor heating. Bock says energy, performance and aesthetics drove the decision to create a unified facility. “The efficiency of heating one building instead of two is huge,” he says, and because the exterior walls are made with a brick form liner and painted to look like the real thing, the building blends with surrounding downtown structures. Bock and his team hope for LEED Gold certification. SEPTEMBER 2008 ENVIRONMENTAL DESIGN + CONSTRUCTION INDOOR AIR QUALITY One of the strongest concerns for sustainability-savvy building tenants and consumers is VOC emissions, and here, concrete does an admirable job of reducing VOCs. Compared to concrete, acrylic latex paint, plywood paneling and water-based EVA wall and floor glue release and emit significantly higher amounts of VOCs. Employing exposed concrete surfaces (which can be stained and stamped to produce limitless colors and patterns) cuts VOCs immensely. Plus, concrete more than three inches thick acts as an air barrier, reducing moisture infiltration (and the chance for mold development) and helping owners better control — and typically reduce — their HVAC needs. READER SERVICE NO. 172 WWW.EDCMAG.COM/WEBCARD s9 http://www.nudura.com http://www.nudura.com http://www.edcmag.com/webcard

Table of Contents Feed for the Digital Edition of Environmental Design + Construction - September 2008

Environmental Design + Construction - September 2008 Contents Web TOC Editor's Note Newsline New and Notable Announcing the 2008 Excellence in Design Awards Award Winner: Yale Sculpture Building Snapshots: College and Universities Teach Sustainability Color ISH North America Green Continuing Education Special Section: Concrete Product Focus Marketplace and Classifieds Advertiser's Index Underwater Adventures

Environmental Design + Construction - September 2008

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