Environmental Design + Construction - September 2008 - (Page S10)

CONCRETE REDUCING THE URBAN HEAT ISLAND EFFECT ONE OF THE WAYS PERVIOUS CONCRETE PAVEMENT (ANY CONCRETE PAVEMENT, IN FACT) CAN HELP EARN LEED POINTS AND HAVE AN OTHERWISE POSITIVE IMPACT IS BY REDUCING THE URBAN HEAT ISLAND (UHI) EFFECT. A HEAT ISLAND IS A LOCAL AREA OF ELEVATED TEMPERATURE IN A REGION OF COOLER TEMPERATURES; HEAT ISLANDS OCCUR WHERE THERE IS A PREPONDERANCE OF DARK EXTERIOR BUILDING MATERIALS AND PAVEMENTS, AND A LACK OF VEGETATION. RESEARCH PERFORMED BY CTL GROUP IN 2007 EVALUATED THE REFLECTIVE PROPERTIES OF CONCRETE, USING THE LEED NC SS CREDIT 7.1 HEAT ISLAND EFFECT: NON-ROOF CRITERIA, AND FOUND THAT 45 DIFFERENT CONCRETE SAMPLES TESTED — REGARDLESS OF THE MIX (SOME OF WHICH INCLUDED RECOVERED MATERIALS LIKE FLY ASH AND SLAG CEMENT) — MET THE REQUIRED CRITERIA. 2.5” G TIN LA SU IN MS OR EF ET R NC CO 16” 48” The E2 City Homes development in Minneapolis shatter outmoded stereotypes of what a concrete home is like; the interiors are warm, comfortable and inviting — and award-winning, with accolades from the National Association of Home Builders and Insulating Concrete Form Association, among others. Photo by Dana Wheelock, courtesy of LHB. RESOURCE EFFICIENCY: GREAT RIVER ENERGY HEADQUARTERS The recently finished Great River Energy headquarters in Maple Grove, Minn., “Will be the most energy-efficient office building ever constructed in Minnesota and one of the most energy-efficient in the world,” says CEO David Saggau. Architects Perkins + Will and general contractor McGough Construction have designed and constructed a poured-in-place concrete structure that contains fly ash replacement of between 40 percent and 50 percent. In line with the company’s goal to make best use of natural resources, the building will harvest daylight through multiple light-filled atriums; a two-way post-tensioned flat plate gravity load system does this by using floor plates made up of four long, narrow “pods” with either atrium or exterior spaces between them. The shallowest system available, it allows the project to use raised floors throughout to accommodate mechanical air distribution, and to have high ceilings and shallow floor-to-floor heights to maximize daylight penetration. The company is aiming for LEED Platinum certification. + READER SERVICE NO. WWW.EDCMAG.COM s10 180 WWW.EDCMAG.COM/WEBCARD http://www.buildblock.com/LEED http://www.edcmag.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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