Environmental Design + Construction - September 2008 - (Page S15)

CONCRETE An alley off of Chicago’s Rockwell Avenue, before (top) and after (bottom) pervious pavement was placed by the Chicago Department of Transportation. Images courtesy of Hitchcock Design Group. more typical new paving situations, he says, using pervious to eliminate conventional sub-drainage infrastructure trumps asphalt in both initial cost and extended service life. Created by CDOT and landscape architects at Hitchcock Design Group (along with civil engineering firm Knight E/A, environmental engineers Hey and Associates and material testers S.T.A.T.E. Testing), the program includes four pilot alley designs. There’s also a Chicago Green Alley Handbook full of sustainable principles for residents who live adjacent to alleys, says Bill Schmidt, senior associate with Hitchcock Design Group, whose sketches — based on his own alley — helped form some of the project concepts. The favorite design of David Leopold, project manager for CDOT, and Janet Attarian, the agency’s project director and sustainability coordinator, uses pervious pavement for a center trench in the alley and conventional pavement on the sides for wheel traffic. “We have a lot of alleys with adjacent basements…the center trench keeps the infiltration away from a building,” explains Attarian. They create a vertical approach by placing approximately five feet of aggregate beneath the pavement, surrounded by a waterproof membrane, to ensure water doesn’t seep into neighboring basements. The pervious concrete alleys do more than collect and divert stormwater. The high-albe- do concrete increases reflectivity and reduces the urban heat island effect (UHI), says Attarian; the concrete incorporates recycled slag cement; and the base course is recycled concrete aggregate. Leopold points out that by reducing the UHI effect, residents save money on air-conditioning costs, and by diverting water from sewer systems the city saves money on energy costs for pumping and cleaning the water before it’s returned to the Chicago River. By the end of 2008, about 60 alleys will be repaved with pervious concrete, and that number will continue to grow. Even the Chicago sports community is jumping on the pervious bandwagon. U.S. Cellular Field, home to the White Sox, recently placed the largest permeable parking lot in the country: 265,000 square feet of mechanically installed Unilock precast pervious pavers that include recycled content (slag cement). Chuck Sampey, director of development and facilities for the Illinois Sports Facilities Authority (which owns the ballpark) says the cost savings is in the millions, compared to installing underground storage systems and high-maintenance asphalt paving. For future projects, he says, “everything is moving toward a green solution — no doubt we’ll go for permeable pavers.” + MANUFACTURER PUTS PAVEMENT INTO ACTION An early adopter of pervious pavement for industrial use is Quality Block of Phoenix, Ariz. Owner Clem Hellman says his plant is known for its cleanliness — but the land where pallets of block were stored was plain soil, and operations in that area kicked up dust that collected on equipment. In summer 2007, Hellman worked with Arizona Materials and Phoenix Cement Company to create pervious pavement for 20,000 square feet of plant yard, the first-known industrial application, he says. Eight inches of pervious concrete were placed over 12 inches of aggregate to create pavement strong enough to hold stacks of four cubes of concrete block — each cube weighing 3,000 pounds — and to withstand frequent forklift traffic. “I have nothing but good things to say about it,” says Hellman, who praises the resulting cleanliness of his yard, the more stable storage area that offers increased flexibility, and the ability to hold stormwater in the pavement — eliminating the need to buy extra land for a retention pond. + SEPTEMBER 2008 Building outside the box We’re building a company that thinks outside the box — providing added value to you and your clients. Offering a comprehensive building system Full line of ICF products AmDeck® Floor & Roof System Amvic Buck System Contribution to LEED Certiﬁcation ENVIRONMENTAL DESIGN + CONSTRUCTION and full service & support: CHICAGO GOES GREEN…AND PERVIOUS The impact of Chicago’s new stormwater management ordinance is something the city’s department of transportation (CDOT) has to deal with every day, and the Chicago Green Alley Program aims to deal with flooding that impacts much of the city’s 1,900 miles of public alleys. New Amvic Design Software (ADS) Technical, Installation and Architectural manuals Training & Continuing Education Seminars Call today for more information Amvic + the power of added value 1.877.470.9991 www.amvicsystem.com 6/13/08 9:58:26 AM READER SERVICE NO. EDC07084AMVI.indd 1 176 WWW.EDCMAG.COM/WEBCARD s15 http://www.amvicsystem.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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