CONNstruction - Winter 2012 - (Page 9)

newsandviews ‘Green’ Product Enhances State Capitol By Matthew Hallisey A unique construction material – pervious concrete – is gaining increased acceptance from the industry, producers, owners, environmentalists, and the public alike because of its cost, versatility, and environmental benefits. Two years ago, pervious concrete was installed at the state Capitol building complex in Hartford as part of the federal Greening America’s Capitals program. The U.S. EPA-led program is designed to help state capitals develop environmentally friendly neighborhoods that incorporate innovative ‘green’ building and infrastructure strategies such as stormwater management. Consisting of cement and large coarse aggregate and water with little to no fine aggregates, pervious concrete has high porosity and functions like a stormwater infiltration system. It allows water from precipitation and other sources to pass directly through and infiltrate soil over a large area, thus reducing runoff, facilitating local groundwater recharge and enabling trees to flourish even in highly developed areas. Placement of pervious concrete on the grounds of the statehouse began in August 2010. Approximately 21,000 square feet of impervious materials in walkways, patio areas and sidewalks around the building and bordering the parking lot were replaced with pervious concrete. Installation was completed in early November of that year. While its placement may have taken only several months – and work was actually performed for only several weeks during that time period – planning, preparation of the site, and training of contractors and officials began a year earlier. Jim Langlois, executive director of Connecticut Concrete Promotion Council, conducted classroom workshops to help train MDC engineers on the unique qualities of pervious concrete and working with the product. Additionally, he monitored bids, CCIA Director of Government Relations and Legislative Counsel Executive Director, Connecticut Environmental and Utilities Contractors Association helped coordinate the work of contractors on-site, and served as a liaison between the project owner (MDC), sponsor (state Department of Energy and Environmental Protection), producers and contractors. He met with officials from the Office of Legislative Management to discuss maintenance and winter weather treatment of pervious concrete placed at the Capitol. “Officials were very interested in learning the new techniques,” said Langlois, “and legislative management personnel were very cooperative in meeting contractors’ needs.” U.S. EPA and DEEP funded the $1 million project. It also incorporates green roofs, rain gardens, rain harvesting and other porous surfaces. Final engineering design was completed by Camp Dresser & McKee (now CDM Smith); Laydon Industries, LLC was the pervious concrete placement contractor; and Tilcon Connecticut Inc. supplied the pervious concrete for the project. “We have had very good success with the project,” said Jay Drew, facilities project manager for the Connecticut General Assembly. After two winters, the pervious concrete “has held up well and worked as advertised – it requires less sand and ice melt and does not promote ponding or re-freezing.” State Capitol walking tours will feature the low impact development material, and informational handouts and signage will explain its function, application regarding stormwater runoff, and environmental benefits. A recent visit to the Capitol shows the pervious concrete wearing well under harsh New England weather conditions and relatively high traffic on walkways surrounding the building. Readers may wish to visit the Capitol building, which opened in 1878 and stands on a bluff above the picturesque setting of Bushnell Park, and view for themselves how pervious concrete enhances its value. CONNstruction / Winter 2012 / 9

Table of Contents for the Digital Edition of CONNstruction - Winter 2012

What it Takes to Produce
‘Green’ Product Enhances State Capitol
Construction Labor Supply
Lean Construction: Continuous Improvement Comes to Construction
Road Warriors
Challenges and Opportunities
Better Quality Control
Quality Assurance for Project Produced Construction Materials
AGC of Connecticut Industry Recognition Awards Dinner
2012 Diggers Mixers Fixers Golf Outing
CEUCA 2012 Annual Meeting & Fall Dinner Program
CCIA/AGC of CT Young Contractors Forum
Index to Advertisers

CONNstruction - Winter 2012