Scrap tires could gain a new purpose as ingredients for construction materials, thanks to research at Missouri University of Science and Technology.
Discarded tires are a big problem. Landfills are teeming with them and they can harbor disease-carrying mosquitos and rodents. Stockpiles of old tires also burn easily — creating fires that can quickly get out of control and may burn for months or even years.
But the longevity and resilience of scrap tires also makes them ideal for other uses.
Dr. Mohamed A. El Gawady, a researcher at Missouri S&T, is currently testing new masonry blocks made with ground tires.
“Rubber has a lot of benefits in addition to its sustainability,” says El Gawady, associate professor of civil, architectural and environmental engineering. “It’s very durable and provides good insulation. Among their many potential benefits, these new blocks could cut heating bills by 50 percent.”
ElGawady has been working with Midwest Block and Brick, a Jefferson City, Mo.-based company, to create the blocks, which are made from sand and scrap tires ground to fine particles.
These rubber-added blocks, called rubberized blocks, were constructed with a variety of ratios of sand to rubber particles before coming up with the right balance.
“The rubber makes the blocks a bit weaker, so after testing various percentages, we now only replace about 20 percent of the sand with rubber, so the blocks retain their strength,” ElGawady says.
He and his students use a compression machine to test and compare the strength of prisms built with the rubberized blocks to conventional concrete masonry blocks.
Both rubberized and conventional blocks are being tested in an environmental chamber at Missouri S&T. In the chamber, the blocks undergo cycles of extreme temperatures and humidity levels, simulating different weather conditions. The rubberized blocks are also tested under cyclic compression loads simulating earthquake loads.
“Construction with these new blocks could improve a building’s resiliency during an earthquake by acting as shock absorbers,” says ElGawady.
Related Stories
| Sep 22, 2010
Michael Van Valkenburg Assoc. wins St. Louis Gateway Arch design competition
Landscape architect Michael Van Valkenburgh and a multidisciplinary team of experts in “urban renewal, preservation, commemoration, social connections and ecological restoration” have been picked for the planning phase of The City+The Arch+The River 2015 International Design Competition.
| Sep 22, 2010
Satellier, Potential + Semac close investment deal
Satellier, a world leader in providing CAD and Building Information Modeling (BIM) outsourced services to the architecture, engineering and construction industry, announces a strategic minority investment from India-based top engineering firm Potential + Semac, ushering in the next evolution of the global architecture support industry.
| Sep 21, 2010
New BOMA-Kingsley Report Shows Compression in Utilities and Total Operating Expenses
A new report from the Building Owners and Managers Association (BOMA) International and Kingsley Associates shows that property professionals are trimming building operating expenses to stay competitive in today’s challenging marketplace. The report, which analyzes data from BOMA International’s 2010 Experience Exchange Report® (EER), revealed a $0.09 (1.1 percent) decrease in total operating expenses for U.S. private-sector buildings during 2009.
| Sep 21, 2010
Forecast: Existing buildings to earn 50% of green building certifications
A new report from Pike Research forecasts that by 2020, nearly half the green building certifications will be for existing buildings—accounting for 25 billion sf. The study, “Green Building Certification Programs,” analyzed current market and regulatory conditions related to green building certification programs, and found that green building remain robust during the recession and that certifications for existing buildings are an increasing area of focus.
| Sep 21, 2010
Middough Inc. Celebrates its 60th Anniversary
Middough Inc., a top ranking U.S. architectural, engineering and management services company, announces the celebration of its 60th anniversary, says President and CEO, Ronald R. Ledin, PE.
