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
| Feb 21, 2013
AIA College of Fellows awards 2013 Latrobe Prize for 'The City of 7 Billion'
The American Institute of Architects (AIA) College of Fellows has awarded the 2013 Latrobe Prize of $100,000 for the proposal, “The City of 7 Billion.”
| Feb 21, 2013
BD+C's 2011 White Paper: Zero and Net-Zero Energy Buildings + Homes
We submit our eighth White Paper on Sustainability in the hope that it will inspire architects, engineers, contractors, building owners, developers, building product manufacturers, environmentalists, policymakers, government officials, corporate executives, officeholders, and the public to foster the development of net-zero energy buildings and homes.
| Feb 21, 2013
BD+C's 2008 White Paper: Green Buildings + Climate Change
In this White Paper, we provide concrete ways in which AEC professionals can have a positive role in addressing climate change.
| Feb 21, 2013
Holl videos discuss design features of Chengdu ' Porosity Block' project
Architect Steven Holl has released two short films describing the development of Sliced Porosity Block in Chengdu, China.
| Feb 21, 2013
Construction team chosen for world's tallest building in Jeddah, Saudi Arabia
Construction team chosen for world's tallest building in Jeddah, Saudi Arabia.
| Feb 21, 2013
Stephen C. Wright joins Leo A Daly as Managing Principal in D.C.
International architecture, planning, engineering, interior design and program management firm LEO A DALY welcomes Stephen C. Wright, AIA, as the new managing principal of the Washington, D.C., office. Wright will oversee the D.C. team in executing federal, local government, private and non-profit projects and pursuing new business opportunities in markets including aviation, corporate and commercial, higher education, hospitality and institutional facilities.
| Feb 20, 2013
Architecture Billings Index sees strongest growth since 2007
The American Institute of Architects reported the January ABI score was 54.2, up sharply from 51.2 in December. This score reflects a strong increase in demand for design services.
| Feb 19, 2013
'Pop-up' proposal would create movable cultural venue for NYC
The Culture Shed, a proposed 170,000-sf project for New York City's Hudson Yards development, could be the ultimate in "pop-up" facilities.