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
| Jul 18, 2014
Top Construction Management Firms [2014 Giants 300 Report]
Jacobs, Barton Malow, Hill International top Building Design+Construction's 2014 ranking of the largest construction management and project management firms in the United States.
| Jul 18, 2014
Top Contractors [2014 Giants 300 Report]
Turner, Whiting-Turner, Skanska top Building Design+Construction's 2014 ranking of the largest contractors in the United States.
| Jul 18, 2014
Engineering firms look to bolster growth through new services, technology [2014 Giants 300 Report]
Following solid revenue growth in 2013, the majority of U.S.-based engineering and engineering/architecture firms expect more of the same this year, according to BD+C’s 2014 Giants 300 report.
| Jul 18, 2014
Top Engineering/Architecture Firms [2014 Giants 300 Report]
Jacobs, AECOM, Parsons Brinckerhoff top Building Design+Construction's 2014 ranking of the largest engineering/architecture firms in the United States.
| Jul 18, 2014
Top Engineering Firms [2014 Giants 300 Report]
Fluor, Arup, Day & Zimmermann top Building Design+Construction's 2014 ranking of the largest engineering firms in the United States.
| Jul 18, 2014
Top Architecture Firms [2014 Giants 300 Report]
Gensler, Perkins+Will, NBBJ top Building Design+Construction's 2014 ranking of the largest architecture firms in the United States.
| Jul 18, 2014
Top Architecture/Engineering Firms [2014 Giants 300 Report]
Stantec, HOK, and Skidmore, Owings & Merrill top Building Design+Construction's 2014 ranking of the largest architecture/engineering firms in the United States.
| Jul 18, 2014
2014 Giants 300 Report
Building Design+Construction magazine's annual ranking the nation's largest architecture, engineering, and construction firms in the U.S.
| Jul 17, 2014
A new, vibrant waterfront for the capital
Plans to improve Washington D.C.'s Potomac River waterfront by Maine Ave. have been discussed for years. Finally, The Wharf has started its first phase of construction.
| Jul 17, 2014
A harmful trade-off many U.S. green buildings make
The Urban Green Council addresses a concern that many "green" buildings in the U.S. have: poor insulation.