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
Codes and Standards | Aug 6, 2015
ConsensusDocs releases new CM agency contract standard agreement
For use when owner acts as the construction manager, hires a construction manager, or uses multiple prime contractors
Giants 400 | Aug 5, 2015
GIANTS 300 REPORT: Top 135 Office Sector Architecture Firms
Gensler, HOK, and Perkins+Will top BD+C's ranking of the nation's largest office sector architecture and architecture/engineering firms.
Giants 400 | Aug 5, 2015
OFFICE SECTOR GIANTS: Today’s workplace design must appeal to Millennials’ ‘activity-based’ lifestyle
Office market AEC Giants discuss the latest trends workplace design, and the state of the office construction sector.
Giants 400 | Aug 5, 2015
GIANTS 300 REPORT: Top 37 Engineering/Architecture Firms
Jacobs, AECOM, and Thornton Tomasetti head Building Design+Construction's 2015 ranking of the largest engineering/architecture firms in the United States.
Giants 400 | Aug 5, 2015
ENGINEERING GIANTS: Profits, revenue on the rise at U.S. engineering firms as economy sputters back to life
The vast majority of engineering firms are decidedly bullish on revenue growth for 2015, and profitability is nearing a six-year high, according to BD+C's 2015 Giants 300 report.
Giants 400 | Aug 4, 2015
GIANTS 300 REPORT: Top 64 Architecture/Engineering Firms
Stantec, HOK, and Callison RTKL top Building Design+Construction's 2015 ranking of the largest architecture/engineering firms in the United States.
Giants 400 | Aug 4, 2015
GIANTS 300 REPORT: Top 106 Architecture Firms
Gensler, Perkins+Will, and Kohn Pedersen Fox top Building Design+Construction's 2015 ranking of the largest architecture firms in the United States.
Giants 400 | Aug 4, 2015
ARCHITECTURE GIANTS: 21 practice management innovations from architecture Giants
Design firms have gone all out with management innovations in the last year. Check out which ones might work for your firm.
Architects | Aug 4, 2015
Frank Lloyd Wright School of Architecture closer to independent incorporation
The school is halfway to its first fundraising milestone, but is facing a major deadline at end of this month.
Industrial Facilities | Aug 3, 2015
Architect Jacques Rougerie envisions floating city to function as roving laboratory
The manta ray-shaped vessel will be completely self-sustaining, run on marine energy, and produce no waste.