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
Sponsored | Architects | Nov 16, 2017
Growing your AEC firm through an exceptional client experience
Many small AEC firms don’t feel they have the time to focus and create clear marketing messages.
Multifamily Housing | Nov 15, 2017
6 noteworthy multifamily developments: artists housing, tech lofts, resort-style senior living
These recently completed projects represent emerging trends and design innovations in the multifamily sector.
Architects | Nov 9, 2017
AECOM and Van Alen Institute announce four Urban SOS® 2017 finalists with bold ideas for creating more equitable cities
Multidisciplinary student teams were challenged to redefine the traditional “hour city” radius, providing broader access to opportunity.
Multifamily Housing | Nov 8, 2017
No place like home: LA’s The Six provides permanent supportive housing for veterans
The 52-unit development gives hope and dignity to homeless or disabled veterans and others in need.
Healthcare Facilities | Nov 6, 2017
Design isn’t enough to foster collaboration in healthcare and research spaces
A new Perkins Eastman white paper finds limited employee interaction at NYU Winthrop Hospital, a year after it opened.
Architects | Nov 6, 2017
How to start a negotiation: Begin as you mean to continue
How you start a negotiation often will determine where you end up, writes negotiation and mediation expert Brenda Radmacher.
Giants 400 | Nov 3, 2017
Top 25 military architecture firms
Jacobs, Michael Baker Intl., and HDR top BD+C’s ranking of the nation’s largest military sector architecture and AE firms, as reported in the 2017 Giants 300 Report.
Engineers | Nov 2, 2017
CannonDesign expands its presence in Colorado with BWG acquisition
Future mergers could be in the offing.
Giants 400 | Nov 1, 2017
Top 35 industrial architecture firms
Jacobs, Stantec, and BRPH top BD+C’s ranking of the nation’s largest industrial sector architecture and AE firms, as reported in the 2017 Giants 300 Report.
K-12 Schools | Oct 31, 2017
Exploring empathy in architecture: Put yourself in your student’s shoes
People are enigmatic and inherently complex, which can make it difficult to design for a larger population.