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 16, 2012
TLC Engineering for Architecture opens Chattanooga office
TLC Engineering for Architecture provides mechanical, electrical, structural, plumbing, fire protection, communication, technology, LEED, commissioning and energy auditing services.
| Feb 16, 2012
Summit Design + Build begins build-out for Emmi Solutions in Chicago
The new headquarters will total 20,455 sq. ft. and feature a loft-style space with exposed masonry and mechanical systems, 15 foot clear ceilings, two large rooftop skylights and private offices with full glass partition walls.
| Feb 16, 2012
Highland named president of McCarthy Building Companies’ California region
Highland moved into this new role in January 2012 following a six-month transition period with Carter Chappell, the company’s former president, California region.
| Feb 16, 2012
Big-box retailers not just for DIYers
Nearly half of all contractor purchases made from stores like Home Depot and Lowe's.
| Feb 16, 2012
4.8-megawatt solar power system completed at Jersey Gardens Mall
Solar array among the largest rooftop systems in North America.
| Feb 15, 2012
Fourth-generation Ryan to lead Ryan Companies AE team
Ryan leads a team of eight architects, four civil engineers, two landscape architects and two virtual building specialists in their efforts to realize their customer’s vision and needs through Ryan’s integrated project delivery system.
| Feb 15, 2012
NAHB sees gradual improvement in multifamily sales for boomers
However, since the conditions of the current overall housing market are limiting their ability to sell their existing homes, this market is not recovering as quickly as might have been expected.
| Feb 15, 2012
Skanska secures $87M contract for subway project
The construction value of the project is $261.9 M. Skanska will include its full share, $87 M, in the bookings for Skanska USA Civil for the first quarter 2012.
| Feb 15, 2012
Code allowance offers retailers and commercial building owners increased energy savings and reduced construction costs
Specifying air curtains as energy-saving, cost-cutting alternatives to vestibules in 3,000-square-foot buildings and larger has been a recent trend among consulting engineers and architects.
| Feb 15, 2012
Englewood Construction announces new projects with Destination Maternity, American Girl
Englewood’s newest project for Wisconsin-based doll retailer American Girl, the company will combine four vacant storefronts into one large 15,000 square-foot retail space for American Girl.
