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
| Jun 11, 2012
Genivar and WSP Group join forces
Genivar concurrently announces a $225 million public bought deal of subscription receipts, a $197 million private placement of subscription receipts and new credit facilities.
| Jun 11, 2012
SimplexGrinnell highlights integrated suite of web-based technologies at NFPA Expo
eservices platform uses the power of the Internet to deliver more value to customers.
| Jun 11, 2012
Reed Construction announces new hire and promotion
Reed Construction hired Augie Insalaco as a project manager and promoted Matt Mahoney from project intern to project engineer.
| Jun 11, 2012
Hill International selected as CM for Porto Arabia Towers in Qatar
The complex is a mixed-use development featuring both residential and commercial properties.
| Jun 8, 2012
Living Building Challenge wins the 2012 Buckminster Fuller Challenge
The Living Building Challenge was chosen from a pool of 122 of entries from around the world.
| Jun 8, 2012
Nauset Construction completing sustainable dorm for Brooks School
Student input on green elements provides learning experience.
| Jun 8, 2012
Skyline Construction names Millitello president
Millitello is a 31-year veteran who has overseen the construction of campus-size projects.
| Jun 8, 2012
Thornton Tomasetti/Fore Solutions provides consulting for renovation at Tufts School of Dental Medicine
Project receives LEED Gold certification.