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 8, 2012
Mega-malls expanding internationally
Historically, malls have always been the icons of America – the first mall ever was built in Minneapolis in 1956.
| Feb 8, 2012
World’s tallest solar PV-installation
The solar array is at the elevation of 737 feet, making the building the tallest in the world with a solar PV-installation on its roof.
| Feb 7, 2012
AIA introduces seven new contract documents to Documents-On-Demand service??
AIA Contract Documents are widely-used standard form contracts among the building industry to support construction and design projects.
| Feb 7, 2012
Data center construction boom driven by healthcare and technology
The study includes insight and perspective regarding current investment plans of stakeholders, potential challenges to the data center boom, data center efficiency levels, the impact of new designs and technologies, and delivery methods.
| Feb 7, 2012
Kawneer and Traco combine portfolios
Portfolio includes curtain wall systems, windows, entrances and framing systems.
| Feb 7, 2012
Lubbers promoted to creative director at Wight & Co.
Lubbers has been instrumental in many recent high profile Wight projects, including the College of DuPage Student Resource Center, Seaton Computing Center, The Adler Planetarium Sky Theater transformation and UNO Charter Schools.
| Feb 7, 2012
Shepley Bulfinch opens San Francisco office
This expansion establishes a physical presence that builds on a portfolio of work for institutional clients on the West Coast, dating to the development of the original Stanford University campus in 1891
| Feb 7, 2012
Thornton Tomasetti opens new office in Denver
The firm, which now has 25 offices internationally, opened the new office to better serve current and potential clients in the western Central region and Mountain States.
| Feb 6, 2012
Slight increase in nonres construction spending expected in 2012, growth projected for 2013
Commercial sector expected to lead real estate recovery.