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
Hotel Facilities | Apr 12, 2017
Hotels embrace place
Today’s hospitality environments emphasize unique, localized experiences to attract and engage guests.
Green | Apr 11, 2017
Passivhaus for high-rises? Research demonstrates viability of the stringent standards for tall residential buildings
A new study conducted by FXFOWLE shows that Building Teams can meet stringent Passivhaus performance standards with minimal impact to first cost and aesthetics.
Curtain Wall | Apr 11, 2017
Masters of geometry
Three firms that specialize in façades that curve, twist, and turn see themselves as artisans of the unthinkable.
Office Buildings | Apr 10, 2017
Innovation lab makes developing eye care solutions a collaborative affair
The Shop East innovation lab presents 13,500 sf of workspace across two floors with an emphasis on collaboration.
Architects | Apr 10, 2017
New Bjarke Ingels documentary gives a peek behind the curtain
The movie takes a slightly darker tone than previous projects chronicling the starchitect’s rise to prominence.
Architects | Apr 4, 2017
Architect Howard Elkus dies at 78
Cofounder of Elkus Manfredi Architects, his career spanned five decades, and included a spectrum of major design projects.
Building Team | Apr 4, 2017
Dispelling five myths about post-occupancy evaluations
Many assume that post-occupancy (POE) is a clearly-defined term and concept, but the meaning of POE in practice remains wildly inconsistent.
Structural Materials | Apr 3, 2017
Best of structural steel construction: 4WTC, Fulton Center, Pterodactyl win AISC IDEAS2 Awards
The annual awards program, sponsored by the American Institute of Steel Construction, honors the best in structural steel design and construction.
Green | Mar 29, 2017
Copenhagen Zoo and BIG unveil yin yang-shaped panda habitat
The new habitat will sit between two existing buildings, including the Elephant House designed by Norman Foster.
Architects | Mar 28, 2017
A restroom for everyone
Restroom access affects everyone: people with medical needs or disabilities, caretakers, transgender people, parents with children of the opposite gender, and really anyone with issues or needs around privacy.