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
Architects | Sep 6, 2017
Top 110 university architecture firms
Perkins+Will, Gensler, and CannonDesign top BD+C’s ranking of the nation’s largest university sector architecture and AE firms, as reported in the 2017 Giants 300 Report.
Contractors | Sep 6, 2017
Following the money: G702 progress payment certifications
There is no single method of calculating progress payments, but the most common formula is the percentage of completion applied to the total contract price, less a retainage which is held by the owner until final acceptance of the project.
Multifamily Housing | Sep 5, 2017
Free WiFi, meeting rooms most popular business services amenities in multifamily developments
Complimentary, building-wide WiFi is more or less a given for marketing purposes in the multifamily arena.
Architects | Sep 1, 2017
5 reasons why AEC firms need to focus on employer branding
Not to be confused with the branding of your firm overall, your employer brand is defined by your reputation as a workplace.
Healthcare Facilities | Sep 1, 2017
Caring for caregivers
Many healthcare organizations are increasingly focused on designing amenities, policies, and workplaces to better support their clinicians, health providers, and administrators.
Architects | Aug 31, 2017
How Instagram is changing the design industry
The digital and physical worlds are colliding. How will social media platforms influence the way we design spaces?
Mixed-Use | Aug 30, 2017
A 50-acre waterfront redevelopment gets under way in Tampa
Nine architects, three interior designers, and nine contractors are involved in this $3 billion project.
AEC Tech | Aug 25, 2017
Software cornucopia: Jacksonville Jaguars’ new practice facility showcases the power of computational design
The project team employed Revit, Rhino, Grasshopper, Kangaroo, and a host of other software applications to design and build this uber-complex sports and entertainment facility.
Multifamily Housing | Aug 24, 2017
Storage units, lounges most popular indoor and outdoor amenities in multifamily developments
Tenants and condo owners crave extra space for their stuff. Most developers are happy to oblige.
Green | Aug 24, 2017
Business case for WELL still developing after first generation office fitouts completed
The costs ranged from 50 cents to $4 per sf, according to a ULI report.