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
Multifamily Housing | May 18, 2021
Multifamily housing sector sees near record proposal activity in early 2021
The multifamily sector led all housing submarkets, and was third among all 58 submarkets tracked by PSMJ in the first quarter of 2021.
Wood | May 14, 2021
What's next for mass timber design?
An architect who has worked on some of the nation's largest and most significant mass timber construction projects shares his thoughts on the latest design trends and innovations in mass timber.
Architects | May 10, 2021
Industry icon Art Gensler dead at 85
He was credited with creating a model for the modern, growth-oriented professional services organization.
Healthcare Facilities | Apr 30, 2021
Registration and waiting: Weak points and an enduring strength
Changing how patients register and wait for appointments will enhance the healthcare industry’s ability to respond to crises.
University Buildings | Apr 29, 2021
The Weekly Show, April 29, 2021: COVID-19's impact on campus planning, and bird management strategies
This week on The Weekly show, BD+C Senior Editor John Caulfield interviews a duo of industry experts on 1) how campus planning has changed during the pandemic and 2) managing bird infestations on construction sites and completed buildings.
Architects | Apr 22, 2021
SmithGroup enters partnership to support architecture programs at three Historically Black universities
The firm is providing instructors and mentors as part of a broader effort to expand the industry’s diversity.
Multifamily Housing | Apr 22, 2021
The Weekly Show, Apr 22, 2021: COVID-19's impact on multifamily amenities
This week on The Weekly show, BD+C's Robert Cassidy speaks with three multifamily design experts about the impact of COVID-19 on apartment and condo amenities, based on the 2021 Multifamily Amenities Survey.
Adaptive Reuse | Apr 15, 2021
The Weekly Show, Apr 15, 2021: The ins and outs of adaptive reuse, and sensors for real-time construction monitoring
This week on The Weekly show, BD+C editors speak with AEC industry leaders from PBDW Architects and Wohlsen Construction about what makes adaptive reuse projects successful, and sensors for real-time monitoring of concrete construction.
Architects | Apr 14, 2021
HASTINGS elevates Sara Atherton and Derek Schmidt to Principal
Hastings Architecture promotes Sara Atherton and Derek Schmidt to Principal.