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
| Nov 15, 2011
Miller joins Perkins Eastman as regional manager, Middle East and Northern Africa
Miller joins Perkins Eastman with more than 48 years of experience in architecture, design management, and construction administration for planning and infrastructure.
| Nov 14, 2011
Summit Design+Build selected at GC for new Office Concepts headquarters
The new headquarters will include 17,000 sf of office space and 15,000 sf of warehouse and feature 24 ft ceilings, an open floor plan, two conference rooms and one training room and will feature sustainable finishes throughout.
| Nov 14, 2011
Griffin Electric completes electrical work at Cary Arts Center
The Griffin Electric team was responsible for replacing the previous electrical service on-site with a 1000A, 480/277V service and providing electrical feeds for a new fire pump chiller, six air-handlers and two elevators.
| Nov 14, 2011
303 East 33rd Street building achieves LEED-NC
The 165,000 sf 12-story residential building is the first green development to be LEED certified in the Murray Hill neighborhood of Manhattan.
| Nov 14, 2011
VanSumeren appointed to Traco general manager
VanSumeren will draw on his more than 20 years of experience in manufacturing management and engineering to deliver operational and service excellence and drive profitable growth for Traco.
| Nov 11, 2011
By the Numbers
What do ‘46.9,’ ‘886.2,’ and ‘171,271’ mean to you? Check here for the answer.
| Nov 11, 2011
Streamline Design-build with BIM
How construction manager Barton Malow utilized BIM and design-build to deliver a quick turnaround for Georgia Tech’s new practice facility.
| Nov 11, 2011
AIA: Engineered Brick + Masonry for Commercial Buildings
Earn 1.0 AIA/CES learning units by studying this article and successfully completing the online exam.
