Engineers at Sheffield University have developed a technique for removing fibers of old tires and added to a concrete mix, improving the resistance of the concrete to fire.
Under pressure from intense heat, concrete sounds violently on its surface layers – an act called prey. When concrete losses, the structural integrity of a building or bridge can be compromised.
Most major construction and infrastructure projects use a concrete mix based on human polypropylene fibers. The fibers help prevent stopping.
Sheffield researchers found that there was more eco-friendly approach to fire concrete. Rather than relying on fibers produced by raw materials, scientists developed a new technique for removing fibers from old tires.
"The use of waste materials in this way is less expensive, and better for the planet," said Shan-Shan Huang, senior lecturer in structural engineering at Sheffield, in a news release.
Concrete splits because fluid in the material expands and causes pressure to be placed until the outer layers of the concrete break and explode. When fibers have been incorporated, they melted with intense heat and create small channels that can still escape the moisture.
"Because the fibers are so small, they do not affect the strength or strength of the concrete," said Huang. "Melting is only their work when heat becomes intense. Concrete is a busy material, so it will break relatively easily without having these fibers to help reduce the pressure within the concrete. "
Turbine makers use fibers to reinforce rubber strength and improve endurance and tire performance. Huang and his colleagues developed a method for removing these fibers, turning them into strands and mixing them to a concrete mix.
Scientists detailed their new technique this week in the Fire Technology magazine.
Sheffield researchers are currently working with Twincon, a local construction company, to test the different anti-fire benefits of different tires fiber concentrations in a variety of types of concrete.
Space Technology News – Applications and Research
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