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According to foreign media Cnet, concrete is an incredible material. Without it, the modern world cannot exist. But it is not perfect. It requires reinforcement to remain stable under tension and it can react negatively to heat. When the concrete structure is heated by fire, the moisture in the concrete turns into steam and causes the concrete to violently split. This phenomenon is called peeling. The spalling of the bridge weakens the structure and causes collapse.
According to a report released by New Atlas on Wednesday, scientists have found that if polypropylene fibers are added to the concrete mixture, the fibers will melt, leaving tiny passages that allow steam to escape from the concrete matrix and prevent spalling.
“Because the fibers are small, they do not affect the strength or stiffness of the concrete,” said Huang Shanshan, the lead author of a paper in the study. “When the heat becomes very strong, their only job is to melt. Concrete is A brittle material, so without these fibers helping to reduce the pressure inside the concrete, it will break relatively easily." The study was published in the journal Fire Technology on Tuesday.
But while polyethylene is the second most common thermoplastic in the world - polypropylene requires a lot of energy and resources to melt. This has led scientists to find an affordable and environmentally friendly solution to their problems. Scientists at the University of Sheffield in the United Kingdom have found that by removing old tires, they can use fibers that are usually wrapped inside the rubber of the tire to add the structure to the concrete as a substitute for the original polypropylene. They only need to find a cheap and effective way to make the fiber rubber-free, which is easier said than done.
Scientists are working with the British company Twincon to find out how to separate fibers and rubber, effectively distributing them evenly throughout the concrete mixture. They also tried to determine the exact ratio of fiber to concrete to make the most of existing materials.
Then the waste tire recycling plant produced by Yuxi Machinery can solve this problem. Yuxi Machinery Tire Recycling Machine is the entire recycling line for tire recycling. The finished tyre recycling plant is rubber powder, fiber and waste steel wire. The separation rate of fiber and rubber is as high as 99%. A good solution to the problem of rubber and fiber mixing. Yuxi Machinery's tyre recycling machine is easy to operate, high in output, free from pollution and waste gas.

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