The new concrete is strong, cheaper to make, and repurposes millions of used tires.
Making concrete uses a fairly simple recipe. A binding agent, which is usually a paste-like material called portland cement, is mixed with water and aggregates: a combination of sand, rocks, and gravel.
One way to help reduce the cost of making concrete is to replace the aggregate with other materials, including used rubber tires that have been ground up into small particles. The idea kills two birds with one stone, as it’s also a smart way to recycle the millions of worn down rubber tires removed from vehicles every year.
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