concrete
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Amazing Foam Raises Heavy Concrete Slabs As If It Was A Hydraulic Jack
Video: Watching this foam — made of high-density polyurethane — raise heavy concrete slabs so easily seems like magic to me. The system, called PolyLEVEL, it’s applied drilling a hole in the concrete and sticking the foam into it. The foam expands under the concrete pushing it up as if it was a hydraulic jack.
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Sand Thieves Are Destroying The World’s Beaches To Make Concrete
Sand — humble, measly, regular old sand — is a hot commodity these days. As construction booms in Asia and the Middle East gulp up billions of tons of sand each year, beaches thousands of miles away are getting robbed and turned into rocky, pockmarked versions of their former selves.
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Advanced Concrete Could Last More Than A Century Without Maintenance
A new water-repellant concrete impregnated with tiny superstrong fibres promises to leave roads and bridges free of major cracks for up to 120 years.
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Concrete-Printing Bees And Other Living 3D Printers
Our collaborative project with GE that looked at 3D printing this week would only be partially complete without a look at the use of animals as living 3D printers. They are sentient printheads, we might say: biological sources of material, whether it’s silk and honey or, as we’l see below, plastic and even concrete.