Dec-01-17
The structural design of sea urchin spines has inspired an exceptionally fracture resistant concrete.
Sea urchin spines are built on a nanoscale ‘brick and mortar’ design, with layers of brittle calcite blocks separated by softer layers that absorb energy to help reduce cracking.
With this in mind, the teams from the University of Konstanz and University of Stuttgart replicated the brick and mortar design on the nanoscale by first finding a material that would bond only with cement nanoparticles. Once that material was identified, the team used an ion beam to cut a bar thee micrometers long from the nanostructured cement. The microstructure will return to its original position after bending, with a fracture resistance similar of steel, and could lead to new types of cement up to 100 times stronger than current versions.
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NEWATLAS.COM]
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THEENGINEER.CO.UK]
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