A defend from radiations

The growing use of natural or artificial (radioisotopes) radioactive elements in medicine, and of industrial nuclear techniques, brought up the need for the creation of completely insulated environments, in order to prevent harmful radiations from spreading. Men have managed to study and produce buildings, concrete and plasters that do not allow radiations to go through. The inerts that are used to produce these cement agglomerates are made of special granulates obtained through barita fragmentation (BaSO4). Barita is quite a common mineral that contains barium (Ba), an element that is able to prevent nuclear radiations from spreading. When the binder needs to have a particular mechanical resistance, a corundum granulate (Al2O3) is used as a supplementary inert, since its hardness is highly suitable for the desired objective.

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  • 16 July 2013

    Van Allen belts

    ...and the spectacular phenomenon of polar auroras

  • 8 November 2013

    Magnets and superconductors

    Which one of us has not played at attracting small pieces of iron with a magnet?

  • 10 January 2012

    Shale gas

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