Why Roman concrete still stands strong while modern version decays | Science | The Guardian
'Jackson has previously argued Roman concrete should be used to build the seawall for the Swansea lagoon.“There’s many applications but further work is needed to create those mixes. '
'These minerals, say the authors, helped to reinforce the concrete, preventing cracks from growing, with structures becoming stronger over time as the minerals grew. '
'Writing in the journal American Mineralogist, Jackson and colleagues describe how they analysed concrete cores from Roman piers, breakwaters and harbours. '
'The Roman recipe – a mix of volcanic ash, lime (calcium oxide), seawater and lumps of volcanic rock – held together piers, breakwaters and harbours. '
'By contrast, modern concrete, based on Portland cement, is not supposed to change after it hardens – meaning any reactions with the material cause damage. '
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https://archive.is/fttY4 | :
'Jackson has previously argued Roman concrete should be used to build the seawall for the Swansea lagoon.“There’s many applications but further work is needed to create those mixes. '
'These minerals, say the authors, helped to reinforce the concrete, preventing cracks from growing, with structures becoming stronger over time as the minerals grew. '
'Writing in the journal American Mineralogist, Jackson and colleagues describe how they analysed concrete cores from Roman piers, breakwaters and harbours. '
'The Roman recipe – a mix of volcanic ash, lime (calcium oxide), seawater and lumps of volcanic rock – held together piers, breakwaters and harbours. '
'By contrast, modern concrete, based on Portland cement, is not supposed to change after it hardens – meaning any reactions with the material cause damage. '
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