Tag Archives: Volcanic ash

On the origin of Roman concrete

You mix burnt lime, volcanic ash and sand/gravel. Then you have the famed concrete that made the Romans able to build the Pantheon cupola, or to make underwater constructions, like big harbours. And without Roman concrete, we may not have had our modern concrete, based on Portland cement, enabling us to build ever bigger, higher and deeper. But how was Roman concrete discovered? Continue reading

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