How Has Roman Concrete Lasted for Millennia? 1,900-Year-Old Latrine Offers Clues

3 hours ago

Roman concrete has lasted for millennia due to chemical processes like carbonation, which helps seal cracks and enhances durability over time.
A study of a 1,900-year-old latrine at Hadrian's Villa revealed that calcite, formed from atmospheric carbon dioxide reacting with calcium compounds, acts as a primary binding agent to fill pores and fractures.
The research builds on prior findings about self-healing properties in Roman concrete, suggesting carbonates play a dynamic and fundamental role in its longevity.
Understanding Roman concrete could lead to more sustainable modern building materials, reducing the environmental impact of concrete production, which accounts for about 8% of global CO2 emissions.

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