Roman seawater concrete holds the secret to cutting carbon emissions

This image shows a drill core of 2,000 year old volcanic ash-hydrated lime mortar from the ancient port of Baiae in Pozzuloi Bay, Italy.
This image shows a drill core of 2,000 year old volcanic ash-hydrated lime mortar from the ancient port of Baiae in Pozzuloi Bay, Italy.

This discovery shows how to make stronger, longer lasting concrete with far less energy. A green type of concrete like this could replace Portland concrete, which is viewed negatively by many due to its adverse environmental impact.

Read more