Carrot cement: How root vegetables and ash could make concrete more sustainable

Concrete has become our building material of choice for countless structures such as bridges, towers and dams. But it also has a huge environmental footprint mostly due to carbon dioxide emissions from the production of cement – one of its main constituents. Researchers are now experimenting with root vegetables and recycled plastic in concrete to … Read more

Notre Dame: Medieval stonemasons built vaulted ceilings to protect against fires

Medieval stonemasons knew very well what they were doing when they built ceiling vaults such as those found in Notre Dame, says gothic vault expert. Image credit - CC0

Medieval stonemasons built soaring vaulted ceilings such as those of the cathedral of Notre Dame in Paris, France, using techniques that are still not completely understood today. The challenge of restoring Notre Dame after the fire in April presents an opportunity to unravel the techniques of the time, says Professor David Wendland, chair of construction … Read more