For decades, scientists have sought to unravel the secret behind Roman concrete's longevity. According to Science Alert, ...

Mortar consisted of small gravel and coarse sand mixed together with hot lime and water ... air in the mix by adding animal blood. That process created small air bubbles in concrete, making ...

"Primitive Technology is all about building in the wild from scratch, using no modern tools or materials. Join me on How Satisfying? as we explore the art of crafting shelter, tools, and fire using ...