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Cement is a substance that surrounds us every day in the city and suburbs, and along with asphalt, it forms the basis for most of our urban developments. But have you ever considered how it’s made? No, we’re not talking about driving to the local hardware store, buying a bag, and adding water. If you needed to make your own cement from scratch, how would you do it?
In his latest video, the Aussie survival instructor at Primitive Technology shows how to make improvised cement from natural wood ash. He begins by burning dry bark in a clay kiln design he demonstrated in a previous video — you can watch that here. Once the bark was fully combusted and the fire died out, a pile of dry ash was left at the base of the kiln.
