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DIY concrete slab - How to form and pour it yourself

In this video, learn how to create a large concrete slab from start to finish. CHAPTERS: 00:00 - Clearing the Area 01:30 - ...
Smithsonian Magazine

How Has Roman Concrete Lasted for Millennia? A 1,900-Year-Old Latrine Offers New Clues About the Material’s Impressive Durability

A chemical process called carbonation, which helps seal cracks, could help explain why many ancient Roman structures are ...