The Reason Why Concrete Made By The Romans More Than 2,000 Years Ago Are Stronger than the one used today?

The time period during which concrete was first invented depends on how one interprets the term “concrete.”  Ancient materials were crude cements made by crushing and burning gypsum or limestone. Lime also refers to crushed, burned limestone. When sand and water were added to these cements, they became mortar, which was a plaster-like material used […]

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