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The document discusses the history and chemistry of Portland cement. It originated in the 18th century as an improvement on earlier lime mortars used by ancient Egyptians and Romans. Modern Portland cement is created by pulverizing materials containing calcium, silicon, aluminum and iron and heating them to produce clinker which is then finely ground. There are five types of Portland cement that vary in properties like heat release and sulfate resistance for different construction applications. The cement i
- Author
- Tamara Hamilton
- Language
- EN