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This article explores the significance of Portland cement, which accounts for over 95% of cement production in the U.S. We delve into the characteristics that make this cement hard, rough, and durable. Additionally, we discuss aluminum—often not found naturally, it emerges as a silvery-white metal that can be remarkably light yet strong. Understanding these materials is vital for various construction and industrial applications, highlighting their unique properties and relevance in modern engineering.
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