When aggregate is mixed with dry Portland cement and water, the mixture forms a fluid slurry that is easily poured and molded into shape. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. JSTOR ( July 2022) ( Learn how and when to remove this template message)Ĭoncrete is a composite material composed of aggregate bonded together with a fluid cement that cures over time.Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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