What is a common example of a composite material?

A common example of a composite material is reinforced concrete. Composite materials are made from two or more constituent materials that possess different physical or chemical properties. When combined, these materials create a material with enhanced properties.

In the case of reinforced concrete, it combines concrete, which is strong in compression but weak in tension, with steel reinforcement bars (rebar), which are strong in tension. This combination results in a material that can withstand both compressive and tensile forces, making it ideal for use in construction where strength and durability are vital.

Steel, wood, and glass are not classified as composite materials by themselves. Steel is a pure alloy, wood is a natural material composed of cellulose fibers, and glass is typically a single material made from silica. In contrast, reinforced concrete exemplifies the advantages of using a composite material to improve performance in applications requiring strength and resistance to various forces.