sedimentary (anthropogenic)
Concrete Fragment
Hardened Portland cement and mineral aggregate
Hardness: 3-7 Mohs (variable), Color: Grey, mottled white and tan, Luster: Dull/Earthy, Crystal Structure: Amorphous and crystalline mix, Specific Gravity: 2.2-2.5
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Physical properties
Hardness: 3-7 Mohs (variable), Color: Grey, mottled white and tan, Luster: Dull/Earthy, Crystal Structure: Amorphous and crystalline mix, Specific Gravity: 2.2-2.5
Formation & geological history
Man-made construction material formed by the chemical reaction of cement and water (hydration) which binds aggregates like sand and stone together. Modern era.
Uses & applications
Used universally in civil engineering, road construction, residential buildings, and infrastructure.
Geological facts
Concrete is the most widely used man-made material in the world. It actually gains strength over decades as it continues to hydrate and carbonatize.
Field identification & locations
Identified by its heterogeneous texture containing distinct rounded or crushed rock fragments embedded in a dull grey matrix. Typically found near demolition sites or urban areas.
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