Concrete block
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A concrete block, also known as a cinder block in North American English, breeze block in British English, or concrete masonry unit, or by various other terms, is a standard-size rectangular block use
A pallet of "8-inch" concrete blocks
An interior wall of painted concrete blocks
Concrete masonry blocks
A building constructed with concrete masonry blocks, Kolkata, West Bengal, India
Concrete
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Concrete is a composite material composed of aggregate bound together with a fluid cement that cures to a solid. It is the second-most-used substance, the most widely used building material, and the m
Concrete block
…ash created as a waste product from impurities in minerals such as coal, limestone and iron-ore), also called slag. Concrete blocks are made from cast concrete (e.g. portland cement and aggregate, usually sand and fine gravel, for high-density blocks). In the western United States, where they are easily…
A single concrete block, as used for construction
Exterior of the Roman Pantheon, finished 128 AD, the largest unreinforced concrete dome in the world.
Interior of the Pantheon dome, seen from beneath. The concrete for the coffered dome was laid on moulds, mounted on temporary scaffolding.
Opus caementicium exposed in a characteristic Roman arch. In contrast to modern concrete structures, the concrete used in Roman buildings was usually covered with brick or stone.