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Modular steel frame formwork for a foundation. Rebar has been stubbed up out of the concrete slab to form the base of future columns
Modular steel frame formwork for a foundation. Rebar has been stubbed up out of the concrete slab to form the base of future columns
Timber formwork for a concrete column. Adjustable metal screw jacks both stabilize and plumb the form
Timber formwork for a concrete column. Adjustable metal screw jacks both stabilize and plumb the form
Aluminum formwork system
Aluminum formwork system
Placing a wall form. A matching form will be placed on the opposite side to create the space to pour concrete into
Placing a wall form. A matching form will be placed on the opposite side to create the space to pour concrete into
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A single concrete block, as used for construction
A single concrete block, as used for construction
Exterior of the Roman Pantheon, finished 128 AD, the largest unreinforced concrete dome in the world.
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.
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
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.