the facility of work with concrete, it can be in a plastic state and be deposited and made to fill forms or molds of almost any practical shape is one of these factors.

Its compressive strength, like that of natural stones, is high, which makes it suitable for members primarily subject to compression, such as columns and arches.                                                                    

On the other hand, again as in natural  stones, it is a relatively brittle material whose tensile strength is low compared with its compressive strength. To offset this limitation, it was found possible, in the second half of the nineteenth century, to use steel with its high tensile strength to reinforce concrete, chiefly in those places where its low tensile strength would limit the carrying capacity of the member. The resulting combination of two materials; known as reinforced concrete and prestressed concrete, combines many of the advantages of each: the relatively low cost, good weather and fire resistance, good compressive strength, and excellent formability of concrete and the high tensile strength and much greater ductility and toughness of steel.