Properties of self consolidating concrete for prestressed members
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As a French gardener, Monier patented reinforced concrete flower pots in 1867, before proceeding to build reinforced concrete water tanks and bridges. Ransome, an English engineer and architect who worked in the United States, made a very significant contribution to the development of reinforcing bars in concrete construction. Turner was designing his "mushroom system" of reinforced concrete floor slabs with smooth round rods and Julius Kahn (inventor) was experimenting with an innovative rolled diamond-shaped rebar with flat-plate flanges angled upwards at 45° (patented in 1902).
Concrete is strong under compression, but has weak tensile strength.
The most common type of rebar is carbon steel, typically consisting of hot-rolled round bars with deformation patterns.
Other readily available types include stainless steel, and composite sections made of glass fiber, carbon fiber, or basalt fiber.
Normally the concrete cover is able to provide a p H value higher than 12 avoiding the corrosion reaction.
Too little concrete cover can compromise this guard through carbonation from the surface, and salt penetration.