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Rebar (short for reinforcement bar or reinforcing bar), known when massed as reinforcing steel or steel reinforcement, [1] is a tension device added to concrete to form reinforced concrete and reinforced masonry structures to strengthen and aid the concrete under tension.
In 1996, German university students created two concrete canoes using textile reinforcement. One boat utilized alkali-resistant glass as its textile reinforcement. To manufacture the glass in a fabric, a process called Malimo-technique was used to keep the glass in one continuous yarn, such that it could be used to make the fabric. The other ...
The reinforcement in a RC structure, such as a steel bar, has to undergo the same strain or deformation as the surrounding concrete in order to prevent discontinuity, slip or separation of the two materials under load. Maintaining composite action requires transfer of load between the concrete and steel.
Compared to other composite materials used in seismic retrofitting such as fibre-reinforced polymers (FRP), [5] the fibre sheets are replaced by open-grid textiles and the epoxy resin is replaced by mortar. The synergy between the materials is mainly achieved due to a mechanical interlock forming between the textile layers and the mortar.
A carpet typically consists of two layers of backing (usually fabric from polypropylene tape yarns), joined by CaCO 3 filled styrene-butadiene latex rubber (SBR), and face fibers (majority being nylon 6 and nylon 66 textured yarns). Such nylon and polypropylene fibers can be used for concrete reinforcement.
The fibres provide reinforcement for the matrix and other useful functions in fibre-reinforced composite materials. Glass fibres can be incorporated into a matrix either in continuous or discontinuous (chopped) lengths. Durability was poor with the original type of glass fibres since the alkalinity of cement reacts with its silica.
The thickest fiber is used for pultrusion, geogrid, unidirectional fabric, multiaxial fabric production and in form of chopped strand for concrete reinforcement. One of the most prospective applications for continuous basalt fiber and the most modern trend at the moment is production of basalt rebar that more and more substitutes traditional ...
The sheet-based formwork with V-shaped rails keeps shape in one direction (vertically) but, before being reinforced with steel beams, can be bent. Multiple sheets can be fixed together in same manner fences made of iron "sheets" can be. A circle can be made from a single sheet of "21" formwork, allowing cylindrical columns to be poured.