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Requirements for deformations are found in US-standard product specifications for steel bar reinforcing, such as ASTM A615 and ASTM A706, and dictate lug spacing and height. Fibre-reinforced plastic rebar is also used in high-corrosion environments.
ASTM uses the awkward title of "Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement" (ASTM A615 / A615M), and doesn't use the terms "reinforcement bar" or "reinforcing bar" anywhere in the abstract on their Web site.
Initiation and propagation periods of steel rebar corrosion in a reinforced concrete structure (Tutti diagram). [2] [3] Initially, the chemical reactions that normally occur in the cement paste, generate an alkaline environment, bringing the solution in the cement paste pores to pH values around 13. In these conditions, passivation of steel ...
Fiber reinforcement is most often used to supplement or partially replace primary rebar, and in some cases it can be designed to fully replace rebar. [ 41 ] Steel is the strongest commonly available fiber, [ citation needed ] and comes in different lengths (30 to 80 mm in Europe) and shapes (end-hooks).
4 Hard drawn steel wire for concrete reinforcement. IS 1566 – 1982 5 Method for Tensile testing of Steel products IS 1608 – 1972 6 Code of practice for bending & fixing of bars for concrete reinforcement IS 2502 - 1963 (I) Pre cast R.C.C. Pipes; 1 Specifications for pre cast concrete pipes. IS 458 – 1988 2 Methods of Tests for concrete pipes.
The advantage of pipe and rebar is that their round shape allows continuous linear application over the exterior surface, while the parts are moved in a conveyor through the powder application booth, ensuring high throughput. On fittings, etc., the coating is applied by manual spray guns.