Reinforced concrete is concrete incorporate with steel bars. While the concrete resists compression, the rebar withstands tension of the load. Concrete can be made into almost any shapes and sizes. Without steel reinforcement, many concrete structures would not have been possible.
Steel reinforced concrete structures suffer in coastal and brackish areas due to chloride induced corrosion onto the rebar. The phenomenon weakens the structures, and reduces their load carrying capacity and durability. When steel corrodes to form rust, its volume expands 4 to 6 times causing concrete to spall. The detachment of rebar from concrete and the reduction of load bearing cross section of rebar may cause the structures to tumble down.
When high pH wet cement contacts rebar, a hydration reaction occurs with the formation of Fe(OH)2 passive film on the steel surface. As long as this film persists, the rebar does not corrode. However, depassivation of rebar may be caused by carbonation and especially by chloride attack
Reinforced concrete is concrete incorporate with steel bars. While the concrete resists compression, the rebar withstands tension of the load. Concrete can be made into almost any shapes and sizes. Without steel reinforcement, many concrete structures would not have been possible.
Steel reinforced concrete structures suffer in coastal and brackish areas due to chloride induced corrosion onto the rebar. The phenomenon weakens the structures, and reduces their load carrying capacity and durability. When steel corrodes to form rust, its volume expands 4 to 6 times causing concrete to spall. The detachment of rebar from concrete and the reduction of load bearing cross section of rebar may cause the structures to tumble down.
When high pH wet cement contacts rebar, a hydration reaction occurs with the formation of Fe(OH)2 passive film on the steel surface. As long as this film persists, the rebar does not corrode. However, depassivation of rebar may be caused by carbonation and especially by chloride attack
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