 |
||||||||
|
||||||||
 |
||||||||
 |
 |
A - Repairing Reinforced Concrete Sturctures by izo-BTS® Process System Corrosion, is the most effective factor, which determines the economic lives of the structures. Corrosion is a result of the chemical chain reactions, both in reinforcement and in the concrete. Reinforcing bars are protected by concrete with its high alkali level (pH=13). When this high alkali descends, concrete can not protect the reinforcement against corrosion and the reinforcement begins to rust. Corroded steel expands and concrete begins to crack parallel to the direction of the reinforcement. Once the concrete cracks, reinforcement is exposed to atmospheric effects and corrosion gets faster so that the economic life of the construction gets shorter and shorter. Repairing and proper strengthening can stop these chemical reactions. The main reason
for concrete corrosion or in another word carbonization is the active
calcium ions coming out of the hydration of cement. These active
ions go into reactions with atmospheric gases, water and plenty
of chemicals and create chemical complexes, which changes the body
of the concrete. This change in the body of the concrete causes
a decrease in pH level. Physically, cement loses its binding material
property and it becomes obvious to see the strength weaknesses of
the concrete elements. |
|
|||
|
|
||||
