On the basis of the following measures, the external protection of severely corroded parts and special parts is carried out with high structural durability.
1. Epoxy coated reinforcement
In the most seriously corroded cast-in-place pier, ring graded reinforcement is used.
The coating is easy to deform in construction. The protection mechanism of epoxy reinforcement is based on the complete isolation of the chest and the rotten, and the defects of the epoxy coating and the as cast damage of the contact layer are easy to lead to the pitting corrosion of the elastic members. Corresponding actions. Maintaining the integrity of the membrane is the key to the effectiveness of epoxy coated steel bars.
In accordance with the bridge specification, the amount of reinforcement to be coated per meter shall not exceed 25 mm.
2. The total area shall not exceed 0.1% of the reinforcement surface area.
Formulate detailed regulations and rules and regulations on storage, transportation, processing and installation of epoxy coated reinforcement, and take necessary measures to minimize damage to epoxy coating. The damaged ring test coating shall be repaired as soon as possible. The ring test coating for repair shall be carried out in the environment with the relative humidity less than 85% using the materials provided by the reinforcement manufacturer. The thickness of repair coating shall not be less than 180um. According to American media. During the process of concrete pouring and vibration, it may affect the steel with soft coating of rubber ring (80% of the damage rate occurs here)
Therefore, in the construction process, the metal vibrator should be coated with plastic or rubber, and the island group should be in direct contact with the reinforcement to reduce the collimation damage coating.
The above is the relevant content introduced by Shandong cable tray manufacturer. For more information, please visit the website: http://www.sdhangfeng.com