The anti-corrosion of the anchor bolt is a big job, and it needs to pay attention to the method. Let's take a look at the Three methods of anti-corrosion of rock bolts.
When the permanent anchor rod adopts the exposed head, it must be coated with anti-corrosion materials such as asphalt, and then sealed with concrete. The thickness of the exposed steel plate and the protective layer of the anchor should not be less than 25mm.
For permanent anchor rods in general corrosive environments, the rod body in the anchoring section of the anchor rod can be sealed with mortar or cement for anti-corrosion, but there must be a 20mm thick protective layer around the rod body.
For permanent bolts in severe corrosive environments, the inner rod body in the anchoring section of the bolt is covered with bellows, the pores in the pipe are filled with cement slurry or epoxy resin, and the thickness of the protective layer around the casing shall not be less than 10mm.
Temporary bolt anchoring section rod body should be sealed with cement slurry for anti-corrosion, and the thickness of the protective layer around the rod body should not be less than 10mm.
The surface of the rod body in the free section of the permanent anchor rod is coated with anti-corrosion paint or lubricating oil, then wrapped with plastic cloth, and then coated with a layer of lubricating oil on the plastic cloth surface, and finally installed in the plastic casing to form a double-layer anti-corrosion.
The free section of the temporary bolt can be coated with anti-corrosion paint or lubricating oil, and then wrapped with plastic cloth as simple anti-corrosion measures.
Hebei Jiufu Industrial and Mining Parts Co., Ltd. is a manufacturer specializing in the supply of supporting materials for coal mining, construction engineering and large-scale concrete projects. It mainly produces self-drilling bolts, friction bolts, glass fiber reinforced plastic solid bolts
