Anhui Quzhou prestressed plastic corrugated pipe procurement hotline 15933187015

内径：

50mm

As the pore-forming material of the prestressed post-tensioning method, bellows are an important part of the prestressed system. For a long time, metal bellows have been used as pore-forming materials in prestressed projects. In order to overcome the problem of poor sealing, easy damage, corrosion and high friction of metal bellows, Disadvantages, but also to provide an additional anti-corrosion barrier for the prestressed tendons, it is recommended to use plastic corrugated pipes made of polyethylene or polypropylene as a revolutionary product with bonded post-tensioning to increase the life of the structure
I< br/> The raw material of the plastic corrugated pipe supplied by the company has corrosion resistance far better than that of metal. It is not afraid of acid and alkali corrosion. It does not corrode itself and can effectively protect the prestressed tendons from corrosion. Stressed structures are subject to severe external influences, such as deicing salt or salt water. When post-tensioned members leak due to micro-cracks due to the collapse of the waterproof layer and blockage or failure of drainage facilities, the prestressed tendons may be corroded. Prestressed in the Construction Guide The grouting of tendons points out that metal pipes do not have permanent anti-corrosion capabilities and are not sufficient to resist water leakage and reaching the slurry and that plastic corrugated pipes for prestressed tendons can provide a barrier protection for prestressed tendons that is far superior to metal corrugated pipes. , can prevent harmful substances from penetrating the pipeline and contaminating it, thus ensuring better durability of the post-tensioned prestressed structure.
Under the same conditions, the friction coefficient of the reserved holes of the plastic bellows is significantly smaller than the friction coefficient of the reserved holes of the metal bellows, which reduces the friction loss of the prestressed force during the tensioning process. Similarly, the friction of the plastic bellows The coefficient is taken and the friction coefficient of the metal bellows is takenbr/> The plastic bellows has high strength and stiffness, is not afraid of being stepped on, and is not easily punctured by the vibrator. Its sealing performance and impermeability are higher than those of the metal bellows, making it more suitable. Used in vacuum grouting
Plastic corrugated pipes are non-conductive and can prevent stray current corrosion, while metal is a good conductor of electricity
Plastic corrugated pipes have better fatigue resistance and can greatly improve the fatigue resistance of components
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