Advantages

When the pore-forming material be damaged, the slurry is the last safety net of prestressed prestressed steel in concrete structures. Plastic corrugated pipe is a new material into the hole, compared with metal bellows, it has the following advantages.SBG (B) the raw material of plastic corrugated pipe is HDPE. Its corrosion resistance far superior to metal, not afraid of acid and alkaline, which itself does not corrode, can effectively protect the tendons from corrosion. Many prestressed structures suffer severely affected the outside world, such as de-icing salt or saline. When the post-tensioned structures obstruct or failure because collapse of waterproofing, micro-cracks water leakage and drainage facilities, tendons will be corrosion. FIP Construction Guide 1990in the grouting tendons that there is no permanent metal pipe corrosion resistance, which not resistant to water leakage and insufficient to reach the slurry, and tendons. The SBG Bplastic corrugated pipe can provide a far superior prestressed metal bellows protective effect of the barrier, to prevent the pollution of harmful substances through pipelines to ensure the post-tensioned structure is better durability

Under the same conditions, SBG (B) plastic wave Hole for significantly less than the friction coefficient of metal bellows Hole for the friction coefficient and reduce the tension during the friction loss in prestress. In general, plastic corrugated pipe friction coefficient is 0.14, while the metal bellows friction coefficient is 0.25; SBG (B) plastic corrugated tube, high strength, fear crushes, difficult to be vibrated baseball demolition, its sealing properties and resistance to leakage performance than metal bellows, more suitable for vacuum filling
SBG (B) plastic corrugated pipe is not conductive, which can prevent stray current corrosion, and metal is good conductor of electricity SBG (B) plastic corrugated pipe has better stamina performance, can greatly increase the resistance to fatigue of components.
SBG tube technical data sheet