White Bamboo Joint Pipe Prestressed Bamboo Joint Pipe Corrugated Pipe/φ60mm Corrugated Pipe for Precast Beams

After the pore-forming material is damaged, the grout becomes the final protective barrier for prestressed steel in prestressed concrete structures. Plastic corrugated pipes are a new type of pore-forming material. Compared to metal corrugated pipes, they offer the following advantages:

Prestressed Plastic Corrugated Pipes

1. The raw materials for prestressed corrugated pipes are mostly made from recycled HDPE pellets through extrusion molding. The characteristics require the raw materials to have high strength and good flexibility to ensure the produced pipes meet national standards. White Bamboo Joint Pipe Prestressed Bamboo Joint Pipe Corrugated Pipe/φ60mm Corrugated Pipe for Precast BeamsDue to early involvement in the field, the technology, production capacity, and services are relatively mature. The above-mentioned enterprises, having engaged early, dominate the raw material supply for prestressed plastic corrugated pipes, with their supply covering nationwide. Prestressed corrugated pipes have far superior corrosion resistance compared to metal, being resistant to acid and alkali corrosion. They themselves do not corrode and effectively protect the prestressed tendons from corrosion.White Bamboo Joint Pipe Prestressed Bamboo Joint Pipe Corrugated Pipe/φ60mm Corrugated Pipe for Precast BeamsMany prestressed structures are subjected to severe external influences, such as deicing salts or saline water. When post-tensioned components suffer from waterproofing failure, micro-crack leakage, or blocked or failed drainage facilities, the prestressed tendons may be corroded. The "Grouting of Prestressed Tendons" in the FIP Construction Guide (1990) points out that metal pipes do not have permanent anti-corrosion capabilities and are insufficient to resist water penetration from reaching the grout and prestressed tendons. In contrast, prestressed plastic corrugated pipes provide a barrier protection for prestressed tendons far superior to metal corrugated pipes, preventing harmful substances from penetrating and contaminating the pipeline, thereby ensuring better durability for post-tensioned prestressed structures;

2. Under the same conditions, the friction coefficient of the reserved ducts for prestressed plastic corrugated pipes is significantly lower than that of metal corrugated pipes, reducing friction losses during the tensioning process. Generally, the friction coefficient for plastic corrugated pipes is taken as 0.14, while for metal corrugated pipes it is 0.25. Prestressed plastic corrugated pipes have high strength, are resistant to stepping and compression, and are less likely to be damaged by vibrating rods. Their sealing and anti-leakage performance are higher than those of metal corrugated pipes, making them more suitable for vacuum grouting;

3. Prestressed corrugated pipe manufacturers are mainly concentrated in White Bamboo Joint Pipe Prestressed Bamboo Joint Pipe Corrugated Pipe/φ60mm Corrugated Pipe for Precast Beams(Hunan Yueyang, Hebei Hengshui, Guangxi Liuzhou, Jiangxi Ji'an, and other regions)

4. Application fields of prestressed corrugated pipes include highways, railways, bridges, high-rise buildings, and large-span prestressed tensioning.

5. Colors are not restricted and can be changed according to construction requirements, with black being the most common color.