Tell about the performance of the prestressed plastic corrugated pipe equipment is better than other metals
Tell about the performance of the prestressed plastic corrugated pipe equipment is better than other metalsThe raw material of the prestressed plastic corrugated pipe equipment is HDPE. Its corrosion resistance is much better than that of metal, it is not afraid of acid and alkali corrosion, and does not corrode itself, and can effectively protect the prestressed tendons from corrosion. Many prestressed structures are subject to severe external influences, such as deicing salt or salt water. When the post-tensioned component collapses due to the collapse of the waterproof layer, the leakage of micro-cracks, the blockage or failure of drainage facilities, the prestressed tendons may be corroded. The pre-stressed plastic corrugated pipe of the present invention can provide a barrier protection function far superior to that of a metal corrugated pipe for pre-stressed steel bars, and can prevent harmful substances from passing through the pipeline from pollution, thereby ensuring better durability of the post-tensioned pre-stressed structure. A new type of pore-forming material.
Tell about the performance of the prestressed plastic corrugated pipe equipment is better than other metals
It is very important to be applied to post-tensioned prestressed concrete structures. The hole forming of the tie rod has the advantages of good sealing performance, no water leakage, no leakage, high ring stiffness, small friction parameters, aging resistance, electrical corrosion resistance, flexibility and elasticity, and it is not easy to be damaged by the tamping rod. New connection The method makes the construction connection more convenient. After the hole-forming material is damaged, the propeller is a protective barrier for the prestressed steel plate in the prestressed concrete structure. Plastic corrugated pipes are used as perforated pipes for prestressing tendons in post-tensioned concrete structures. It has good corrosion resistance and improves the corrosion resistance of the prestressed tendons. Good physical properties, non-conductive, can prevent stray current corrosion, good sealing performance, no rust; under load, impervious to water; high, high rigidity, good impact resistance, no fear of stepping. Reduce the friction loss of the prestress during the tensioning process.
As a new type of pore-forming material, prestressed single bellows has no acid and alkali corrosion, good sealing performance, no water leakage, high ring stiffness, low friction coefficient, aging resistance, electrical corrosion resistance, good flexibility and toughness, and not easy It has the advantages of being scratched by the tamping rod, convenient construction and connection. Solve all the shortcomings of traditional metal bellows. The water-cement ratio is 0.4, which is better than ordinary pressure grouting in terms of pourability, pipeline compactness and mud strength. This is reflected in the elimination of air, water and bubbles mixed in the slurry under vacuum, as well as reduction in slurry porosity and water leakage. During the grouting process, the pores are well sealed, and the grout maintains pressure to fill the entire pores to ensure compactness. Through the optimization of process and grout, cracks are eliminated and the fullness and strength of grouting are ensured. Vacuum grouting is a continuous and rapid process. It takes only a few seconds to vacuum a 15m pipe with an inner diameter of φ92, grouting only takes 3 to 4 minutes, and normal pressure grouting takes about 20 minutes. It can provide a uniform and dense mortar protective layer with a density of more than 99, thereby shortening the grouting time.
Tell about the performance of the prestressed plastic corrugated pipe equipment is better than other metals
The plastic corrugated pipe has a fixed length of 5-10 meters. The plastic corrugated pipe has screw heads at both ends, which can be directly screwed together. The connection is convenient, simple, time-saving and labor-saving. The bellows and the bellows can be directly connected by heat fusion. Connect with plastic connecting pipe. The connection between the corrugated pipe and the anchor plate: connect with a plastic connector. The bellows and exhaust pipe are connected to the hot melt exhaust hole on the bellows, and then connected to the curved plastic exhaust pipe. As a post-tensioning material for forming holes, the corrugated pipe is an important part of the prestressing system. For a long time, in prestressed engineering, metal bellows have been used as pore-forming materials to overcome the problems of poor sealing performance, easy damage and easy corrosion of metal bellows. In order to provide an additional anti-corrosion barrier for the prestressed tendons, the prestressed plastic corrugated pipe uses a plastic corrugated pipe made of polyethylene or polypropylene as a product of tension after bonding to improve the structural life.
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