Long-acting corrosion prevention method for embedded prestressed cylinder concrete pipe

Abstract

The invention provides a long-acting corrosion prevention method for an embedded prestressed cylinder concrete pipe. By the adoption of ultrahigh-performance concrete with high deformation capacity, prestressed steel wire and other embedded steel materials are bonded, covered and prevented from being corroded, and the method is used for inner concrete protection. The ultrahigh-performance concrete has excellent physical and mechanical performance including high bonding strength, high deformation capacity, high anti-crack capacity, high toughness, high tensile strength, high impervious performance, high chemical corrosion resistance and high freeze-thaw resistance, namely the ultrahigh durability, reliable and long-acting corrosion prevention protection can be provided for the embedded prestressed cylinder concrete pipe, the durability and operation reliability of the pipeline are substantially improved, and the expected long service life (75-100 years) of the pipeline laid through the pipe materials is guaranteed and achieved.

Description

technical field [0001] The invention relates to a long-term anti-corrosion method for embedded prestressed steel cylinder concrete pipes, especially adopts ultra-high-performance concrete with high deformation capacity to protect the steel in the pipeline from corrosion for a long time in a corrosive environment, and to protect the inner wall of the concrete from corrosion. Corroded by sewage. Background technique [0002] Prestressed Concrete Cylinder Pipe (PCCP for short) is a water pipe that originated in France. It began to develop in Europe and the United States in the 1940s, and began to develop and apply in China in the 1980s. [0003] PCCP is composed of a high-strength concrete tube core with a steel cylinder wrapped with prestressed steel wire, and then sprayed with a cement mortar protective layer; the steel socket and the steel cylinder are welded together, and the groove on the socket and the rubber ring form a sliding type flexible connector. PCCP is divided ...

AI Technical Summary

Problems solved by technology

That is to say, the cracking of the mortar protective layer of the PCCP pipe and the inability to effectively protect the prestressed steel wire are due to the insufficient deformation and crack resistance of the mortar itself, and the design of the pipe will limit the performance of the mortar, so that PCCP (PCCPE and PCCPL pipe ) have inherent defects of insufficient durability

In a dry and corrosive environment with large temperature differences, this defect is fatal, and the prestressed steel wire will rust, break and burst quickly

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