Pre-stress steel cylinder concrete pipe with low water absorbing capacity and production method thereof

Abstract

Disclosed are a low water absorption pre-stressed steel cylinder concrete pipe and the manufacturing method thereof, which belong to the pre-stress steel cylinder concrete pipe technical field. The low water absorption pre-stressed steel cylinder concrete pipe comprises an embedded steel cylinder, concrete pipe cores on the inner and outer sides of the steel cylinder, an annular pre-stressed steel wire coiled on the outer side concrete pipe core and a cement mortar protective layer used for protecting the annular pre-stressed steel wire; the pre-stressed steel cylinder concrete pipe is characterized in that the waterborne epoxy resin cement paste is compounded on the external wall of the cement mortar protective layer; the manufacturing method includes that the prepared waterborne epoxy resin cement paste is sprayed on the surface of the cement mortar protective layer of the pre-stressed steel cylinder concrete pipe by a roller spraying machine rotary platform, a spraying lift frame, a slurry pump, a paste conveying pipe, an air compressor and a nozzle. The low water absorption pre-stressed steel cylinder concrete pipe and the manufacturing method have the advantages of improving the intensity of the cement mortar protective layer greatly, reducing the water absorption, improving the alkali resistance, the acid resistance and the solvent resistance of the external wall of the pre-stressed steel cylinder concrete pipe and improving the service life of the concrete pipe accordingly.

Description

technical field [0001] The invention belongs to the technical field of prestressed steel cylinder concrete pipes and prestressed concrete pipes, and in particular relates to a low water absorption prestressed steel cylinder concrete pipe and a manufacturing method thereof. Background technique [0002] The prestressed steel cylinder concrete pipe and its manufacturing method are the most advanced pipe-making technology in the world today introduced from the American Ameron company in the early 1990s. It is a composite and environment-friendly pipe made of steel plate and concrete, that is, metal and non-metal. It not only absorbs the advantages of good impermeability of steel plate and corrosion resistance of concrete, but also overcomes the corrosion resistance of steel plate buried underground. The disadvantages of poor water resistance and poor impermeability of concrete are perfect and ideal high-quality pipes for water transportation and drainage. The technology can be...

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Problems solved by technology

The practice of applying this standard for many years shows that it has low water absorption requirements for the cement mortar protective layer, especially the prestressed steel cylinder concrete pipes buried in some polluted areas, because the cement mortar protective layer has nearly 9% to 11 % water absorption, so the corrosion rate of the polluted medium to the hoop prestressed steel wire is not slow, so the service life of the prestressed steel cylinder concrete pipe is affected

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