Polymer-cement-based composite pipe and preparing method for the same

Abstract

The invention belongs to the fluid pipe field, and specially discloses a polymer-cement-based composite pipe and a preparing method for the same. The polymer-cement-based composite pipe is characterized in the preparing steps of: mixing polyvinyl formaldehyde resin, styrene acrylic emulsion, cellulose, water reducing agent, plasticizer, cement and water to form cement paste, immersing a fiberglass needled mat in the cement paste, and coating and dehydrating to prepare the pipe. The composite pipe of the invention has the advantages of low production cost, good product sealing performance, strong anti-permeability and anti-corrosion capability, light overall weight, and long service life, and the preparing method of the invention is suitable for wide generalization and usage.

Description

(1) Technical field [0001] The invention belongs to the field of fluid pipelines, and particularly relates to a polymer cement-based composite pipeline and a preparation method thereof. (2) Background technology [0002] At present, water supply and drainage pipes mainly include steel pipes, ductile iron pipes, prestressed concrete pipes, prestressed steel cylinder concrete pipes, high-density polyethylene water supply and drainage pipes and glass fiber reinforced plastic sand pipes, etc., especially prestressed steel cylinder concrete water supply pipes, high Density polyethylene drainage pipes and FRP sand pipes are widely used. [0003] The characteristic of the prestressed steel cylinder concrete water supply pipe is that the interface adopts a steel socket, the size is more accurate, and is equipped with a rubber water stop ring, so the water stop effect is good, and because of the steel sleeve, the anti-seepage ability is very strong, but The pipe is bulky and inconvenie...

AI Technical Summary

Problems solved by technology

[0003] The characteristic of the prestressed steel cylinder concrete water supply pipe is that the interface adopts a steel socket, the size is relatively accurate, and it is equipped with a rubber waterstop ring, so the waterstop effect is good, and because of the role of the steel sleeve, the impermeability is very strong, but The pipe is heavy and inconvenient for transportation and installation. If there are small cracks in the concrete layer of the pipe, groundwater can invade and corrode the stressed steel bars, resulting in a decrease in the pressure resistance of the pipe and eventually causing damage to the pipe; the high-density polyethylene drainage pipe is due to its Light weight, corrosion resistance, no scaling, smooth inner wall, small friction coefficient, convenient construction and other excellent performances, more suitable for municipal engineering rainwater and sewage discharge, although its comprehensive cost is low, but its socket is a single rubber ring socket connection , the rigidity at the socket is insufficient, the deformation is large, the leakage rate is high, and the pipe fittings are not easy to match; the FRP sand-filled pipe has good corrosion resistance, smooth inner wall, good hydraulic performance, light weight and high strength, easy installation, and good sealing of the pipe body , low leakage rate, but due to the high cost of pipes in practical applications, its application has also been limited