Polymer-reinforced prestressed concrete cylinder pipe molding technology

A prestressed steel, forming process technology, applied in applications, tubular items, household appliances, etc., can solve problems such as electrochemical corrosion, corrosion failure of steel wires and steel cylinders, perforation leakage, etc., to reduce the formation of micro-cracks, enhance mixing Uniformity, the effect of preventing micro-crack initiation

Active Publication Date: 2018-01-19
江苏致乐管业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Concrete member products in the soil environment, if the prestressed steel cylinder concrete pipe does not take effective protection measures, as the service time prolongs, the aggressive medium in the soil environment of the outer wall of the prestressed steel cylinder concrete pipe and the water medium in the pipe will invade If the mortar protection layer and concrete layer in the prestressed steel cylinder concrete pipe reach the surface of the steel wire and steel cylinder, the steel wire and steel cylinder will undergo electrochemical corrosion, which will lead to corrosion failure of the steel wire and steel cylinder, perforation leakage or even explosion. The pipe phenomenon will cause hidden dangers to the safe operation of the pipeline system and directly threaten the operation reliability of the pipeline system. The corrosion of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] (1) Preparation of lining mold: Wrap a hoop prestressed steel wire on a concrete pipe core with a steel tube to prepare a semi-finished PCCP pipe. The semi-finished PCCP pipe is directly used as an lining mold, and the concrete pipe core is prefabricated There is a reinforcing net; the setting of the reinforcing net is to improve the mechanical properties of the pipeline such as compression and tension resistance, prevent the occurrence of cracks, and reduce the burden of the steel cylinder in the pipeline;

[0035] (2) Pretreatment of the outer mold: a layer of release agent is coated on the inner wall of the outer mold;

[0036] (3) Construction of the casting structure: from the inside to the outside, the inner lining mold, the reinforcing net, and the outer mold are formed into a casting structure, and the polymer concrete is poured into the casting structure. After forming, the outer mold is removed to obtain the polymer reinforced prestressed steel Tu...

Example Embodiment

[0051] Example 2

[0052] The difference from Example 1 is:

[0053] The polymer concrete includes 92% of aggregate, 8% of resin binder and auxiliary agent in terms of mass percentage, and the aggregate includes 1-with a mass ratio of 20:30:12:12:5:3. 3 mesh quartz sand, 5-9 mesh quartz sand, 20-30 mesh quartz sand, 40-60 mesh quartz sand, 80-100 mesh quartz sand, 140-200 mesh quartz sand.

[0054] In terms of mass percentage, the auxiliary agent includes a curing agent accounting for 1.8% of the mass of the resin adhesive, an accelerator accounting for 0.4% of the mass of the resin adhesive, a coupling agent accounting for 2% of the mass of the resin adhesive, and a resin adhesive. A polymerization inhibitor of 0.03% of the mass of the mixture, a flame retardant of 5% of the mass of the resin binder.

[0055] During the preparation process of the polymer concrete, the gel time in step D is 3 min. During gelation, the ambient temperature is controlled to be 20°C-21°C and the humidity...

Example Embodiment

[0056] Example 3

[0057] The difference from Example 1 is:

[0058] The polymer concrete includes 93% aggregate, 7% resin binder, and auxiliary agent, in terms of mass percentage, and the aggregate includes 2-weight ratio of 30:40:16:16:10:8. 3 mesh quartz sand, 6-8 mesh quartz sand, 15-25 mesh quartz sand, 35-55 mesh quartz sand, 90-110 mesh quartz sand, 150-180 mesh quartz sand.

[0059] In terms of mass percentage, the auxiliary agent includes a curing agent accounting for 1.4% of the mass of the resin adhesive, an accelerator accounting for 0.3% of the mass of the resin adhesive, a coupling agent accounting for 1.5% of the mass of the resin adhesive, and a A polymerization inhibitor of 0.025% of the mass of the mixture, a flame retardant of 6% of the mass of the resin binder.

[0060] During the preparation process of the polymer concrete, the gel time in step D is 4 minutes, and during gelation, the environmental temperature is controlled to be 20°C-22°C, and the humidity is 52...

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PUM

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Abstract

The invention provides a polymer-reinforced prestressed concrete cylinder pipe molding technology, and belongs to the technical field of pipeline manufacturing. The polymer-reinforced prestressed concrete cylinder pipe molding technology comprises the following steps that (1) manufacturing of a lining mold is conducted, wherein circumferential prestressed wires are wound around a concrete pipe core with a steel cylinder, a PCCP semi-finished product is formed and directly serves as the lining mold, and a reinforcing net is prefabricated in the concrete pipe core; (2) pretreatment of an outer mold is conducted, wherein a release agent coats the inner wall of the outer mold; and (3) construction of a pouring structure is conducted, wherein the lining mold, the reinforcing net and the outer mold are combined in sequence from inside to outside so as to form the pouring structure, polymer concrete is poured into the pouring structure, the outer mold is removed after molding is accomplished,and therefore a polymer-reinforced prestressed concrete cylinder pipeline is obtained. The polymer-reinforced prestressed concrete cylinder pipe molding technology is simple, and the manufactured polymer-reinforced prestressed concrete cylinder pipeline is excellent in performance and has the advantages of being high in sealing performance, strength and anti-permeability and resistant to corrosion.

Description

technical field [0001] The invention belongs to the technical field of pipeline production, and relates to a prestressed concrete pipeline, in particular to a polymer reinforced prestressed steel cylinder concrete pipeline forming process. The molding process of the invention is simple, and the prepared polymer-reinforced prestressed steel cylinder concrete pipeline has excellent performance in all aspects, and has the advantages of high sealing performance, high strength, high impermeability, corrosion resistance and the like. Background technique [0002] Prestressed steel cylinder concrete pipe, referred to as PCCP pipe, refers to a water delivery pipe made by winding a hoop prestressed steel wire on a high-strength concrete core with a steel cylinder, and then spraying a dense cement mortar protective layer on it. PCCP pipe is a new type of composite pipe composed of four basic materials: steel plate, prestressed steel wire, concrete and cement mortar, after steel cylind...

Claims

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Application Information

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IPC IPC(8): B29C39/10B29C39/26B29C33/38C04B26/02B29K503/08B29L23/00
Inventor 温振刚李先众谢云龙
Owner 江苏致乐管业科技有限公司
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