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High-ductility concrete hollow pipe and manufacturing method thereof

A high-ductility concrete and hollow pipe technology, applied in the direction of rigid pipes, pipes, pipes/pipe joints/fittings, etc., can solve the problems of high quality reinforced concrete pipes, easy cracking and damage of ordinary concrete, and high roughness coefficient of the inner wall of concrete. Achieve good economic performance, reduce the roughness coefficient, and avoid the effects of corrosion and fracture

Inactive Publication Date: 2015-04-08
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, even in fresh water transportation, PCCP pipes have the following defects and deficiencies in engineering applications: (1) The prestressed steel wire is easy to rust, once any part of the steel wire is rusted and broken, the entire pipe will suddenly collapse and cause Burst pipe, maintenance is more difficult than other pipes; (2) The roughness coefficient of the inner wall of the concrete is high, and the hydraulic characteristics are poor, which has a certain impact on the flow of the pipe; (3) Ordinary concrete is easy to crack and damage; (4) PCCP pipe Because the concrete structure layer is too thick and heavy, it is difficult to transport and install
[0005] Reinforced concrete pipes are heavy, difficult to transport and install, high roughness coefficient of the inner wall of the concrete, and poor hydraulic properties, which have a certain impact on the flow of the pipes, and the reinforced concrete pipes can only be used as non-pressure pipes

Method used

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  • High-ductility concrete hollow pipe and manufacturing method thereof
  • High-ductility concrete hollow pipe and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The high ductility concrete hollow structural pipe with an inner diameter of 2000mm is produced by the above process, and the process parameters are selected as follows:

[0042] The ECR surface felt impregnated with epoxy vinyl ester resin is used as the primer, and the ECR jet yarn and grid cloth are alternately laid and wound to form a resin-based composite lining layer with a thickness of 1.5mm;

[0043] The mass ratio of polyvinyl alcohol fiber to cement is 4.0%, the mass ratio of fly ash to cement is 1.5, the mass ratio of quartz sand to cement is 1.2, and the high ductility concrete is made by mixing, and the thickness of the high ductility concrete hollow structure layer is 50mm;

[0044] The prestressed layer of resin-based composite material is made of carbon fiber filaments impregnated with isophthalic unsaturated polyester resin, with a thickness of 2mm.

[0045] After performance test: tube stiffness ≥ 60000, roughness coefficient ≤ 0.0084. The test standa...

Embodiment 2

[0047] Using the above process to manufacture high ductility concrete hollow structural pipes with an inner diameter of 3000 mm, the process parameters are selected as follows:

[0048] The glass fiber prepreg yarn impregnated with polyethylene resin is wound into the inner lining layer of resin matrix composite material, with a thickness of 4mm;

[0049] The mass ratio of ultra-high molecular weight polyethylene fiber to cement is 2.0%, the mass ratio of fly ash to cement is 2.5, and the mass ratio of river sand to cement is 1.6. The high ductility concrete is made by mixing, and the thickness of the high ductility concrete hollow structure layer is 500mm;

[0050]The prestressed layer of resin-based composite material is made by winding glass fiber filaments impregnated with epoxy vinyl ester resin, with a thickness of 40mm;

[0051] After performance test: tube stiffness ≥ 500000, roughness coefficient ≤ 0.0084.

Embodiment 3

[0053] Using the above process to manufacture high ductility concrete hollow structural pipes with an inner diameter of 2000 mm, the process parameters are selected as follows:

[0054] The glass fiber prepreg yarn impregnated with polyethylene resin is wound into a resin-based composite lining layer of 2.5mm;

[0055] The mass ratio of polyvinyl alcohol fiber to cement is 4.5%, the mass ratio of fly ash to cement is 2.0, the mass ratio of quartz sand powder to cement is 1.5, and the high ductility concrete is made by mixing, and the thickness of the high ductility concrete hollow structure layer is 250mm;

[0056] The prestressed layer of resin-based composite material is made by winding glass fiber prepreg yarn impregnated with polyetheretherketone resin, with a thickness of 4mm;

[0057] After performance test: tube stiffness ≥ 150000, roughness coefficient ≤ 0.0084.

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Abstract

The invention discloses a high-ductility concrete hollow pipe and a manufacturing method thereof. The high-ductility concrete hollow pipe comprises a resin-based composite material lining layer, a high-ductility concrete hollow structure layer and a resin-based composite material pre-stressed layer in sequence from inside to outside; uniformly-distributed hollow holes are formed in the cross section of the high-ductility concrete hollow structure layer; the resin-based composite material lining layer is formed by winding glass fiber fabrics of a resin-impregnated polyester felt, a glass fiber surface felt, a short cut felt or the like; the resin-based composite material pre-stressed layer is formed by winding a resin-based material formed by compounding fibers or resin; an inner wall adopts the resin-based composite material lining layer, is corrosion-resistant and impermeable, can convey corrosive mediums and has excellent hydraulic performance; with the adoption of the resin-based composite material pre-stressed layer, not only can the corrosion be prevented, but also the occurrence of corrosion and fracture of a pre-stressed steel wire in a PCCP (Pre-stressed Concrete Cylinder Pipe) can be avoided, so that the durability of the pipe is improved; the high-ductility concrete hollow pipe has the characteristics of light mass, high resistance to inside and outside corrosive mediums, excellent hydraulic characteristic, great rigidity, low cost, high durability and the like.

Description

technical field [0001] The invention relates to a high-ductility concrete hollow pipe and a manufacturing method thereof. Background technique [0002] The most commonly used pipes in water supply and drainage projects are prestressed steel sleeve concrete pipes (PCCP pipes), glass fiber reinforced plastic pipes, and reinforced concrete pipes. [0003] PCCP pipe has the characteristics of high rigidity and relatively low cost. But at present, even in fresh water transportation, PCCP pipes have the following defects and deficiencies in engineering applications: (1) The prestressed steel wire is easy to rust, once any part of the steel wire is rusted and broken, the entire pipe will suddenly collapse and cause Burst pipe, maintenance is more difficult than other pipes; (2) The roughness coefficient of the inner wall of the concrete is high, and the hydraulic characteristics are poor, which has a certain impact on the flow of the pipe; (3) Ordinary concrete is easy to crack an...

Claims

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Application Information

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IPC IPC(8): F16L9/08
CPCF16L9/14
Inventor 张小玉李卓球宋建国宋建华陈建中宋鹏飞韩继明孙明清方玺吕泳徐东亮
Owner WUHAN UNIV OF TECH
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