Unlock instant, AI-driven research and patent intelligence for your innovation.

Prestressed concrete pipe mixed with polypropylene fibres

A polypropylene fiber and concrete pipe technology, applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problems affecting the impermeability and crack resistance and compactness of prestressed concrete pipes and prestressed steel cylinder concrete pipes and poor flexibility and impact resistance

Inactive Publication Date: 2013-08-07
ZHEJIANG DRAGON PIPE MFG CO LTD
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Prestressed concrete pipes and prestressed steel cylinder concrete pipes produced by the above-mentioned traditional process, due to the brittleness of ordinary concrete, have poor compactness, flexibility, and impact resistance under external forces, and are prone to inner wall cracks. Affect the anti-seepage and anti-crack performance of prestressed concrete pipes and prestressed steel cylinder concrete pipes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Prestressed concrete pipe mixed with polypropylene fibres
  • Prestressed concrete pipe mixed with polypropylene fibres
  • Prestressed concrete pipe mixed with polypropylene fibres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Depend on figure 1 What represented by -2 is an embodiment of the prestressed concrete pipe mixed with polypropylene fiber of the present invention, which includes socket 1, socket 2, concrete pipe core 3, prestressed steel wire 4, cement mortar protective layer 5; socket 1, socket 2. The concrete of the concrete tube core 3 is mixed with polypropylene fiber 6; the equivalent diameter of the mixed polypropylene fiber 6 is 20-40 μm, the length is 20 mm, and the initial modulus is 3.0×10 3 MPa, alkali resistance ≥ 95%, the dosage is 1200g per cubic meter of concrete; the inner diameter of this embodiment is 600mm, the wall thickness is 43mm, the thickness of the cement mortar protective layer 5 is 25mm, and the designed internal hydraulic pressure is 0.8MPa. The detection result of present embodiment is as table 1

[0015] Table 1 Test results of mechanical properties of prestressed concrete pipes mixed with polypropylene fibers

[0016]

Embodiment 2

[0018] Depend on image 3 Represented by -4 is an embodiment of the present invention mixed with polypropylene fiber prestressed steel cylinder concrete pipe, which includes socket 7, socket 8, embedded steel cylinder 9, steel cylinder inner concrete tube core 10, steel cylinder outside concrete The pipe core 11, the hoop prestressed steel wire 12 wound on the outer concrete pipe core 11, the cement mortar protective layer 13 protecting the hoop prestressed steel wire 12, the socket 7, the socket 8, the concrete pipe core 10 inside the steel cylinder, The concrete of the concrete core 11 outside the steel cylinder is mixed with polypropylene fiber 14; the equivalent diameter of the mixed polypropylene fiber 14 is 20-40 μm, the length is 18 mm, and the initial modulus is 3.0×10 3 MPa, alkali resistance ≥ 95%, the dosage is 1000g per cubic meter of concrete; the inner diameter of this embodiment is 1800mm, the wall thickness is 115mm, the thickness of the cement mortar protecti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

A prestressed concrete pipe mixed with polypropylene fibres belongs to the technical field of prestressed concrete pipes. The prestressed concrete pipe comprises a bellmouth, a socket, a concrete pipe core, a prestressed steel wire and a cement mortar protective course; or the prestressed concrete pipe comprises a bellmouth, a socket, an embedded steel cylinder, concrete pipe cores on the inner side and the outer side of the steel cylinder, a circumferential prestressed steel wire wound around on the concrete pipe core on the outer side, and a cement mortar protective course for protecting the circumferential prestressed steel wire. The prestressed concrete pipe is characterized in that the polypropylene fibres are mixed in the concrete of the bellmouth, the socket and the concrete pipe core, or the polypropylene fibres are mixed in concrete of the bellmouth, the socket and the concrete pipe cores on the inner side and the outer side of the steel cylinder of the prestressed steel cylinder concrete pipe. The prestressed concrete pipe mixed with the polypropylene fibres can improve the tensile strength and the breaking strength of concrete in the prestressed concrete pipe, inhibits cracks from being produced on the inner wall due to concrete shrinkage, improves the anti-penetrability performance and the anti-cracking ability of the pipe, improves the durability, and prolongs the service life.

Description

technical field [0001] The invention belongs to the technical field of concrete pipes, in particular to a prestressed concrete pipe mixed with polypropylene fibers. Background technique [0002] Since S.Goldfein of the United States began to explore the use of synthetic organic fiber-polypropylene fiber as an admixture of cement concrete in 1963, it has been applied in various countries around the world. In the 1970s, fiber concrete technology was introduced into my country. The advantages of polypropylene material are high strength, lower specific gravity than ordinary polymers, no water absorption at all, neutral material, no effect on acid and alkali, and good economy. These characteristics make it especially suitable for mixing in concrete , this technology has been applied to many cement concrete products and components, [0003] And many patents have been applied for, such as the use of polypropylene fiber instead of steel fiber, the publication date is 2003.3.16, the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/153F16L25/10
Inventor 倪志权倪靖珂
Owner ZHEJIANG DRAGON PIPE MFG CO LTD