Abstract

A method for refurbishing a pre-stressed concrete cylinder pipe (PCCP) comprises removing concrete from an existing inner surface of the PCCP at each end thereof to expose a metal core, cleaning the exposed metal core and depositing filler over the exposed metal core at each end of the PCCP to a thickness wherein the filler is substantially flush with the existing inner surface. One or more layers of carbon fibre reinforced polymer (CFRP) liner are applied to the existing inner surface of the PCCP and to the filler at each end of the PCCP. Each layer of CFRP liner conforms to the inner surface of the PCCP and the filler and remains substantially cylindrical with substantially constant diameter along a length of the PCCP with substantially unbent cylindrical ends. After curing all layer(s) of CFRP liner, each terminus of the layer(s) of CFRP liner is sealed.

IPC Classes  ?

• F16L 9/08 - Rigid pipes of concrete, cement, or asbestos cement, with or without reinforcement
• B28B 19/00 - Machines or methods for applying the material to surfaces to form a permanent layer thereon
• B29C 63/34 - Lining or sheathing of internal surfaces using tubular layer or sheathings
• E03F 3/06 - Methods of, or installations for, laying sewer pipes
• F16L 9/153 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and concrete with or without reinforcement
• F16L 13/11 - Adhesive or cemented joints using materials which fill the space between parts of a joint before hardening
• F16L 25/00 - Construction or details of pipe joints not provided for in, or of interest apart from, groups
• F16L 49/02 - Joints with a sleeve or socket
• F16L 55/163 - Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a ring, a band or a sleeve being pressed against the inner surface of the pipe
• F16L 58/18 - Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings

Abstract

A method for refurbishing a pre-stressed concrete cylinder pipe (PCCP) comprises removing concrete from an existing inner surface of the PCCP at each end thereof to expose a metal core, cleaning the exposed metal core and depositing filler over the exposed metal core at each end of the PCCP to a thickness wherein the filler is substantially flush with the existing inner surface. One or more layers of carbon fibre reinforced polymer (CFRP) liner are applied to the existing inner surface of the PCCP and to the filler at each end of the PCCP. Each layer of CFRP liner conforms to the inner surface of the PCCP and the filler and remains substantially cylindrical with substantially constant diameter along a length of the PCCP with substantially unbent cylindrical ends. After curing all layer(s) of CFRP liner, each terminus of the layer(s) of CFRP liner is sealed.

IPC Classes  ?

• F16L 9/08 - Rigid pipes of concrete, cement, or asbestos cement, with or without reinforcement
• B29C 63/34 - Lining or sheathing of internal surfaces using tubular layer or sheathings
• F16L 13/11 - Adhesive or cemented joints using materials which fill the space between parts of a joint before hardening
• F16L 25/00 - Construction or details of pipe joints not provided for in, or of interest apart from, groups
• F16L 55/163 - Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a ring, a band or a sleeve being pressed against the inner surface of the pipe
• F16L 58/18 - Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
• B28B 19/00 - Machines or methods for applying the material to surfaces to form a permanent layer thereon
• E03F 3/06 - Methods of, or installations for, laying sewer pipes
• F16L 9/153 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and concrete with or without reinforcement
• F16L 49/02 - Joints with a sleeve or socket

Abstract

A method for refurbishing a pre-stressed concrete cylinder pipe (PCCP) comprises removing concrete from an existing inner surface of the PCCP at each end thereof to expose a metal core, cleaning the exposed metal core and depositing filler over the exposed metal core at each end of the PCCP to a thickness wherein the filler is substantially flush with the existing inner surface. One or more layers of carbon fibre reinforced polymer (CFRP) liner are applied to the existing inner surface of the PCCP and to the filler at each end of the PCCP. Each layer of CFRP liner conforms to the inner surface of the PCCP and the filler and remains substantially cylindrical with substantially constant diameter along a length of the PCCP with substantially unbent cylindrical ends. After curing all layer(s) of CFRP liner, each terminus of the layer(s) of CFRP liner is sealed.

IPC Classes  ?

• F16L 9/153 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and concrete with or without reinforcement
• F16L 55/1645 - Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing material being introduced inside the pipe by means of a tool moving in the pipe
• F16L 55/18 - Appliances for use in repairing pipes

Goods & Services

(1) Corrosion inhibiting paint type coatings; exterior paints; interior paints; polymer paints; protective coatings for rust prevention and corrosion control; weatherproofing coatings in the form of paints (2) Coatings in the form of epoxies for repairing and strengthening commercial infrastructure, namely, industrial buildings, pipes, and bridges.

Goods & Services

(1) Corrosion inhibiting paint type coatings; exterior paints; interior paints; polymer paints; protective coatings for rust prevention and corrosion control; weatherproofing coatings in the form of paints (2) Coatings in the form of epoxies for repairing and strengthening commercial infrastructure, namely, industrial buildings, pipes, and bridges.

Goods & Services

(1) Corrosion inhibiting paint type coatings; exterior paints; interior paints; polymer paints; protective coatings for rust prevention and corrosion control; weatherproofing coatings in the form of paints (2) Coatings in the form of epoxies for repairing and strengthening commercial infrastructure, namely, industrial buildings, pipes, and bridges.

Goods & Services

(1) Cement mixes; cementitious ready mixed concrete for hydraulic cement-based systems

Goods & Services

(1) Cement mixes; cementitious ready mixed concrete for hydraulic cement-based systems