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Repair mortar for tap water pipeline PCCP (Prestressed Concrete Cylinder Pipe)

A tap water pipeline repairing mortar technology, applied in the field of polymer cement mortar, to achieve the effects of improving cohesion and water retention, improving overall flexibility, and improving rheology

Inactive Publication Date: 2019-03-08
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The patent is not aimed at the repair of joints, but adding a large amount of redispersible rubber powder can solve the problem of material flexibility

Method used

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  • Repair mortar for tap water pipeline PCCP (Prestressed Concrete Cylinder Pipe)

Examples

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Embodiment 1

[0031] A repairing mortar for PCCP pipes for tap water pipelines, comprising the following raw materials in parts by weight: 30 parts of Portland cement; 20 parts of sulphoaluminate cement; 7 parts of heavy calcium powder; 40 parts of fine aggregate; redispersible rubber powder 3 parts; lithium carbonate 0.005 part; boric acid 0.1 part; hydroxyethyl cellulose ether 0.05 part; water reducer 0.01 part.

Embodiment 2

[0033] A repairing mortar for PCCP pipes for tap water pipelines, comprising the following raw materials in parts by weight: 50 parts of Portland cement; 10 parts of sulphoaluminate cement; 5 parts of heavy calcium powder; 30 parts of fine aggregate; redispersible rubber powder 5 parts; 0.1 part of lithium carbonate; 0.08 part of boric acid; 0.2 part of hydroxyethyl cellulose ether; 0.1 part of water reducer.

[0034] In this embodiment, Portland cement is ordinary salt cement with a strength grade of 42.5; and sulphoaluminate cement is a sulphoaluminate cement with a strength grade of 42.5.

Embodiment 3

[0036]A repairing mortar for PCCP pipes for tap water pipelines, comprising the following raw materials in parts by weight: 40 parts of Portland cement; 15 parts of sulphoaluminate cement; 10 parts of heavy calcium powder; 32 parts of fine aggregate; redispersible rubber powder 3; 0.03 parts of lithium carbonate; 0.06 parts of boric acid; 0.15 parts of hydroxyethyl cellulose ether; 0.05 parts of water reducing agent.

[0037] In this example, Portland cement is ordinary salt cement with a strength grade of 42.5; sulphoaluminate cement is a sulphoaluminate cement with a strength grade of 52.5; the gradation ratio of fine aggregate is 20 to 40 mesh: 40-70 mesh: 70-140 mesh = 1:4:3, fine aggregate mud content <2%; redispersible rubber powder is vinyl acetate-tertiary carbonic acid ethylene copolymer;

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Abstract

The invention discloses repair mortar for a tap water pipeline PCCP (Prestressed Concrete Cylinder Pipe), and belongs to the technical field of polymer cement mortar. The repair mortar is prepared from raw materials including gelling materials, fine aggregate, heavy calcium carbonate, hydroxyethyl cellulose, water reducing agents, redispersible adhesive powder, lithium carbonate and boracic acid,wherein the initial setting time of the repair mortar is 20 to 30min; the final setting time is 30 to 40min; the 28d intensity is 35 to 50MPa; the processless boding intensity is greater than 1.5MPa.The repair mortar has excellent performance; the prepared repair material has the advantages of safety, high intensity, strong bonding force, excellent cracking resistant performance, corrosion resistance and the like.

Description

technical field [0001] The invention relates to a repair mortar for PCCP pipes of tap water pipelines, belonging to the technical field of polymer cement mortar. Background technique [0002] There are three main types of tap water supply pipes: one is PE pipes, such as polyethylene pipes; the other is cast iron pipes, and the third is PCCP pipes that have been widely used in recent years, such as prestressed steel cylinder concrete pipes. [0003] Prestressed steel cylinder concrete pipe (hereinafter referred to as PCCP pipe) is composed of prestressed steel wire, steel cylinder and concrete, and is a composite pipe with high strength, high impermeability and high sealing performance. This kind of pipe is made by winding the prestressed steel wire in the hoop on the concrete pipe core with steel cylinder, and finally spraying the cement mortar protective layer on the outside of the pipe. With the expansion of the construction scale of water delivery projects, the number of...

Claims

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Application Information

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IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/50C04B7/02C04B14/02C04B14/28C04B22/10C04B22/082C04B24/26C04B24/383C04B2103/302
Inventor 林燕王宁杨涛胡继宗
Owner JIAHUA SPECIAL CEMENT
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