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Buried water supply steel pipe liner mortar

A mortar and steel pipe technology, applied in the field of buried water supply steel pipe lining mortar, can solve the problems of not greatly improving the crack resistance and bonding performance, so as to improve the crack resistance and chloride ion erosion resistance, increase flexibility and The effect of resisting tensile stress and increasing workability

Inactive Publication Date: 2019-04-09
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The mortar in the above-mentioned patents has not greatly improved the crack resistance and bonding performance, and mainly presents a "rigid" state

Method used

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  • Buried water supply steel pipe liner mortar

Examples

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Effect test

Embodiment 1

[0036] A lining mortar for buried water supply steel pipes, comprising the following raw materials in parts by weight: 30 parts of Portland cement; 5 parts of fly ash; 5 parts of silica fume; 10 parts of heavy calcium; 50 parts of fine aggregate; 0.05 part of cellulose ether; 0.01 part of water reducer; 3 parts of redispersible rubber powder; 0.05 part of defoamer;

Embodiment 2

[0038] A lining mortar for buried water supply steel pipes, comprising the following raw materials in parts by weight: 40 parts of Portland cement; 3 parts of fly ash; 6 parts of silica fume; 5 parts of heavy calcium; 42 parts of fine aggregate; 0.1 part of cellulose ether; 0.02 part of water reducer; 4 parts of redispersible rubber powder; 0.1 part of defoamer;

[0039] In this embodiment, the Portland cement is ordinary Portland cement with a strength grade of 42.5; the water demand ratio of silica fume is 120, and the activity index is 110.

Embodiment 3

[0041] A lining mortar for buried water supply steel pipes, comprising the following raw materials in parts by weight: 50 parts of Portland cement; 3 parts of fly ash; 5 parts of silica fume; 5 parts of heavy calcium; 38 parts of fine aggregate; 0.2 parts of cellulose ether; 0.1 parts of water reducer; 5 parts of redispersible rubber powder; 0.8 parts of defoamer;

[0042] In this example, Portland cement is a low-heat Portland cement with a strength grade of 42.5; the water demand ratio of silica fume is 115, and the activity index is 120; the viscosity of hydroxyethyl cellulose ether is 30000mPa·s; Carboxylic acid superplasticizer, the water reducing rate is 25%, the length of basalt fiber is 6mm, and the tensile strength is 3000MPa.

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Abstract

The invention discloses buried water supply steel pipe liner mortar and belongs to the technical field of polymer cement mortar. According to the buried water supply steel pipe liner mortar provided by the invention, raw materials comprise a gel material, fine aggregate, calcium triple superphosphate, hydroxyethyl cellulose ether, a water reducing agent, dispersible adhesive powder, a de-foaming agent, an expanding agent and basalt fibers, wherein the water-material ratio of the mortar is 0.3 to 0.4, the 28d strength of the mortar is 40 to 60MPa, the breaking strength is 10MPa or more, the bonding strength is greater than 1.0MPa and the shrinkage rate is -0.2 to +0.05 percent. The mortar disclosed by the invention has micro-expansion and flexible properties so that the mortar has an adhesion force on a steel pipe and can bear stress generated by the deformation of the steel pipe under high-pressure water flow.

Description

technical field [0001] The invention relates to a buried water supply steel pipe lining mortar, which belongs to the technical field of polymer cement mortar. Background technique [0002] Large-diameter long-distance water delivery steel pipes have a long service life, usually not less than 30 years. The amount of maintenance and transformation is large and the cost is high, and the corrosion is not easy to detect because of the concealed work of buried laying. Therefore, it is of great significance to ensure the reliable service life of water delivery steel pipes. [0003] Although the corrosiveness of the water quality is small, it exists after all. According to experience, the water delivery steel pipes without anti-corrosion on the inner wall will have different degrees of rust layer, rust and pits on the inner wall of the steel pipe after several years of use. Every time the water is cut off for maintenance, a large amount of air enters, and the inner wall of the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00706C04B2201/50C04B18/08C04B18/146C04B14/28C04B24/383C04B2103/302C04B2103/0057C04B2103/50C04B14/02C04B22/142C04B14/4643C04B22/002
Inventor 林燕王宁杨涛胡继宗
Owner JIAHUA SPECIAL CEMENT
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