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A structural repair and reinforcement method for concrete chimneys and cooling towers

A concrete and cooling tower technology, which is applied in building maintenance, building construction, construction, etc., can solve problems such as unsatisfactory repair and reinforcement effects, and achieve the effect of reducing performance and structural stability and excellent carbonation resistance

Active Publication Date: 2022-06-24
北京固斯特国际化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned patents only improve the anti-corrosion effect by repairing and strengthening the material itself.
The applicant found in practice that even if the same repair and reinforcement material is used, if the repair and reinforcement process is not appropriate for different types of concrete defects, the repair and reinforcement effect will be unsatisfactory. Develop different and targeted repair and reinforcement processes

Method used

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  • A structural repair and reinforcement method for concrete chimneys and cooling towers
  • A structural repair and reinforcement method for concrete chimneys and cooling towers
  • A structural repair and reinforcement method for concrete chimneys and cooling towers

Examples

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preparation example Construction

[0117] Preferably, the preparation method of the micron-sized diamine@MOF particles comprises: adding aluminum nitrate and 4,4′-biphenyl dicarboxylic acid in a ratio of aluminum element and carboxyl molar ratio of 1:(0.8-1.2) to The pH of the obtained solution is adjusted to 2-4, and the reaction is kept for 5-10 hours; after the reaction, the micron-sized aluminum MOF particles are obtained after filtering, washing, drying and pulverizing. ; Immerse the aluminum MOF particles in a diamine solution (isophorone diamine, m-phenylenediamine or m-xylylenediamine), stand for adsorption for 2-4 hours, and centrifuge to obtain micron-sized diamine@MOF particles.

[0118] The concrete grouting liquid includes A component and B component in a mass ratio of (4-4.5):(1.5-2.0), wherein: the A component includes the following components in mass percentage: double Phenol-A-Epichlorohydrin Resin 60-68%, Glycidyl 12-14 Alkyl Ether 10-20%, 1,6-Hexanediol Diglycidyl Ether 10-20%, Bisphenol F w...

Embodiment 1

[0121] The repair depth is not more than 5cm: the repair and reinforcement plan specifically includes the following steps:

[0122] S1: Remove and clean up the loose concrete at the repair site until it has a solid base surface, and ensure that the treated base surface is firm, clean, free of loose mortar particles, floating layer, fatty substances, cement mortar skin, and dense concrete;

[0123] S2: Derusting treatment of steel bars;

[0124] S3: Use base surface repair mortar for repair, and ensure that the thickness of the protective layer on the steel bar is not less than 2cm.

Embodiment 2

[0126] The repair depth is greater than 5cm and less than or equal to 1 / 3 of the structural thickness: the repair and reinforcement plan specifically includes the following steps:

[0127] S1: Remove all loose concrete from the repair site to a solid base surface, and ensure that the treated base surface is solid, clean, free of loose mortar particles, floating layer, fatty substances, cement mortar skin, and dense concrete;

[0128] S2: Derusting treatment of steel bars;

[0129] S3: Hanging steel mesh, the mesh adopts Φ3@60 steel mesh to ensure that the steel mesh is fixed on the vertical steel bars of the original structure;

[0130] S4: Use base surface repair mortar for repair, and ensure that the thickness of the protective layer of the steel bar is not less than 2cm;

[0131] S5: After 7 days of natural curing, the repaired parts are reinforced with concrete grouting liquid. The glue injection holes are arranged in a plum blossom shape. The depth of the grouting hole,...

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Abstract

The invention relates to the field of building materials, and discloses a structural repair and reinforcement method for concrete chimneys and cooling towers. The invention includes six different repair and reinforcement schemes according to different types of concrete defects, which can repair and reinforce the defects in a targeted manner and maximize the To maximize the advantages of the characteristics of repair and reinforcement materials. The six types of defects are: (1) the repair depth is not greater than 5cm; (2) the repair depth is greater than 5cm and less than or equal to 1 / 3 of the structural thickness; (3) the repair depth is greater than 1 / 3 of the structural thickness and less than or equal to 2 / 3 of the thickness of the structure; (4) The depth of repair is equal to the thickness of the structure; (5) The reinforcement and repair of cracks in the concrete structure; (6) The reinforcement and repair of the internal damage of the concrete.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a structural repair and reinforcement method for a concrete chimney and a cooling tower. Background technique [0002] A chimney is a structure that provides ventilation for hot flue gas or smoke; a cooling tower is a facility that cools circulating water by using air convection caused by the difference in air density inside and outside the tower or by natural wind. The bases of chimneys and cooling towers are mainly made of concrete. Due to the particularity of their use environment, concrete is very susceptible to corrosion. Therefore, defects often appear on the surface of base structures of chimneys and cooling towers, which need to be repaired and strengthened in time. [0003] At present, ordinary cement mortar is generally used to repair and reinforce defects. For example, the applicant's previous application CN201810377366.9 discloses a combination coating of penetration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G23/02C04B28/04C04B111/72
CPCE04G23/0211E04G23/0218C04B28/04C04B2111/72C04B2201/50C04B14/068C04B24/2688C04B24/383C04B24/405C04B24/2611
Inventor 缪红波曾婷婷张纯洁王利军房宏伟
Owner 北京固斯特国际化工有限公司
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