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Structure repairing and reinforcing method for concrete chimney and cooling tower

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: 2021-07-30
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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  • Structure repairing and reinforcing method for concrete chimney and cooling tower
  • Structure repairing and reinforcing method for concrete chimney and cooling tower
  • Structure repairing and reinforcing method for concrete chimney and cooling tower

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0117] Preferably, the preparation method of the micron-sized diamine@MOF particles comprises: adding aluminum nitrate and 4,4'-biphenyldicarboxylic acid to the Disperse evenly in water, heat up to 160-200°C, then adjust the pH of the resulting solution to 2-4, and keep it warm for 5-10 hours; after the reaction, filter, wash, dry and pulverize to obtain micron-sized aluminum MOF particles ;Immerse aluminum MOF particles in a diamine solution (isophoronediamine, m-phenylenediamine or m-xylylenediamine), let it stand for 2-4h for adsorption, and centrifuge to obtain micron-sized diamine@MOF particles.

[0118] The concrete grouting liquid includes A component and B component with a mass ratio of (4-4.5): (1.5-2.0), wherein: the A component includes the following components in mass percentage: bismuth with Mw<700 Phenol-A-epichlorohydrin resin 60-68%, glycidyl 12-14 alkyl ether 10-20%, 1,6-hexanediol diglycidyl ether 10-20%, bisphenol F with Mw<700 Epoxy resin 10-20%, 3-(2,3-e...

Embodiment 1

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

[0122] S1: Eliminate and clean the loose concrete at the repaired area until it reaches a solid base surface, ensuring that the treated base surface is solid and clean, free of loose mortar particles, floating layers, fatty substances, cement mortar skins, and uncompacted concrete;

[0123] S2: Derusting the steel bars;

[0124] S3: Use base surface repair mortar for repair, and ensure that the thickness of the protective layer for steel bars 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: Eliminate all loose concrete in the repaired area until the solid base surface, and ensure that the treated base surface is solid and clean, free of loose mortar particles, floating layers, fatty substances, cement mortar skins, and uncompacted concrete;

[0128] S2: Derusting the steel bars;

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

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

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

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Abstract

The invention relates to the field of building materials, and discloses a structure repairing and reinforcing method for a concrete chimney and a cooling tower. The structure repairing and reinforcing method comprises six different repairing and reinforcing schemes according to different types of concrete defects, the defects can be repaired and reinforced in a targeted mode, and full play can be given to the characteristic advantages of repairing and reinforcing materials to the maximum extent. The six defect types are as follows: (1) the repair depth is not greater than 5 cm; (2) the repairing depth is larger than 5 cm and is smaller than or equal to 1 / 3 of the structure thickness; (3) the repair depth is larger than 1 / 3 of the structure thickness and is smaller than or equal to 2 / 3 of the structure thickness; (4) the repair depth is equal to the structure thickness; (5) cracks of a concrete structure are reinforced and repaired; and (6) internal damage of concrete is reinforced and repaired.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a structural repair and reinforcement method for concrete chimneys and cooling towers. Background technique [0002] A chimney is a structure that provides ventilation for hot flue gas or smog; a cooling tower is a facility that uses the air convection effect formed by the difference in air density inside and outside the tower or natural wind to cool circulating water. The base body of chimneys and cooling towers is mainly made of concrete. Due to the particularity of its use environment, concrete is very susceptible to corrosion. Therefore, the surface of the base structure of chimneys and cooling towers often has defects, which need to be repaired and strengthened in time. [0003] At present, ordinary cement mortar is generally used to repair and reinforce the defect. For example, the applicant's previous application CN201810377366.9 discloses a permeable cross-linked composi...

Claims

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Application Information

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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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