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A structural repair and reinforcement material for concrete chimneys and cooling towers and its application

A technology for strengthening materials and concrete, which is applied in the field of building materials, can solve problems such as large space for improvement, decline in concrete performance and structural stability, and achieve the effect of improved fusion

Active Publication Date: 2022-04-19
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, there is still a lot of room for improvement in the fusion between the above-mentioned base surface repair material and the original concrete matrix after repair, and the effect of permanently integrating with the concrete cannot be truly realized, so the repaired concrete still has considerable performance. and the risk of reduced structural stability, eventually leading to re-loosing and cracking of the concrete matrix

Method used

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  • A structural repair and reinforcement material for concrete chimneys and cooling towers and its application
  • A structural repair and reinforcement material for concrete chimneys and cooling towers and its application

Examples

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preparation example Construction

[0028] 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.

[0029] 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-epo...

Embodiment 1

[0032] A structural repair and reinforcement material for concrete chimneys and cooling towers, comprising base surface repair mortar and concrete grouting liquid. Wherein: the base surface repair mortar includes the following components in mass percentage: 50% of natural quartz sand, and the specific surface area is greater than 12000cm 2 / g Portland cement 48.4%, acrylate / acrylamine / acrylate terpolymer 1.5%, D 95 < 10 micron hydraulic binder (methyl cellulose) 0.05%, polyethylene 0.05%.

[0033] The concrete grouting fluid comprises A component and B component with a mass ratio of 4.23:1.77, wherein:

[0034] The A component includes the following components in mass percentage: 62% of bisphenol-A-epichlorohydrin resin with Mw<700, 12% of glycidyl 12-14 alkyl ether, 1,6-hexanediol dishrinkle Glycerin ether 12%, bisphenol F epoxy resin with Mw<700 10.5%, 3-(2,3-glycidoxy)propyltrimethoxysilane 3.5%.

[0035] The B component includes the following components in mass percenta...

Embodiment 2

[0037] The difference from Example 1 is only that 2.5% of micron-sized diamine@aluminum MOF particles are used to replace the same amount of natural quartz sand in the base surface repair mortar.

[0038] The preparation method of the micron-sized diamine@MOF particles is as follows: adding aluminum nitrate and 4,4'-biphenyldicarboxylic acid to water with a molar ratio of aluminum element and carboxyl group of 1:1 and dispersing them evenly, heating the to 180°C, then adjust the pH of the resulting solution to 3, and keep it warm for 6 hours; after the reaction, filter, wash, dry and pulverize to obtain micron-sized aluminum MOF particles; impregnate the aluminum MOF particles in a diamine solution (m-phenylene Dimethylamine), let stand for adsorption for 3h, and centrifuge to obtain micron-sized diamine@MOF particles.

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Abstract

The invention relates to the field of building materials, and discloses a structure repair and reinforcement material for concrete chimneys and cooling towers and an application thereof. The repair and reinforcement material of the invention includes base surface repair mortar and / or concrete grouting liquid. Among them, the base surface repair mortar can be permanently integrated with the concrete, and make the repaired and reinforced concrete surface have excellent anti-carbonation, anti-seepage, anti-acid rain, anti-freezing and thawing capabilities; It can make loose concrete or concrete cracks and base surface repair mortar fully bond together and permanently integrate, thereby reducing the risk of loosening and cracking of repaired concrete again.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a structural repair and reinforcement material for concrete chimneys and cooling towers and an application thereof. 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 p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/06C04B28/04C09J163/00C09J171/00F23J13/00F28F25/00C04B111/72
CPCC04B28/04C09J163/00C09J11/06F23J13/00F28F25/00C04B2111/72C04B14/06C04B24/2688C04B24/383C04B24/121C04B24/2611C08L63/00C08L71/00C08K5/5435
Inventor 缪红波曾婷婷崔国军
Owner 北京固斯特国际化工有限公司
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