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Grouting material for repairing hollowing of exterior wall facing bricks and preparation method of grouting material

A technology for grouting and facing bricks, applied in the field of building materials, can solve the problems of high moisture content of the base layer, freeze-thaw damage of the outer wall, poor durability, etc., to improve the stability and anti-cracking performance, reduce and limit the slurry Deformation, freeze-thaw resistance and other performance improvement effects

Active Publication Date: 2022-01-18
JIANGSU NIGAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic grouting materials are generally epoxy resin materials, which have the advantages of good fluidity, fast hardening, firm adhesion, high construction efficiency, and streamlined operations, but have the following disadvantages: ① High requirements for the moisture content of the base Suitable for repairing exterior wall finishes with leakage; ② Poor air permeability, easy to cause freeze-thaw damage to exterior walls due to condensation in cold regions; ③ Poor durability, different life from buildings; ④ Higher price, etc.
Traditional inorganic grouting materials generally use Portland cement as the cementitious material. Although the mechanical properties and durability are good, its hardening speed is slow, the early strength is low, and the construction efficiency is not conducive to flow operation. Adding early strengthening agent, coagulant and other components to modify it is easy to produce defects such as efflorescence of facing bricks, and its shrinkage is large, the shear stress at the interface is relatively large, and there is also a risk of secondary hollowing

Method used

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  • Grouting material for repairing hollowing of exterior wall facing bricks and preparation method of grouting material
  • Grouting material for repairing hollowing of exterior wall facing bricks and preparation method of grouting material
  • Grouting material for repairing hollowing of exterior wall facing bricks and preparation method of grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A grout for repairing hollowing of exterior wall facing bricks, which uses a three-component polymer-modified phosphate cement grout, and the three components are composed of the following raw materials in weight percentage: Component A It is composed of the following raw materials in weight percentage: 80% of magnesium oxide, 0.2% of plastic expansion agent, 0.01% of cellulose ether, 0.05% of fiber, 7% of coagulation regulator, and 12.74% of quartz powder; said component B consists of the following weight percentage Composition of raw materials: Potassium dihydrogen phosphate 13%, ammonium dihydrogen phosphate 7%, fly ash 45%, quartz sand 35%; described C component is made up of the raw material of following weight percentage: Hydrophobic emulsion 13% , dispersant 3.5%, defoamer 0.02%, water 83.48%.

[0041] A method for preparing a grout for repairing hollows of exterior wall facing bricks, comprising the following steps:

[0042] (1) Add metal oxide, plastic expansi...

Embodiment 2

[0057] The difference from Example 1 is that the first component is made up of the following raw materials in percentage by weight: magnesia 75%, plastic expansion agent 0.2%, cellulose ether 0.02%, fiber 0.03%, coagulation regulator 7%, quartz powder 17.75% ; The B component is made up of the following raw materials in weight percentage: 13% potassium dihydrogen phosphate, 5% ammonium dihydrogen phosphate, 35% fly ash, 6% silica fume, 41% quartz sand; The components are composed of the following raw materials in weight percentage: 18% of hydrophobic emulsion, 3% of dispersant, 0.03% of defoaming agent and 78.97% of water.

[0058] When in use, stir components A, B, and C in a ratio of 1:1:0.68.

Embodiment 3

[0060] The difference from Example 1 is that the first component is made up of the following raw materials in weight percentage: 70% of magnesium oxide, 0.8% of plastic expansion agent, 0.05% of cellulose ether, 0.1% of fiber, 10% of coagulation regulator, and 19.05% of quartz powder ; The B component is made up of the following raw materials in weight percentage: potassium dihydrogen phosphate 12%, ammonium dihydrogen phosphate 3%, fly ash 60%, quartz sand 25%; the C component is composed of the following weight Raw material composition in percentage: 10% of hydrophobic emulsion, 2% of dispersant, 0.05% of defoamer, and 87.95% of water.

[0061] When in use, stir components A, B, and C in a ratio of 1:1:0.7.

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Abstract

The invention relates to the technical field of building materials, in particular to a grouting material for repairing hollowing of exterior wall facing bricks, and adopts a three-component polymer modified phosphate cement grouting material which comprises the following raw materials: a component A including a metal oxide, a plastic expanding agent, cellulose ether, fibers, a thickening time control agent and quartz powder, a component B including phosphate, a mineral admixture and quartz sand, and a component C including a hydrophobic emulsion, a dispersing agent, a defoaming agent and water. During preparation, the component A, the component B and the component C are stirred according to a certain proportion. The grouting material for repairing hollowing of the exterior wall facing bricks and the preparation method of the grouting material are suitable for projects with high water content of a base layer, and pulping equipment of the grouting material is composed of powder metering, mixing and conveying equipment, a high-speed variable-frequency stirrer, a liquid material conveying device and the like, has the technical characteristics of full automation, high precision, self-cleaning and the like, and solves the defects that due to the fact that the operable time of materials is short, equipment is prone to being blocked, cleaning frequency is high, and construction efficiency is low.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a grout for repairing hollows of exterior wall facing bricks and a preparation method thereof. Background technique [0002] The exterior wall facing brick has the characteristics of solid texture, high strength, waterproof, corrosion resistance, good durability, and rich color. It is a relatively commonly used exterior wall decoration material. However, as time goes by, due to improper selection of adhesives, incorrect construction methods, unreasonable separation joints, and environmental temperature changes, some building exterior wall facing bricks have quality defects such as leakage, hollowing, and falling off. Not only will it affect the decorative function and use function of the building, but it will seriously cause safety accidents. [0003] In order to rectify defects such as hollowing and leakage of building exterior wall facing bricks, the traditional rep...

Claims

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Application Information

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IPC IPC(8): C04B28/34C04B16/06C04B24/12C04B24/24C04B24/42C04B111/72C04B111/70C04B103/30
CPCC04B28/344C04B16/0675C04B24/129C04B24/24C04B24/42C04B2111/72C04B2111/70C04B2201/05C04B2111/00008C04B2103/302C04B2201/50C04B22/066C04B24/383C04B22/0013C04B14/06C04B18/08C04B18/146C04B24/32C04B22/002Y02W30/91
Inventor 钱中秋张宗超郭锋濮熊熊王友力
Owner JIANGSU NIGAO SCI & TECH
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