Method for preparing high-adhesion low-shrinkage inorganic anchor glue for steel bars

A steel bar anchoring and low shrinkage technology, which is applied in the field of reinforcement material preparation for building structures, can solve problems such as weak cohesion, and achieve the effect of improving cohesion and dispersion performance

Active Publication Date: 2018-05-18
江苏和跃新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is to provide a high-viscosity and low-shrinkage inorganic steel anchor glue for the defect that the inorganic steel anchor glue will shrink in the later stage of solidification, which will cause the bonding force between the inorganic steel anchor glue and the steel bar to weaken. method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026]Put 200g of straw residue and 400mL of sodium hydroxide solution with a mass fraction of 45% into a water bath reactor with a stirrer, heat the water bath to 90°C, start the stirrer, and stir for 3 hours until the straw residue is completely dissolved to obtain woody The lignin lye: the lignin lye is neutralized to neutral with glacial acetic acid with a mass fraction of 95%, to obtain a lignin suspension, and the lignin suspension is placed in a high-speed centrifuge at a speed of 3500r / min at a high speed Centrifuge for 12 minutes, remove the supernatant, separate the lower precipitate, wash the precipitate with water twice, place it in an oven with a set temperature of 70°C, and dry it for 4 hours to obtain lignin powder; add 70g of β-cyclodextrin and 100mL of sodium hydroxide solution with a mass fraction of 90%, stirred at room temperature for 10min, then added 5g of glycidyltrimethylammonium chloride, placed the beaker in a water bath, heated to 50°C, and kept the t...

example 2

[0028] Put 215g of straw residue and 425mL of sodium hydroxide solution with a mass fraction of 45% into a water bath reactor with a stirrer, heat the water bath to 93°C, start the stirrer, and stir for 4h until the straw residue is completely dissolved to obtain a woody The lignin lye: the lignin lye is neutralized to neutral with glacial acetic acid with a mass fraction of 95%, to obtain a lignin suspension, and the lignin suspension is placed in a high-speed centrifuge at a speed of 3600r / min at a high speed Centrifuge for 14 minutes, remove the supernatant, separate the lower layer to obtain the precipitate, wash the precipitate with water twice, put it in an oven with a set temperature of 75°C, and dry it for 4.5 hours to obtain lignin powder; add 73g of β-cyclodextrin to the beaker and 115mL of sodium hydroxide solution with a mass fraction of 90%, stirred at room temperature for 13min, then added 7g of glycidyltrimethylammonium chloride, placed the beaker in a water bath...

example 3

[0030] Put 230g of straw residue and 450mL of sodium hydroxide solution with a mass fraction of 45% into a water bath reaction kettle with a stirrer, heat the water bath to 95°C, start the stirrer, and stir for 5h until the straw residue is completely dissolved to obtain a woody The lignin lye: the lignin lye is neutralized to neutral with glacial acetic acid with a mass fraction of 95%, to obtain a lignin suspension, and the lignin suspension is placed in a high-speed centrifuge at a speed of 3700r / min at a high speed Centrifuge for 15 minutes, remove the supernatant, separate the lower precipitate, wash the precipitate with water for 3 times, place it in an oven with a set temperature of 80°C, and dry it for 5 hours to obtain lignin powder; add 75g of β-cyclodextrin and 130mL of sodium hydroxide solution with a mass fraction of 90%, stirred at room temperature for 15min, then added 10g of glycidyltrimethylammonium chloride, placed the beaker in a water bath, heated to 55°C, a...

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Abstract

The invention relates to the technical field of preparation of reinforcing materials for building structures, in particular to a method for preparing high-adhesion low-shrinkage inorganic anchor gluefor steel bars. The method comprises the steps of: adopting straw as a raw material, performing heating and alkaline boiling to obtain lignin alkaline liquor, neutralizing the lignin alkaline liquor by using acetic acid, performing high-speed centrifugation, washing and drying to obtain lignin powder, treating a homemade crude solid product to obtain white powder, and adding the lignin powder, quartz sand, fly ash and the like into diluted slurry to obtain the inorganic anchor glue for the steel bars. According to the method, Portland cement in the anchor glue can be wrapped by quaternary ammonium cationic cyclodextrin in a form of colloid in water, and therefore Portland cement particles in the anchor glue repel each other, so that the adhesion between the inorganic steel-bar anchor glueand the steel bars is improved; through the addition of a certain amount of lignin, shrinkage of the inorganic steel-bar anchor glue can be reduced when the inorganic steel-bar anchor glue is solidified rapidly, so that the adhesion between the inorganic steel-bar anchor glue and the steel bars is reinforced, and a broad application prospect is provided.

Description

technical field [0001] The invention relates to the technical field of preparation of reinforcing materials for building structures, in particular to a preparation method of high-viscosity and low-shrinkage inorganic steel bar anchoring glue. Background technique [0002] Anchor glue, commonly known as planting glue, is mainly used in the construction industry to strengthen the connection between concrete and steel bars. Reinforced concrete structures occupy an extremely important position and a considerable amount in my country's construction. With the development of my country's economic construction and industrial structure, anchoring glue has been rapidly developed and widely used in recent years. [0003] Commonly used reinforcement anchor materials are divided into two categories: organic and inorganic. Organic anchoring materials usually use epoxy-based structural adhesives. Although they have high strength, they have poor water resistance, low bonding strength in hu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B24/38C04B24/18
CPCC04B24/18C04B24/383C04B28/04C04B2111/00637C04B24/32C04B24/2652C04B18/08C04B14/304
Inventor 高俊何少雄张建初
Owner 江苏和跃新材料科技有限公司
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