CN115125068A - Biogel type structure surface alkali return crystal clearing material and application - Google Patents
Biogel type structure surface alkali return crystal clearing material and application Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
- C11D7/268—Carbohydrates or derivatives thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
- C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
- C11D17/003—Colloidal solutions, e.g. gels; Thixotropic solutions or pastes
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
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- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/40—Specific cleaning or washing processes
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/40—Specific cleaning or washing processes
- C11D2111/44—Multi-step processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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Abstract
The invention relates to a material for removing alkali-returning crystals on the surface of a biogel type structure, which consists of 100 parts of water, 5-7 parts of agar powder, 0.006-0.01 part of oxalic acid crystals and 0.9-1.1 part of cellulose by mass, wherein the material for removing the alkali-returning crystals on the surface of the biogel type structure has small acidification corrosion damage to the outer vertical surface of the structure and can avoid the negative effect of wide acid corrosion.
Description
Technical Field
The invention relates to the field of removing alkali-returning crystal stains on the outer vertical surface of a building or a structure, in particular to a material for removing alkali-returning crystals on the surface of a biogel type structure and application thereof.
Background
In recent years, with the increasing development and construction demands of cities, building materials with excellent mechanical properties and aesthetic properties, represented by cement-based paving bricks, exterior wall facing bricks and load-bearing walls, are more and more widely applied to the construction engineering of municipal public infrastructures. However, after the paving is finished and put into use for a period of time, considerable engineering projects gradually generate the phenomenon of 'flooding/alkali return', which is embodied by white or white-like mineral crystal 'salt frost' substances seeped out from the decorative surface of the building material and the groove seam of the paving building material. The occurrence of the phenomenon not only seriously affects the aesthetic degree of the structural facilities, but also causes great hidden danger to the use safety of products.
The phenomenon of "efflorescence/reversion" only shows a reduction in the aesthetic degree of the surface of the veneer at an early stage, the degree of damage caused is relatively slight, and the performance of the building material is not substantially negatively affected by the precipitated crystalline "salt frost". However, if the flooding/alkali return phenomenon is not controlled and is continuously developed, the large precipitation and deposition of the salt frost gradually affect the flatness of the paving surface, and bring potential safety hazards to roadways and other projects. In the past, the continuous development of the flooding/alkali return phenomenon further causes the porosity of the surface of the building material to be improved, reduces the comprehensive mechanical property of the building material, induces debonding and cracking of the building material, not only causes great hidden danger to the use safety of the structure, but also weakens the protection effect of the building material on erosive ions, is not beneficial to maintaining the durability of the structure and further causes a great amount of economic loss.
At present, the technical scheme mainly adopted for the clearing work of the category of crystals is as follows: and (5) spraying the oxalic acid solution. Namely, the strong acid oxalic acid solution is used for continuously washing the quick corrosion crystal stains, so that the surface of the structure is quickly cleaned. However, the method requires repeated spraying and washing operations on the damaged surface by using high-pressure spraying equipment, which not only consumes a great deal of labor and material cost, but also causes extensive acidification and corrosion on the outer surface of the structure. More seriously, the oxalic acid solution remained on the outer surface after being sprayed causes continuous strong acid corrosion to the local area of the outer surface after being dried, further induces more serious alkali return disease to the structure in a relatively shorter maintenance period or reduces the strength and the durability of the cement-based cementing material. In addition, the waste liquid caused by acid washing also causes continuous pollution to the surrounding environment and green plants, causes negative effects such as unbalanced pH value of soil and even water, withered green plants and the like, and causes negative effects on the maintenance of the surrounding ecological environment.
Typical prior art techniques are as follows: chinese patent CN110219425A discloses a construction process for reducing the quality problem of alkali return of building exterior walls, which also mainly adopts an oxalic acid brushing process to brush oxalic acid uniformly on the surface of the building exterior wall, and polyurethane is brushed after the oxalic acid brushing process to prevent alkali return.
Chinese patent CN111154561A discloses a whiskering cleaning and alkali inhibiting agent for brick walls and stone surfaces, which is composed of the following raw materials in parts by weight: 1-2 parts of oxalic acid, 2.5-6 parts of alkyl polyglucoside, 1-3 parts of alkylbenzene sulfonate, 0.5-2 parts of water-miscible glycol, 1-1.5 parts of catalyst and 18-30 parts of deionized water. The components are complex and the price of the components is expensive.
The basic layer treatment process is also clearly described in the building decoration construction technology, ash, sundries, floating ash, dust and the like on the wall surface are cleaned, the basic layer with efflorescence and salting is cleaned by adopting 3 percent oxalic acid solution, and then the basic layer is washed clean by using clear water or is brushed with alkali-resistant primer on one side. However, oxalic acid solution does not have good compatibility for biocompatibility, and especially, the requirement of whiskering on the edges of footpaths and the like is difficult to meet.
Based on the technical problems, the application provides a surface alkali-returning crystal clearing material for a biogel type structure, which has good biocompatibility, simple composition and low price and is beneficial to construction.
Disclosure of Invention
The invention mainly aims to provide a material for removing alkali-returning crystals on the surface of a biogel type structure, a preparation method and application thereof, and aims to solve the problems of high material consumption, environmental pollution and negative influence on buildings of the existing material for removing alkali-returning crystals.
In order to achieve the purpose, the technical scheme adopted by the invention is to provide a material for removing alkali-returned crystals on the surface of a biogel type structure, which consists of water, agar, oxalic acid and cellulose, and is characterized in that the material for removing alkali-returned crystals comprises 100 parts of water, 5-7 parts of agar powder, 0.006-0.01 part of oxalic acid crystals and 0.9-1.1 part of cellulose by mass.
Optionally, the agar powder is high gel strength grade agar powder meeting the requirements of GB 1886.239-2016.
Optionally, the chemical formula of the first-class oxalic acid crystal meeting GB/T1626-2008 standard I is as follows: HO 2 CCO 2 H·2H 2 O。
Optionally, the cellulose is methyl cellulose powder meeting relevant physicochemical properties of GB/T34263-2017 standard.
The application also specifically provides a preparation method of the surface alkali-returning crystallization clearing material for the biogel type structure, which comprises the following steps:
s1: preparing an agar polysaccharide aqueous solution, heating water to boil at normal temperature and normal pressure, pouring agar powder, continuously stirring and maintaining the boiling state for 1-5 minutes, and supplementing water lost in the boiling evaporation process according to the quality monitoring of boiling water to obtain the agar polysaccharide aqueous solution;
s2: preparing a functional agar polysaccharide aqueous solution, adding oxalic acid crystals and cellulose with a given mass into the agar polysaccharide aqueous solution, continuously heating and keeping stirring at a constant speed for 1-5 minutes under the condition that the solution temperature is kept higher than 90 ℃ to obtain a mixed solution;
s3: accurately weighing the water evaporation loss in the heating and stirring preparation process, weighing hot water with the corresponding mass loss of more than 90 ℃, supplementing the hot water into the mixed solution, continuously stirring the mixed solution uniformly, adjusting the heating system, and reducing the temperature of the solution to a range of 50-60 ℃ to prepare the alkali-returning crystal removal material on the surface of the biogel type structure.
Optionally, the water in step S1 is deionized water, and the continuous stirring and boiling state maintaining time is 2-3 minutes.
Optionally, the time of the uniform stirring in the step S2 is 2 to 3 minutes.
The application also specifically provides an application of the surface alkali-returning crystallization clearing material for the biogel type structure, which comprises the following steps:
s1: maintaining the temperature of the alkali-returning crystal clearing material on the surface of the biogel type structure at 50-60 ℃;
s2: coating the surface of the biogel type structure with a returned alkali crystal cleaning material on the surface of a returned alkali crystal; waiting for the surface alkali return crystallization cleaning material of the biogel type structure to solidify;
s3: repeating the steps S1-S2, and brushing the surface alkali-returning crystallization clearing material of the biological gel type structure until the gel thickness is not less than 2 mm;
s4: standing for reaction for 1-2h, waiting for proper dehydration of the alkali-returning crystal clearing material on the surface of the biogel type structure, and stripping the alkali-returning crystal clearing material on the surface of the biogel type structure;
s5: checking the condition of alkali return cleaning, and repeating S1-S4 when the alkali return is remained.
Optionally, in step S4, a scraper or a scraper is used to strip and remove the alkali-returning crystal removal material from the surface of the biogel-type structure.
Optionally, a pretreatment step is also included, which comprises cleaning dust, impurities and floating ash on the surface of the building with the alkali-returning crystals, and cleaning the surface of the building with the alkali-returning crystals by using water.
The beneficial effects of the invention are: (1) according to the scheme, only weak acid softening gel formed by agar polysaccharide solution is coated on a disease crystallization position, and a large amount of strong acid solution spraying and scouring operation is not needed to be carried out on the outer vertical surface of the structure through mechanical spraying equipment, so that 'supersaturation type strong acid surface corrosion' on the outer vertical surface of the structure is converted into 'weak acid slow-release type point corrosion' aiming at alkali-returning crystals. The acid corrosion and the continuous acid corrosion damage to the outer vertical surface of the structure are small, and the negative effect of wide acid corrosion damage on secondary alkali return diseases can be avoided.
(2) Compared with the acid liquor consumption of hundreds of liters in a single acid liquor spraying, the acid liquor spraying device can spray acid liquor for 100m 2 Only about 20L of functional agar polysaccharide aqueous solution is needed for removing disease crystals on the outer vertical surface (the area of the alkali return disease is 10%) of the structure, so that the consumption of the removing material is greatly reduced. And a large amount of acid solution is not required to be treated, so that the negative influence of the alkali return crystallization cleaning operation on the surrounding environment of the structure is avoided.
(3) The cleaning operation does not need workers to hold a high-pressure water gun and other equipment to carry out continuous spraying operation on the external surface, the gel is coated once and then is kept stand for 24 hours, after the gel slowly releases, acidifies and softens the crystals, the gel and the crystals can be easily removed by one-man operation, the process is simple, and a large amount of labor cost is saved.
(4) The gel is a slow-release weak-acid biological polysaccharide product and can be naturally degraded. The raw materials used are all natural plant extracts or associated environment-friendly reagents. Compared with the strong acid corrosive solution in the traditional process, the method has the outstanding environmental protection characteristics of no toxicity, no harm, low environmental load and the like.
Drawings
FIG. 1 is a comparative example of the area of the alkali-reverted crystals of samples before and after the series of experiments of example 1 of the present invention are carried out;
FIG. 2 is a comparison example of the area of the returned soda crystal of the sample before and after the series of experiments of example 2 of the present invention are performed;
FIG. 3 is a photograph of a crystalline material of a building alkali-returning crystal;
FIG. 4 is a photograph of the building soda-back crystals of FIG. 3 taken as a physical object 48h after being treated in example 4.
Detailed Description
The invention is further described in the following description and embodiments with reference to the drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Taking 100 parts of deionized water, wherein the agar powder meets 5 parts of high gel strength grade agar powder specified in GB 1886.239-2016, and the chemical formula of I type first-class oxalic acid crystallization in GB/T1626-2008 is as follows: HO 2 CCO 2 H·2H 2 0.006 part of oxalic acid crystal of O and 0.9 part of methylcellulose powder. Heating deionized water to boil at normal temperature and normal pressure, pouring agar powder to obtain a mixed solution A, continuously stirring the mixed solution A, maintaining the boiling state for 2 minutes, and supplementing water lost by boiling evaporation in the process according to boiling water quality monitoring to obtain an agar polysaccharide aqueous solution;
adding oxalic acid crystals and methylcellulose into the agar polysaccharide aqueous solution A, continuously heating and keeping stirring at a constant speed for 2 minutes under the condition of keeping the solution temperature at 95 ℃ to obtain a mixed solution B;
accurately weighing the water evaporation loss in the heating and stirring preparation process, weighing hot water with the temperature of 95 ℃ corresponding to the mass loss, supplementing the hot water into the mixed solution, continuously stirring the mixture uniformly, adjusting the heating system, reducing the temperature of the solution to 55 ℃, and cooling the solution to room temperature to obtain the alkali-returned crystal clearing material A1 on the surface of the biogel type structure.
Example 2
Taking 100 parts of deionized water, wherein the agar powder meets 5 parts of high gel strength grade agar powder specified in GB 1886.239-2016, and the chemical formula of I type first-class oxalic acid crystallization in GB/T1626-2008 is as follows: HO 2 CCO 2 H·2H 2 0.008 parts of oxalic acid crystal of O and 1 part of methylcellulose powder. Heating deionized water to boil at normal temperature and pressure, adding agar powder to obtain mixed solution A, stirring the mixed solution A continuously and maintaining boiling state for 2 min, and monitoring and supplementing water lost by boiling evaporation in the process according to boiling water quality to obtainAn aqueous solution of agar polysaccharide;
adding oxalic acid crystals and methylcellulose into the agar polysaccharide aqueous solution A, continuously heating and keeping stirring at a constant speed for 2 minutes under the condition of keeping the solution temperature at 95 ℃ to obtain a mixed solution B;
accurately weighing the water evaporation loss in the heating and stirring preparation process, weighing hot water with the temperature of 95 ℃ corresponding to the mass loss, supplementing the hot water into the mixed solution, continuously stirring the mixed solution uniformly, adjusting the heating system, reducing the temperature of the solution to 55 ℃, and cooling the solution to room temperature to obtain the biogel type structure surface alkali-returning crystal removal material A2.
Example 3
Taking 100 parts of deionized water, wherein the agar powder meets 5 parts of high gel strength grade agar powder specified in GB 1886.239-2016, and the chemical formula of I type first-class oxalic acid crystallization in GB/T1626-2008 is as follows: HO 2 CCO 2 H·2H 2 0.01 part of oxalic acid crystal of O and 0.9 part of methylcellulose powder. Heating deionized water to boil at normal temperature and normal pressure, pouring agar powder to obtain a mixed solution A, continuously stirring the mixed solution A, maintaining the boiling state for 2 minutes, and supplementing water lost in the boiling evaporation process according to the quality monitoring of boiling water to obtain an agar polysaccharide aqueous solution A2;
adding oxalic acid crystals and methylcellulose into the agar polysaccharide aqueous solution A, continuously heating and keeping stirring at a constant speed for 2 minutes under the condition of keeping the solution temperature at 95 ℃ to obtain a mixed solution B;
accurately weighing the water evaporation loss in the heating and stirring preparation process, weighing hot water with the temperature of 95 ℃ corresponding to the mass loss, supplementing the hot water into the mixed solution, continuously stirring the mixture uniformly, adjusting the heating system, reducing the temperature of the solution to 55 ℃, and cooling the solution to room temperature to obtain the alkaloid returning crystal clearing material on the surface of the biogel type structure.
Example 4
Taking 100 parts of deionized water, wherein the agar powder meets 5 parts of high gel strength grade agar powder specified in GB 1886.239-2016, and the chemical formula of I type first-class oxalic acid crystallization in GB/T1626-2008 is as follows: HO 2 CCO 2 H·2H 2 Oxalic acid crystal of O0.01 weight portions, methyl fiberAnd 1.1 parts of vitamin powder. Heating deionized water to boil at normal temperature and normal pressure, pouring agar powder to obtain a mixed solution A, continuously stirring the mixed solution A and maintaining the boiling state for 2 minutes, and supplementing water lost in the boiling evaporation process according to the quality monitoring of boiling water to obtain an agar polysaccharide aqueous solution;
adding oxalic acid crystals and methylcellulose into the agar polysaccharide aqueous solution A, continuously heating and keeping stirring at a constant speed for 2 minutes under the condition of keeping the solution temperature at 95 ℃ to obtain a mixed solution B;
accurately weighing the water evaporation loss in the heating and stirring preparation process, weighing hot water with the temperature of 95 ℃ corresponding to the mass loss, supplementing the hot water into the mixed solution, continuously stirring the mixture uniformly, adjusting the heating system, reducing the temperature of the solution to 55 ℃, and cooling the solution to room temperature to obtain the alkali-returned crystal clearing material A4 on the surface of the biogel type structure.
Comparative example 1
Taking 100 parts of deionized water, wherein the chemical formula of I-type first-grade oxalic acid crystal in GB/T1626-2008 standard is as follows: HO 2 CCO 2 H·2H 2 0.01 part of oxalic acid crystal of O and 1.1 parts of methylcellulose powder. Heating deionized water to boil at normal temperature and normal pressure, pouring oxalic acid crystals and methyl cellulose, continuously heating and stirring at a constant speed for 2 minutes under the condition of maintaining the temperature of the solution at 95 ℃ to obtain a mixed solution;
accurately weighing the water evaporation loss in the heating and stirring preparation process, weighing hot water with the temperature of 95 ℃ corresponding to the mass loss, supplementing the hot water into the mixed solution, continuously stirring the mixture uniformly, adjusting the heating system, reducing the temperature of the solution to 55 ℃, and cooling the solution to room temperature to obtain the structure surface alkali return crystal removal material D1.
Comparative example 2
Taking 100 parts of deionized water, wherein the agar powder meets 5 parts of high gel strength grade agar powder specified in GB 1886.239-2016, and the chemical formula of I type first-class oxalic acid crystallization in GB/T1626-2008 is as follows: HO 2 CCO 2 H·2H 2 0.01 part of oxalic acid crystal of O. Heating deionized water to boil at normal temperature and normal pressure, adding agar powder to obtain mixed solution A, continuously stirring mixed solution A and maintaining boilingIn the state of 2 minutes, supplementing water lost by boiling evaporation in the process according to the quality monitoring of boiling water to obtain an agar polysaccharide aqueous solution;
adding the oxalic acid crystal into the agar polysaccharide aqueous solution A, continuously heating and stirring at a constant speed for 2 minutes under the condition of maintaining the temperature of the solution at 95 ℃ to obtain a mixed solution B;
accurately weighing the water evaporation loss in the heating and stirring preparation process, weighing hot water with the temperature of 95 ℃ corresponding to the mass loss, supplementing the hot water into the mixed solution, continuously stirring the mixture uniformly, adjusting the heating system, reducing the temperature of the solution to 55 ℃, and cooling the solution to room temperature to obtain the alkali-returning crystal removal material D2 on the surface of the biogel type structure.
Comparative example 3
100 parts of deionized water, 5 parts of agar powder with high gel strength grade meeting the specification of GB 1886.239-2016 and 1.1 parts of methylcellulose powder. Heating deionized water to boil at normal temperature and normal pressure, pouring agar powder to obtain a mixed solution A, continuously stirring the mixed solution A, maintaining the boiling state for 2 minutes, and supplementing water lost by boiling evaporation in the process according to boiling water quality monitoring to obtain an agar polysaccharide aqueous solution;
adding methyl cellulose into the agar polysaccharide aqueous solution A, continuously heating under the condition of maintaining the solution temperature at 95 ℃, and stirring at a constant speed for 2 minutes to obtain a mixed solution B;
accurately weighing the water evaporation loss in the heating and stirring preparation process, weighing hot water with the temperature of 95 ℃ corresponding to the mass loss, supplementing the hot water into the mixed solution, continuously stirring the mixture uniformly, adjusting the heating system, reducing the temperature of the solution to 55 ℃, and cooling the solution to room temperature to obtain the structure surface alkali return crystal removal material D3.
Example 5
Preparing the surface of a sample for the alkali-return disease crystallization experiment of a black corrosion-resistant substrate, pretreating the surface of the sample, and cleaning the surface of the sample by deionized water to remove substances such as floating ash, impurities and the like.
S1: maintaining the temperature of the alkali-return crystal clearing material (A1-A4, D1-D3) on the surface of the biogel-type structure at 50-60 ℃;
s2: coating the surface of the biogel type structure with a returned alkali crystal cleaning material on the surface of a returned alkali crystal; waiting for the alkali-returning crystal clearing material on the surface of the biogel type structure to solidify (if the alkali-returning crystal clearing material can be solidified);
s3: standing for different times, waiting for the alkali return crystal clearing material on the surface of the biogel type structure to solidify, and stripping the alkali return crystal clearing material on the surface of the biogel type structure;
s4: and (3) checking the condition of returned alkali cleaning, shooting by using a body type microscope under the same illumination and shooting system, digitally converting the shot image into an 8bit file, carrying out image analysis on the binary image, and counting the change of the area average value of the white returned alkali disease of the sample.
TABLE 1
The attached figure 1 of the specification is an image contrast obtained by comparing the surface of an original alkali-returning disease crystallization test sample under the condition that an A1 sample is kept stand and reacts for 1 h;
description accompanying figure 2 is an image comparison obtained by comparing the surface of an original alkali-reversion damage crystallization test sample under the condition that an A1 sample is kept standing for 24 hours for reaction.
Description with respect to fig. 1:
the scavenging material a1 prepared according to the present invention was applied to the surface of the trona disease crystallization experimental sample of a black corrosion resistant substrate (a cumulative of 8 parallel samples).
The surface of the sample is pretreated, the crystal coverage area of the alkali-returning disease is more than 80%, and the thickness of the alkali-returning crystal is 1-3 mu m.
The thickness of the cleaning material is controlled to be 2 mm-3 mm after coating, the gel is peeled from the substrate by using tweezers after standing for 1h, and image files before and after the operation processing of the sample are compared (the image files are shot by a stereoscopic microscope under the same illumination and shooting system and are converted into 8bit files through digital codes), and the binaryzation is carried out on the image files for image analysis. The statistical calculation shows that the average value of the white alkali-returning disease area of the sample is reduced to 25.7 percent from 83.1 percent before treatment.
Description with respect to fig. 2:
the scavenging material a1 prepared according to the present invention was applied to the surface of the trona disease crystallization experimental sample of a black corrosion resistant substrate (a cumulative of 8 parallel samples).
The surface of the sample is pretreated, the crystal coverage area of the alkali-returning disease is more than 80%, and the thickness of the alkali-returning crystal is 1-3 mu m.
The thickness of the cleaning material is controlled to be 2 mm-3 mm after coating, the gel is peeled from the substrate by using tweezers after standing for 1h, and image files before and after the operation processing of the sample are compared (the image files are shot by a stereoscopic microscope under the same illumination and shooting system and are converted into 8bit files through digital codes), and the binaryzation is carried out on the image files for image analysis. The average value of the white alkali-returning disease area of the sample is reduced to 11.6 percent from the average value of 81.7 percent before treatment by statistical calculation.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. The material for removing the alkali-returning crystal on the surface of the biological gel type structure consists of 100 parts of water, 5-7 parts of agar powder, 0.006-0.01 part of oxalic acid crystal and 0.9-1.1 part of cellulose by mass.
2. The biogel structure surface alkali-returned crystal removal material as claimed in claim 1, wherein the agar powder is high gel strength grade agar powder meeting the specification of GB 1886.239-2016.
3. The biogel-type structure surface alkali-returning crystal removal material as claimed in claim 1, wherein oxalic acidThe chemical formula of the I-type first-class oxalic acid crystal in the GB/T1626-2008 standard is as follows: HO 2 CCO 2 H·2H 2 O。
4. The material as claimed in claim 1, wherein the cellulose is methylcellulose powder meeting the requirements of GB/T34263-2017 standard related physicochemical properties.
5. The method for preparing a surface reversion crystallization removal material for biogel type structures according to any one of claims 1 to 4, which comprises the steps of:
s1: preparing an agar polysaccharide aqueous solution, heating water to boil at normal temperature and normal pressure, pouring agar powder, continuously stirring and maintaining the boiling state for 1-5 minutes, and supplementing water lost in the boiling evaporation process according to the quality monitoring of boiling water to obtain the agar polysaccharide aqueous solution:
s2: preparing a functional agar polysaccharide aqueous solution, adding oxalic acid crystals and cellulose with a given mass into the agar polysaccharide aqueous solution, continuously heating and stirring at a constant speed for 1-5 minutes under the condition that the temperature of the solution is maintained to be higher than 90 ℃ to obtain a mixed solution;
s3: accurately weighing the water evaporation loss in the heating and stirring preparation process, weighing hot water with the mass loss being more than 90 ℃, supplementing the hot water into the mixed solution, continuously stirring the mixed solution uniformly, adjusting the heating system, and reducing the temperature of the solution to be within the range of 50-60 ℃ to prepare the material for removing the surface alkali-returning crystal of the biogel type structure.
6. The method as claimed in claim 5, wherein the water in step S1 is deionized water, and the stirring and boiling are maintained for 2-3 min.
7. The method for preparing the surface alkali-returning crystal clearing material of biogel-type structure as claimed in claim 5, wherein the time of uniform stirring in step S2 is 2-3 minutes.
8. The use of a biogel structure surface retro-alkali crystal removal material as claimed in claim 1,
s1: maintaining the temperature of the alkali-returning crystallization clearing material on the surface of the biogel type structure at 50-60 ℃;
s2: coating the surface of the biogel type structure with a returned alkali crystal cleaning material on the surface of a returned alkali crystal; waiting for the surface alkali returning crystallization cleaning material of the biogel type structure to solidify;
s3: repeating S1-S2, and brushing the alkali-returning crystallization clearing material on the surface of the biological gel type structure until the gel thickness is not less than 2 mm;
s4: standing for reaction for 1-2h, waiting for proper dehydration of the alkali-returning crystal clearing material on the surface of the biogel type structure, and stripping the alkali-returning crystal clearing material on the surface of the biogel type structure;
s5: checking the condition of alkali return cleaning, and repeating S1-S4 when the alkali return is remained.
9. The use of the material for removing alkali-returning crystals from the surface of a biogel-type structure as claimed in claim 8, wherein a scraper or scraper is used to strip and remove the alkali-returning crystals from the surface of a biogel-type structure in step S4.
10. The use of a biogel-type structure surface alkali-returned crystal removal material as claimed in claim 8, which further comprises a pre-treatment step, wherein the pre-treatment step comprises cleaning the surface of the building with alkali-returned crystals from dust, debris and ash, and cleaning the surface of the building with alkali-returned crystals with water.
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