CN113105813B - Special waterproof and compression-resistant coating for back surface of underground building, and preparation method and application method thereof - Google Patents
Special waterproof and compression-resistant coating for back surface of underground building, and preparation method and application method thereof Download PDFInfo
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/60—Additives non-macromolecular
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Abstract
The application relates to the field of coatings, and particularly discloses a special waterproof and compression-resistant coating for a back surface of an underground building, and a preparation method and a use method thereof. The special waterproof compression-resistant coating on the back surface of the underground building comprises a component A and a component B; the component A is prepared from the following raw materials in parts by weight: 60-70 parts of functional filler; 25-30 parts of a curing agent; 3-5 parts of a curing accelerator; 2-4 parts of a silane coupling agent; 70-90 parts of modified desulfurized gypsum; the functional filler is formed by mixing quicklime and cement; the component B is prepared from the following raw materials in parts by weight: 20-40 parts of polyether polyol; 50-70 parts of epoxy resin; 10-12 parts of a plasticizer; 13-18 parts of a diluent; 8-12 parts of an activity promoter. The special waterproof compression-resistant coating for the back surface of the underground building has better anti-permeability compression-resistant performance, and is a special coating for green buildings.
Description
Technical Field
The application relates to the technical field of coatings, in particular to a special waterproof and compression-resistant coating for a back surface of an underground building, and a preparation method and a use method thereof.
Background
The waterproof coating is a coating which can prevent rainwater or underground water from leaking through a coating film formed by the coating, and is widely applied to large-area coating of walls and bottom area top plates of underground garages, elevator shafts and the like because of good waterproof performance.
The flue gas desulfurization gypsum is a byproduct obtained by desulfurization and purification treatment of the flue gas of sulfur-containing fuel in a thermal power plant, has large emission and low cost, and has the same main components as natural gypsum, namely CaSO4·2H2And O, and simultaneously, the desulfurized gypsum also has the characteristics of high purity, stable components, small granularity, less harmful impurities and the like, and is gypsum with better quality. When the epoxy resin coating is produced, the main base material of the epoxy resin coating is accompanied by certain volume shrinkage in the curing process, the volume shrinkage is easy to cause stress cracking of the epoxy resin as a liquid molding material, and the volume shrinkage of the epoxy resin can be obviously improved and the stress cracking can be reduced by adding the desulfurized gypsum.
In view of the above-mentioned related technologies, when the desulfurized gypsum is used to prepare the epoxy resin coating, the water resistance and strength of the desulfurized gypsum are poor, thereby affecting the anti-permeability and anti-pressure performance of the coating.
Disclosure of Invention
In order to improve the impermeability and compressive strength of the epoxy resin coating, so that the prepared coating has better bonding strength, and meanwhile, the resource is saved, and the coating is green and environment-friendly, the application provides the special waterproof compressive coating for the back surface of the underground building, and the preparation method and the use method thereof.
The first aspect, this application provides a waterproof resistance to compression coating of underground building dorsal surface special type, adopts following technical scheme:
a special waterproof compression-resistant coating for the back surface of an underground building comprises a component A and a component B which are respectively and independently packaged;
the component A is prepared from the following raw materials in parts by weight:
60-70 parts of functional filler;
25-30 parts of a curing agent;
3-5 parts of a curing accelerator;
2-4 parts of a silane coupling agent KH 550;
70-90 parts of modified desulfurized gypsum;
the functional filler is formed by mixing fly ash, quicklime and cement, wherein the weight ratio of fly ash to quicklime to cement is 1 (0.6-0.8) to 1.2-1.4;
the component B is prepared from the following raw materials in parts by weight:
20-40 parts of polyether polyol;
50-70 parts of epoxy resin;
10-12 parts of a plasticizer;
13-18 parts of a diluent;
8-12 parts of an activity promoter.
By adopting the technical scheme, the component A and the component B are subjected to chemical reaction to be cured into a film, the film hardness, appearance and adhesion capability are obviously better than those of a single-component waterproof coating, and the application range is wide.
The desulfurized gypsum is an industrial byproduct gypsum obtained after sulfur dioxide in flue gas is treated by industrial enterprises burning coal or oil, and the desulfurized gypsum and natural gypsum have the same main components, so the desulfurized gypsum has very important processing and utilizing significance, not only effectively promotes the further development of national environment-friendly circular economy, but also greatly reduces the mining amount of the ore paste, protects resources, is green and environment-friendly, and simultaneously reduces the production cost of the enterprises. The desulfurized gypsum of the component B and the functional filler of the component A are mixed for use, so that the defect of poor water resistance of the desulfurized gypsum is effectively overcome, the permeability resistance and the pressure resistance of the mixed coating of the component A and the component B are improved, and the mixed coating has better waterproof and pressure resistance. Meanwhile, the desulfurized gypsum and the functional filler are mixed for use, so that the setting time of cement in the functional new filler can be improved, the mixed coating has proper drying and curing time, and the processability of the coating is improved.
The weight ratio of the coal ash, the quicklime and the cement in the functional filler is 1 (0.6-0.8) to 1.2-1.4), and within the range, the waterproof and compressive capacity of the mixed coating can be remarkably improved, so that the permeation pressure of the prepared mixed coating is more than or equal to 1.0MPa, and the compressive strength of the prepared mixed coating is more than or equal to 40 MPa.
Preferably, in the component A, the curing agent is formed by mixing an epoxy resin curing agent JA-1 and an epoxy curing agent Ancamide2717 according to the weight ratio of 1 (0.6-0.8).
By adopting the technical scheme, the epoxy resin curing agent JA-1 and the epoxy curing agent Ancamide2717 are jointly used, so that a better synergistic effect is shown, the total using amount of the curing agent is reduced, the effect that the original using amount of the curing agent is the same can be achieved, resources are saved, and the environment is protected.
Preferably, in the component B, the activity promoter is formed by mixing sodium sulfosuccinate and sodium lauroyl sarcosinate according to the weight ratio of 1 (0.8-1.2).
By adopting the technical scheme, the active accelerant is used as an additive in the coating, the compatibility and the stability of the raw materials of the coating can be increased, the sodium succinate sulfonate and the sodium lauroyl sarcosinate are mixed and used together, and compared with the single-component active accelerant with the same weight, the anti-permeability performance, the compressive strength, the bonding strength and other performances of the prepared coating can be obviously improved, so that the sodium succinate sulfonate and the sodium lauroyl sarcosinate have better synergistic effect.
Preferably, in the component A, the curing accelerator is one or more of 2,4, 6-tris (dimethylaminomethyl) phenol, N-dimethylaniline and 2-methylimidazole;
in the component B, the polyether polyol is one or two of TDIOL-2000 and TDIOL-400;
the epoxy resin is one or two of bisphenol A type epoxy resin and bisphenol F type epoxy resin;
the plasticizer is one or more of dinonyl phthalate, dibutyl phthalate and acetyl tributyl citrate;
the diluent is one or more of propylene glycol methyl ether, cardanol glycidyl ether and neopentyl glycol diglycidyl ether.
By adopting the technical scheme, in the construction process of the bi-component coating, the activity of the curing agent can be reduced due to the difference of construction environments or other conditions, such as low temperature and the like, and the activity of the curing agent is improved by adding the curing accelerator, so that a paint film can be dried smoothly.
The epoxy resin is used as a main base material of the main waterproof compression-resistant coating, has better alkali resistance and strong paint film adhesion, and simultaneously has better heat resistance and electrical insulation.
The plasticizer in the coating has the function of increasing the flexibility of a coating film, can effectively improve the brittleness of a coating base material to obtain better flexibility, and has better compatibility with a main matrix.
The thinner can improve the viscosity of the coating, facilitate the construction of the coating during use, and facilitate the mixing of the A component and the B component.
Preferably, in the component A, the modification method of the modified desulfurized gypsum comprises the following steps:
a1, crushing and sieving the desulfurized gypsum to obtain desulfurized gypsum powder with the grain size of 0.15-0.20 mm;
a2, adding the desulfurized gypsum powder obtained in A1 into a pickling solution, stirring and filtering to obtain a filter cake, adding the filter cake into deionized water, and stirring to obtain slurry;
a3, adding a modifier into the slurry obtained in A2, ultrasonically stirring for 3-4h at the temperature of 100-140 ℃, and drying until the water content is 10% after stirring to obtain the modified desulfurized gypsum.
By adopting the technical scheme, the process of the modification method of the desulfurized gypsum is simple, the conditions are convenient to control, the obtained modified desulfurized gypsum has better dispersibility in a matrix, the water content is reduced, the viscosity is reduced, the fluidity is increased, the operability of the coating is improved, and the mixing of the component A and the component B is convenient. Meanwhile, the compression resistance of the desulfurized gypsum is improved, and the compression strength of the prepared coating is further improved.
Preferably, in the A2, the acid washing solution is a nitric acid solution with a mass concentration of 1-2mol/L or a hydrochloric acid solution with a mass concentration of 1-2 mol/L;
the desulfurization gypsum powder grinding and the pickling solution are calculated according to the weight ratio, and the desulfurization gypsum powder grinding and the pickling solution are 1 (2-6);
the filter cake and the deionized water are calculated according to the weight ratio, and the filter cake and the deionized water are 1 (3-4).
By adopting the technical scheme, acid-soluble impurities in the desulfurized gypsum raw material can be removed by acid washing, the purity of the desulfurized gypsum is improved, the desulfurized gypsum is fully modified, and meanwhile, the modified desulfurized gypsum is modified in the weight ratio, so that the modification degree of the desulfurized gypsum is further improved, the compression resistance of the modified desulfurized gypsum is improved, and the compression strength of the coating is further improved.
Preferably, in A3, the modifier is formed by mixing a polyurethane modified phenolic resin and hydrolyzed polymaleic acid according to a weight ratio of 1 (1.6-2.0);
the slurry and the modifier are calculated according to the weight ratio, and the slurry and the modifier are 1 (0.06-0.08).
By adopting the technical scheme, the polyurethane modified phenolic resin has higher tensile strength, can enhance the crosslinking property between the desulfurized gypsum and other components, can improve the dispersibility of the desulfurized gypsum in a matrix by hydrolyzing polymaleic acid, and can be used together to ensure that the modified desulfurized gypsum and the functional filler are fully mixed and contacted during construction, thereby improving the anti-permeability and compressive strength of the coating.
In a second aspect, the application provides a preparation method of a special waterproof and pressure-resistant coating for a back surface of an underground building, which adopts the following technical scheme:
a preparation method of a special waterproof and compression-resistant coating for the back surface of an underground building comprises the following preparation steps: mixing the modified desulfurization gypsum, the functional filler and the silane coupling agent KH550, stirring for 30-40min at the rotation speed of 400-600rpm, adding the curing agent and the curing accelerator, and continuously stirring for 60-80min at the rotation speed of 600-800rpm to obtain a component A;
the preparation of the component B comprises the following steps: mixing the epoxy resin, the diluent and the polyether polyol, stirring for 40-60min at the rotation speed of 600-800rpm, adding the activity promoter and the plasticizer, and continuously stirring for 40-60min at the rotation speed of 600-800rpm to obtain the component B.
By adopting the technical scheme, the preparation method of the component A and the component B is simple, the condition requirement is lower, the preparation method is suitable for mass production and can realize stable preparation, the components are fully mixed under the condition, and the prepared component A and the component B have stable properties.
The application provides a use method of special waterproof and pressure-resistant coating for the back surface of an underground building, and the following technical scheme is adopted:
a use method of a special waterproof and pressure-resistant coating for a back surface of an underground building comprises the following steps:
b1, adding the component A into the component B, adding industrial water, and stirring at the rotating speed of 300-400rpm for 1-3h to obtain a coating finished product;
b2, cleaning the surface of the base layer to be coated, leaking the original concrete or masonry base surface, washing with clear water, and constructing without clear water;
and B3, during construction, brushing a finished coating on the surface of the base layer to be coated, wherein the brushing film-forming thickness is not less than 2 mm, and continuously brushing for 2-3 times after the film is completely formed.
By adopting the technical scheme, the component A, the component B and industrial water are mixed during construction, so that the bi-component coating has more appropriate drying time, the construction operability is improved, and the influence on use caused by the faster drying of the mixed coating in the coating process is avoided. During construction, according to the actual engineering quantity on site, the concrete is prepared as it is and is used as it is, and the use is convenient.
Preferably, in the B1, the components A, B and industrial water are added according to the weight ratio of the components A, B and water being 1 (0.8-1.2) to 0.07-0.09.
By adopting the technical scheme, when the waterproof and compressive coating is mixed and used according to the proportion, the waterproof and compressive coating has better film hardness and permeation resistance pressure, and the bonding strength of the waterproof and compressive coating can be improved. Meanwhile, within the range of the mixture ratio, the bi-component coating has more suitable drying time and is convenient to brush.
In summary, the present application has the following beneficial effects:
1. when the coating produced by the application is constructed, the desulfurized gypsum and the functional filler are mixed for use, so that the defect of poor water resistance of the desulfurized gypsum is effectively overcome, the anti-permeability and anti-pressure capacity of the mixed coating are improved, and meanwhile, as the main raw materials are industrial byproducts such as the fly ash, the quicklime, the desulfurized gypsum and the like, the coating also has the advantages of resource saving and environmental protection;
2. according to the application, the curing agent is formed by mixing the epoxy resin curing agent JA-1 and the epoxy curing agent Ancamide2717, and the curing agent and the epoxy resin curing agent show a good synergistic effect, so that the using amount of the curing agent is effectively reduced, the curing effect is not influenced, resources are saved, and the production cost is favorably reduced;
3. the application improves the dispersity of the desulfurized gypsum through modifying the desulfurized gypsum, reduces the water quantity and the viscosity of the desulfurized gypsum, increases the fluidity of the desulfurized gypsum, improves the operability of coating mixing during construction, enables the component A and the component B to be fully mixed, and improves the anti-permeability and anti-pressure capacity of the coating.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials used in the examples of the present application are commercially available, except for the following specific descriptions:
the silane coupling agent KH550 is obtained from Jinan Rong Guanghong chemical Co., Ltd., Cat number 01;
the fly ash is collected from the bright mineral product processing Limited company in the Lingshu county, the goods number is 542, and the fineness is 325-3000 meshes;
the quicklime is collected from Jianshi mineral powder factory in Lingshou county, with a cargo number of 7-22;
the cement is super-fine cement, model SPC, which is collected from Zhejiang three lion group Special cement Co., Ltd;
the desulfurized gypsum is collected from Shijiazhuang Vigorli mineral products, Inc., and the model is 200 meshes;
the epoxy resin curing agent JA-1 is obtained from Jinkang Yuxin materials Co., Ltd, and has a product number of KYX-005;
ancamide2717, an epoxy curing agent, was obtained from Guangzhou Jiujingsu chemical materials, Inc., cat 2717;
the sodium sulfosuccinate is obtained from chemical reagent of Guangdong Wengjiang, and is analytically pure;
sodium lauroyl sarcosinate is obtained from Purexing fine chemical engineering and is analyzed and purified;
2,4, 6-tri (dimethylaminomethyl) phenol is collected from Wuhan Cabband chemical Limited company, and the content is more than or equal to 99 percent;
the N, N-dimethylaniline is collected from Shanghai Kaiser chemical Co., Ltd, the purity is 99 percent, and the product number is 99-97-8;
2-methylimidazole is adopted in natural vibration daily chemical industry, the content is more than or equal to 99 percent, and the water content is less than or equal to 0.5 percent;
TDIOL-2000 is obtained from Tianjin petrochemical company of China petrochemical group asset management and management Limited and has a hydroxyl value of 54.5-57.5mg KOH/g;
TDIOL-400 is collected from Tianjin petrochemical company of China petrochemical group asset management and management Limited, and has a hydroxyl value of 270-;
the bisphenol A epoxy resin is obtained from new materials of Jinan Showa Dengyi Co., Ltd, and has the mark of CYD-128 and the epoxy value of 0.47-0.55mol/100 g;
the bisphenol F type epoxy resin is collected from Shanghai Kaiyn chemical Co., Ltd, the mark is NPEF-170, and the epoxy value is 0.44-0.56mol/100 g;
dinonyl phthalate is obtained from Kaiser chemical Co., Ltd, Shanghai, with a purity of 99% and a product number of 84-76-4;
dibutyl phthalate is obtained from chemical industry ltd, guangyu, dennan, industrial grade;
the acetyl tributyl citrate is obtained from the Shandong Chang Yao new materials Co., Ltd, industrial grade, model CH-4188960;
propylene glycol methyl ether is obtained from the chemical industry Limited company of Minxin of Jinan, the industrial grade, and the content is more than or equal to 99 percent;
the cardanol glycidyl ether is obtained from Suzhou envonic Biotechnology Limited, model 99;
neopentyl glycol diglycidyl ether is collected from Conditis chemical engineering (Hubei) Co., Ltd, the content is more than or equal to 99 percent, and the product is kds 8974564;
the polyurethane modified phenolic resin is obtained from complexing high-new materials (Shanghai) company Limited under the trademark EPU-618, the solid content is 99.9%, the viscosity is 70-80mPas, the product number is 2082400202, and the product is industrial grade;
the hydrolyzed polymaleic acid is collected from Zhengzhou Ruichang chemical products Co., Ltd, industrial grade, with the content of 99.9%.
Preparation example
Preparation example 1
A modified desulfurized gypsum is prepared by the following steps:
a1, crushing and sieving the desulfurized gypsum to obtain desulfurized gypsum powder with the grain size of 0.15 mm;
a2, adding the desulfurized gypsum powder obtained in A1 into a nitric acid solution with the mass concentration of 1mol/L and the weight of 2 times that of the desulfurized gypsum powder, stirring for 10min at the rotating speed of 200rpm, filtering to obtain a filter cake, adding the filter cake into deionized water with the weight of 3 times that of the filter cake, and stirring to obtain slurry;
a3, adding a modifier into the slurry obtained in A2, ultrasonically stirring for 4 hours at the temperature of 100 ℃ and the frequency of 28kHz, and drying at the temperature of 200 ℃ after stirring till the water content is 10% to obtain the modified desulfurized gypsum, wherein the slurry and the modifier are calculated according to the weight ratio, the slurry is 1:0.06, and the modifier is formed by mixing polyurethane modified phenolic resin and hydrolyzed polymaleic acid according to the weight ratio of 1: 1.6.
Preparation example 2
A modified desulfurized gypsum is prepared by the following steps:
a1, crushing the desulfurized gypsum, and sieving to obtain desulfurized gypsum powder with the particle size of 0.18 mm;
a2, adding the desulfurized gypsum powder obtained in A1 into a nitric acid solution with the mass concentration of 1.5mol/L and the weight of 4 times that of the desulfurized gypsum powder, stirring for 10min at the rotating speed of 200rpm, filtering to obtain a filter cake, adding the filter cake into deionized water with the weight of 3.5 times that of the filter cake, and stirring to obtain slurry;
a3, adding a modifier into the slurry obtained in A2, ultrasonically stirring for 3.5 hours at the temperature of 120 ℃ and the frequency of 28kHz, and drying at the temperature of 200 ℃ after stirring till the water content is 10% to obtain the modified desulfurized gypsum, wherein the slurry and the modifier are calculated according to the weight ratio, the slurry is 1:0.07, and the modifier is formed by mixing polyurethane modified phenolic resin and hydrolyzed polymaleic acid according to the weight ratio of 1: 1.6.
Preparation example 3
A modified desulfurized gypsum is prepared by the following steps:
a1, crushing and sieving the desulfurized gypsum to obtain desulfurized gypsum powder with the grain size of 0.20 mm;
a2, adding the desulfurized gypsum powder obtained in A1 into a nitric acid solution with the mass concentration of 2mol/L and the weight of 6 times that of the desulfurized gypsum powder, stirring for 10min at the rotating speed of 200rpm, filtering to obtain a filter cake, adding the filter cake into deionized water with the weight of 4 times that of the filter cake, and stirring to obtain slurry;
a3, adding a modifier into the slurry obtained in A2, ultrasonically stirring for 3 hours at the temperature of 140 ℃ and the frequency of 28kHz, and drying at the temperature of 200 ℃ after stirring till the water content is 10% to obtain the modified desulfurized gypsum, wherein the weight ratio of the slurry to the modifier is 1:0.08, and the modifier is formed by mixing polyurethane modified phenolic resin and hydrolyzed polymaleic acid according to the weight ratio of 1: 1.6.
Preparation example 4
A modified desulfurized gypsum is different from the modified desulfurized gypsum prepared in preparation example 1 in that a modifier is prepared by mixing polyurethane modified phenolic resin and hydrolyzed polymaleic acid in a weight ratio of 1: 1.8.
Preparation example 5
A modified desulfurized gypsum is different from the desulfurized gypsum prepared in preparation example 1 in that a modifier is prepared by mixing polyurethane modified phenolic resin and hydrolyzed polymaleic acid in a weight ratio of 1:2.
Examples
Example 1
A special waterproof and pressure-resistant coating for the back surface of an underground building comprises a component A and a component B which are packaged independently.
The components in the component A and the corresponding weight thereof are shown in Table 1 and are prepared by the following steps: mixing the modified desulfurized gypsum, the functional filler and the silane coupling agent KH550, stirring at the rotating speed of 500rpm for 35min, adding the curing agent and the curing accelerator, and continuously stirring at the rotating speed of 700rpm for 70min to obtain a component A;
wherein, the modified desulfurized gypsum is prepared by the preparation example 2;
the functional filler is formed by mixing fly ash, quicklime and cement according to the weight ratio of 1:0.7: 1.5;
the curing agent is formed by mixing an epoxy resin curing agent JA-1 and an epoxy curing agent Ancamide2717 according to the weight ratio of 1:0.7 of the epoxy resin curing agent JA-1 to the epoxy curing agent Ancamide 2717;
2,4, 6-tri (dimethylaminomethyl) phenol is adopted as the curing accelerator.
The component B is shown in Table 2, and is prepared by the following steps: mixing epoxy resin, a diluent and polyether polyol, stirring for 50min at the rotating speed of 700rpm, adding an active accelerant and a plasticizer, and continuously stirring for 50min at the rotating speed of 700rpm to obtain a component B;
wherein the epoxy resin is bisphenol A epoxy resin;
the diluent adopts propylene glycol methyl ether;
the polyether polyol adopts TDIOL-2000;
the plasticizer adopts dinonyl phthalate;
the activity promoter is formed by mixing sodium succinate sulfonate and sodium lauroyl sarcosinate according to the weight ratio of 1:1.
When in construction, the method is used through the following steps:
b1, adding the component A into the component B, adding industrial water, and stirring at the rotating speed of 350rpm for 2 hours to obtain a finished coating product, wherein the dosage of the component A is 10kg, the dosage of the component B is 8kg, and the dosage of the water is 0.7 kg;
b2, cleaning the surface of the base layer to be coated, leaking the original concrete or masonry base surface, washing with clear water, and constructing without clear water;
and B3, during construction, brushing the finished coating on the surface of the base layer to be coated, wherein the brushing thickness is not less than 2 mm, and brushing is continued for 2-3 times after complete film formation.
Examples 2 to 6
The special waterproof and pressure-resistant coating for the back water surface of the underground building is different from the coating in example 1 in that the components in the component A and the corresponding weights thereof are shown in table 1, and the components in the component B and the corresponding weights thereof are shown in table 2.
TABLE 1 EXAMPLES 1-6 the components of the A component and their weights (kg)
TABLE 2 Components and their weights (kg) in the B component of examples 1-6
Example 7
The special waterproof and pressure-resistant coating for the back surface of the underground building is different from the coating in the embodiment 1 in that the functional filler in the component A is formed by mixing fly ash, quicklime and cement according to the weight ratio of 1:0.6: 1.4.
Example 8
The special waterproof and pressure-resistant coating for the back surface of the underground building is different from that in the embodiment 1 in that the functional filler in the component A is formed by mixing fly ash, quicklime and cement according to the weight ratio of 1:0.8: 1.7.
Example 9
The special waterproof and pressure-resistant coating for the back surface of the underground building is different from the embodiment 1 in that a curing agent in a component A is formed by mixing an epoxy resin curing agent JA-1 and an epoxy curing agent Ancamide2717 according to the weight ratio of 1:0.6 of the epoxy resin curing agent JA-1 to the epoxy curing agent Ancamide 2717.
Example 10
A special waterproof and pressure-resistant coating for the back surface of an underground building is different from that in the embodiment 1 in that a curing agent in a component A is formed by mixing an epoxy resin curing agent JA-1 and an epoxy curing agent Ancamide2717 according to the weight ratio of 1:0.8 of the epoxy resin curing agent JA-1 to the epoxy curing agent Ancamide 2717.
Example 11
The special waterproof and pressure-resistant coating for the back surface of the underground building is different from that in the embodiment 1 in that the activity promoter in the component B is formed by mixing sodium succinate sulfonate and sodium lauroyl sarcosinate according to the weight ratio of 1:0.8 of sodium succinate sulfonate to sodium lauroyl sarcosinate.
Example 12
The special waterproof and pressure-resistant coating for the back surface of the underground building is different from that in the embodiment 1 in that the activity promoter in the component B is formed by mixing sodium succinate sulfonate and sodium lauroyl sarcosinate according to the weight ratio of 1:1.2 of sodium succinate sulfonate to sodium lauroyl sarcosinate.
Example 13
A special waterproof and pressure-resistant coating for the back surface of an underground building is different from that of the example 1 in that in the component A, the modified desulfurized gypsum is prepared by the preparation example 1.
Example 14
A special waterproof and pressure-resistant coating for the back surface of an underground building is different from that of example 1 in that in the component A, modified desulfurized gypsum is prepared by preparation example 3.
Example 15
A special waterproof and pressure-resistant coating for the back surface of an underground building is different from that of example 1 in that in the component A, modified desulfurized gypsum is prepared by preparation example 4.
Example 16
The special waterproof and pressure-resistant coating for the back surface of the underground building is different from that in example 1 in that in the component A, modified desulfurized gypsum is prepared in preparation example 5.
Example 17
The special waterproof and pressure-resistant coating for the back surface of the underground building is different from that in the embodiment 1 in that the coating is used by the following steps during construction:
b1, adding the component A into the component B, adding industrial water, and stirring at the rotating speed of 300rpm for 3 hours to obtain a finished coating product, wherein the dosage of the component A is 10kg, the dosage of the component B is 10kg, and the dosage of the water is 0.8 kg;
b2, cleaning the surface of the base layer to be coated, leaking the original concrete or masonry base surface, washing with clear water, and constructing without clear water;
and B3, during construction, brushing a finished coating on the surface of the base layer to be coated, wherein the brushing film-forming thickness is not less than 2 mm, and continuously brushing for 2-3 times after the film is completely formed.
Example 18
The special waterproof and pressure-resistant coating for the back surface of the underground building is different from that of the embodiment 1 in that the special waterproof and pressure-resistant coating is used by the following steps during construction:
b1, adding the component A into the component B, adding industrial water, and stirring at the rotating speed of 400rpm for 1h to obtain a finished coating product, wherein the dosage of the component A is 10kg, the dosage of the component B is 12kg, and the dosage of the water is 0.9 kg;
b2, cleaning the surface of the base layer to be coated, leaking the original concrete or masonry base surface, washing with clear water, and constructing without clear water;
and B3, during construction, brushing a finished coating on the surface of the base layer to be coated, wherein the brushing film-forming thickness is not less than 2 mm, and continuously brushing for 2-3 times after the film is completely formed.
Comparative example
Comparative example 1
A coating which differs from example 1 in that the a component does not contain a functional filler.
Comparative example 2
A coating differing from example 1 in that in component a, the functional filler was 60kg fly ash.
Comparative example 3
A coating material was different from example 1 in that in the component A, the functional filler was composed of 30kg of fly ash mixed with 30kg of cement.
Comparative example 4
The coating is different from the coating in the embodiment 1 in that the functional filler in the component A is formed by mixing fly ash, quicklime and cement according to the weight ratio of 1:0.4: 1.4.
Comparative example 5
The coating is different from the coating in the embodiment 1 in that the functional filler in the component A is formed by mixing fly ash, quicklime and cement according to the weight ratio of 1:0.6: 1.2.
Comparative example 6
The coating is different from the coating in the embodiment 1 in that the functional filler in the component A is formed by mixing fly ash, quicklime and cement according to the weight ratio of 1:1: 2.
Comparative example 7
A coating is different from the coating in the embodiment 1 in that the curing agent in the component A is formed by mixing an epoxy resin curing agent JA-1 and an epoxy curing agent Ancamide2717 according to the weight ratio of 1:0.4 of the epoxy resin curing agent JA-1 to the epoxy curing agent Ancamide 2717.
Comparative example 8
A coating is different from the coating in the embodiment 1 in that the curing agent in the component A is formed by mixing an epoxy resin curing agent JA-1 and an epoxy curing agent Ancamide2717 according to the weight ratio of 1:1 to 1:1.
Comparative example 9
A coating material which differs from example 1 in that the curing agent in component A was 25kg of epoxy resin curing agent JA-1.
Comparative example 10
A coating composition which differs from that of example 1 in that the curing agent in the A component is 25kg of Ancamide2717, an epoxy curing agent.
Comparative example 11
A coating is different from the coating in example 1 in that the activity promoter in the component B is formed by mixing sodium sulfosuccinate and sodium lauroyl sarcosinate according to the weight ratio of 1: 0.6.
Comparative example 12
The coating is different from the coating in example 1 in that the activity promoter in the component B is formed by mixing sodium succinate sulfonate and sodium lauroyl sarcosinate according to the weight ratio of 1: 1.4.
Comparative example 13
A coating material which is different from that of example 1 in that the activity promoter in the component B is 8kg of sodium sulfosuccinate.
Comparative example 14
A coating composition which differs from that of example 1 in that the activity promoter in component B is 8kg of sodium lauroyl sarcosinate.
Comparative example 15
A coating material which differs from example 1 in that in the component A, the same amount by weight of desulfurized gypsum is used in place of the modified desulfurized gypsum.
Comparative example 16
The coating is different from the coating in example 1 in that a modifier is formed by mixing polyurethane modified phenolic resin and hydrolyzed polymaleic acid according to the weight ratio of 1:1.4 when preparing modified desulfurized gypsum.
Comparative example 17
A coating material is different from the coating material in example 1 in that a modifier is prepared by mixing a polyurethane modified phenolic resin and hydrolyzed polymaleic acid in a weight ratio of 1: 2.2.
Comparative example 18
A coating material is different from the coating material of example 1 in that, in construction, the component A of B1 is used in an amount of 10kg, the component B of B1 is used in an amount of 10kg, and water is used in an amount of 2 kg.
Comparative example 19
A coating material is different from the coating material of example 1 in that, during construction, the component A of B1 is 10kg, the component B of B1 is 10kg, and the water of B is 0.5 kg.
Comparative example 20
A coating material is different from the coating material of example 1 in that, in construction, the component A of B1 is used in an amount of 10kg, the component B of B1 is used in an amount of 6kg, and the amount of water is used in an amount of 0.8 kg.
Comparative example 21
A coating material is different from the coating material of example 1 in that, in construction, the component A of B1 is used in an amount of 10kg, the component B of B1 is used in an amount of 15kg, and the amount of water is used in an amount of 0.8 kg.
Performance test
The coatings prepared in examples 1-18 and comparative examples 1-21 are respectively taken as test objects, and the impermeability and compressive strength of the coatings are tested by referring to the impermeability test method in GB/T23445-; testing the solid content, the bonding strength, the surface drying time and the actual drying time of the coating by referring to GB/T16777-2008; the test results are reported in table 3 below.
Table 3 results of performance testing
As can be seen from the test data in table 3: the special waterproof compression-resistant coating for the back surface of the underground building prepared in the embodiment of the application has the advantages that the permeation pressure resistance is more than or equal to 1.0MPa, the compression strength is more than or equal to 40MPa, the bonding strength is more than or equal to 3.0MPa, and the solid content is more than or equal to 92%.
It can be seen from the combination of examples 1, 7 and 8 and comparative examples 1 to 6 and the combination of Table 3 that, in the examples of the present application, the permeability and compression resistance of the coating can be significantly improved by mixing the functional filler with the modified desulfurized gypsum during the construction, and at the same time, the coating has better adhesive strength and higher solid content, and the effect is the best when the functional filler is formed by mixing the fly ash, the quicklime and the cement in the weight ratio of 1 (0.6-0.8) to 1.4-1.7. Therefore, the functional filler and the modified desulfurized gypsum are mixed for use, and the coating has a good synergistic effect on the aspect of improving the impermeability and pressure resistance of the coating.
By combining examples 1, 9 and 10 with comparative examples 7 to 10 and table 3, it can be seen that the coating prepared in example 1 has better permeation pressure resistance and compressive strength compared to the coating prepared in comparative example 9 and comparative example 10 using the same quality of one-component curing agent by using both epoxy resin curing agent JA-1 and epoxy curing agent Ancamide2717 in example 1, thereby showing that both epoxy resin curing agent JA-1 and epoxy curing agent Ancamide2717 have synergistic effect and the amount of curing agent can be reduced without affecting the curing effect. Meanwhile, when the epoxy resin curing agent JA-1 and the epoxy curing agent Ancamide2717 are mixed according to the weight ratio of 1 (0.6-0.8), the better effect is achieved.
In combination with examples 1, 11, 12 and comparative examples 11 to 14, and in combination with table 3, it can be seen that when sodium sulfosuccinate and sodium lauroyl sarcosinate are mixed in example 1 of the present application, the coating material prepared in example 1 has better osmotic pressure resistance and compressive strength than when a single-component activity promoter of the same quality is used in comparative example 13 and comparative example 14, thereby showing that the sodium sulfosuccinate and sodium lauroyl sarcosinate have a synergistic effect and can be reduced in the amount of the activity promoter without affecting the effect thereof. Meanwhile, the sodium sulfosuccinate and the sodium lauroyl sarcosinate are mixed according to the weight ratio of 1 (0.8-1.2), the effect is best.
It can be seen from the combination of examples 1, 13 to 16 and comparative examples 15 to 17, and from Table 3 that the coating material prepared using the modified desulfurized gypsum of example 1 of the present application has better compressive strength against permeation and bond strength than the coating material prepared using the unmodified desulfurized gypsum of comparative example 15, and during the preparation of the modified desulfurized gypsum, when the modifier is prepared from polyurethane modified phenolic resin and hydrolyzed polymaleic acid according to the weight ratio of 1: (1.6-2.0) the coatings obtained have better impermeability to compression, which is analyzed because, the desulfurization gypsum is modified under the conditions, so that the dispersibility of the modified desulfurization gypsum is improved, the water content and the viscosity of the modified desulfurization gypsum are reduced, the operability of the coating is further improved, and meanwhile, the component A and the component B can be more fully mixed.
Combining examples 1, 17, 18 and comparative examples 18 to 21, and combining Table 3, it can be seen that when the A component, the B component and the industrial water are mixed and used in the weight ratio of 1 (0.8-1.2) to (0.07-0.09) during construction, the resulting finished coating has better anti-permeability and anti-compression properties and bonding strength.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (4)
1. A special waterproof and pressure-resistant coating for the back surface of an underground building is characterized by comprising a component A and a component B which are independently packaged respectively;
the component A is prepared from the following raw materials in parts by weight:
60-70 parts of functional filler;
25-30 parts of a curing agent;
3-5 parts of a curing accelerator;
2-4 parts of a silane coupling agent KH 550;
70-90 parts of modified desulfurized gypsum;
the functional filler is formed by mixing fly ash, quicklime and cement, wherein the weight ratio of fly ash to quicklime to cement is 1 (0.6-0.8) to 1.2-1.4;
the modification method of the modified desulfurization gypsum comprises the following steps:
a1, crushing and sieving the desulfurized gypsum to obtain desulfurized gypsum powder with the grain size of 0.15-0.20 mm;
a2, adding the desulfurized gypsum powder obtained in A1 into the pickling solution, stirring and filtering to obtain a filter cake, adding the filter cake into deionized water, and stirring to obtain slurry;
a3, adding a modifier into the slurry obtained in A2, ultrasonically stirring for 3-4h at the temperature of 100-140 ℃, and drying after stirring until the water content is 10% to obtain modified desulfurized gypsum;
in the step A2, the pickling solution is a nitric acid solution with the mass concentration of 1-2mol/L or a hydrochloric acid solution with the mass concentration of 1-2 mol/L;
the desulfurization gypsum powder grinding and the pickling solution are calculated according to the weight ratio, and the desulfurization gypsum powder grinding and the pickling solution are 1 (2-6);
the filter cake and the deionized water are calculated according to the weight ratio, and the filter cake is 1 (3-4) of the deionized water;
in the A3, the modifier is formed by mixing polyurethane modified phenolic resin and hydrolyzed polymaleic acid according to the weight ratio of 1 (1.6-2.0);
the slurry and the modifier are calculated according to the weight ratio, the slurry and the modifier are 1 (0.06-0.08);
the component B is prepared from the following raw materials in parts by weight:
20-40 parts of polyether polyol;
50-70 parts of epoxy resin;
10-12 parts of a plasticizer;
13-18 parts of a diluent;
8-12 parts of an activity promoter;
in the component A, the curing agent is formed by mixing an epoxy resin curing agent JA-1 and an epoxy curing agent Ancamide2717 according to the weight ratio of 1 (0.6-0.8);
in the component B, the activity promoter is formed by mixing sodium sulfosuccinate and sodium lauroyl sarcosinate according to the weight ratio of 1 (0.8-1.2).
2. The special waterproof and pressure-resistant paint for the back surface of the underground building as claimed in claim 1, wherein in the component A, the curing accelerator is one or more of 2,4, 6-tris (dimethylaminomethyl) phenol, N-dimethylaniline and 2-methylimidazole;
in the component B, the polyether polyol is one or two of TDIOL-2000 and TDIOL-400;
the epoxy resin is one or two of bisphenol A type epoxy resin and bisphenol F type epoxy resin;
the plasticizer is one or more of dinonyl phthalate, dibutyl phthalate and acetyl tributyl citrate;
the diluent is one or more of propylene glycol methyl ether, cardanol glycidyl ether and neopentyl glycol diglycidyl ether.
3. The preparation method of the special waterproof and pressure-resistant coating for the back surface of the underground building as claimed in any one of claims 1 to 2, characterized in that the component A is prepared by the following steps: mixing the modified desulfurization gypsum, the functional filler and the silane coupling agent KH550, stirring for 30-40min at the rotation speed of 400-600rpm, adding the curing agent and the curing accelerator, and continuously stirring for 60-80min at the rotation speed of 600-800rpm to obtain a component A;
the preparation steps of the component B are as follows: mixing the epoxy resin, the diluent and the polyether polyol, stirring for 40-60min at the rotating speed of 600-800rpm, adding the activity promoter and the plasticizer, and continuously stirring for 40-60min at the rotating speed of 600-800rpm to obtain the component B.
4. The use method of the special waterproof and pressure-resistant coating for the back surface of the underground building as claimed in any one of claims 1 to 2 is characterized by comprising the following steps:
b1, adding the component A into the component B, adding industrial water, and stirring at the rotating speed of 300-400rpm for 1-3h to obtain a coating finished product;
b2, cleaning the surface of the base layer to be coated, leaking the original concrete or masonry base surface, washing with clear water, and constructing without clear water;
b3, during construction, brushing the finished coating on the surface of the base layer to be coated, wherein the brushing thickness is not less than 2 mm, and brushing is continued for 2-3 times after complete film formation;
in the B1, the addition amounts of the component A, the component B and the industrial water are added according to the weight ratio of the component A to the component B to the industrial water of 1 (0.8-1.2) to 0.07-0.09.
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