CN113943139A - Adhesive for fabricated building and preparation method thereof - Google Patents
Adhesive for fabricated building and preparation method thereof Download PDFInfo
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- CN113943139A CN113943139A CN202111312348.0A CN202111312348A CN113943139A CN 113943139 A CN113943139 A CN 113943139A CN 202111312348 A CN202111312348 A CN 202111312348A CN 113943139 A CN113943139 A CN 113943139A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00637—Uses not provided for elsewhere in C04B2111/00 as glue or binder for uniting building or structural materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses an adhesive for an assembly type building and a preparation method thereof, belonging to the technical field of building materials. The bonding extrusion comprises the following raw materials in parts by weight: 32-38 parts of a cementing material, 45-52 parts of an aggregate, 4-8 parts of phosphorylated hydroxypropyl methyl cellulose, 1-1.5 parts of calcium formate, 6-9 parts of water, 1.5-2 parts of water glass and 0.8-1.2 parts of polyacrylate emulsion. According to the invention, by phosphorylating hydroxypropyl methyl cellulose and adding starch, the cross permeation and mechanical entanglement of the phosphorylated hydroxypropyl methyl cellulose are realized, the forced mutual compatibility and synergistic effect are realized, the cohesiveness and strength of the system are greatly improved, a certain water retention function is given to the system, and then neopentyl glycol diglycidyl ether is added for cross-linking reaction, so that the cohesiveness is higher, and the falling-off phenomenon of an adhesive is avoided; meanwhile, the adhesive system is more stable, is suitable for various building complex environments, and is firm and not easy to break.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to an adhesive for an assembly type building and a preparation method thereof.
Background
In recent years, the assembly type building is more and more popular with people due to the advantages of high construction speed, low cost, high labor efficiency, effective reduction of dust pollution, noise pollution, water pollution and the like, and has wide development prospect in the field of urban building in the future. In assembly type construction engineering, the adhesive has very wide and important application, can connect different members in the construction engineering, can play the roles of sealing, fixing, corrosion prevention, moisture prevention and the like, and can also reinforce and maintain the construction engineering structure.
The building structure adhesive has the main functions of reinforcing a building structure which does not meet the mechanical property to meet the standard requirement of the building structure, and needs to meet higher bonding strength for an assembled building, so the performance requirement of the building structure adhesive is very high, the building structure adhesive has good mechanical property, and needs to meet other requirements in various aspects, such as good toughness, high safety and reliability, small waxy variable, good heat resistance, good creep resistance, strong humidity and heat aging resistance, good durability and the like. Because safety accidents are caused if adhesives with poor performance are used, the requirements for the adhesives are much higher than those of other adhesives, so that the safety of buildings can be ensured.
The adhesive is an indispensable basic raw material in building materials, and under the requirements of indexes such as environmental protection, aging resistance and the like, the research and development technology and the production technology of the adhesive are rapidly developed, and new products in the market are continuously emerged. At the present stage, because the traditional adhesive contains harmful substances such as free formaldehyde, benzene series and the like, the production process is complex, wastewater, waste and the like are easily generated, and meanwhile, the performance of the adhesive for the building engineering at the present stage is unstable, the conditions of cracks, efflorescence and the like are easily generated at the bonding part, production accidents are easily caused, and the building standards and requirements can not be well met.
Therefore, how to solve the inherent defects of the current adhesives in the construction industry to make the adhesives better play a role is a problem to be solved urgently.
Disclosure of Invention
The invention provides a high-strength adhesive for an assembly type building and a preparation method thereof, and the adhesive has the advantages of good viscosity, good stability, good compressive and flexural strength and tensile bonding strength, good workability, good water retention performance and comprehensive performance completely meeting the requirements of the field of building materials.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the adhesive for the fabricated building is prepared from the following raw materials in parts by weight: 32-38 parts of a cementing material, 45-52 parts of an aggregate, 4-8 parts of phosphorylated hydroxypropyl methyl cellulose, 1-1.5 parts of calcium formate, 6-9 parts of water, 1.5-2 parts of water glass and 0.8-1.2 parts of polyacrylate emulsion.
Further, the cementing material is composed of portland cement, fly ash and slag, and the mass ratio is as follows: cement: fly ash: slag 80:15: 5.
The cement is preferably 42.5 common Portland cement, the 28d mortar compressive strength of the cement is more than or equal to 50MPa, the water consumption of the standard consistency of the cement is less than or equal to 27 percent, and the specific surface area is more than or equal to 400m2/kg。
The preferential specific surface area of the fly ash is 850m2/kg～1380m2Perkg, belonging to national standard I-grade fly ash.
The slag is preferably slag micropowder with grade of S95 and above and specific surface area of 420m2/kg～480m2/kg。
Furthermore, the aggregate is river sand particles with the particle size of less than or equal to 2.26mm, the morphology of the river sand particles meets the requirement that the equivalent ellipse perimeter ratio AIEEP is less than or equal to 1.15, and the water content is less than or equal to 0.5 percent after drying treatment.
Further, the preparation method of the phosphorylated hydroxypropyl methyl cellulose comprises the following steps: adding water into sodium dihydrogen phosphate to dissolve, stirring at high speed to dissolve to obtain a solution with a mass concentration of 20%, adjusting pH to 4-5 with 1mol/L NaOH, adding starch and hydroxypropyl methylcellulose according to a mass ratio of 2:1, and stirring for 1-2 h; and adding neopentyl glycol diglycidyl ether accounting for 2 percent of the mass of the mixed solution, magnetically stirring for 1-2 hours at the constant temperature of 45-55 ℃, washing with water, centrifuging, and drying to obtain a cross-linked product, namely the phosphorylated hydroxypropyl methyl cellulose.
Further, the hydroxypropylmethylcellulose has a viscosity of not less than 100000 mPa-s.
Further, the modulus of the water glass is 2.0-3.0.
Further, the water glass has a modulus of 2.6.
Further, the solid content of the polyacrylate emulsion is more than or equal to 45%.
A preparation method of the adhesive for the fabricated building comprises the following steps:
(1) screening and drying river sand;
(2) adding water into sodium dihydrogen phosphate to dissolve, stirring at high speed to dissolve to obtain a solution with a mass concentration of 20%, adjusting pH to 4-5 with 1mol/L NaOH, adding starch and hydroxypropyl methylcellulose according to a mass ratio of 2:1, and stirring for 1-2 h; adding neopentyl glycol diglycidyl ether accounting for 2% of the mass of the mixed solution, magnetically stirring for 1-2 hours at a constant temperature of 45-55 ℃, washing with water, centrifuging, and drying to obtain a cross-linked product, namely the phosphorylated hydroxypropyl methyl cellulose;
(3) preparing a dry material: adding the gel material, the aggregate and the phosphorylated hydroxypropyl methyl cellulose into a stirrer according to parts by weight, stirring and uniformly mixing to form a dry component A of the binder;
(4) preparing a water material: putting water, water glass and polyacrylate emulsion in parts by weight into a stirring container for stirring,
forming the water component B of the binder, and separately sealing and storing the dry component A and the water component B.
When in use, the dry component A and the water-based component B are uniformly mixed in equal mass.
Compared with the prior art, the technical scheme of the invention has the outstanding beneficial effects that:
(1) the adhesive is suitable for various building environments, and has high adhesion and good stability;
(2) according to the invention, by phosphorylating hydroxypropyl methyl cellulose and adding starch, the cross permeation and mechanical entanglement of the phosphorylated hydroxypropyl methyl cellulose are realized, the forced mutual compatibility and synergistic effect are realized, the cohesiveness and strength of the system are greatly improved, a certain water retention function is given to the system, and then neopentyl glycol diglycidyl ether is added for cross-linking reaction, so that the cohesiveness is higher, and the falling-off phenomenon of an adhesive is avoided; meanwhile, the binder system is more stable, is suitable for various building complex environments, and is firm and not easy to break;
(3) the adhesive provided by the invention effectively improves the consistency and water retention of the adhesive, improves the adhesive strength and crack resistance, improves the workability, and ensures the product quality.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments, but is not limited thereto.
Example 1
The adhesive for the fabricated building is prepared from the following raw materials in parts by weight: 32 parts of cementing material, 45 parts of aggregate, 4 parts of phosphorylated hydroxypropyl methyl cellulose, 1 part of calcium formate, 6 parts of water, 1.5 parts of water glass and 0.8 part of polyacrylate emulsion.
The cementing material consists of portland cement, fly ash and slag in a mass ratio of: cement: fly ash: slag 80:15: 5.
The cement is 42.5 common Portland cement, the 28d mortar compressive strength of the cement is more than or equal to 50MPa, the water consumption of the standard consistency of the cement is less than or equal to 27 percent, and the specific surface area is more than or equal to 400m2/kg。
Specific surface area of the fly ash is 850m2/kg～1380m2Perkg, belonging to national standard I-grade fly ash.
The slag isFine slag powder of grade S95 or above and having a specific surface area of 420m2/kg～480m2/kg。
The aggregate is river sand particles with the particle size of less than or equal to 2.26mm, the morphology of the river sand particles meets the requirement that the equivalent ellipse perimeter ratio AIEEP is less than or equal to 1.15, and the water content is less than or equal to 0.5 percent after drying treatment.
The preparation method of the phosphorylated hydroxypropyl methyl cellulose comprises the following steps: adding water into sodium dihydrogen phosphate to dissolve, stirring at high speed to dissolve to obtain a solution with a mass concentration of 20%, adjusting pH to 4-5 with 1mol/L NaOH, adding starch and hydroxypropyl methylcellulose according to a mass ratio of 2:1, and stirring for 2 h; and adding neopentyl glycol diglycidyl ether accounting for 2% of the mass of the mixed solution, magnetically stirring for 2 hours at the constant temperature of 45 ℃, washing, centrifuging and drying to obtain a cross-linked product, namely the phosphorylated hydroxypropyl methyl cellulose.
The viscosity of the hydroxypropyl methyl cellulose is not less than 100000mPa & s.
The modulus of the water glass is 2.6.
The solid content of the polyacrylate emulsion is more than or equal to 45 percent.
A preparation method of the adhesive for the fabricated building comprises the following steps:
(1) screening and drying river sand;
(2) adding water into sodium dihydrogen phosphate to dissolve, stirring at high speed to dissolve to obtain a solution with a mass concentration of 20%, adjusting pH to 4-5 with 1mol/L NaOH, adding starch and hydroxypropyl methylcellulose according to a mass ratio of 2:1, and stirring for 1 h; adding neopentyl glycol diglycidyl ether accounting for 2% of the mass of the mixed solution, magnetically stirring for 1h at the constant temperature of 45 ℃, washing, centrifuging and drying to obtain a cross-linked product, namely the phosphorylated hydroxypropyl methyl cellulose;
(3) preparing a dry material: adding the gel material, the aggregate and the phosphorylated hydroxypropyl methyl cellulose into a stirrer according to parts by weight, stirring and uniformly mixing to form a dry component A of the binder;
(4) preparing a water material: and (3) putting water, water glass and polyacrylate emulsion in parts by weight into a stirring container, stirring to form an aqueous component B of the binder, and separately sealing and storing the dry component A and the aqueous component B.
When in use, the dry component A and the water-based component B are uniformly mixed in equal mass.
Example 2
The adhesive for the fabricated building is prepared from the following raw materials in parts by weight: 34 parts of a cementing material, 50 parts of aggregate, 6 parts of phosphorylated hydroxypropyl methyl cellulose, 1.2 parts of calcium formate, 7 parts of water, 1.8 parts of water glass and 1 part of polyacrylate emulsion.
The cementing material consists of portland cement, fly ash and slag in a mass ratio of: cement: fly ash: slag 80:15: 5.
The cement is 42.5 common Portland cement, the 28d mortar compressive strength of the cement is more than or equal to 50MPa, the water consumption of the standard consistency of the cement is less than or equal to 27 percent, and the specific surface area is more than or equal to 400m2/kg。
The specific surface area of the fly ash is 850m2/kg～1380m2Perkg, belonging to national standard I-grade fly ash.
The slag is slag micropowder with grade of S95 or above and specific surface area of 420m2/kg～480m2/kg。
The aggregate is river sand particles with the particle size of less than or equal to 2.26mm, the morphology of the river sand particles meets the requirement that the equivalent ellipse perimeter ratio AIEEP is less than or equal to 1.15, and the water content is less than or equal to 0.5 percent after drying treatment.
The preparation method of the phosphorylated hydroxypropyl methyl cellulose comprises the following steps: adding water into sodium dihydrogen phosphate to dissolve, stirring at high speed to dissolve to obtain a solution with a mass concentration of 20%, adjusting pH to 4-5 with 1mol/L NaOH, adding starch and hydroxypropyl methylcellulose according to a mass ratio of 2:1, and stirring for 2 h; and adding neopentyl glycol diglycidyl ether accounting for 2% of the mass of the mixed solution, magnetically stirring for 2 hours at the constant temperature of 55 ℃, washing, centrifuging and drying to obtain a cross-linked product, namely the phosphorylated hydroxypropyl methyl cellulose.
The viscosity of the hydroxypropyl methyl cellulose is not less than 100000mPa & s.
The modulus of the water glass is 2.6.
The solid content of the polyacrylate emulsion is more than or equal to 45 percent.
A preparation method of the adhesive for the fabricated building comprises the following steps:
(1) screening and drying river sand;
(2) adding water into sodium dihydrogen phosphate to dissolve, stirring at high speed to dissolve to obtain a solution with a mass concentration of 20%, adjusting pH to 4-5 with 1mol/L NaOH, adding starch and hydroxypropyl methylcellulose according to a mass ratio of 2:1, and stirring for 2 h; adding neopentyl glycol diglycidyl ether accounting for 2% of the mass of the mixed solution, magnetically stirring for 2 hours at the constant temperature of 55 ℃, washing, centrifuging and drying to obtain a cross-linked product, namely the phosphorylated hydroxypropyl methyl cellulose;
(3) preparing a dry material: adding the gel material, the aggregate and the phosphorylated hydroxypropyl methyl cellulose into a stirrer according to parts by weight, stirring and uniformly mixing to form a dry component A of the binder;
(4) preparing a water material: and (3) putting water, water glass and polyacrylate emulsion in parts by weight into a stirring container, stirring to form an aqueous component B of the binder, and separately sealing and storing the dry component A and the aqueous component B.
When in use, the dry component A and the water-based component B are uniformly mixed in equal mass.
Example 3
The adhesive for the fabricated building is prepared from the following raw materials in parts by weight: 38 parts of cementing material, 52 parts of aggregate, 8 parts of phosphorylated hydroxypropyl methyl cellulose, 1.5 parts of calcium formate, 9 parts of water, 2 parts of water glass and 1.2 parts of polyacrylate emulsion.
The cementing material consists of portland cement, fly ash and slag in a mass ratio of: cement: fly ash: slag 80:15: 5.
The cement is 42.5 common Portland cement, the 28d mortar compressive strength of the cement is more than or equal to 50MPa, the water consumption of the standard consistency of the cement is less than or equal to 27 percent, and the specific surface area is more than or equal to 400m2/kg。
The specific surface area of the fly ash is 850m2/kg～1380m2Perkg, belonging to national standard I-grade fly ash.
The slag is slag micropowder with grade of S95 or above and specific surface area of 420m2/kg～480m2/kg。
The aggregate is river sand particles with the particle size of less than or equal to 2.26mm, the morphology of the river sand particles meets the requirement that the equivalent ellipse perimeter ratio AIEEP is less than or equal to 1.15, and the water content is less than or equal to 0.5 percent after drying treatment.
The preparation method of the phosphorylated hydroxypropyl methyl cellulose comprises the following steps: adding water into sodium dihydrogen phosphate to dissolve, stirring at high speed to dissolve to obtain a solution with a mass concentration of 20%, adjusting pH to 4-5 with 1mol/L NaOH, adding starch and hydroxypropyl methylcellulose according to a mass ratio of 2:1, and stirring for 2 h; and adding neopentyl glycol diglycidyl ether accounting for 2% of the mass of the mixed solution, magnetically stirring for 2 hours at the constant temperature of 55 ℃, washing, centrifuging and drying to obtain a cross-linked product, namely the phosphorylated hydroxypropyl methyl cellulose.
The viscosity of the hydroxypropyl methyl cellulose is not less than 100000mPa & s.
The modulus of the water glass is 2.6.
The solid content of the polyacrylate emulsion is more than or equal to 45 percent.
A preparation method of the adhesive for the fabricated building comprises the following steps:
(1) screening and drying river sand;
(2) adding water into sodium dihydrogen phosphate to dissolve, stirring at high speed to dissolve to obtain a solution with a mass concentration of 20%, adjusting pH to 4-5 with 1mol/L NaOH, adding starch and hydroxypropyl methylcellulose according to a mass ratio of 2:1, and stirring for 2 h; adding neopentyl glycol diglycidyl ether accounting for 2% of the mass of the mixed solution, magnetically stirring for 2 hours at the constant temperature of 55 ℃, washing, centrifuging and drying to obtain a cross-linked product, namely the phosphorylated hydroxypropyl methyl cellulose;
(3) preparing a dry material: adding the gel material, the aggregate and the phosphorylated hydroxypropyl methyl cellulose into a stirrer according to parts by weight, stirring and uniformly mixing to form a dry component A of the binder;
(4) preparing a water material: and (3) putting water, water glass and polyacrylate emulsion in parts by weight into a stirring container, stirring to form an aqueous component B of the binder, and separately sealing and storing the dry component A and the aqueous component B.
When in use, the dry component A and the water-based component B are uniformly mixed in equal mass.
Comparative example 1
The adhesive for the fabricated building is prepared from the following raw materials in parts by weight: 38 parts of cementing material, 52 parts of aggregate, 8 parts of hydroxypropyl methyl cellulose, 9 parts of water, 2 parts of water glass and 1.2 parts of polyacrylate emulsion.
The cementing material consists of portland cement, fly ash and slag in a mass ratio of: cement: fly ash: slag 80:15: 5.
The cement is 42.5 common Portland cement, the 28d mortar compressive strength of the cement is more than or equal to 50MPa, the water consumption of the standard consistency of the cement is less than or equal to 27 percent, and the specific surface area is more than or equal to 400m2/kg。
The specific surface area of the fly ash is 850m2/kg～1380m2Perkg, belonging to national standard I-grade fly ash.
The slag is slag micropowder with grade of S95 or above and specific surface area of 420m2/kg～480m2/kg。
The aggregate is river sand particles with the particle size of less than or equal to 2.26mm, the morphology of the river sand particles meets the requirement that the equivalent ellipse perimeter ratio AIEEP is less than or equal to 1.15, and the water content is less than or equal to 0.5 percent after drying treatment.
The viscosity of the hydroxypropyl methyl cellulose is not less than 100000mPa & s.
The modulus of the water glass is 2.6.
The solid content of the polyacrylate emulsion is more than or equal to 45 percent.
A preparation method of the adhesive for the fabricated building comprises the following steps:
(1) screening and drying river sand;
(2) preparing a dry material: adding the gel material, the aggregate and the hydroxypropyl methyl cellulose into a stirrer according to the parts by weight, stirring and uniformly mixing to form a dry component A of the binder;
(3) preparing a water material: and (3) putting water, water glass and polyacrylate emulsion in parts by weight into a stirring container, stirring to form an aqueous component B of the binder, and separately sealing and storing the dry component A and the aqueous component B.
When in use, the dry component A and the water-based component B are uniformly mixed in equal mass.
This comparative example is the same as example 3 except that hydroxypropyl methylcellulose was used directly, i.e., without the phosphorylation modification.
Performance testing
The adhesives provided in examples 1-3 and comparative example 1 are subjected to crack resistance detection experiments by a ring constraint test piece method, mechanical properties such as compression resistance, bending resistance and the like are tested by a GB/T50081-2019 method, water retention is tested by referring to the JGJ/T70-2009 building mortar basic performance test method standard, and the bonding strength of the bonding adhesive prepared by the invention is tested by referring to JC/T547-2017 and JC/T984-2005 polymer cement waterproof mortar standard.
The specific test results are shown in Table 1.
Table 1 results of performance testing
As can be seen from the data in Table 1, the test piece obtained in the embodiment of the invention has high compressive and flexural strength, good crack resistance, permeability resistance and compressive capacity, firm bonding force and difficult falling, and all the performances of the comparative example 1 with less phosphorylation modification are reduced in different degrees. The modified hydroxypropyl methyl cellulose can efficiently play the roles of thickening and adhesion promotion, improve the adhesive strength and the crack resistance, improve the construction performance and ensure the product quality.
It should be noted that the above-mentioned embodiments are only some of the preferred modes for implementing the invention, and not all of them. Obviously, all other embodiments obtained by persons of ordinary skill in the art based on the above-mentioned embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
Claims (8)
1. The adhesive for the fabricated building is characterized by being prepared from the following raw materials in parts by weight: 32-38 parts of a cementing material, 45-52 parts of an aggregate, 4-8 parts of phosphorylated hydroxypropyl methyl cellulose, 1-1.5 parts of calcium formate, 6-9 parts of water, 1.5-2 parts of water glass and 0.8-1.2 parts of polyacrylate emulsion.
2. The assembly type building adhesive according to claim 1, wherein the cementing material is composed of portland cement, fly ash and slag in a mass ratio of: cement: fly ash: slag 80:15: 5.
3. The assembly type building adhesive according to claim 1, wherein the aggregate is river sand particles with a particle size of 2.26mm or less, the morphology of the river sand particles satisfies the equivalent ellipse perimeter ratio AIEEP of 1.15 or less, and the moisture content is 0.5% or less after drying treatment.
4. The assembly type construction adhesive according to claim 1, wherein the phosphorylated hydroxypropylmethylcellulose is prepared by: adding water into sodium dihydrogen phosphate to dissolve, stirring at high speed to dissolve to obtain a solution with a mass concentration of 20%, adjusting pH to 4-5 with 1mol/L NaOH, adding starch and hydroxypropyl methylcellulose according to a mass ratio of 2:1, and stirring for 1-2 h; and adding neopentyl glycol diglycidyl ether accounting for 2 percent of the mass of the mixed solution, magnetically stirring for 1-2 hours at the constant temperature of 45-55 ℃, washing with water, centrifuging, and drying to obtain a cross-linked product, namely the phosphorylated hydroxypropyl methyl cellulose.
5. The assembly type construction adhesive according to claim 4, wherein the hydroxypropylmethylcellulose has a viscosity of not less than 100000 mPa-s.
6. The assembly type construction adhesive according to claim 1, wherein the water glass has a modulus of 2.0 to 3.0.
7. The assembly building adhesive of claim 1, wherein the polyacrylate emulsion has a solids content of 45% or more.
8. A method for preparing the assembly type construction adhesive according to any one of claims 1 to 7, comprising the steps of:
(1) screening and drying river sand;
(2) adding water into sodium dihydrogen phosphate to dissolve, stirring at high speed to dissolve to obtain a solution with a mass concentration of 20%, adjusting pH to 4-5 with 1mol/L NaOH, adding starch and hydroxypropyl methylcellulose according to a mass ratio of 2:1, and stirring for 1-2 h; adding neopentyl glycol diglycidyl ether accounting for 2% of the mass of the mixed solution, magnetically stirring for 1-2 hours at a constant temperature of 45-55 ℃, washing with water, centrifuging, and drying to obtain a cross-linked product, namely the phosphorylated hydroxypropyl methyl cellulose;
(3) preparing a dry material: adding the gel material, the aggregate and the phosphorylated hydroxypropyl methyl cellulose into a stirrer according to parts by weight, stirring and uniformly mixing to form a dry component A of the binder;
(4) preparing a water material: and (3) putting water, water glass and polyacrylate emulsion in parts by weight into a stirring container, stirring to form an aqueous component B of the binder, and separately sealing and storing the dry component A and the aqueous component B.
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| CN202111312348.0A CN113943139B (en) | 2021-11-08 | 2021-11-08 | Adhesive for assembly type building and preparation method thereof |
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| CN202111312348.0A CN113943139B (en) | 2021-11-08 | 2021-11-08 | Adhesive for assembly type building and preparation method thereof |
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| CN113943139A true CN113943139A (en) | 2022-01-18 |
| CN113943139B CN113943139B (en) | 2022-06-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956748A (en) * | 2022-04-11 | 2022-08-30 | 东南大学 | Polyacrylic acid emulsion modified alkali-activated slag material for repairing and preparation method thereof |
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| CN1948210A (en) * | 2005-10-14 | 2007-04-18 | 株式会社日本触媒 | Cement mixing agent |
| CN102850031A (en) * | 2012-09-20 | 2013-01-02 | 吴江市天源塑胶有限公司 | Corrosion-resistant polymer waterproof mortar |
| WO2016032090A1 (en) * | 2014-08-29 | 2016-03-03 | 삼성정밀화학(주) | Cement mortar additive for extrusion molding, cement mortar for extrusion molding, and extrusion-molded product |
| CN106587866A (en) * | 2016-12-15 | 2017-04-26 | 天津易赢尔节能技术有限公司 | Green and environment-friendly masonry mortar |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000044321A (en) * | 1998-07-27 | 2000-02-15 | Matsushita Electric Works Ltd | Inorganic hardened body and its production |
| CN1948210A (en) * | 2005-10-14 | 2007-04-18 | 株式会社日本触媒 | Cement mixing agent |
| CN102850031A (en) * | 2012-09-20 | 2013-01-02 | 吴江市天源塑胶有限公司 | Corrosion-resistant polymer waterproof mortar |
| WO2016032090A1 (en) * | 2014-08-29 | 2016-03-03 | 삼성정밀화학(주) | Cement mortar additive for extrusion molding, cement mortar for extrusion molding, and extrusion-molded product |
| CN106587866A (en) * | 2016-12-15 | 2017-04-26 | 天津易赢尔节能技术有限公司 | Green and environment-friendly masonry mortar |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956748A (en) * | 2022-04-11 | 2022-08-30 | 东南大学 | Polyacrylic acid emulsion modified alkali-activated slag material for repairing and preparation method thereof |
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| CN113943139B (en) | 2022-06-28 |
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