CN110372317B - Adhesive for magnesium wall and preparation method thereof - Google Patents
Adhesive for magnesium wall and preparation method thereof Download PDFInfo
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- CN110372317B CN110372317B CN201910600579.8A CN201910600579A CN110372317B CN 110372317 B CN110372317 B CN 110372317B CN 201910600579 A CN201910600579 A CN 201910600579A CN 110372317 B CN110372317 B CN 110372317B
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- magnesium
- parts
- adhesive
- magnesium sulfate
- sulfate heptahydrate
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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
- C04B28/30—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 magnesium cements or similar 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
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention provides an adhesive for a magnesium wall and a preparation method thereof, wherein the adhesive comprises the following components in parts by weight: 100-200 parts of magnesium oxide, 80-170 parts of magnesium sulfate solution, 1-5 parts of phosphoric acid, 1-5 parts of sodium phosphate, 10-20 parts of 108 glue, 10-20 parts of glue powder, 2-8 parts of concrete interface agent, 3-7 parts of straw or sawdust, 7-16 parts of fly ash, 1-2 parts of glass fiber and 10-25 parts of water; the magnesium sulfate solution is prepared from magnesium sulfate heptahydrate, and the molar ratio of the magnesium oxide to the magnesium sulfate heptahydrate is 6: 1. the adhesive for the magnesium wall has the advantages of high bonding strength, good weather resistance and water resistance, is suitable for magnesium wall materials, and has stable connection performance and good practicability.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to an adhesive for a magnesium wall. Meanwhile, the invention also relates to a preparation method of the adhesive.
Background
The building adhesive is an adhesive and is also an indispensable material for building engineering, and is mainly used for sealing various seams or holes of buildings so as to prevent gas, liquid and solid from permeating through and prevent structural materials from being damaged when the structure is displaced, thereby playing the functions of heat preservation, sound insulation, water resistance, dust resistance, gas resistance, fire resistance, corrosion resistance, shock absorption and preventing the seams from accumulating foreign matters.
The conventional building adhesive is high in production cost and poor in environmental adaptability, and can not meet the requirements of the modern society on the building adhesive gradually. The lightweight wall prepared from the magnesium cementing material has been developed rapidly in the building industry in recent years, and has a large proportion in a formula building, so that the application of the adhesive suitable for the magnesium wall material is more and more important. However, no special adhesive for bonding a magnesium wall made of a magnesium gel material is available in the market, so that the development of an adhesive which is suitable for a magnesium wall material, green, environment-friendly, excellent in performance and good in weather resistance is very important.
Disclosure of Invention
In view of the above, the present invention is directed to provide an adhesive for magnesium wall, which can be applied to the use requirement of magnesium wall material.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the adhesive for the magnesium wall comprises the following components in parts by weight: 100-200 parts of magnesium oxide, 80-170 parts of magnesium sulfate solution, 1-5 parts of phosphoric acid, 1-5 parts of sodium phosphate, 10-20 parts of 108 glue, 10-20 parts of glue powder, 2-8 parts of concrete interface agent, 3-7 parts of straw or sawdust, 7-16 parts of fly ash, 1-2 parts of glass fiber and 10-25 parts of water; the magnesium sulfate solution is prepared from magnesium sulfate heptahydrate, and the molar ratio of the magnesium oxide to the magnesium sulfate heptahydrate is 6: 1.
furthermore, the magnesium oxide is industrial grade light magnesium oxide, and the content of the magnesium oxide is 75-85%.
Furthermore, the mesh number of the magnesium oxide is 200 meshes, and the activity is 45-65%.
Further, the magnesium sulfate heptahydrate adopts industrial grade magnesium sulfate heptahydrate with the content of 99.9 percent of magnesium sulfate heptahydrate, and the baume degree of the magnesium sulfate heptahydrate solution is 27-30.
Further, the concentration of the phosphoric acid is 99%.
Furthermore, the rubber powder is redispersible emulsion powder for buildings.
Furthermore, the water content of the straw or the sawdust is less than or equal to 20 percent.
Furthermore, the glass fiber is alkali-free glass fiber, wherein the content of metal oxide is less than 0.8%, and the diameter of the monofilament is 10-20 um.
Furthermore, the fly ash is industrial first-grade fly ash, the fineness of the fly ash is 320 meshes, the screen residue is less than or equal to 12 percent, and the ignition loss is less than or equal to 5 percent.
Compared with the prior art, the invention has the following advantages:
by adopting the raw material components, the prepared adhesive has the characteristics of tight adhesion, difficult falling and cracking, good weather resistance, small environmental pollution and the like, so that the defects that the conventional common building adhesive is high in production cost, poor in environmental adaptability and incapable of meeting the requirement of the adhesive for the magnesium wall material can be overcome.
The main raw materials of the adhesive for the magnesium wall are magnesium oxide and magnesium sulfate heptahydrate, the two raw materials and the main components of the magnesium wall material are materials with the same properties, and the bonding effect is better because the bonding between the molecules of the materials with the same properties has larger bonding energy and is more stable after bonding. Meanwhile, the raw materials of the invention are added with modifying agents of phosphoric acid and sodium phosphate, so that the modified adhesive has good mechanical property and water resistance. By adding 108 glue, glue powder and a concrete interface agent, the three additives are mixed to form a film, so that the protective colloid can be absorbed by a magnesium material system, the cohesive force of the adhesive can be further increased, the reinforcing effect is exerted on the basis of the former raw materials, and the adhesive force and the good mechanical property of the adhesive can be further increased.
All raw materials of the adhesive disclosed by the invention are environment-friendly materials, and meet relevant national standards, and the raw materials are compounded and used to play a synergistic effect, so that the adhesion, the breaking strength, the water resistance and the plasticity of the adhesive can be obviously enhanced, the adhesive can adapt to the adhesive requirement of a magnesium wall material, and the application effect is good.
The invention also provides a preparation method of the adhesive for the magnesium wall, and the preparation method comprises the following steps:
step a, dissolving magnesium sulfate heptahydrate in water to prepare magnesium sulfate heptahydrate solution with the Baume degree of 29, and adding the magnesium sulfate heptahydrate solution into a reaction kettle;
step b, adding magnesium oxide into the reaction kettle, uniformly stirring, slowly adding phosphoric acid, sodium phosphate, 108 glue, rubber powder and a concrete interface agent into the reaction kettle respectively, and stirring at 600-800rpm for 20-30min to fully dissolve and mix the components in the reaction kettle;
and c, slowly adding the straws or sawdust, the fly ash, the glass fiber and the water into the reaction kettle respectively, continuously stirring for 30-60min, and stopping stirring to obtain the adhesive for the magnesium wall.
The adhesive prepared by the preparation method disclosed by the invention has the advantages of high bonding strength, good weather resistance and water resistance, is suitable for magnesium wall materials, and has stable connection performance and good practicability.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The embodiment relates to an adhesive for a magnesium wall, which is generally applied to the field of buildings and can be specially used for a light magnesium wall prepared from a magnesium cementing material. However, except for the magnesium wall, the application of the adhesive to other walls is not limited, and the adhesive of the embodiment can be used as long as the construction requirements of the relevant walls can be met.
The adhesive for the magnesium wall in the embodiment is composed of the following raw materials in parts by weight: 100-200 parts of magnesium oxide, 80-170 parts of magnesium sulfate solution, 1-5 parts of phosphoric acid, 1-5 parts of sodium phosphate, 10-20 parts of 108 glue, 10-20 parts of glue powder, 2-8 parts of concrete interface agent, 3-7 parts of straw or sawdust, 7-16 parts of fly ash, 1-2 parts of glass fiber and 10-25 parts of water. And wherein, the magnesium sulfate solution in the above components is prepared from magnesium sulfate heptahydrate, and the molar ratio of magnesium oxide to magnesium sulfate heptahydrate is 6: 1.
in the composition, the magnesium oxide is industrial grade light magnesium oxide (MgO), the content of the magnesium oxide is more than or equal to 85 percent, the mesh number of the magnesium oxide is 200 meshes, and the activity is 45 to 65 percent. The baume degree of the magnesium sulfate heptahydrate solution is 27-30, and the magnesium sulfate heptahydrate adopts industrial grade magnesium sulfate heptahydrate (MgSO)4·7H2O), white crystalline granular appearance, HG/T2680-95 standard number, and 99.9% magnesium sulfate heptahydrate content. The concentration of phosphoric acid used was 99%.
The rubber powder is a powdery rubber material obtained by crushing waste rubber products, the rubber powder in the embodiment specifically adopts re-dispersible latex powder for buildings, and the re-dispersible latex powder is divided into an ethylene/vinyl acetate copolymer, an ethylene acetate/tertiary carbonate ethylene copolymer and the like, the appearance of the rubber powder is white or faint yellow powder, has no unpleasant odor, no visible impurities and extremely outstanding bonding strength, and can improve the flexibility, the alkali resistance, the adhesion, the breaking strength, the waterproofness, the plasticity and the wear resistance of the material after being added, and has stronger flexibility.
The concrete interface agent is an adhesive, in particular to polymer modified cement mortar which is generally made of vinyl acetate-ethylene and has super strong adhesive force, excellent water resistance and aging resistance. 108 glue is a novel high-molecular synthetic building adhesive, is a slightly white transparent glue in appearance, has good construction compatibility and high bonding strength, and is economical and practical. The fly ash is fine ash collected from flue gas generated after coal combustion and is main solid waste discharged from a coal-fired power plant, the fly ash of the embodiment adopts industrial first-grade fly ash, is black and gray, is dried in ash content, has no caking phenomenon, and has the fineness of 320 meshes, the screen residue is less than or equal to 12 percent, and the loss on ignition is less than or equal to 5 percent.
In addition, the water content of the straw or the sawdust adopted in the embodiment is less than or equal to 20 percent. The glass fiber is alkali-free glass fiber, wherein the content of metal oxide is less than 0.8%, and the diameter of the monofilament is 10-20 um.
When the adhesive for the magnesium wall is prepared, a conventional mechanical stirring reaction kettle can be adopted, magnesium sulfate heptahydrate is firstly dissolved in water to prepare a magnesium sulfate solution with the baume degree of 27-30, and then the solution is added into the reaction kettle. Then adding magnesium oxide into the reaction kettle, uniformly stirring, slowly adding phosphoric acid, sodium phosphate, 108 glue, rubber powder and a concrete interface agent into the reaction kettle at one time, and stirring at 600-800rpm for 20-30min to fully dissolve and mix the components in the reaction kettle. Then, slowly adding the straws or sawdust, the fly ash, the glass fiber and the water into the reaction kettle respectively at one time, continuously stirring for 30-60min, and stopping stirring to obtain the adhesive for the magnesium wall.
The adhesive for magnesium wall of this embodiment will be further described with reference to specific preparation examples and related tests.
In the following preparation examples, magnesium oxide, magnesium sulfate heptahydrate, phosphoric acid, sodium phosphate, 108 glue, rubber powder, a concrete interface agent, fly ash and glass fiber were all commercially available.
The straw or sawdust is obtained from farmers and furniture factories, and is cleaned and crushed, and the water is common municipal tap water.
First, preparation example 1
The adhesive for the magnesium wall in the preparation example adopts the following raw material components in parts by weight: magnesium oxide: 100 parts, magnesium sulfate solution: 83 parts, phosphoric acid: 2 parts, sodium phosphate: 2 parts, 108 glue: 10 parts of rubber powder: 10 parts of concrete interface agent: 5 parts, sawdust: 3 parts of fly ash: 8 parts, glass fiber: 1 part, water: 10 parts.
During preparation, magnesium sulfate heptahydrate is dissolved in water to prepare a magnesium sulfate solution with the Baume degree of 29, and the magnesium sulfate solution is added into a reaction kettle. Then adding magnesium oxide into the reaction kettle, uniformly stirring, adding phosphoric acid, sodium phosphate, 108 glue, rubber powder and a concrete interface agent into the reaction kettle at one time, and stirring at 650rpm for 25min to fully dissolve and mix the components in the reaction kettle. And then, adding the straws or sawdust, the fly ash, the glass fiber and the water into the reaction kettle at one time, continuously stirring for 45min, and stopping stirring to obtain the adhesive for the magnesium wall.
Preparation example 2
The adhesive for the magnesium wall in the preparation example adopts the following raw material components in parts by weight: magnesium oxide: 200 parts, magnesium sulfate solution: 170 parts, phosphoric acid: 3 parts, sodium phosphate: 3 parts, 108 glue: 20 parts of rubber powder: 20 parts of concrete interface agent: 8 parts, sawdust: 8 parts of fly ash: 16 parts of glass fiber: 2 parts, water: and 25 parts.
During preparation, magnesium sulfate heptahydrate is dissolved in water to prepare a magnesium sulfate solution with the Baume degree of 30, and the solution is added into a reaction kettle. Then adding magnesium oxide into the reaction kettle, uniformly stirring, adding phosphoric acid, sodium phosphate, 108 glue, rubber powder and a concrete interface agent into the reaction kettle at one time, and stirring at 700rpm for 25min to fully dissolve and mix the components in the reaction kettle. And then, adding the straws or sawdust, the fly ash, the glass fiber and the water into the reaction kettle at one time, continuously stirring for 50min, and stopping stirring to obtain the adhesive for the magnesium wall.
Preparation example 3
The adhesive for the magnesium wall in the preparation example adopts the following raw material components in parts by weight: magnesium oxide: 200 parts, magnesium sulfate solution: 170 parts, phosphoric acid: 3 parts, sodium phosphate: 3 parts, 108 glue: 15 parts of rubber powder: 15 parts of concrete interface agent: 8 parts, straw: 8 parts of fly ash: 16 parts of glass fiber: 2 parts, water: and 20 parts.
During preparation, magnesium sulfate heptahydrate is dissolved in water to prepare a magnesium sulfate solution with the Baume degree of 30, and the magnesium sulfate solution is added into a reaction kettle. Then adding magnesium oxide into the reaction kettle, uniformly stirring, adding phosphoric acid, sodium phosphate, 108 glue, rubber powder and a concrete interface agent into the reaction kettle at one time, and stirring at 750rpm for 25min to fully dissolve and mix the components in the reaction kettle. And then, adding the straws or sawdust, the fly ash, the glass fiber and the water into the reaction kettle at one time, continuously stirring for 50min, and stopping stirring to obtain the adhesive for the magnesium wall.
Fourthly, testing the freeze-thaw resistance cycle performance
The method comprises the steps of adopting 9 magnesium walls as samples, respectively marking the magnesium walls as No. 1-9, enabling every 3 magnesium walls to be a group, respectively sticking the walls to concrete blocks by using the adhesives prepared by the 3 preparation examples, adopting 1 magnesium wall and a commercially available common building adhesive as a comparison group, and sticking the walls of the comparison group to the concrete blocks by using the adhesive. The test pieces were maintained for 14 days before testing. And then testing, wherein in the testing, the sample is firstly placed in a constant-temperature water tank with the water temperature of (23 +/-2) DEG C, soaked for 18 hours, then taken out and placed in a low-temperature box, frozen for 3 hours from the temperature in the low-temperature box to-18 ℃, then taken out from the low-temperature box, immediately placed in an oven with the temperature of (50 +/-2) DEG C and kept at the constant temperature for 3 hours. The samples were taken out, and after 10 cycles of the above test procedure, the samples were left for 2 hours under curing conditions, and the shear strength of each sample was tested, with the test structure shown in table 1 below.
Table 1:
test result of freeze-thaw cycle resistance
As can be seen from the above table, the shear strength of the sample using the adhesive of the present embodiment is greater than or equal to 3.39MPa, which is greatly increased compared to using common commercially available building adhesives. Therefore, the magnesium wall adhesive prepared by the embodiment can be suitable for magnesium walls, is tightly adhered, is not easy to fall off and crack, and has good practicability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The adhesive for the magnesium wall is characterized by comprising the following components in parts by weight: the adhesive is used for sticking a light magnesium wall body prepared from a magnesium cementing material on a concrete block and comprises the following components in parts by weight: 100-200 parts of magnesium oxide, 80-170 parts of magnesium sulfate solution, 1-5 parts of phosphoric acid, 1-5 parts of sodium phosphate, 10-20 parts of 108 glue, 10-20 parts of glue powder, 2-8 parts of concrete interface agent, 3-7 parts of straw or sawdust, 7-16 parts of fly ash, 1-2 parts of glass fiber and 10-25 parts of water; the magnesium sulfate solution is prepared from magnesium sulfate heptahydrate, and the molar ratio of the magnesium oxide to the magnesium sulfate heptahydrate is 6: 1;
the preparation method of the adhesive for the magnesium wall comprises the following steps:
step a, dissolving magnesium sulfate heptahydrate in water to prepare magnesium sulfate heptahydrate solution with the Baume degree of 27-30, and adding the magnesium sulfate heptahydrate solution into a reaction kettle;
step b, adding magnesium oxide into the reaction kettle, uniformly stirring, then sequentially and slowly adding phosphoric acid, sodium phosphate, 108 glue, rubber powder and a concrete interface agent into the reaction kettle, and stirring at 600-800rpm for 20-30min to fully dissolve and mix the components in the reaction kettle;
and c, slowly adding the straws or sawdust, the fly ash, the glass fiber and the water into the reaction kettle respectively, continuously stirring for 30-60min, and stopping stirring to obtain the adhesive for the magnesium wall.
2. The adhesive for the magnesium wall body as claimed in claim 1, wherein: the magnesium oxide is industrial grade light magnesium oxide, and the content of the magnesium oxide is 75-85%.
3. The magnesium wall adhesive according to claim 2, wherein: the mesh number of the magnesium oxide is 200 meshes, and the activity is 45-65%.
4. The adhesive for the magnesium wall body as claimed in claim 1, wherein: the magnesium sulfate heptahydrate adopts industrial grade magnesium sulfate heptahydrate with the content of 99.9 percent of magnesium sulfate heptahydrate, and the baume degree of a magnesium sulfate heptahydrate solution is 27-30.
5. The adhesive for the magnesium wall body as claimed in claim 1, wherein: the concentration of the phosphoric acid is 99%.
6. The adhesive for the magnesium wall body as claimed in claim 1, wherein: the rubber powder is redispersible emulsion powder for buildings.
7. The adhesive for the magnesium wall body as claimed in claim 1, wherein: the water content of the straw or the sawdust is less than or equal to 20 percent.
8. The adhesive for the magnesium wall body as claimed in claim 1, wherein: the glass fiber is alkali-free glass fiber, wherein the content of metal oxide is less than 0.8%, and the diameter of the monofilament is 10-20 um.
9. The adhesive for the magnesium wall body as claimed in claim 1, wherein: the fly ash is industrial first-grade fly ash, the fineness of the fly ash is 320 meshes, the screen residue is less than or equal to 12 percent, and the ignition loss is less than or equal to 5 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910600579.8A CN110372317B (en) | 2019-07-04 | 2019-07-04 | Adhesive for magnesium wall and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910600579.8A CN110372317B (en) | 2019-07-04 | 2019-07-04 | Adhesive for magnesium wall and preparation method thereof |
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| Publication Number | Publication Date |
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| CN110372317A CN110372317A (en) | 2019-10-25 |
| CN110372317B true CN110372317B (en) | 2022-01-04 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108275965A (en) * | 2018-04-28 | 2018-07-13 | 青海大学 | A kind of reinforced glue and its preparation method and application for concrete structure |
| CN109160767A (en) * | 2018-10-29 | 2019-01-08 | 河北科技大学 | Magnesium oxychloride cementing material modifying agent and preparation method and modified chloromagnesia cementitious material and preparation method and use |
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- 2019-07-04 CN CN201910600579.8A patent/CN110372317B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108275965A (en) * | 2018-04-28 | 2018-07-13 | 青海大学 | A kind of reinforced glue and its preparation method and application for concrete structure |
| CN109160767A (en) * | 2018-10-29 | 2019-01-08 | 河北科技大学 | Magnesium oxychloride cementing material modifying agent and preparation method and modified chloromagnesia cementitious material and preparation method and use |
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