CN111848086A - Gypsum mortar for interior wall masonry and use method thereof - Google Patents
Gypsum mortar for interior wall masonry and use method thereof Download PDFInfo
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- CN111848086A CN111848086A CN202010738644.6A CN202010738644A CN111848086A CN 111848086 A CN111848086 A CN 111848086A CN 202010738644 A CN202010738644 A CN 202010738644A CN 111848086 A CN111848086 A CN 111848086A
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- gypsum
- mortar
- gypsum mortar
- interior wall
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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
- C04B28/14—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 calcium sulfate 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
- C04B2111/20—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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of building materials, and particularly relates to gypsum mortar for interior wall masonry and a using method thereof. The gypsum mortar is prepared from the following raw materials: 60-90 parts of modified building gypsum, 10-40 parts of machine-made sand, 0.5-5 parts of vitrified micro bubbles, 0.5-1 part of modified fiber, 3-10 parts of ash calcium, 0.1-0.5 part of retarder, 0.1-0.5 part of water-retaining agent, 0.1-0.3 part of rubber powder, 0.1-0.5 part of dispersant and 0.1-0.3 part of lubricant. The gypsum mortar prepared by the invention has the advantages of strong bonding property, high strength, good impermeability, heat preservation property and the like; the concrete hollow blocks have strong bonding effect, the heat insulation performance of the inner partition wall made of the concrete hollow blocks is basically not influenced, and the problems of seepage, cracking and heat insulation performance reduction of the existing mortar used for the concrete hollow block wall are solved.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to gypsum mortar for interior wall masonry and a using method thereof.
Background
The phosphogypsum is solid waste generated after phosphoric acid is prepared by the reaction of phosphate rock and sulfuric acid when phosphoric acid is produced by a phosphorus chemical wet method. With the development of high-concentration phosphorus fertilizers in the world, the discharge amount of the phosphogypsum also increases day by day, the stacking of the phosphogypsum occupies a large amount of land, great damage is caused to the environment, enterprises spend a large amount of capital for treating the phosphogypsum every year, and great pressure is caused to the development of phosphorus chemical enterprises, so the treatment of the phosphogypsum is unsmooth. Therefore, the problem of treatment and utilization of the phosphogypsum becomes a worldwide difficult problem, and the effective utilization of the phosphogypsum, which is a solid waste, has profound and important significance for development of chemical industry and building material industry in China and treatment of environmental pollution. The novel wall material is manufactured by utilizing abundant calcium sulfate dihydrate resources in the phosphogypsum, so that the problems of natural gypsum resource consumption, reduction of the production cost of the wall material, reduction of the use of high-energy-consumption clay bricks, serious environmental pollution caused by the accumulation of a large amount of phosphogypsum and the like can be well solved, resources can be effectively saved, the cost can be reduced, and the carbon emission can be reduced. At present, building gypsum prepared from phosphogypsum is widely used in the technical field of buildings, such as gypsum boards, gypsum blocks, plastering mortar and the like.
The concrete hollow block is a building wall material newly developed in recent years, has the advantages of light weight, good heat insulation performance and the like, and is used for an inner partition wall; however, when the conventional masonry mortar is used for concrete hollow blocks, the bonding strength and the shear strength along the mortar joints are greatly reduced. The effective contact surface between the building block and mortar is small during building; in addition, during the production and transportation process, some chippy particles are generated on the surface of the concrete hollow block and attached to the surface. And the building gypsum has poor water resistance, low strength, softening after water absorption and poor fluidity, and the strength of the wall body can be influenced when the building gypsum is used for mortar of concrete hollow blocks.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides gypsum mortar for interior wall masonry and a using method thereof, and the gypsum mortar is realized by the following technical scheme:
the gypsum mortar for building the inner wall is characterized by being prepared from the following raw materials: 60-90 parts of modified building gypsum, 10-40 parts of machine-made sand, 0.5-5 parts of vitrified micro bubbles, 0.5-1 part of modified fiber, 3-10 parts of ash calcium, 0.1-0.5 part of retarder, 0.1-0.5 part of water-retaining agent, 0.1-0.3 part of rubber powder, 0.1-0.5 part of dispersant and 0.1-0.3 part of lubricant.
Preferably, the modified fiber is prepared by: adding polyethylene glycol and aluminum silicate into polyester resin, blending, melt spinning and chopping to obtain primary modified fiber; wetting the primary modified fiber with an enzyme solution, standing for 30-40min, and inactivating enzyme at high temperature to obtain the modified fiber.
Preferably, the addition amount of the polyethylene glycol is 10-12% of the mass of the polyester resin, and the addition amount of the aluminum silicate is 3-5% of the mass of the polyester resin.
Preferably, the enzyme solution is a phosphatase solution with a concentration of 5-6%.
Preferably, the modified building gypsum is prepared by: taking phosphogypsum powder, adding nano calcium carbonate, and stirring to obtain a mixture; adding modified solution 15 times of the mixture, homogenizing, stirring at 50-60 deg.C for 10min, and oven drying at 130 deg.C to obtain modified building gypsum.
Preferably, the amount of the nano calcium carbonate is 1-2% of the mass of the phosphogypsum powder.
Preferably, the modified solution is a mixed aqueous solution of chitosan, phosphoric acid and magnesium chloride, wherein the concentration of the chitosan is 3-4% of chitosan, 1-3% of phosphoric acid and 0.2-0.4% of magnesium chloride.
Preferably, the set retarder is methyl hydroxyethyl cellulose ether; the water-retaining agent is prepared from hydroxypropyl methyl cellulose and kaolin powder according to the weight ratio of 1: 1 in a mass ratio; the rubber powder is re-dispersible latex powder.
Preferably, the dispersant is slag powder; the lubricant is magnesium aluminum silicate.
The invention also provides a use method of the gypsum mortar for interior wall masonry, wherein the gypsum mortar is diluted by adding water according to 25-30% of the weight of the gypsum mortar, stirred and mixed uniformly, and stirred for 3-5min after standing for 8-10 min; the inner partition wall is built by bonding the concrete hollow blocks by adopting the mortar which is well stirred.
The invention has the beneficial effects that:
according to the invention, the phosphogypsum powder is modified by adopting a modification solution consisting of chitosan, phosphoric acid and magnesium chloride, so that the water absorption of the phosphogypsum powder can be effectively improved, and the water resistance of the phosphogypsum powder is improved; the nano calcium carbonate can enhance the fluidity of the gypsum colloid, so that the gypsum colloid has better workability. Polyethylene glycol, aluminum silicate and lipase solution are adopted to modify polyester fiber, so that the antistatic property, viscosity and strength of the polyester fiber can be effectively improved, the polyester fiber has better compatibility with building gypsum mortar, and has better reinforcing effect on building phosphogypsum mortar. The retarder, the water-retaining agent, the rubber powder, the dispersant and the lubricant are added into the gypsum mortar, so that the cohesiveness, the fluidity and the workability of the gypsum mortar can be further enhanced, and the concrete hollow block has good contact performance during masonry. The use of the building gypsum and the vitrified micro bubbles ensures that the gypsum mortar has the same heat insulation performance as the concrete hollow building block and does not damage the heat insulation function of the inner partition wall.
The gypsum mortar prepared by the invention has the advantages of strong bonding property, high strength, good impermeability, heat preservation property and the like; the concrete hollow blocks have strong bonding effect, the heat insulation performance of the inner partition wall made of the concrete hollow blocks is basically not influenced, and the problems of seepage, cracking and heat insulation performance reduction of the existing mortar used for the concrete hollow block wall are solved.
Detailed Description
The technical solution of the present invention is further defined below with reference to the specific embodiments, but the scope of the claims is not limited to the description.
Example 1
The gypsum mortar for building the inner wall is characterized by being prepared from the following raw materials: 60 parts of modified building gypsum, 10 parts of machine-made sand, 0.5 part of vitrified micro bubbles, 0.5 part of modified fiber, 3 parts of ash calcium, 0.1 part of methyl hydroxyethyl cellulose ether, 0.1 part of water-retaining agent, 0.1 part of redispersible latex powder, 0.1 part of slag powder and 0.1 part of magnesium aluminum silicate. Wherein the water-retaining agent is prepared from hydroxypropyl methyl cellulose and kaolin powder according to the weight ratio of 1: 1, in terms of mass ratio.
The modified fiber is prepared by the following steps: taking polyester resin, adding polyethylene glycol accounting for 10% of the mass of the polyester resin and aluminum silicate accounting for 3% of the mass of the polyester resin, blending, melting, spinning and chopping to obtain primary modified fiber; wetting the primary modified fiber with 5% phosphatase solution, standing for 30min, and inactivating enzyme at high temperature to obtain modified fiber.
The modified building gypsum is prepared by the following steps: taking phosphogypsum powder, adding nano calcium carbonate with the mass of 1% of the phosphogypsum powder, and stirring to form a mixture; adding a modified solution with the mass 15 times that of the mixture for homogenizing, stirring at 50-60 ℃ for 10min, and drying at 130 ℃ to obtain the modified building gypsum.
The modified solution is a mixed aqueous solution of chitosan, phosphoric acid and magnesium chloride, wherein the concentration of the chitosan is 3% of chitosan, 1% of phosphoric acid and 0.2% of magnesium chloride.
Example 2
The gypsum mortar for building the inner wall is characterized by being prepared from the following raw materials: 80 parts of modified building gypsum, 20 parts of machine-made sand, 3 parts of vitrified micro bubbles, 0.8 part of modified 21-0.3 part of redispersible latex powder, 0.4 part of slag powder and 0.2 part of magnesium aluminum silicate. Wherein the water-retaining agent is prepared from hydroxypropyl methyl cellulose and kaolin powder according to the weight ratio of 1: 1, in terms of mass ratio.
The modified fiber is prepared by the following steps: taking polyester resin, adding polyethylene glycol accounting for 12% of the mass of the polyester resin and aluminum silicate accounting for 4% of the mass of the polyester resin, blending, melting, spinning and chopping to obtain primary modified fiber; wetting the primary modified fiber with 6% phosphatase solution, standing for 30-40min, and inactivating enzyme at high temperature to obtain modified fiber.
The modified building gypsum is prepared by the following steps: taking phosphogypsum powder, adding nano calcium carbonate with the mass of 1.2 percent of the phosphogypsum powder, and stirring to form a mixture; adding modified solution 15 times of the mixture, homogenizing, stirring at 50-60 deg.C for 10min, and oven drying at 130 deg.C to obtain modified building gypsum.
The modified solution is a mixed aqueous solution of chitosan, phosphoric acid and magnesium chloride, wherein the concentration of the chitosan is 3.5 percent of chitosan, 2 percent of phosphoric acid and 0.3 percent of magnesium chloride.
Example 3
The gypsum mortar for building the inner wall is characterized by being prepared from the following raw materials: 90 parts of modified building gypsum, 40 parts of machine-made sand, 5 parts of vitrified micro bubbles, 1 part of modified fiber, 10 parts of ash calcium, 0.5 part of methyl hydroxyethyl cellulose ether, 0.5 part of water-retaining agent, 0.3 part of redispersible latex powder, 0.5 part of slag powder and 0.3 part of magnesium aluminum silicate. Wherein the water-retaining agent is prepared from hydroxypropyl methyl cellulose and kaolin powder according to the weight ratio of 1: 1, in terms of mass ratio.
The modified fiber is prepared by the following steps: taking polyester resin, adding polyethylene glycol accounting for 12 percent of the mass of the polyester resin and aluminum silicate accounting for 5 percent of the mass of the polyester resin, blending, melting, spinning and chopping to obtain primary modified fiber; wetting the primary modified fiber with 6% phosphatase solution, standing for 30-40min, and inactivating enzyme at high temperature to obtain modified fiber.
The modified building gypsum is prepared by the following steps: taking phosphogypsum powder, adding 1-2% of nano calcium carbonate by mass of the phosphogypsum powder, and stirring to form a mixture; adding a modified solution with the mass 15 times that of the mixture for homogenizing, stirring at 50-60 ℃ for 10min, and drying at 130 ℃ to obtain the modified building gypsum.
The modified solution is a mixed aqueous solution of chitosan, phosphoric acid and magnesium chloride, wherein the concentration of the chitosan is 4% of chitosan, 3% of phosphoric acid and 0.4% of magnesium chloride.
Comparative example 1
Comparative example 1 differs from example 1 in that instead of modified building gypsum, building gypsum was used; the rest is the same.
Comparative example 2
Comparative example 1 differs from example 1 in that polyester fibers are used instead of the modified fibers; the rest is the same.
Comparative example 3
Comparative example 3 differs from example 1 in that building gypsum, polyester fiber; the rest is the same.
Experimental example 1
Taking the ready-mixed mortar raw material samples prepared in the examples 1-3 and the comparisons 1-3 respectively; adding water with the mass of 20% of that of the ready-mixed mortar raw material sample into the ready-mixed mortar raw material sample, and stirring and mixing the mixture to prepare gypsum mortar; the performance of the gypsum mortar is tested according to a JGJ70-90 building mortar basic performance test method, each premixed mortar raw material sample is tested for 3 times, and an average value is obtained. The results of the performance test of the gypsum mortar are shown in Table 1.
TABLE 1 Gypsum mortar Properties
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| 28d compressive Strength (MPa) | 14.7 | 15.3 | 13.6 | 13.3 | 8.7 | 8.8 |
| Immersion degree (mm) | 83 | 81 | 78 | 89 | 91 | 93 |
| Degree of delamination (mm) | 21 | 18 | 24 | 28 | 26 | 31 |
| 28d shrinkage value (mm/m) | 0.532 | 0.507 | 0.564 | 0.673 | 0.702 | 0.786 |
| Impermeability (MPa) | 0.39 | 0.41 | 0.37 | 0.31 | 0.28 | 0.26 |
It should be noted that the above examples and test examples are only for further illustration and understanding of the technical solutions of the present invention, and are not to be construed as further limitations of the technical solutions of the present invention, and the invention which does not highlight essential features and significant advances made by those skilled in the art still belongs to the protection scope of the present invention.
Claims (10)
1. The gypsum mortar for building the inner wall is characterized by being prepared from the following raw materials: 60-90 parts of modified building gypsum, 10-40 parts of machine-made sand, 0.5-5 parts of vitrified micro bubbles, 0.5-1 part of modified fiber, 3-10 parts of ash calcium, 0.1-0.5 part of retarder, 0.1-0.5 part of water-retaining agent, 0.1-0.3 part of rubber powder, 0.1-0.5 part of dispersant and 0.1-0.3 part of lubricant.
2. The gypsum mortar for interior wall masonry of claim 1, wherein the modified fiber is prepared by: adding polyethylene glycol and aluminum silicate into polyester resin, blending, melt spinning and chopping to obtain primary modified fiber; wetting the primary modified fiber with an enzyme solution, standing for 30-40min, and inactivating enzyme at high temperature to obtain the modified fiber.
3. The gypsum mortar for interior wall masonry according to claim 2, wherein the addition amount of polyethylene glycol is 10-12% by mass of the polyester resin, and the addition amount of aluminum silicate is 3-5% by mass of the polyester resin.
4. The gypsum mortar for interior wall masonry of claim 2, wherein the enzyme solution is a phosphatase solution with a concentration of 5-6%.
5. The gypsum mortar for interior wall masonry of claim 1, wherein the modified building gypsum is prepared by: taking phosphogypsum powder, adding nano calcium carbonate, and stirring to obtain a mixture; adding modified solution 15 times of the mixture, homogenizing, stirring at 50-60 deg.C for 10min, and oven drying at 130 deg.C to obtain modified building gypsum.
6. The gypsum mortar for interior wall masonry according to claim 5, wherein the amount of the nano calcium carbonate is 1-2% by mass of the phosphogypsum powder.
7. The gypsum mortar for interior wall masonry according to claim 5, wherein the modifying solution is a mixed aqueous solution of chitosan, phosphoric acid, magnesium chloride, wherein the concentration of chitosan is 3-4% chitosan, 1-3% phosphoric acid, 0.2-0.4% magnesium chloride.
8. The gypsum mortar for interior wall masonry of claim 1, wherein the set retarder is methyl hydroxyethyl cellulose ether; the water-retaining agent is prepared from hydroxypropyl methyl cellulose and kaolin powder according to the weight ratio of 1: 1 in a mass ratio; the rubber powder is re-dispersible latex powder.
9. The gypsum mortar for interior wall masonry according to claim 1, wherein the dispersant is slag powder; the lubricant is magnesium aluminum silicate.
10. A method for using the gypsum mortar for interior wall masonry according to any one of claims 1 to 9, wherein the gypsum mortar is diluted with water in an amount of 25 to 30% by weight, uniformly stirred and mixed, and after standing for 8 to 10 minutes, stirred for 3 to 5 minutes; the inner partition wall is built by bonding the concrete hollow blocks by adopting the mortar which is well stirred.
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| CN101691292A (en) * | 2009-09-30 | 2010-04-07 | 谢日清 | Lightweight wall plaster |
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| CN111268956A (en) * | 2020-03-18 | 2020-06-12 | 殷石 | High-strength modified synthetic fiber reinforced pervious concrete and preparation method thereof |
| CN111848059A (en) * | 2020-02-27 | 2020-10-30 | 杭州左工建材有限公司 | Water-control moisture-proof mortar for basement |
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