CN114105583A - Special high-strength waterproof gypsum mortar for house outer wall - Google Patents
Special high-strength waterproof gypsum mortar for house outer wall Download PDFInfo
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- CN114105583A CN114105583A CN202111228530.8A CN202111228530A CN114105583A CN 114105583 A CN114105583 A CN 114105583A CN 202111228530 A CN202111228530 A CN 202111228530A CN 114105583 A CN114105583 A CN 114105583A
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- gypsum mortar
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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
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/147—Calcium sulfate hemi-hydrate with a specific crystal form beta-hemihydrate
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (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 field of building materials, and particularly relates to special high-strength waterproof gypsum mortar for an outer wall of a house. The special high-strength waterproof gypsum mortar has strong bonding performance with other types of phosphogypsum-based materials, and can fully avoid the situations of cracking, peeling and even integral falling of a wall body by using the special high-strength waterproof gypsum mortar. As the special high-strength waterproof gypsum mortar is not subjected to any adverse phenomenon after being soaked for more than 10 months through test detection, other problems caused by soaking in water can be effectively avoided.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to special high-strength waterproof gypsum mortar for an outer wall of a house.
Background
With the development of industrial technology, the income brought by the development of domestic chemical enterprises is unbearable, but the influence on the environment is also inconstant. Desulfurized gypsum produced by power plant desulfurization, phosphogypsum produced by phosphoric acid production in a phosphorization plant and the like belong to industrial waste residues, a large amount of land can be occupied by long-term landfill, the environment is polluted, and the accumulation amount of industrial byproduct gypsum reaches hundreds of millions of tons at present, so that the treatment of gypsum is urgently needed to be solved.
At present, the demand of phosphate fertilizers rises year by year, 850 million tons of phosphogypsum is industrial waste residue discharged in the process of producing the phosphate fertilizers in 2014, 3 tons of phosphogypsum are generated when 1 ton of the phosphate fertilizers are produced, namely 2550 million tons of phosphogypsum are discharged every year, and a large amount of phosphogypsum is stockpiled and treated, so that the land and underground water pollution is caused. The existing phosphogypsum is mainly used for treating cement retarders, building blocks and plastering materials, but the utilization rate is extremely low.
In recent years, under the vigorous promotion of national energy-saving and emission-reducing policies, the building energy-saving technology in China is rapidly developed, the external wall heat-insulating technology occupies a leading position, and the method makes positive contribution to the development of building energy-saving work. At present, the most common method in the external wall heat insulation method is to paste a heat insulation board, and in an external wall heat insulation system, a layer of anti-crack mortar needs to be smeared on the surface of the heat insulation board, so that the effect of improving the durability of the heat insulation system is achieved.
A large amount of cement is used in the traditional anti-crack mortar, and the higher cement mixing amount is easy to shrink to cause hollowing and cracking, so that the durability of a heat insulation system is influenced, and huge energy consumption exists. The plastering mortar is generally composed of silicate series cement, sand, water and the like, is one of building materials with large application amount and wide application range in building engineering, is widely applied to the engineering of building masonry, plastering and the like, more than 60 percent of the buildings in the current building engineering in China still use wall materials such as bricks, building blocks and the like, and the building mortar used in the construction of building masonry and plastering still mainly comprises cement mortar or mixed mortar. The strength of the mortar has great influence on the strength of the building, the service life and the safety factor of the building are directly influenced, if the strength of the mortar is not enough, the use function of the building is seriously lost, however, the existing cement mortar or mixed mortar used for the construction of the outer wall of the building has the problem of low strength.
With the improvement of the popularization and use requirements of the phosphogypsum product, a series of adverse effects can be caused by using the tile glue produced by the common process on the market for house decoration, such as: the ceramic tile is not firmly bonded with a wall body, so that the ceramic tile falls off and water seepage is caused seriously, and unnecessary potential safety hazards are caused; the big local unable ceramic tile glue scheduling problem of using the water consumption, it is present main research direction to use waterproof gypsum base ceramic tile glue of excelling in to come abundant avoid the similar condition to take place.
Therefore, it is urgent to find a high-strength waterproof gypsum mortar which uses phosphogypsum as a main raw material, can fully utilize phosphogypsum waste and has excellent bonding strength and waterproof performance.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a special high-strength waterproof gypsum mortar for an outer wall of a house, which is realized by the following technical scheme:
a special high-strength waterproof gypsum mortar for house exterior walls is composed of the following raw materials in parts by weight: 60-70 parts of high-temperature gypsum powder, 20-30 parts of fine sand, 10-30 parts of cement clinker, 0.1-0.5 part of waterproof agent, 0.1-0.5 part of water reducing agent, 0.3-0.8 part of rubber powder and 0.1-0.5 part of cellulose.
Further, the high-temperature gypsum powder is gypsum powder calcined at a high temperature of 300-450 ℃, and contains about 30% of anhydrous type beta gypsum.
Further, the cement clinker is conventional portland cement clinker, and the 28d strength is more than 52.5 MPa.
Further, the water reducing agent is a polycarboxylic acid water reducing agent.
Furthermore, the rubber powder is common polymer materials such as plastic powder.
Further, the cellulose is hydroxypropyl methyl cellulose commonly available in the market.
Further, the water-proofing agent is a fatty acid water-proofing agent (self-prepared alkali-resistant dry powder) or an organosilicon water-proofing agent (self-prepared alkali-resistant water agent). The dry powder can be directly mixed with gypsum powder and other raw materials; when the water aqua is used, the water aqua is emulsified and stirred at high speed together with actual water (the effect is best when the emulsifying speed is over 1200 r/min).
The preparation method of the special high-strength waterproof gypsum mortar for the outer wall of the house comprises the following steps:
(1) taking the following raw materials in parts by weight: 60-70 parts of high-temperature gypsum powder, 20-30 parts of fine sand, 10-30 parts of cement clinker, 0.1-0.5 part of waterproof agent, 0.1-0.5 part of water reducing agent, 0.3-0.8 part of rubber powder and 0.1-0.5 part of cellulose;
(2) mixing materials: fully stirring the materials for 5 to 10 minutes by using a mixing device to fully stir the materials.
The use method of the special high-strength waterproof gypsum mortar for the outer wall of the house comprises the following steps: after the coating area is measured and calculated, 30-40% of water is added to each kilogram of special high-strength waterproof gypsum mortar, the special high-strength waterproof gypsum mortar is stirred for 90-120 s by using a high-speed forced stirrer, and the stirred slurry is directly coated on the wall surface.
Compared with the prior art, the invention has the technical effects that:
(1) the special high-strength waterproof gypsum mortar can replace common cement mortar on the market to be used on the outer wall of a house, and the problem that the gypsum mortar cannot be used in places such as the outer wall of the house is solved.
(2) The special high-strength waterproof gypsum mortar has excellent bonding strength and waterproof performance, can effectively prevent moisture in the water using process from invading a wall body to damage a bonding layer, and prolongs the service life of the wall body.
(3) The application takes the phosphogypsum as a main material, fully utilizes the phosphogypsum waste, and achieves the technical effects of energy conservation, emission reduction and cyclic utilization.
(4) The special high-strength waterproof gypsum mortar has strong bonding performance with other types of phosphogypsum-based materials.
(5) The special high-strength waterproof gypsum mortar can fully avoid the cracking, peeling and even the integral falling of the wall. As the special high-strength waterproof gypsum mortar is not subjected to any adverse phenomenon after being soaked for more than 10 months through test detection, other problems caused by soaking in water can be effectively avoided.
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
(1) Taking the following raw materials: 65kg of high-temperature gypsum powder, 25kg of fine sand, 20kg of cement clinker, 0.3kg of waterproof agent, 0.3kg of water reducing agent, 0.5kg of rubber powder and 0.3kg of cellulose;
(2) mixing materials: and fully stirring the materials for 7.5 minutes by using a mixing device to fully stir the materials.
Example 2
(1) Taking the following raw materials: 60kg of high-temperature gypsum powder, 20kg of fine sand, 30kg of cement clinker, 0.3kg of waterproof agent, 0.3kg of water reducing agent, 0.5kg of rubber powder and 0.3kg of cellulose;
(2) mixing materials: fully stirring the materials for 5 to 10 minutes by using a mixing device to fully stir the materials.
Example 3
(1) Taking the following raw materials: 70kg of high-temperature gypsum powder, 20kg of fine sand, 10kg of cement clinker, 0.3kg of waterproof agent, 0.3kg of water reducing agent, 0.5kg of rubber powder and 0.3kg of cellulose;
(2) mixing materials: fully stirring the materials for 5 to 10 minutes by using a mixing device to fully stir the materials.
Example 4
(1) Taking the following raw materials: 60kg of high-temperature gypsum powder, 30kg of fine sand, 10kg of cement clinker, 0.3kg of waterproof agent, 0.3kg of water reducing agent, 0.5kg of rubber powder and 0.3kg of cellulose;
(2) mixing materials: fully stirring the materials for 5 to 10 minutes by using a mixing device to fully stir the materials.
Example 5
(1) Taking the following raw materials: 65kg of high-temperature gypsum powder, 25kg of fine sand, 20kg of cement clinker, 0.5kg of waterproof agent, 0.5kg of water reducing agent, 0.8kg of rubber powder and 0.5kg of cellulose;
(2) mixing materials: and fully stirring for 5 minutes by using a mixing device to fully stir various materials.
Example 6
(1) Taking the following raw materials: 65kg of high-temperature gypsum powder, 25kg of fine sand, 20kg of cement clinker, 0.1kg of waterproof agent, 0.1kg of water reducing agent, 0.3kg of rubber powder and 0.1kg of cellulose;
(2) mixing materials: fully stirring for 10 minutes by using a mixing device to fully stir various materials.
Comparative example 1
The procedure was carried out according to example 1 of patent application CN 202010971045.9.
Comparative example 2
The procedure was carried out according to example 1 of patent application CN 201710087767.6.
The examples were compared with the products obtained in comparative examples 1-2:
compared with comparative example 1, the application has the following advantages:
(1) all the raw materials are mixed, and secondary processing is not needed;
(2) the mortar of the application does not need to be calcined and ground;
(3) the product obtained by the application has waterproof performance, and can prevent the hydration and water damage of the surface layer of the wall body.
(4) The high-temperature gypsum used in the product has the strength after being specially excited, the breaking resistance is more than 12MPa, the compression resistance is more than 40MPa, and the product index is higher than the standard value of related wall materials.
Compared with comparative example 2, the application has the following advantages:
(1) the present application does not require the use of retarders. The use of retarders results in a loss of strength to varying degrees.
(2) The product obtained by the application has waterproof performance, and can prevent the hydration and water damage of the surface layer of the wall body.
(3) The high-temperature gypsum used in the product has the strength after being specially excited, the breaking resistance is more than 12MPa, the compression resistance is more than 40MPa, and the product index is higher than the standard value of related wall materials.
In addition, the smoothness of the surface layer of the wall body after the product is used depends on the fineness of the fine sand, and the smoothness of the surface layer is better when the sand is finer. The high-temperature gypsum used in the product has certain bonding force, and the obtained product has strong bonding and drawing resistance. The product has waterproof performance, and long-term test tracking results show that the waterproof performance of the product is not changed after long-term soaking or high-temperature baking.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the technical solution of the present invention is not limited to the above-described embodiments, and many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (9)
1. A special high-strength waterproof gypsum mortar for house exterior walls is characterized by comprising the following raw materials in parts by weight: 60-70 parts of high-temperature gypsum powder, 20-30 parts of fine sand, 10-30 parts of cement clinker, 0.1-0.5 part of waterproof agent, 0.1-0.5 part of water reducing agent, 0.3-0.8 part of rubber powder and 0.1-0.5 part of cellulose.
2. The special high-strength waterproof gypsum mortar for the external wall of a house according to claim 1, wherein the high-temperature gypsum powder is gypsum powder calcined at a high temperature of 300-450 ℃, and contains about 30% of anhydrous type II beta gypsum.
3. The special high-strength waterproof gypsum mortar for house external walls according to claim 1, wherein the cement clinker is conventional portland cement clinker, and 28d strength is more than 52.5 MPa.
4. The special high-strength waterproof gypsum mortar for house external walls according to claim 1, wherein the water reducing agent is a polycarboxylic acid water reducing agent.
5. The special high-strength waterproof gypsum mortar for the external wall of a house according to claim 1, wherein the rubber powder is common polymer materials such as plastic powder.
6. The special high-strength waterproof gypsum mortar for house external walls according to claim 1, wherein the cellulose is hydroxypropyl methyl cellulose.
7. The special high-strength waterproof gypsum mortar for house external walls as claimed in claim 1, wherein the waterproof agent is a fatty acid type waterproof agent or an organosilicon waterproof agent.
8. The method for preparing the special high-strength waterproof gypsum mortar for the external wall of the house in claim 1, which comprises the following steps:
(1) taking the following raw materials in parts by weight: 60-70 parts of high-temperature gypsum powder, 20-30 parts of fine sand, 10-30 parts of cement clinker, 0.1-0.5 part of waterproof agent, 0.1-0.5 part of water reducing agent, 0.3-0.8 part of rubber powder and 0.1-0.5 part of cellulose;
(2) mixing materials: fully stirring the materials for 5 to 10 minutes by using a mixing device to fully stir the materials.
9. The use method of the special high-strength waterproof gypsum mortar for the external wall of the house, as set forth in claim 1, comprises the following steps: after the coating area is measured and calculated, 30-40% of water is added to each kilogram of special high-strength waterproof gypsum mortar, the special high-strength waterproof gypsum mortar is stirred for 90-120 s by using a high-speed forced stirrer, and the stirred slurry is directly coated on the wall surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111228530.8A CN114105583A (en) | 2021-10-21 | 2021-10-21 | Special high-strength waterproof gypsum mortar for house outer wall |
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| CN202111228530.8A CN114105583A (en) | 2021-10-21 | 2021-10-21 | Special high-strength waterproof gypsum mortar for house outer wall |
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| CN114105583A true CN114105583A (en) | 2022-03-01 |
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| CN202111228530.8A Pending CN114105583A (en) | 2021-10-21 | 2021-10-21 | Special high-strength waterproof gypsum mortar for house outer wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114988836A (en) * | 2022-06-20 | 2022-09-02 | 贵州开磷磷石膏综合利用有限公司 | High-strength gypsum mortar and preparation method and application thereof |
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| WO2015200156A1 (en) * | 2014-06-27 | 2015-12-30 | Boral Ip Holdings (Australia) Pty Limited | Ultra-lightweight gypsum wallboard |
| CN106904922A (en) * | 2017-02-18 | 2017-06-30 | 四川华邦保和涂料有限公司 | A kind of preparation method of ardealite base exterior wall internal insulation anticracking grout |
| WO2019080527A1 (en) * | 2017-10-23 | 2019-05-02 | 北新集团建材股份有限公司 | Gypsum-based mechanical spraying plastering mortar, preparation method therefor, and gypsum-based mechanical spraying slurry |
| CN112225519A (en) * | 2020-10-22 | 2021-01-15 | 上海恪耐新材料科技有限公司 | Method for improving strength of gypsum building material product |
-
2021
- 2021-10-21 CN CN202111228530.8A patent/CN114105583A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015200156A1 (en) * | 2014-06-27 | 2015-12-30 | Boral Ip Holdings (Australia) Pty Limited | Ultra-lightweight gypsum wallboard |
| CN106904922A (en) * | 2017-02-18 | 2017-06-30 | 四川华邦保和涂料有限公司 | A kind of preparation method of ardealite base exterior wall internal insulation anticracking grout |
| WO2019080527A1 (en) * | 2017-10-23 | 2019-05-02 | 北新集团建材股份有限公司 | Gypsum-based mechanical spraying plastering mortar, preparation method therefor, and gypsum-based mechanical spraying slurry |
| CN112225519A (en) * | 2020-10-22 | 2021-01-15 | 上海恪耐新材料科技有限公司 | Method for improving strength of gypsum building material product |
Non-Patent Citations (1)
| Title |
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| 赵云龙 等: "《石膏应用技术问答》", 30 September 2016, 中国建材工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114988836A (en) * | 2022-06-20 | 2022-09-02 | 贵州开磷磷石膏综合利用有限公司 | High-strength gypsum mortar and preparation method and application thereof |
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Application publication date: 20220301 |
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