CN111848088A - Gypsum-based fireproof door core plate and preparation method thereof - Google Patents
Gypsum-based fireproof door core plate and preparation method thereof Download PDFInfo
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- CN111848088A CN111848088A CN202010741168.3A CN202010741168A CN111848088A CN 111848088 A CN111848088 A CN 111848088A CN 202010741168 A CN202010741168 A CN 202010741168A CN 111848088 A CN111848088 A CN 111848088A
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Classifications
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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
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/70—Door leaves
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
-
- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
- C04B2111/40—Porous or lightweight 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
Abstract
The invention provides a gypsum-based fireproof door core board which is characterized by comprising the following raw materials in parts by weight: 500 parts of phosphogypsum-based alpha high-strength gypsum, 0.1-1.5 parts of fiber, 5-8 parts of foaming agent, 1-2 parts of surfactant, 5-10 parts of emulsion, 0.5-1 part of PVA and 250 parts of water. The dry density of the core plate of the fire door prepared by the invention is 280-400kg/m3, and the obtained a-type high-strength gypsum is prepared by taking the industrial byproduct phosphogypsum as a raw material, so that waste is changed into valuable. The magnesite material has the characteristics of good stability, high fire resistance, no corrosion to steel plates and high production efficiency, and effectively overcomes the defects of moisture absorption and low production efficiency of the existing magnesite material.
Description
Technical Field
The invention relates to the technical field of production of fireproof door core boards, in particular to a gypsum-based fireproof door core board and a preparation method thereof.
Background
The fireproof door core plate plays a main role in the fireproof and heat-insulating performance of the fireproof door, is a key project for fire door engineering inspection and acceptance, is widely applied to the building fields of civil buildings and the like, and can effectively inhibit personal or public property loss caused by fire.
In recent years, the fireproof door core board in the market is made of light foamed magnesite material. The magnesite fireproof door core board has the advantages of low volume weight, good fireproof performance, light weight, high strength, low manufacturing cost and the like. However, the raw material is magnesite, and the risk of production prohibition of the raw material can be faced in the future. The magnesite material belongs to alkali metal salt, and after the board made of the magnesite material absorbs moisture, chloride ions and magnesium ions in the board can generate replacement reaction with steel, so that the steel is corroded, the service life of a fireproof door is shortened, and the phenomenon is more serious in rainy seasons and air humid areas. The activity of the magnesite material can be reduced along with storage time and environmental changes, and many small and medium-sized enterprises in the domestic fireproof door market can not control storage conditions well, so that the product quality is reduced. And the magnesite fireproof door core board has low production efficiency, and is demoulded in 8-12 hours in summer and 24 hours in winter.
In view of the above background art and the defects of the magnesite material fire door core board, the inventor of the present invention has obtained the present invention through long-term research and demonstration of multiple sets of experiments.
Disclosure of Invention
The invention aims to provide a gypsum-based fireproof door core board and a preparation method thereof. The gypsum-based fireproof door core plate is prepared from alpha-type high-strength gypsum serving as a raw material, belongs to comprehensive utilization of waste, and is green and environment-friendly. Has the characteristics of clean production, no corrosion to steel plates, no toxic smoke, high production efficiency and the like,
the above purpose of the invention is realized by the following technical scheme:
the gypsum-based fireproof door core plate is prepared from the following raw materials in parts by weight: 500 parts of phosphogypsum-based alpha high-strength gypsum, 0.1-1.5 parts of fiber, 5-8 parts of foaming agent, 1-2 parts of surfactant, 5-10 parts of emulsion, 0.5-1 part of PVA and 250 parts of water.
As a preferable mode of the invention, the initial setting time of the phosphogypsum-based alpha high-strength gypsum is more than or equal to 8min, the final setting time is less than or equal to 30min, the 2h flexural strength is more than or equal to 5.0MPa, and the compressive strength is more than or equal to 40 MPa.
In a preferred embodiment of the present invention, the fibers are polypropylene fibers, polyester fibers, or glass fibers.
In a preferred embodiment of the present invention, the length of the fiber is 10 to 20 mm.
In a preferred embodiment of the present invention, the foaming agent is a protein-based composite foaming agent.
In a preferred embodiment of the present invention, the surfactant is an anionic surfactant, a nonionic surfactant, or a complex surfactant.
As a preferable mode of the present invention, the surfactant is selected from sodium fatty alcohol-polyoxyethylene ether sulfate, sodium dodecylbenzene sulfonate or ammonium fatty alcohol-polyoxyethylene ether sulfate.
In a preferred embodiment of the present invention, the emulsion is a tertiary-acetate-acrylate emulsion or a styrene-acrylate emulsion.
In a preferred embodiment of the present invention, the PVA is cold water-soluble polyvinyl alcohol and has a polymerization degree of 1100 or 1700.
In a preferred embodiment of the present invention, the fineness of the PVA is 100 or 150 mesh.
In addition, the invention also provides a preparation method of the gypsum-based fireproof door core board, which comprises the following steps:
weighing alpha high-strength gypsum, fiber, a foaming agent, a surfactant, emulsion, PVA (polyvinyl acetate) and water according to the weight part ratio;
mixing a foaming agent, a surfactant and water according to the ratio of 1: 40-80 to obtain the foaming agent aqueous solution.
Mixing PVA and water according to the proportion of 1: dissolving at a ratio of 10-20 to obtain PVA aqueous solution.
Pouring the rest water and the emulsion into a stirrer, adding the alpha-type high-strength gypsum while stirring, and stirring for 1-5min to obtain mixed slurry;
adding foam prepared by a foaming agent aqueous solution through a foaming machine into the mixed slurry, stirring for 1-4min, and adding a PVA solution during stirring to obtain foamed gypsum mixed slurry;
and pouring the mixed slurry prepared in the step into a mold, standing for 1-4h, and demolding to obtain the fireproof door core plate.
The dry density of the fireproof door core plate prepared by the invention is 280-400kg/m3The obtained a-type high-strength gypsum is prepared by taking the industrial by-product phosphogypsum as a raw material, so that waste is changed into valuable. The magnesite material has the characteristics of good stability, high fire resistance, no corrosion to steel plates and high production efficiency, and effectively overcomes the defects of moisture absorption and low production efficiency of the existing magnesite material.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the scope of the present invention is not limited thereto.
A gypsum-based fireproof door core plate comprises the following raw materials in parts by weight: 500 parts of phosphogypsum-based alpha high-strength gypsum, 0.1-1.5 parts of fiber, 5-8 parts of foaming agent, 1-2 parts of surfactant, 5-10 parts of emulsion, 0.5-1 part of PVA and 250 parts of water.
In the invention, the initial setting time of the phosphogypsum-based alpha high-strength gypsum is more than or equal to 8min, the final setting time is less than or equal to 30min, the 2h flexural strength is more than or equal to 5.0MPa, and the compressive strength is more than or equal to 40 MPa; in particular to alpha-type high-strength gypsum prepared by a dynamic steam pressing method.
In the invention, the fiber is polypropylene fiber, polyester fiber or glass fiber;
in a preferable mode of the invention, the length of the fiber is 10-20 mm; more preferably 10-15 mm.
In a preferred embodiment of the present invention, the foaming agent is a protein-based composite foaming agent.
In the invention, the surfactant is an anionic surfactant, a nonionic surfactant or a compound surfactant.
As a preferable mode of the invention, the surfactant is fatty alcohol-polyoxyethylene ether sodium sulfate, sodium dodecyl benzene sulfonate or fatty alcohol-polyoxyethylene ether ammonium sulfate.
In a preferred embodiment of the present invention, the emulsion is a tertiary-acetate-acrylate emulsion or a styrene-acrylate emulsion.
In a preferred embodiment of the present invention, the PVA is cold water-soluble polyvinyl alcohol and has a polymerization degree of 1100 or 1700.
In a preferred embodiment of the present invention, the fineness of the PVA is 100 or 150 mesh.
The following is a detailed description of specific embodiments.
Example 1
A gypsum-based fireproof door core board and a preparation method thereof are disclosed, the following raw materials are weighed according to the proportion: 500 parts of alpha high-strength gypsum, 1.5 parts of fiber, 5 parts of foaming agent, 1.2 parts of surfactant, 5 parts of tertiary vinyl acetate-acrylic emulsion, 0.5 part of PVA and 230 parts of water.
The alpha-type high-strength gypsum is prepared by taking water-washed phosphogypsum as a raw material and adopting a dynamic steam pressing method; it is produced by Vanfu chemical technology Limited, with a mark of a 40; the initial setting time is 18min, the final setting time is 26min, the 2h flexural strength is 5.6MPa, and the drying compressive strength is 47 MPa;
the fiber is polypropylene fiber with the length of 10-12 mm;
the foaming agent is HTW-1 which is purchased from Henan Huatai new material science and technology company, Inc.;
the surfactant is sodium dodecyl benzene sulfonate.
The emulsion is a tert-vinyl acetate-acrylic emulsion of Shanghai Bao special environment-friendly new material Co.Ltd;
the PVA is cold water instant polyvinyl alcohol 1788 of Hebei Shenpeng chemical company Limited;
the preparation method comprises the following steps: mixing a foaming agent, a surfactant and water according to the ratio of 1: 40 to obtain a foaming agent aqueous solution; mixing PVA and water according to the proportion of 1: dissolving at a ratio of 13 to obtain an aqueous PVA solution. Pouring the residual water and the emulsion into a stirrer, adding the alpha-type high-strength gypsum while stirring, stirring for 3min, beating a foaming agent into foam through a foaming machine, adding the foam into the stirrer, stirring for 3min, adding a PVA (polyvinyl alcohol) aqueous solution during stirring to obtain foamed gypsum mixed slurry, pouring the mixed slurry into a mold, standing for 2.5h, and demolding to obtain the fireproof door core plate.
The dry density of the fireproof door core plate prepared by the invention is 350kg/m3The drying bending strength is 0.63Mpa, the drying compressive strength is 1.2Mpa, and the grade A1 fire-proof grade of GB 8624-2006' fire performance grade of building materials and products is met.
Example 2
A gypsum-based fireproof door core board and a preparation method thereof are disclosed, the following raw materials are weighed according to the proportion: 400 parts of alpha high-strength gypsum, 0.2 part of fiber, 7 parts of foaming agent, 1.8 parts of surfactant, 8 parts of tert-vinyl acetate-acrylic emulsion, 0.8 part of PVA and 190 parts of water;
the alpha-type high-strength gypsum is prepared by taking the phosphogypsum which is washed by water as a raw material and adopting a dynamic steam pressing method. The initial setting time is 19min, the final setting time is 27min, the 2h flexural strength is 5.2MPa, and the drying compressive strength is 45 MPa.
The fibers are polyester fibers.
The foaming agent is a long-acting four-in-one foaming agent purchased from Jinan magnesium Jia diagram novel material development limited company.
The surfactant is sodium AES fatty alcohol polyoxyethylene ether sulfate which is purchased from Guangzhou Chengyi chemical Co.
The emulsion is a styrene-acrylic emulsion purchased from Zhengzhou Fule chemical products Co.
The PVA was BNE-118 available from Bernoy New materials (Beijing) science and technology Co.
The preparation method comprises the following steps: mixing a foaming agent, a surfactant and water according to the ratio of 1: 70, obtaining a foaming agent aqueous solution; mixing PVA and water according to the proportion of 1: dissolving at a ratio of 11 to obtain an aqueous PVA solution. Pouring water and the emulsion into a stirrer, adding alpha-type high-strength gypsum while stirring, stirring for 2min, beating a foaming agent into foam through a foaming machine, adding the foam into the stirrer, stirring for 4min, adding a PVA (polyvinyl alcohol) aqueous solution during stirring to obtain foamed gypsum mixed slurry, pouring the mixed slurry into a mold, standing for 3h, and demolding to obtain the fireproof door core plate.
The dry density of the core plate of the fireproof door prepared by the invention is 330kg/m3, the drying breaking strength is 0.55Mpa, the drying compressive strength is 1.1Mpa, and the core plate of the fireproof door conforms to the A1-grade fire-proof grade of GB8624-2006 Classification on combustion performance of building materials and products.
Example 3
A gypsum-based fireproof door core board and a preparation method thereof are disclosed, the following raw materials are weighed according to the proportion: 450 parts of alpha high-strength gypsum, 0.9 part of fiber, 6 parts of foaming agent, 1.5 parts of surfactant, 9 parts of tertiary vinyl acetate-acrylic emulsion, 0.9 part of PVA and 220 parts of water;
the alpha-type high-strength gypsum is prepared by taking the phosphogypsum which is washed by water as a raw material and adopting a dynamic steam pressing method. The initial setting time is 13min, the final setting time is 19min, the 2h flexural strength is 6.4MPa, and the compressive strength is 52 MPa.
The fibers are glass fibers.
The foaming agent is a cement foaming agent produced by the aviation honest building materials company Limited in the river and the city.
The surfactant is AESA fatty alcohol polyoxyethylene ether ammonium sulfate which is purchased from south Jia chemical technology limited of Guangzhou.
The emulsion is a tert-vinyl acetate-acrylic emulsion of Shanghai Bao special environment-friendly new material Co.
The PVA is 1788 of Chongqing Chuanwei chemical Co., Ltd, China petrochemical group.
The preparation method comprises the following steps: mixing a foaming agent, a surfactant and water according to the ratio of 1: 40 to obtain a foaming agent aqueous solution; mixing PVA and water according to the proportion of 1: dissolving at a ratio of 18 to obtain an aqueous PVA solution. Pouring the residual water and the emulsion into a stirrer, adding the alpha-type high-strength gypsum while stirring, stirring for 2min, beating the foaming agent into foam through a foaming machine, adding the foam into the stirrer, stirring for 5min, adding a PVA (polyvinyl alcohol) aqueous solution during stirring to obtain foamed gypsum mixed slurry, pouring the mixed slurry into a mold, standing for 4h, and demolding to obtain the fireproof door core plate.
The inventionThe dry density of the prepared fireproof door core plate is 345kg/m3The drying bending strength is 0.60Mpa, the drying compressive strength is 1.2Mpa, and the grade A1 fire-proof grade of GB 8624-2006' fire performance grade of building materials and products is met.
Comparative example 1
The difference from the embodiment 1 is that the length of the fiber is 18-25 mm.
Comparative example 2
The difference from the embodiment 1 is that the surfactant is anionic polyacrylamide, and the molecular weight is about 50W.
Comparative example 3
The difference from example 1 is that the preparation method is as follows: mixing a foaming agent, a surfactant and water according to the ratio of 1: 40 to obtain a foaming agent aqueous solution; mixing PVA and water according to the proportion of 1: dissolving at a ratio of 13 to obtain an aqueous PVA solution. And pouring the residual water and the emulsion into a stirrer, adding the alpha-type high-strength gypsum while stirring, stirring for 3min, adding the foaming agent into the stirrer, stirring for 3min, adding the PVA aqueous solution during stirring to obtain foamed gypsum mixed slurry, pouring the mixed slurry into a mold, standing for 2.5h, and demolding to obtain the fireproof door core plate.
Performance testing
1. The fluidity during stirring was divided into good, medium and poor.
| Examples | Degree of fluidity | Oven-dried breaking strength, MPa | Oven dry compressive strength, MPa |
| Example 1 | Good taste | 0.63 | 1.2 |
| Example 2 | Good taste | 0.55 | 1.1 |
| Example 3 | Good taste | 0.60 | 1.2 |
| Comparative example 1 | Difference (D) | 0.42 | 1.0 |
| Comparative example 2 | Difference (D) | 0.31 | 0.9 |
| Comparative example 3 | Difference (D) | 0.40 | 0.9 |
The foregoing is illustrative of the present invention and is provided for the purpose of illustration only.
Claims (10)
1. The gypsum-based fireproof door core board is characterized by comprising the following raw materials in parts by weight: 500 parts of phosphogypsum-based alpha high-strength gypsum, 0.1-1.5 parts of fiber, 5-8 parts of foaming agent, 1-2 parts of surfactant, 5-10 parts of emulsion, 0.5-1 part of PVA and 250 parts of water.
2. The gypsum-based fire door core board according to claim 1, wherein the phosphogypsum-based alpha high-strength gypsum has an initial setting time of not less than 8min, a final setting time of not more than 30min, a 2h flexural strength of not less than 5.0MPa and a compressive strength of not less than 40 MPa.
3. The gypsum-based fire door core of claim 1, wherein the fibers are polypropylene fibers, polyester fibers, or glass fibers.
4. The gypsum-based fire door core board according to any one of claims 1 to 3, wherein the fibers have a length of 10 to 20 mm.
5. The gypsum-based fire door core of claim 1, wherein the foaming agent is a protein-based composite foaming agent.
6. The gypsum-based fire door core board of claim 1, wherein the surfactant is an anionic surfactant, a nonionic surfactant, or a built surfactant.
7. The gypsum-based fire door core board of claim 6, wherein the surfactant is selected from sodium fatty alcohol polyoxyethylene ether sulfate, sodium dodecyl benzene sulfonate, or ammonium fatty alcohol polyoxyethylene ether sulfate.
8. The gypsum-based fire door core board of claim 1, wherein the emulsion is a tertiary-acetate-acrylate emulsion or a styrene-acrylate emulsion.
9. The gypsum-based fire door core board of claim 1, wherein the PVA is cold water-soluble polyvinyl alcohol having a degree of polymerization of 1100 or 1700.
10. The gypsum-based fire door core board according to claim 1, wherein the fineness of the PVA is 100 or 150 mesh.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114409436A (en) * | 2022-01-18 | 2022-04-29 | 贵州正和天筑科技有限公司 | Phosphogypsum fireproof door core filler and preparation method thereof |
| CN114621026A (en) * | 2021-05-20 | 2022-06-14 | 瓮福化工科技有限公司 | Gypsum-based light sound insulation prefabricated groove heat insulation board and preparation method thereof |
| CN114853439A (en) * | 2022-06-01 | 2022-08-05 | 瓮福（集团）有限责任公司 | Phosphogypsum-based fireproof door core board and preparation process thereof |
| CN115448682A (en) * | 2022-08-18 | 2022-12-09 | 浙江慧泽科技发展有限公司 | Phosphogypsum fireproof door core material and preparation method thereof |
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| CN114409436A (en) * | 2022-01-18 | 2022-04-29 | 贵州正和天筑科技有限公司 | Phosphogypsum fireproof door core filler and preparation method thereof |
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