CN110950621A - Gypsum foamed door core board and preparation method thereof - Google Patents
Gypsum foamed door core board and preparation method thereof Download PDFInfo
- Publication number
- CN110950621A CN110950621A CN201911296029.8A CN201911296029A CN110950621A CN 110950621 A CN110950621 A CN 110950621A CN 201911296029 A CN201911296029 A CN 201911296029A CN 110950621 A CN110950621 A CN 110950621A
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- Prior art keywords
- gypsum
- foaming
- water
- door core
- foam
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Classifications
-
- 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
-
- 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
- E06B3/7015—Door leaves characterised by the filling between two external panels
-
- 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
-
- 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
- E06B3/7015—Door leaves characterised by the filling between two external panels
- E06B2003/7036—Door leaves characterised by the filling between two external panels of plaster
Abstract
The invention relates to a gypsum foaming door core board and a preparation method thereof, belonging to the field of door industry production, wherein the raw materials of the gypsum foaming door core board comprise a cementing material, calcium hydroxide, fibers, a water reducing agent, foam and water; the cementing material comprises semi-hydrated gypsum and anhydrous gypsum. The preparation method comprises the following steps: mixing a foaming agent and water in proportion to obtain a foaming liquid; mixing the raw materials uniformly according to a proportion; then mixing with water in proportion; adding foam into the obtained slurry in proportion, stirring at a low speed, and mixing uniformly; and injecting the slurry into a mold, and pouring and molding. The invention takes the industrial by-product semi-hydrated gypsum and anhydrous gypsum as main raw materials, expands the use path of the industrial by-product, and the prepared gypsum foamed door core board has the characteristics of light weight, fire resistance, heat preservation, no corrosiveness, no toxicity, no pollution, high mechanical strength and the like, and has simple production process and low cost.
Description
Technical Field
The invention belongs to the field of door industry production, and particularly relates to a gypsum foamed door core board and a preparation method thereof.
Background
With the continuous improvement of the building industry and the living standard, the building industry has been developed at an unprecedented high speed, the requirements on building materials represented by door panels are higher and higher naturally, the strength of the door panels is the most important technical consideration and is also the key point and difficulty of door industry research and development, the strength of the door panels is ultimately dependent on the strength of the door core, and the strength of the door core needs to be effectively improved on the process of door core board preparation.
The traditional fireproof door is prepared from a framework, a door core filling material and fireproof hardware, wherein the filling material of a door core plate is a core material of the fireproof door, and the quality and the performance of the fireproof door are particularly important. Most of the filling materials of the prior door core plate adopt rock wool, aluminum silicate wool, mineral wool, perlite plates, foamed magnesium oxychloride cement plates, foamed cement plates and other materials. Although the materials are light in weight and good in heat insulation, the energy consumption is high in the production process, the materials are formed by organic bonding agents, pollution is generated in the production process and the use process, the environment-friendly requirement is difficult to achieve, and meanwhile, the problems that the core plate of the fireproof door is poor in integrity, short in fire-resistant limit time, poor in mechanical property, easy to deform, high in comprehensive cost, inconvenient to use and the like exist; although the perlite fireproof door core board has better fireproof performance, the board is formed by adopting strong alkaline adhesives such as water glass and the like, so that the perlite fireproof door core board has corrosivity and poorer strength and toughness, and the product is easy to damage in the production and use processes; the vermiculite fire door core plate is formed by adopting an organic or inorganic adhesive, and has the problems of complex production process, regional limitation on raw material sources, large dry density and high comprehensive cost; although the core plate of the magnesium oxychloride cement fireproof door has the characteristics of light weight, high strength, low cost and the like, key technical problems of unstable volume, moisture absorption, halogen return and frost return, warping deformation, short fireproof limit time and the like are not solved effectively all the time; the fireproof door core plate prepared by foaming Portland cement or sulphoaluminate cement has the advantages of easy pulverization on the surface, low later strength and poor stability, and the quality of the fireproof door is seriously influenced.
Disclosure of Invention
In order to overcome the problems in the background art, the invention provides a gypsum foaming door core plate and a preparation method thereof, and the prepared gypsum foaming door core plate has the characteristics of light weight, fire resistance, heat preservation, no corrosiveness, no toxicity, no pollution, high mechanical strength and the like, and is simple in production process and low in cost.
In order to realize the purpose, the invention is realized by the following technical scheme:
a gypsum foaming door core board is characterized in that raw materials of the gypsum foaming door core board material comprise a cementing material, calcium hydroxide, fibers, a water reducing agent, foam and water; the cementing material comprises semi-hydrated gypsum and anhydrous gypsum.
The gypsum foamed door core board comprises the following raw materials in percentage by weight except water: 50% -70% of semi-hydrated gypsum, 10% -40% of anhydrous gypsum, 0.2% -0.5% of fiber, 5% -8% of calcium hydroxide, 0.1% -0.3% of water reducing agent and 4% -10% of foam, wherein the foam is prepared from 1kg of foaming agent and 30-60 kg of water by foaming.
The gypsum foamed door core board comprises the following raw materials in percentage by weight except water: 50-65% of semi-hydrated gypsum, 20-40% of anhydrous gypsum, 0.2-0.5% of fiber, 5-8% of calcium hydroxide, 0.1-0.3% of water reducing agent and 5-8% of foam, wherein the foam is prepared and foamed by 1 volume of foaming agent and 30-60 volumes of water.
The semi-hydrated gypsum is prepared from natural gypsum or industrial by-product gypsum, and has quick setting time and relatively high strength; the anhydrous gypsum is prepared from natural gypsum or industrial by-product gypsum, and is pretreated to ensure that the attached water content is less than 0.6 percent, and the fineness is controlled to be 200 meshes and the rest is less than 1 percent.
Further, the length of the fiber is 10-12 mm.
Further, the water reducing agent is a polycarboxylic acid water reducing agent, and the foaming agent is one of a plant foaming agent and an animal foaming agent.
A preparation method of a gypsum foaming door core board comprises the following specific steps:
1) and (3) dry powder proportioning: mixing the semi-hydrated gypsum, the anhydrous gypsum, the calcium hydroxide, the water reducing agent and the fiber according to a ratio, feeding the mixture into a dry powder stirrer, and uniformly mixing;
2) preparing a foaming liquid: mixing a foaming agent and water in proportion to obtain a foaming liquid;
3) slurry proportioning: adding the mixed dry powder into water in proportion, and uniformly mixing;
4) foaming: placing the foaming liquid in a foaming machine for foaming, and measuring the volume of the foam by using a quantitative container;
5) adding foam in proportion under the stirring state of the slurry, stirring slowly, and mixing uniformly;
6) pouring and forming: and (3) injecting the slurry into a mold, pouring, molding and naturally curing for 3 hours.
In the step 3), the ratio of water to the dry powder is 0.3-0.5.
The invention has the beneficial effects that: the semi-hydrated gypsum and the anhydrous gypsum are used as main raw materials, the setting time has larger difference, the forming speed of the gypsum foaming door core plate can be met, and the use approach of industrial byproducts is expanded; the addition of the fiber and the calcium hydroxide modifies the gypsum, improves the compressive strength, and the reasonable proportion can reduce the bittern returning phenomenon of the gypsum product; the prepared gypsum foamed door core board has the characteristics of light weight, fire resistance, heat preservation, no corrosion, no toxicity, no pollution, high mechanical strength and the like, and is simple in production process and low in cost.
Detailed Description
Example 1
A preparation method of a gypsum foaming door core board comprises the following specific steps:
1) and (3) dry powder proportioning: 65kg of semi-hydrated gypsum, 25kg of anhydrous gypsum, 5.5kg of calcium hydroxide, 0.25kg of water reducing agent and 0.25kg of fiber are proportioned and fed into a dry powder stirrer to be uniformly mixed;
2) preparing a foaming liquid: mixing 1kg of foaming agent with 30kg of water to obtain a foaming solution;
3) slurry proportioning: adding the mixed dry powder into 30kg of water according to a proportion, and uniformly mixing;
4) foaming: placing the foaming liquid in a foaming machine for foaming, and measuring the volume of the foam by using a quantitative container;
5) adding 4 kg of foams under the stirring state of the slurry, slowly stirring, and uniformly mixing;
6) pouring and forming: and (3) injecting the slurry into a mold, pouring, molding and naturally curing for 3 hours.
Example 2
A preparation method of a gypsum foaming door core board comprises the following specific steps:
1) and (3) dry powder proportioning: blending 60 kg of hemihydrate gypsum, 28 kg of anhydrite gypsum, 7.5 kg of calcium hydroxide, 0.2 kg of water reducing agent and 0.3 kg of fiber according to a ratio, feeding the mixture into a dry powder stirrer, and uniformly mixing;
2) preparing a foaming liquid: mixing 1kg of foaming agent with 40 kg of water to obtain a foaming solution;
3) slurry proportioning: adding the mixed dry powder into 30kg of water according to a proportion, and uniformly mixing;
4) foaming: placing the foaming liquid in a foaming machine for foaming, and measuring the volume of the foam by using a quantitative container;
5) adding 4 kg of foams under the stirring state of the slurry, slowly stirring, and uniformly mixing;
6) pouring and forming: and (3) injecting the slurry into a mold, pouring, molding and naturally curing for 3 hours.
Example 3
A preparation method of a gypsum foaming door core board comprises the following specific steps:
1) and (3) dry powder proportioning: 70kg of semi-hydrated gypsum, 20 kg of anhydrous gypsum, 5kg of calcium hydroxide, 0.2 kg of water reducing agent and 0.3 kg of fiber are proportioned according to a proportion, fed into a dry powder stirrer and uniformly mixed;
2) preparing a foaming liquid: mixing 1kg of foaming agent with 50 kg of water to obtain a foaming solution;
3) slurry proportioning: adding the mixed dry powder into 30kg of water according to a proportion, and uniformly mixing;
4) foaming: placing the foaming liquid in a foaming machine for foaming, and measuring the volume of the foam by using a quantitative container;
5) adding 4.5kg of foams under the stirring state of the slurry, slowly stirring, and uniformly mixing;
6) pouring and forming: and (3) injecting the slurry into a mold, pouring, molding and naturally curing for 3 hours.
Example 4
A preparation method of a gypsum foaming door core board comprises the following specific steps:
1) and (3) dry powder proportioning: 67 kg of semi-hydrated gypsum, 20 kg of anhydrous gypsum, 8 kg of calcium hydroxide, 0.25kg of water reducing agent and 0.25kg of fiber are proportioned and fed into a dry powder stirrer to be uniformly mixed;
2) preparing a foaming liquid: mixing 1kg of foaming agent with 30kg of water to obtain a foaming solution;
3) slurry proportioning: adding the mixed dry powder into 30kg of water according to a proportion, and uniformly mixing;
4) foaming: placing the foaming liquid in a foaming machine for foaming, and measuring the volume of the foam by using a quantitative container;
5) adding 4.5kg of foams under the stirring state of the slurry, slowly stirring, and uniformly mixing;
6) pouring and forming: and (3) injecting the slurry into a mold, pouring, molding and naturally curing for 3 hours.
Comparative example 1
A preparation method of a gypsum foaming door core board comprises the following specific steps:
1) and (3) dry powder proportioning: 93kg of semi-hydrated gypsum, 0.25kg of water reducing agent, 0.25kg of fiber and 2kg of retarder are proportioned and fed into a dry powder stirrer to be uniformly mixed;
2) preparing a foaming liquid: mixing 1kg of foaming agent and 30kg of water to obtain foaming liquid;
3) slurry proportioning: adding the mixed dry powder into 30kg of water according to a proportion, and uniformly mixing;
4) foaming: placing the foaming liquid in a foaming machine for foaming, and measuring the volume of the foam by using a quantitative container;
5) adding 4.5kg of foam into the slurry under the stirring state, slowly stirring, and uniformly mixing;
6) pouring and forming: and (3) injecting the slurry into a mold, pouring, molding and naturally curing for 3 hours.
Comparative example 2
A preparation method of a gypsum foaming door core board comprises the following specific steps:
1) and (3) dry powder proportioning: mixing 63.5 kg of semi-hydrated gypsum, 30kg of architectural gypsum, 0.2 kg of water reducing agent, 0.3 kg of fiber and 1.5 kg of retarder according to a ratio, feeding the mixture into a dry powder stirrer, and uniformly mixing;
2) preparing a foaming liquid: mixing 1kg of foaming agent with 30kg of water to obtain a foaming solution;
3) slurry proportioning: adding the mixed dry powder into 70kg of water according to a proportion, and uniformly mixing;
4) foaming: placing the foaming liquid in a foaming machine for foaming, and measuring the volume of the foam by using a quantitative container;
5) adding 4.5kg of foams under the stirring state of the slurry, slowly stirring, and uniformly mixing;
6) pouring and forming: and (3) injecting the slurry into a mold, pouring, molding and naturally curing for 3 hours.
According to the proportion in the above examples and comparative examples, gypsum foam door core board samples are prepared, the initial setting time, the final setting time and the compressive strength of the gypsum foam door core board samples are measured, the phenomenon of halogen return in 7 days of storage at room temperature is observed, and the data statistics result is shown in the following table:
TABLE 1 Performance indices for different groups of core board materials of gypsum foamed door
As can be seen from Table 1, the compression strength of the foamed door core boards obtained in examples 1-4 of the present application is superior to that of comparative examples 1 and 2, and the reasonable proportion of the raw materials such as the semi-hydrated gypsum, the anhydrous gypsum, the calcium hydroxide and the like can obviously improve the compression strength and reduce the occurrence of the halogen returning phenomenon.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (6)
1. A gypsum foaming door core board is characterized in that: the raw materials of the gypsum foamed door core plate comprise a cementing material, calcium hydroxide, fibers, a water reducing agent, foam and water; the cementing material comprises semi-hydrated gypsum and anhydrous gypsum.
2. The gypsum foamed door core sheet according to claim 1, wherein: the gypsum foamed door core board comprises the following raw materials in percentage by weight except water: 50-70% of semi-hydrated gypsum, 10-40% of anhydrous gypsum, 0.2-0.5% of fiber, 5-8% of calcium hydroxide, 0.1-0.3% of water reducing agent and 4-10% of foam, wherein the foam is prepared and foamed by 1 volume of foaming agent and 30-60 volumes of water.
3. The gypsum foamed door core sheet according to claim 1, wherein: the gypsum foamed door core board comprises the following raw materials in percentage by weight except water: 50-65% of semi-hydrated gypsum, 20-40% of anhydrous gypsum, 0.2-0.5% of fiber, 5-8% of calcium hydroxide, 0.1-0.3% of water reducing agent and 5-8% of foam, wherein the foam is prepared and foamed by 1 volume of foaming agent and 30-60 volumes of water.
4. A gypsum foamed door core sheet according to claim 2 or 3, wherein: the water reducing agent is a polycarboxylic acid water reducing agent, and the foaming agent is one of a plant foaming agent and an animal foaming agent.
5. The method for preparing a gypsum foam door core board according to claim 4, wherein the method comprises the following steps: the method comprises the following specific steps:
1) and (3) dry powder proportioning: mixing the semi-hydrated gypsum, the anhydrous gypsum, the calcium hydroxide, the water reducing agent and the fiber according to a ratio, feeding the mixture into a dry powder stirrer, and uniformly mixing;
2) preparing a foaming liquid: mixing a foaming agent and water in proportion to obtain a foaming liquid;
3) slurry proportioning: adding the mixed dry powder into water in proportion, and uniformly mixing;
4) foaming: placing the foaming liquid in a foaming machine for foaming, and measuring the volume of the foam by using a quantitative container;
5) adding foam in proportion under the stirring state of the slurry, stirring slowly, and mixing uniformly;
6) pouring and forming: and (3) injecting the slurry into a mold, pouring, molding and naturally curing for 3 hours.
6. The method for preparing a gypsum foam door core board according to claim 5, wherein the method comprises the following steps: in the step 3), the ratio of water to the dry powder is 0.3-0.5.
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| CN201911296029.8A CN110950621A (en) | 2019-12-16 | 2019-12-16 | Gypsum foamed door core board and preparation method thereof |
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| CN201911296029.8A CN110950621A (en) | 2019-12-16 | 2019-12-16 | Gypsum foamed door core board and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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| JPH02137781A (en) * | 1988-11-17 | 1990-05-28 | Chiyoda Kenzai Kogyo Kk | Light-weight gypsum board |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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