CN112028586A - Dry plastering wallboard and production method thereof - Google Patents
Dry plastering wallboard and production method thereof Download PDFInfo
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- CN112028586A CN112028586A CN202010741681.2A CN202010741681A CN112028586A CN 112028586 A CN112028586 A CN 112028586A CN 202010741681 A CN202010741681 A CN 202010741681A CN 112028586 A CN112028586 A CN 112028586A
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- dry
- powder
- wallboard
- gypsum
- stone powder
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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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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
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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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/0037—Materials containing oriented fillers or elements
- C04B2111/00379—Materials containing oriented fillers or elements the oriented elements being fibres
-
- 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
- C04B2111/29—Frost-thaw resistance
-
- 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 dry plastering wallboard, which is prepared from the following materials in percentage by weight: gypsum powder: 25 to 40%; stone powder: 55 to 70 percent; sodium carbonate: 2.4 percent; aluminum silicate: 2.4 percent; and a trace amount of anti-crack fibers and a retarder, wherein a mortar core material is prepared from the materials, and the dry-plastered wallboard is prepared after mixing, stirring, hardening and cutting. The dry plastering wallboard is characterized in that sodium carbonate and aluminum silicate are added into a raw material formula, the anhydrous gypsum in gypsum powder is converted into semi-hydrated gypsum during mixing and stirring, and the sodium carbonate and the aluminum silicate are used for improving the crystal form of the semi-hydrated gypsum during the conversion of the anhydrous gypsum into the semi-hydrated gypsum so that the semi-hydrated gypsum has higher frost resistance and fracture resistance when being subjected to water absorption and hardening. In the process, retarder and anti-cracking fiber are added to further improve the anti-breaking performance of the wallboard.
Description
Technical Field
The invention relates to the technical field of building material production, in particular to a dry plastering wallboard and a production method thereof.
Background
Buildings are necessary places for people to live and work, and houses and various buildings are one of important components of human society.
Existing buildings all have exterior walls, interior walls, and partition walls. In the process of construction, the dry plastering wallboard is a material widely applied to buildings, is mainly applied to bearing members of houses, partitions of houses and decoration of houses, enables the houses to be more attractive, and is simple and convenient to install. The main raw materials of the existing dry-plastering wallboard are generally made of nano-fiber, natural log, natural marble powder and the like, and are combined with other additives.
Because the dry plastering wallboard made of the materials has poor freezing resistance and folding resistance, certain potential safety hazard exists in the using process.
Disclosure of Invention
Based on the above, the invention aims to provide a dry plastering wallboard and a production method thereof, so as to solve the problem of certain potential safety hazard caused by poor freezing resistance and folding resistance of the dry plastering wallboard in the prior art.
A dry plastering wallboard is prepared from the following materials in percentage by weight:
gypsum powder: 25 to 40%;
stone powder: 55 to 70 percent;
sodium carbonate: 2.4 percent;
aluminum silicate: 2.4 percent;
and trace amounts of anti-crack fibers and a retarder;
the dry plastering wallboard is prepared by preparing a mortar core material according to the materials, mixing, stirring, hardening and cutting.
Preferably, the 0.085mm fraction content is 92 to 95 percent, and the content of the effective calcium oxide is 50 to 55 percent.
Preferably, the retarder is one or a mixture of citric acid, phosphate and tartaric acid.
Another object of the present invention is to propose a method for producing dry-plastered wallboards, for preparing the above-mentioned dry-plastered wallboards, comprising the steps of:
step (1): crushing the stone powder, and screening fine stone powder with the particle size of less than 3 millimeters;
step (2): drying the screened fine stone powder, doping the dried fine stone powder into the gypsum powder, and mixing and uniformly stirring the fine stone powder and the gypsum powder to form a dry powder material;
and (3): conveying the dry powder to a receiving and stirring system through a feeding system, doping the anti-crack fibers, the retarder, the sodium carbonate, the aluminum silicate and the water into the dry powder, and mixing and stirring uniformly to form a mortar core material;
and (4): laying non-woven fabrics on the bottom surface of the mortar core material, laying gridding cloth on the front surface of the mortar core material, and extruding, discharging, collecting and polishing the gridding cloth through a forming system;
and (5): and solidifying and hardening the mortar core material through a drying system, and cutting the mortar core material through a cutting system to obtain the dry-plastering wallboard.
Preferably, in the step (1), the stone powder is ground on a pulverizer, and fine stone powder with a particle size of less than 3 mm is screened out by a screening machine.
Preferably, in the step (2), the temperature for drying the fine stone powder is 150 to 200 ℃, and the dried fine stone powder and the gypsum powder are uniformly stirred.
Preferably, in the step (3), the dry powder is added into water and uniformly stirred to form a liquid material, the anti-crack fibers and the retarder are added into the liquid material and uniformly stirred, and then the sodium carbonate and the aluminum silicate are added and mixed for 1 to 2 minutes.
Preferably, in the step (5), the cutting system cuts the mortar core material to a standard size of 1200x600x8 mm.
Preferably, the non-woven fabric is one of a spun-bonded non-woven fabric, a needle-punched non-woven fabric and a heat-sealed non-woven fabric.
The invention has the beneficial effects that: by adding a small amount of sodium carbonate and aluminum silicate into the raw material formula, the sodium carbonate can better enhance the freezing resistance of the dry plastering wallboard, and the aluminum silicate can better enhance the folding resistance of the dry plastering wallboard. When the dry-plastering wallboard is mixed and stirred in a reaction cabin, the trihydrate gypsum in the gypsum powder is converted into the semi-hydrated gypsum, and the sodium carbonate and the aluminum silicate have the effect of improving the crystal form of the semi-hydrated gypsum in the process of converting the trihydrate gypsum into the semi-hydrated gypsum so that the semi-hydrated gypsum has higher frost resistance and folding resistance when being subjected to water absorption and hardening. In the process, retarder and anti-cracking fiber are added to further improve the anti-breaking performance of the wallboard.
The stone powder in the raw material formula adopts waste residue stone powder or industrial solid waste residue powder produced by mining and sand making, and the gypsum powder in the raw material formula adopts industrial production building gypsum powder. According to the invention, a large amount of industrial solid waste, slag, building garbage sand making powder and the like are used in the raw material formula, so that a new waste utilization way with a larger usage amount is provided for comprehensive utilization of resources, and resource saving, energy conservation and emission reduction are realized.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic flow chart of a production method of a dry-plastering wallboard provided by the invention.
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a schematic flow chart of the method for producing dry-plastered wallboard according to the present invention is shown.
In the first embodiment, the dry plastering wallboard is made of the following materials in percentage by weight:
gypsum powder: 25 percent; stone powder: 70 percent; sodium carbonate: 2.4 percent; aluminum silicate: 2.4 percent; and a trace amount of anti-crack fibers and a retarder, wherein a mortar core material is prepared from the materials, and the dry-plastered wallboard is prepared after mixing, stirring, hardening and cutting.
In this example, the 0.085mm fraction content is 92%, and the content of available calcium oxide is 50%. The retarder adopts citric acid. Another object of this embodiment is to propose a method for producing dry-plastered wallboards, for preparing the above-mentioned dry-plastered wallboards, comprising the steps of:
step (1): crushing the stone powder, and screening fine stone powder with the particle size of less than 3 millimeters;
step (2): drying the screened fine stone powder, doping the dried fine stone powder into the gypsum powder, and mixing and uniformly stirring the fine stone powder and the gypsum powder to form a dry powder material;
and (3): conveying the dry powder to a receiving and stirring system through a feeding system, mixing the anti-crack fibers, the retarder, the sodium carbonate, the aluminum silicate and the water into the dry powder, and mixing and stirring uniformly to form a mortar core material;
and (4): paving non-woven fabrics on the bottom surface of the mortar core material obtained in the step (3), paving grid cloth on the front surface, and extruding, discharging, collecting and polishing the grid cloth through a forming system;
and (5): and (4) solidifying and hardening the mortar core material obtained in the step (4) through a drying system, cutting the mortar core material through a cutting system, and cutting to a specified size to obtain the dry plastering wallboard.
In this embodiment, in the step (1), the stone powder is ground on a pulverizer, and then fine stone powder with a particle size of less than 3 mm is screened out by a screening machine. In the step (2), the fine stone powder is dried in a dryer, the temperature for drying the fine stone powder in the dryer is 150 ℃, and the dried fine stone powder and the gypsum powder are uniformly stirred in a stirrer. In the step (3), the dry powder is added into water and uniformly stirred to form a liquid material, the anti-crack fibers and the retarder are added into the liquid material and uniformly stirred, and then the sodium carbonate and the aluminum silicate are added and mixed for 2 minutes to obtain the mortar core material.
In the embodiment, the main functions of mixing and stirring the mortar core material are to provide a reaction site and a reaction time for the gypsum powder, the trihydrate gypsum in the gypsum powder is converted into the hemihydrate gypsum in the reaction chamber, and the added sodium carbonate and aluminum silicate are used for improving the crystal form of the hemihydrate gypsum in the process of converting the trihydrate gypsum into the hemihydrate gypsum so that the hemihydrate gypsum hemihydrate has higher frost resistance and fracture resistance when being subjected to water re-absorption and hardening. In the process, retarder and anti-cracking fiber are added to further improve the anti-breaking performance of the wallboard. And finally, hardening and cutting the mortar core material to obtain the dry plastering wallboard. In this embodiment, the non-woven fabric is a spun-bonded non-woven fabric, which is more favorable for laying a mortar core material. In the step (5), the cutting system cuts the mortar core material to a standard size of 1200x600x8 mm.
Second embodiment: the dry plastering wallboard is prepared from the following materials in percentage by weight:
gypsum powder: 40 percent; stone powder: 55 percent; sodium carbonate: 2.4 percent; aluminum silicate: 2.4 percent; and a trace amount of anti-crack fibers and a retarder, wherein a mortar core material is prepared from the materials, and the dry-plastered wallboard is prepared after mixing, stirring, hardening and cutting.
In this example, the 0.085mm fraction content is 95%, and the content of available calcium oxide is 70%. The retarder is phosphate. Another object of this embodiment is to propose a method for producing dry-plastered wallboards, for preparing the above-mentioned dry-plastered wallboards, comprising the steps of:
step (1): crushing the stone powder, and screening fine stone powder with the particle size of less than 3 millimeters;
step (2): drying the screened fine stone powder, doping the dried fine stone powder into the gypsum powder, and mixing and uniformly stirring the fine stone powder and the gypsum powder to form a dry powder material;
and (3): conveying the dry powder to a receiving and stirring system through a feeding system, mixing the anti-crack fibers, the retarder, the sodium carbonate, the aluminum silicate and the water into the dry powder, and mixing and stirring uniformly to form a mortar core material;
and (4): paving non-woven fabrics on the bottom surface of the mortar core material obtained in the step (3), paving grid cloth on the front surface, and extruding, discharging, collecting and polishing the grid cloth through a forming system;
and (5): and (4) solidifying and hardening the mortar core material obtained in the step (4) through a drying system, cutting the mortar core material through a cutting system, and cutting to a specified size to obtain the dry plastering wallboard.
In this embodiment, in the step (1), the stone powder is ground on a pulverizer, and then fine stone powder with a particle size of less than 3 mm is screened out by a screening machine. In the step (2), the fine stone powder is dried in a dryer, the temperature for drying the fine stone powder in the dryer is 200 ℃, and the dried fine stone powder and the gypsum powder are uniformly stirred in a stirrer. In the step (3), the dry powder is added into water and uniformly stirred to form a liquid material, then the anti-crack fibers and the retarder are added into the liquid material and uniformly stirred, and finally the sodium carbonate and the aluminum silicate are added and mixed for 1 minute to obtain the mortar core material.
In the embodiment, the main functions of mixing and stirring the mortar core material are to provide a reaction site and a reaction time for gypsum powder, trihydrate gypsum in the gypsum powder is converted into hemihydrate gypsum in a reaction chamber, and the added sodium carbonate and aluminum silicate are used for improving the crystal form of the hemihydrate gypsum in the process of converting the trihydrate gypsum into the hemihydrate gypsum so that the hemihydrate gypsum hemihydrate has higher frost resistance and fracture resistance when being subjected to water re-absorption and hardening. In the process, retarder and anti-cracking fiber are added to further improve the anti-breaking performance of the wallboard. And finally, hardening and cutting the mortar core material to obtain the dry plastering wallboard. In this embodiment, the non-woven fabric is a needle-punched non-woven fabric, and is conveniently laid on the mortar core material. In the step (5), the cutting system cuts the mortar core material to a standard size of 1200x600x8 mm.
The third embodiment: the dry plastering wallboard is prepared from the following materials in percentage by weight:
gypsum powder: 30 percent; stone powder: 65 percent; sodium carbonate: 2.4 percent; aluminum silicate: 2.4 percent; and a trace amount of anti-crack fibers and a retarder, wherein a mortar core material is prepared from the materials, and the dry-plastered wallboard is prepared after mixing, stirring, hardening and cutting.
In this example, the 0.085mm fraction content is 93%, and the content of available calcium oxide is 52%. The retarder is tartaric acid. Another object of this embodiment is to propose a method for producing dry-plastered wallboards, for preparing the above-mentioned dry-plastered wallboards, comprising the steps of:
step (1): crushing the stone powder, and screening fine stone powder with the particle size of less than 3 millimeters;
step (2): drying the screened fine stone powder, doping the dried fine stone powder into the gypsum powder, and mixing and uniformly stirring the fine stone powder and the gypsum powder to form a dry powder material;
and (3): conveying the dry powder to a receiving and stirring system through a feeding system, mixing the anti-crack fibers, the retarder, the sodium carbonate, the aluminum silicate and the water into the dry powder, and mixing and stirring uniformly to form a mortar core material;
and (4): paving non-woven fabrics on the bottom surface of the mortar core material obtained in the step (3), paving grid cloth on the front surface, and extruding, discharging, collecting and polishing the grid cloth through a forming system;
and (5): and (4) solidifying and hardening the mortar core material obtained in the step (4) through a drying system, cutting the mortar core material through a cutting system, and cutting to a specified size to obtain the dry plastering wallboard.
In this embodiment, in the step (1), the stone powder is ground on a pulverizer, and then fine stone powder with a particle size of less than 3 mm is screened out by a screening machine. In the step (2), the fine stone powder is dried in a dryer, the temperature for drying the fine stone powder in the dryer is 170 ℃, and the dried fine stone powder and the gypsum powder are uniformly stirred in a stirrer. In the step (3), the dry powder is added into water and uniformly stirred to form a liquid material, then the anti-crack fibers and the retarder are added into the liquid material and uniformly stirred, and finally the sodium carbonate and the aluminum silicate are added and mixed for 1.5 minutes to obtain the mortar core material.
In the embodiment, the main functions of mixing and stirring the mortar core material are to provide a reaction site and a reaction time for gypsum powder, trihydrate gypsum in the gypsum powder is converted into hemihydrate gypsum in a reaction chamber, and the added sodium carbonate and aluminum silicate are used for improving the crystal form of the hemihydrate gypsum in the process of converting the trihydrate gypsum into the hemihydrate gypsum so that the hemihydrate gypsum hemihydrate has higher frost resistance and fracture resistance when being subjected to water re-absorption and hardening. In the process, retarder and anti-cracking fiber are added to further improve the anti-breaking performance of the wallboard. And finally, hardening and cutting the mortar core material to obtain the dry plastering wallboard. In this embodiment, the non-woven fabric is a heat-seal non-woven fabric, and is conveniently laid on the mortar core material. In the step (5), the cutting system cuts the mortar core material to a standard size of 1200x600x8 mm.
The fourth embodiment: the dry plastering wallboard is prepared from the following materials in percentage by weight:
gypsum powder: 35 percent; stone powder: 60 percent; sodium carbonate: 2.4 percent; aluminum silicate: 2.4 percent; and a trace amount of anti-crack fibers and a retarder, wherein a mortar core material is prepared from the materials, and the dry-plastered wallboard is prepared after mixing, stirring, hardening and cutting.
In this example, the 0.085mm fraction content is 94%, and the effective calcium oxide content is 58%. The retarder is a mixture of citric acid, phosphate and tartaric acid. Another object of this embodiment is to propose a method for producing dry-plastered wallboards, for preparing the above-mentioned dry-plastered wallboards, comprising the steps of:
step (1): crushing the stone powder, and screening fine stone powder with the particle size of less than 3 millimeters;
step (2): drying the screened fine stone powder, doping the dried fine stone powder into the gypsum powder, and mixing and uniformly stirring the fine stone powder and the gypsum powder to form a dry powder material;
and (3): conveying the dry powder to a receiving and stirring system through a feeding system, mixing the anti-crack fibers, the retarder, the sodium carbonate, the aluminum silicate and the water into the dry powder, and mixing and stirring uniformly to form a mortar core material;
and (4): paving non-woven fabrics on the bottom surface of the mortar core material obtained in the step (3), paving grid cloth on the front surface, and extruding, discharging, collecting and polishing the grid cloth through a forming system;
and (5): and (4) solidifying and hardening the mortar core material obtained in the step (4) through a drying system, cutting the mortar core material through a cutting system, and cutting to a specified size to obtain the dry plastering wallboard.
In this embodiment, in the step (1), the stone powder is ground on a pulverizer, and then fine stone powder with a particle size of less than 3 mm is screened out by a screening machine. In the step (2), the fine stone powder is dried in a dryer, the temperature for drying the fine stone powder in the dryer is 180 ℃, and the dried fine stone powder and the gypsum powder are uniformly stirred in a stirrer. In the step (3), the dry powder is added into water and uniformly stirred to form a liquid material, then the anti-crack fibers and the retarder are added into the liquid material and uniformly stirred, and finally the sodium carbonate and the aluminum silicate are added and mixed for 2 minutes to obtain the mortar core material.
In the embodiment, the main functions of mixing and stirring the mortar core material are to provide a reaction site and a reaction time for gypsum powder, trihydrate gypsum in the gypsum powder is converted into hemihydrate gypsum in a reaction chamber, and the added sodium carbonate and aluminum silicate are used for improving the crystal form of the hemihydrate gypsum in the process of converting the trihydrate gypsum into the hemihydrate gypsum so that the hemihydrate gypsum hemihydrate has higher frost resistance and fracture resistance when being subjected to water re-absorption and hardening. In the process, retarder and anti-cracking fiber are added to further improve the anti-breaking performance of the wallboard. And finally, hardening and cutting the mortar core material to obtain the dry plastering wallboard. In this embodiment, the non-woven fabric is a spun-bonded non-woven fabric, and is convenient to lay on the mortar core material. In the step (5), the cutting system cuts the mortar core material to a standard size of 1200x600x8 mm.
Fifth embodiment: the dry plastering wallboard is prepared from the following materials in percentage by weight:
gypsum powder: 38 percent; stone powder: 57 percent; sodium carbonate: 2.4 percent; aluminum silicate: 2.4 percent; and a trace amount of anti-crack fibers and a retarder, wherein a mortar core material is prepared from the materials, and the dry-plastered wallboard is prepared after mixing, stirring, hardening and cutting.
In this example, the 0.085mm fraction content is 95%, and the content of available calcium oxide is 55%. The retarder is citric acid. Another object of this embodiment is to propose a method for producing dry-plastered wallboards, for preparing the above-mentioned dry-plastered wallboards, comprising the steps of:
step (1): crushing the stone powder, and screening fine stone powder with the particle size of less than 3 millimeters;
step (2): drying the screened fine stone powder, doping the dried fine stone powder into the gypsum powder, and mixing and uniformly stirring the fine stone powder and the gypsum powder to form a dry powder material;
and (3): conveying the dry powder to a receiving and stirring system through a feeding system, mixing the anti-crack fibers, the retarder, the sodium carbonate, the aluminum silicate and the water into the dry powder, and mixing and stirring uniformly to form a mortar core material;
and (4): paving non-woven fabrics on the bottom surface of the mortar core material obtained in the step (3), paving grid cloth on the front surface, and extruding, discharging, collecting and polishing the grid cloth through a forming system;
and (5): and (4) solidifying and hardening the mortar core material obtained in the step (4) through a drying system, cutting the mortar core material through a cutting system, and cutting to a specified size to obtain the dry plastering wallboard.
In this embodiment, in the step (1), the stone powder is ground on a pulverizer, and then fine stone powder with a particle size of less than 3 mm is screened out by a screening machine. In the step (2), the fine stone powder is dried in a dryer, the temperature for drying the fine stone powder in the dryer is 180 ℃, and the dried fine stone powder and the gypsum powder are uniformly stirred in a stirrer. In the step (3), the dry powder is added into water and uniformly stirred to form a liquid material, then the anti-crack fibers and the retarder are added into the liquid material and uniformly stirred, and finally the sodium carbonate and the aluminum silicate are added and mixed for 1 minute to obtain the mortar core material.
In the embodiment, the main functions of mixing and stirring the mortar core material are to provide a reaction site and a reaction time for gypsum powder, trihydrate gypsum in the gypsum powder is converted into hemihydrate gypsum in a reaction chamber, and the added sodium carbonate and aluminum silicate are used for improving the crystal form of the hemihydrate gypsum in the process of converting the trihydrate gypsum into the hemihydrate gypsum so that the hemihydrate gypsum hemihydrate has higher frost resistance and fracture resistance when being subjected to water re-absorption and hardening. In the process, retarder and anti-cracking fiber are added to further improve the anti-breaking performance of the wallboard. And finally, hardening and cutting the mortar core material to obtain the dry plastering wallboard. In this embodiment, the non-woven fabrics is the heat seal non-woven fabrics, is convenient for lay on the mortar core. In the step (5), the cutting system cuts the mortar core material to a standard size of 1200x600x8 mm.
In the concrete implementation, a small amount of sodium carbonate and aluminum silicate are added into the raw material formula of the invention, the sodium carbonate can better enhance the freezing resistance of the dry plastering wallboard, and the aluminum silicate can better enhance the folding resistance of the dry plastering wallboard. When the dry-plastering wallboard is mixed and stirred in a reaction cabin, the trihydrate gypsum in the gypsum powder is converted into the semi-hydrated gypsum, and the sodium carbonate and the aluminum silicate have the effect of improving the crystal form of the semi-hydrated gypsum in the process of converting the trihydrate gypsum into the semi-hydrated gypsum so that the semi-hydrated gypsum has higher frost resistance and folding resistance when being subjected to water absorption and hardening. In the process, retarder and anti-cracking fiber are added to further improve the anti-breaking performance of the wallboard.
A plurality of samples of the dry plastering wallboard are taken for detection according to a wallboard testing method, and the detection results are shown in Table 1.
Table 1: detection result of dry plastering wallboard
From the above table 1 it is clear that the freeze resistance and the folding resistance of the dry plastered wall panels are significantly better than the prior art wall panels.
It should be noted that the above-mentioned implementation process is only for illustrating the applicability of the present application, but this does not represent that the dry-plastered wall panels and the production methods thereof of the present application have only the above-mentioned implementation processes, and on the contrary, the dry-plastered wall panels and the production methods thereof of the present application can be incorporated into the feasible embodiments of the present application as long as they can be implemented.
In summary, in the dry-plastered wallboard and the production method thereof in the above embodiments of the present invention, a small amount of sodium carbonate and aluminum silicate is added into the raw material formulation of the present invention, the sodium carbonate can better enhance the frost resistance of the dry-plastered wallboard, and the aluminum silicate can better enhance the fracture resistance of the dry-plastered wallboard. When the dry-plastering wallboard is mixed and stirred in a reaction cabin, the trihydrate gypsum in the gypsum powder is converted into the semi-hydrated gypsum, and the sodium carbonate and the aluminum silicate have the effect of improving the crystal form of the semi-hydrated gypsum in the process of converting the trihydrate gypsum into the semi-hydrated gypsum so that the semi-hydrated gypsum has higher frost resistance and folding resistance when being subjected to water absorption and hardening. In the process, retarder and anti-cracking fiber are added to further improve the anti-breaking performance of the wallboard.
The stone powder in the raw material formula adopts waste residue stone powder or industrial solid waste residue powder produced by mining and sand making, and the gypsum powder in the raw material formula adopts industrial production building gypsum powder. According to the invention, a large amount of industrial solid waste, slag, building garbage sand making powder and the like are used in the raw material formula, so that a new waste utilization way with a larger usage amount is provided for comprehensive utilization of resources, and resource saving, energy conservation and emission reduction are realized.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A dry plastering wallboard is characterized in that the following materials in percentage by weight are selected:
gypsum powder: 25 to 40%;
stone powder: 55 to 70 percent;
sodium carbonate: 2.4 percent;
aluminum silicate: 2.4 percent;
and trace amounts of anti-crack fibers and a retarder;
the dry plastering wallboard is prepared by preparing a mortar core material according to the materials, mixing, stirring, hardening and cutting.
2. A dry-plastered wallboard according to claim 1, wherein: the content of 0.085mm particle fraction in the stone powder is 92-95%, and the content of effective calcium oxide is 50-55%.
3. A dry-plastered wallboard according to claim 1, wherein: the retarder is one or a mixture of citric acid, phosphate and tartaric acid.
4. A method of producing dry-plastered wallboard, characterised in that it is used to prepare a dry-plastered wallboard according to any one of claims 1 to 3, the method of producing the dry-plastered wallboard comprising the steps of:
step (1): crushing the stone powder, and screening fine stone powder with the particle size of less than 3 millimeters;
step (2): drying the screened fine stone powder, doping the dried fine stone powder into the gypsum powder, and mixing and uniformly stirring the fine stone powder and the gypsum powder to form a dry powder material;
and (3): conveying the dry powder to a receiving and stirring system through a feeding system, doping the anti-crack fibers, the retarder, the sodium carbonate, the aluminum silicate and the water into the dry powder, and mixing and stirring uniformly to form a mortar core material;
and (4): laying non-woven fabrics on the bottom surface of the mortar core material, laying gridding cloth on the front surface of the mortar core material, and extruding, discharging, collecting and polishing the gridding cloth through a forming system;
and (5): and solidifying and hardening the mortar core material through a drying system, and cutting the mortar core material through a cutting system to obtain the dry-plastering wallboard.
5. A method of producing dry-plastered wallboard according to claim 4, characterised in that: in the step (1), the stone powder is ground on a pulverizer, and fine stone powder with the particle size of less than 3 mm is screened out by a screening machine.
6. A method of producing dry-plastered wallboard according to claim 4, characterised in that: in the step (2), the temperature for drying the fine stone powder is 150 to 200 ℃, and the dried fine stone powder and the gypsum powder are uniformly stirred.
7. A method of producing dry-plastered wallboard according to claim 4, characterised in that: in the step (3), the dry powder is added into water and uniformly stirred to form a liquid material, the anti-crack fibers and the retarder are added into the liquid material and uniformly stirred, and then the sodium carbonate and the aluminum silicate are added and mixed for 1 to 2 minutes.
8. A method of producing dry-plastered wallboard according to claim 4, characterised in that: in the step (5), the cutting system cuts the mortar core material to a standard size of 1200x600x8 mm.
9. A method of producing dry-plastered wallboard according to claim 4, characterised in that: the non-woven fabric is one of spun-bonded non-woven fabric, needle-punched non-woven fabric or heat-seal non-woven fabric.
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Application publication date: 20201204 Assignee: Lu Pingping Assignor: XINGGUO RENHE BUILDING MATERIAL Co.,Ltd. Contract record no.: X2023980042361 Denomination of invention: A dry plastered wall panel and its production method Granted publication date: 20211026 License type: Common License Record date: 20230921 |
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