CN112830755A - High-strength plastic type water-resistant gypsum decorative material and preparation method thereof - Google Patents
High-strength plastic type water-resistant gypsum decorative material and preparation method thereof Download PDFInfo
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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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- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/22—Glass ; Devitrified glass
- C04B14/24—Glass ; Devitrified glass porous, e.g. foamed glass
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- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/26—Carbonates
- C04B14/28—Carbonates of calcium
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- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
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- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
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- 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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The application relates to a gypsum decorative material, in particular to a high-strength plastic type waterproof gypsum decorative material and a preparation method thereof. The preparation raw materials of the high-strength plastic type water-resistant gypsum decorative material comprise the following components in parts by weight: 40-60 parts of high-strength gypsum, 10-30 parts of ground calcium carbonate, 5-15 parts of vitrified micro bubbles, 0.05-0.1 part of water repellent, 0.05-0.1 part of water retention thickener, 0.5-1.5 parts of hydrophobic re-dispersible emulsion powder, 0.05-0.13 part of gypsum retarder, 0.05-0.1 part of cream dispersant, 0.1-0.5 part of fumed silica and 0.1-0.2 part of hydroxypropyl methyl cellulose ether; the average grain diameter of the vitrified micro bubbles is 70-120 meshes. The high-strength plastic type waterproof gypsum decorative material provided by the application has the advantages of small shrinkage rate, adjustable construction opening time, high thixotropy, good cohesiveness, good water resistance, no bubbling, no cracking, no powder falling and high strength after being soaked in water.
Description
Technical Field
The application relates to a gypsum decorative material, in particular to a high-strength plastic type waterproof gypsum decorative material and a preparation method thereof.
Background
Gypsum is one of three world cementing materials, is an air-hardening cementing material, is a resource which is abundant and ubiquitous, has a long use history, and is smaller in use amount in the field of buildings compared with cement at present. The gypsum product is a good decorative material, and the gypsum and the product thereof have the characteristics of light weight, high strength, fire resistance, heat insulation, sound absorption, full shape, clear lines, smooth and fine surface, good decorative effect and the like, so the gypsum product is one of the decorative materials commonly used in building design, and the gypsum decorative product is mainly used for gypsum boards, artistic decorative gypsum and the like. The main characteristic of gypsum is that it does not crack, is a micro-expansive material, and can also be called "breathing" wall. The gypsum product can resist cracking without glue, has the functions of sound insulation, noise reduction, indoor environment humidity adjustment and the like, and can replace cement mortar, paint, stone and other materials. The gypsum decorative material is widely applied in the building decoration industry.
The common gypsum decorative material has too large volume weight, usually 1.3 multiplied by 103kg·m-3And the left and right sides of the building structure are weighted, the cracking phenomenon can occur after the building structure is used for a long time, and the gypsum yellowing can be caused after the building structure is used for a long time, so that the integral decorative effect of the gypsum is influenced.
At present, perlite and glass fiber are usually added into a gypsum decorative material to reduce the volume weight of the gypsum decorative material, but the perlite and the glass fiber have poor toughness and are difficult to disperse uniformly, so that the gypsum is easy to shrink or expand to have inconsistent stress, the molding function of the gypsum decorative material is reduced, various shapes such as a drawing, a relief, an embossing and the like are difficult to mold, the strength of the gypsum decorative material is also reduced, and particularly the strength after drying is lower.
Disclosure of Invention
In order to solve the problem that the shrinkage or expansion stress of the gypsum decorative material is inconsistent, the application provides a high-strength plastic type waterproof gypsum decorative material and a preparation method thereof.
In a first aspect, the application provides a high-strength plastic type waterproof gypsum decorative material, which is realized by adopting the following technical scheme:
a high-strength plastic type water-resistant gypsum decorative material comprises the following preparation raw materials in parts by weight: 40-60 parts of high-strength gypsum, 10-30 parts of ground calcium carbonate, 5-15 parts of vitrified micro bubbles, 0.05-0.1 part of water repellent, 0.05-0.1 part of water retention thickener, 0.5-1.5 parts of hydrophobic re-dispersible emulsion powder, 0.05-0.13 part of gypsum retarder, 0.05-0.1 part of cream dispersant, 0.1-0.5 part of fumed silica and 0.1-0.2 part of hydroxypropyl methyl cellulose ether; the average grain diameter of the vitrified micro bubbles is 70-120 meshes.
Through adopting above-mentioned technical scheme, this application adopts heavy calcium carbonate and the great vitrified micro bubble of mesh number to replace pearlite and glass fiber, can improve the inconsistent problem of gypsum ornamental material shrink or expansion stress, has improved the rupture strength and the compressive strength of gypsum ornamental material. The fumed silica has the functions of anti-caking and anti-settling, the dispersibility of the system is improved, and the thixotropic property of the fumed silica improves the strength of the gypsum decorative material. The high-strength gypsum has thicker crystal grains and smaller specific surface area, and the prepared gypsum slurry has small plastic water demand, so that the hardened gypsum slurry has small porosity and higher strength and compactness; the hydrophobic re-dispersible latex powder is dispersed to form a film, and the film-forming polymer resin is used as a reinforcing material to be distributed in the whole slurry system, so that the cohesion of the slurry is increased, and the hydrophobic re-dispersible latex powder can improve the tensile strength, increase the bending strength and reduce the elastic modulus after the slurry is dried. The water repellent solves the fundamental problem of external wall leakage, makes the gaps between mortar and concrete compact, improves the compressive strength and tensile strength, forms a permanent waterproof film on the surface of the building, ensures that the bonding part of the heat-insulating board and the wall surface does not expand, deform or fall off, and can effectively prolong the service life of the building. The components act together, so that the prepared high-strength plastic type waterproof gypsum decorative material has the advantages of small shrinkage rate, adjustable construction opening time, high thixotropy, good cohesiveness, good water resistance, no foaming, no cracking, no powder falling after soaking in water and high strength.
Preferably, the high-strength gypsum is alpha-high-strength gypsum.
By adopting the technical scheme, the alpha-high-strength gypsum adopted by the application has high strength, strong impact resistance and low water absorption, and the breaking strength and the compressive strength of the high-strength plastic type water-resistant gypsum decorative material are obviously improved.
Preferably, the D50 particle size of the heavy calcium carbonate is 1-1.5 μm; more preferably, the heavy calcium carbonate has a D50 particle size of 1.3 μm.
By adopting the technical scheme, the heavy calcium carbonate has irregular shape, different particle sizes, different surface roughness and different edge angle conditions, and the heavy calcium carbonate with smaller particle size has better dispersity, but has larger sedimentation volume, can influence the micro-expansion property of the high-strength gypsum and reduce the breaking strength and the compressive strength of the high-strength plastic type waterproof gypsum decorative material.
Preferably, the water repellent is prepared from sodium methylsiliconate and a redispersible silane-based water repellent according to a mass ratio of 1: (1.2-1.8) mixing; more preferably, the water repellent is formed by mixing sodium methyl silanol and a redispersible silane-based water repellent according to the mass ratio of 1: 1.5.
By adopting the technical scheme, the sodium methyl silanol is dried under the action of water and carbon dioxide to generate a net-shaped organic silicon resin film with a body structure on the surface layer; the redispersible silyl water repellent SEAL80 takes polyvinyl alcohol as a protective colloid, and has high activity, strong fluidity and good redispersibility; the sodium methylsiliconate and the redispersible silyl water repellent SEAL80 are compounded and the mass ratio of the two is controlled, so that not only can the excellent hydrophobic effect be realized, the water resistance is strong, and the powder falling phenomenon is avoided, but also the redispersible silyl water repellent SEAL80 and the water retention thickening agent, the hydrophobic redispersible latex powder, the hydroxypropyl methyl cellulose ether and other components act together, the dispersibility of the system is improved, the breaking strength and the compressive strength of the high-strength plastic water-resistant gypsum decorative material are improved, the water retention rate and the thickening value are improved to a certain extent, and the natural drying shrinkage value is also reduced to a certain extent.
Preferably, the water-retaining thickener is a cross-linked emulsion formed by copolymerizing polyacrylate and methacrylic acid.
By adopting the technical scheme, the crosslinked emulsion formed by copolymerizing the polyacrylate and the methacrylic acid can improve the fluidity of the system after thickening, has better dispersibility on the heavy calcium carbonate and the vitrified micro bubbles and better water resistance, thereby improving the breaking strength and the compressive strength of the high-strength plastic type water-resistant gypsum decorative material.
Preferably, the fumed silica is a hydrophobic fumed silica.
By adopting the technical scheme, the hydrophobic fumed silica cannot be wetted by water, the absorbed water content is obviously reduced, the hydrophobic fumed silica, the hydrophobic redispersible latex powder and the water repellent act together, the rheological property of a system can be improved, and the dispersibility is better.
Preferably, the hydrophobic fumed silica has a specific surface area of 90 to 180m2(ii)/g; more preferably, the hydrophobic fumed silica has a specific surface area of 90 to 130m2/g。
Through adopting above-mentioned technical scheme, this application control hydrophobic type fumed silica's specific surface area can adjust the thickening and the thixotropic effect of system, and increase hydrophobic type fumed silica's specific surface area to a certain extent is favorable to improving thickening and thixotropic effect, improves the mobility and the dispersibility of system, but specific surface area is too big, can reduce the plasticity of the water-fast gypsum ornamental material of high strength plastic type, and water-retaining rate obviously reduces, and natural drying shrinkage value also obviously improves.
Preferably, the hydroxypropyl methylcellulose ether is selected from one or more of LH55RR, HK40000, M4025; more preferably, the hydroxypropyl methylcellulose ether is LH55 RR.
By adopting the technical scheme, the different types of hydroxypropyl methyl cellulose ether are adopted, wherein the viscosity of HK750000S is high, the viscosity of LH55RR is moderate and is dispersed at an excessive speed, the viscosities of HK40000 and M4025 are low, but M4025 is easy to process, and LH55RR is relatively excellent in consideration of the influence of the different types of hydroxypropyl methyl cellulose ether on the comprehensive performance of the high-strength plastic type water-resistant gypsum decorative material.
Preferably, the raw materials for preparing the high-strength plastic-type water-resistant gypsum decorative material also comprise 0.5-1 part by weight of magnesium aluminum silicate.
By adopting the technical scheme, the magnesium aluminum silicate has a unique three-dimensional chain structure and a special needle-like and bar-like crystal structure, the high-strength plastic type water-resistant gypsum decorative material can form an associated network structure when contacting water due to the addition of the magnesium aluminum silicate, the flexural strength, the compressive strength and the consistency value are obviously improved, the natural drying shrinkage value is obviously reduced, the magnesium aluminum silicate and other components act together, the bonding force between the high-strength plastic type water-resistant gypsum decorative material and a test board is improved, and the water resistance is further improved without foaming and cracking.
In a second aspect, the application provides a preparation method of a high-strength plastic type waterproof gypsum decorative material, which adopts the following technical scheme:
a preparation method of a high-strength plastic type water-resistant gypsum decorative material comprises the following steps:
mixing high-strength gypsum, heavy calcium carbonate, vitrified micro bubbles, fumed silica and magnesium aluminum silicate, and uniformly stirring to obtain a first mixture;
adding hydrophobic re-dispersible latex powder, a cream dispersant, hydroxypropyl methyl cellulose ether, a water repellent, a water retention thickener and a gypsum retarder into the first mixture, and uniformly mixing to obtain the high-strength plastic water-resistant gypsum decorative material.
By adopting the technical scheme, the preparation process is simple, the high-strength gypsum, the ground limestone, the vitrified micro bubbles, the fumed silica and the magnesium aluminum silicate are mixed in advance, the distribution of the inorganic components is more uniform, and the problem of inconsistent shrinkage or expansion stress of the gypsum decorative material is favorably solved.
In summary, the present application has the following beneficial effects:
1. this application adopts heavy calcium carbonate and the great vitrified micro bubble of mesh number to replace pearlite and glass fiber, can improve the inconsistent problem of gypsum ornamental material shrink or expansion stress, has improved gypsum ornamental material's rupture strength and compressive strength. The components act together, so that the prepared high-strength plastic type waterproof gypsum decorative material has the advantages of small shrinkage rate, adjustable construction opening time, high thixotropy, good cohesiveness, good water resistance, no foaming, no cracking, no powder falling after soaking in water and high strength.
2. The too big and undersize of the particle size of this application ground limestone is unfavorable for improving flexural strength and compressive strength, and when D50 particle size was 1.3 mu m, not only flexural strength and compressive strength were better, and the water-retaining rate thickness value has certain improvement, and natural drying shrinkage value also has certain reduction.
3. According to the water-resistant gypsum decorating material, the sodium methylsiliconate and the redispersible silane-based water repellent are compounded, the mass ratio of the sodium methylsiliconate to the redispersible silane-based water repellent is controlled, the excellent water-resistant effect can be realized, the water resistance is high, the powder falling phenomenon is avoided, the dispersibility of the system is improved, the breaking strength and the compressive strength of the high-strength plastic water-resistant gypsum decorating material are improved, the water retention rate and the consistency value are improved to a certain extent, and the natural drying shrinkage value is reduced to a certain extent.
4. The magnesium aluminum silicate is added, so that the flexural strength, the compressive strength and the consistency value can be improved, the natural drying shrinkage value is obviously reduced, the magnesium aluminum silicate and other components act together, the binding force between the high-strength plastic type water-resistant gypsum decorative material and the test board is improved, and the water resistance is further improved.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials used in the present application are commercially available, and unless otherwise specified, the raw materials used in the respective preparation examples, examples and comparative examples of the present application are derived from table 1 below, and the raw materials not mentioned in table 1 below are all purchased from pharmaceutical company chemical agents ltd.
TABLE 1
Examples
Examples 1 to 21 provide a high strength plastic type water resistant gypsum decorative material, and the following description will be made by taking example 1 as an example.
The high-strength plastic water-resistant gypsum decorative material provided by the embodiment 1 comprises the following preparation steps:
mixing 40g of beta-high-strength gypsum, 10g of ground calcium carbonate, 5g of vitrified micro bubbles, 0.1g of fumed silica and 0.5g of magnesium aluminum silicate, and uniformly stirring to obtain a first mixture;
adding 0.5g of hydrophobic re-dispersible latex powder, 0.05g of cream dispersant, 0.1g of hydroxypropyl methyl cellulose ether, 0.05g of hydrophobic agent, 0.05g of water retention thickener and 0.05g of gypsum retarder into the first mixture, and uniformly mixing to obtain the high-strength plastic water-resistant gypsum decorative material;
wherein the model of the beta-high-strength gypsum is DLJ-03;
the heavy calcium carbonate is JS-1250(D50 grain diameter is 2 μm);
the average grain diameter of the vitrified micro bubbles is 80 meshes;
the fumed silica is WACKER
V15 (specific surface area 150 m)2/g)；
The hydrophobic re-dispersible latex powder has the mark of
RE 5044N；
The model of the hydroxypropyl methyl cellulose ether is HK 750000S;
the water repellent is sodium methyl siliconate with the model of RQ 301;
the water-retaining thickener is carboxymethyl cellulose with the model of HX-2221;
the model of the gypsum retarder is HSG-1.
Examples 2-5, like example 1, differ only in that: the high-strength plastic type waterproof gypsum decorative material is different in quality of the raw materials, and is shown in table 2.
TABLE 2
| Components | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Beta-high strength gypsum | 40g | 60g | 50g | 50g | 50g |
| Ground calcium carbonate | 10g | 30g | 20g | 20g | 20g |
| Vitrified micro bubbles | 5g | 15g | 10g | 10g | 10g |
| Fumed silica | 0.1g | 0.5g | 0.3g | 0.3g | 0.3g |
| Magnesium aluminum silicate | 0.5g | 1g | 0.8g | 0g | 0.8g |
| Hydrophobic re-dispersible latex powder | 0.5g | 1.5g | 1g | 1g | 1g |
| Cream dispersing agent | 0.05g | 0.1g | 0.08g | 0.08g | 0.08g |
| Hydroxypropyl methyl cellulose ether | 0.1g | 0.2g | 0.15g | 0.15g | 0.1g |
| Water repellent | 0.05g | 0.1g | 0.08g | 0.08g | 0.08g |
| Water-retaining thickening agent | 0.05g | 0.1g | 0.08g | 0.08g | 0.05g |
| Gypsum retarder | 0.05g | 0.13g | 0.09g | 0.09g | 0.09g |
Example 6, like example 3, differs only in that: the hydrophobic re-dispersible latex powder is prepared from
Replacement of RE 5044N with
8031H。
Example 7, like example 6, differs only in that: the model of the gypsum retarder is replaced by FYOK-101A from HSG-1.
Example 8, like example 7, differs only in that: the beta-high-strength gypsum is replaced by alpha-high-strength gypsum, and the model of the alpha-high-strength gypsum is DLJ-01.
Examples 9-11, like example 8, differ only in that: the heavy calcium carbonate is different and is shown in table 3.
TABLE 3
Examples 12-15, like example 11, differ only in that: the water repellents are different and are shown in Table 4.
TABLE 4
Example 16, like example 15, differs only in that: the water-retaining thickener is a cross-linked emulsion HT-925 formed by copolymerization of polyacrylate and methacrylic acid and replacing carboxypropyl methyl cellulose HX-2221 with the hydroxypropyl methyl cellulose HX-2221.
Examples 17-18, like example 16, differ only in that: the fumed silicas differ, as shown in Table 5.
TABLE 5
Examples 19-21, like example 18, differ only in that: the hydroxypropyl methylcellulose ethers are different and are specifically shown in table 6.
TABLE 6
| Examples | Example 18 | Example 19 | Example 20 | Example 21 |
| Hydroxypropyl methyl cellulose ether | HK750000S | LH55RR | HK40000 | M4025 |
Comparative example
Comparative example 1, like example 4, differs only in that: the cream dispersing agent was replaced with BYK-W966 dispersing agent.
Comparative example 2, like example 4, differs only in that: the average grain diameter of the vitrified micro bubbles is changed from 80 meshes to 40 meshes.
Comparative example 3, like example 4, differs only in that: the ground calcium carbonate is replaced by glass fiber (refined glass fiber powder is 100 meshes), and the vitrified micro bubbles are replaced by perlite (model B1025).
Comparative example 4, like example 4, differs only in that: the fumed silica had a mass of 0 g.
Performance test
The following performance tests were performed on the high-strength, plastic and water-resistant gypsum decorative materials provided in examples 1 to 21 and comparative examples 1 to 4 of the present application.
1. Breaking strength: the high strength, plastic and water resistant gypsum decorative materials provided in examples 1-21 and comparative examples 1-4 were tested for flexural strength according to the GB/T17669.3-1999 standards, and the test results are shown in Table 7.
2. Compressive strength: the high strength, plastic and water resistant gypsum decorating materials provided in examples 1 to 21 and comparative examples 1 to 4 were tested for compressive strength according to the GB/T17669.3-1999 standard, and the test results are shown in Table 7.
3. Water retention: the water retentions of the high strength, plastic, water-resistant gypsum-decorating materials provided in examples 1 to 21 and comparative examples 1 to 4 were tested according to the GB/T17669.3-1999 standards, and the test results are shown in Table 7.
4. Consistency value: 40g of the high-strength and plastic-type water-resistant gypsum decorative materials provided in examples 1 to 21 and comparative examples 1 to 4 were mixed with 60g of tap water to obtain slurries, and the consistency values of the slurries corresponding to the high-strength and plastic-type water-resistant gypsum decorative materials provided in examples 1 to 21 and comparative examples 1 to 4 were tested according to the JG/T70-2009 standard, and the test results are shown in Table 7.
5. Natural drying shrinkage value: 40g of the high-strength and plastic-type water-resistant gypsum decorative materials provided in examples 1 to 21 and comparative examples 1 to 4 were mixed with 60g of tap water to obtain slurries, and the natural drying shrinkage values of the slurries corresponding to the high-strength and plastic-type water-resistant gypsum decorative materials provided in examples 1 to 21 and comparative examples 1 to 4 were tested according to the JG/T70-2009 standard, and the test results are shown in Table 7.
TABLE 7
6. Water resistance: 40g of the high-strength molding type water-resistant gypsum decorating materials provided by examples 1-21 and comparative examples 1-4 and 60g of tap water are respectively mixed, the high-strength molding type water-resistant gypsum decorating materials provided by examples 1-21 and comparative examples 1-4 are subjected to plate making according to the JC/T298-2010 standard (the base material is an asbestos-free fiber cement flat plate, the size of the test plate is 150mm multiplied by 70mm multiplied by 5mm, the wet film thickness is 1mm, the test plate curing period is 7d), the plates corresponding to the high-strength molding type water-resistant gypsum decorating materials provided by examples 1-21 and comparative examples 1-4 are soaked in the three-stage water specified by GB/T6682 according to the GB/T1733 specification, the plates are taken out and observed to have the foaming and the cracking, are dried for 24 hours under the GB/T9278 condition, the powder falling is observed by finger light scraping, the test results are shown in Table 8.
TABLE 8
The present application is described in detail below with reference to the test data provided in tables 7 and 8.
From the examples 1-5, the addition amount of the preparation raw materials affects the comprehensive performance of the high-strength plastic-type water-resistant gypsum decorative material, wherein the difference between the example 3 and the example 4 is only whether magnesium aluminum silicate exists or not, and the experimental data in the tables 7 and 8 show that the addition of the magnesium aluminum silicate can obviously improve the flexural strength, the compressive strength, the consistency value and the water resistance and obviously reduce the natural drying shrinkage value; the difference between the example 3 and the example 5 is only that the quality of the hydroxypropyl methyl cellulose ether and the water retention thickening agent is different, and the example 3 increases the quality of the hydroxypropyl methyl cellulose ether and the water retention thickening agent, so that the water retention rate and the thickening value are obviously improved, and the natural drying shrinkage value is also obviously reduced.
From the examples 3 and 6, the water retention rate of the high-strength plastic type waterproof gypsum decorating material is mainly influenced by the type of the hydrophobic re-dispersible latex powder,
8031H and
compared with the RE 5044N,
8031H has better flexibility, higher thixotropy, lower resilience, adjustable construction opening time and better plasticity, reduces the natural drying shrinkage value, and improves the water retention rate and the consistency value.
Compared with the examples 7 and 8, the high-strength gypsum has larger influence on the flexural strength and the compressive strength of the high-strength plastic type water-resistant gypsum decorative material, wherein the effect of the alpha-high-strength gypsum is obviously better than that of the beta-high-strength gypsum.
From the examples 8 to 11, it can be seen that the particle size of the ground limestone has a large influence on the flexural strength and the compressive strength of the high-strength plastic-type water-resistant gypsum decorative material, wherein the flexural strength and the compressive strength are increased and then decreased with the decrease of the particle size, the flexural strength and the compressive strength are peak values when the particle size of D50 is 1.3 μm, the water retention rate and the consistency value are improved to a certain extent, and the natural drying shrinkage value is also reduced to a certain extent.
From the examples 11 to 15, the water repellent has a large influence on the water resistance of the high-strength plastic water-resistant gypsum decorative material, and the sodium methyl silanol and the redispersible silyl water repellent SEAL80 are compounded to serve as the water repellent, the mass ratio of the water repellent to the water repellent is controlled, so that the excellent water repellent effect can be realized, namely, the water resistance is high, the powder falling phenomenon is avoided, the dispersibility of the system is improved, the breaking strength and the compressive strength of the high-strength plastic water-resistant gypsum decorative material are improved, the water retention rate and the consistency value are improved to a certain extent, and the natural drying shrinkage value is also reduced to a certain extent.
From examples 15 and 16 of the present application, it is known that, in the crosslinked emulsion obtained by copolymerizing polyacrylate and methacrylic acid, the viscosity value of the crosslinked emulsion obtained by copolymerizing polyacrylate and methacrylic acid is slightly decreased, the water retention rate is not decreased but slightly increased, the natural drying shrinkage value is not increased but slightly decreased, and the dispersibility of the crosslinked emulsion obtained by copolymerizing polyacrylate and methacrylic acid after thickening can be improved, thereby improving the flexural strength and compressive strength.
It is understood from examples 16 to 18 of the present application that the hydrophobic fumed silica is not wetted with water, and the specific surface area of the hydrophobic fumed silica is increased to some extent. The rheological property of the system can be improved, the dispersibility is better, the breaking strength and the compressive strength of the high-strength plastic type water-resistant gypsum decorative material are improved, but the specific surface area is overlarge, the plasticity of the high-strength plastic type water-resistant gypsum decorative material is reduced, the water retention rate and the consistency value are reduced, and the natural drying shrinkage value is also improved.
From examples 18 to 21 of the present application, four different types of hydroxypropyl methylcellulose ethers are known, of which HK750000S has a high viscosity, LH55RR has a moderate viscosity and is ultra-fast dispersing, and HK40000 and M4025 have low viscosities, but M4025 is easy to process. Comprehensively considering, the LH55RR corresponding high-strength plastic water-resistant gypsum decorative material has better comprehensive performance.
From the example 4 and the comparative example 1, the cream dispersing agent is adopted for lubrication, so that the construction performance of the high-strength plastic type water-resistant gypsum decorative material is greatly improved, the powder falling and cracking degrees of the high-strength plastic type water-resistant gypsum decorative material are reduced, and no foaming is caused; the cream dispersing agent improves the dispersibility of the system and improves the strength and plasticity of the high-strength plastic water-resistant gypsum decorative material.
From example 4 and comparative example 2, it can be seen that the application adopts the vitrified small balls with larger meshes, so that the dispersibility of the vitrified small balls can be improved, and the strength of the high-strength plastic type water-resistant gypsum decorative material can be improved.
It can be seen from example 4 and comparative example 3 that the application adopts heavy calcium carbonate and vitrified micro bubbles to replace perlite and glass fiber, which can improve the problem of inconsistent shrinkage or expansion stress of the gypsum decorative material and improve the flexural strength and compressive strength of the gypsum decorative material.
As can be seen from example 4 and comparative example 4, the fumed silica adopted in the invention has the effects of anti-caking and anti-settling, the dispersibility of the system is improved, and the thixotropic property of the fumed silica improves the strength of the gypsum decorative material.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The high-strength plastic type waterproof gypsum decorative material is characterized by comprising the following preparation raw materials in parts by weight: 40-60 parts of high-strength gypsum, 10-30 parts of ground calcium carbonate, 5-15 parts of vitrified micro bubbles, 0.05-0.1 part of water repellent, 0.05-0.1 part of water retention thickener, 0.5-1.5 parts of hydrophobic re-dispersible emulsion powder, 0.05-0.13 part of gypsum retarder, 0.05-0.1 part of cream dispersant, 0.1-0.5 part of fumed silica and 0.1-0.2 part of hydroxypropyl methyl cellulose ether; the average grain diameter of the vitrified micro bubbles is 70-120 meshes.
2. The high-strength plastic-type water-resistant gypsum decorative material as claimed in claim 1, wherein the high-strength gypsum is α -high-strength gypsum.
3. The high strength plastic type water-resistant gypsum decoration material as claimed in claim 1, wherein the heavy calcium carbonate has a D50 particle size of 1-1.5 μm.
4. The high-strength plastic type water-resistant gypsum decorating material as claimed in claim 1, wherein the water repellent is prepared from sodium methylsiliconate and redispersible silane-based water repellent according to a mass ratio of 1: (1.2-1.8) mixing.
5. The high-strength plastic-type water-resistant gypsum decorating material as claimed in claim 1, wherein the water-retaining thickener is a cross-linked emulsion obtained by copolymerizing polyacrylate and methacrylic acid.
6. The high strength plastic type water-resistant gypsum decoration material of claim 1, wherein the fumed silica is hydrophobic fumed silica.
7. The high strength plastic type water-resistant gypsum decoration material of claim 6, wherein the hydrophobic fumed silica has a specific surface area of 90-180m2/g。
8. The high strength plastic type water resistant gypsum decorating material of claim 1, wherein the hydroxypropyl methyl cellulose ether is selected from one or more of LH55RR, HK40000, M4025.
9. The high-strength plastic-type water-resistant gypsum decorative material as claimed in any one of claims 1 to 8, wherein the raw material for preparing the high-strength plastic-type water-resistant gypsum decorative material further comprises 0.5 to 1 part by weight of magnesium aluminum silicate.
10. The preparation method of the high-strength plastic type waterproof gypsum decorative material of claim 9, which is characterized by comprising the following steps:
mixing high-strength gypsum, heavy calcium carbonate, vitrified micro bubbles, fumed silica and magnesium aluminum silicate, and uniformly stirring to obtain a first mixture;
adding hydrophobic re-dispersible latex powder, a cream dispersant, hydroxypropyl methyl cellulose ether, a water repellent, a water retention thickener and a gypsum retarder into the first mixture, and uniformly mixing to obtain the high-strength plastic water-resistant gypsum decorative material.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113943141A (en) * | 2021-11-30 | 2022-01-18 | 客诺环保科技(青岛)有限公司 | Surface-modified reinforced gypsum powder and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100912388B1 (en) * | 2009-03-23 | 2009-08-19 | (주)미래기술단 | The method of manufacturing painting composite with high water proof |
| CN101781083A (en) * | 2009-12-21 | 2010-07-21 | 浙江通达实业有限公司 | Hydrophobic hollow glass microsphere preparation method and prepared hydrophobic hollow glass microsphere thereof |
| EP2660224A1 (en) * | 2010-12-28 | 2013-11-06 | Mischenko, Valentyn Nikolayevich | Waterproofing composition |
| CN109133829A (en) * | 2018-08-17 | 2019-01-04 | 辽宁飞龙达建材科技有限公司 | A kind of lightweight wall plaster, preparation method and application |
| CN111454603A (en) * | 2020-04-30 | 2020-07-28 | 杭州蓝田涂料有限公司 | Waterproof and mildew-proof gypsum putty powder and preparation method thereof |
-
2021
- 2021-01-22 CN CN202110091214.4A patent/CN112830755B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100912388B1 (en) * | 2009-03-23 | 2009-08-19 | (주)미래기술단 | The method of manufacturing painting composite with high water proof |
| CN101781083A (en) * | 2009-12-21 | 2010-07-21 | 浙江通达实业有限公司 | Hydrophobic hollow glass microsphere preparation method and prepared hydrophobic hollow glass microsphere thereof |
| EP2660224A1 (en) * | 2010-12-28 | 2013-11-06 | Mischenko, Valentyn Nikolayevich | Waterproofing composition |
| CN109133829A (en) * | 2018-08-17 | 2019-01-04 | 辽宁飞龙达建材科技有限公司 | A kind of lightweight wall plaster, preparation method and application |
| CN111454603A (en) * | 2020-04-30 | 2020-07-28 | 杭州蓝田涂料有限公司 | Waterproof and mildew-proof gypsum putty powder and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 沈春林等: "《预拌砂浆的生产与施工》", 31 August 2015, 北京：中国建材工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113943141A (en) * | 2021-11-30 | 2022-01-18 | 客诺环保科技(青岛)有限公司 | Surface-modified reinforced gypsum powder and preparation method and application thereof |
| CN113943141B (en) * | 2021-11-30 | 2022-12-06 | 客诺环保科技(青岛)有限公司 | Surface modification enhanced gypsum powder and preparation method and application thereof |
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