CN108640588B - Anti-delaminating solid brick and preparation method thereof - Google Patents
Anti-delaminating solid brick and preparation method thereof Download PDFInfo
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- CN108640588B CN108640588B CN201810809430.6A CN201810809430A CN108640588B CN 108640588 B CN108640588 B CN 108640588B CN 201810809430 A CN201810809430 A CN 201810809430A CN 108640588 B CN108640588 B CN 108640588B
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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
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
- C04B41/515—Other specific metals
- C04B41/5155—Aluminium
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
- C04B41/69—Metals
-
- 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 relates to the field of building materials, and provides an anti-delaminating solid brick and a preparation method thereof. The anti-falling solid brick comprises the following raw materials in parts by weight: 15-20 parts of cement, 15-20 parts of clay, 30-40 parts of aggregate particles, 20-30 parts of fly ash, 10-15 parts of paper pulp waste liquid, 2-3 parts of fiber, 2-3 parts of borosilicate glass powder, 0.5-1 part of glaze material powder, 3-5 parts of boron carbide powder, 0.5-1 part of alumina micropowder, 1-2 parts of aluminum powder, 5-8 parts of hydroxyethyl cellulose and 5-8 parts of water glass. It is not easy to delaminate and has good quality. The preparation method is simple, and the prepared anti-delaminating solid brick is not easy to delaminate and has good quality.
Description
Technical Field
The invention relates to the field of building materials, in particular to an anti-delaminating solid brick and a preparation method thereof.
Background
The concrete solid brick is supported by adding water, stirring, forming and maintaining cement, aggregate, admixture and the like which are added according to needs. The method is mainly used for building walls. In the prior art, the wall body not only plays a role in supporting and bearing, but also plays a role in beautifying, but the coating on the surface of the existing hollow brick is easy to fall off, so that the hollow brick is layered, and the quality of the wall body is seriously influenced.
Disclosure of Invention
The invention aims to provide an anti-delaminating solid brick which is not easy to delaminate and has good quality.
The invention also aims to provide a preparation method of the anti-delaminating solid brick, which is simple, and the prepared anti-delaminating solid brick is not easy to delaminate and has good quality.
The embodiment of the invention is realized by the following steps:
an anti-delaminating solid brick comprises the following raw materials in parts by weight: 15-20 parts of cement, 15-20 parts of clay, 30-40 parts of aggregate particles, 20-30 parts of fly ash, 10-15 parts of paper pulp waste liquid, 2-3 parts of fiber, 2-3 parts of borosilicate glass powder, 0.5-1 part of glaze material powder, 3-5 parts of boron carbide powder, 0.5-1 part of alumina micropowder, 1-2 parts of aluminum powder, 5-8 parts of hydroxyethyl cellulose and 5-8 parts of water glass.
A preparation method of an anti-delaminating solid brick comprises the steps of uniformly mixing 30-40 parts of aggregate particles, 20-30 parts of fly ash and 2-3 parts of fibers, adding 15-20 parts of cement, 15-20 parts of clay and 10-15 parts of pulp waste liquid, adding water, uniformly mixing, carrying out mixing grinding, and carrying out extrusion forming to form a blank; uniformly mixing 2-3 parts of borosilicate glass powder, 0.5-1 part of glaze powder, 3-5 parts of boron carbide powder, 0.5-1 part of alumina micropowder and 1-2 parts of aluminum powder, adding 5-8 parts of hydroxyethyl cellulose and 5-8 parts of water glass, and continuously mixing to obtain a coating; coating the coating on the surface of the blank to obtain a blank; and curing and molding the blank.
The beneficial effects of the embodiment of the invention include:
the anti-delaminating solid brick provided by the embodiment of the invention has the advantages that the aluminum powder is added, so that external moisture and gas cannot reach a substrate through capillary holes, the coating has better shielding property, and the aluminum powder is easy to oxidize, so that the compact oxide layer further isolates air and moisture, the green body is effectively prevented from delaminating, and the color of the coating can be prevented from fading. By adding hydroxyethyl cellulose into water glass, the coating not only has good fluidity and better coating viscosity, but also has excellent water-locking and water-resisting effects, effectively prevents external moisture from entering a blank body, simultaneously ensures the water content between the blank and the coating, and further avoids the occurrence of layering or delamination.
According to the preparation method of the anti-stripping solid brick provided by the embodiment of the invention, the mixing uniformity of the materials can be greatly improved by controlling the mixing sequence of the materials, and then, the blank is directly coated with the coating to be formed into the blank and then oxidized, instead of maintaining the blank and then coating the coating. The operation mode of the embodiment can enable the blank to be coated with the coating when the blank is not formed, and partial coating can enter the blank so as to be tightly combined with the blank instead of being only attached to the surface of the blank, so that the phenomena of layering and delamination of the blank body are effectively prevented. In addition, the embodiment of the invention also carries out curing in a specific steam curing way, and controls the heating speed and the cooling speed of the steam curing way, thereby being beneficial to forming the blank body so as to obtain a product with better quality. Meanwhile, the added steam is beneficial to promoting the oxidation process of the aluminum powder, so that a compact oxidation film is formed on the blank in the maintenance process, and the moisture and air are effectively prevented from entering.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The anti-delaminating solid brick and the method for manufacturing the same according to the embodiment of the present invention will be specifically described below.
The embodiment provides an anticreep layer solid brick, its raw materials include by weight: 15-20 parts of cement, 15-20 parts of clay, 30-40 parts of aggregate particles, 20-30 parts of fly ash, 10-15 parts of paper pulp waste liquid, 2-3 parts of fiber, 2-3 parts of borosilicate glass powder, 0.5-1 part of glaze material powder, 3-5 parts of boron carbide powder, 0.5-1 part of alumina micropowder, 1-2 parts of aluminum powder, 5-8 parts of hydroxyethyl cellulose and 5-8 parts of water glass.
Preferably, the raw materials comprise the following components in parts by weight: 16-18 parts of cement, 16-18 parts of clay, 32-38 parts of aggregate particles, 22-28 parts of fly ash, 12-14 parts of pulp waste liquid, 2-2.5 parts of fiber, 2-2.5 parts of borosilicate glass powder, 0.8-1 part of glaze material powder, 3-4 parts of boron carbide powder, 0.8-1 part of alumina micro powder, 1-1.5 parts of aluminum powder, 5-7 parts of hydroxyethyl cellulose and 5-7 parts of water glass.
The cement, the clay, the aggregate particles, the fly ash and the pulp waste liquid are used as conventional raw materials for preparing the hollow brick, and the cement, the clay, the aggregate particles, the fly ash and the pulp waste liquid are uniformly mixed and then extruded to form a blank. However, the inventor researches and discovers that the hollow brick in the prior art has poor bonding effect with the coating, and the delamination of the layer is easy to occur in the using process. For this reason, in the present embodiment, the mixture ratio of the above components is improved, so that the proportion of the aggregate particles, the cement with viscosity, the clay, and the pulp waste liquid in the above raw materials is higher, thereby ensuring the strength and viscosity of the blank, and further, in the present embodiment, 2 to 2.5 parts of fibers are also added, specifically, in the present embodiment, the fibers include one or more of wood fibers, vinylon fibers, glass fibers, and plant fibers. The compressive strength of the blank can be improved by adding the fibers, and meanwhile, the mixing uniformity of the aggregate particles can be improved when the aggregate particles are mixed.
Whether the distribution of the aggregate particles is uniform or not is a large cause of the dispersion of the billet strength. In the embodiment, the aggregate particles comprise 40-55% of first particles, 20-30% of second particles and 25-40% of third particles in percentage by mass; the particle size of the first particles is more than 2mm and less than or equal to 3 mm; the particle size of the second particles is more than 0.1mm and less than or equal to 2 mm; the third granules have a particle size of 0.1mm or less. In this example, when the aggregate particles are added, the aggregate particles are mixed in advance, and added after being uniformly mixed. The concrete mixed mode is, add the second granule earlier in the great first granule of granule, after the misce bene, add the minimum third granule of particle diameter again, through carrying out the mode of mixing step by step in this embodiment, is favorable to promoting the mixing uniformity of aggregate granule, and then improves the intensity of blank. In addition, fly ash and fibers can be added after mixing, the mixing uniformity of the fly ash and the fibers can be further improved, and the fibers are favorable for tightly attaching the fly ash to the surfaces of aggregate particles, so that uniform mixing is realized.
In addition, 2-3 parts of borosilicate glass powder, 0.5-1 part of glaze powder, 3-5 parts of boron carbide powder, 0.5-1 part of alumina micropowder, 1-2 parts of aluminum powder, 5-8 parts of hydroxyethyl cellulose and 5-8 parts of water glass can form a coating for coating the surface of a blank to protect the blank. It is worth noting that in this embodiment, by adding the alumina micro powder and the aluminum powder, the metallic luster of the coating is favorably improved, and the coating can reflect visible light and ultraviolet rays, thereby effectively preventing the blank from being oxidized, meanwhile, the aluminum powder is parallel to the blank after being dispersed on the surface of the blank, a plurality of aluminum powders are connected with each other, the large particles and the small particles are mutually filled to form a continuous metal film, the blank is covered, and light rays outside the coating film are reflected, so that the coating has strong covering power, the aluminum powder dispersed in the carrier generates floating motion, the motion result always makes the aluminum powder parallel to the substrate coated by the carrier, a continuous aluminum powder layer is formed, and the aluminum powder layers are arranged in parallel in the carrier film in multiple layers. The pores among the aluminum powder layers are staggered, capillary pores of the carrier film are cut off, external moisture and gas cannot reach the substrate through the capillary pores, so that the coating has better shielding property, the aluminum powder is easy to oxidize, and therefore, the compact oxide layer further isolates air and moisture, the green body is effectively prevented from delaminating, and meanwhile, the coating can be prevented from fading.
And the water glass and the hydroxyethyl cellulose are mixed together to be used as a binding agent, the structure of the hydroxyethyl cellulose contains hydroxyl and ether bonds, and oxygen atoms on the hydroxyl and ether bond groups are associated with water molecules to form hydrogen bonds, so that free water is changed into bound water to wrap the water, and the water-retaining effect is achieved. In the embodiment, by adding the hydroxyethyl cellulose into the water glass, the coating not only has good fluidity and better coating viscosity, but also has excellent water locking and resisting effect, thereby effectively preventing external moisture from entering a blank body, simultaneously ensuring the water content between the blank and the coating, and further avoiding the occurrence of layering or delaminating.
In the embodiment, borosilicate glass powder, glaze powder, boron carbide powder, alumina micro powder and aluminum powder are mixed to form a first mixture, hydroxyethyl cellulose and water glass are mixed to form a second mixture, and the mass ratio of the first mixture to the second mixture is 1: 1.3-1.5. The quality ratio can ensure that the coating has good bonding effect and good film forming effect.
In addition, the embodiment also provides a preparation method of the anti-separation layer solid brick, which comprises the following steps:
s1: forming a blank.
Uniformly mixing 30-40 parts of aggregate particles, 20-30 parts of fly ash and 2-3 parts of fibers, adding 15-20 parts of cement, 15-20 parts of clay and 10-15 parts of pulp waste liquid, adding water, uniformly mixing, carrying out mixing grinding, and carrying out extrusion forming to form a blank.
Specifically, the aggregate particles comprise 40-55% of first particles, 20-30% of second particles and 25-40% of third particles in percentage by mass; the particle size of the first particles is more than 2mm and less than or equal to 3 mm; the particle size of the second particles is more than 0.1mm and less than or equal to 2 mm; the particle size of the third particles is less than or equal to 0.1 mm; when the aggregate particles, the fly ash and the fibers are mixed, the first particles and the second particles are uniformly mixed, then the third particles are uniformly added, and then the fly ash and the fibers are added and uniformly mixed.
S2: forming the coating.
After 2-3 parts of borosilicate glass powder, 0.5-1 part of glaze powder, 3-5 parts of boron carbide powder, 0.5-1 part of alumina micropowder and 1-2 parts of aluminum powder are uniformly mixed, 5-8 parts of hydroxyethyl cellulose and 5-8 parts of water glass are added and continuously mixed, and the coating is obtained.
S3: forming a green body.
And coating the coating on the surface of the blank to obtain a blank.
S4: and (5) curing and forming.
Curing the blank at 20-25 deg.c for 5-8 hr,
and then introducing steam to raise the temperature to 50-60 ℃ for curing for 4-5h, specifically, raising the temperature to 30-35 ℃ at a temperature raising speed of 4-6 ℃/h, then raising the temperature to 40-45 ℃ at a temperature raising speed of 7-9 ℃/h, and then raising the temperature to 50-60 ℃ at a temperature raising speed of 10-12 ℃/h, and curing for 4-5 h.
Maintaining at 50-60 deg.C for 10-12h, and
then cooling to 20-25 ℃ and continuing curing for 10-20h, wherein the cooling speed is 2-3 ℃/h.
According to the embodiment of the invention, the mixing uniformity of the materials can be greatly improved by controlling the mixing sequence of the materials, and then, the blank is directly coated with the coating to be oxidized after being molded into the blank, rather than the blank is maintained and then coated with the coating. The operation mode of the embodiment can enable the blank to be coated with the coating when the blank is not formed, and partial coating can enter the blank so as to be tightly combined with the blank instead of being only attached to the surface of the blank, so that the phenomena of layering and delamination of the blank body are effectively prevented. In addition, the embodiment of the invention also carries out curing in a specific steam curing way, and controls the heating speed and the cooling speed of the steam curing way, thereby being beneficial to forming the blank body so as to obtain a product with better quality. Meanwhile, the added steam is beneficial to promoting the oxidation process of the aluminum powder, so that a compact oxidation film is formed on the blank in the maintenance process, and the moisture and air are effectively prevented from entering.
The anti-delaminating solid brick and the preparation method thereof according to the present invention will be further described with reference to the following examples.
Example 1
The embodiment provides a solid brick with an anti-falling layer.
The raw materials comprise the following components in parts by weight: 15 parts of cement, 15 parts of clay, 30 parts of aggregate particles, 30 parts of fly ash, 15 parts of pulp waste liquid, 2 parts of fibers, 2 parts of borosilicate glass powder, 0.5 part of glaze powder, 5 parts of boron carbide powder, 1 part of alumina micropowder, 2 parts of aluminum powder, 8 parts of hydroxyethyl cellulose and 6 parts of water glass (the mass ratio of the first mixture to the second mixture is 10.5: 14).
Wherein the aggregate particles comprise 40% of first particles, 30% of second particles and 30% of third particles in percentage by mass; the particle size of the first particles is more than 2mm and less than or equal to 3 mm; the particle size of the second particles is more than 0.1mm and less than or equal to 2 mm; the third granules have a particle size of 0.1mm or less.
The preparation method comprises the following steps:
s1: the first particles and the second particles are uniformly mixed, then the third particles are uniformly added, and then the fly ash and the fibers are added and uniformly mixed. Adding cement, clay and pulp waste liquid, adding water, mixing uniformly, mixing and grinding, and extruding and forming to form a blank.
S2: after uniformly mixing borosilicate glass powder, glaze powder, boron carbide powder, alumina micro powder and aluminum powder, adding water glass and continuously mixing to obtain the coating.
S3: and coating the coating on the surface of the blank to obtain a blank.
S4: and curing the blank at the temperature of 20-25 ℃ for 5h, heating to 30-35 ℃ at the heating rate of 4 ℃/h, heating to 40-45 ℃ at the heating rate of 7 ℃/h, heating to 50-60 ℃ at the heating rate of 10 ℃/h, and co-curing for 4-5 h. Maintaining at 50-60 deg.C for 10 hr, cooling to 20-25 deg.C, and maintaining for 10-20 hr at a cooling rate of 2 deg.C/hr.
Example 2
The embodiment provides a solid brick with an anti-falling layer.
The raw materials comprise the following components in parts by weight: 20 parts of cement, 20 parts of clay, 40 parts of aggregate particles, 20 parts of fly ash, 10 parts of pulp waste liquid, 3 parts of fibers, 3 parts of borosilicate glass powder, 1 part of glaze powder, 3 parts of boron carbide powder, 1 part of alumina micropowder, 2 parts of aluminum powder, 8 parts of hydroxyethyl cellulose and 5 parts of water glass (the mass ratio of the first mixture to the second mixture is 10: 13).
The aggregate particles comprise 55% of first particles, 20% of second particles and 25% of third particles in percentage by mass.
The preparation method comprises the following steps:
s1: the first particles and the second particles are uniformly mixed, then the third particles are uniformly added, and then the fly ash and the fibers are added and uniformly mixed. Adding cement, clay and pulp waste liquid, adding water, mixing uniformly, mixing and grinding, and extruding and forming to form a blank.
S2: after uniformly mixing borosilicate glass powder, glaze powder, boron carbide powder, alumina micro powder and aluminum powder, adding water glass and continuously mixing to obtain the coating.
S3: and coating the coating on the surface of the blank to obtain a blank.
S4: and curing the blank body at the temperature of 20-25 ℃ for 8h, heating to 30-35 ℃ at the heating rate of 6 ℃/h, heating to 40-45 ℃ at the heating rate of 9 ℃/h, heating to 50-60 ℃ at the heating rate of 12 ℃/h, and curing for 4-5 h. Maintaining at 50-60 deg.C for 12 hr, cooling to 20-25 deg.C, and maintaining for 10-13 hr at a cooling rate of 3 deg.C/h.
Example 3
The embodiment provides a solid brick with an anti-falling layer.
The raw materials comprise the following components in parts by weight: 18 parts of cement, 18 parts of clay, 35 parts of aggregate particles, 25 parts of fly ash, 13 parts of pulp waste liquid, 2.5 parts of fibers, 2.5 parts of borosilicate glass powder, 0.5 part of glaze powder, 4 parts of boron carbide powder, 1 part of alumina micro powder, 2 parts of aluminum powder, 8 parts of hydroxyethyl cellulose and 7 parts of water glass (the mass ratio of the first mixture to the second mixture is 10: 15).
Wherein, the aggregate particles comprise 50 percent of the first particles, 25 percent of the second particles and 25 percent of the third particles in percentage by mass.
The preparation method comprises the following steps:
s1: the first particles and the second particles are uniformly mixed, then the third particles are uniformly added, and then the fly ash and the fibers are added and uniformly mixed. Adding cement, clay and pulp waste liquid, adding water, mixing uniformly, mixing and grinding, and extruding and forming to form a blank.
S2: after uniformly mixing borosilicate glass powder, glaze powder, boron carbide powder, alumina micro powder and aluminum powder, adding water glass and continuously mixing to obtain the coating.
S3: and coating the coating on the surface of the blank to obtain a blank.
S4: and curing the blank at the temperature of 20-25 ℃ for 6h, heating to 30-35 ℃ at the heating rate of 5 ℃/h, heating to 40-45 ℃ at the heating rate of 8 ℃/h, heating to 50-60 ℃ at the heating rate of 11 ℃/h, and curing for 4-5 h. Maintaining at 50-60 deg.C for 11h, cooling to 20-25 deg.C, and maintaining for 10-20h at a cooling rate of 2 deg.C/h.
Test examples
The anti-spalling layer solid brick provided in example 1 was used as test example 1;
a solid brick prepared by omitting the fibers in example 1 was used as comparative example 1;
replacing borosilicate glass powder, glaze powder, boron carbide powder, alumina micropowder, aluminum powder, hydroxyethyl cellulose and water glass in the embodiment 1 with a solid brick prepared by common coating (acrylic acid waterproof emulsion, organosilicon emulsion, titanium dioxide, quartz powder, auxiliary agent and water) in the prior art to be used as a comparative example 2;
test example 1, comparative example 1 and comparative example 2 were collectively subjected to adhesion test.
The test method comprises the following steps: the method comprises the steps of using a hundred-grid knife to scratch 10 multiplied by 10 (100) 1mm multiplied by 1mm small grids on the surface of a test sample, enabling each piece of marked line to be deep to the bottom layer of a coating layer, using a brush to brush fragments in a test area, using 3M600 adhesive tape to stick the small grid to be tested, using an eraser to wipe the adhesive tape with force to increase the contact area and force between the adhesive tape and the area to be tested, using a hand to grasp one end of the adhesive tape, rapidly tearing off the adhesive tape in the vertical direction, and carrying out 2 times of same tests at the same position.
Experimental conditions and standards: the adhesive tape of 3M600 is stuck in the grid, the adhesive tape is pulled up quickly, and the number of the coating layers stuck by the adhesive tape is as per the percentage of the grid:
ISO class: 0 — ASTM rating: 5B (the edges of the cut are completely smooth, the edges of the grid do not have any flaking)
ISO class: 1-ASTM rating: 4B (small pieces are stripped at the intersection of the cuts, and the actual damage in the grid cutting area is less than or equal to 5%)
ISO class: 2 — ASTM rating: 3B (the edge and/or the intersection of the notch is stripped, and the area of the notch is more than 5% -15%)
ISO class: ASTM grade 3 ═ ASTM grade: 2B (partial peeling or whole large peeling or partial lattice peeling by whole piece along the edge of the cut, the peeling area is more than 15% -35%)
ISO class: 4-ASTM rating: 1B (the cut edge is stripped off in a large piece and/or some grids are partially or completely stripped off and the area of the grid is 35% -65% larger than that of the grid area)
ISO class: 5-ASTM rating: 0B (with flaked paint falling off at the edge and intersection of the score line, and total area of falling off greater than 65%)
The test results are shown in Table 1.
TABLE 1 test results
| Test sample | Test example 1 | Comparative example 1 | Comparative example 2 |
| Test results | 4B | 3B | 2B |
And then, carrying out strength detection, water content detection and drying shrinkage rate detection on the solid bricks provided in the test example 1, the comparative example 1 and the comparative example 2, wherein the detection method is carried out according to masonry structure design specifications (GB 50003-2001). See table 2 for test data:
TABLE 2 test data
As can be seen from tables 1 and 2, the performance of the air brick provided in experimental example 1 is much better than that of the air brick provided in comparative example 1 and comparative example 2. The compact oxide film is formed on the blank body, and the moisture and the air are effectively prevented from entering. The coating has excellent water-locking and water-resisting effects, effectively prevents external water from entering a blank, simultaneously ensures the water content between the blank and the coating, and further avoids the occurrence of layering or delaminating.
In conclusion, the anti-delaminating solid brick prepared by adopting the specific components and the specific preparation method provided by the embodiment of the invention has excellent compressive strength, and due to the addition of the aluminum powder, external moisture and gas cannot reach a substrate through capillary holes, so that the coating has better shielding property, and the aluminum powder is easily oxidized, thereby further isolating air and moisture from a compact oxide layer, effectively avoiding delaminating of a blank body and simultaneously preventing the color of the coating from fading. By adding hydroxyethyl cellulose into water glass, the coating not only has good fluidity and better coating viscosity, but also has excellent water-locking and water-resisting effects, effectively prevents external moisture from entering a blank body, simultaneously ensures the water content between the blank and the coating, and further avoids the occurrence of layering or delamination.
According to the embodiment of the invention, the mixing uniformity of the materials can be greatly improved by controlling the mixing sequence of the materials, and then, the blank is directly coated with the coating to be oxidized after being molded into the blank, rather than the blank is maintained and then coated with the coating. The operation mode of the embodiment can enable the blank to be coated with the coating when the blank is not formed, and partial coating can enter the blank so as to be tightly combined with the blank instead of being only attached to the surface of the blank, so that the phenomena of layering and delamination of the blank body are effectively prevented. In addition, the embodiment of the invention also carries out curing in a specific steam curing way, and controls the heating speed and the cooling speed of the steam curing way, thereby being beneficial to forming the blank body so as to obtain a product with better quality. Meanwhile, the added steam is beneficial to promoting the oxidation process of the aluminum powder, so that a compact oxidation film is formed on the blank in the maintenance process, and the moisture and air are effectively prevented from entering.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The anti-delaminating solid brick is characterized by comprising the following raw materials in parts by weight: 15-20 parts of cement, 15-20 parts of clay, 30-40 parts of aggregate particles, 20-30 parts of fly ash, 10-15 parts of pulp waste liquid, 2-3 parts of fiber, 2-3 parts of borosilicate glass powder, 0.5-1 part of glaze material powder, 3-5 parts of boron carbide powder, 0.5-1 part of alumina micropowder, 1-2 parts of aluminum powder, 5-8 parts of hydroxyethyl cellulose and 5-8 parts of water glass;
the preparation method of the delamination-proof solid brick comprises the following steps: uniformly mixing 30-40 parts of aggregate particles, 20-30 parts of fly ash and 2-3 parts of fibers, adding 15-20 parts of cement, 15-20 parts of clay and 10-15 parts of pulp waste liquid, adding water, uniformly mixing, carrying out mixing grinding, and carrying out extrusion forming to form a blank;
uniformly mixing 2-3 parts of borosilicate glass powder, 0.5-1 part of glaze powder, 3-5 parts of boron carbide powder, 0.5-1 part of alumina micropowder and 1-2 parts of aluminum powder, adding 5-8 parts of hydroxyethyl cellulose and 5-8 parts of water glass, and continuously mixing to obtain a coating;
coating the coating on the surface of the blank to obtain a blank;
and curing and molding the blank.
2. The anti-delaminating solid brick of claim 1, wherein the raw materials comprise, in parts by weight: 16-18 parts of cement, 16-18 parts of clay, 32-38 parts of aggregate particles, 22-28 parts of fly ash, 12-14 parts of pulp waste liquid, 2-2.5 parts of fiber, 2-2.5 parts of borosilicate glass powder, 0.8-1 part of glaze material powder, 3-4 parts of boron carbide powder, 0.8-1 part of alumina micropowder, 1-1.5 parts of aluminum powder, 5-7 parts of hydroxyethyl cellulose and 5-7 parts of water glass.
3. The anti-delaminating solid brick according to claim 1, wherein the borosilicate glass powder, the glaze powder, the boron carbide powder, the alumina micro powder and the aluminum powder are mixed to form a first mixture, the hydroxyethyl cellulose and the water glass are mixed to form a second mixture, and the mass ratio of the first mixture to the second mixture is 1: 1.3-1.5.
4. The anti-drop layer solid brick as claimed in claim 1, wherein the aggregate particles comprise 40-55% by mass of the first particles, 20-30% by mass of the second particles and 25-40% by mass of the third particles; the particle size of the first particles is more than 2mm and less than or equal to 3 mm; the particle size of the second particles is more than 0.1mm and less than or equal to 2 mm; the third particles have a particle size of 0.1mm or less.
5. The anti-drop layer solid brick as claimed in claim 1, wherein the fibers comprise one or more of wood fibers, vinylon fibers, glass fibers and plant fibers.
6. A preparation method of an anti-falling solid brick, which is characterized in that,
uniformly mixing 30-40 parts of aggregate particles, 20-30 parts of fly ash and 2-3 parts of fibers, adding 15-20 parts of cement, 15-20 parts of clay and 10-15 parts of pulp waste liquid, adding water, uniformly mixing, carrying out mixing grinding, and carrying out extrusion forming to form a blank;
uniformly mixing 2-3 parts of borosilicate glass powder, 0.5-1 part of glaze powder, 3-5 parts of boron carbide powder, 0.5-1 part of alumina micropowder and 1-2 parts of aluminum powder, adding 5-8 parts of hydroxyethyl cellulose and 5-8 parts of water glass, and continuously mixing to obtain a coating;
coating the coating on the surface of the blank to obtain a blank;
and curing and molding the blank.
7. The preparation method of the anti-delaminating solid brick according to claim 6, wherein the aggregate particles comprise 40-55% of the first particles, 20-30% of the second particles and 25-40% of the third particles by mass percent; the particle size of the first particles is more than 2mm and less than or equal to 3 mm; the particle size of the second particles is more than 0.1mm and less than or equal to 2 mm; the particle size of the third particles is less than or equal to 0.1 mm;
when the aggregate particles, the fly ash and the fibers are mixed, the first particles and the second particles are uniformly mixed, then the third particles are uniformly added, and then the fly ash and the fibers are added and uniformly mixed.
8. The method for preparing the anti-delaminating solid brick according to claim 6, wherein curing the green body comprises:
curing the blank at 20-25 ℃ for 5-8h,
then introducing steam to raise the temperature to 50-60 ℃ and curing for 4-5h,
maintaining at 50-60 deg.C for 10-12h, and
then cooling to 20-25 ℃ and continuing curing for 10-20 h.
9. The method for preparing the anti-peeling solid brick according to claim 8, wherein in the process of raising the temperature to 40-60 ℃, the temperature is raised to 30-35 ℃ at a temperature raising rate of 4-6 ℃/h, then raised to 40-45 ℃ at a temperature raising rate of 7-9 ℃/h, and then raised to 50-60 ℃ at a temperature raising rate of 10-12 ℃/h, and then maintained for 4-5 h.
10. The method for preparing the anti-stripping solid brick as claimed in claim 8, wherein the cooling rate is 2-3 ℃/h in the process of cooling to 20-25 ℃.
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| CN101186472A (en) * | 2007-12-20 | 2008-05-28 | 河北农业大学 | Technique for reclaiming and utilizing building garbage and industrial solid castoff |
| CN104649626A (en) * | 2013-11-22 | 2015-05-27 | 吕孟龙 | Highly dense alkali-activated coating material |
| WO2016025300A1 (en) * | 2014-08-11 | 2016-02-18 | Lubrizol Advanced Materials, Inc. | Aqueous copolymer coating compositions for industrial and construction applications |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101186472A (en) * | 2007-12-20 | 2008-05-28 | 河北农业大学 | Technique for reclaiming and utilizing building garbage and industrial solid castoff |
| CN104649626A (en) * | 2013-11-22 | 2015-05-27 | 吕孟龙 | Highly dense alkali-activated coating material |
| WO2016025300A1 (en) * | 2014-08-11 | 2016-02-18 | Lubrizol Advanced Materials, Inc. | Aqueous copolymer coating compositions for industrial and construction applications |
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