CN114716204A - Building material and preparation method thereof - Google Patents
Building material and preparation method thereof Download PDFInfo
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- CN114716204A CN114716204A CN202210318066.XA CN202210318066A CN114716204A CN 114716204 A CN114716204 A CN 114716204A CN 202210318066 A CN202210318066 A CN 202210318066A CN 114716204 A CN114716204 A CN 114716204A
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical Kinetics & Catalysis (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The invention belongs to the technical field of building materials, and particularly relates to a building material and a preparation method thereof, wherein the building material comprises a heat-insulating layer, and the heat-insulating layer is prepared from the following raw materials in parts by weight: 30-50 parts of ordinary portland cement, 20-40 parts of fly ash, 10-15 parts of construction waste powder, 2-6 parts of glass fiber, 3-9 parts of calcium carbonate powder and 20-30 parts of water; the heat-insulating material disclosed by the invention is wide in raw material source, free of inflammable raw materials and chemical reagents, green, safe, environment-friendly, good in heat-insulating effect, simple in preparation method and suitable for industrial production and application.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a building material and a preparation method thereof.
Background
With the increasing shortage of resources, the development and use of energy-saving and environment-friendly materials are the development trend of current building materials. The heat insulating material has heat insulating function and is widely used, the most widely used heat insulating material at present is organic combustible material represented by polyphenyl foam, and the material has the structural characteristic of fine closed pores because the material contains volatile liquid foaming agent, and after heating and pre-foaming, a white object is heated and formed in a mould. However, since such a material has extremely strong flammability and a great potential safety hazard, a thermal insulation material having a good thermal insulation effect and high safety needs to be studied.
Disclosure of Invention
In order to solve the technical problems, the invention provides a building material and a preparation method thereof.
The invention is realized by the following technical scheme.
The first purpose of the invention is to provide a building material, which comprises an insulating layer, wherein the insulating layer is prepared from the following raw materials in parts by weight: 30-50 parts of ordinary portland cement, 20-40 parts of fly ash, 10-15 parts of building waste powder, 2-6 parts of glass fiber, 3-9 parts of calcium carbonate powder and 20-30 parts of water.
Preferably, the heat-insulating layer is coated with a flame-retardant layer, and the flame-retardant layer is prepared from the following raw materials in parts by weight: 20-40 parts of ordinary portland cement, 20-30 parts of fly ash, 10-15 parts of construction waste powder, 2-6 parts of aluminum hydroxide, 1-3 parts of magnesium hydroxide and 20-30 parts of water;
preferably, the particle size of the fly ash in the heat-insulating layer and the particle size of the fly ash in the flame-retardant layer are both 10-30 microns.
Preferably, the particle size of the construction waste powder in the heat-insulating layer and the particle size of the construction waste powder in the flame-retardant layer are 60 to 80 μm.
Preferably, the glass fiber has a length of 30 to 100 μm.
The second purpose of the invention is to provide a preparation method of the building material, which comprises the following steps:
s1, drying the fly ash, and grinding the fly ash into particles with the particle size of 10-30 mu m; drying the construction waste, and grinding the construction waste into particles with the particle size of 60-80 mu m;
respectively weighing the following raw materials in parts by weight: 30-50 parts of ordinary portland cement, 20-40 parts of fly ash, 10-15 parts of building waste powder, 2-6 parts of glass fiber, 3-9 parts of calcium carbonate powder and 20-30 parts of water;
s2, mixing the weighed ordinary portland cement, fly ash, building waste powder and glass fiber, ball milling, adding the weighed water after uniformly mixing the raw materials, and uniformly stirring to prepare premixed slurry;
s3, adding the weighed calcium carbonate powder into the S2 premixed slurry, and quickly stirring to prepare mixed slurry;
and S4, pouring the mixed slurry prepared in the S3 into a mold, sintering at the high temperature of 800-900 ℃, and naturally cooling to the room temperature to prepare the heat-insulating layer.
Preferably, the method further comprises the following steps:
respectively weighing the following raw materials in parts by weight: 20-40 parts of ordinary portland cement, 20-30 parts of fly ash, 10-15 parts of construction waste powder, 2-6 parts of aluminum hydroxide, 1-3 parts of magnesium hydroxide and 20-30 parts of water;
mixing and grinding the weighed raw materials of ordinary portland cement, fly ash, construction waste powder, aluminum hydroxide and magnesium hydroxide, then adding water, and uniformly stirring to prepare flame-retardant slurry; and (3) coating the flame-retardant slurry on two side surfaces of the heat-insulating layer prepared in S4 by scraping, and drying at 90-100 ℃ to obtain the flame-retardant layer.
Preferably, in S4, the thickness of the heat-insulating layer is 10-15 cm.
Preferably, the thickness of the flame retardant layer is 4-7 cm.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a heat-insulating building material aiming at the problems that the conventional heat-insulating material is flammable and has potential safety hazard, and the flame retardant property of the material is improved, and the specific mechanism is as follows: the invention uses the waste to replace a part of common portland cement, reduces the cost, strengthens the glass fiber and improves the mechanical property of the heat preservation layer, the invention adopts the calcium carbonate powder as the foaming agent, and is different from the traditional foaming agent in that, in the preparation process, when the calcium carbonate is sintered at the temperature of 800 ℃ and 900 ℃, the calcium carbonate is decomposed to generate calcium chloride and carbon dioxide, the generated calcium chloride has multiple functions, can be used as a drying agent, improves the drying property and the moisture resistance of the heat preservation layer, can also be used as a curing agent, improves the bonding capability among the raw materials of the heat preservation layer, and the generated gas carbon dioxide can be directly remained in the material, the material has a fine closed-cell bubble structure, so that the heat conduction performance of the material is reduced, and the heat insulation effect is improved; the heat-insulating material has wide sources and low cost, does not use chemical reagents, does not cause harm to human bodies, does not contain organic combustible substances, is not easy to burn, and improves the safety;
in order to further improve the safety of the material, a flame-retardant layer is arranged outside the heat-insulating layer, the base material of the flame-retardant layer is the same as the heat-insulating layer and is made of ordinary portland cement, fly ash and construction waste powder, so that firm combination between the two layers is facilitated, and the flame-retardant effect can be improved by adding aluminum hydroxide and magnesium hydroxide flame retardants into the base material.
The heat-insulating material disclosed by the invention is wide in raw material source, free of flammable raw materials and chemical reagents, green, safe and environment-friendly, good in heat-insulating effect, simple in preparation method and suitable for industrial production and application.
Detailed Description
In order to make the technical solutions of the present invention better understood and enable those skilled in the art to practice the present invention, the following examples and data are provided for further illustration, but the examples are not intended to limit the present invention.
The experimental methods and the detection methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials are commercially available, unless otherwise specified.
The invention provides a building material, which comprises a heat-insulating layer, wherein a flame-retardant layer is coated outside the heat-insulating layer;
the heat-insulating layer is prepared from the following raw materials in parts by weight: 30-50 parts of ordinary portland cement, 20-40 parts of fly ash, 10-15 parts of building waste powder, 2-6 parts of glass fiber, 3-9 parts of calcium carbonate powder and 20-30 parts of water;
the flame-retardant layer is prepared from the following raw materials in parts by weight: 20-40 parts of ordinary portland cement, 20-30 parts of fly ash, 10-15 parts of building waste powder, 2-6 parts of aluminum hydroxide, 1-3 parts of magnesium hydroxide and 20-30 parts of water.
The preparation method of the building material comprises the following steps:
s1, drying the fly ash, and grinding the fly ash into particles with the particle size of 10-30 mu m; drying the construction waste, and grinding the construction waste into particles with the particle size of 60-80 mu m;
respectively weighing the following raw materials in parts by weight: 30-50 parts of ordinary portland cement, 20-40 parts of fly ash, 10-15 parts of building waste powder, 2-6 parts of glass fiber, 3-9 parts of calcium carbonate powder and 20-30 parts of water;
s2, mixing the weighed ordinary portland cement, fly ash, building waste powder and glass fiber, ball milling, adding the weighed water after uniformly mixing the raw materials, and uniformly stirring to prepare premixed slurry;
s3, adding the weighed calcium carbonate powder into the S2 premixed slurry, and quickly stirring to prepare mixed slurry;
s4, pouring the mixed slurry prepared in the S3 into a mold, sintering at the high temperature of 800-900 ℃, and naturally cooling to room temperature to prepare a heat-insulating layer, wherein the thickness of the heat-insulating layer is 10-15 cm;
s5, respectively weighing the following raw materials in parts by weight: 20-40 parts of ordinary portland cement, 20-30 parts of fly ash, 10-15 parts of construction waste powder, 2-6 parts of aluminum hydroxide, 1-3 parts of magnesium hydroxide and 20-30 parts of water;
mixing and grinding the weighed raw materials of ordinary portland cement, fly ash, construction waste powder, aluminum hydroxide and magnesium hydroxide, then adding water, and uniformly stirring to prepare flame-retardant slurry; and (3) coating the flame-retardant slurry on two side surfaces of the heat-insulating layer prepared in S4 by scraping, and then drying at 90-100 ℃ to obtain the flame-retardant layer, wherein the thickness of the flame-retardant layer is 4-7 cm.
The following examples are intended to illustrate the present invention.
Example 1
A building material comprises a heat-insulating layer, wherein a flame-retardant layer is coated outside the heat-insulating layer;
the heat-insulating layer is prepared from the following raw materials in parts by weight: 30 parts of ordinary portland cement, 20 parts of fly ash, 10 parts of construction waste powder, 2 parts of glass fiber, 3 parts of calcium carbonate powder and 20 parts of water; the thickness of the heat-insulating layer is 10 cm;
the flame-retardant layer is prepared from the following raw materials in parts by weight: 20 parts of ordinary portland cement, 20 parts of fly ash, 10 parts of construction waste powder, 2 parts of aluminum hydroxide, 1 part of magnesium hydroxide and 20 parts of water; the thickness of the flame retardant layer is 4 cm.
The preparation method of the building material comprises the following steps:
s1, drying the fly ash, and grinding the fly ash into particles with the particle size of 10 microns; drying the construction waste and grinding the construction waste into particles with the particle size of 60 mu m; the length of the glass fiber is 30 μm;
respectively weighing the following raw materials in parts by weight: 30 parts of ordinary portland cement, 20 parts of fly ash, 10 parts of building waste powder, 2 parts of glass fiber, 3 parts of calcium carbonate powder and 20 parts of water;
s2, mixing the weighed ordinary portland cement, fly ash, building waste powder and glass fiber, ball milling, adding the weighed water after uniformly mixing the raw materials, and uniformly stirring to prepare premixed slurry;
s3, adding the weighed calcium carbonate powder into the S2 premixed slurry, and quickly stirring to prepare mixed slurry;
s4, pouring the mixed slurry prepared in the S3 into a mold, sintering at the high temperature of 800 ℃, and naturally cooling to the room temperature to prepare a heat insulation layer, wherein the thickness of the heat insulation layer is 10 cm;
s5, respectively weighing the following raw materials in parts by weight: 20 parts of ordinary portland cement, 20 parts of fly ash, 10 parts of construction waste powder, 2 parts of aluminum hydroxide, 1 part of magnesium hydroxide and 20 parts of water;
mixing and grinding the weighed raw materials of ordinary portland cement, fly ash, construction waste powder, aluminum hydroxide and magnesium hydroxide, then adding water, and uniformly stirring to prepare flame-retardant slurry; and (3) coating the flame-retardant slurry on two side surfaces of the heat-insulating layer prepared in S4 by scraping, and then drying at 90 ℃ to prepare the flame-retardant layer, wherein the thickness of the flame-retardant layer is 7 cm.
Example 2
A building material comprises a heat-insulating layer, wherein a flame-retardant layer is coated outside the heat-insulating layer;
the heat-insulating layer is prepared from the following raw materials in parts by weight: 50 parts of ordinary portland cement, 40 parts of fly ash, 15 parts of construction waste powder, 6 parts of glass fiber, 9 parts of calcium carbonate powder and 30 parts of water; the thickness of the heat-insulating layer is 15 cm;
the flame-retardant layer is prepared from the following raw materials in parts by weight: 40 parts of ordinary portland cement, 30 parts of fly ash, 15 parts of construction waste powder, 6 parts of aluminum hydroxide, 3 parts of magnesium hydroxide and 30 parts of water; the thickness of the flame retardant layer was 7 cm.
The preparation method of the building material comprises the following steps:
s1, drying the fly ash, and grinding the fly ash into particles with the particle size of 30 mu m; drying the construction waste and grinding the construction waste into particles with the particle size of 80 mu m; the length of the glass fiber is 100 mu m;
respectively weighing the following raw materials in parts by weight: 50 parts of ordinary portland cement, 40 parts of fly ash, 15 parts of construction waste powder, 6 parts of glass fiber, 9 parts of calcium carbonate powder and 30 parts of water;
s2, mixing the weighed ordinary portland cement, fly ash, building waste powder and glass fiber, ball milling, adding the weighed water after uniformly mixing the raw materials, and uniformly stirring to prepare premixed slurry;
s3, adding the weighed calcium carbonate powder into the S2 premixed slurry, and quickly stirring to prepare mixed slurry;
s4, pouring the mixed slurry prepared in the S3 into a mold, sintering at the high temperature of 900 ℃, and naturally cooling to the room temperature to prepare a heat insulation layer, wherein the thickness of the heat insulation layer is 15 cm;
s5, respectively weighing the following raw materials in parts by weight: 40 parts of ordinary portland cement, 30 parts of fly ash, 15 parts of construction waste powder, 6 parts of aluminum hydroxide, 3 parts of magnesium hydroxide and 30 parts of water;
mixing and grinding the weighed raw materials of ordinary portland cement, fly ash, construction waste powder, aluminum hydroxide and magnesium hydroxide, then adding water, and uniformly stirring to prepare flame-retardant slurry; and (3) coating the flame-retardant slurry on two side surfaces of the heat-insulating layer prepared in S4 by scraping, and then drying at 100 ℃ to prepare the flame-retardant layer, wherein the thickness of the flame-retardant layer is 4 cm.
Example 3
A building material comprises a heat-insulating layer, wherein a flame-retardant layer is coated outside the heat-insulating layer;
the heat-insulating layer is prepared from the following raw materials in parts by weight: 40 parts of ordinary portland cement, 30 parts of fly ash, 12 parts of construction waste powder, 4 parts of glass fiber, 6 parts of calcium carbonate powder and 25 parts of water; the thickness of the heat-insulating layer is 12 cm;
the flame-retardant layer is prepared from the following raw materials in parts by weight: 30 parts of ordinary portland cement, 25 parts of fly ash, 12 parts of construction waste powder, 4 parts of aluminum hydroxide, 2 parts of magnesium hydroxide and 25 parts of water; the thickness of the flame retardant layer is 5 cm.
The preparation method of the building material comprises the following steps:
s1, drying the fly ash, and grinding the fly ash into particles with the particle size of 20 microns; drying the construction waste and grinding the construction waste into particles with the particle size of 70 mu m; the length of the glass fiber is 50 μm;
respectively weighing the following raw materials in parts by weight: 40 parts of ordinary portland cement, 30 parts of fly ash, 12 parts of construction waste powder, 4 parts of glass fiber, 6 parts of calcium carbonate powder and 25 parts of water; the thickness of the heat-insulating layer is 12 cm; (ii) a
S2, mixing the weighed ordinary portland cement, fly ash, building waste powder and glass fiber, ball milling, adding the weighed water after uniformly mixing the raw materials, and uniformly stirring to prepare premixed slurry;
s3, adding the weighed calcium carbonate powder into the S2 premixed slurry, and quickly stirring to prepare mixed slurry;
s4, pouring the mixed slurry prepared in the S3 into a mold, sintering at 850 ℃, and naturally cooling to room temperature to prepare a heat insulation layer, wherein the thickness of the heat insulation layer is 12 cm;
s5, respectively weighing the following raw materials in parts by weight: 30 parts of ordinary portland cement, 25 parts of fly ash, 12 parts of construction waste powder, 4 parts of aluminum hydroxide, 2 parts of magnesium hydroxide and 25 parts of water;
mixing and grinding the weighed raw materials of ordinary portland cement, fly ash, construction waste powder, aluminum hydroxide and magnesium hydroxide, then adding water, and uniformly stirring to prepare flame-retardant slurry; and (3) coating the flame-retardant slurry on two side surfaces of the heat-insulating layer prepared in S4 by scraping, and then drying at 95 ℃ to obtain the flame-retardant layer, wherein the thickness of the flame-retardant layer is 6 cm.
Example 4
A building material comprises a heat-insulating layer, wherein a flame-retardant layer is coated outside the heat-insulating layer;
the heat-insulating layer is prepared from the following raw materials in parts by weight: 30 parts of ordinary portland cement, 40 parts of fly ash, 13 parts of construction waste powder, 5 parts of glass fiber, 7 parts of calcium carbonate powder and 28 parts of water; the thickness of the heat-insulating layer is 14 cm;
the flame-retardant layer is prepared from the following raw materials in parts by weight: 20 parts of ordinary portland cement, 27 parts of fly ash, 14 parts of construction waste powder, 4 parts of aluminum hydroxide, 1 part of magnesium hydroxide and 30 parts of water; the thickness of the flame retardant layer is 6 cm.
The preparation method of the building material comprises the following steps:
s1, drying the fly ash, and grinding the fly ash into particles with the particle size of 30 microns; drying the construction waste and grinding the construction waste into 65 mu m particle size; the length of the glass fiber is 70 μm;
respectively weighing the following raw materials in parts by weight: 30 parts of ordinary portland cement, 40 parts of fly ash, 13 parts of construction waste powder, 5 parts of glass fiber, 7 parts of calcium carbonate powder and 28 parts of water;
s2, mixing the weighed ordinary portland cement, fly ash, building waste powder and glass fiber, ball milling, adding the weighed water after uniformly mixing the raw materials, and uniformly stirring to prepare premixed slurry;
s3, adding the weighed calcium carbonate powder into the S2 premixed slurry, and quickly stirring to prepare mixed slurry;
s4, pouring the mixed slurry prepared in the S3 into a mold, sintering at the high temperature of 800 ℃, and naturally cooling to the room temperature to prepare a heat insulation layer, wherein the thickness of the heat insulation layer is 11 cm;
s5, respectively weighing the following raw materials in parts by weight: 20 parts of ordinary portland cement, 27 parts of fly ash, 14 parts of construction waste powder, 4 parts of aluminum hydroxide, 1 part of magnesium hydroxide and 30 parts of water;
mixing and grinding the weighed raw materials of ordinary portland cement, fly ash, construction waste powder, aluminum hydroxide and magnesium hydroxide, then adding water, and uniformly stirring to prepare flame-retardant slurry; and (3) coating the flame-retardant slurry on two side surfaces of the heat-insulating layer prepared in S4 by scraping, and then drying at 90 ℃ to prepare the flame-retardant layer, wherein the thickness of the flame-retardant layer is 5 cm.
Example 5
A building material comprises a heat-insulating layer, wherein a flame-retardant layer is coated outside the heat-insulating layer;
the heat-insulating layer is prepared from the following raw materials in parts by weight: 30 parts of ordinary portland cement, 20 parts of fly ash, 14 parts of construction waste powder, 6 parts of glass fiber, 8 parts of calcium carbonate powder and 30 parts of water; the thickness of the heat-insulating layer is 10 cm;
the flame-retardant layer is prepared from the following raw materials in parts by weight: 35 parts of ordinary portland cement, 30 parts of fly ash, 10 parts of construction waste powder, 5 parts of aluminum hydroxide, 2 parts of magnesium hydroxide and 20 parts of water; the thickness of the flame retardant layer was 7 cm.
The preparation method of the building material comprises the following steps:
s1, drying the fly ash, and grinding the fly ash into particles with the particle size of 30 mu m; drying the construction waste and grinding the construction waste into particles with the particle size of 60 mu m; the length of the glass fiber is 100 mu m;
respectively weighing the following raw materials in parts by weight: 30 parts of ordinary portland cement, 20 parts of fly ash, 14 parts of construction waste powder, 6 parts of glass fiber, 8 parts of calcium carbonate powder and 30 parts of water; the thickness of the heat-insulating layer is 10 cm;
s2, mixing the weighed ordinary portland cement, fly ash, building waste powder and glass fiber, ball milling, adding the weighed water after uniformly mixing the raw materials, and uniformly stirring to prepare premixed slurry;
s3, adding the weighed calcium carbonate powder into the S2 premixed slurry, and quickly stirring to prepare mixed slurry;
s4, pouring the mixed slurry prepared in the S3 into a mold, sintering at the high temperature of 900 ℃, and naturally cooling to the room temperature to prepare a heat insulation layer, wherein the thickness of the heat insulation layer is 13 cm;
s5, respectively weighing the following raw materials in parts by weight: 35 parts of ordinary portland cement, 30 parts of fly ash, 10 parts of construction waste powder, 5 parts of aluminum hydroxide, 2 parts of magnesium hydroxide and 20 parts of water; the thickness of the flame-retardant layer is 7 cm;
mixing and grinding the weighed raw materials of ordinary portland cement, fly ash, construction waste powder, aluminum hydroxide and magnesium hydroxide, then adding water, and uniformly stirring to prepare flame-retardant slurry; and (3) coating the flame-retardant slurry on two side surfaces of the heat-insulating layer prepared in S4 by scraping, and then drying at 90 ℃ to obtain the flame-retardant layer, wherein the thickness of the flame-retardant layer is 6 cm.
Comparative example 1
The same as in example 1, except that calcium carbonate was not contained.
Comparative example 2
Compared with the embodiment 1, the difference is that only the heat-insulating layer is used, and the flame-retardant layer is not contained.
Comparative example 3
Traditional polyphenyl foam thermal insulation material.
The following tests were performed on the insulation materials prepared in the above examples, and the results are shown in table 1:
TABLE 1 Performance data for insulation materials prepared in the examples
As can be seen from Table 1, compared with examples 1-5, because the comparative example 1 does not contain calcium carbonate, the thermal conductivity coefficient is higher, because the calcium carbonate powder is used as the foaming agent, and different from the traditional foaming agent, in the preparation process, when the calcium carbonate is sintered at 900 ℃ of 800-.
In order to test the safety of the inventive materials, the materials prepared in example 1, comparative example 2 and comparative example 3 were tested for flame retardancy, and the results are shown in table 2:
TABLE 2 flame retardance of each group
| Group of | Flame retardancy |
| Example 1 | V-0 |
| Comparative example 2 | V-0 |
| Comparative example 3 | Easy to burn and flame not to go out |
As can be seen from the results in Table 2, the currently common thermal insulation material in the comparative example 3 has no flame retardant effect, and the flame retardant property of the thermal insulation material in the comparative example 2 can reach V-0 grade only by containing the thermal insulation layer, because the material of the invention does not contain flammable organic components, the prepared material has good flame retardant property.
Therefore, the heat-insulating material has wide raw material sources, is not suitable for inflammable raw materials and chemical reagents, is green, safe and environment-friendly, has good heat-insulating effect and simple preparation method, and is suitable for industrial production and application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that such changes and modifications be included within the scope of the present invention as set forth in the appended claims and their equivalents.
Claims (9)
1. The building material is characterized by comprising an insulating layer, wherein the insulating layer is prepared from the following raw materials in parts by weight: 30-50 parts of ordinary portland cement, 20-40 parts of fly ash, 10-15 parts of building waste powder, 2-6 parts of glass fiber, 3-9 parts of calcium carbonate powder and 20-30 parts of water.
2. The building material of claim 1, wherein a flame retardant layer is further coated outside the thermal insulation layer, and the flame retardant layer is made of the following raw materials in parts by weight: 20-40 parts of ordinary portland cement, 20-30 parts of fly ash, 10-15 parts of construction waste powder, 2-6 parts of aluminum hydroxide, 1-3 parts of magnesium hydroxide and 20-30 parts of water.
3. The building material according to claim 1 or 2, wherein the particle size of the fly ash in the heat-insulating layer and the particle size of the fly ash in the flame-retardant layer are both 10 to 30 μm.
4. The building material according to claim 1 or 2, wherein the particle size of the construction waste powder in the heat-insulating layer and the particle size of the construction waste powder in the flame-retardant layer are each 60 to 80 μm.
5. The building material of claim 1, wherein the glass fibers have a length of 30-100 μ ι η.
6. The method for preparing a building material according to claim 1, wherein the building material is prepared by the following steps:
s1, respectively weighing the following raw materials in parts by weight: 30-50 parts of ordinary portland cement, 20-40 parts of fly ash, 10-15 parts of building waste powder, 2-6 parts of glass fiber, 3-9 parts of calcium carbonate powder and 20-30 parts of water;
s2, mixing the weighed ordinary portland cement, fly ash, construction waste powder and glass fiber, ball milling, adding the weighed water after uniformly mixing the raw materials, and uniformly stirring to prepare premixed slurry;
s3, adding the weighed calcium carbonate powder into the S2 premixed slurry, and quickly stirring to prepare mixed slurry;
and S4, pouring the mixed slurry prepared in the S3 into a mold, sintering at the high temperature of 800-900 ℃, and naturally cooling to the room temperature to prepare the heat-insulating layer.
7. The method for preparing a building material according to claim 6, further comprising the steps of:
respectively weighing the following raw materials in parts by weight: 20-40 parts of ordinary portland cement, 20-30 parts of fly ash, 10-15 parts of construction waste powder, 2-6 parts of aluminum hydroxide, 1-3 parts of magnesium hydroxide and 20-30 parts of water;
mixing and grinding the weighed raw materials of ordinary portland cement, fly ash, construction waste powder, aluminum hydroxide and magnesium hydroxide, then adding water, and uniformly stirring to prepare flame-retardant slurry; and (3) coating the flame-retardant slurry on two side surfaces of the heat-insulating layer prepared by S4 by scraping, and drying at 90-100 ℃ to obtain the flame-retardant layer.
8. The method for preparing a building material according to claim 6, wherein the insulating layer has a thickness of 10 to 15cm in S4.
9. The method for preparing a building material according to claim 7, wherein the thickness of the flame retardant layer is 4-7 cm.
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