CN110512754B - Composite insulation board with three-dimensional structure interface and preparation method thereof - Google Patents
Composite insulation board with three-dimensional structure interface and preparation method thereof Download PDFInfo
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- CN110512754B CN110512754B CN201810489455.2A CN201810489455A CN110512754B CN 110512754 B CN110512754 B CN 110512754B CN 201810489455 A CN201810489455 A CN 201810489455A CN 110512754 B CN110512754 B CN 110512754B
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- 238000009413 insulation Methods 0.000 title claims abstract description 91
- 239000002131 composite material Substances 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000011083 cement mortar Substances 0.000 claims abstract description 30
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000004321 preservation Methods 0.000 claims abstract description 9
- 239000006096 absorbing agent Substances 0.000 claims description 20
- 239000004568 cement Substances 0.000 claims description 19
- 238000002310 reflectometry Methods 0.000 claims description 15
- 239000004576 sand Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 12
- 239000010451 perlite Substances 0.000 claims description 11
- 235000019362 perlite Nutrition 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 10
- 229920006248 expandable polystyrene Polymers 0.000 claims description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 6
- 239000006229 carbon black Substances 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- 229920001940 conductive polymer Polymers 0.000 claims description 6
- 229910021389 graphene Inorganic materials 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 6
- 229910000859 α-Fe Inorganic materials 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229940099259 vaseline Drugs 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000005373 porous glass Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 11
- 239000004566 building material Substances 0.000 abstract description 8
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000001028 reflection method Methods 0.000 description 5
- 230000005670 electromagnetic radiation Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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- 238000000576 coating method Methods 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements slab-shaped
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
-
- 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
- C04B2111/00025—Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00258—Electromagnetic wave absorbing or shielding materials
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B2001/925—Protection against harmful electro-magnetic or radio-active radiations, e.g. X-rays
Abstract
The invention relates to a composite insulation board with a three-dimensional structural interface and a preparation method thereof, wherein the preparation method comprises the following steps: surrounding the heat-insulating board by a model frame, pouring cement mortar to prepare a mortar layer, trowelling, hardening and demolding to obtain the composite heat-insulating board with a three-dimensional structure interface; the mortar layer is one or more layers; wherein, at least one side surface of the heat preservation plate is provided with a three-dimensional structure which is regularly arranged; the three-dimensional structure is pyramid, prism or cylinder. The method is simple, has higher precision, strong electromagnetic wave absorption and adjustable thickness, can be directly used as a building component, and can reduce the thickness of building materials and the cost of building construction.
Description
Technical Field
The invention relates to the field of building materials, in particular to a composite insulation board with a three-dimensional structure interface and a preparation method thereof.
Background
With the rapid development of science and technology, electronic and electric devices are increasingly widely applied to various fields of communication, industry, scientific research, medical treatment, broadcasting and the like, the living environment and working environment of human beings are almost surrounded by electronic, electric appliances and communication devices, and electromagnetic radiation generated during the working of the devices causes the space electromagnetic environment to be increasingly deteriorated. Electromagnetic radiation pollution has become a new type of pollution with great potential hazards. The electromagnetic wave absorbing building material is a functional building material capable of converting electromagnetic energy into heat energy through energy conversion or interference effect and the like, and can reasonably and effectively control the background intensity of electromagnetic radiation in a building space and reduce the harm of the electromagnetic radiation. Aiming at the problem of serious electromagnetic pollution, the development of electromagnetic wave absorbing building materials with wide frequency band, strong absorption and thin thickness becomes the main direction of the research of wave absorbing building materials.
The cement-based material is the most widely applied material in the current building, the cement-based electromagnetic absorption material is studied earlier, and comprises wave-absorbing concrete, wave-absorbing mortar and the like, and most of the cement-based electromagnetic absorption material is formed by adding wave-absorbing agents and simultaneously carrying out structural design. The structural design method mainly adopted mainly comprises the steps of realizing impedance matching, adding wave-transparent materials, selecting a surface by frequency and the like. Graded surface shapes are one of the methods of achieving impedance matching, commonly used in wave-absorbing darkrooms, most commonly including pyramidal, wedge-shaped. Multilayer compounding is a common method for realizing impedance matching, most interfaces are planar, the matching effect is better when the number of layers is larger, the wave absorbing performance is better, and the cost is increased.
Disclosure of Invention
The invention mainly aims to provide a novel composite insulation board with a three-dimensional structure interface and a preparation method thereof, and aims to solve the technical problems that the novel composite insulation board changes the propagation path of incident electromagnetic waves, can form reflection and refraction between adjacent shapes, increases the propagation path and increases the electromagnetic wave loss, so that the novel composite insulation board is more practical.
The aim and the technical problems of the invention are realized by adopting the following technical proposal. The invention provides a preparation method of a composite insulation board with a three-dimensional structure interface, which comprises the following steps:
surrounding the heat-insulating board by a model frame, pouring cement mortar to prepare a mortar layer, trowelling, hardening and demolding to obtain the composite heat-insulating board with a three-dimensional structure interface; the mortar layer is one or more layers;
wherein, at least one side surface of the heat preservation plate is provided with a three-dimensional structure which is regularly arranged; the three-dimensional structure is pyramid, prism or cylinder.
The aim and the technical problems of the invention can be further realized by adopting the following technical measures.
Preferably, in the method for preparing the composite insulation board with the three-dimensional structure interface, the three-dimensional structure is a pyramid, the bottom surface of the pyramid is attached to the board surface, and the bottom edges of the pyramids are adjacently arranged or the pyramids are arranged in a matrix with a preset distance.
Preferably, the method for preparing the composite insulation board with the three-dimensional structure interface is characterized in that the three-dimensional structure is a prism or a cylinder, the bottom surface of the prism or the cylinder is attached to the board surface, and the prisms or the cylinders are arranged in a matrix with a preset distance.
Preferably, in the method for preparing a composite insulation board with a three-dimensional structure interface, the three-dimensional structure is a triangular prism, the side surface of the triangular prism is attached to the board surface, and the side edge of each triangular prism is adjacently arranged or the triangular prisms are arranged in a matrix with a preset distance;
or the three-dimensional structure is a quadrangular prism, the side surface of the quadrangular prism is attached to the plate surface, and the quadrangular prisms are arranged in a matrix with a preset distance.
Preferably, in the method for preparing the composite insulation board with the three-dimensional structure interface, the distance between the highest point of the three-dimensional structure and the board surface is greater than or equal to 5mm.
Preferably, the preparation method of the composite insulation board with the three-dimensional structure interface is characterized in that the insulation board is made of EPS, XPS or polyurethane.
Preferably, the preparation method of the composite insulation board with the three-dimensional structural interface comprises the steps of preparing a composite insulation board with the three-dimensional structural interface, wherein the cement mortar comprises cement, aggregate and a wave absorber;
the aggregate is at least one of expanded perlite, EPS (expandable polystyrene) balls, porous glass beads, hollow glass beads, sea sand, river sand or machine-made sand;
the wave absorber is at least one of graphite, carbon black, carbon fiber, graphene, nano manganese dioxide, ferrite powder, carbonyl iron powder, metal micro powder, silicon carbide and conductive polymer;
when the wave absorber is at least one of carbon black, carbon fiber and graphene, the wave absorber accounts for 1-5% of the mass of the cement mortar;
when the wave absorber is at least one of graphite, nano manganese dioxide, ferrite powder, carbonyl iron powder, metal micropowder, silicon carbide and conductive polymer, the wave absorber accounts for 10-50% of the mass of the cement mortar. Preferably, in the method for preparing the composite insulation board with the three-dimensional structure interface, a release agent is used for releasing the mold, and the release agent is Vaseline.
The aim of the invention and the technical problems are also achieved by adopting the following technical proposal. The composite insulation board with the three-dimensional structural interface is prepared by the method and comprises an insulation board and at least one mortar layer;
wherein, at least one side surface of the heat preservation plate is provided with a three-dimensional structure which is regularly arranged.
The aim and the technical problems of the invention can be further realized by adopting the following technical measures.
Preferably, the composite insulation board with the three-dimensional structure interface has a reflectivity lower than-15 dB at the frequency of 8-18GHz.
By means of the technical scheme, the composite insulation board with the three-dimensional structural interface and the preparation method thereof have at least the following advantages:
1) According to the invention, the propagation path of the incident electromagnetic wave is changed by designing the shape and the size of the three-dimensional structure interface, reflection and refraction can be formed between adjacent shapes, the propagation path is increased, the electromagnetic wave loss is increased, and the thickness and the cost of the material can be reduced under the condition of ensuring excellent wave absorbing performance by selecting proper height and angle of the three-dimensional structure interface shape;
2) According to the composite insulation board with the three-dimensional structure interface, the insulation board is used as a wave-transmitting layer, and the cement mortar layer is used as a wave-absorbing layer, so that the reflectivity is lower than-15 dB in the frequency range of 8-18GHz, and the minimum reflectivity can reach-35 dB; the composite insulation board with the three-dimensional structure interface has good wave absorbing performance and insulation performance;
3) The preparation method of the composite insulation board with the three-dimensional structure interface is simple, the precision is high, the mortar board has strong electromagnetic wave absorption and adjustable thickness, can replace other electromagnetic wave absorption building materials with large thickness and high cost, can be directly used as building components, and can reduce the thickness of the building materials and the cost of building construction.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a top view of the insulation board of example 1;
FIG. 2 is a side view of the insulation board of example 1;
FIG. 3 is a side view of a composite insulation board with three-dimensional structural interface of example 1;
FIG. 4 is a top view of the insulation board of example 2;
FIG. 5 is a side view of the insulation board of example 2;
FIG. 6 is a top view of the insulation board of example 3;
FIG. 7 is a top view of the insulation board of example 4.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following is a detailed description of the specific implementation, structure, characteristics and effects of the composite insulation board with three-dimensional structural interface and the preparation method thereof according to the invention with reference to the accompanying drawings and the preferred embodiment. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
The invention provides a preparation method of a composite insulation board with a three-dimensional structure interface, which comprises the following steps:
surrounding the heat-insulating board by a model frame, pouring cement mortar to prepare a mortar layer, trowelling, hardening and demolding to obtain the composite heat-insulating board with a three-dimensional structure interface; the mortar layer is one or more layers;
wherein, at least one side surface of the heat preservation plate is provided with a three-dimensional structure which is regularly arranged; the three-dimensional structure is pyramid, prism or cylinder.
Preferably, the three-dimensional structure is a pyramid, the bottom surface of the pyramid is attached to the plate surface, and the bottom edge of each pyramid is adjacently arranged or the pyramids are arranged in a matrix with a preset distance.
Preferably, the three-dimensional structure is a prism or a cylinder, the bottom surface of the prism or the cylinder is attached to the plate surface, and the prism or the cylinder is arranged in a matrix with a preset distance.
Preferably, the three-dimensional structure is a triangular prism, the side face of the triangular prism is attached to the board face, and the side face of each triangular prism is adjacently arranged or the triangular prisms are arranged in a matrix with a preset distance;
or the three-dimensional structure is a quadrangular prism, the side surface of the quadrangular prism is attached to the plate surface, and the quadrangular prisms are arranged in a matrix with a preset distance.
Preferably, the distance between the highest point of the three-dimensional structure and the plate surface is greater than or equal to 5mm.
The preferred materials of the insulation board are EPS, XPS or polyurethane.
Preferably, the cement mortar comprises cement, aggregate and a wave absorber;
the aggregate is at least one of expanded perlite, EPS (expandable polystyrene) balls, porous glass beads, hollow glass beads, sea sand, river sand or machine-made sand; preferably, the aggregate is sea sand, river sand or machine-made sand, and has better wave absorbing effect and mechanical strength.
The wave absorber is at least one of graphite, carbon black, carbon fiber, graphene, nano manganese dioxide, ferrite powder, carbonyl iron powder, metal micro powder, silicon carbide and conductive polymer;
when the wave absorber is at least one of carbon black, carbon fiber and graphene, the wave absorber accounts for 1-5% of the mass of the cement mortar;
when the wave absorber is at least one of graphite, nano manganese dioxide, ferrite powder, carbonyl iron powder, metal micro powder, silicon carbide and conductive polymer, the wave absorber accounts for 10-50% of the mass of the cement mortar.
The water-cement ratio is related to the kind and the blending amount of the aggregate and the wave absorber, and is usually more than 0.5.
Preferably, a release agent is used for releasing the mold, and the release agent is vaseline.
Another embodiment of the present invention provides a composite insulation board having a three-dimensional structural interface, prepared by the foregoing method, including an insulation board and at least one mortar layer;
wherein, at least one side surface of the heat preservation plate is provided with a three-dimensional structure which is regularly arranged. The three-dimensional structure is a pyramid, a prism or a cylinder.
The mortar layer is provided with a containing groove, and the three-dimensional structure of the heat preservation layer is contained, so that the mortar layer is attached to the board surface.
Wherein, the heated board is as wave-transparent layer, and the mortar layer is as wave-absorbing layer.
Preferably, the reflectivity of the composite insulation board with the three-dimensional structure interface is lower than-15 dB at the frequency of 8-18GHz.
Example 1
The invention provides a preparation method of a composite insulation board with a three-dimensional structure interface, which comprises the following steps:
1) Selecting an insulation board, wherein the whole size of the insulation board is 182mm multiplied by 21.3mm, the insulation board has triangular pyramid-shaped interface shapes with the bottom side length of 14.0mm and the height of 19.3mm, each shape is adjacently arranged with the contact surface of a base, the base is 2.0mm, and the top view and the side view of the insulation board are respectively shown in fig. 1 and 2;
2) Stirring cement mortar with a water cement ratio of 0.5, using P.O 52.5.5 cement and using closed-cell expanded perlite as aggregate, wherein the particle size of the expanded perlite is 1-2mm, and uniformly stirring in a planetary stirrer to obtain cement mortar; placing the heat-insulating plate in a steel frame with a bottom plate, the size of which is 182.2mm multiplied by 40mm, injecting a proper amount of stirred cement mortar, vibrating, trowelling, hardening and demoulding to obtain the composite heat-insulating plate with a three-dimensional structure interface.
As shown in fig. 3, another embodiment of the present invention provides a composite insulation board having a three-dimensional structural interface, which is prepared by the method of embodiment 1, and includes an insulation board 1 and a mortar layer 2; wherein, a triangular pyramid 3 which is regularly arranged is arranged on one side plate surface of the heat preservation plate 1.
The electromagnetic wave absorption performance of the composite insulation board with the three-dimensional structure interface of the embodiment 1 is tested by adopting an arc reflection method, so that the minimum reflectivity is minus 35dB, and the frequency range of the reflectivity lower than minus 15dB is 6.8-18GHz.
Example 2
The invention provides a preparation method of a composite insulation board with a three-dimensional structure interface, which comprises the following steps:
1) Selecting an insulation board, wherein the whole size of the insulation board is 182.0mm multiplied by 17.0mm, the bottom surface of the insulation board is parallel to the quadrangular prism-shaped interface shape of the surface of the board, the contact surface of a single shape and a base is 6.0mm multiplied by 6.0mm, the bottom edges of each shape are parallel and 6.0mm apart, the height is 15.0mm, the base is 2.0mm, and the top view and the side view of the insulation board are respectively shown in fig. 4 and 5;
2) Stirring cement mortar with a water cement ratio of 0.5, using P.O 52.5.5 cement and using closed-cell expanded perlite as aggregate, wherein the particle size of the expanded perlite is 1-2mm, and uniformly stirring in a planetary stirrer to obtain cement mortar; placing the heat-insulating plate in a steel frame with a bottom plate, the size of which is 182.2mm multiplied by 40mm, injecting a proper amount of stirred cement mortar, vibrating, trowelling, hardening and demoulding to obtain the composite heat-insulating plate with a three-dimensional structure interface.
Another embodiment of the present invention provides a composite insulation board having a three-dimensional structural interface, prepared by the method of embodiment 2, comprising an insulation board and a mortar layer; wherein, a square prism which is arranged regularly is arranged on one side surface of the heat insulation board.
The composite insulation board with the three-dimensional structure interface of the embodiment 2 is tested for electromagnetic wave absorption performance by adopting an arc reflection method, and when electromagnetic waves are incident in the vertical polarization direction, the minimum reflectivity is 36dB, and the frequency range of the reflectivity lower than 15dB is 5.3-18GHz.
Example 3
The invention provides a preparation method of a composite insulation board with a three-dimensional structure interface, which comprises the following steps:
1) Selecting an insulation board, wherein the whole size of the insulation board is 182.0mm multiplied by 33.3mm, the bottom side length is 22.8mm, the height is 31.3mm, the rectangular pyramid interface shapes are adjacently arranged on the contact surface of the base, and the base is 2.0mm;
2) Stirring cement mortar with a water cement ratio of 0.7, using P.O 52.5.5 cement and standard sand as aggregate, and uniformly stirring in a planetary stirrer to obtain cement mortar; placing the heat-insulating plate in a steel frame with a bottom plate, the size of which is 182.2mm multiplied by 40mm, injecting a proper amount of stirred cement mortar, vibrating, trowelling, hardening and demoulding to obtain the composite heat-insulating plate with a three-dimensional structure interface. A top view of the insulation board is shown in fig. 6.
Another embodiment of the present invention provides a composite insulation board having a three-dimensional structural interface, prepared by the method of embodiment 3, comprising an insulation board and a mortar layer; wherein, a square pyramid which is arranged regularly is arranged on one side surface of the heat insulation board.
The electromagnetic wave absorption performance of the composite insulation board with the three-dimensional structure interface of the embodiment 3 is tested by adopting an arc reflection method, so that the minimum reflectivity is 40dB, and the frequency range of the reflectivity lower than 15dB is 3.8-18GHz.
Example 4
The invention provides a preparation method of a composite insulation board with a three-dimensional structure interface, which comprises the following steps:
1) Selecting an insulation board, wherein the integral size of the insulation board is 182.0mm multiplied by 21.3mm, the bottom side length is 14.8mm, the height is 19.3mm, the six pyramid-shaped interface shapes are adjacently arranged on the contact surface of the base, and the base is 2.0mm;
2) Stirring cement mortar with a water cement ratio of 0.5, using P.O 52.5.5 cement and using closed-cell expanded perlite as a second aggregate, wherein the particle size range of the expanded perlite is 1-2mm, and uniformly stirring in a planetary stirrer to obtain cement mortar; placing the heat-insulating plate in a steel frame with a bottom plate, the size of which is 182.2mm multiplied by 40mm, injecting a proper amount of stirred cement mortar, vibrating, trowelling, hardening and demoulding to obtain the composite heat-insulating plate with a three-dimensional structure interface. A top view of the insulation board is shown in fig. 7.
Another embodiment of the present invention provides a composite insulation board having a three-dimensional structural interface, prepared by the method of embodiment 4, comprising an insulation board and a mortar layer; wherein, a regular hexagonal pyramid is arranged on the surface of one side of the heat insulation board.
The electromagnetic wave absorption performance of the composite insulation board with the three-dimensional structure interface of the embodiment 4 is tested by adopting an arc reflection method, so that the minimum reflectivity is minus 30dB, and the frequency range of the reflectivity lower than minus 10dB is 5.1-18GHz.
Example 5
The invention provides a preparation method of a composite insulation board with a three-dimensional structure interface, which comprises the following steps:
1) Selecting an insulation board, wherein the integral size of the insulation board is 182.0mm multiplied by 30.0mm, the contact surface of a single shape and a base is 14.0mm multiplied by 182.0mm, the contact surface of each shape and the base is adjacently arranged on a long side, the height is 19.3mm, and the base is 2.0mm;
2) Stirring P.O 52.5.5 cement and closed-cell expanded perlite according to a water-cement ratio of 0.5, wherein the particle size range of the expanded perlite is 1-2mm, and uniformly stirring in a planetary stirrer to obtain first cement mortar; placing the heat-insulating plate in a steel frame with a bottom plate, wherein the size of the steel frame is 182.2mm multiplied by 40mm, coating with a proper amount of vaseline, injecting a proper amount of stirred first cement mortar, vibrating, trowelling, hardening, and demoulding to obtain a blank plate;
3) Stirring P.O 52.5.5 cement and standard sand according to a water-cement ratio of 0.45, and uniformly stirring in a planetary stirrer to obtain second cement mortar; placing the blank plate into a steel frame with a bottom plate, the size of which is 182.2mm multiplied by 40mm, injecting a proper amount of well-stirred second cement mortar, vibrating, trowelling, hardening, and demolding to obtain the composite heat-insulating plate with the three-dimensional structure interface.
Another embodiment of the present invention provides a composite insulation board having a three-dimensional structural interface, prepared by the method of embodiment 5, which sequentially includes an insulation board, a first mortar layer, and a second mortar layer; wherein, a triangular prism which is arranged regularly is arranged on one side surface of the heat insulation board.
The composite insulation board with the three-dimensional structure interface of the embodiment 5 is tested for electromagnetic wave absorption performance by adopting an arc reflection method, and when electromagnetic waves are incident in the vertical polarization direction, the minimum reflectivity is-38 dB, and the frequency range of the reflectivity lower than-15 dB is 4.0-18GHz.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, but any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (8)
1. The preparation method of the composite insulation board with the three-dimensional structure interface is characterized by comprising the following steps:
surrounding the heat-insulating board by a model frame, pouring cement mortar to prepare a mortar layer, trowelling, hardening and demolding to obtain the composite heat-insulating board with a three-dimensional structure interface; the mortar layer is one or more layers; the heat insulation board is used as a wave-transmitting layer, and the mortar layer is used as a wave-absorbing layer;
wherein, a side plate surface of the heat preservation plate is provided with a three-dimensional structure which is regularly arranged; the mortar layer accommodates the three-dimensional structure of the heat-insulating board, so that the mortar layer is attached to the board surface of the heat-insulating board; the three-dimensional structure is a pyramid, the bottom surface of the pyramid is attached to the plate surface, and the bottom edge of each pyramid is adjacently arranged or the pyramids are arranged in a matrix with a preset distance; or, the three-dimensional structure is a prism or a cylinder, the bottom surface of the prism or the cylinder is attached to the plate surface, and the prisms or the cylinders are arranged in a matrix with a preset distance.
2. The method for preparing the composite insulation board with the three-dimensional structure interface according to claim 1, wherein the three-dimensional structure is a triangular prism, the side face of the triangular prism is attached to the board face, and the side face of each triangular prism is adjacently arranged or the triangular prisms are arranged in a matrix with a preset distance;
or the three-dimensional structure is a quadrangular prism, the side surface of the quadrangular prism is attached to the plate surface, and the quadrangular prisms are arranged in a matrix with a preset distance.
3. The method for preparing the composite insulation board with the three-dimensional structure interface according to claim 1, wherein the distance between the highest point of the three-dimensional structure and the board surface is more than or equal to 5mm.
4. The method for preparing the composite insulation board with the three-dimensional structure interface according to claim 1, wherein the insulation board is made of EPS, XPS or polyurethane.
5. The method for preparing the composite insulation board with the three-dimensional structural interface according to claim 1, wherein the cement mortar comprises cement, aggregate and a wave absorber;
the aggregate is at least one of expanded perlite, EPS (expandable polystyrene) balls, porous glass beads, hollow glass beads, sea sand, river sand or machine-made sand;
the wave absorber is at least one of graphite, carbon black, carbon fiber, graphene, nano manganese dioxide, ferrite powder, carbonyl iron powder, metal micro powder, silicon carbide and conductive polymer;
when the wave absorber is at least one of carbon black, carbon fiber and graphene, the wave absorber accounts for 1-5% of the mass of the cement mortar;
when the wave absorber is at least one of graphite, nano manganese dioxide, ferrite powder, carbonyl iron powder, metal micropowder, silicon carbide and conductive polymer, the wave absorber accounts for 10-50% of the mass of the cement mortar.
6. The method for preparing the composite insulation board with the three-dimensional structure interface according to claim 1, wherein the demolding agent is Vaseline.
7. A composite insulation board with a three-dimensional structural interface, characterized in that it is prepared by the method of any one of claims 1-6, comprising an insulation board and at least one mortar layer;
wherein, at least one side surface of the heat preservation plate is provided with a three-dimensional structure which is regularly arranged.
8. The composite insulation board with three-dimensional structure interface according to claim 7, wherein the reflectivity of the composite insulation board with three-dimensional structure interface is lower than-15 dB at 8-18GHz frequency.
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| IT202000008827A1 (en) * | 2020-04-23 | 2021-10-23 | M I T Srl | SHIELDING DEVICES AGAINST ELECTROMAGNETIC WAVES, USED IN INDUSTRIAL APPLICATIONS OF DIFFERENT KINDS, AND IN PARTICULAR TILES ABSORBING ELECTROMAGNETIC WAVES |
| CN112266219B (en) * | 2020-10-15 | 2022-06-03 | 新化县东泰特种耐火材料有限公司 | Preparation method of energy-saving plate for building |
| CN114853427A (en) * | 2022-06-13 | 2022-08-05 | 诸暨市幄肯中智新材料有限公司 | Enhanced polymer ball filled light composite material and preparation method thereof |
| CN115448662A (en) * | 2022-09-08 | 2022-12-09 | 中国建筑材料科学研究总院有限公司 | Multi-scale scattering structure cement-based wave absorber and preparation method thereof |
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