CN113105175A - Cement-based wave-absorbing material and preparation method thereof - Google Patents
Cement-based wave-absorbing material and preparation method thereof Download PDFInfo
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- CN113105175A CN113105175A CN202110377584.4A CN202110377584A CN113105175A CN 113105175 A CN113105175 A CN 113105175A CN 202110377584 A CN202110377584 A CN 202110377584A CN 113105175 A CN113105175 A CN 113105175A
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- 239000004568 cement Substances 0.000 title claims abstract description 157
- 239000011358 absorbing material Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000835 fiber Substances 0.000 claims abstract description 66
- 239000004576 sand Substances 0.000 claims abstract description 50
- 239000006096 absorbing agent Substances 0.000 claims abstract description 42
- 239000004567 concrete Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000011159 matrix material Substances 0.000 claims abstract description 25
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 4
- 238000010923 batch production Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 21
- 239000011398 Portland cement Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 10
- 239000002893 slag Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 241000282414 Homo sapiens Species 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011401 Portland-fly ash cement Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000011404 masonry cement Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 210000000748 cardiovascular system Anatomy 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 210000003169 central nervous system Anatomy 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
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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
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/48—Metal
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a cement-based wave-absorbing material and a preparation method thereof, wherein the cement-based wave-absorbing material comprises a matrix and a wave-absorbing reinforcing phase, and the wave-absorbing reinforcing phase is embedded in the matrix; the matrix is concrete composed of cement, sand and water, and the wave-absorbing reinforcing phase is a spiral fiber wave-absorbing body; the cement-based wave-absorbing material comprises, by mass, 10-30 parts of cement, 20-55 parts of sand, 10-20 parts of water and 1-10 parts of a spiral fiber wave absorber; the preparation method comprises the steps of batching, preparing concrete, arranging the spiral fiber wave absorbing body, molding the concrete in a mold and the like. According to the invention, the spiral fiber wave absorbing body is embedded in the concrete matrix, so that the cement-based wave absorbing material is low in cost, wide in absorbing frequency band and excellent in mechanical property. The preparation method of the cement-based wave-absorbing material adopts a conventional process of civil engineering, is simple to operate, has no special requirements on operators, and is suitable for batch production.
Description
Technical Field
The invention relates to the cross technical field of electromagnetism and material science, in particular to a cement-based wave-absorbing material and a preparation method thereof.
Background
Along with the progress of science and technology, radio technology has been widely applied to various fields such as national defense, industrial and agricultural production, transportation, medicine, communication, information industry, civil electric and electronic appliances, and the like. With the continuous development of electronic technology, electromagnetic waves are widely used in various fields as carriers of information, the influence of electromagnetic wave radiation on human bodies and the environment is increasing, and electromagnetic wave pollution becomes the fourth public nuisance threatening the survival of human beings. Electromagnetic interference generated by electromagnetic wave radiation not only affects the normal operation of various electronic devices, but also has different degrees of harm to the central nervous system, blood and cardiovascular system, reproductive system and immune system of human body.
The cement-based material has the advantages of good formability, high strength, low manufacturing cost, good durability and the like, and is a large quantity of building materials commonly adopted in engineering construction for a long time. With the increasingly worsening of electromagnetic environment, the development and use of cement-based wave-absorbing materials with electromagnetic protection function are more and more urgent. The cement-based wave-absorbing material can absorb and attenuate incident electromagnetic waves and convert the electromagnetic energy into heat energy to be dissipated or eliminate the electromagnetic waves due to interference. Therefore, the research on how to enable the building to have the electromagnetic wave absorption function has practical significance.
At present, the existing cement-based wave-absorbing material cannot completely meet the timing requirements of engineering application due to the defects of high cost, narrow absorption frequency band, poor mechanical property and the like.
Disclosure of Invention
The invention provides a cement-based wave-absorbing material and a preparation method thereof, which are used for overcoming the defects of high cost, narrow absorption frequency band, poor mechanical property and the like in the prior art.
In order to achieve the purpose, the invention provides a cement-based wave-absorbing material which comprises a matrix and a wave-absorbing reinforcing phase, wherein the wave-absorbing reinforcing phase is embedded in the matrix; the matrix is concrete composed of cement, sand and water, and the wave-absorbing reinforcing phase is a spiral fiber wave-absorbing body;
the cement-based wave-absorbing material comprises, by mass, 10-30 parts of cement, 20-55 parts of sand, 10-20 parts of water and 1-10 parts of a spiral fiber wave absorber.
In order to achieve the purpose, the invention also provides a preparation method of the cement-based wave-absorbing material, which comprises the following steps:
s1: weighing 10-30 parts of cement, 20-55 parts of sand, 10-20 parts of water and 1-10 parts of a spiral fiber wave absorber according to the mass parts;
s2: uniformly stirring cement and sand, adding water, and uniformly stirring to form concrete;
s3: selecting a cement forming die with the height larger than the outer diameter of the spiral fiber wave absorbing body, and irregularly arranging the spiral fiber wave absorbing body in the cement forming die;
s4: pouring the concrete into a cement forming mold with a spiral fiber wave absorber, then leveling the surface of the concrete, and standing to obtain a cement board;
s5: and carrying out conventional maintenance and demolding on the cement board to obtain the cement-based wave-absorbing material.
Compared with the prior art, the invention has the beneficial effects that:
1. the cement-based wave-absorbing material provided by the invention comprises a matrix and a wave-absorbing reinforcing phase, wherein the wave-absorbing reinforcing phase is embedded in the matrix; the matrix is concrete composed of cement, sand and water, and the wave-absorbing reinforcing phase is a spiral fiber wave-absorbing body; the cement-based wave-absorbing material comprises, by mass, 10-30 parts of cement, 20-55 parts of sand, 10-20 parts of water and 1-10 parts of a spiral fiber wave absorber. The spiral fiber wave absorber has wave absorbing and reinforcing functions, and the cement-based wave absorbing material has a strong wave absorbing function, does not destroy the original mechanical property of a cement base, and can reinforce the mechanical property of the cement base by embedding the spiral fiber wave absorber in the concrete base.
2. The cement-based wave-absorbing material provided by the invention has strong absorption capacity for 1-18 GHz electromagnetic waves and has the characteristic of strong broadband absorption.
3. The cement-based wave-absorbing material provided by the invention does not need to add an absorbent which is expensive, complex in process and influences the mechanical property of the product, and the adopted raw materials are all conventional and universal materials for civil engineering, so that the cost is low and the material is easy to obtain.
4. The preparation method of the cement-based wave-absorbing material adopts a conventional process of civil engineering, is simple to operate, has no special requirements on operators, is suitable for batch production, and has the advantages of low cost, wide absorption frequency band and excellent mechanical property.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of a spiral-type fiber absorber forming die used in example 1;
FIG. 2 is the arrangement of the spiral fiber absorber in the cement forming mold in example 1;
FIG. 3 is a photograph of the cement-based wave-absorbing material prepared in example 1;
FIG. 4 is a graph showing the absorption efficiency of the cement-based wave-absorbing material prepared in example 1 for electromagnetic waves with a frequency of 1-18 GHz;
FIG. 5 is a graph showing the absorption efficiency of the cement-based wave-absorbing material prepared in example 2 for electromagnetic waves with a frequency of 1-18 GHz;
FIG. 6 is a graph showing the absorption efficiency of the cement-based wave-absorbing material prepared in example 3 for electromagnetic waves with a frequency of 1-18 GHz.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The drugs/reagents used are all commercially available without specific mention.
The invention provides a cement-based wave-absorbing material which comprises a matrix and a wave-absorbing reinforcing phase, wherein the wave-absorbing reinforcing phase is embedded in the matrix; the matrix is concrete composed of cement, sand and water, and the wave-absorbing reinforcing phase is a spiral fiber wave-absorbing body;
the cement-based wave-absorbing material comprises, by mass, 10-30 parts of cement, 20-55 parts of sand, 10-20 parts of water and 1-10 parts of a spiral fiber wave absorber.
Preferably, the cement is one of general purpose cement, special purpose cement and special purpose cement.
Such as: ordinary portland cement, portland slag cement, portland pozzolana cement, portland fly ash cement, composite portland cement, moderate-heat portland cement, low-heat portland slag cement, rapid-hardening portland cement, sulfate-resistant portland cement, white portland cement, portland road cement, masonry cement, oil well cement, and gypsum slag cement.
Preferably, the sand is at least one of extra fine sand, medium sand and coarse sand.
Preferably, the spiral fiber absorber is formed by winding a common metal binding wire on a binding wire forming die.
Preferably, the specification of the common metal binder is at least one of 8#, 10#, 12#, 14#, 16#, 18#, 20# and 22 #.
Preferably, the screw pitch of the spiral fiber wave absorber is 1-100 mm, and the outer diameter of the spiral fiber wave absorber is smaller than the thickness of the cement-based wave absorbing material; the spiral fiber wave absorber is completely positioned in the concrete.
The outer diameter of the spiral fiber wave absorber is determined according to the thickness of the cement-based wave absorbing material required actually.
The invention also provides a preparation method of the cement-based wave-absorbing material, which is characterized by comprising the following steps of:
s1: weighing 10-30 parts of cement, 20-55 parts of sand, 10-20 parts of water and 1-10 parts of a spiral fiber wave absorber according to the mass parts;
s2: uniformly stirring cement and sand, adding water, and uniformly stirring to form concrete;
s3: selecting a cement forming die with the height larger than the outer diameter of the spiral fiber wave absorbing body, and irregularly arranging the spiral fiber wave absorbing body in the cement forming die;
s4: pouring the concrete into a cement forming mold with a spiral fiber wave absorber, then leveling the surface of the concrete, and standing to obtain a cement board;
s5: and carrying out conventional maintenance and demolding on the cement board to obtain the cement-based wave-absorbing material.
Preferably, the cement is one of general purpose cement, special purpose cement and special purpose cement.
Such as: ordinary portland cement, portland slag cement, portland pozzolana cement, portland fly ash cement, composite portland cement, moderate-heat portland cement, low-heat portland slag cement, rapid-hardening portland cement, sulfate-resistant portland cement, white portland cement, portland road cement, masonry cement, oil well cement, and gypsum slag cement.
The sand is at least one of extra-fine sand, medium sand and coarse sand.
Preferably, the spiral fiber wave absorber is formed by winding a common metal binding wire on a binding wire forming die, and specifically comprises:
one end of a common metal binding wire is fixed on a binding wire forming die (shown in figure 1), then the common metal binding wire is wound along a spiral groove on the binding wire forming die, and demoulding is carried out to obtain the spiral fiber wave absorber.
Preferably, the specification of the common metal binding wire is at least one of 8#, 10#, 12#, 14#, 16#, 18#, 20# and 22 #;
the screw pitch of the spiral fiber wave absorber is 1-100 mm, and the outer diameter of the spiral fiber wave absorber is smaller than the thickness of the cement-based wave absorbing material; the spiral fiber wave absorber is completely positioned in the concrete.
The outer diameter of the spiral fiber wave absorber is determined according to the thickness of the cement-based wave absorbing material required actually.
Example 1
The embodiment provides a cement-based wave-absorbing material, which comprises a matrix and a wave-absorbing reinforcing phase, wherein the wave-absorbing reinforcing phase is embedded in the matrix; the matrix is concrete composed of cement (common portland cement in general cement), sand (extra fine sand, medium sand and coarse sand) and water, and the wave-absorbing reinforcing phase is a spiral fiber wave-absorbing body (specification is 8#, thread pitch is 13mm, and external diameter of spiral is 15 cm);
the cement-based wave-absorbing material comprises, by mass, 26 parts of cement, 53 parts of sand, 19 parts of water and 2 parts of a spiral fiber wave-absorbing body.
The embodiment also provides a preparation method of the cement-based wave-absorbing material, which comprises the following steps:
s1: weighing raw materials according to the mass ratio of 26 parts of cement, 53 parts of sand, 19 parts of water and 2 parts of spiral fiber wave absorber;
s2: uniformly stirring cement and sand, adding water, and uniformly stirring to form concrete;
s3: selecting a cement forming die with the height larger than the outer diameter of the spiral fiber wave absorbing body, and irregularly arranging the spiral fiber wave absorbing body in the cement forming die, as shown in figure 2;
s4: pouring the concrete into a cement forming mold with a spiral fiber wave absorber, then leveling the surface of the concrete, and standing to obtain a cement board;
s5: and (3) performing conventional maintenance and demolding on the cement board to obtain the cement-based wave-absorbing material, as shown in figure 3.
The graph of the absorption efficiency curve of the cement-based wave-absorbing material prepared in the embodiment on electromagnetic waves with the frequency of 1-18 GHz is shown in FIG. 4, and it can be known that the cement-based wave-absorbing material prepared in the embodiment has a good radar wave absorption effect in a wide frequency band of 1-18 GHz, the full-band radar wave absorption effect is below-6 dB, and the extreme value reaches-26 dB; wherein the absorption effect of 4-18 GHz radar waves is below-8 dB.
Example 2
The embodiment provides a cement-based wave-absorbing material, which comprises a matrix and a wave-absorbing reinforcing phase, wherein the wave-absorbing reinforcing phase is embedded in the matrix; the matrix is concrete composed of cement (slag portland cement in general cement), sand (fine sand and medium sand) and water, and the wave-absorbing reinforcing phase is a spiral fiber wave-absorbing body (specification is 10#, thread pitch is 13mm, and the external diameter of the spiral is 15 cm);
the cement-based wave-absorbing material comprises, by mass, 25 parts of cement, 53 parts of sand, 19.5 parts of water and 2.5 parts of a spiral fiber wave absorber.
The embodiment also provides a preparation method of the cement-based wave-absorbing material, which comprises the following steps:
s1: weighing 25 parts of cement, 53 parts of sand, 19.5 parts of water and 2.5 parts of a spiral fiber wave absorber according to the mass part ratio;
s2: uniformly stirring cement and sand, adding water, and uniformly stirring to form concrete;
s3: selecting a cement forming die with the height larger than the outer diameter of the spiral fiber wave absorbing body, and irregularly arranging the spiral fiber wave absorbing body in the cement forming die;
s4: pouring the concrete into a cement forming mold with a spiral fiber wave absorber, then leveling the surface of the concrete, and standing to obtain a cement board;
s5: and carrying out conventional maintenance and demolding on the cement board to obtain the cement-based wave-absorbing material.
The graph of the absorption efficiency curve of the cement-based wave-absorbing material prepared in the embodiment on electromagnetic waves with the frequency of 1-18 GHz is shown in FIG. 5, and it can be known that the cement-based wave-absorbing material prepared in the embodiment has a good radar wave absorption effect in a wide frequency band of 1-18 GHz, the full-band radar wave absorption effect is below-6 dB, and the extreme value reaches-33 dB; wherein the absorption effect of 4-18 GHz radar waves is below-8 dB.
Example 3
The embodiment provides a cement-based wave-absorbing material, which comprises a matrix and a wave-absorbing reinforcing phase, wherein the wave-absorbing reinforcing phase is embedded in the matrix; the matrix is concrete composed of cement (composite portland cement in general cement), sand (medium sand) and water, and the wave-absorbing reinforcing phase is a spiral fiber wave-absorbing body (specification is 18#, thread pitch is 13mm, and outer diameter of spiral is 15 cm);
the cement-based wave-absorbing material comprises, by mass, 24 parts of cement, 50 parts of sand, 18 parts of water and 8 parts of a spiral fiber wave-absorbing body.
The embodiment also provides a preparation method of the cement-based wave-absorbing material, which comprises the following steps:
s1: weighing 24 parts of cement, 50 parts of sand, 18 parts of water and 8 parts of spiral fiber wave absorber according to the mass parts;
s2: uniformly stirring cement and sand, adding water, and uniformly stirring to form concrete;
s3: selecting a cement forming die with the height larger than the outer diameter of the spiral fiber wave absorbing body, and irregularly arranging the spiral fiber wave absorbing body in the cement forming die;
s4: pouring the concrete into a cement forming mold with a spiral fiber wave absorber, then leveling the surface of the concrete, and standing to obtain a cement board;
s5: and carrying out conventional maintenance and demolding on the cement board to obtain the cement-based wave-absorbing material.
The graph of the absorption efficiency curve of the cement-based wave-absorbing material prepared in the embodiment on electromagnetic waves with the frequency of 1-18 GHz is shown in FIG. 6, and it can be known that the cement-based wave-absorbing material prepared in the embodiment has a good radar wave absorption effect in a wide frequency band of 1-18 GHz, the full-band radar wave absorption effect is below-6 dB, and the extreme value reaches-37 dB; wherein the absorption effect of 4-18 GHz radar waves is below-8 dB.
By combining 3 embodiments, the cement-based wave-absorbing material disclosed by the invention has an efficient and stable effect of absorbing radar waves in a wide frequency band, and is slightly influenced by materials and processes.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The cement-based wave-absorbing material is characterized by comprising a matrix and a wave-absorbing reinforcing phase, wherein the wave-absorbing reinforcing phase is embedded in the matrix; the matrix is concrete composed of cement, sand and water, and the wave-absorbing reinforcing phase is a spiral fiber wave-absorbing body;
the cement-based wave-absorbing material comprises, by mass, 10-30 parts of cement, 20-55 parts of sand, 10-20 parts of water and 1-10 parts of a spiral fiber wave absorber.
2. The cement-based wave absorbing material of claim 1, wherein the cement is one of general purpose cement, special purpose cement and special purpose cement.
3. The cement-based wave absorbing material of claim 1, wherein the sand is at least one of extra fine sand, medium sand and coarse sand.
4. The cement-based wave absorbing material of claim 1 wherein the helical fiber absorber is formed from a common metal binding wire by winding on a binding wire forming die.
5. The cement-based wave absorbing material of claim 4, wherein the gauge of the common metal binding wire is at least one of 8#, 10#, 12#, 14#, 16#, 18#, 20# and 22 #.
6. The cement-based wave-absorbing material of claim 1 or 4, wherein the screw pitch of the spiral fiber wave absorber is 1-100 mm, and the outer diameter of the spiral fiber wave absorber is smaller than the thickness of the cement-based wave-absorbing material; the spiral fiber wave absorber is completely positioned in the concrete.
7. The preparation method of the cement-based wave-absorbing material is characterized by comprising the following steps of:
s1: weighing 10-30 parts of cement, 20-55 parts of sand, 10-20 parts of water and 1-10 parts of a spiral fiber wave absorber according to the mass parts;
s2: uniformly stirring cement and sand, adding water, and uniformly stirring to form concrete;
s3: selecting a cement forming die with the height larger than the outer diameter of the spiral fiber wave absorbing body, and irregularly arranging the spiral fiber wave absorbing body in the cement forming die;
s4: pouring the concrete into a cement forming mold with a spiral fiber wave absorber, then leveling the surface of the concrete, and standing to obtain a cement board;
s5: and carrying out conventional maintenance and demolding on the cement board to obtain the cement-based wave-absorbing material.
8. The method of claim 7, wherein the cement is one of general purpose cement, special purpose cement, and special purpose cement;
the sand is at least one of extra-fine sand, medium sand and coarse sand.
9. The method according to claim 7, wherein the spiral fiber absorber is formed by winding a common metal binding wire on a binding wire forming die, specifically:
fixing one end of a common metal binding wire on a binding wire forming die, then winding the common metal binding wire along a spiral groove on the binding wire forming die, and demoulding to obtain the spiral fiber wave absorber.
10. The method of claim 7, wherein the gauge of the common metal binder is at least one of 8#, 10#, 12#, 14#, 16#, 18#, 20# and 22 #;
the screw pitch of the spiral fiber wave absorber is 1-100 mm, and the outer diameter of the spiral fiber wave absorber is smaller than the thickness of the cement-based wave absorbing material; the spiral fiber wave absorber is completely positioned in the concrete.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002030620A (en) * | 2000-07-14 | 2002-01-31 | East Japan Railway Co | Sound absorbing structure of concrete structure and construction method |
| CN108424079A (en) * | 2018-04-17 | 2018-08-21 | 中山市武汉理工大学先进工程技术研究院 | A kind of cement-based absorption material adding coiled carbon fibers |
| CN108439901A (en) * | 2018-04-17 | 2018-08-24 | 中山市武汉理工大学先进工程技术研究院 | A kind of cement-based absorption material preparation method adding coiled carbon fibers |
-
2021
- 2021-04-08 CN CN202110377584.4A patent/CN113105175A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002030620A (en) * | 2000-07-14 | 2002-01-31 | East Japan Railway Co | Sound absorbing structure of concrete structure and construction method |
| CN108424079A (en) * | 2018-04-17 | 2018-08-21 | 中山市武汉理工大学先进工程技术研究院 | A kind of cement-based absorption material adding coiled carbon fibers |
| CN108439901A (en) * | 2018-04-17 | 2018-08-24 | 中山市武汉理工大学先进工程技术研究院 | A kind of cement-based absorption material preparation method adding coiled carbon fibers |
Non-Patent Citations (1)
| Title |
|---|
| 车剑飞: "《复合材料及其工程应用》", 31 August 2006 * |
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