CN113550243A - Combined road sound insulation screen and preparation method thereof - Google Patents
Combined road sound insulation screen and preparation method thereof Download PDFInfo
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- CN113550243A CN113550243A CN202110844344.0A CN202110844344A CN113550243A CN 113550243 A CN113550243 A CN 113550243A CN 202110844344 A CN202110844344 A CN 202110844344A CN 113550243 A CN113550243 A CN 113550243A
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- 238000002360 preparation method Methods 0.000 title abstract description 13
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- 238000011049 filling Methods 0.000 claims abstract description 32
- 239000004568 cement Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- 239000002131 composite material Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 20
- 239000011575 calcium Substances 0.000 claims description 18
- 229910052791 calcium Inorganic materials 0.000 claims description 18
- 239000000395 magnesium oxide Substances 0.000 claims description 14
- LWNCNSOPVUCKJL-UHFFFAOYSA-N [Mg].[P] Chemical compound [Mg].[P] LWNCNSOPVUCKJL-UHFFFAOYSA-N 0.000 claims description 11
- 230000004888 barrier function Effects 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 8
- 229910019142 PO4 Inorganic materials 0.000 claims description 8
- 229910052796 boron Inorganic materials 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000004816 latex Substances 0.000 claims description 8
- 229920000126 latex Polymers 0.000 claims description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 8
- 239000010452 phosphate Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- -1 ammonium fluoroborate Chemical compound 0.000 claims description 7
- 229920003086 cellulose ether Polymers 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 7
- 239000010440 gypsum Substances 0.000 claims description 7
- 229910052602 gypsum Inorganic materials 0.000 claims description 7
- 239000011325 microbead Substances 0.000 claims description 7
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- 229910021487 silica fume Inorganic materials 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
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- 238000001125 extrusion Methods 0.000 claims description 4
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- 235000010339 sodium tetraborate Nutrition 0.000 claims description 4
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- 238000002156 mixing Methods 0.000 claims description 3
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- 238000005303 weighing Methods 0.000 claims description 3
- QBLDFAIABQKINO-UHFFFAOYSA-N barium borate Chemical compound [Ba+2].[O-]B=O.[O-]B=O QBLDFAIABQKINO-UHFFFAOYSA-N 0.000 claims description 2
- 229910021538 borax Inorganic materials 0.000 claims description 2
- CDMADVZSLOHIFP-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane;decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 CDMADVZSLOHIFP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002923 metal particle Substances 0.000 claims description 2
- 239000004328 sodium tetraborate Substances 0.000 claims description 2
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 2
- 239000011518 fibre cement Substances 0.000 claims 2
- 239000010879 coal refuse Substances 0.000 claims 1
- 238000007569 slipcasting Methods 0.000 claims 1
- 238000005187 foaming Methods 0.000 abstract description 19
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- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 13
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- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 8
- 239000011398 Portland cement Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 239000011381 foam concrete Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 3
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 3
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- 230000006835 compression Effects 0.000 description 3
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- 239000000945 filler Substances 0.000 description 3
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- 239000011491 glass wool Substances 0.000 description 3
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- 230000030279 gene silencing Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 description 2
- 239000004137 magnesium phosphate Substances 0.000 description 2
- 229960002261 magnesium phosphate Drugs 0.000 description 2
- 229910000157 magnesium phosphate Inorganic materials 0.000 description 2
- 235000010994 magnesium phosphates Nutrition 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
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- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
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- 239000000047 product Substances 0.000 description 1
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0017—Plate-like elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
- B28B1/525—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement containing organic fibres, e.g. wood fibres
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- 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
- C04B28/34—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 cold phosphate binders
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
- E01F8/0064—Perforated plate or mesh, e.g. as wall facing
- E01F8/007—Perforated plate or mesh, e.g. as wall facing with damping material
-
- 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
- C04B2111/40—Porous or lightweight 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
- C04B2111/52—Sound-insulating materials
Abstract
The invention discloses a combined road sound-proof screen and a preparation method thereof, belonging to the technical field of sound-proof screensThe cavity structure is provided with a sound insulation filling body. The sound insulation screen shell is made of a fiber cement-based material, and the sound insulation filling body is a composite curing body prepared by pouring foaming metal aggregate and a quick-hardening cementing material, so that the sound insulation screen shell has excellent volume stability and weather resistance, and the problem of poor weather resistance of the existing sound insulation screen is effectively solved; the sound insulation effect of the sound insulation screen is more than or equal to 30dB, and the surface density is less than or equal to 65kg/m2And an assembly type combined assembly structure is adopted, so that the construction can be completed quickly and efficiently, the assembly and disassembly are convenient, and the cyclic utilization can be realized.
Description
Technical Field
The invention relates to the technical field of sound insulation screens, in particular to a combined road sound insulation screen and a preparation method thereof.
Background
With the rapid development of traffic facilities such as railways, highways and the like in China, the problem of traffic noise influence on residents along the line is increasingly prominent, and the adoption of the sound barrier technology to reduce traffic noise becomes an important way to relieve traffic noise pollution.
At present, most of traffic major roads such as urban elevated roads, viaducts, railways and the like adopt sound-proof screens made of materials such as open plastic boards, glass sound-proof screens, glass wool/mineral wool and the like. The peak frequency of the sound absorption rate of the open plastic plate is mainly about 1500Hz, but the audio frequency range of common road noise is mainly below 600Hz, so that the sound absorption capacity is poor; the sound insulation glass has good light transmission, but the sound insulation effect is generally about 5dB, and the sound insulation effect is poor; the sound insulation effect of the materials such as the glass wool/the slag wool is about 10dB generally, the materials are easy to absorb water in rainy days, the sound insulation effect after water absorption is greatly reduced, the weather resistance of the materials is poor, and the aging phenomenon is easy to occur under the action of multiple factors such as alternation of dryness and humidity, cold and hot intersection and the like in the natural environment of the plastic plate, the glass wool and the like. Therefore, it is urgently needed to develop a recyclable combined road sound-insulating screen with good sound-insulating effect, convenient and efficient installation and good weather resistance.
Disclosure of Invention
Aiming at the defects, the invention aims to provide a combined road sound-proof screen and a preparation method thereof, which can effectively solve the problems of poor sound-proof effect, poor weather resistance and complex installation of the existing sound-proof screen.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a combined type road sound-proof screen which comprises a sound-proof screen shell, wherein a sound deadening hole is formed in one surface of the sound-proof screen shell, a solid plate is arranged on the other surface of the sound-proof screen shell, a cavity structure is arranged in the sound-proof screen shell, and a sound-proof filling body is arranged in the cavity structure.
Further, the sound insulation screen shell is a fiber cement-based large cavity plate which is prepared from a fiber cement-based material through grouting and extrusion.
Further, the fiber cement-based material comprises the following components in parts by mass: 50-70 parts of gypsum slag cement, 5-15 parts of silica fume, 5-15 parts of micro-beads, 1-6 parts of dispersible latex powder, 0.5-2 parts of organic fiber, 0.5-2.0 parts of polycarboxylic acid water reducing agent and 10-30 parts of water.
Further, the fiber cement-based material comprises the following components in parts by mass: 60 parts of gypsum slag cement, 10 parts of silica fume, 10 parts of microbeads, 4 parts of dispersible latex powder, 1 part of organic fibers, 1 part of polycarboxylic acid water reducing agent and 20 parts of water.
Further, the organic fiber is at least one of polypropylene fiber, polypropylene alcohol fiber, polyether fiber, aromatic polyamide fiber, polyvinyl alcohol fiber, polyacrylonitrile fiber and polyethylene fiber.
Furthermore, the hollow rate in the sound insulation screen shell is more than or equal to 70 percent.
Further, the sound insulation filling body is a composite solidified body which is made of foaming metal aggregate, quick-hardening cementing material and water through pouring.
Furthermore, the mass ratio of the foamed metal aggregate to the quick-hardening binding material to the water is 8-15: 6-15: 1, and preferably 10:6: 1.
Further, the foamed metal aggregate is foamed metal particles, such as one or more of foamed aluminum particles, foamed nickel particles and the like; wherein the particle size is not more than 1/3 of the thickness of the filling layer of the fiber cement-based large-cavity plate, and the density grade is 50-500kg/m3The compression-resistant bearing capacity is more than or equal to 0.5MPa, the sound insulation coefficient is 0.60-0.90, and the volume deformation is less than or equal to 0.01 percent.
Further, the quick hardening binding material is a foaming phosphorus magnesium base binding material.
Further, the foaming phosphorus-magnesium-based gel material comprises the following components in parts by mass: 10-40 parts of light-burned magnesia, 10-20 parts of heavy-burned magnesia, 10-20 parts of soluble phosphate, 4-10 parts of inorganic boron-containing compound, 20-60 parts of low-calcium active admixture, 2-8 parts of polyacrylamide, 2-8 parts of cellulose ether and 10-20 parts of water.
Further, the foaming phosphorus-magnesium-based gel material comprises the following components in parts by mass: 20 parts of light-burned magnesium oxide, 15 parts of heavy-burned magnesium oxide, 15 parts of soluble phosphate, 8 parts of inorganic boron-containing compound, 40 parts of low-calcium active admixture, 6 parts of polyacrylamide, 6 parts of cellulose ether and 15 parts of water.
Furthermore, the fluidity of the slurry of the foaming phosphorus-magnesium-based cementing material is more than or equal to 260mm, and the compressive bearing capacity is more than or equal to 5 MPa.
Further, the inorganic boron-containing compound is at least one of sodium tetraborate decahydrate, zinc borate, barium metaborate, boric acid, borax, and ammonium fluoroborate.
Further, the low-calcium active admixture is at least one of low-calcium fly ash, low-calcium coal gangue and low-calcium desulfurized ash, and the content of free calcium oxide is less than or equal to 1.0 percent.
The components of the material are common raw materials in the field if not specially limited, such as polycarboxylic acid water reducing agent, dispersible latex powder and the like, and can be selected from commercially available products, such as soluble phosphate which is conventional ammonium dihydrogen phosphate and the like.
The invention also provides a preparation method of the combined road sound-proof screen, which comprises the following steps:
step (1): weighing raw material components of the fiber cement-based material according to a ratio, stirring and mixing, grouting, extruding and filling into a mold, and demolding after 24 hours to obtain the sound insulation screen shell;
step (2): pouring foamed metal aggregate, quick-hardening cementing material and water in the large cavity structure in the sound insulation screen shell obtained in the step (1) to obtain a sound insulation filling body;
and (3): and (3) uniformly perforating holes on one surface of the sound insulation screen shell obtained in the step (2) to prepare sound deadening holes.
Further, the pouring process of the sound insulation filling body is as follows:
step (1): laying a steel bar mesh in the large cavity of the sound-proof screen shell;
step (2): and (2) filling foamed metal aggregate into the large cavity of the sound insulation screen shell obtained in the step (1), and then filling the composite slurry prepared by uniformly stirring the quick-hardening cementing material and water.
Furthermore, the preparation method of the combined road sound-proof screen also comprises the step of splicing and combining the specified number of road sound-proof screens according to requirements.
In summary, the invention has the following advantages:
1. the invention provides a combined road sound-proof screen, which comprises a sound-proof screen shell and an internal sound-proof filling body, wherein the sound-proof screen shell is made of a fiber cement-based material, and the sound-proof filling body is a composite curing body prepared by pouring foaming metal aggregate and a quick-hardening cementing material, so that the sound-proof screen has excellent volume stability and weather resistance, and the problem of poor weather resistance of the existing sound-proof screen is effectively solved.
2. The sound-absorbing holes are formed in the sound-insulating screen shell of the combined road sound-insulating screen, so that the sound-insulating screen can widely absorb railway noise, the sound-insulating coefficient is more than or equal to 0.60 by further using the foamed metal aggregate of the sound-insulating filling body, the sound-insulating coefficient and the sound-insulating filling body are cooperatively matched to realize an excellent sound-insulating effect, the sound-insulating effect can reach 30dB and above, and the surface density is less than or equal to 65kg/m2The problem that the existing sound insulation screen is poor in sound insulation effect is effectively solved.
3. The combined road sound-proof screen adopts an assembled combined splicing structure, is efficient to install, convenient to disassemble and assemble and recyclable, and avoids the fixation of the conventional sound-proof screen by adopting H-shaped steel as a framework.
4. The sound insulation filling body is a composite solidified body prepared by pouring foaming metal aggregate, quick-hardening cementing material and water, and foam aluminum particles, foam nickel particles and the like are used as the foaming metal aggregate, so that the sound insulation effect can be effectively improved; meanwhile, the rapid hardening cementing material is matched, so that the sound-proof filler has the characteristics of rapid setting and hardening, high early strength and high bonding strength, the mechanical property of the sound-proof filler can be obviously improved, and the integral weather resistance of the sound-proof screen is further improved; meanwhile, due to the addition of the foaming metal aggregate, the heat release total amount of the quick hardening binding material is reduced, and the problems that the quick hardening binding material is easy to crack due to quick heat release in the pouring process and the like are effectively avoided.
5. According to the foaming phosphorus-magnesium-based cementing material, the low-calcium active admixture and the inorganic boron-containing compound are added, so that the foaming phosphorus-magnesium-based cementing material has the characteristics of high volume stability, small drying shrinkage and good durability, and can be used together with foaming metal aggregate, so that the problems that the traditional cementing material is easy to crack and the like are effectively solved.
Drawings
FIG. 1 is a schematic view of the modular road noise barrier unit of the present invention;
FIG. 2 is a schematic view of the combined structure of the combined road sound-proof screen of the present invention;
wherein, 1, the outer layer of the sound insulation screen shell; 2. a sound insulation filler; 3. the inner layer of the sound insulation screen shell; 4. a silencing hole; 5. compounding a cured body; 6. reinforcing mesh sheets; 7. a sound barrier housing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a combined road sound-proof screen, as shown in fig. 1 and 2, which comprises a sound-proof screen shell 7, wherein one surface of the sound-proof screen shell 7 is provided with a silencing hole, the other surface of the sound-proof screen shell 7 is a solid plate, the inside of the sound-proof screen shell 7 is of a large cavity structure, the hollow rate is 78%, and the large cavity structure is provided with a sound-proof filling body 2;
the sound insulation screen shell 7 is a fiber cement-based large cavity plate prepared from a fiber cement-based material through grouting extrusion, wherein the fiber cement-based material comprises the following components in parts by mass: 50 parts of gypsum slag cement, 15 parts of silica fume, 10 parts of microbeads, 6 parts of dispersible latex powder, 2 parts of organic fibers (specifically polypropylene fibers), 2 parts of a polycarboxylic acid water reducing agent and 10 parts of water;
the sound insulation filling body 2 is a composite solidified body 5 prepared by pouring foaming metal aggregate, a quick hardening cementing material and water according to the mass ratio of 10:6: 1; the quick-hardening binding material is a foaming magnesium phosphate based binding material, and the foaming magnesium phosphate based binding material comprises the following components in parts by mass: 40 parts of light-burned magnesium oxide, 10 parts of heavy-burned magnesium oxide, 10 parts of soluble phosphate (specifically ammonium dihydrogen phosphate), 4 parts of boric acid, 20 parts of low-calcium active admixture (specifically low-calcium fly ash), 2 parts of polyacrylamide, 8 parts of cellulose ether and 10 parts of water; the foamed metal aggregate is foamed aluminum particles, the particle size of the foamed aluminum particles is not more than 1/3 of the thickness of the hollow filling layer of the fiber cement-based large-cavity plate, and the density grade of the foamed aluminum particles is 200kg/m3The compression-resistant bearing capacity is 1.2MPa, the sound insulation coefficient is 0.65, and the volume deformation is avoided.
The preparation method of the combined road sound insulation screen specifically comprises the following steps:
step (1): weighing raw material components of the fiber cement-based material according to a ratio, stirring and mixing, grouting, extruding and filling into a mold, and demolding after 24 hours to obtain the sound insulation screen shell;
step (2): pouring foamed metal aggregate, quick-hardening cementing material and water in the large cavity structure in the sound insulation screen shell obtained in the step (1) to obtain a sound insulation filling body;
and (3): and (3) uniformly perforating one surface of the sound insulation screen shell obtained in the step (2) to prepare sound deadening holes, and then assembling the road sound insulation screen to obtain the combined road sound insulation screen.
Wherein, the pouring process of the sound insulation filling body is as follows:
step (1): laying a steel bar mesh in the large cavity of the sound-proof screen shell;
step (2): and (2) filling foamed metal aggregate into the large cavity of the sound insulation screen shell obtained in the step (1), and then filling the composite slurry prepared by uniformly stirring the quick-hardening cementing material and water.
The sound insulation effect of the combined sound insulation screen manufactured by the embodiment can reach 32dB, and the surface density is 58kg/m2。
Example 2
This example provides a combined road sound barrier, which differs from example 1 only in that: the fiber cement-based material comprises the following components in parts by mass: 70 parts of gypsum slag cement, 5 parts of silica fume, 10 parts of microbeads, 2.5 parts of dispersible latex powder, 2 parts of organic fibers (specifically polypropylene fibers), 0.5 part of a polycarboxylic acid water reducing agent and 10 parts of water; the foaming phosphorus-magnesium-based gelling material comprises the following components in parts by mass: 10 parts of light-burned magnesium oxide, 20 parts of heavy-burned magnesium oxide, 20 parts of soluble phosphate (specifically ammonium dihydrogen phosphate), 10 parts of boric acid, 20 parts of low-calcium active admixture (specifically low-calcium fly ash), 2 parts of polyacrylamide, 8 parts of cellulose ether and 10 parts of water; the foamed metal aggregate is foamed aluminum particles, the particle size of the foamed aluminum particles is not more than 1/3 of the thickness of the hollow filling layer of the fiber cement-based large-cavity plate, and the density grade of the foamed aluminum particles is 160kg/m3The compression-resistant bearing capacity is 0.9MPa, the sound insulation coefficient is 0.70, and the volume deformation is avoided; the preparation method is the same as other parameters.
The sound insulation effect of the combined sound insulation screen manufactured by the embodiment can reach 37dB, and the surface density is 56kg/m2。
Example 3
This example provides a combined road sound barrier, which differs from example 1 only in that: the fiber cement-based material comprises the following components in parts by mass: 60 parts of gypsum slag cement, 10 parts of silica fume, 10 parts of microbeads, 4 parts of dispersible latex powder, 1 part of organic fiber, 1 part of polycarboxylic acid water reducing agent and 20 parts of water; the foaming phosphorus-magnesium-based gelling material comprises the following components in parts by mass: 20 parts of light-burned magnesium oxide, 15 parts of heavy-burned magnesium oxide, 15 parts of soluble phosphate, 8 parts of inorganic boron-containing compound, 40 parts of low-calcium active admixture, 6 parts of polyacrylamide, 6 parts of cellulose ether and 15 parts of water; the preparation method is the same as other parameters.
The sound insulation effect of the combined sound insulation screen manufactured by the embodiment can reach 39dB, and the surface density is 55kg/m2。
Comparative example 1
This example provides a combined road sound barrier, which differs from example 1 only in that: the sound insulation screen shell is a Portland cement-based cavity plate prepared from a Portland cement-based material through grouting extrusion, wherein the Portland cement-based material comprises the following components in parts by mass: 50 parts of Portland cement, 23 parts of fly ash, 2 parts of a polycarboxylic acid water reducing agent and 25 parts of water; the sound insulation filling body is foam concrete, and the density grade of the foam concrete is 300kg/m3. The foam concrete material comprises the following components in percentage by weight: 50 parts of ordinary portland cement, 20 parts of fly ash, 28 parts of water, 2 parts of polycarboxylic acid water reducing agent and 700L of foam for each square of foam concrete; the preparation method is the same as other parameters.
The sound insulation effect of the combined sound insulation screen manufactured by the embodiment is 20dB, and the surface density is 70kg/m2。
Comparative example 2
This example provides a combined road sound barrier, which differs from example 1 only in that: the sound insulation filling body is a solidified body prepared by pouring a quick hardening cementing material and water according to the mass ratio of 16: 1; the preparation method is the same as other parameters.
The sound insulation effect of the combined sound insulation screen manufactured by the embodiment can reach 25dB, and the surface density is 62kg/m2。
Comparative example 3
This example provides a combined road sound barrier, which differs from example 1 only in that: the fiber cement-based material comprises the following components in parts by mass: 90 parts of gypsum slag cement, 10 parts of silica fume, 10 parts of microbeads, 4 parts of dispersible latex powder, 1 part of organic fiber, 1 part of polycarboxylic acid water reducing agent and 20 parts of water; the preparation method is the same as other parameters; the foaming phosphorus-magnesium-based gelling material comprises the following components in parts by mass: 60 parts of light-burned magnesia, 15 parts of heavy-burned magnesia, 15 parts of soluble phosphate, 8 parts of inorganic boron-containing compound, 40 parts of low-calcium active admixture, 6 parts of polyacrylamide, 6 parts of cellulose ether and 15 parts of water.
The sound insulation effect of the combined sound insulation screen prepared by the embodiment is 28dB, and the surface density is 58kg/m2。
The foregoing is merely exemplary and illustrative of the present invention and it is within the purview of one skilled in the art to modify or supplement the embodiments described or to substitute similar ones without the exercise of inventive faculty, and still fall within the scope of the claims.
Claims (10)
1. The utility model provides a modular road sound-proof screen, its characterized in that, includes sound-proof screen casing (7), sound-proof screen casing (7) one side is provided with bloop (4), sound-proof screen casing (7) another side is solid slab, the inside cavity structure that is of sound-proof screen casing (7), the cavity structure is provided with syllable-dividing obturator (2).
2. A modular road barrier as claimed in claim 1, wherein the barrier shell (7) is a fibre cement based large cavity panel made from a fibre cement based material by slip casting extrusion.
3. The modular road acoustic panel of claim 2, wherein the fiber cement-based material comprises the following components in parts by mass: 50-70 parts of gypsum slag cement, 5-15 parts of silica fume, 5-15 parts of micro-beads, 1-6 parts of dispersible latex powder, 0.5-2 parts of organic fiber, 0.5-2.0 parts of polycarboxylic acid water reducing agent and 10-30 parts of water.
4. The combined road sound-insulating barrier according to claim 1, characterized in that the sound-insulating filling body (2) is a composite solidified body (5) made of foamed metal aggregate, quick-hardening cement and water through pouring.
5. The combined type road sound insulation screen as claimed in claim 4, wherein the mass ratio of the foamed metal aggregate, the quick-hardening cementing material and the water is 8-15: 6-20: 1.
6. The modular road acoustic panel of claim 4 or 5, wherein the foamed metal aggregate is foamed metal particles.
7. The combined road sound-proof screen as claimed in claim 4 or 5, wherein the rapid hardening gelled material is a foamed phosphorus magnesium based gelled material, and the foamed phosphorus magnesium based gelled material comprises the following components in parts by mass: 10-40 parts of light-burned magnesia, 10-20 parts of heavy-burned magnesia, 10-20 parts of soluble phosphate, 4-10 parts of inorganic boron-containing compound, 20-60 parts of low-calcium active admixture, 2-8 parts of polyacrylamide, 2-8 parts of cellulose ether and 10-20 parts of water.
8. The modular road acoustical panel of claim 7, wherein the inorganic boron-containing compound is at least one of sodium tetraborate decahydrate, zinc borate, barium metaborate, boric acid, borax, and ammonium fluoroborate, and the low-calcium reactive admixture is at least one of low-calcium fly ash, low-calcium coal refuse, and low-calcium desulfurized fly ash.
9. The method for preparing the combined road sound-proof screen as claimed in any one of claims 1 to 8, which is characterized by comprising the following steps:
step (1): weighing raw material components of the fiber cement-based material according to a ratio, stirring and mixing, grouting, extruding and filling into a mold, and demolding after 24 hours to obtain the sound insulation screen shell;
step (2): pouring foamed metal aggregate, quick-hardening cementing material and water in the large cavity structure in the sound insulation screen shell obtained in the step (1) to obtain a sound insulation filling body;
and (3): and (3) uniformly perforating holes on one surface of the sound insulation screen shell obtained in the step (2) to prepare sound deadening holes.
10. The method for preparing a combined road sound-proof screen as claimed in claim 9, wherein the pouring process of the sound-insulating filling body in the step (2) is as follows:
step (1): laying a steel bar mesh in the large cavity of the sound-proof screen shell;
step (2): and (3) filling foamed metal aggregate into the cavity of the sound insulation screen shell obtained in the step (1), and then filling the composite slurry prepared by uniformly stirring the quick-hardening cementing material and water.
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| CN114045762A (en) * | 2021-12-02 | 2022-02-15 | 山东高速铁建装备有限公司 | Road sound barrier and production method thereof |
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Application publication date: 20211026 |