CN113373833A - Plug-in type light high-strength durable composite structure sound barrier and mounting method thereof - Google Patents
Plug-in type light high-strength durable composite structure sound barrier and mounting method thereof Download PDFInfo
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Images
Classifications
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- 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
- E01F8/0029—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with porous surfaces, e.g. concrete with porous fillers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses an insertion type light high-strength durable composite structure sound barrier and an installation method thereof, belonging to the technical field of sound barriers. The sound barrier belongs to a nonmetal sound barrier, and is characterized by strong durability, light dead weight, high strength, good sound insulation performance, good water resistance and fire resistance, and the surface density is less than or equal to 100kg/m2The noise reduction coefficient is more than or equal to 0.70, the sound insulation capacity is more than or equal to 50dB, and the shock resistance is more than or equal to35J, the bending load is more than or equal to 4.0kPa, and the maximum elastic deflection of the sound barrier is less than or equal to L/350 when the wind pressure of the sound barrier is +/-4 kPa.
Description
Technical Field
The invention relates to the technical field of sound barriers, in particular to an insertion type light high-strength durable composite structure sound barrier and an installation method thereof.
Background
With the great improvement of the material life, the direction of people to the nice life is more and more intense, and more contradictions which are not paid attention in the past are caused in the living field. The balance between traffic convenience and living comfort is a manifestation of this conflict. Residents living on both sides of railways, highways and urban roads have more convenient traffic conditions, but the shuttling of trains and automobiles brings troublesome noise problems. In order to solve the noise problem, three modes of road surface noise reduction, noise barrier noise reduction and noise insulation window noise reduction exist at present.
Noise reduction of sound barriers is widely applied to highway and railway traffic, and at present, two types of noise barriers, namely metal noise barriers and nonmetal noise barriers, are mainly adopted. The advantage of the non-metallic sound barrier is represented by low maintenance cost, no corrosion risk, low fatigue failure risk and the like, but the existing non-metallic sound barrier still faces the problems of great self weight, low cavity rate and high forming difficulty.
Disclosure of Invention
Aiming at the defects, the invention aims to provide an insertion type light high-strength durable composite structure sound barrier and an installation method thereof, which can effectively solve the problems of great weight, low cavity rate and high forming difficulty in the existing nonmetal sound barrier.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an ultrahigh-performance cement-based fiber toughening material which comprises the following components in parts by mass: 650 parts of cement, 500 parts of limestone powder, 650 parts of early strength component, 30-60 parts of fiber, 4-12 parts of water reducing agent, 1-3 parts of defoaming agent, 300 parts of water and 350 parts of fine aggregate and 700 parts of fine aggregate.
Further, the ultrahigh-performance cement-based fiber toughening material comprises the following components in parts by mass: 600 parts of cement, 550 parts of limestone powder, 45 parts of early strength component, 25 parts of fiber, 8 parts of water reducing agent, 2 parts of defoaming agent, 320 parts of water and 500 parts of fine aggregate.
Further, the cement is ordinary portland cement, slag portland cement, pozzolanic portland cement, fly ash portland cement or composite portland cement.
Furthermore, the particle size of the limestone powder is 1-200 μm.
Further, the early strength component is at least one of sulphoaluminate cement, aluminate cement, nitrite and anhydrous sodium sulfate.
Further, the early strength component is composed of sulphoaluminate cement and anhydrous sodium sulfate in a mass ratio of 30-60: 1-2.
Further, the fiber is at least one of polypropylene fiber, polypropylene alcohol fiber, polyether fiber, aromatic polyamide fiber, polyvinyl alcohol fiber, polyacrylonitrile fiber and polyethylene fiber; the length of the material is 8-16 mm, and the diameter is 0.1-0.3 mm.
Further, the water reducing agent is a polycarboxylic acid water reducing agent or a naphthalene water reducing agent.
Further, the defoaming agent is at least one of a silicone defoaming agent, a polyether defoaming agent, a fatty acid defoaming agent and a phosphate ester defoaming agent.
Further, the fine aggregate is at least one of quartz powder, iron tailing sand and coal gangue powder.
Further, the fine aggregate is prepared from the following components in a mass ratio of 200-300: 220-400 parts of quartz powder and iron tailings; wherein the particle size of the quartz powder is not more than 200 meshes.
The preparation method of the ultrahigh-performance cement-based fiber toughening material comprises the following steps:
step (1): stirring and mixing cement, limestone powder, fine aggregate and early strength components for 1-3 minutes to obtain a mixed material;
step (2): adding water into the mixed material obtained in the step (1) for stirring, so that the mixed material is uniformly dispersed in the water, and then adding a water reducing agent and a defoaming agent for stirring to form viscous and flowable slurry;
and (3): and (3) adding the fibers into the slurry obtained in the step (2) and uniformly stirring.
The invention also provides an inserted light high-strength durable composite structure sound barrier, and the base material of the sound barrier is prepared by adopting the ultrahigh-performance cement-based fiber toughening material.
Furthermore, the plug-in type light high-strength durable composite structure sound barrier comprises a shell, wherein the shell is composed of a panel with a hole on the surface and a back plate without a hole on the surface, a middle cavity with a cavity structure is arranged between the panel and the back plate, and sound absorption materials are filled in the panel and the middle cavity.
The panel and the back plate of the sound barrier adopt the ultra-high performance cement-based fiber toughening material.
Furthermore, the cavity rate of the inserted light high-strength durable composite structure sound barrier is more than or equal to 60 percent.
On the premise of meeting the requirement that the sound barrier has excellent mechanical properties, the sound barrier has a large cavity rate by adjusting the structural form and the overall dimension of the cross-section hole, so that the problem of large self weight in the existing nonmetal sound barrier is effectively solved.
Further, the sound-absorbing material is at least one of an inorganic material sound-absorbing board, a foamed metal sound-absorbing board, a foamed cement-based material and a gypsum-based material.
The sound-absorbing material can be selected according to actual conditions, and the thicknesses of the inorganic material sound-absorbing board and the foamed metal sound-absorbing board can be customized and produced according to the size of the cavity space, so that the best sound-absorbing effect is achieved.
Further, the inorganic material sound-absorbing board is a sand-based sound-absorbing board, and the sand-based sound-absorbing board comprises a sand-based water-permeable air-impermeable sound-absorbing board, a sand-based air-permeable water-impermeable sound-absorbing board or a sand-based air-permeable/water-permeable sound-absorbing board; wherein the sand is one or a mixture of quartz sand and heavy ferrotitanium tailing sand, and the particle size of the sand is at least one of 0.5-1.0 mm, 1.0-1.5 mm and 1.5-2.0 mm; the bending resistance bearing capacity of the sand-based acoustic panel is not less than 7kPa, and the impact resistance is not less than 35J.
Furthermore, the bonding material of the sand-based sound absorption board is an inorganic bonding material or an organic bonding material; wherein, the inorganic bonding material is preferably 72.5R-grade portland cement, quick-hardening high-alumina cement or magnesium phosphate cement; the organic binder is preferably a polyurethane material, an epoxy resin material or a composite resin.
Further, the foamed metal sound-absorbing board is made of a foamed aluminum material, a foamed copper material or a foamed nickel alloy material, preferably a foamed aluminum material; wherein the density of the foamed metal sound-absorbing board is 150-300 kg/m3The sound absorption coefficient is more than or equal to 0.7, the porosity is more than or equal to 90%, the pore diameter is 1-3 mm, and the compressive strength is more than or equal to 2 Mpa; the foamed metal sound-absorbing board is spliced by special adhesive glue which is conventional in the field.
Furthermore, the back plate is provided with a reinforcing mesh; wherein the reinforcing mesh is a twisted steel bar, a prestressed steel wire or a prestressed steel strand; wherein the diameters of the steel bars, the steel wires and the steel strands are all 5-16 mm.
Furthermore, the reinforcing mesh is arranged in a pre-embedded mode, a pre-tensioning mode or a post-tensioning mode; preferably, the pre-embedded reinforcing mesh is in a bolt welding mode or a steel wire binding mode.
Furthermore, the molding mode of the back plate and the panel is one-time molding, secondary composite molding or multiple composite molding; the method specifically comprises the following steps: the back plate and the panel can be integrally molded in an automatic grouting and extruding mode; or the back plate and the panel are separately molded and then secondarily compounded, a large cavity structure is molded firstly, the cavity rate is more than or equal to 60 percent, the aperture ratio of the panel can be 4 to 28 percent according to the requirement, and the back plate is reinforced by secondary reinforcement.
The invention also provides a mounting method of the plug-in type light high-strength durable composite structure sound barrier, wherein two ends of the sound barrier plate are fixed on the H-shaped steel upright post through special connecting pieces such as grooves, tongue-and-groove mortise structures and sealing adhesive tapes, and the sound barrier is formed by sealing and filling the gap at the connecting part by adopting inorganic or organic materials; the method specifically comprises the following steps:
step (1): connecting and erecting H-shaped steel upright posts at two sides of a road;
step (2): the plug-in type sound barrier with the light, high-strength and durable composite structure is transversely placed between two H-shaped steel stand columns, all the sound barriers are connected and fixed according to the plate groove and tongue-and-groove mortise structure, and then gaps between the sound barriers and the H-shaped steel stand columns are sealed.
Further, the sealing treatment process in the step (2) is as follows: and filling the gap between the sound barrier and the I-shaped steel stand column by using filling rubber and sealing rubber strips or water-swelling mortar, and naturally drying.
In summary, the invention has the following advantages:
1. the ultra-high performance cement-based fiber toughening material enhances the toughness, crack resistance and breaking strength of the composite material by adding the early strength component; the super-high toughness cement-based composite material is matched with cement, limestone powder, fine aggregates such as coal gangue powder and the like for use, so that the compression-fracture ratio and the dry shrinkage rate of the composite material are reduced, the prepared super-high toughness cement-based composite material has excellent durability, impact resistance and fatigue resistance, and the environmental adaptability of the composite material can be effectively enhanced.
2. The inserted light high-strength durable composite structure sound barrier belongs to a non-metallic sound barrier, a shell base material of the sound barrier is made of the ultra-high performance cement-based fiber toughening material, the cavity rate is more than or equal to 60 percent, the sound barrier has the advantages of strong durability, light dead weight, high strength, good sound insulation performance, good water resistance and flame retardance, and the surface density is less than or equal to 100kg/m2The noise reduction coefficient is more than or equal to 0.70, the sound insulation capacity is more than or equal to 50dB, the shock resistance is more than or equal to 35J, the bending load is more than or equal to 4.0kPa, and the maximum elastic deflection of the sound barrier is less than or equal to L/350 when the wind pressure is +/-4 kPa.
Drawings
FIG. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a second schematic structural view of the present invention;
FIG. 3 is a third schematic structural view of the present invention;
FIG. 4 is a schematic view of the installation of the present invention;
fig. 5 is an enlarged view of a portion of the present invention.
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 an insertion type sound barrier with light weight, high strength and durable composite structure, which comprises a shell, wherein the shell consists of a face plate with a hole on the surface and a back plate without a hole on the surface, a middle cavity with a cavity structure is arranged between the face plate and the back plate, sound absorbing materials are not filled in the face plate and the middle cavity, the face plate adopts ultra-high performance cement-based fiber toughening materials, the back plate adopts a medium strength prestressed wire mesh sheet with the height of 3m and the reinforcing bars of 200mm multiplied by 200mm and the nominal diameter of 5mm, the thickness of the back plate and the face plate is 20mm, the surface opening rate of the face plate is 20 percent, the forming mode of the back plate and the face plate is one-step forming, H-shaped steel is inserted for fixing, the back plate and the face plate are arranged at two sides of a road for absorbing noise, the sound barriers are connected and fixed through plate grooves and tongue-and groove mortise structures, then gaps between the sound barriers and H-shaped steel upright posts are sealed by filling rubber and sealing rubber strips, as shown in fig. 4-5;
the ultrahigh-performance cement-based fiber toughening material comprises the following components in parts by mass: 600 parts of ordinary portland cement (with the strength grade of 42.5R), 550 parts of limestone powder with the particle size of 100-200 mu m, 45 parts of early strength component (specifically consisting of 40:1 sulphoaluminate cement and anhydrous sodium sulfate by mass ratio), 25 parts of fiber (specifically polyvinyl alcohol fiber with the length of 8-16 mm and the diameter of 0.1-0.3 mm), 8 parts of water reducing agent (specifically polycarboxylic acid water reducing agent), 2 parts of defoaming agent (specifically organic silicon defoaming agent with the product model of AFE-76-10), 320 parts of water and 500 parts of fine aggregate (specifically consisting of 200:300 quartz powder and iron tailings by mass ratio, wherein the particle size of the quartz powder is not more than 200 meshes).
Example 2
In this example, the conditions except that the sand-based sound-absorbing plate (wherein the sand is quartz sand, the particle size of the sand is 0.5-1.0 mm, the bending resistance bearing capacity of the sand-based sound-absorbing plate is not less than 7kPa, the impact resistance is not less than 35J, and the binder is 72.5R-grade portland cement) is filled in the middle cavity are the same as those of example 1 as shown in fig. 1-3.
Example 3
In this example, the conditions were the same as those in example 1 except that the foamed metal sound-absorbing sheet (of which the foamed metal sound-absorbing sheet is made of foamed aluminum) was filled in the intermediate cavity.
Example 4
The same conditions as in example 1 were used except that the backing plate was 100mm × 100mm in rib mesh size and the foamed metal sound-absorbing plate filled in the intermediate cavity (same as in example 3) were used.
Examples of the experiments
This example tests the performance of the sound barrier obtained in examples 1 to 4 according to TBT3122-2010 "railway sound barrier component and test method", the fire endurance being determined according to standard (GBT 9978.8-2008) method for fire resistance test of building components part 8: special requirements for non-load bearing vertical partition members "; wherein, the compression strength and the water absorption of the base material adopt a test piece of 100mm multiplied by 100 mm.
Table 1 examples 1-5 sound barriers physical and mechanical properties
TABLE 2 examples 1-5 thermodynamic and acoustical barrier properties
As can be seen from the test data in the above table, the substrate density of the sound barrier of the present invention is 1900kg/m3The volume water absorption rate is less than or equal to 7 percent, and the density of the prefabricated wall panel with the thickness of 140mm is 100kg/m2The fireproof door can resist wind load of more than 4kPa, has the fireproof limit of more than 3.5h and the combustion performance grade of A1, and has the advantages of light weight, high strength, high durability, excellent fireproof and fireproof functions.
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 ultrahigh-performance cement-based fiber toughening material is characterized by comprising the following components in parts by mass: 650 parts of cement, 500 parts of limestone powder, 650 parts of early strength component, 30-60 parts of fiber, 4-12 parts of water reducing agent, 1-3 parts of defoaming agent, 300 parts of water and 350 parts of fine aggregate and 700 parts of fine aggregate.
2. The ultra-high performance cement-based fiber toughening material of claim 1, comprising the following components in parts by mass: 600 parts of cement, 550 parts of limestone powder, 45 parts of early strength component, 25 parts of fiber, 8 parts of water reducing agent, 2 parts of defoaming agent, 320 parts of water and 500 parts of fine aggregate.
3. The ultra-high performance cement-based fiber toughening material of claim 1 or 2, wherein the cement is ordinary portland cement, slag portland cement, pozzolanic portland cement, fly ash portland cement, or composite portland cement; the early strength component is at least one of sulphoaluminate cement, aluminate cement, nitrite and anhydrous sodium sulfate; the fiber is at least one of polypropylene fiber, polypropylene alcohol fiber, polyether fiber, aromatic polyamide fiber, polyvinyl alcohol fiber, polyacrylonitrile fiber and polyethylene fiber; the water reducing agent is a polycarboxylic acid water reducing agent or a naphthalene water reducing agent; the fine aggregate is at least one of quartz powder, iron tailing sand and coal gangue powder.
4. A method for preparing an ultra high performance cement based fibre toughening material according to any of claims 1 to 3, characterized by comprising the steps of:
step (1): stirring and mixing cement, limestone powder, fine aggregate and early strength components for 1-3 minutes to obtain a mixed material;
step (2): adding water into the mixed material obtained in the step (1) for stirring, so that the mixed material is uniformly dispersed in the water, and then adding a water reducing agent and a defoaming agent for stirring to form viscous and flowable slurry;
and (3): and (3) adding the fibers into the slurry obtained in the step (2) and uniformly stirring.
5. An inserted light high-strength durable composite structure sound barrier, characterized in that, the base material of the sound barrier adopts the ultra-high performance cement-based fiber toughening material of any one of claims 1 to 3.
6. The inserted light-weight high-strength durable composite structural sound barrier according to claim 5, comprising a shell body, wherein the shell body is composed of a face plate with an opening on the surface and a back plate without an opening on the surface, an intermediate cavity with a cavity structure is arranged between the face plate and the back plate, and the face plate and the intermediate cavity are filled with sound absorption materials.
7. The inserted lightweight high strength durable composite structural sound barrier of claim 6, wherein said sound absorbing material is at least one of an inorganic material sound absorbing panel, a foamed metal sound absorbing panel, a foamed cement based material and a gypsum based material.
8. The inserted light-weight high-strength durable composite structural sound barrier of claim 7, wherein the inorganic material sound-absorbing plate is a sand-based sound-absorbing plate, and the foamed metal sound-absorbing plate is made of foamed aluminum material, foamed copper material or foamed nickel alloy material.
9. The insertable, lightweight, high strength durable composite structural sound barrier of claim 6, wherein said back panel is provided with a mesh of steel reinforcement; wherein the reinforcing mesh is a threaded reinforcing bar, a prestressed steel wire or a prestressed steel strand.
10. The installation method of the inserted light weight high strength durable composite structure sound barrier according to any one of claims 5 to 9, characterized by comprising the following steps:
step (1): connecting and erecting H-shaped steel upright posts at two sides of a road;
step (2): the plug-in type sound barrier with the light, high-strength and durable composite structure is transversely placed between two H-shaped steel stand columns, all the sound barriers are connected and fixed according to the plate groove and tongue-and-groove mortise structure, and then gaps between the sound barriers and the H-shaped steel stand columns are sealed.
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Application publication date: 20210910 |