Recycled aggregate porous concrete acoustic board

Abstract

The utility model relates to the technical field of noise reduction equipment, and provides a recycled aggregate porous concrete acoustic board which comprises a first concrete layer and a second concrete layer, and the first concrete layer and the second concrete layer are stacked to form an acoustic board block. The void ratio of bone grains in the first concrete layer is 10%-30%, the slump of concrete in the second concrete layer is larger than 200 mm, and the slump expansion degree ranges from 450 mm to 550 mm. According to the recycled aggregate porous concrete acoustic board, the first concrete layer and the second concrete layer are arranged, the first concrete layer is the porous concrete layer, and concrete in the second concrete layer is concrete with high fluidity, so that the acoustic board has a good sound absorption effect, and meanwhile, the dead weight of the acoustic board is reduced; the recycled aggregate porous concrete acoustic board can be suitable for various application scenes, and the applicability of the recycled aggregate porous concrete acoustic board is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction equipment, in particular to a sound-absorbing board of recycled aggregate porous concrete. Background Art

[0002] With the development of cities, whether it is industrial noise or transportation noise, the impact of noise pollution on people's lives cannot be underestimated. At present, most of the materials used for sound absorption are fibrous, but the sound absorption effect of fibrous sound absorption materials is easily affected in humid or high-temperature environments, and their durability is not strong. Moreover, fibrous sound absorption materials are not conducive to human health during the production process.

[0003] Concrete materials have good weather resistance and heat resistance, can be used in more noise environments, and can also utilize construction waste, which is beneficial to environmental protection. However, the disadvantage is that the self-weight is relatively large, which restricts the use of concrete sound-absorbing boards. Content of the Utility Model

[0004] The utility model provides a sound-absorbing board of recycled aggregate porous concrete to solve the defect that the self-weight of the concrete sound-absorbing board in the prior art is relatively large.

[0005] The utility model provides a sound-absorbing board of recycled aggregate porous concrete, including: a first concrete layer and a second concrete layer, the first concrete layer and the second concrete layer are stacked to form a sound-absorbing plate; the porosity of the bone particles in the first concrete layer is 10%-30%, and the slump of the concrete in the second concrete layer is greater than 200mm, and the slump flow is between 450mm and 550mm.

[0006] According to the sound-absorbing board of recycled aggregate porous concrete provided by the utility model, the first concrete layer and the second concrete layer are integrally formed.

[0007] According to the sound-absorbing board of recycled aggregate porous concrete provided by the utility model, the thickness of the first concrete layer is less than the thickness of the second concrete layer.

[0008] According to the sound-absorbing board of recycled aggregate porous concrete provided by the utility model, an air-entraining water reducer, recycled micro powder and polyvinyl alcohol fibers are mixed in the second concrete layer.

[0009] According to the sound-absorbing board of recycled aggregate porous concrete provided by the utility model, the length of the polyvinyl alcohol fibers is 10mm-20mm, and the diameter of the polyvinyl alcohol fibers is 0.01mm-0.05mm.

[0010] According to the sound-absorbing board of recycled aggregate porous concrete provided by the utility model, the second concrete layer is provided with a plurality of installation holes to fix the sound-absorbing plate near the noise source through the installation holes.

[0011] According to a kind of sound-absorbing board of recycled aggregate porous concrete provided by the present utility model, the number of the sound-absorbing plates is multiple, and the multiple sound-absorbing plates are connected in sequence.

[0012] According to a kind of sound-absorbing board of recycled aggregate porous concrete provided by the present utility model, it further includes a pair of frames. The pair of frames are arranged in parallel. Each frame is provided with a groove, and the opposite sides of the multiple sound-absorbing plates are respectively embedded in the pair of grooves.

[0013] According to a kind of sound-absorbing board of recycled aggregate porous concrete provided by the present utility model, it further includes a waterproof board. The waterproof board is stacked with the sound-absorbing plate, and the opposite sides of the waterproof board are respectively embedded in the pair of grooves.

[0014] According to a kind of sound-absorbing board of recycled aggregate porous concrete provided by the present utility model, it further includes a plurality of fasteners, and the plurality of fasteners are used to connect the waterproof board and the sound-absorbing plate.

[0015] For the sound-absorbing board of recycled aggregate porous concrete provided by the present utility model, by arranging a first concrete layer and a second concrete layer, wherein the first concrete layer is a porous concrete layer, and the concrete in the second concrete layer has very high fluidity, the sound-absorbing plate not only has good sound-absorbing effect, but also reduces the self-weight of the sound-absorbing plate, so that the sound-absorbing board of recycled aggregate porous concrete can be applicable to a variety of application scenarios and improves the applicability of the sound-absorbing board of recycled aggregate porous concrete. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0017] Figure 1 It is one of the front views of the sound-absorbing board of recycled aggregate porous concrete provided by the present utility model.

[0018] Figure 2 It is one of the side views of the sound-absorbing board of recycled aggregate porous concrete provided by the present utility model.

[0019] Figure 3 It is the second front view of the sound-absorbing board of recycled aggregate porous concrete provided by the present utility model.

[0020] Figure 4 It is the second side view of the sound-absorbing board of recycled aggregate porous concrete provided by the present utility model.

[0021] Reference Signs:

[0022] 1. First concrete layer; 2. Second concrete layer; 3. Fastener; 4. Frame; 5. Waterproof board; 10. Sound-absorbing plate; 21. Installation hole. Detailed implementation manner

[0023] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0024] The terms "first" and "second" in the description and claims of the present utility model may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0026] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The following combines Figures 1-4 to describe the recycled aggregate porous concrete sound-absorbing board of the present utility model.

[0028] As Figure 1 and Figure 2As shown in the figure, in the embodiment of the present utility model, the recycled aggregate porous concrete sound-absorbing board comprises: a first concrete layer 1 and a second concrete layer 2. The first concrete layer 1 and the second concrete layer 2 are stacked to form a sound-absorbing plate 10. The void ratio of the bone particles in the first concrete layer 1 is 10%-30%. The slump of the concrete in the second concrete layer 2 is greater than 200 mm, and the slump flow is between 450 mm and 550 mm.

[0029] Specifically, the first concrete layer 1 is a porous concrete layer. The aggregate of the first concrete layer 1 is Class I recycled fine aggregate, and the void ratio of the bone particles in the first concrete layer is 10%-30%. The first concrete layer 1 has a large void ratio, which can not only absorb external noise but also reduce the weight of the first concrete layer 1. The slump of the concrete in the second concrete layer 2 is greater than 200 mm, and the slump flow is between 450 mm and 550 mm. That is, the concrete in the second concrete layer 2 is a concrete with high fluidity and requires a certain amount of vibration to be compacted. The second concrete layer 2 can play a role in isolating noise, so that the sound-absorbing plate 10 has a good noise reduction effect.

[0030] Furthermore, the first concrete layer 1 and the second concrete layer 2 have a large number of voids, so that the sound-absorbing plate 10 not only has a good sound-absorbing effect but also reduces the self-weight of the sound-absorbing plate 10.

[0031] The recycled aggregate porous concrete sound-absorbing board provided by the embodiment of the present utility model, by setting the first concrete layer and the second concrete layer, wherein the first concrete layer is a porous concrete layer and the concrete in the second concrete layer is a concrete with very high fluidity, enables the sound-absorbing plate to not only have a good sound-absorbing effect but also reduces the self-weight of the sound-absorbing plate, so that the recycled aggregate porous concrete sound-absorbing board can be applied to a variety of application scenarios and improves the applicability of the recycled aggregate porous concrete sound-absorbing board.

[0032] Furthermore, in the embodiment of the present utility model, the first concrete layer 1 and the second concrete layer 2 are integrally formed. Specifically, during the casting process in which the first concrete layer 1 and the second concrete layer 2 are integrally formed, the second concrete layer 2 will penetrate into the first concrete layer 1 to form an integral body. The second concrete layer 2 can not only penetrate into the first concrete layer 1 but also ensure that the mortar penetration during the preparation process will not be excessive, resulting in the blockage of the pores of the first concrete layer 1 and thus affecting the sound-absorbing effect.

[0033] In the embodiment of the present utility model, the thickness of the first concrete layer 1 is less than the thickness of the second concrete layer 2.

[0034] Specifically, in this embodiment, the first concrete layer 1 can use recycled aggregate produced by crushing waste concrete in construction waste as aggregate, the thickness of the first concrete layer 1 can be 1cm-2cm, and the particle size of the aggregate in the first concrete layer 1 is 0.16mm-5mm. The thickness of the second concrete layer 2 can be 5cm-8cm.

[0035] Furthermore, in an embodiment of the utility model, air-entraining water-reducing agent, recycled micropowder and polyvinyl alcohol fiber are added to the second concrete layer 2. The water-reducing rate of the air-entraining water-reducing agent is 18%-20%, and the water seepage rate is 14%-16%, so that the slump loss of the concrete after 60 minutes is less than 5.0 cm, and the air content changes within the range of -1.5%-1.5%. The recycled micropowder is a grade I recycled micropowder produced by crushing waste concrete. The length of the polyvinyl alcohol fiber is 10mm-20mm, and the diameter range is 0.01mm-0.05mm. By combining porous concrete with medium fluidity concrete, more pores are introduced to enable the concrete to obtain good sound absorption effect while reducing its own weight.

[0036] The recycled aggregate porous concrete sound-absorbing board provided by the embodiment of the utility model can be made of recycled aggregate produced by crushing waste concrete in construction waste as the aggregate in the first concrete layer, and the recycled micropowder in the second concrete layer can be made of grade I recycled micropowder produced by crushing waste concrete, thereby realizing waste utilization and reducing the generation of construction waste. It can also protect the environment while reducing noise. At the same time, the recycled aggregate porous concrete sound-absorbing board has a low manufacturing cost and can be widely promoted and applied.

[0037] like Figure 2 As shown, the second concrete layer 2 is provided with a plurality of mounting holes 21. After the fasteners 3 are inserted through the mounting holes 21, the sound absorbing panel 10 can be fixed near the noise source. In the embodiment of the utility model, the size of the sound absorbing panel 10 and the texture on the surface of the first concrete layer 1 can be customized according to user needs, but the length of the sound absorbing panel 10 does not exceed 600 mm, and the total bulk density of each sound absorbing panel 10 is 500 kg / m 3 -1500kg / m 3 The compression resistance index is 5 MPa -15MPa, and the frost resistance index is more than 100 freeze-thaw cycles.

[0038] like Figure 3 As shown, in an embodiment of the present invention, there are multiple sound absorbing panels 10, and the multiple sound absorbing panels 10 are connected in sequence to form a sound absorbing barrier to meet the noise reduction requirements of different application scenarios.

[0039] like Figure 3 and Figure 4As shown, in the embodiment of the present utility model, the recycled aggregate porous concrete sound absorption board further includes a pair of frames 4. The pair of frames 4 are arranged in parallel, and each frame 4 is provided with a groove. The opposite sides of multiple sound absorption plates 10 are respectively embedded in the pair of grooves.

[0040] Specifically, in this embodiment, the frame 4 can be a U-shaped steel channel. Each frame 4 is used to fix one side of multiple sound absorption plates 10, so that multiple sound absorption plates 10 are spliced into a whole to form a sound absorption barrier.

[0041] As Figure 4 shown, in the embodiment of the present utility model, the recycled aggregate porous concrete sound absorption board further includes a waterproof board 5. The waterproof board 5 is stacked with the sound absorption plates 10, and the opposite sides of the waterproof board 5 are respectively embedded in the pair of grooves.

[0042] Specifically, after multiple sound absorption plates 10 are spliced in sequence, the waterproof board 5 is stacked on one side of multiple sound absorption plates 10. The opposite sides of the sound absorption plates 10 and the waterproof board 5 are respectively embedded in the grooves of a pair of frames 4, so as to fix the waterproof board 5 and the sound absorption plates 10 into a whole.

[0043] Furthermore, the recycled aggregate porous concrete sound absorption board further includes a plurality of fasteners 3. The fasteners 3 are used to connect the waterproof board 5 and the sound absorption plates 10. During actual operation, the waterproof board 5 and the sound absorption plates 10 can be first connected into a whole by the fasteners 3. Then, the opposite sides of the whole formed by the waterproof board 5 and the sound absorption plates 10 are respectively embedded in the grooves of the frame 4. When fixing is required, it can be fixed to the wall surface or the like through the fasteners 3.

[0044] Optionally, in the embodiment of the present utility model, the fasteners 3 can be expansion bolts, and the material of the expansion bolts can be stainless steel.

[0045] The recycled aggregate porous concrete sound absorption board provided by the embodiment of the present utility model can splice multiple sound absorption plates into a sound absorption barrier by arranging frames, waterproof boards and a plurality of fasteners. The formed sound absorption barrier can not only reduce noise but also prevent water, and can be widely applied to the noise reduction treatment of traffic noise and industrial noise.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A recycled aggregate porous concrete sound-absorbing board, characterized in that: include: A first concrete layer and a second concrete layer, wherein the first concrete layer and the second concrete layer are stacked to form a sound absorbing plate; The void ratio of aggregate particles in the first concrete layer is 10%-30%, the slump of concrete in the second concrete layer is greater than 200 mm, and the slump expansion is between 450 mm and 550 mm.

2. The recycled aggregate porous concrete sound-absorbing board according to claim 1, characterized in that: The first concrete layer and the second concrete layer are integrally formed.

3. The recycled aggregate porous concrete sound-absorbing board according to claim 1, characterized in that: The thickness of the first concrete layer is smaller than the thickness of the second concrete layer.

4. The recycled aggregate porous concrete sound-absorbing board according to claim 1, characterized in that: The second concrete layer is provided with a plurality of mounting holes, so that the sound absorbing panel can be fixed near the noise source through the mounting holes.

5. The recycled aggregate porous concrete sound-absorbing board according to claim 1, characterized in that: There are multiple sound absorbing panels, and the multiple sound absorbing panels are connected in sequence.

6. The recycled aggregate porous concrete sound absorbing board according to claim 5, characterized in that: It also includes a pair of frames, which are arranged in parallel. Each frame is provided with a groove, and opposite sides of a plurality of sound-absorbing panels are respectively embedded in the pair of grooves.

7. The recycled aggregate porous concrete sound-absorbing board according to claim 6, characterized in that: It also includes a waterproof plate, which is stacked with the sound-absorbing plate, and opposite sides of the waterproof plate are respectively embedded in a pair of the grooves.

8. The recycled aggregate porous concrete sound-absorbing board according to claim 7, characterized in that: It also includes a plurality of fasteners, which are used to connect the waterproof board with the sound absorbing board.

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