Combined shock-absorbing and noise-reducing floor slab and preparation method thereof

Abstract

The present invention discloses a combined shock-absorbing and noise-reducing floor slab and a preparation method thereof. The combined shock-absorbing and noise-reducing floor slab comprises a surface layer and a base layer; a foam concrete layer, a sound-absorbing and noise-reducing layer, a sound-insulating and noise-reducing layer and a shock-absorbing paint layer are arranged between the surface layer and the base layer; and the layers from the surface layer to the base layer are combined with each other to form an integral structure. The combined shock-absorbing and noise-reducing floor slab adopts a multi-layered integral structure, which is not only light in weight and convenient to use, but also comprises a foam concrete layer, a sound-absorbing and noise-reducing layer, a sound-insulating and noise-reducing layer and a shock-absorbing paint layer, which can effectively perform sound insulation and noise reduction between upper and lower floors. The preparation method of the present invention can effectively prepare a combined floor slab with good shock-absorbing and noise-reducing effects.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to a combined shock-absorbing and noise-reducing floor slab and a preparation method thereof. Background Art

[0002] As the load-bearing part of the floor layer, the floor slab can divide the house into several layers in the vertical direction, and transfer the vertical load and the weight of the floor slab to the foundation through walls, beams or columns. In temporary buildings, modular floor slabs are usually used to assemble and build layered floor slabs. Modular floor slabs are usually pre-fabricated at a prefabrication site or construction site, and then assembled and installed. The use of modular floor slabs has the advantages of convenient transfer and reusability, effectively improving the labor conditions during production, fast construction speed, and saving construction time. It is especially important in the construction of construction sites or temporary medical facilities.

[0003] The floor slab is used to divide the floor into layers, which requires the floor slab to have good shock absorption and sound insulation and noise reduction effects to avoid mutual interference between upper and lower floors. However, the traditional modular floor slab is usually thin, usually cast with a single concrete material, and has a simple structure. It not only has a very poor shock absorption effect, but also a weak noise reduction effect. The sound can often still be clearly heard between the upper and lower floors, and it cannot form a good sound insulation effect between the floors, which seriously affects the health of users. Summary of the invention

[0004] The purpose of the present invention is to provide a combined vibration-absorbing and noise-reducing floor slab in view of the defects or shortcomings in the prior art. The combined vibration-absorbing and noise-reducing floor slab adopts a multi-layered integral structure, which includes a foam concrete layer, a sound-absorbing and noise-reducing layer, a sound-insulating and noise-reducing layer, and a vibration-absorbing coating layer, and can effectively insulate and reduce noise between upper and lower floors.

[0005] The present invention also aims to provide a method for preparing a combined vibration-absorbing and noise-reducing floor slab, which can effectively prepare a combined floor slab with good vibration-absorbing and noise-reducing effects.

[0006] The purpose of the present invention is achieved through the following technical solutions.

[0007] A combined shock-absorbing and noise-reducing floor slab comprises a surface layer and a base layer; a foamed concrete layer, a sound-absorbing and noise-reducing layer, a sound-insulating and noise-reducing layer and a shock-absorbing paint layer are arranged between the surface layer and the base layer; the foamed concrete layer, the sound-absorbing and noise-reducing layer, the sound-insulating and noise-reducing layer and the shock-absorbing paint are arranged in sequence between the surface layer and the base layer; and the layers from the surface layer to the base layer are combined with each other to form an integral structure.

[0008] In a preferred embodiment, the sound absorbing and noise reducing layer is a cement fiber layer; the interior of the sound absorbing and noise reducing layer has a mesh structure; the meshes of the mesh structure are interconnected;

[0009] The sound-absorbing and noise-reducing layer is provided with ventilation micropores around it; the ventilation micropores are connected with the mesh structure in the sound-absorbing and noise-reducing layer.

[0010] In a more preferred embodiment, the mesh structure has irregular depressions on the wall surfaces at the bottom and top of the meshes.

[0011] In a preferred embodiment, the sound insulation and noise reduction layer is a mixed layer of floating beads and a base material; the base material is one or more of rock wool, mineral wool and glass wool; and the mass ratio of the floating beads to the base material is 0.8-1:3-5.

[0012] In a more preferred embodiment, the distribution of the floating beads on the sound insulation and noise reduction layer is as follows: gradually diffuse and decrease from the middle position of the sound insulation and noise reduction layer to both sides.

[0013] In a further preferred embodiment, 70% to 80% of the floating beads are concentrated and mixed in the middle position of the sound insulation and noise reduction layer, which accounts for 25% to 30% of the layer thickness.

[0014] In a preferred embodiment, the coating used in the shock-absorbing coating layer comprises, by mass percentage, 28-35% of polyurethane resin, 40-45% of epoxy resin, 15-25% of mineral wool and 2-5% of auxiliary materials.

[0015] In a preferred embodiment, both the surface layer and the base layer are cement mortar layers.

[0016] In a preferred embodiment, the thickness of the shock-absorbing coating layer accounts for 4-6% of the overall floor thickness;

[0017] and / or, the foamed concrete layer accounts for 15-20% of the overall floor slab thickness;

[0018] and / or, the thickness of the surface layer and the base layer each accounts for 5-8% of the thickness of the entire floor slab;

[0019] And / or, the thickness of the sound-absorbing and noise-reducing layer and the sound-insulating and noise-reducing layer each accounts for 30-35% of the thickness of the entire floor slab.

[0020] In a preferred embodiment, an asphalt layer is provided between the sound absorbing and noise reducing layer and the foamed concrete layer.

[0021] In a preferred embodiment, the outer sides and bottom of the floor slab are covered with an aluminum shell template, and the entire floor slab is formed on the aluminum shell template.

[0022] A method for preparing a combined vibration-absorbing and noise-reducing floor slab comprises the following steps:

[0023] S1. The inner surface of the aluminum shell formwork with folded edges on all sides is paved with cement mortar to form a base layer;

[0024] S2, coating the shock-absorbing coating on the base layer to form a shock-absorbing coating layer;

[0025] S3. When the shock-absorbing coating layer is not completely dry, a mixed material formed by mixing floating beads with a base material is used for laying to form a sound insulation and noise reduction layer; wherein the base material is one or more of rock wool, mineral wool and glass wool;

[0026] Moreover, the laying process is divided into two symmetrical stages: in the first stage of laying, the base material mixed with floating beads is directly laid on the surface of the shock-absorbing coating layer, and as the laying proceeds, the amount of floating beads mixed in the base material gradually increases; in the second stage of laying, the base material mixed with floating beads is directly laid on the surface laid in the first stage, and as the laying proceeds, the amount of floating beads mixed in the base material gradually decreases;

[0027] S4, first coating the polyurethane resin on the sound insulation and noise reduction layer, and quickly laying the cement fiberboard slurry when the coated polyurethane resin is not completely dry, so as to form a sound absorption and noise reduction layer;

[0028] The laying process is divided into two parts:

[0029] S41, after coating the polyurethane resin on the sound insulation and noise reduction layer, laying cement fiberboard slurry with half the thickness of the sound absorption and noise reduction layer, and then using a grid mold to press a connected grid structure on the incompletely formed cement fiberboard, and using thin steel bars to intersperse in the horizontal and vertical directions on the incompletely formed cement fiberboard to form air-permeable micropores connecting the grid structure with the outside of the side, thereby forming half of the sound absorption and noise reduction layer;

[0030] S42, separately laying cement fiberboard slurry using a template, and using the same grid mold and thin steel bars to press out a connected grid structure and air-permeable micropores connecting the grid structure with the outside of the side on the incompletely formed cement fiberboard, to form another half of the sound-absorbing and noise-reducing layer that is the same size and symmetrical to the half of the sound-absorbing and noise-reducing layer in S41;

[0031] S43, first apply polyurethane resin on the half of the sound absorbing and noise reduction layer that is completely formed in S41, and before the applied polyurethane resin is completely dry, quickly and symmetrically apply the other half of the sound absorbing and noise reduction layer that is completely formed in S42;

[0032] Wherein, the grid blocks of the grid mold have irregular protrusions facing the pressing direction;

[0033] S5, laying asphalt on the sound absorption and noise reduction layer, and laying foamed concrete before the asphalt solidifies to form a foamed concrete layer;

[0034] S6. When the foamed concrete layer is not completely dry, cement mortar is used to pave the surface layer;

[0035] S7, pressing the whole structure together and drying it until it is completely dry to obtain the combined shock-absorbing and noise-reducing floor slab.

[0036] In a preferred embodiment, in S3, the first and second stages of the laying of the sound insulation and noise reduction layer are specifically layered into multiple parts. First, the floating beads are divided into two equal parts, which are used for the laying of the first and second stages respectively, and the base material is divided into multiple equal parts corresponding to the number of layers of the multiple parts; in the laying of the first stage, the equal part of the floating beads is divided into several parts according to the gradient, and mixed with several equal parts of the base material to form several gradient mixed materials, and then the several gradient mixed materials are layered and laid on the shock-absorbing coating layer in order from small to large floating bead content; then, the laying of the second stage is carried out, and the same batching method is used to form several gradient mixed materials, and then the several gradient mixed materials are layered and laid on the sound insulation and noise reduction layer of the first stage in order from large to small floating bead content.

[0037] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0038] The combined shock-absorbing and noise-reducing floor slab of the present invention adopts a multi-layered integral structure, and has a foam concrete layer, a sound-absorbing and noise-reducing layer, a sound-insulating and noise-reducing layer, and a shock-absorbing coating layer between the surface layer and the base layer. Among them, the foam concrete layer has a large number of pores inside, which is not only light in weight, but also has good sound insulation and shock reduction effects; the sound-absorbing and noise-reducing layer has a large number of meshes, and the top and bottom of the meshes have irregular depressions, which has good sound absorption and noise reduction effects; the sound-insulating and noise-reducing layer is formed by a mixture of floating beads and base materials, and the hollow floating beads have effective resonance sound absorption and sound insulation effects, and the base material has good sound insulation effects; the shock-absorbing coating layer is formed by a mixture of resin and mineral wool, which not only has the function of a bonding layer, but also has good shock absorption and sound insulation and noise reduction effects. In addition, an asphalt layer is also provided between the sound-absorbing and noise-reducing layer and the foam concrete layer, which has good bonding effects and good shock absorption and noise reduction effects. By setting up various shock-absorbing structural layers, noise-reducing structural layers and shock-absorbing / noise-reducing composite structural layers, the combined floor slab can effectively insulate and reduce noise between upper and lower floors during use, and specifically has sound insulation and noise reduction effects in both directions between the upper and lower floors.

[0039] In addition, in the combined shock-absorbing and noise-reducing floor slab of the present invention, the surface layer and the base layer are both formed of cement mortar, which can ensure the hardness requirements of the upper and lower layers of the floor slab, and the shock-absorbing structural layer, noise reduction structural layer and shock-absorbing / noise reduction composite structural layer between the surface layer and the base layer are all formed of lightweight materials, and the overall structure from the surface layer to the base layer is formed and combined on an aluminum shell formwork, so that the overall floor slab maintains a low self-weight while having good load-bearing performance.

[0040] The preparation method of the present invention controls the process according to the structural characteristics of each layer of the combined vibration-damping and noise-reducing floor slab, and can effectively prepare a combined floor slab with good vibration-damping and noise-reducing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic cross-sectional structure diagram of the combined vibration-absorbing and noise-reducing floor slab of the present invention in a specific embodiment;

[0042] Figure 2 It is a schematic cross-sectional structure diagram of the sound-absorbing and noise-reducing layer in the combined vibration-absorbing and noise-reducing floor slab of the present invention in a specific embodiment;

[0043] Figure 3 It is a schematic diagram of the cross-sectional structure of the sound insulation and noise reduction layer in the combined vibration-absorbing and noise-reducing floor slab of the present invention in a specific embodiment;

[0044] The attached drawings are marked with: 1-surface layer, 2-foam concrete layer, 3-asphalt layer, 4-sound-absorbing and noise-reducing layer, 41-mesh, 410-irregular depressions, 42-breathable micropores, 5-sound-insulating and noise-reducing layer, 51-floating beads, 52-base material, 6-shock-absorbing coating layer, 7-base layer, 8-aluminum shell formwork. DETAILED DESCRIPTION

[0045] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments, but the protection scope and implementation mode of the present invention are not limited thereto. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0046] Furthermore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms "upper", "lower", etc. used herein in the specification of the present invention indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or an orientation or positional relationship in which the inventive product is usually placed when in use, and are only used to distinguish descriptions, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention, let alone an indication or implication of relative importance. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0047] See also Figure 1 The figure shows a combined vibration-absorbing and noise-reducing floor slab of the present invention. The floor slab comprises a surface layer 1 and a base layer 7. In a preferred embodiment, both the surface layer 1 and the base layer 7 are cement mortar layers.

[0048] Furthermore, a foamed concrete layer 2, a sound absorbing and noise reducing layer 4, a sound insulating and noise reducing layer 5, and a shock absorbing paint layer 6 are arranged between the surface layer 1 and the base layer 7. The foamed concrete layer 2, the sound absorbing and noise reducing layer 4, the sound insulating and noise reducing layer 5, and the shock absorbing paint layer 6 are sequentially arranged between the surface layer 1 and the base layer 7, that is, the floor slab specifically includes the surface layer 1, the foamed concrete layer 2, the sound absorbing and noise reducing layer 4, the sound insulating and noise reducing layer 5, the shock absorbing paint layer 6, and the base layer 7 from top to bottom, and each layer is combined with each other to form an integral structure.

[0049] In a preferred embodiment, the sound absorbing and noise reducing layer 4 is a cement fiber layer. Figure 2 As shown, the sound absorbing and noise reducing layer 4 has a mesh structure inside, wherein the meshes 41 of the mesh structure are interconnected. Moreover, the sound absorbing and noise reducing layer 4 is provided with air-permeable micropores 42 around it, and the air-permeable micropores 42 are connected to the mesh structure inside the sound absorbing and noise reducing layer 4.

[0050] The sound-absorbing and noise-reducing layer 4 has a mesh structure, and the mesh holes are axially oriented in the up-and-down direction, and the mesh holes are connected to the atmosphere through the breathable micropores 42, so that the mesh holes are filled with air; when sound passes through the sound-absorbing and noise-reducing layer 4, the mesh holes can weaken the energy of the sound waves, thereby absorbing the sound propagating up and down, thereby achieving the effect of noise reduction.

[0051] In a more preferred embodiment, see Figure 2As shown, the bottom and top walls of the mesh 41 of the mesh structure are provided with irregular depressions 410. The irregular depressions 40 can increase the propagation distance of the sound waves, so that the sound waves consume more energy when propagating through the sound absorbing and noise reducing layer 4, thereby achieving better sound absorbing and noise reducing effects.

[0052] In a preferred embodiment, see Figure 3 As shown, the sound insulation and noise reduction layer 5 is a mixed layer of floating beads 51 and base material 52; wherein the base material 52 is one or more of rock wool, mineral wool and glass wool; and the mass ratio of the floating beads 51 to the base material 52 is 0.8-1:3-5. The floating beads 51 are hollow inside, which not only has multiple characteristics such as light weight, high strength, wear resistance, high temperature resistance, thermal insulation, insulation and flame retardancy, but also can effectively ensure the strength of the structural layer and fireproof insulation; moreover, the hollow inside consumes a lot of energy when sound propagates through, and the sound waves are greatly weakened, which has a good sound insulation and noise reduction effect.

[0053] In a more preferred embodiment, the distribution of the floating beads 51 on the sound insulation and noise reduction layer 5 is as follows: gradually diffuse and decrease from the middle position of the sound insulation and noise reduction layer 5 to both sides. In this way, when the sound propagates through the sound insulation and noise reduction layer 5, whether it propagates from bottom to top or from top to bottom, the sound waves will be gradually and step-by-step weakened in the process of propagating through the sound insulation and noise reduction layer 5, and specifically, the weakening intensity will be stronger as the process of passing through the sound insulation and noise reduction layer 5 goes deeper and is strongest when it reaches the center position, and after passing the center position, it will gradually become smaller as the distance goes farther. By adopting this structural design of gradient arrangement of the floating beads 51, the sound waves can be weakened in a gradient weakening manner, which can save materials to the greatest extent while effectively ensuring the isolation of sound wave transmission, and achieve good sound insulation and noise reduction effects.

[0054] Moreover, in a further preferred embodiment, 70% to 80% of the floating beads 51 are concentrated and mixedly distributed in the middle position of the sound insulation and noise reduction layer 5, which accounts for 25% to 30% of the layer thickness.

[0055] In a preferred embodiment, the coating used in the shock-absorbing coating layer 6 comprises, by mass percentage, 28-35% of polyurethane resin, 40-45% of epoxy resin, 15-25% of mineral wool and 2-5% of auxiliary materials, wherein the auxiliary materials specifically include one or more of a curing agent, a thickener, a dispersant, a leveling agent and an anti-wear agent.

[0056] The shock-absorbing coating layer 6 adopts polyurethane resin and epoxy resin with good adhesion as coating, which has good adhesion, so that the sound insulation and noise reduction layer 5 and the base layer 7 have good overall stability; at the same time, the mineral wool 5 in the formed shock-absorbing coating layer 6 has a corresponding shock-absorbing effect, so that the shock-absorbing coating layer 6 has the effect of both shock absorption and noise reduction.

[0057] In a preferred embodiment, the thickness of the shock-absorbing coating layer accounts for 4-6% of the overall floor thickness;

[0058] and / or, the foamed concrete layer accounts for 15-20% of the overall floor slab thickness;

[0059] and / or, the thickness of the surface layer and the base layer each accounts for 5-8% of the thickness of the entire floor slab;

[0060] And / or, the thickness of the sound-absorbing and noise-reducing layer and the sound-insulating and noise-reducing layer each accounts for 30-35% of the thickness of the entire floor slab.

[0061] In addition, in a preferred embodiment, an asphalt layer 3 is provided between the sound absorbing and noise reducing layer 4 and the foamed concrete layer 2. The asphalt layer 3 can well bond the sound absorbing and noise reducing layer 4 and the foamed concrete layer 2, so that the two structural layers have good overall stability. At the same time, the asphalt layer 3 also has a good damping and shock absorbing effect, and has a corresponding effect on shock absorption and noise reduction. In a specific embodiment, the thickness of the asphalt layer 3 is 2 to 3 mm.

[0062] In a preferred embodiment, the outer sides and bottom of the floor slab are covered with an aluminum shell template 8, and the entire floor slab is formed on the aluminum shell template 8. The aluminum shell template 8 is not only light in weight, but also has corresponding strength. The entire floor slab is formed on the aluminum shell template 8, which is conducive to maintaining the shape and stability of the entire floor slab, and has good load-bearing performance while the self-weight of the entire floor slab does not increase greatly.

[0063] In addition, through holes corresponding to the ventilating micropores 42 are provided on the aluminum shell template 8 so that the ventilating micropores 42 can maintain communication with the atmosphere and avoid the ventilating micropores 42 being blocked.

[0064] Embodiments 1 to 4

[0065] The structures of the combined vibration-damping and noise-reducing floor slabs of Examples 1 to 4 are shown in Table 1.

[0066]

[0067] The combined vibration-damping and noise-reducing floor slabs of Examples 1 to 4 are prepared according to the following method, which specifically includes the following steps:

[0068] S1. The inner surface of the aluminum shell formwork with folded edges on all sides is paved with cement mortar to form a base layer.

[0069] S2. Mixing polyurethane resin, epoxy resin, mineral wool and auxiliary materials to form a shock-absorbing coating, and coating the shock-absorbing coating on the base layer to form a shock-absorbing coating layer.

[0070] S3. When the shock-absorbing coating layer is not completely dry, a mixed material formed by mixing floating beads with a base material is used for laying to form a sound insulation and noise reduction layer; the shock-absorbing coating layer has a good bonding effect, so that the sound insulation and noise reduction layer and the shock-absorbing coating layer are well combined; wherein the base material is one or more of rock wool, mineral wool and glass wool;

[0071] Moreover, the laying process is divided into two symmetrical stages: in the first stage, the base material mixed with floating beads is laid directly on the surface of the shock-absorbing coating layer, and as the laying progresses, the amount of floating beads mixed in the base material gradually increases; in the second stage, the base material mixed with floating beads is laid directly on the surface laid in the first stage, and as the laying progresses, the amount of floating beads mixed in the base material gradually decreases.

[0072] During the preparation of the composite floor slabs of Examples 1 to 4, the laying of the first and second stages of the sound insulation and noise reduction layer is specifically carried out in three layers. First, the floating beads are divided into two equal parts, which are used for the laying of the first and second stages respectively, and the base material is divided into six equal parts; in the laying of the first stage, the floating beads are divided into three equal parts according to the ratio of 1:3:10, and are mixed with the three equal parts of the base material to form three gradients of mixed materials, and then the three gradients of mixed materials are layered and laid on the shock-absorbing coating layer in order from small to large floating beads content; then, the second stage of laying is carried out, and the same batching method is used to form three gradients of mixed materials, and then the three gradients of mixed materials are layered and laid on the sound insulation and noise reduction layer of the first stage in order from large to small floating beads content. In this way, the overall laying of the sound insulation and noise reduction layer is completed, and the distribution of the floating beads on the sound insulation and noise reduction layer is gradually diffused and reduced from the middle position of the sound insulation and noise reduction layer to both sides.

[0073] S4, first coating the sound insulation and noise reduction layer with polyurethane resin, and quickly laying cement fiberboard slurry when the coated polyurethane resin is not completely dry, so as to form a sound absorption and noise reduction layer; polyurethane resin has good bonding effect, and coating the polyurethane resin on the sound insulation and noise reduction layer and then laying the sound absorption and noise reduction layer can make the sound insulation and noise reduction layer firmly bonded with the sound absorption and noise reduction layer, so that the overall structure is more stable;

[0074] The laying process is divided into two parts:

[0075] S41, after coating the polyurethane resin on the sound insulation and noise reduction layer, laying cement fiberboard slurry with half the thickness of the sound absorption and noise reduction layer, and then using a grid mold to press a connected grid structure on the incompletely formed cement fiberboard, and using thin steel bars to intersperse in the horizontal and vertical directions on the incompletely formed cement fiberboard to form air-permeable micropores connecting the grid structure with the outside of the side, thereby forming half of the sound absorption and noise reduction layer;

[0076] S42, separately laying cement fiberboard slurry using a template, and using the same grid mold and thin steel bars to press out a connected grid structure and air-permeable micropores connecting the grid structure with the outside of the side on the incompletely formed cement fiberboard, to form another half of the sound-absorbing and noise-reducing layer that is the same size and symmetrical to the half of the sound-absorbing and noise-reducing layer in S41;

[0077] S43, first coating the polyurethane resin on the half of the sound absorbing and noise reduction layer that is completely formed in S41, and before the coated polyurethane resin is completely dry, quickly and symmetrically coating the other half of the sound absorbing and noise reduction layer that is completely formed in S42; wherein the polyurethane resin can firmly bond the two halves of the sound absorbing and noise reduction layer, so that the overall structure of the sound absorbing and noise reduction layer remains stable;

[0078] Among them, the grid mold has multiple grid blocks, the size of the grid blocks corresponds to the mesh size in the sound-absorbing and noise-reducing layer; adjacent grid blocks are connected by connecting rods with a diameter close to the diameter of the thin steel bars, so that the meshes in the pressed mesh structure are interconnected; and, the grid blocks of the grid mold have irregular protrusions facing the pressing direction, so that corresponding irregular protrusions can be generated during pressing.

[0079] S5. Asphalt is laid on the sound-absorbing and noise-reducing layer, and foamed concrete is laid before the asphalt solidifies to form a foamed concrete layer. The asphalt layer formed by laying asphalt has the function of shock absorption and noise reduction, and can also achieve a good combination of the foamed concrete layer and the sound-absorbing and noise-reducing layer.

[0080] S6. When the foamed concrete layer is not completely dry, cement mortar is used to pave it to form a surface layer; and the surface layer is laid when the foamed concrete layer is not completely dry, so that the surface layer and the foamed concrete layer are well combined.

[0081] S7, pressing the whole structure together and drying it until it is completely dry to obtain the combined shock-absorbing and noise-reducing floor slab.

[0082] 1. Impact sound improvement test

[0083] The combined vibration-damping and noise-reducing floor slabs of Examples 1 to 4 were measured according to the detection method of GB / T 19889.7-2005 "Acoustic Building and Building Component Sound Insulation Measurement Part 7: Field Measurement of Floor Impact Sound Insulation", and were judged according to GB50118-2010 "Civil Building Sound Insulation Design Code", and the sound insulation measurement record results are shown in Table 2.

[0084] Table 2 Floor impact sound insulation test records

[0085]

[0086]

[0087] It can be seen from the results in Table 2 that the measured floor impact sound insulation performance meets the standard requirements for floor impact sound insulation between living rooms in residential buildings in GB 50118-2010 "Code for Design of Sound Insulation for Civil Buildings" (weighted standardized impact sound pressure level ≤ 75dB).

[0088] It can be seen that the combined shock-absorbing and noise-reducing floor slab of the present invention has good sound insulation and noise reduction effects, especially for the impact sound of the floor slab, it has excellent dual noise reduction effects of sound insulation and shock absorption and noise reduction. It can be used between the floor slabs of the floors to effectively perform floor sound insulation, thereby effectively avoiding noise transmission between floors, which is conducive to creating a quiet and comfortable living environment for people.

[0089] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, this specification does not describe all possible combinations of the technical features in the above-described embodiments. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. Moreover, the above-described embodiments only express several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, several variations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A combined vibration-absorbing and noise-reducing floor slab, characterized in that: It comprises a surface layer and a base layer; a foamed concrete layer, a sound absorption and noise reduction layer, a sound insulation and noise reduction layer and a shock-absorbing paint layer are arranged between the surface layer and the base layer; the foamed concrete layer, the sound absorption and noise reduction layer, the sound insulation and noise reduction layer and the shock-absorbing paint are arranged in sequence between the surface layer and the base layer; and the layers between the surface layer and the base layer are combined with each other to form an integral structure; The sound-absorbing and noise-reducing layer is a cement fiber layer; the interior of the sound-absorbing and noise-reducing layer has a mesh structure; the meshes of the mesh structure are interconnected; and the sound-absorbing and noise-reducing layer is provided with air-permeable micropores around it; The air permeable micropores are connected to the mesh structure in the sound absorbing and noise reducing layer; The mesh structure has irregular depressions on the bottom and top walls of the meshes; An asphalt layer is also provided between the sound absorbing and noise reducing layer and the foam concrete layer.

2. A combined vibration-absorbing and noise-reducing floor slab according to claim 1, characterized in that: The sound insulation and noise reduction layer is a mixed layer of floating beads and a base material; the base material is one or more of rock wool, mineral wool and glass wool; and the mass ratio of the floating beads to the base material is 0.8~1:3~5.

3. A combined vibration-absorbing and noise-reducing floor slab according to claim 2, characterized in that: The distribution of the floating beads on the sound insulation and noise reduction is as follows: they gradually diffuse and decrease from the middle position of the sound insulation and noise reduction to both sides.

4. The combined vibration-absorbing and noise-reducing floor slab according to claim 1, characterized in that: The coating used in the shock-absorbing coating layer comprises, by mass percentage, 28-35% of polyurethane resin, 40-45% of epoxy resin, 15-25% of mineral wool and 2-5% of auxiliary materials.

5. The combined vibration-absorbing and noise-reducing floor slab according to claim 1, characterized in that: The surface layer and the base layer are both cement mortar layers.

6. A combined vibration-absorbing and noise-reducing floor slab according to any one of claims 1 to 5, characterized in that: The outside and bottom of the floor slab are covered with aluminum shell templates, and the entire floor slab is formed on the aluminum shell templates.

7. A method for preparing a combined vibration-damping and noise-reducing floor slab, characterized in that: The steps include: S1. The inner surface of the aluminum shell formwork with folded edges on all sides is paved with cement mortar to form a base layer; S2, coating the shock-absorbing coating on the base layer to form a shock-absorbing coating layer; S3. When the shock-absorbing coating layer is not completely dry, a mixed material formed by mixing floating beads with a base material is used for laying to form a sound insulation and noise reduction layer; wherein the base material is one or more of rock wool, mineral wool and glass wool; Moreover, the laying process is divided into two symmetrical stages: in the first stage of laying, the base material mixed with floating beads is directly laid on the surface of the shock-absorbing coating layer, and as the laying proceeds, the amount of floating beads mixed in the base material gradually increases; in the second stage of laying, the base material mixed with floating beads is directly laid on the surface laid in the first stage, and as the laying proceeds, the amount of floating beads mixed in the base material gradually decreases; S4, first coating the polyurethane resin on the sound insulation and noise reduction layer, and quickly laying the cement fiberboard slurry when the coated polyurethane resin is not completely dry, so as to form a sound absorption and noise reduction layer; The laying process is divided into two parts: S41, after coating the polyurethane resin on the sound insulation and noise reduction layer, laying cement fiberboard slurry with half the thickness of the sound absorption and noise reduction layer, and then using a grid mold to press a connected grid structure on the incompletely formed cement fiberboard, and using thin steel bars to intersperse in the horizontal and vertical directions on the incompletely formed cement fiberboard to form air-permeable micropores connecting the grid structure with the outside of the side, thereby forming half of the sound absorption and noise reduction layer; S42, separately laying cement fiberboard slurry using a template, and using the same grid mold and thin steel bars to press out a connected grid structure and air-permeable micropores connecting the grid structure with the outside of the side on the incompletely formed cement fiberboard, to form another half of the sound-absorbing and noise-reducing layer that is the same size and symmetrical to the half of the sound-absorbing and noise-reducing layer in S41; S43, first apply polyurethane resin on the half of the sound absorbing and noise reduction layer that is completely formed in S41, and before the applied polyurethane resin is completely dry, quickly and symmetrically apply the other half of the sound absorbing and noise reduction layer that is completely formed in S42; Wherein, the grid blocks of the grid mold have irregular protrusions facing the pressing direction; S5, laying asphalt on the sound absorption and noise reduction layer, and laying foamed concrete before the asphalt solidifies to form a foamed concrete layer; S6. When the foamed concrete layer is not completely dry, cement mortar is used to pave the surface layer; S7, pressing the whole structure together and drying it until it is completely dry to obtain the combined shock-absorbing and noise-reducing floor slab.

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