Residence separating wall based on ALC plates and sound insulation construction method of residence separating wall

Abstract

The invention discloses a residence separating wall based on ALC plates and a sound insulation construction method of the residence separating wall. The separating wall comprises a base layer wall body formed by directly splicing and butting a plurality of autoclaved aerated concrete plates with the thickness of 70-80 mm, and the splicing seams do not contain sealing materials; supporting frames are arranged on the two opposite sides of the base layer wall body respectively, and a cavity layer with the thickness ranging from 50 mm to 70 mm is formed between the supporting frame on each side and the base layer wall body. Rock wool with the thickness of 25-40 mm and the density of 35-45 kg / m is arranged in the cavity layer; at least two layers of gypsum boards installed in a staggered mode are fixed to the outer side of the supporting frame on each side. Through systematic parameter optimization of a multi-quality-spring-quality sound insulation structure, the separating wall can still stably reach the sound insulation performance index that Rw + Ctr is larger than or equal to 50 dB under the condition that abutted seams do not need to be sealed, the traditional sealing and gluing procedure is omitted, the problem of sound insulation degradation caused by aging and failure of sealant is solved, and the sound insulation performance of the separating wall is improved. The technical effects that construction parameters are reasonable, construction is convenient and fast, cost is controllable, and sound insulation performance is stable for a long time are achieved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a residential partition wall based on ALC panels and its sound insulation construction method. Background Technology

[0002] In modern residential buildings, especially steel-structured buildings, partition walls not only need to comply with strict fire protection and fire resistance regulations, but also must meet high standards of sound insulation performance. Autoclaved aerated concrete (ALC) panels are widely used for partition walls due to their excellent fire resistance and lightweight properties. However, due to limitations imposed by the law of mass, the sound insulation performance of a single ALC panel wall often falls short of these high standards.

[0003] To improve the overall sound insulation of walls, the current common practice is to add an interior wall on both sides of the ALC panel, consisting of a light steel frame, gypsum board, and sound-absorbing materials (such as rock wool). However, the specific structural parameters of the interior wall (such as the thickness of the air gap, the number and type of gypsum board layers, and the density and specifications of the sound-absorbing materials) have a significant impact on the final sound insulation effect. Due to the lack of systematic parameter optimization, existing practices often suffer from the problems of blindly piling up materials and excessively high costs. More importantly, in traditional construction processes, to prevent sound wave penetration, the joints between adjacent ALC panels must be strictly sealed with caulking. This joint sealing process is cumbersome, greatly reducing construction efficiency; and in actual projects, problems such as incomplete sealing and subsequent aging and failure of the sealant are very likely to occur, resulting in a serious decline in the sound insulation performance of the wall. Summary of the Invention

[0004] The main objective of this invention is to provide a residential partition wall based on ALC panels and its sound insulation construction method to solve the above-mentioned technical problems.

[0005] In a first aspect, the present invention provides a residential partition wall based on ALC panels, comprising a base wall, wherein the base wall is composed of multiple autoclaved aerated concrete (AAC) panels with a thickness of 70-80mm spliced ​​together, with adjacent AAC panels directly butted together, and the joints between adjacent AAC panels do not contain sealing material; support frames are respectively provided on opposite sides of the base wall, and a cavity layer with a thickness of 50-70mm is formed between each support frame and the base wall; rock wool is provided in the cavity layer, the rock wool having a thickness of 25-40mm and a density of 35-45kg / m³; at least two layers of gypsum board are fixed on the side of each support frame away from the base wall, and the different layers of gypsum board on the same side are installed in a staggered manner.

[0006] Secondly, the present invention also provides a sound insulation construction method for a residential partition wall based on ALC board as described in the first aspect, comprising the following steps: S1, vertically installing autoclaved aerated concrete (AAC) boards with a thickness of 70-80 mm at the partition wall position, with adjacent AAC boards directly joined together without sealing or filling the joints to form a base wall; S2, constructing support frames on opposite sides of the base wall, forming a cavity layer with a thickness of 50-70 mm between each support frame and the base wall; S3, filling the cavity layers on both sides with rock wool with a thickness of 25-40 mm and a density of 35-45 kg / m³; S4, fixing at least two layers of gypsum board on the outside of each support frame, ensuring that the gypsum board layers on the same side are staggered.

[0007] The beneficial technical effects of this invention are as follows: The residential partition wall based on ALC board provided by this invention achieves a multi-mass-spring-mass sound insulation structure by systematically optimizing the structural parameters of a base wall composed of a 70-80mm thick autoclaved aerated concrete board, two 50-70mm thick cavity layers on both sides containing 25-40mm thick rock wool with a density of 35-45kg / m³, and at least two layers of staggered gypsum board on both sides. The base wall and the two layers of gypsum board on both sides constitute three mass layers, while the two cavity layers containing rock wool on both sides constitute two spring layers. Sound waves passing through the partition wall must pass through the alternating attenuation of the multiple mass layers and the spring layers, achieving efficient isolation of broadband sound waves and stably reaching a high sound insulation performance index of Rw+Ctr≥50dB. Meanwhile, with the combination of the cavity layer, rock wool, and multi-layer gypsum board with the aforementioned specific parameters, the combination of the cavity layer and rock wool on both sides can effectively attenuate the sound energy leaking through the joints. The mass layer and staggered joint structure of the multi-layer gypsum board further block the propagation path of sound waves, so that the joints between adjacent autoclaved aerated concrete panels do not need to be filled with any sealing material, and the entire partition wall can still meet the sound insulation performance requirements. This eliminates the cumbersome sealing and caulking process in traditional processes, significantly simplifies the construction process, and improves construction efficiency. Moreover, it fundamentally avoids the problem of sound insulation performance deterioration caused by poor sealing construction quality or aging and failure of sealant, ensuring long-term stable and reliable sound insulation performance of the wall. In addition, the various structural parameters have been systematically optimized, avoiding the blind stacking of materials while meeting high sound insulation performance indicators. All materials used are conventional building materials with wide availability, achieving a comprehensive effect of reasonable structural parameters, convenient construction, and controllable costs. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1a This is a schematic diagram of the partition wall structure provided in an embodiment of the present invention;

[0010] Figure 1b for Figure 1a Enlarged diagram of A in the middle;

[0011] Figure 1c This is a schematic diagram of the base wall and its adjacent structure in the partition wall provided in an embodiment of the present invention;

[0012] Figure 2 This is a schematic diagram of the A1 scheme provided in an embodiment of the present invention;

[0013] Figure 3 This is a schematic diagram of the simulation of scheme A2 provided in an embodiment of the present invention;

[0014] Figure 4 This is a schematic diagram of the A3 scheme provided in an embodiment of the present invention;

[0015] Figure 5 This is a schematic diagram of the A4 scheme provided in an embodiment of the present invention;

[0016] Figure 6 This is a schematic diagram of the B1 scheme provided in an embodiment of the present invention;

[0017] Figure 7 This is a schematic diagram of the B2 scheme provided in an embodiment of the present invention;

[0018] Figure 8 This is a schematic diagram of the construction method provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] In the diagram: 10-base wall, 20-autoclaved aerated concrete board, 30-cavity layer, 40-rock wool, 50-support frame, 60-web plate, 70-first flange, 80-second flange, 90-gypsum board, 91-finishing layer, 100-rubber pad. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0023] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0025] Please also refer to Figures 1a-7 This invention provides a residential partition wall based on ALC panels, primarily used in residential buildings, apartment buildings, and other structures requiring high standards of sound insulation and fire resistance. This partition wall fully utilizes the fire-resistant advantages of autoclaved aerated concrete (AAC) panels 20, and through a specific combination and parameter construction of cavities, sound-absorbing materials, and multi-layer panels, achieves excellent sound insulation performance while ensuring ease of construction. The partition wall includes a base wall 10, which is composed of multiple autoclaved aerated concrete (AAC) panels 20 with a thickness of 70-80mm spliced ​​together. Adjacent AAC panels 20 are directly butted together, and the joints between adjacent AAC panels 20 do not contain any sealing material. Support frames 50 are respectively provided on opposite sides of the base wall 10, and a cavity layer 30 with a thickness of 50-70mm is formed between each support frame 50 and the base wall 10. Rock wool 40 is provided in the cavity layer 30, and the rock wool 40 has a thickness of 25-40mm and a density of 35-45kg / m³. At least two layers of gypsum board 90 are fixed on the side of each support frame 50 away from the base wall 10, and the different layers of gypsum board 90 on the same side are installed in a staggered manner.

[0026] In this embodiment, the partition wall includes a base wall 10 and support frames 50, rock wool 40 and gypsum board 90 respectively disposed on opposite sides of the base wall 10.

[0027] The base wall 10 is the load-bearing and sound insulation component of the entire partition wall. The base wall 10 is constructed from multiple autoclaved aerated concrete (AAC) panels 20 (i.e., ALC panels). The thickness of the AAC panels 20 is 70–80 mm. Due to its numerous uniformly distributed pores, the AAC panels 20 are lightweight and possess excellent fire resistance, making them suitable for residential partition walls with strict fire rating requirements.

[0028] In this embodiment, multiple autoclaved aerated concrete (AAC) panels 20 are vertically arranged and installed sequentially along the length of the partition wall. Adjacent AAC panels 20 are connected by direct jointing, meaning that the side surfaces of adjacent AAC panels 20 are directly abutted and joined together, and no sealing material (e.g., no sealant, sealing strip, or other form of sealant) is used at the joints between the panels.

[0029] It should be noted that in traditional ALC panel partition wall construction, strict sealing and caulking of the joints between adjacent ALC panels are usually required to prevent sound waves from propagating through the gaps. This sealing process is not only complex and inefficient, but also prone to problems such as incomplete sealing and sealant aging and failure over time, leading to a decline in the wall's sound insulation performance. However, this embodiment optimizes the overall structure of the partition wall. With a combination of cavity layers 30, rock wool 40, and multi-layer gypsum board 90 with specific parameters on both sides of the base wall 10, the joints between adjacent autoclaved aerated concrete panels 20 do not require any sealing material, and the entire partition wall still achieves a sound insulation performance requirement of Rw+Ctr≥50dB. This is because the combination of the cavity layers 30 and rock wool 40 effectively attenuates sound energy leaking through the joints, and the mass layer and staggered joint structure of the multi-layer gypsum board 90 further block the sound wave propagation path. Therefore, even without sealing at the joints, the sound insulation performance of the entire wall system is not significantly affected. This significantly simplifies the construction process, improves construction efficiency, and avoids the problem of deterioration in sound insulation performance caused by poor sealant application or aging.

[0030] Support frames 50 are provided on opposite sides of the base wall 10. A cavity layer 30 with a thickness of 50-70mm is formed between each support frame 50 and the base wall 10. That is, a set of support frames 50 is provided on one side of the base wall 10, and a cavity layer 30 is formed between the support frame 50 on this side and the surface of the base wall 10; a set of support frames 50 is also provided on the other side of the base wall 10, and a cavity layer 30 is also formed between the support frame 50 on this side and the surface of the base wall 10.

[0031] The cavity layer 30 acts as an air spring in the partition wall. According to the mass-spring-mass sound insulation principle, when sound waves enter the partition wall from one side, they first pass through the outer plasterboard 90 (mass layer), and then enter the cavity layer 30 (spring layer). The air within the cavity layer 30 acts as an elastic medium, attenuating the sound energy. Subsequently, the sound waves are attenuated again when they reach the base wall 10 (mass layer). Through the series combination of multiple mass-spring systems, effective isolation of sound waves, especially mid-to-low frequency sound waves, is achieved. The thickness of the cavity layer 30 is 50–70 mm. This thickness range balances sound insulation performance with the economy of the overall thickness of the partition wall, ensuring that the cavity layer 30 provides sufficient air spring effect while avoiding excessive loss of usable indoor space due to excessive wall thickness.

[0032] Rock wool 40 is installed inside the cavity layer 30. The thickness of rock wool 40 is 25-40 mm, and the density is 35-45 kg / m³. Rock wool 40 is installed inside the cavity layer 30, but the thickness of rock wool 40 is less than the thickness of the cavity layer 30. Therefore, rock wool 40 does not completely fill the entire cavity layer 30 space, and there are still some air gaps between rock wool 40 and the surface of the base wall 10 or between rock wool 40 and gypsum board 90.

[0033] Rock wool 40, acting as a sound-absorbing material, is placed within the cavity layer 30 to absorb and attenuate sound energy within it. When sound waves enter the cavity layer 30, they cause air molecules to vibrate. As these air molecules move through the tiny pores between the rock wool fibers, they encounter frictional resistance, converting sound energy into heat and dissipating it. This effectively reduces sound wave reflection and resonance within the cavity layer 30. The density of rock wool 40 is 35–45 kg / m³, a density range that allows the internal fiber arrangement to have appropriate porosity and flow resistance characteristics, enabling effective absorption of sound waves across a wide frequency range. The thickness of rock wool 40 is 25–40 mm, which, combined with the 50–70 mm thickness of the cavity layer 30, ensures that the cavity layer 30 contains both rock wool 40 sound-absorbing material areas and air gaps. The synergistic effect of these two elements further enhances the sound energy attenuation effect of the cavity layer 30.

[0034] At least two layers of gypsum board 90 are fixed to the side of each support frame 50 away from the base wall 10. That is, on each side of the base wall 10, a finishing base consisting of at least two layers of gypsum board 90 is installed on the side of the support frame 50 facing the interior space.

[0035] As the outermost mass layer of the partition wall, gypsum board 90 plays a crucial role in sound wave isolation. Using at least two layers of gypsum board 90, compared to a single layer, significantly increases the surface density of the outer mass layer, effectively improving sound insulation performance. Simulation test data shows that, under the same conditions of base wall 10, cavity layer 30, and rock wool 40 configuration, changing the gypsum board 90 on each side from a single layer to a double layer significantly improves sound insulation performance. A single-layer gypsum board 90 construction is insufficient to meet the sound insulation requirement of Rw+Ctr≥50dB. Therefore, at least two layers of gypsum board 90 on each side are one of the key structural elements for achieving high sound insulation performance in the partition wall of this embodiment.

[0036] Furthermore, the gypsum boards 90 on the same side are installed with staggered joints. Specifically, in each side of the multi-layer gypsum board 90, the joints between adjacent panels of the inner layer (the layer closest to the support frame 50) and the outer layer (the layer furthest from the support frame 50) are staggered during installation; that is, the joints between the inner and outer layers of gypsum board 90 do not coincide. The purpose of this staggered installation is to avoid forming a continuous gap channel that runs through the thickness of the multi-layer gypsum board 90. If the joints of different layers of gypsum board 90 are aligned, sound waves may propagate directly to the other side along this through gap, forming a sound bridge and causing a decrease in sound insulation performance. By staggering the joints, after the sound waves pass through the joint of one layer of gypsum board 90, they are blocked by the surface of the next layer of gypsum board 90 and must detour to continue propagating, thus lengthening the sound wave propagation path, effectively blocking the sound bridge effect, and ensuring the sound insulation integrity of the multi-layer gypsum board 90 structure.

[0037] In summary, the layered structure of the residential partition wall based on ALC board in this embodiment, from one side to the other along the thickness direction, is as follows: at least two layers of gypsum board 90 (staggered installation) → support frame 50 → cavity layer 30 (containing rock wool) → base wall 10 (composed of multiple autoclaved aerated concrete boards 20 directly spliced ​​together, without sealing material at the joints) → cavity layer 30 (containing rock wool) → support frame 50 → at least two layers of gypsum board 90 (staggered installation).

[0038] The partition wall forms a multi-mass-spring-mass sound insulation structure consisting of "90 layers of multi-layer gypsum board—40 layers of air / rock wool—ALC board—40 layers of air / rock wool—90 layers of multi-layer gypsum board". The base wall 10 (autoclaved aerated concrete board) and the multi-layer gypsum board 90 on both sides together constitute three mass layers, while the two cavity layers 30 (containing rock wool) constitute two spring layers. When sound waves pass through the partition wall, they must pass through the alternating attenuation of the multi-mass layers and spring layers in sequence. Each transition at the mass-spring interface causes sound energy reflection and loss, thereby achieving efficient isolation of broadband sound waves.

[0039] Furthermore, the thickness of the autoclaved aerated concrete (AAC) panel 20 is set to 70–80 mm, which ensures sufficient surface density of the base wall 10 to provide basic sound insulation performance while also considering lightweight and economic requirements. The thickness of the cavity layer 30 is set to 50–70 mm, controlling the total wall thickness while ensuring the air spring effect. The rock wool 40 has a thickness of 25–40 mm and a density of 35–45 kg / m³, providing effective sound energy absorption within the cavity layer 30. The staggered installation of at least two layers of gypsum board 90 on each side provides sufficient surface density and sound insulation integrity for the outer mass layer. The synergistic optimization of the above structural parameters enables the entire partition wall to stably achieve a sound insulation performance index of Rw+Ctr≥50 dB without filling the spaces between the AAC panels 20 with sealant, while also achieving convenient construction and controllable costs.

[0040] In one embodiment, the cavity layers 30 on both sides of the base wall 10 have the same thickness, and the cavity layers 30 on both sides are symmetrically arranged relative to the base wall 10.

[0041] In this embodiment, the thickness of the cavity layer 30 formed between one side of the support frame 50 and the surface of the base wall 10 is equal to the thickness of the cavity layer 30 formed between the other side of the support frame 50 and the surface of the base wall 10. For example, if the thickness of one cavity layer 30 is 50mm, the thickness of the other cavity layer 30 is also 50mm; if the thickness of one cavity layer 30 is 60mm, the thickness of the other cavity layer 30 is also 60mm; if the thickness of one cavity layer 30 is 70mm, the thickness of the other cavity layer 30 is also 70mm. The two cavity layers 30 are mirror-symmetrically distributed with the central plane of the base wall 10 as the plane of symmetry, that is, the two cavity layers 30 are symmetrical about the base wall 10 in terms of thickness and spatial position.

[0042] It should be noted that in some alternative solutions, the cavity layers 30 on both sides of the base wall 10 can also be asymmetrically arranged, that is, the thicknesses of the cavity layers 30 on both sides are not equal. Simulation test data shows that both the asymmetrical cavity layer 30 structure and the symmetrical cavity layer 30 structure can meet the sound insulation performance requirement of Rw+Ctr≥50dB.

[0043] The symmetrical cavity layer 30 construction ensures that the overall structure of the partition wall is symmetrically distributed around the base wall 10. The entire wall system, along its thickness, has the following layered structure from one side to the other: at least two layers of gypsum board 90 → support frame 50 → cavity layer 30 (including rock wool) → base wall 10 → cavity layer 30 (including rock wool) → support frame 50 → at least two layers of gypsum board 90. In this symmetrical structure, sound waves, regardless of which side of the partition wall they enter from, experience the exact same mass-spring-mass sound insulation path. Therefore, the partition wall provides equal sound insulation protection for adjacent households on both sides, and there is no situation where one side has better sound insulation performance than the other. This is more reasonable for the usage requirements of residential partition walls.

[0044] The symmetrical structure simplifies construction. Since the cavity layers 30 on both sides of the base wall 10 have the same thickness, the installation and positioning dimensions of the support frames 50 on both sides are consistent during construction. The cutting and filling methods of the rock wool 40 on both sides can also adopt the same operating specifications. There is no need to formulate different construction parameters and construction procedures for each side, thereby reducing the complexity of construction, reducing the risk of construction errors caused by different parameters on both sides, and improving construction efficiency and quality control.

[0045] Furthermore, compared to the asymmetrical cavity layer 30 structure, the symmetrical cavity layer 30 structure results in a smaller overall wall thickness under the same sound insulation performance. This is because in the asymmetrical structure, the thickness of the cavity layers 30 on both sides is unequal, and the thickness of the larger cavity layer 30 increases the total wall thickness. In the symmetrical structure, the thickness of the cavity layers 30 on both sides is the same. Under the premise that the total thickness of the cavity layers 30 on both sides remains unchanged, the symmetrical distribution results in a moderate thickness of the cavity layer 30 on each side, eliminating the need for excessively thick cavities on one side, thus effectively controlling the total wall thickness and reducing the occupancy of the interior space. Comparative simulation test data shows that the difference in sound insulation performance between the symmetrical cavity structure (the thickness of the cavity layers 30 on both sides is in the range of 50-70mm) and the asymmetrical cavity structure is small, both meeting the sound insulation performance requirement of Rw+Ctr≥50dB. However, the symmetrical structure has a greater advantage in terms of total wall thickness.

[0046] In summary, the residential partition wall based on ALC board in this embodiment achieves a comprehensive technical effect by setting the hollow layers 30 on both sides to have the same thickness and symmetrical with respect to the base wall 10, while ensuring that the sound insulation performance meets the requirements. This achieves equal sound insulation protection on both sides, convenient and unified construction, simplified material specifications, and controllable total wall thickness.

[0047] In one embodiment, the autoclaved aerated concrete slab 20 has a thickness of 75 mm; the cavity layer 30 formed between the support frame 50 on each side and the base wall 10 has a thickness of 55 mm; and the rock wool 40 has a thickness of 32 mm and a density of 40 kg / m³.

[0048] In this embodiment, the thickness of the autoclaved aerated concrete panel 20 is preferably 75 mm, and the selection of this thickness is based on a comprehensive consideration of sound insulation performance and economy.

[0049] To verify the impact of different autoclaved aerated concrete (AAC) panel thicknesses on the sound insulation performance of partition walls, this embodiment conducted sound insulation performance simulation tests on various structural schemes. Among them:

[0050] Under the same internal structural conditions (double-sided cavity containing rock wool 40, double-layer gypsum board), the scheme using 75mm thick autoclaved aerated concrete board 20 (corresponding to) Figure 4 The simulated sound insulation performance (Rw+Ctr value) of scheme A3 shown reaches 52dB, meeting the sound insulation performance requirement of Rw+Ctr≥50dB. Meanwhile, the scheme using 80mm thick autoclaved aerated concrete panels 20 (corresponding to...) Figure 7 The simulated sound insulation performance (Rw+Ctr) of scheme B2 shown is 55dB. A comparison shows that while increasing the thickness of the autoclaved aerated concrete (AAC) panel 20 from 75mm to 80mm improves sound insulation performance under similar interior construction conditions, both still meet the sound insulation performance requirement of Rw+Ctr≥50dB. This is because the surface density of the 75mm and 80mm AAC panels 20 is relatively close. In the partition wall construction where a multi-mass-spring system is the main sound insulation mechanism, a small increase in the surface density of the base wall 10 has a limited contribution to improving the overall sound insulation performance.

[0051] Furthermore, such as Figure 6 Scheme B1, as shown, uses an 80mm thick autoclaved aerated concrete (AAC) panel 20, an asymmetric cavity layer 30 (containing 32mm thick rock wool with a density of 40kg / m³), and each side of the gypsum board 90 uses a combination of a 12.5mm ordinary gypsum board and a 15mm reinforced gypsum board. The ALC panels are sealed together, and its simulated sound insulation performance (Rw+Ctr) is 58dB. Scheme B1 is compared with Scheme A2, which uses the same internal structure but with an AAC panel 20 thickness of 75mm (e.g., ...). Figure 3As shown in the figure, a comparison of the simulated sound insulation performance (Rw+Ctr value of 54dB) reveals that, under the optimal interior conditions of asymmetric large cavity combined with mixed gypsum board 90, while increasing the thickness of autoclaved aerated concrete (AAC) board 20 from 75mm to 80mm improves the sound insulation performance to some extent, the 75mm thickness scheme still meets the sound insulation performance requirement of Rw+Ctr≥50dB. This further verifies that the performance difference between 75mm and 80mm AAC boards 20 in the multi-mass-spring system is limited. It should be noted that the areal density of 75mm and 80mm thick AAC boards 20 is relatively close, and due to its thinner thickness, the internal moisture content of the 75mm thick board may be slightly higher than that of the 80mm thick board under the same drying and curing period. The slightly higher moisture content slightly increases the actual effective mass, thus further reducing the actual difference in areal density between the 75mm and 80mm boards. This is one of the reasons why the difference in sound insulation performance between the two thicknesses is relatively small. In the multi-mass-spring system structure of this embodiment, the slight difference in the surface density of the base wall 10 on the overall sound insulation performance is fully compensated by the sound energy attenuation effect of the two-sided cavity layer 30, rock wool 40 and multi-layer gypsum board 90, and does not affect the overall sound insulation performance from meeting the standard.

[0052] Therefore, under the premise of meeting the sound insulation performance requirements, this embodiment preferably uses a 75mm thick autoclaved aerated concrete board 20, which is more economical than an 80mm thick board. It can reduce the material cost and self-weight of the base wall 10, and at the same time reduce the total thickness of the partition wall, which is conducive to increasing the indoor usable area.

[0053] In this embodiment, the thickness of each cavity layer 30 is preferably 55mm, and both cavity layers 30 are 55mm thick, arranged symmetrically.

[0054] The thickness of the cavity layer (30mm) directly affects the strength of the air spring effect. According to the mass-spring-mass sound insulation principle, the larger the cavity layer (30mm) thickness, the lower the system's resonant frequency, and the better the sound insulation performance in the mid-to-low frequency range. However, increasing the cavity layer (30mm) thickness also leads to an increase in the overall thickness of the partition wall, occupying more interior space.

[0055] This embodiment simulates and compares different cavity layer 30 structures. For example... Figure 4 The A3 scheme shown employs a symmetrical 55mm cavity layer 30 structure (55mm on both sides), combined with a 75mm thick autoclaved aerated concrete board 20 and double-layer gypsum board 90. Its simulated sound insulation performance Rw+Ctr value reaches 52dB, meeting the sound insulation performance requirement of Rw+Ctr≥50dB. For example... Figure 2The A1 scheme shown uses an asymmetric cavity layer 30 structure. Although its simulated sound insulation performance Rw+Ctr value is 55dB, which is slightly higher than that of the A3 scheme, its single-sided cavity layer 30 thickness is large, resulting in a significant increase in the total thickness of the partition wall.

[0056] From the perspective of sound insulation mechanism analysis, the low-frequency resonant frequency of the symmetrical 55mm cavity layer 30 structure is approximately 80Hz, slightly higher than the resonant frequency of the asymmetrical large cavity structure (approximately 73Hz). This has a slight impact on the 125Hz frequency band that determines the sound insulation, but the overall sound insulation performance still meets the target requirements. Therefore, this embodiment preferably uses a 55mm cavity layer 30 thickness, which effectively controls the total thickness of the partition wall while ensuring that the sound insulation performance meets the standards, achieving the best balance between sound insulation performance and space utilization efficiency.

[0057] In this embodiment, the thickness of rock wool 40 is preferably 32 mm, and the density is preferably 40 kg / m³.

[0058] The density and thickness of rock wool 40 directly affect the sound energy absorption effect within the cavity layer 30. Rock wool 40 with a density of 40 kg / m³ has a suitable fiber arrangement density and internal pore structure. Its flow resistance characteristics allow sound waves to be sufficiently attenuated by friction when propagating between fibers, resulting in good absorption of mid-to-high frequency sound waves, while also providing some attenuation for low-frequency sound waves.

[0059] The rock wool 40 layer is preferably 32mm thick, which, combined with the 55mm thick cavity layer 30, occupies approximately 58% of the space within the cavity layer 30, leaving approximately 23mm of space as air gaps. This combination of the rock wool 40 layer and the air gaps allows the cavity layer 30 to have both direct sound energy absorption by the sound-absorbing material and the buffering effect of the air gaps on sound wave propagation. These two elements synergistically enhance the overall sound energy attenuation effect of the cavity layer 30. Figure 4 In the A3 scheme shown, rock wool 40 with a density of 40kg / m³ and a thickness of 32mm was used. A simulated sound insulation performance of 52dB was achieved in the symmetrical 55mm cavity layer 30 structure, which verifies the rationality and effectiveness of the above rock wool 40 parameters.

[0060] This embodiment establishes a set of synergistically optimized structural parameters by preferably using an autoclaved aerated concrete (AAC) panel 20 with a thickness of 75 mm, a cavity layer 30 with a thickness of 55 mm (symmetrically arranged), and rock wool 40 with a thickness of 32 mm and a density of 40 kg / m³. Under these parameters, the components of the partition wall work together in terms of sound insulation mechanism: the 75 mm AAC panel 20 provides a sufficient base layer mass; the symmetrical 55 mm cavity layer 30 provides an appropriate air spring effect; the 40 kg / m³ density, 32 mm thickness of rock wool 40 provides efficient sound energy absorption within the cavity layer 30; and with the mass layer of at least two layers of gypsum board 90 on the outside and the staggered joint structure, the entire system achieves multiple attenuation of sound waves across a wide frequency range.

[0061] Simulation results show that the optimal parameter combination corresponds to the A3 scheme (such as...). Figure 4 The sound insulation performance (Rw+Ctr value) of the A3 scheme reaches 52dB, which has a 2dB margin compared to the target value of 50dB. The corresponding weighted sound insulation value (Rr) is approximately 53.3dB. It should be noted that in the simulation tests of the A3 scheme, the test data in the high-frequency band (such as 2000Hz and above) is affected by lateral sound transmission interference, and the test results in this frequency band are only for reference. Although the high-frequency data has the aforementioned interference factors, since the key frequency band determining the sound insulation performance evaluation of the partition wall is mainly concentrated in the mid-low frequency band (especially the 125Hz~500Hz frequency band), the impact of high-frequency lateral sound transmission on the comprehensive evaluation value of Rw+Ctr is limited. The overall sound insulation performance of the A3 scheme still stably meets the target requirement of Rw+Ctr≥50dB. It ensures that the sound insulation performance meets the standard while possessing a certain safety margin. Meanwhile, the total thickness of the partition wall under this construction scheme (20mm 75mm autoclaved aerated concrete slabs + 30mm 55mm cavity layers on each side + gypsum boards on both sides) is effectively controlled, taking into account sound insulation performance, construction convenience and economy.

[0062] In one embodiment, two layers of gypsum board 90 are fixed on the side of each support frame 50 away from the base wall 10; the thickness of each layer of gypsum board 90 is 12.5 mm.

[0063] In this embodiment, a comparative simulation test was conducted on the sound insulation performance of different 90-layer gypsum board construction schemes. Specifically:

[0064] like Figure 5The A4 scheme shown employs a 75mm thick autoclaved aerated concrete board 20 and an asymmetric cavity layer 30 (containing 32mm thick rock wool with a density of 40kg / m³), with only a single layer of 12.5mm ordinary gypsum board installed on each side. The simulated sound insulation performance Rw+Ctr value of this scheme is only 48dB, failing to meet the sound insulation performance requirement of Rw+Ctr≥50dB. The corresponding weighted sound insulation value Rr is only 45.0dB, significantly lower than the target requirement of Rr≥50dB. The fact that both the Rr and Rw+Ctr values ​​of the A4 scheme fail to meet the standards further demonstrates that in the partition wall construction of this embodiment, when only a single layer of gypsum board 90 is used on each side, its sound insulation performance is significantly insufficient regardless of the sound insulation evaluation system used.

[0065] like Figure 2 Scheme A1, as shown, uses the same autoclaved aerated concrete (AAC) board thickness of 20mm, cavity layer structure of 30mm, and rock wool parameters of 40mm as Scheme A4. However, the gypsum board thickness of 90mm on each side is changed from a single layer of 12.5mm to a double layer of 12.5mm (i.e., two layers on each side, for a total thickness of 25mm). The simulated sound insulation performance Rw+Ctr value of this scheme is 55dB, which is 7dB higher than that of Scheme A4, significantly exceeding the sound insulation performance requirement of Rw+Ctr≥50dB.

[0066] like Figure 4 Scheme A3 shown uses a 75mm thick autoclaved aerated concrete board 20, symmetrical 55mm cavity layers 30 (containing 32mm thick rock wool with a density of 40kg / m³), and two layers of 12.5mm ordinary gypsum board on each side. The simulated sound insulation performance Rw+Ctr value of this scheme is 52dB, which also meets the sound insulation performance requirement of Rw+Ctr≥50dB.

[0067] The comparison between Scheme A4 and Scheme A1 clearly demonstrates that, in the overall construction of the partition wall, increasing the gypsum board 90 on each side from a single layer to a double layer plays a crucial role in improving sound insulation performance. This is because the surface density of double-layer gypsum board 90 is twice that of a single layer. According to the mass law, the increase in surface density directly enhances the sound wave isolation capability of the mass layer. Simultaneously, the double-layer gypsum board 90 structure has a contact surface between the inner and outer layers. When sound waves pass through the two layers, energy transfer and attenuation occur at this contact surface, further enhancing the sound insulation effect. Especially in the low-frequency range, where sound waves have longer wavelengths and stronger penetrating power, single-layer gypsum board 90 has limited isolation effect on low-frequency sound waves due to insufficient surface density. Double-layer gypsum board 90 effectively compensates for this deficiency by increasing surface density, significantly improving low-frequency sound insulation performance.

[0068] Therefore, in this embodiment, the number of gypsum board 90 layers on each side is determined to be two layers. This ensures that the sound insulation performance meets the target requirements, while avoiding the increase in construction complexity, material costs, and wall thickness caused by using too many layers of gypsum board 90. This achieves a reasonable balance between sound insulation performance and construction economy.

[0069] In this embodiment, the thickness of each layer of gypsum board 90 is determined to be 12.5mm. That is, the total thickness of the two layers of gypsum board 90 on each side is 25mm (12.5mm + 12.5mm).

[0070] 12.5mm thick gypsum board (90mm) is the most commonly used standard specification of ordinary gypsum board in construction engineering. It is widely available, easy to procure, and has a low cost per unit area. This embodiment compares and verifies different types and thicknesses of gypsum board (90mm) in a simulation experiment. Among them:

[0071] like Figure 3 Scheme A2, as shown, employs a 75mm thick autoclaved aerated concrete panel 20, an asymmetric cavity layer 30 (containing 32mm thick rock wool with a density of 40kg / m³), and a gypsum board 90 on each side consisting of a combination of a 12.5mm ordinary gypsum board and a 15mm reinforced gypsum board (i.e., an upper layer of 12.5mm ordinary gypsum board + a lower layer of 15mm reinforced gypsum board). The simulated sound insulation performance Rw+Ctr of this scheme is 54dB, meeting the sound insulation performance requirement of Rw+Ctr≥50dB.

[0072] like Figure 2 The A1 scheme shown uses double-layer 12.5mm ordinary gypsum board (12.5mm + 12.5mm) on each side, with the same autoclaved aerated concrete panel 20 and cavity layer 30 construction. The simulated sound insulation performance Rw+Ctr value of this scheme is 55dB, which also meets the sound insulation performance requirements and is basically close to that of the A2 scheme.

[0073] like Figure 4 The A3 scheme shown, with a symmetrical 55mm cavity layer 30 structure, uses double layers of 12.5mm ordinary gypsum board (12.5mm + 12.5mm) on each side. The simulated sound insulation performance Rw+Ctr value of this scheme is 52dB, which meets the sound insulation performance requirements.

[0074] The comparison between schemes A1 and A2 above shows that the sound insulation performance is comparable between the two-layer 12.5mm ordinary gypsum board and the combination of 12.5mm ordinary gypsum board and 15mm reinforced gypsum board, with a difference of only 1dB. However, the unit price of reinforced gypsum board is generally higher than that of ordinary gypsum board of the same thickness, and the specifications and supply channels of reinforced gypsum board are relatively limited. Therefore, under the premise of basically the same sound insulation performance, this embodiment prefers the two-layer 12.5mm ordinary gypsum board construction scheme to achieve better cost-effectiveness.

[0075] In this embodiment, the two layers of 12.5mm gypsum board 90 on each side are installed in a staggered manner. Specifically, the first layer (inner layer) of gypsum board 90 on the side closer to the support frame 50 is first fixedly installed on the support frame 50, and the splicing seam between each first layer of gypsum board 90 is naturally formed according to the board size. Then, the second layer (outer layer) of gypsum board 90 is superimposed and installed on the outside of the first layer of gypsum board 90. When installing the second layer of gypsum board 90, the splicing seam position of each second layer of gypsum board 90 is staggered from the splicing seam position of the first layer of gypsum board 90 to avoid the joints of the two layers of gypsum board 90 overlapping at the same position.

[0076] By using staggered joint installation, two layers of 12.5mm gypsum board 90 form a composite quality layer with good integrity. When sound waves pass through this composite quality layer, they cannot find a continuous gap channel that penetrates the thickness of the two layers of boards, effectively blocking the sound bridging effect and ensuring the sound insulation integrity and reliability of the double-layer gypsum board 90 structure.

[0077] The complete structural parameters of the residential partition wall based on ALC panels in this embodiment are as follows:

[0078] The autoclaved aerated concrete (AAC) panel 20 is 75mm thick. The base wall 10 is constructed by directly splicing multiple 75mm thick AAC panels 20 together, without any sealant at the joints. Support frames 50 are installed on both sides of the base wall 10, forming a 55mm thick cavity layer 30 between each support frame 50 and the base wall 10. The cavity layers 30 are symmetrically arranged on both sides. The cavity layers 30 on both sides are filled with rock wool 40 with a density of 40kg / m³ and a thickness of 32mm. Two layers of 12.5mm thick gypsum board 90 are fixed to the side of each support frame 50 furthest from the base wall 10, with the two layers of gypsum board 90 on the same side installed in a staggered manner.

[0079] The total thickness of the partition wall corresponding to this construction scheme along the thickness direction is: 12.5mm (outer gypsum board) + 12.5mm (inner gypsum board) + 55mm (cavity layer) + 75mm (autoclaved aerated concrete board) + 55mm (cavity layer) + 12.5mm (inner gypsum board) + 12.5mm (outer gypsum board) = 235mm.

[0080] like Figure 4The simulation test results of scheme A3 shown indicate that, under the coordinated configuration of all the above parameters, the sound insulation performance Rw+Ctr value of this partition wall reaches 52dB, meeting the sound insulation performance target requirement of Rw+Ctr≥50dB, and providing a safety margin of 2dB compared to the target value. Furthermore, this construction scheme uses all conventional building materials (75mm autoclaved aerated concrete panels 20, standard 12.5mm ordinary gypsum board, and conventional density rock wool), ensuring wide availability and controllable costs. No sealing adhesive is required between the autoclaved aerated concrete panels 20, simplifying the construction process. All parameters have been systematically optimized and verified through simulation, balancing sound insulation performance, fire resistance, ease of construction, and economy, achieving optimal overall performance across all indicators.

[0081]

[0082] Note:

[0083]

[0084] In one embodiment, multiple support frames 50 are respectively provided on both sides of the base wall 10. The support frames 50 on the same side are distributed at intervals along the length direction of the base wall 10, and each support frame 50 is a light steel keel frame.

[0085] In this embodiment, a plurality of support frames 50 are provided on each side of the base wall 10. The plurality of support frames 50 on the same side are arranged at intervals along the length direction of the base wall 10 (i.e., the extension direction of the partition wall). A certain distance is maintained between each support frame 50, so that the plurality of support frames 50 are arranged in an array with equal or approximately equal intervals on the same side surface of the base wall 10.

[0086] Multiple support frames 50 are distributed along the length of the base wall 10, providing continuous and uniform support points for the gypsum board 90 along the entire length of the partition wall. This ensures that the gypsum board 90 is flat and evenly stressed after installation, preventing localized suspension, deformation, or vibration of the gypsum board 90 due to insufficient support points, thus guaranteeing the sound insulation integrity of the gypsum board 90 layer. Each support frame 50 is a light steel keel frame. The light steel keel frame is a skeleton structure assembled from thin-walled cold-formed steel components and is a standard support structure widely used in interior partition wall and ceiling projects.

[0087] In one embodiment, the light steel keel frame is a C-shaped light steel keel, the C-shaped light steel keel includes a web 60 and a first flange 70 and a second flange 80 located on both sides of the web 60; the base wall 10 and the rock wool 40 are respectively fixed to opposite sides of the first flange 70, and there is an equidistant gap between the rock wool 40 and the base wall 10; the at least two layers of gypsum board 90 are fixed to the side of the second flange 80 away from the base wall 10.

[0088] In this embodiment, the light steel keel frame is a C-shaped light steel keel. A C-shaped light steel keel is a thin-walled cold-formed steel member with a C-shaped cross-section. Its cross-section includes a web 60 and a first flange 70 and a second flange 80 located on both sides of the web 60. The web 60 is the vertical plate-like portion connecting the two flanges in the C-shaped cross-section. The first flange 70 and the second flange 80 are located at the ends of the web 60, respectively, and each bends and extends in the same direction to form a C-shaped open cross-section. In this embodiment, the width W of the web 60 of the C-shaped light steel keel is 55mm, the flange width F is 50mm (both the first and second flanges are 50mm), and the plate thickness t is 1.2mm. Multiple C-shaped light steel keels on the same side are arranged and installed at 600mm intervals along the length of the base wall 10. The C-shaped light steel keel is installed vertically, and the web plate 60 is set vertically. The width direction of the web plate 60 extends horizontally along the thickness direction of the partition wall. The first flange 70 is located at the end of the web plate 60 that is close to the base wall 10, and the second flange 80 is located at the end of the web plate 60 that is far away from the base wall 10.

[0089] The base wall 10 and rock wool 40 are fixed to opposite sides of the first flange 70. Specifically, the side of the first flange 70 facing the base wall 10 is fixed to the surface of the base wall 10, while the rock wool 40 is fixed to the other side of the first flange 70 away from the base wall 10. Thus, the first flange 70 is sandwiched between the base wall 10 and the rock wool 40, with equidistant gaps between them. The distance of these gaps is equal to the thickness of the first flange 70, i.e., 1.2 mm. Since the thickness of each C-shaped light steel keel on the same side is the same, the gaps between the rock wool 40 and the base wall 10 at each keel position are equal, forming equidistant gaps. These equidistant gaps prevent direct contact between the rock wool 40 and the base wall 10, avoiding the formation of a sound bridge through the rigid contact between the rock wool 40 and the base wall 10. The existence of these gaps adds a thin air isolation layer to the sound wave transmission path, helping to reduce solid-borne sound transmission.

[0090] Rock wool 40 is fixed to the side of the first flange 70 away from the base wall 10, so that rock wool 40 is located in the area of ​​the cavity layer 30 close to the base wall 10. Since the thickness of rock wool 40 is less than the thickness of the cavity layer 30, an air gap is still maintained between the side of rock wool 40 away from the base wall 10 and the gypsum board 90. Taking the specific dimensions of this embodiment as an example, when the width of the web 60 is 55mm, the thickness of rock wool 40 is 32mm, and the thickness of the first flange 70 is 1.2mm, the air gap between the side of rock wool 40 away from the base wall 10 and the gypsum board 90 is approximately 21.8mm. The rock wool 40 layers and the air gap together form a composite acoustic structure within the cavity layer 30. After the sound waves are transmitted from the base wall 10, they first pass through the equidistant gap formed by the thickness of the first flange 70, enter the rock wool 40 layers and are absorbed and attenuated by fiber friction. Then, they are further buffered by the air gap on the outside of the rock wool 40, and finally reach the gypsum board 90 mass layer, thereby achieving effective attenuation of broadband sound waves.

[0091] At least two layers of gypsum board 90 are fixed to the side of the second flange 80 away from the base wall 10. The inner layer of gypsum board 90 is first fixed to the outer surface of the second flange 80 facing the interior space, and the outer layer of gypsum board 90 is then overlapped and fixed to the outer surface of the inner layer of gypsum board 90.

[0092] In summary, in this embodiment, the stacking sequence of components along the thickness direction of the partition wall from the base wall 10 to the interior space side is as follows: base wall 10 → first flange 70 (1.2mm thick, forming equidistant gaps) → rock wool 40 → air gap → second flange 80 → at least two layers of gypsum board 90 (staggered installation). On the other side of the base wall 10, C-shaped light steel keel, rock wool 40, and multi-layer gypsum board 90 are installed in a corresponding manner, forming a complete double-sided interior structure of the partition wall. The C-shaped light steel keel, through its standardized cross-sectional structure, achieves a reasonable layout and precise positioning of the base wall 10, rock wool 40, and gypsum board 90 within the cavity layer 30, enabling the various sound insulation structural elements of the partition wall to cooperate spatially and jointly achieve excellent sound insulation performance.

[0093] In one embodiment, a rubber pad 100 is fixedly disposed between the at least two layers of gypsum board 90 and the second flange 80.

[0094] In this embodiment, the rubber pad 100 is disposed between the outer surface of the second flange 80 facing the indoor space and the inner gypsum board 90. The rubber pad 100 is respectively attached and fixed to the outer surface of the second flange 80 and the inner surface of the inner gypsum board 90, so that the inner gypsum board 90 does not directly contact the metal surface of the second flange 80, but is indirectly connected to the second flange 80 through the rubber pad 100.

[0095] In the partition wall, the web 60 of the C-shaped light steel keel connects the first flange 70 on the side of the base wall 10 and the second flange 80 on the side of the gypsum board 90, structurally forming a solid sound transmission path between the base wall 10 and the gypsum board 90. When sound waves act on the base wall 10, some of the sound energy is transmitted in the form of vibration through the base wall 10 to the first flange 70, then along the web 60 to the second flange 80, and finally to the gypsum board 90, causing the gypsum board 90 to vibrate and radiate sound waves into the indoor space, forming a sound bridge effect. The sound bridge effect reduces the sound insulation effect of the air spring in the cavity layer 30, making the actual sound insulation performance of the partition wall lower than the theoretical calculation value.

[0096] A rubber pad 100 is placed between the second flange 80 and the gypsum board 90 to effectively suppress the aforementioned sound bridge effect. Rubber material has excellent elasticity and damping properties. When vibration is transmitted from the second flange 80 to the rubber pad 100, the rubber pad 100 undergoes elastic deformation, converting the vibration energy into heat energy and dissipating it, thereby attenuating the solid vibration energy transmitted to the gypsum board 90 through the light steel keel. The rubber pad 100 is equivalent to adding a flexible vibration-damping isolation layer between the light steel keel and the gypsum board 90, cutting off the rigid direct contact between the metal surface of the second flange 80 and the gypsum board 90, thus significantly reducing the sound energy transmitted through the solid path.

[0097] Both ends of the C-type light steel keel are equipped with sound bridge blocking measures: on one side of the first flange 70, equidistant gaps prevent direct rigid contact between the rock wool 40 and the base wall 10; on one side of the second flange 80, rubber pads 100 prevent direct rigid contact between the gypsum board 90 and the keel. These two sound bridge blocking measures work together to simultaneously reduce the vibration energy transmitted through the light steel keel from both ends of the solid-borne sound transmission path, further improving the overall sound insulation performance of the partition wall.

[0098] In one embodiment, the autoclaved aerated concrete slab 20 is a precast slab that has undergone drying treatment, and the internal moisture content of the precast slab is not higher than 20%.

[0099] In this embodiment, the autoclaved aerated concrete (AAC) panels 20 undergo a high-temperature, high-pressure steam curing process during factory production, and typically contain a high moisture content when they leave the factory. This embodiment reduces the internal moisture content of the AAC panels 20 to no more than 20% by drying them before installation. AAC panels 20 with a moisture content of no more than 20% experience less subsequent drying shrinkage after installation, resulting in better dimensional stability, reduced shrinkage cracks at joints, and ensured integrity of the base wall 10.

[0100] like Figure 8As shown, corresponding to the above-mentioned residential partition wall based on ALC board, this embodiment of the invention also provides a sound insulation construction method for a residential partition wall based on ALC board, which includes the following steps S1-S4.

[0101] S1. A 70-80mm thick autoclaved aerated concrete (AAC) panel 20 is vertically installed at the partition wall position. Adjacent AAC panels 20 are directly joined together with a joint, and the joint is not sealed or filled, forming the base wall 10.

[0102] In this embodiment, autoclaved aerated concrete (AAC) panels 20 with a thickness of 70-80 mm are vertically installed at the partition wall location. Specifically, according to the design location of the partition wall, positioning lines for the partition wall are marked on the floor slab, and multiple AAC panels 20 are vertically placed sequentially along the positioning lines. Adjacent AAC panels 20 are directly joined together. That is, the side surfaces of two adjacent AAC panels 20 are directly abutted and joined, naturally forming a joint between the panels. No sealing or filling treatment is applied to the joint; that is, no sealant, sealing strip, or any other form of sealing material is used. After multiple AAC panels 20 are sequentially joined together, they collectively form the base wall 10.

[0103] It should be noted that in traditional construction processes, the joints between adjacent autoclaved aerated concrete (AAC) panels 20 typically require strict sealing with sealant to prevent sound wave leakage. This process is cumbersome, inefficient, and prone to incomplete sealing or sealant aging and failure in actual projects, leading to a decline in the wall's sound insulation performance. The sound insulation construction method of this embodiment, through subsequent steps S2 to S4, constructs a combination and parameter configuration of a cavity layer 30, rock wool 40, and multi-layer gypsum board 90 on both sides of the base wall 10. This eliminates the need for sealing at the joints, ensuring the entire partition wall achieves a sound insulation performance requirement of Rw+Ctr≥50dB. By omitting the joint sealing process, step S1 only involves the positioning, installation, and joint connection of the AAC panels 20, significantly simplifying the construction process, improving efficiency, and eliminating potential sound insulation performance issues caused by poor sealing quality.

[0104] S2. A support frame 50 is erected on both sides of the base wall 10, and a cavity layer 30 with a thickness of 50-70mm is formed between the support frame 50 on each side and the base wall 10.

[0105] In this embodiment, support frames 50 are respectively erected on both sides of the base wall 10 formed in step S1. A cavity layer 30 with a thickness of 50-70mm is formed between each support frame 50 and the base wall 10.

[0106] Specifically, a support frame 50 is first erected on one side of the base wall 10. Multiple support frames 50 can be installed on the same side, with each support frame 50 spaced apart along the length of the base wall 10 to provide continuous and uniform support for the subsequently installed gypsum board 90. Subsequently, support frames 50 are erected on the other side of the base wall 10 in the same manner, so that a cavity layer 30 with a thickness of 50-70mm is also formed on the other side of the base wall 10.

[0107] The cavity layer 30 acts as an air spring in the partition wall. After sound waves enter the cavity layer 30, the air inside the cavity layer 30 acts as an elastic medium to attenuate the sound energy. The thickness of the cavity layer 30 is set to 50-70mm. This thickness range takes into account both the air spring effect and the control of the overall thickness of the partition wall, ensuring good sound insulation performance while avoiding excessive total wall thickness.

[0108] S3. Fill the cavity layers 30 on both sides with rock wool 40 with a thickness of 25-40 mm and a density of 35-45 kg / m³.

[0109] In this embodiment, the two cavity layers 30 formed in step S2 are respectively filled with rock wool 40. The thickness of the rock wool 40 is 25-40 mm, and the density is 35-45 kg / m³.

[0110] Specifically, rock wool boards or rock wool felts pre-cut to a set size are installed in the cavity layer 30 on each side. The thickness of the rock wool 40 is less than the thickness of the cavity layer 30, so the rock wool 40 will not fill the entire cavity layer 30 after filling. There are still some air gaps between the rock wool 40 and the gypsum board 90 and between the rock wool 40 and the base wall 10.

[0111] After rock wool 40 is placed inside the cavity layer 30, when sound waves enter the cavity layer 30, the sound waves cause air molecules to vibrate in the tiny pores between the fibers of the rock wool 40. The air molecules are subjected to frictional resistance from the fibers, and the sound energy is converted into heat energy and dissipated, thus effectively reducing the sound energy density within the cavity layer 30. The density of rock wool 40 is 35–45 kg / m³, a density range that gives it suitable porosity and flow resistance characteristics, enabling effective absorption of broadband sound waves. The thickness of rock wool 40 is 25–40 mm, which, together with the air gaps retained within the cavity layer 30, synergistically enhances the overall sound energy attenuation effect of the cavity layer 30.

[0112] After both sides of the cavity layer 30 are filled with rock wool 40, a composite cavity structure containing a rock wool 40 sound-absorbing layer and an air gap is formed on both sides of the base wall 10, laying the foundation for the subsequent installation of gypsum board 90 to form a complete multi-mass-spring-mass sound insulation structure.

[0113] S4. Fix at least two layers of gypsum board 90 to the outside of the support frame 50 on each side, and ensure that the gypsum board 90 of different layers on the same side are installed with staggered joints.

[0114] In this embodiment, after the rock wool 40 is filled in step S3, at least two layers of gypsum board 90 are fixedly installed on the outside of each support frame 50 away from the base wall 10.

[0115] Specifically, the first layer (inner layer) of gypsum board 90 is first installed on the outer side of each support frame 50. The gypsum board 90 is then fixed to the support frame 50 piece by piece, naturally forming joints between adjacent gypsum board 90s. After the first layer of gypsum board 90 is installed, the second layer (outer layer) of gypsum board 90 is installed on its outer surface. When installing the second layer of gypsum board 90, it is necessary to ensure that the joints between the second layer of gypsum board 90 are staggered from those between the first layer of gypsum board 90, i.e., the different layers of gypsum board 90 are installed in a staggered manner. If three or more layers of gypsum board 90 need to be installed, each layer should maintain a staggered joint relationship.

[0116] If the joints of different layers of gypsum board 90 coincide and align, sound waves may propagate directly along the continuous gaps that run through the thickness of the multi-layer board, forming a sound bridge and causing a decrease in sound insulation performance. However, by installing the joints in a staggered manner, the sound waves are blocked by the continuous surface of the next layer of gypsum board 90 after passing through the joint of one layer, effectively preventing the sound bridge effect.

[0117] After at least two layers of gypsum board 90 are installed on each side, the partition wall forms a complete multi-mass-spring-mass sound insulation structure of "multi-layer gypsum board 90 - 40 layers of air / rock wool - ALC board - 40 layers of air / rock wool - multi-layer gypsum board 90". The base wall 10 and the multi-layer gypsum board 90 on both sides constitute three mass layers, and the cavity layers 30 on both sides (including rock wool) constitute two spring layers. When sound waves pass through the partition wall, they need to be attenuated by the alternating attenuation of the multi-mass layers and spring layers, so as to achieve efficient isolation of broadband sound waves.

[0118] By completing steps S1 to S4 above, the sound insulation structure of the residential partition wall based on ALC panels can be achieved. This method has a clear construction process, well-defined steps, uses only conventional building materials, and employs mature construction techniques. In particular, step S1 eliminates the need for sealing and filling the joints, saving the tedious sealing and caulking process of traditional methods, significantly improving construction efficiency, and avoiding the deterioration of sound insulation performance caused by poor sealant application quality or subsequent aging and failure.

[0119] In one embodiment, the pretreatment step before step S1 is to dry the autoclaved aerated concrete slab 20 to a moisture content of no more than 20%.

[0120] Before performing step S1, a pretreatment step of drying the autoclaved aerated concrete (AAC) slab 20 is included. Specifically, the AAC slab 20 is left to dry in a ventilated environment until the moisture content is no higher than 20%.

[0121] The autoclaved aerated concrete (AAC) panels 20 undergo a high-temperature, high-pressure curing process during factory production, resulting in a high internal moisture content upon leaving the factory. If these AAC panels 20 with high moisture content are directly used for installation in step S1, they will continuously release moisture into the surrounding environment after installation. This moisture loss leads to shrinkage, and due to uneven moisture content and drying rates in different areas, shrinkage cracks can easily form on the panel surface or at joints, compromising the integrity of the base wall 10. Furthermore, the moisture released after installation may also cause the rock wool 40 within the cavity layer 30 to become damp, affecting its sound absorption performance.

[0122] Therefore, before step S1, the autoclaved aerated concrete (AAC) panel 20 is placed in a well-ventilated environment for natural static drying. The drying process continues until the internal moisture content of the AAC panel 20 drops to no more than 20%. After the drying pretreatment is completed, steps S1 to S4 are executed sequentially to complete the installation of the base wall 10, the erection of the support frame 50, the filling of rock wool 40, and the installation of gypsum board 90.

[0123] Post-processing steps after step S4: joint filling and finishing layer 91 application.

[0124] After the installation of the gypsum board 90 is completed in step S4, the following post-processing steps are also included.

[0125] First, the joints between the gypsum boards 90 on the same layer are caulking. In step S4, each layer of gypsum board 90 is assembled from multiple gypsum boards 90 on the support frame 50, naturally forming joints between adjacent gypsum boards 90. The purpose of caulking is to fill and reinforce the joints between the gypsum boards 90 within the same layer, thereby improving the integrity and smoothness of the gypsum board 90 finish layer.

[0126] Specifically, the joint filling treatment includes: filling the joint between adjacent panels of the same layer of gypsum board 90 with a joint filling material (such as joint filling plaster or special joint filling compound) to fully fill the joint; then attaching a joint tape (such as fiberglass mesh tape or paper joint tape) to the joint surface, and then applying one or more layers of joint filling material to the joint tape surface. After the joint filling material dries and cures, it is sanded to make the joint surface flush and smooth with the surface of the gypsum board 90.

[0127] The joint sealing process needs to be performed separately for each layer of gypsum board 90 on each side. For the multi-layer gypsum board 90 installed on each side, the joints between the inner layers of gypsum board 90 are sealed before the outer layers of gypsum board 90 are installed. After the outer layers of gypsum board 90 are installed, the joints between the outer layers of gypsum board 90 are sealed. Since the different layers of gypsum board 90 have been staggered according to the requirements of step S4, the joints between the layers of gypsum board 90 do not overlap. After the joint sealing process, the joints of each layer are effectively sealed and reinforced, further improving the sound insulation integrity of the multi-layer gypsum board 90 structure and preventing sound waves from leaking through the joints between the layers.

[0128] Then, a finishing layer 91 is applied to the outer surface of the outermost layer of gypsum board 90. Finishing layer 91 is the final decorative surface layer of the partition wall facing the interior space, used to achieve the aesthetic effect of the partition wall. The type of finishing layer 91 can be selected according to the interior decoration design requirements; common finishing layers 91 include, but are not limited to, paint finishing layers and wallpaper finishing layers.

[0129] After the finishing layer 91 is completed, the sound insulation construction method of the entire residential partition wall based on ALC board is completed. The final partition wall has the following complete structural layers from one side to the other along the thickness direction: finishing layer 91 → at least two layers of gypsum board 90 (staggered installation and caulking treatment) → support frame 50 → cavity layer 30 (containing rock wool) → base wall 10 (composed of multiple autoclaved aerated concrete boards 20 directly spliced ​​together, without sealant at the joints) → cavity layer 30 (containing rock wool) → support frame 50 → at least two layers of gypsum board 90 (staggered installation and caulking treatment) → finishing layer 91.

[0130] In summary, the sound insulation construction method of this embodiment improves the entire construction process of the partition wall from material pretreatment to final decoration by adding a drying pretreatment step of the autoclaved aerated concrete board 20 before step S1 and adding caulking and finishing layer 91 construction steps after step S4. The drying pretreatment ensures that the autoclaved aerated concrete board 20 is in a low moisture content state during installation, reducing the risk of shrinkage cracking after installation and ensuring the dimensional stability and acoustic performance of the base wall 10. The caulking treatment improves the integrity and sound insulation of the gypsum board 90 finishing layer. The finishing layer 91 construction gives the partition wall the final decorative appearance. The above pretreatment and posttreatment steps, together with steps S1 to S4, constitute a complete sound insulation construction method, enabling the partition wall to meet the expected requirements in terms of sound insulation performance, structural reliability, and decorative effect.

[0131] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A residential partition wall based on an ALC panel, characterized in that, The system includes a base wall, which is constructed from multiple autoclaved aerated concrete (AAC) panels, each 70-80 mm thick, joined together. Adjacent AAC panels are directly butted together, and no sealant is used at the joints. Support frames are installed on opposite sides of the base wall, forming a 50-70 mm thick cavity between each support frame and the base wall. Rock wool, 25-40 mm thick and 35-45 kg / m³, is placed within the cavity. At least two layers of gypsum board are fixed to the side of each support frame furthest from the base wall, with different layers of gypsum board on the same side installed in a staggered manner.

2. The residential partition wall based on ALC board according to claim 1, characterized in that, The cavity layers on both sides of the base wall have the same thickness, and the cavity layers on both sides are symmetrically arranged relative to the base wall.

3. The residential partition wall based on ALC board according to claim 2, characterized in that, The thickness of the autoclaved aerated concrete slab is 75mm; the thickness of the cavity layer formed between the support frame and the base wall on each side is 55mm; the thickness of the rock wool is 32mm and the density is 40kg / m³.

4. The residential partition wall based on ALC board according to claim 3, characterized in that, Two layers of gypsum board are fixed on the side of each support frame away from the base wall; the thickness of each layer of gypsum board is 12.5mm.

5. The residential partition wall based on ALC board according to claim 1, characterized in that, Multiple support frames are provided on both sides of the base wall. The support frames on the same side are distributed at intervals along the length of the base wall, and each support frame is a light steel keel frame.

6. The residential partition wall based on ALC board according to claim 5, characterized in that, The light steel keel frame is a C-shaped light steel keel, which includes a web and a first flange and a second flange located on both sides of the web; the base wall and the rock wool are respectively fixed on opposite sides of the first flange, with an equidistant gap between the rock wool and the base wall; at least two layers of gypsum board are fixed on the side of the second flange away from the base wall.

7. The residential partition wall based on ALC board according to claim 6, characterized in that, A rubber pad is fixedly disposed between the at least two layers of gypsum board and the second flange.

8. The residential partition wall based on ALC board according to claim 1, characterized in that, The autoclaved aerated concrete slab is a precast slab that has undergone drying treatment, and the internal moisture content of the precast slab is not higher than 20%.

9. A method for constructing a sound insulation structure for a residential partition wall based on an ALC board as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. A 70-80mm thick autoclaved aerated concrete (AAC) panel is vertically installed at the partition wall position. Adjacent AAC panels are directly joined together with no sealing or filling treatment at the joints to form the base wall. S2. Construct support frames on opposite sides of the base wall, forming a cavity layer with a thickness of 50-70mm between the support frame on each side and the base wall; S3. Fill the cavity layers on both sides with rock wool with a thickness of 25-40 mm and a density of 35-45 kg / m³. S4. Fix at least two layers of plasterboard to the outside of the support frame on each side, and ensure that the plasterboards of different layers on the same side are installed with staggered joints.

10. The sound insulation construction method according to claim 9, characterized in that, Before step S1, the method further includes: drying the autoclaved aerated concrete board in a ventilated environment until the moisture content is not higher than 20%; after step S4, the method further includes: caulking the joints between the gypsum boards located in the same layer, and applying a finishing layer to the outer surface of the outermost gypsum board.

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