Indoor decoration mortar with sound absorption and damping sound insulation functions and construction method thereof

Abstract

The invention discloses indoor decoration mortar with sound absorption and damping sound insulation functions, which comprises base layer mortar and surface layer mortar, the base layer mortar comprises the following components by weight: 35-55 parts of sand grains (50-130 meshes), 3-5 parts of white rubber particle powder (50-100 [mu] m), 15-25 parts of water (H2O), and 5-10 parts of epoxy resin; 3-10 parts of an acrylic emulsion, 2-4 parts of a water-based paint flexibilizer, 1-2 parts of a wetting dispersant and 1-3 parts of a silane coupling agent; the surface layer mortar is prepared from the following components in parts by weight: 50 to 70 parts of sand grains, 5 to 15 parts of magnesium silicate (MgSiO3), 5 to 15 parts of epoxy resin and 15 to 25 parts of water (H2O); the problems that in the prior art, decoration attractiveness and sound absorption performance cannot be achieved, and resonance of a decoration surface layer plate cannot be effectively regulated and controlled are solved.

Description

Technical Field

[0001] This invention belongs to the field of building construction and relates to an interior decorative mortar with both sound absorption and damping sound insulation functions and its construction method. Background Technology

[0002] Sound-absorbing mortar and damping sound-insulating mortar belong to two different types of materials. Although sound-absorbing composite materials with damping and vibration reduction functions exist in the prior art, a mortar material that simultaneously possesses sound absorption and damping sound insulation functions has not yet been seen in engineering applications. In this invention, "sound absorption" refers to sound absorption performance under the conventional definition; "damping sound insulation" refers to the effect of the mortar coating on the surface of the board, which improves the sound insulation performance of the board through damping, specifically manifested as the total loss factor of the board. The measurement of this total loss factor is based on the definition in Appendix E of "Acoustic Measurement of Sound Insulation of Buildings and Building Components Part 3: Laboratory Measurement of Airborne Sound Insulation of Building Components" (GB / T 19889.3), reflecting the energy attenuation of the board after excited vibration and closely related to the decay characteristics of its internal reverberation time.

[0003] In venues with high acoustic requirements, such as theaters, cinemas, and concert halls, sound reinforcement systems often excite surface decorative panels to resonate, leading to acoustic defects and disharmony in the indoor sound quality. The total loss factor of the panel's vibration energy directly affects the clarity, reverberation, and immersion of the sound field, thus impacting the listener's auditory experience. For example, a damping sound-insulating spray mortar disclosed in application number 201510464615.4, due to its cement and fly ash composition, cannot form an interconnected microporous structure within the mortar, thus lacking sound absorption properties. Similarly, a sound-absorbing mortar and material disclosed in application number 201610543269.3, lacks viscoelasticity and internal friction in its aggregates, making it insufficient to convert the structural mechanical energy caused by acoustic vibration into heat energy, thus lacking damping sound insulation properties. For a long time, designers have sought a material that combines aesthetic appeal with sound absorption properties and can effectively regulate the resonance of decorative surface panels to improve indoor sound quality. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a mortar for interior decoration that combines sound absorption and damping sound insulation functions, along with its construction method. This mortar can be applied to both walls and ceilings, is not limited by the shape of decorative panels, and provides designers with a novel acoustic material.

[0005] The technical solution of this invention is implemented as follows:

[0006] An interior decorative mortar that combines sound absorption and damping sound insulation functions includes a base layer mortar and a surface layer mortar.

[0007] By weight, the base mortar comprises the following components: 35-55 parts sand (50-130 mesh), 3-5 parts white rubber granules (50-100μm), 15-25 parts water (H2O), 5-10 parts epoxy resin, 3-10 parts acrylic emulsion, 2-4 parts water-based coating toughening agent, 1-2 parts wetting and dispersing agent, and 1-3 parts silane coupling agent;

[0008] The surface mortar comprises the following components by weight: 50-70 parts sand, 5-15 parts magnesium silicate (MgSiO3), 5-15 parts epoxy resin, and 15-25 parts water (H2O).

[0009] Preferably, the base mortar and the surface mortar also include a trace amount of colorant.

[0010] Preferably, the mesh size of the sand particles in the base mortar is 50-130.

[0011] Preferably, the surface mortar has a sand particle size of 30-100.

[0012] Preferably, the white rubber granules have a diameter of 50–100 μm.

[0013] A construction method for an interior decorative mortar that combines sound absorption and damping sound insulation functions includes the following steps:

[0014] S1: Clean the decorative panels to ensure the surface is free of dust, impurities, and oil.

[0015] S2: Apply the base mortar to the surface of the decorative board by scraping or spraying, with a coating thickness of 5-10mm;

[0016] S3: The base mortar is applied in two layers: the first layer is used to fill the pores and gaps on the surface of the decorative panels; the second layer is used to achieve the required thickness for acoustic performance and to level the large area. Each layer must be allowed to dry naturally after completion.

[0017] S4: After the base mortar is completed and dried, a topcoat mortar is applied to its surface. The thickness of the topcoat mortar is 5-10 mm.

[0018] The mortar provided by this invention is a finished liquid container that can be used on the construction site with only simple mixing. This eliminates the need for on-site batching, metering, and secondary mixing of traditional dry powder mortar, thus greatly improving construction efficiency and productivity. In terms of precision, a layered construction method is adopted: the base mortar is used to fill pores and provide damping and sound insulation functions, while the surface mortar is used for acoustic absorption and decorative leveling. The layer thickness can be controlled within the range of 5-15mm, with uniform and highly controllable construction thickness, which can meet the requirements of refined construction and acoustic performance design. In terms of efficiency, the base mortar and surface mortar perform different functions respectively. Damping, sound insulation, sound absorption, and decoration are completed in one construction process, avoiding the complexity of traditional multi-material step-by-step construction, greatly shortening the construction period, and improving the overall construction efficiency. In terms of energy consumption, construction does not require high-temperature curing or additional energy-consuming processes. The mortar can be cured and formed by natural drying, reducing energy consumption on the construction site. In terms of process simplification, the same mechanical equipment (mortar spraying machine or stone paint spraying machine) is used for base and surface construction, without the need to change process equipment. The on-site construction process only includes cleaning → base coating → natural drying → surface coating → natural drying, significantly reducing the number of process steps and facilitating large-scale promotion.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure in use of the present invention;

[0022] Figure 2 The accompanying drawings show the usage state of this invention.

[0023] Figure label:

[0024] 1. Surface mortar; 2. Base mortar; 3. Board material. Detailed Implementation

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0026] The present invention provides an interior decorative mortar with both sound absorption and damping sound insulation functions, comprising a base mortar 2 and a surface mortar 1.

[0027] By weight, the base mortar 2 comprises the following components: 35-55 parts sand (50-130 mesh), 3-5 parts white rubber granules (50-100μm), 15-25 parts water (H2O), 5-10 parts epoxy resin, 3-10 parts acrylic emulsion, 2-4 parts water-based coating toughening agent, 1-2 parts wetting and dispersing agent, and 1-3 parts silane coupling agent. The sand particles naturally form numerous irregular, interconnected micropores with certain sound absorption properties, especially high-frequency sound absorption. The formula for calculating the total loss factor of the base mortar-controlled board is based on the definition in Appendix E of "Acoustic Measurement of Sound Insulation of Buildings and Building Components Part 3: Laboratory Measurement of Airborne Sound Insulation of Building Components" (GB / T 19889.3), i.e. In the formula η total Let f be the total loss factor, and T be the frequency. R Let T be the reverberation time inside the plate. It is clear from the formula that when T... R The effect of damping by the base mortar will change; when f is a fixed value, η total It will then change accordingly;

[0028] By weight, the surface mortar 1 comprises the following components: 50-70 parts sand, 5-15 parts magnesium silicate (MgSiO3), 5-15 parts epoxy resin, and 15-25 parts water (H2O). Numerous irregular, interconnected micropores are naturally formed between the sand particles. The sand particles in the surface mortar and the base mortar are interconnected, resulting in a certain sound absorption performance, particularly prominent in the mid-to-high frequency range. This is because after sound waves enter the pores of the sand particles, some of the sound energy is converted into heat energy through the porous structure and absorbed, mainly affecting the high frequency range; the other part of the sound waves interferes and cancels each other out as they propagate between the sand particles, thus achieving a sound absorption effect in the mid-frequency range. The sound absorption coefficient is directly proportional to the mortar thickness.

[0029] Furthermore, the base mortar 2 and the surface mortar 1 also include a trace amount of color paste, which can be used to adjust the color of the mortar to achieve a decorative and aesthetic effect.

[0030] Furthermore, the mesh size of the sand particles in the base mortar 2 is 50-130.

[0031] Furthermore, the surface mortar 1 has a sand particle size of 30-100.

[0032] Furthermore, the diameter of the white rubber granules is 50–100 μm.

[0033] like Figure 1-2As shown, a construction method for an interior decorative mortar with both sound absorption and damping sound insulation functions is disclosed in this patent. The mortar is a pre-packaged liquid mortar in a bucket, ready for application upon leaving the factory. On-site application only requires uniform mixing. This mortar can be applied to the surface of various decorative panels 3, wherein the thickness of the decorative panel 3 is 1–50 mm, and the total thickness of the mortar coating is 5–15 mm. The decorative panel 3 includes, but is not limited to: gypsum-based panels (such as paper-faced gypsum board, GRG board, etc.), metal panels (such as steel plate, aluminum plate, alloy plate, etc.), and cement-based panels (such as fiber cement board, calcium silicate board, etc.). The method includes the following steps:

[0034] S1: Clean the decorative panels to ensure the surface is free of dust, impurities, and oil.

[0035] S2: Apply the base mortar 2 to the surface of the decorative board by scraping or spraying, with a coating thickness of 5-10mm; when the base mortar 2 is applied to the surface of the board, it has certain viscoelasticity and internal friction characteristics, and the mechanical energy of the board vibration is converted into heat energy, which can suppress the decay of the board vibration energy, regulate the reverberation time inside the board, and thus regulate the total loss factor of the board.

[0036] S3: The base mortar is applied in two layers: the first layer is used to fill the pores and gaps on the surface of the decorative panels; the second layer is used to achieve the required thickness for acoustic performance and to level the large area. Each layer must be allowed to dry naturally after completion.

[0037] S4: After the base mortar 2 is completed and dried, a surface mortar is applied to its surface. The thickness of the surface mortar is 5-10 mm.

[0038] Comparison example: bare GRG board, the sample is a 9mm thick GRG board with a surface density of 14.2 kg / m², and no mortar coating on the surface.

[0039] Example 1: GRG board was selected as a control sample. Its surface was sequentially coated with base mortar 2 and top mortar 1. The thickness of base mortar 2 was 5mm (using a spraying process), and the thickness of top mortar 1 was 5mm (using a spraying process). By weight, the base mortar 2 consisted of: 45 parts sand (mesh size 110-130), 5 parts white rubber granules (50-100μm), 23 parts water (H2O), 10 parts epoxy resin, 10 parts acrylic emulsion, 3 parts water-based coating toughening agent, 2 parts wetting and dispersing agent, and 2 parts silane coupling agent. The top mortar 1 consisted of: 70 parts sand, 5 parts magnesium silicate (MgSiO3), 5 parts epoxy resin, and 20 parts water (H2O), with a trace amount of colorant added for mortar color adjustment.

[0040] Example 2: Based on Example 1, the only difference is that the coating process of the base mortar 2 is changed from spraying to scraping, but the thickness remains the same. Other conditions are the same as in Example 1.

[0041] Example 3: Based on Example 1, the only difference is that the mesh size of the sand in the base mortar 2 is changed to 50-80, while other conditions are the same as in Example 1.

[0042] Example 4: Based on Example 1, the only difference is that the spraying thickness of the base mortar 2 is changed to 3mm, while other conditions are the same as in Example 1.

[0043] Example 5: Based on Example 1, the only difference is that the spraying thickness of the top mortar 1 is changed to 10mm, that is, the total thickness of the base layer and the top layer reaches 15mm, and other conditions are the same as in Example 1.

[0044] Table 1: Comparison of Sound Absorption Coefficients for Each Case

[0045]

[0046] Table 2: Total Loss Factors η for Each Case total Comparison Table

[0047]

[0048]

[0049] As can be seen from the table above, the mortar provided by this invention has both sound absorption and damping sound insulation functions.

[0050] In summary, the mortar provided by this invention is a finished liquid container, requiring only simple mixing on-site for use. This eliminates the need for on-site batching, metering, and secondary mixing required for traditional dry powder mortar, significantly improving construction efficiency and productivity. Regarding precision, a layered construction method is employed: the base mortar 2 fills pores and provides damping and sound insulation, while the surface mortar 1 provides acoustic absorption and decorative leveling. The layer thickness is controllable within the range of 5-15mm, ensuring uniform thickness and strong controllability, meeting the requirements of refined construction and acoustic performance design. In terms of efficiency, the base mortar 2 and surface mortar 1 perform different functions, with damping, sound insulation, sound absorption, and decoration all completed in a single construction process. This avoids the complexity of traditional multi-material, step-by-step construction, significantly shortening the construction period and improving overall construction efficiency. Regarding energy consumption, construction requires no high-temperature curing or additional energy-intensive processes; the mortar cures naturally upon drying, reducing energy consumption on-site. In terms of process simplification, the same mechanical equipment (mortar spraying machine or stone paint spraying machine) is used for the construction of the base layer and the surface layer, without the need to change the process equipment; the on-site construction process only includes cleaning → base layer coating → natural drying → surface layer coating → natural drying, which significantly reduces the number of process steps and facilitates large-scale promotion.

[0051] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0052] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0053] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. An interior decorative mortar with both sound absorption and damping sound insulation functions, comprising a base mortar and a surface mortar, characterized in that: By weight, the base mortar comprises the following components: 35-55 parts sand (50-130 mesh), 3-5 parts white rubber granules (50-100μm), 15-25 parts water (H2O), 5-10 parts epoxy resin, 3-10 parts acrylic emulsion, 2-4 parts water-based coating toughening agent, 1-2 parts wetting and dispersing agent, and 1-3 parts silane coupling agent; The surface mortar comprises the following components by weight: 50-70 parts sand, 5-15 parts magnesium silicate (MgSiO3), 5-15 parts epoxy resin, and 15-25 parts water (H2O).

2. The interior decorative mortar with both sound absorption and damping sound insulation functions as described in claim 1, comprising a base mortar and a surface mortar, characterized in that: The base mortar and surface mortar also include trace amounts of colorant.

3. The interior decorative mortar with both sound absorption and damping sound insulation functions as described in claim 1, comprising a base mortar and a surface mortar, characterized in that: The mesh size of the sand in the base mortar is 50-130.

4. The interior decorative mortar with both sound absorption and damping sound insulation functions as described in claim 1, comprising a base mortar and a surface mortar, characterized in that: The surface mortar has a sand particle size of 30-100.

5. The interior decorative mortar with both sound absorption and damping sound insulation functions as described in claim 1, comprising a base mortar and a surface mortar, characterized in that: The white rubber granules have a diameter of 50–100 μm.

6. A construction method for an interior decorative mortar that combines sound absorption and damping sound insulation functions, comprising the following steps: S1: Clean the decorative panels to ensure the surface is free of dust, impurities, and oil. S2: Apply the base mortar to the surface of the decorative board by scraping or spraying, with a coating thickness of 5-10mm; S3: The base mortar is applied in two layers: the first layer is used to fill the pores and gaps on the surface of the decorative panels; the second layer is used to achieve the required thickness for acoustic performance and to level the large area. Each layer must be allowed to dry naturally after completion. S4: After the base mortar is completed and dried, a topcoat mortar is applied to its surface. The thickness of the topcoat mortar is 5-10 mm.

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