CN114262197B - Sound insulation mortar, sound insulation layer and sound insulation floor - Google Patents
Sound insulation mortar, sound insulation layer and sound insulation floor Download PDFInfo
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- CN114262197B CN114262197B CN202210168952.9A CN202210168952A CN114262197B CN 114262197 B CN114262197 B CN 114262197B CN 202210168952 A CN202210168952 A CN 202210168952A CN 114262197 B CN114262197 B CN 114262197B
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Abstract
The application belongs to the building field, specifically discloses a sound insulation mortar, sound insulation layer and sound insulation floor, and the sound insulation mortar includes A component and B component, and according to the weight percent content based on A component gross weight, the A component includes: 20% -30% of cement; 40% -60% of heavy aggregate; 0-25% of powder; 5% -15% of a multi-layer structure material; 0.1% -1% of hollow fiber; the component B comprises the following components in percentage by weight based on the total weight of the component B: 10% -30% of rubber emulsion; 70% -90% of water. The sound insulation mortar provided by the application can improve the sound insulation effect of the mortar on low frequency, and can ensure that the mortar has enough use strength.
Description
Technical Field
The application belongs to the field of buildings, and particularly relates to sound insulation mortar, a sound insulation layer and a sound insulation floor slab.
Background
Along with the development of society, the noise pollution of cities is more and more, and especially in commercial housing, because the density between the buildings is low, the floor is connected closely, and often tiny sound or vibration can become serious noise pollution. The harm of noise pollution to the health and daily life of people is increasingly paid attention to, and the problem of how to provide a quiet and comfortable living environment for people through sound insulation of building materials is increasingly concerned, so that the sound insulation function of buildings is gradually improved in various building functions.
In the existing building materials, the sound insulation effect is obtained mainly by using sound insulation mortar. However, in order to improve the sound insulation, a large amount of rubber aggregate, rubber powder or micro-beads and other components are usually added into the existing sound insulation mortar, so that the strength of the mortar is seriously reduced; in addition, the existing sound insulation mortar is poor in sound insulation effect on low frequency (around 160 Hz), and particularly, high low frequency sound is easy to cause serious adverse interference on sleep of people at night.
Disclosure of Invention
In view of this, the present application provides a sound insulation mortar, a sound insulation layer, and a sound insulation floor slab, which have a good sound insulation effect on low frequencies and can maintain the strength of the mortar.
The application provides a sound insulation mortar in a first aspect, which comprises a component A and a component B, wherein the component A comprises the following components in percentage by weight based on the total weight of the component A:
20% -30% of cement; 40% -60% of heavy aggregate; 0-25% of powder; 5% -15% of a multi-layer structure material; 0.1% -1% of hollow fiber;
the component B comprises the following components in percentage by weight based on the total weight of the component B:
10% -30% of rubber emulsion; 70-90% of water.
According to any embodiment of the first aspect of the present application, the rubber emulsion is selected from one or more of natural rubber emulsion, styrene-butadiene emulsion, nitrile-butadiene emulsion, chloroprene emulsion, styrene-acrylic emulsion and vinyl acetate-ethylene copolymer emulsion.
According to any embodiment of the first aspect of the present application, the weight ratio of the component A to the component B is 100 (20-30), preferably 100 (25-28).
According to any embodiment of the first aspect of the present application, the multilayer structure material is selected from at least one of mica and exfoliated vermiculite; preferably, the average particle size of the multilayer structure material is 0.53 mm-2.46 mm.
According to any embodiment of the first aspect of the present application, the hollow fibers are selected from at least one of hollow natural fibers and hollow synthetic fibers.
According to any of the embodiments of the first aspect of the present application, the hollow fiber has a hollow tubule structure, and preferably, the outer diameter of the hollow tubule is less than 0.2 mm.
According to any one of the embodiments of the first aspect of the present application, the hollow tubule has a length of 1.5mm to 9 mm.
According to any one of the embodiments of the first aspect of the present application, the heavy aggregate is selected from one or more of barium sulfate sand, garnet sand and copper ore sand; preferably, the average particle size of the heavy aggregate is 0.38 mm-1.18 mm; and/or
The powder material is selected from mica powder or vermiculite powder; preferably, the average particle size of the powder is 0.075mm or less.
The second aspect of the application provides a sound insulation layer, which is obtained by hydrating the sound insulation mortar provided by the first aspect of the application.
The third aspect of the application provides a sound insulation floor slab, which comprises the sound insulation layer provided by the second aspect of the application.
Compared with the prior art, the method has the following beneficial effects:
the sound insulation mortar provided by the application is added with the rubber emulsion, the multilayer structure material and the hollow fiber, wherein the use of the rubber emulsion can not only improve the sound insulation effect of the sound insulation mortar on low frequency, but also modify and bond cement, so that the sound insulation mortar can play a role in elastic bonding after the mortar is cured; the hollow fiber and the multilayer structure material can effectively absorb and reduce the transmission of sound waves, so that the sound insulation performance of the product can be further improved. Therefore, through the use of the rubber emulsion, the multilayer structure material and the hollow fiber, the addition of components such as rubber aggregate, rubber powder or micro-beads in the sound insulation mortar is reduced, and the mortar is ensured to have enough use strength.
Detailed Description
In order to make the application purpose, technical solution and beneficial technical effects of the present application clearer, the present application is further described in detail with reference to the following embodiments. It should be understood that the embodiments described in this specification are only for the purpose of explaining the present application and are not intended to limit the present application.
For the sake of brevity, only some numerical ranges are explicitly disclosed herein. However, any lower limit may be combined with any upper limit to form ranges not explicitly recited; and any lower limit may be combined with any other lower limit to form a range not explicitly recited, and similarly any upper limit may be combined with any other upper limit to form a range not explicitly recited. Also, although not explicitly recited, each point or individual value between endpoints of a range is encompassed within the range. Thus, each point or individual value can form a range not explicitly recited as its own lower or upper limit in combination with any other point or individual value or in combination with other lower or upper limits.
In the description herein, it is to be noted that, unless otherwise specified, "above" and "below" are inclusive, and "a plurality" of "one or more" means two or more.
The above summary of the present application is not intended to describe each disclosed embodiment or every implementation of the present application. The following description more particularly exemplifies illustrative embodiments. At various points throughout this application, guidance is provided through a list of embodiments that can be used in various combinations. In each instance, the list is merely a representative group and should not be construed as exhaustive.
In the research process, the inventor finds that in order to improve the sound insulation, excessive rubber or micro-beads are usually added into the existing sound insulation mortar, namely, elastic low-density granules are embedded into continuous and rigid cement to generate the sound insulation effect, so that the strength of the mortar body is seriously reduced. In addition, in the prior art, the application of rubber in mortar generally adopts the form of rubber aggregate or rubber powder, the internal components of the rubber and the structure of the rubber are not further researched, and mortar with better sound insulation effect, particularly better low-frequency sound insulation effect is developed.
The present application has been made in view of the discovery and analysis of the above-mentioned technical problems.
According to a first aspect of the embodiments of the present application, there is provided a sound insulation mortar, comprising a component A and a component B, wherein the component A comprises, by weight percentage based on the total weight of the component A:
20% -30% of cement; 40% -60% of heavy aggregate; 0-25% of powder; 5% -15% of a multi-layer structure material; 0.1% -1% of hollow fiber;
the component B comprises the following components in percentage by weight based on the total weight of the component B:
10% -30% of rubber emulsion; 70-90% of water.
In the embodiment of the application, the sound insulation mortar is added with the rubber emulsion, the multilayer structure material and the hollow fiber, wherein the rubber emulsion can not only improve the sound insulation effect of the sound insulation mortar on low frequency, but also modify and bond cement, so that the sound insulation mortar can play a role in elastic bonding after being cured; the hollow fiber and the multilayer structure material can effectively absorb and reduce the transmission of sound waves, so that the sound insulation performance of the product can be further improved. Therefore, the addition of components such as rubber aggregate, rubber powder or micro-beads in the sound insulation mortar is reduced by combining the rubber emulsion, the multilayer structure material and the hollow fibers, so that the use strength of the mortar body is improved.
In some embodiments, the sound insulation mortar comprises a component A and a component B, wherein the component A comprises the following components in percentage by weight based on the total weight of the component A:
20% -30% of cement; 40% -55% of heavy aggregate; 5% -15% of powder; 5% -15% of a multi-layer structure material; 0.5% -1% of hollow fiber;
the component B comprises the following components in percentage by weight based on the total weight of the component B:
15% -25% of rubber emulsion; 75-85% of water.
In the embodiment of the application, elastic rubber emulsion is introduced into the sound insulation mortar, so that the sound insulation effect of the mortar on low frequency can be effectively improved, and the elastic bonding effect on the mortar is achieved, so that the weighted sound insulation quantity is improved while the strength of the mortar body is ensured.
In the embodiment of the application, the weighting sound insulation quantity is a single-value index representing the sound insulation performance of the building component, and represents the sound insulation characteristic of the impact sound of the floor slab by using a single value, so that the weighting sound insulation quantity is used for comparing the sound insulation performance of different floor slabs and comparing the weighting sound insulation performance with the standard requirement to judge whether the sound insulation performance of the impact sound of the floor slab reaches the standard or not. For floor impact sound, the lower the weighted sound insulation quantity of the member is, the better the sound insulation performance is. The sound insulation reading indicated by 500Hz on the standard curve is the weighted sound insulation of the impact sound.
In some embodiments, the rubber emulsion is selected from one or more of natural rubber emulsion, styrene-butadiene emulsion, nitrile-butadiene emulsion, neoprene emulsion, styrene-acrylic emulsion, and vinyl acetate-ethylene copolymer emulsion (VAE emulsion). Preferably, the styrene-acrylic emulsion has a low glass transition temperature Tg.
In the embodiment of the application, after the rubber emulsion is added, the rubber emulsion can bond cement and other particles in mortar to form a bonded multilayer structure. When meeting the impact, when the impact meets the multilayer structure that elastic rubber latex emulsion bonded in the sound insulation mortar in the transmission process, the elastic bonding can vibrate low frequency, and multilayer structure materials and other high-density particles in the mortar can vibrate middle and high frequency, so that sound wave energy is dissipated and is attenuated to a greater extent, thereby effectively isolating the transmission of the impact on low frequency and middle and high frequency, and especially playing a sound insulation role on low frequency.
In some embodiments, the weight ratio of the component A to the component B is 100 (20-30), preferably 100 (25-28).
In the embodiment of the application, after the component A and the component B are mixed, a gelling system of elastic latex and cement is formed, a continuous or semi-continuous gelling system of elastic latex bonding is formed after cement hydration and latex film forming, and then other low-density and high-density granular materials contained in the multiple layers of the component A are inlaid, so that impact sound of low-frequency vibration can be better absorbed, and the sound insulation effect of the sound insulation mortar to low frequency is improved.
In some embodiments, the type of cement is not particularly limited, and may be selected according to actual needs. The cement commonly used in the field can be selected, and preferably, the strength of the cement is more than 42.5.
In some embodiments, the multilayer structure material is selected from mica or expanded vermiculite. Preferably, the multilayer structure material is a layered mineral particle. More preferably, the average particle size of the multilayer structure material is 0.53mm to 2.46 mm.
In some embodiments, the hollow fibers are selected from hollow natural fibers or hollow synthetic fibers.
In some embodiments, the hollow fibers are hollow tubule structures. Preferably, the outer diameter of the hollow fine tube is less than 0.2 mm. More preferably, the length of the hollow thin tube is 1.5 mm-9 mm. More preferably, the aspect ratio of the hollow tubule is greater than 4: 1.
In the embodiment of the application, the average grain of the multilayer structure material and the length, the outer diameter and the length-diameter ratio of the hollow fiber are controlled in a proper range, so that the rubber emulsion is favorably bonded and coated on the average grain of the multilayer structure material and the hollow fiber, and a multilayer structure bonded by the rubber emulsion is formed, namely, the multilayer structure bonded by the rubber emulsion is favorably embedded with the grains of the multilayer structure material and the hollow fiber, and the sound insulation performance is provided for the sound insulation mortar.
In some embodiments, the hollow synthetic fibers comprise one or more of polypropylene fibers, polyacrylonitrile fibers, polyvinyl formal fibers, polyamide fibers, and polyethylene terephthalate fibers.
In some embodiments, the heavy aggregate is selected from one or more of barium sulfate sand, garnet sand, and copper ore sand; preferably, the average particle size of the heavy aggregate is 0.38 mm-1.18 mm; more preferably, the average particle size of the heavy aggregate is 0.50mm to 1.15 mm.
In the embodiment of the application, the average particle size of the heavy aggregate is controlled within a proper range, so that the sound insulation effect of the mortar on high frequency is favorably realized, and the strength of the mortar can be improved.
In some embodiments, the powder is selected from mica powder or vermiculite powder. Preferably, the average particle size of the powder is 0.075mm or less. In the embodiment of the application, the powder is favorable for improving the consistency of the sound insulation mortar, so that the sound insulation mortar is not easy to cause hollowing and cracking.
In some embodiments, the component A also comprises other optional additives, including water retention agents, water reducing agents, early strength agents, air entraining agents and the like. Preferably, the types and the amounts of the optional additives can be added according to the actual use requirements.
In some embodiments, component B further includes other optional adjuvants including film forming aids, anti-freeze agents, anti-foam agents, thickeners, preservatives, and the like. Preferably, the types and the amounts of the optional auxiliary agents can be added according to the actual use requirements.
In the embodiment of the application, the additives and the auxiliary agents can achieve better workability on the sound insulation mortar, and the sound insulation effect of the sound insulation mortar is favorably improved.
In the sound insulation mortar of the embodiment of the application, the type of the water-retaining agent is not particularly limited and can be selected according to actual requirements.
In some embodiments, the water retaining agent may be selected from one or more of polyacrylamide, sodium polyacrylate, potassium polyacrylate, and ammonium polyacrylate. The water-retaining agent can enable the sound insulation mortar to have good heat insulation performance after being used for buildings.
In the sound insulation mortar of the embodiment of the application, the type of the water reducing agent is not particularly limited and can be selected according to actual requirements.
In some embodiments, the water reducing agent may be selected from one or more of lignosulfonates, sulfamates, fatty acids, and polycarboxylates. Wherein, the water reducing agent can play a role in dispersing and lubricating cement.
In the sound insulation mortar of the embodiment of the application, the type of the early strength agent is not particularly limited and can be selected according to actual requirements.
In some embodiments, the early strength agent may be selected from one or more of sodium sulfate, potassium sulfate, calcium chloride, sodium chloride, aluminum chloride, triethanolamine, and triisopropanolamine. The early strength agent can improve the strength of cement in mortar and reduce the consumption of the early strength agent.
In the sound insulation mortar of the embodiment of the application, the type of the air entraining agent is not particularly limited, and can be selected according to actual requirements.
In some embodiments, the air entraining agent may be selected from one or more of rosin resins, alkyl benzene sulfonates, and fatty alcohol sulfonates. The air entraining agent can improve the volume stability of the sound insulation mortar, enhance the weather resistance of the sound insulation mortar, improve the frost resistance, the salt resistance, the impermeability and the sulfate corrosion resistance of the sound insulation mortar, and prolong the service life.
In the sound insulation mortar of the embodiment of the application, the type of the film forming additive is not particularly limited and can be selected according to actual requirements.
In some embodiments, the coalescent may be selected from one or more of ethylene glycol, propylene glycol, hexylene glycol, lauryl alcohol esters, ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, hexylene glycol butyl ether acetate, and ethyl 3-ethoxypropionate. The film-forming assistant can greatly improve the film-forming property of the rubber emulsion, and improve the coalescence, weather resistance, scrub resistance and color development property of the rubber emulsion, so that the formed film has good storage stability.
In the sound insulation mortar of the embodiment of the application, the type of the antifreezing agent is not particularly limited, and can be selected according to actual requirements.
In some embodiments, the anti-freeze agent may be selected from one or more of methanol, ethanol, isopropanol, ethylene glycol, propylene glycol, diethylene glycol, ethylene glycol butyl ether, propylene glycol butyl ether, ethylene glycol butyl ether acetate, methylene chloride, 1-dichloroethane, 1, 2-dichloroethane, dimethyl sulfoxide, formamide, calcium chloride, sodium acetate, and magnesium chloride. The antifreezing agent can reduce the freezing point of the rubber emulsion, improve the low-temperature storage stability of the coating, adjust the drying speed during emulsion construction, and improve the apparent effect of the coating.
In the sound insulation mortar of the embodiment of the application, the type of the defoaming agent is not particularly limited, and can be selected according to actual requirements.
In some embodiments, the anti-foaming agent may be selected from one or more of mineral oils or silicones. The defoaming agent can eliminate or reduce bubbles in the production and construction processes of the emulsion, and is favorable for improving the compactness of the coating and improving the appearance of the coating.
In the sound insulation mortar of the embodiment of the application, the type of the thickener is not particularly limited, and can be selected according to actual requirements.
In some embodiments, the thickener may be selected from one or more of cellulose ethers, polyacrylates, associative polyurethanes, and inorganic thickeners.
In the sound insulation mortar of the embodiment of the application, the type of the preservative is not particularly limited, and can be selected according to actual requirements.
In some embodiments, the preservative may be selected from isothiazolinone or 2, 2-dibromopropionamide. The preservative is beneficial to preventing the degradation of microorganisms to an emulsion system, and can solve a series of problems of mildew, deterioration, fermentation, stink generation, emulsion breaking and the like of the emulsion caused by bacterial infection.
In the sound insulation mortar provided by the embodiment of the application, the elastic bonding provided by the rubber emulsion can be used for bonding the mortar body or the base layer and can be kept effective for a long time under the long-term service condition.
In a second aspect, the application provides a sound insulation layer, which comprises the sound insulation mortar provided in the first aspect.
The third aspect of the application provides a sound insulation floor slab, which comprises the sound insulation layer provided by the second aspect of the application.
Examples
The present disclosure is more particularly described in the following examples that are intended as illustrative only, since various modifications and changes within the scope of the present disclosure will be apparent to those skilled in the art. Unless otherwise stated, all parts, percent ratios, and ratios reported in the following examples are on a weight basis, and all reagents used in the examples are commercially available or synthesized according to conventional methods and can be used directly without further treatment, and the equipment used in the examples is commercially available.
Wherein mica is purchased from Jinshou county Deheng mineral products company, and has 8-30 meshes; sericite powder is purchased from Anhui silk new materials, Inc. of Chuzhou, and is 200 meshes in trademark; the butylbenzene emulsion is purchased from BASF (China) limited company, and is of a brand 7190, and the solid content is 50%; the expanded vermiculite is purchased from Yao Xin mineral product processing factory company in Lingshou county, 8-30 meshes; the rubber powder is purchased from Sendzein, Inc. and is 20 meshes in mark; the hollow fiber is purchased from Lai chemical fiber company with a mark of 6mm, and the cellulose ether is hydroxypropyl methyl cellulose ether purchased from Tiansheng company with a mark of MK 100000. Other materials are commercially available.
Example 1
A sound insulation mortar comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: P.O 42.5.5 parts of cement, 200 parts; 200 parts of mica; 5 parts of hollow fiber (6 mm); 488.5 parts of barium sulfate sand; 100 parts of sericite powder; 3 parts of calcium formate; 1 part of sodium abietate; 2.5 parts of cellulose ether;
the component B comprises the following components in parts by weight: 120 parts of butylbenzene emulsion; 800 parts of water; 2 parts of benzisothiazolinone preservative;
the weight ratio of the component A to the component B is 100: 25.
Examples 2 to 10 and comparative examples 1 to 5
The cement mortars of examples 2 to 10 and comparative examples 1 to 5 were prepared in a similar manner to the cement mortar of example 1, but the contents of some components in the cement mortar were adjusted, and the parameters of the contents of the different components are detailed in table 1.
Test section
The sound insulation mortars of the above examples 1 to 10 and comparative examples 1 to 5 were subjected to the relevant performance tests, and the test results are shown in table 1.
TABLE 1
In table 1, "-" indicates that the substance is not included.
The test method comprises the following steps:
(1) impact sound improvement amount test: the test was carried out as specified in GB/T19889.8.
(2) Testing the strength of the mortar body: the test was carried out according to the test method for cement mortar strength (ISO method) of GB-T17671-1999.
Comparative analysis of examples 1-10 and comparative example 1 shows that the impact sound improvement amount (Δ L, dB) of the mortar is significantly increased after the rubber emulsion is added in examples 1-10 compared with the mortar without the rubber emulsion, which indicates that the sound insulation effect of the mortar can be improved by adding the rubber emulsion; meanwhile, the weighted impact sound improvement amount (Lw, dB) of the mortar is also larger, which shows that the addition of the rubber emulsion can especially improve the sound insulation effect of the mortar on low frequency. Comparative analysis examples 1-10 and comparative example 2 show that, compared with the addition of rubber powder, the addition of the rubber emulsion can not only improve the sound insulation effect of the mortar, but also improve the body strength of the mortar. Comparing and analyzing the examples 1-10 and the comparative examples 3-5, it can be seen that the sound insulation effect of the mortar can be improved by adding the hollow fibers and the multi-layer materials.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. The sound insulation mortar is characterized by comprising a component A and a component B, wherein the component A comprises the following components in percentage by weight based on the total weight of the component A:
20% -30% of cement; 40% -60% of heavy aggregate; 5-25% of powder; 5% -15% of a multi-layer structure material; 0.1% -1% of hollow fiber;
wherein the average particle size of the heavy aggregate is 0.50-1.15 mm; the powder is selected from mica powder or vermiculite powder, and the average particle size of the powder is less than 0.075 mm; the multilayer structure material is selected from at least one of mica and expanded vermiculite, and the average particle size of the multilayer structure material is 0.53-2.46 mm; the aspect ratio of the hollow fiber is greater than 4: 1;
the component B comprises the following components in percentage by weight based on the total weight of the component B:
10% -30% of rubber emulsion; 70% -90% of water;
the weight ratio of the component A to the component B is 100 (20-30).
2. The sound insulation mortar of claim 1, wherein the rubber emulsion is one or more selected from natural rubber emulsion, styrene-butadiene emulsion, butyronitrile emulsion, chloroprene emulsion, styrene-acrylic emulsion and vinyl acetate-ethylene copolymer emulsion.
3. The sound insulation mortar of claim 1, wherein the weight ratio of the component A to the component B is 100 (25-28).
4. The sound-insulating mortar of claim 1, wherein the hollow fibers are selected from at least one of hollow natural fibers and hollow synthetic fibers.
5. The sound insulation mortar of claim 4, wherein the hollow fibers are of a hollow tubule structure, wherein the outer diameter of the hollow tubules is less than 0.2 mm.
6. The sound insulation mortar of claim 5, wherein the hollow tubules have a length of 1.5mm to 9 mm.
7. The sound insulation mortar of claim 1, wherein the heavy aggregate is selected from one or more of barium sulfate sand, garnet sand and copper ore sand.
8. A sound-insulating layer obtained by hydrating the sound-insulating mortar according to any one of claims 1 to 7.
9. An acoustical insulation floor comprising the acoustical insulation layer of claim 8.
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| CN114958096B (en) * | 2022-07-26 | 2022-11-01 | 佛山市科顺建筑材料有限公司 | Sound insulation coating, preparation method and sound insulation building |
| CN116102296A (en) * | 2022-12-01 | 2023-05-12 | 河南嘉方实业有限公司 | Low-carbon sound-insulation floor mortar |
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