CN111517746B - Fireproof sound absorption plate and preparation method thereof - Google Patents
Fireproof sound absorption plate and preparation method thereof Download PDFInfo
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- CN111517746B CN111517746B CN202010404676.2A CN202010404676A CN111517746B CN 111517746 B CN111517746 B CN 111517746B CN 202010404676 A CN202010404676 A CN 202010404676A CN 111517746 B CN111517746 B CN 111517746B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
- C04B28/344—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating materials
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The application provides a fire-resistant sound absorption plate and a preparation method thereof, and belongs to the technical field of fire-resistant sound absorption materials. The fire-resistant acoustic panel includes: inorganic particles, an inorganic binder and a curing agent; the combustion performance grade of the fire-resistant sound absorption plate reaches A1 grade, and the noise reduction coefficient NRC under the condition with a cavity is more than or equal to 0.6. The preparation method comprises the following steps: and stirring and mixing the inorganic adhesive, the inorganic particles and the curing agent uniformly to obtain a mixture. The mixture is placed in a mold and then shaped. And baking, curing and forming the mould and the mixture arranged in the mould. And demolding the mold and the solidified mixture to obtain the fireproof acoustic board. The fireproof sound absorption board prepared from the materials by the method has good sound absorption effect and fireproof performance.
Description
Technical Field
The application relates to the technical field of fire-resistant sound absorption materials, in particular to a fire-resistant sound absorption plate and a preparation method thereof.
Background
In general, the performance of the fireproof plate is stable, and the compactness is good; and the sound-absorbing panel generally has many sound-absorbing holes. Therefore, the existing plate cannot have the functions of fire resistance and sound absorption at the same time.
Disclosure of Invention
The application aims to provide a fireproof sound absorption plate and a preparation method thereof, and the fireproof sound absorption plate has fireproof and sound absorption functions.
In a first aspect, the present application provides a fire resistant acoustic panel comprising: inorganic particles, an inorganic binder, and a curing agent capable of curing the inorganic binder; the combustion performance grade of the fire-resistant sound absorption plate reaches A1 grade, and the noise reduction coefficient NRC under the condition with a cavity is more than or equal to 0.6.
The board meets the parameter conditions, and not only has good fire resistance, but also has excellent sound absorption performance.
In one possible embodiment, the inorganic binder is an aluminum dihydrogen phosphate binder. Alternatively, the aluminum dihydrogen phosphate binder has a density of 1.30 to 1.60g/cm3。
Aluminum dihydrogen phosphate is a commonly used refractory material, which can make the obtained plate have better refractory performance. And the aluminum dihydrogen phosphate is used as the only inorganic adhesive for preparing the plate, so that the cost of the adhesive can be reduced, and the strength and the bonding effect of the plate can be ensured.
In one possible embodiment, the curing agent is a curing agent capable of curing the aluminum dihydrogen phosphate adhesive, and the curing agent is capable of curing the aluminum dihydrogen phosphate at a temperature of 180 ℃ or higher.
After the curing agent is matched with aluminum dihydrogen phosphate, the aluminum dihydrogen phosphate adhesive can be cured, so that the plate has good fire resistance and excellent water resistance.
In one possible embodiment, 170-340kg of a mixture of inorganic binder and curing agent is added per cubic meter of inorganic particles.
The addition of the inorganic adhesive and the curing agent is controlled to be matched with the inorganic particles, so that the porosity and the pore diameter of the plate can be further controlled, and the sound absorption performance of the plate is better.
In one possible embodiment, the mass ratio of the curing agent to the inorganic binder is 1:0.8 to 1: 1.2. The curing effect of the plate can be better, and the plate has better strength and weather resistance.
In one possible embodiment, the inorganic particles have a particle size in the range of 0.1 to 5mm in an amount of not less than 95% by weight. Optionally, the weight ratio of the inorganic particles with a particle size range of 0.2-1mm is not less than 95%. Optionally, the inorganic particles comprise one or more of floating beads, vitrified micro bubbles, expanded perlite, ceramsite, artificial sand and river sand.
The inorganic particles are selected to be the particle size, so that the porosity and the pore diameter of the plate can be controlled, and the plate has high strength and good sound absorption performance.
In one possible embodiment, the inorganic particles are floating beads and the refractory acoustic panel has a bulk density of 0.5 to 1.0g/cm3The water absorption rate is 15-25%, the breaking strength is 1-3Mpa, the compressive strength is 2.5-5Mpa, the heat conductivity coefficient at 20 ℃ is 0.1-0.3W/(K.m), and the noise reduction coefficient NRC under the condition of a cavity is more than or equal to 0.7. The inorganic particles are ceramic particles, and the volume density of the fireproof acoustic board is 0.5-1.0g/cm3The water absorption rate is 10-20%, the breaking strength is 1-3Mpa, the compressive strength is 2.5-5Mpa, the heat conductivity coefficient at 20 ℃ is 0.2-0.4W/(K.m), and the noise reduction coefficient NRC under the condition of a cavity is more than or equal to 0.65. The inorganic particles are artificial sand, and the volume density of the fireproof acoustic board is 1.5-1.7g/cm3The water absorption rate is 8-12%, the breaking strength is 3-5Mpa, the compressive strength is 8-12Mpa, the heat conductivity coefficient at 20 ℃ is 0.3-0.6W/(K.m), and the noise reduction coefficient NRC under the condition of a cavity is more than or equal to 0.65.
The fireproof sound absorption plate meets the parameter performance, and has the advantages of fire resistance, sound absorption performance and good strength.
In a second aspect, the present application provides a method for manufacturing a fire-resistant acoustic panel, comprising the steps of: mixing: and stirring and mixing the inorganic adhesive, the inorganic particles and the curing agent uniformly to obtain a mixture. Die filling: the mixture is placed in a mold and then shaped. Baking: and baking, curing and forming the mould and the mixture arranged in the mould. Demolding: and demolding the mold and the solidified mixture to obtain the fireproof acoustic board.
The fireproof plate in the prior art is manufactured in a hot-press forming mode, the compactness of the hot-press formed plate is good, and the plate does not have a sound absorption function. In this application, adopt the mode of toasting solidification shaping to obtain panel, because have the space between the inorganic granule, toast and have very porous in the panel after the solidification shaping to make panel go upward on fire-resistant basis and have good sound absorption performance.
In one possible embodiment, the baking temperature is 180-; optionally, the baking time is 60-180min at the temperature of 250-350 ℃.
The curing agent can cure the inorganic adhesive in a short time by selecting the temperature range for baking, and the fireproof acoustic panel is formed.
In a possible embodiment, before baking, the method further comprises standing the mold and the mixture placed in the mold; wherein the standing temperature is lower than the baking temperature.
Before baking, the inorganic adhesive is kept stand in a relatively low-temperature environment, so that water in the inorganic adhesive is slowly evaporated, and the bending deformation of the plate is avoided.
In one possible embodiment, the resting temperature is 5-55 ℃ and the resting time is 6-24 h. Optionally, the standing temperature is above 5 deg.C, and the standing time is 10-16 h.
The deformation of the plate can be effectively improved by the standing temperature and the standing time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments are briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive efforts and also belong to the protection scope of the present application.
FIG. 1 is a flow chart of the preparation of a fire resistant acoustical panel provided in the examples of the present application;
FIG. 2 is a photograph of a fire resistant acoustical panel provided in example 2 of the present application;
fig. 3 is a photograph of a fire resistant acoustical panel provided in example 3 of the present application.
Detailed Description
Fig. 1 is a flow chart of a method for manufacturing a fire-resistant sound-absorbing panel according to an embodiment of the present invention. Referring to fig. 1, a method for manufacturing a fire resistant sound absorbing panel includes the following steps:
s1, mixing: and stirring and mixing the inorganic adhesive, the inorganic particles and the curing agent uniformly to obtain a mixture.
Optionally, the inorganic binder and the curing agent capable of curing the inorganic binder are mixed uniformly, and then mixed with the inorganic particles, so that the mixture can be mixed more uniformly.
In the examples of the present application, the weight ratio of particles having a particle size in the range of 0.1 to 5mm in the inorganic particles is not less than 95%. Optionally, the weight ratio of the inorganic particles with a particle size range of 0.2-1mm is not less than 95%. The inorganic particles are selected to be the particle size, so that the porosity and the pore diameter of the plate can be controlled, and the plate has high strength and good sound absorption performance.
Optionally, the inorganic particles comprise one or more of floating beads, vitrified micro bubbles, expanded perlite, ceramsite, artificial sand and river sand. The inorganic particles of the above kind need to be able to withstand high temperatures of 1100 ℃ or more, and may be single inorganic particles or mixed inorganic particles.
In the embodiment of the present application, the inorganic adhesive is an aluminum dihydrogen phosphate adhesive. The aluminum dihydrogen phosphate adhesive may be a commercially available aluminum dihydrogen phosphate adhesive, and the application is not limited thereto. Aluminum dihydrogen phosphate is a commonly used refractory material, which can make the obtained plate have better refractory performance. And the aluminum dihydrogen phosphate is used as the only inorganic adhesive for preparing the plate, so that the cost of the adhesive can be reduced, and the strength and the bonding effect of the plate can be ensured.
Alternatively, the aluminum dihydrogen phosphate binder has a density of 1.30 to 1.60g/cm3. In some possible embodiments, the aluminum dihydrogen phosphate binder has a density of 1.30g/cm3、1.40g/cm3、1.50g/cm3Or 1.60g/cm3。
In the embodiment of the application, the curing agent is capable of curing the aluminum dihydrogen phosphate adhesive, and the curing agent can cure the aluminum dihydrogen phosphate at a temperature of more than 180 ℃. After the curing agent is matched with aluminum dihydrogen phosphate, the aluminum dihydrogen phosphate adhesive can be cured, so that the plate has good fire resistance and excellent water resistance.
In other embodiments, the inorganic adhesive may be other commercially available inorganic adhesives that can withstand high temperatures, such as: silicates, phosphates, sulfates, or borates; mixtures of inorganic binders are also possible, for example: a mixture of an aluminum phosphate solution and copper monoxide powder.
Alternatively, the curing agent may be a mixture of metal oxides, such as: alumina, iron oxide, copper oxide, and the like. Other oxides are also possible, for example: silicon dioxide. In the present application, the curing agent may be a commercially available curing agent, and any curing agent capable of curing the inorganic binder is within the scope of the present application.
In the embodiment of the application, 170-340kg of the mixture of the inorganic adhesive and the curing agent is added in each cubic meter of the inorganic particles. Wherein, the inorganic particles per cubic meter means that the volume of the inorganic particles is 1m when the inorganic particles are closely packed3. The addition of the inorganic adhesive and the curing agent is controlled to be matched with the inorganic particles, so that the porosity and the pore diameter of the plate can be further controlled, and the sound absorption performance of the plate is better.
In some possible embodiments, the mixture of inorganic binder and curing agent is added in an amount of 170kg, 200kg, 250kg, 300kg or 340kg per cubic meter of the inorganic particles.
Optionally, the mass ratio of the curing agent to the inorganic binder is 1:0.8-1: 1.2. The curing effect of the plate can be better, and the plate has better strength and weather resistance. For example: the mass ratio of the curing agent to the inorganic adhesive is 1:0.8, 1:0.9, 1:1.0, 1:1.1 or 1: 1.2.
Optionally, the inorganic binder and the curing agent can be completely cured by baking at a temperature of 180 ℃ or higher for 30min or more.
In other embodiments, the raw materials include 30 to 150 parts by weight of the inorganic particles, 10 to 20 parts by weight of the aluminum dihydrogen phosphate, and 10 to 20 parts by weight of the curing agent. In some possible embodiments, the weight parts of inorganic particles in the feedstock are 30, 50, 70, 90, 110, 130, or 150 parts; 10, 15 or 20 parts of aluminum dihydrogen phosphate; the weight portion of the curing agent is 10, 15 or 20 portions.
S2, die filling: the mixture is placed in a mold and then shaped. Alternatively, the mixture is placed in a mold and then shaped in the mold by beating, compacting or vibrating, for example: forming a plate-shaped structure.
S3, standing: standing the mold and the mixture in the mold; wherein the standing temperature is lower than the baking temperature.
The inventor researches and discovers that the aluminum dihydrogen phosphate and the curing agent are used for realizing material curing, but when the aluminum dihydrogen phosphate and the curing agent are directly baked during manufacturing, the plate can be bent and deformed after being formed. The inventors further investigated that the reason why the bending deformation occurs is: in the rapid heating process of the aluminum dihydrogen phosphate, moisture contained in the aluminum dihydrogen phosphate can be rapidly evaporated, the evaporation speed of the surface layer and the bottom layer of the manufactured plate is inconsistent, and the curing speed is inconsistent, so that stress is generated, and the plate is bent and deformed after being formed.
Therefore, in the present application, the baking is preceded by a low temperature standing for a certain period of time. The standing may be at room temperature or low-temperature baking. The water loss speed in the aluminum dihydrogen phosphate can be controlled, so that the water in the aluminum dihydrogen phosphate is slowly evaporated, and the deformation problem of the material can be greatly reduced.
In other embodiments, the plate may not be allowed to stand still and may deform to some extent without affecting the fire resistance and sound absorption of the plate.
Optionally, the standing temperature is 5-55 deg.C, and the standing time is 6-24 h. In some possible embodiments, the standing temperature is 5 ℃ and the standing time is 24 hours; or the standing temperature is 55 ℃, and the standing time is 6 hours; or standing at 10 deg.C for 20 hr; or standing at 20 deg.C for 15 hr.
Further, the standing temperature is above 5 ℃ and the standing time is 10-16 h.
S4, baking: and baking, curing and forming the mould and the mixture arranged in the mould.
The inventor researches and discovers that the fireproof plate in the prior art is made in a hot-press forming mode, the hot-press formed plate is good in compactness and high in strength, and the plate does not have a sound absorption function.
In this application, adopt the mode of toasting solidification shaping to obtain panel, because have the space between the inorganic granule, toast and have very porous in the panel after the solidification shaping to make panel go upward on fire-resistant basis and have good sound absorption performance.
Optionally, the baking temperature is 180-. In some possible embodiments, the baking temperature is 180 ℃ and the baking time is 240 min; or the baking temperature is 600 ℃, and the baking time is 30 min; or the baking temperature is 300 ℃ and the baking time is 100 min.
Further, the baking time is 60-180min at the temperature of 250-350 ℃.
S5, demolding: and demolding the mold and the solidified mixture to obtain the fireproof acoustic board.
The combustion performance grade of the fire-resistant sound absorption plate prepared by the method reaches A1 grade, and the noise reduction coefficient NRC under the condition with a cavity is more than or equal to 0.6. The board has good fire resistance and excellent sound absorption performance.
Optionally, the inorganic particles are floating beads and the refractory acoustic panel has a bulk density of 0.5 to 1.0g/cm3The water absorption rate is 15-25%, the breaking strength is 1-3Mpa, the compressive strength is 2.5-5Mpa, the heat conductivity coefficient at 20 ℃ is 0.1-0.3W/(K.m), and the noise reduction coefficient NRC under the condition of a cavity is more than or equal to 0.7.
In some possible embodiments, the fire resistant acoustical panel has a bulk density of 0.5g/cm3、0.6g/cm3、0.7g/cm3、0.8g/cm3、0.9g/cm3Or 1.0g/cm3The water absorption rate is 15%, 20% or 25%, the breaking strength is 1Mpa, 2Mpa or 3Mpa, the compression strength is 2.5Mpa, 3Mpa, 3.5Mpa, 4Mpa, 4.5Mpa or 5Mpa, the thermal conductivity coefficient at 20 ℃ is 0.1W/(K.m), 0.2W/(K.m) or 0.3W/(K.m), and the noise reduction coefficient NRC under the condition of a cavity is 0.7, 0.75 or 0.8.
In another embodiment, the inorganic particles are ceramic particles and the refractory acoustic panel has a bulk density of 0.5 to 1.0g/cm3The water absorption rate is 10-20%, the breaking strength is 1-3Mpa, the compressive strength is 2.5-5Mpa, the heat conductivity coefficient at 20 ℃ is 0.2-0.4W/(K.m), and the noise reduction coefficient NRC under the condition of a cavity is more than or equal to 0.65.
In some possible embodiments, the fire resistant acoustical panel has a bulk density of 0.5g/cm3、0.6g/cm3、0.7g/cm3、0.8g/cm3、0.9g/cm3Or 1.0g/cm3The water absorption rate is 10%, 15% or 20%, the breaking strength is 1Mpa, 2Mpa or 3Mpa, the compression strength is 2.5Mpa, 3Mpa, 3.5Mpa, 4Mpa, 4.5Mpa or 5Mpa, the thermal conductivity coefficient at 20 ℃ is 0.2W/(K.m), 0.3W/(K.m) or 0.4W/(K.m), and the noise reduction coefficient NRC under the condition of a cavity is 0.65, 0.7 or 0.75.
In another embodiment, the inorganic particles are artificial sand and the refractory acoustic panel has a bulk density of 1.5 to 1.7g/cm3The water absorption rate is 8-12%, the breaking strength is 3-5Mpa, the compressive strength is 8-12Mpa, the heat conductivity coefficient at 20 ℃ is 0.3-0.6W/(K.m), and the noise reduction coefficient NRC under the condition of a cavity is more than or equal to 0.65.
In some possible embodiments, the fire resistant acoustical panel has a bulk density of 1.5g/cm3、1.6g/cm3Or 1.7g/cm3The water absorption rate is 8%, 10% or 12%, the breaking strength is 3Mpa, 4Mpa or 5Mpa, the compression strength is 8Mpa, 9Mpa, 10Mpa, 11Mpa or 12Mpa, the thermal conductivity coefficient at 20 ℃ is 0.3W/(K.m), 0.4W/(K.m), 0.5W/(K.m) or 0.6W/(K.m), and the noise reduction coefficient NRC under the condition of a cavity is 0.65, 0.7 or 0.75.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
A fire-resistant sound-absorbing board is made of sintered haydite with 3-5mm of particle material and the compact packing density of haydite is 500kg/m3. The dosage of each cubic meter of the materials is as follows: 500kg of ceramsite, 100kg of aluminium dihydrogen phosphate and 100kg of curing agent.
The preparation method comprises the following steps:
s1, uniformly stirring the aluminum dihydrogen phosphate and the curing agent, and uniformly stirring the aluminum dihydrogen phosphate and the curing agent with the ceramsite to obtain a mixture;
s2, placing the mixture into a mold, and then molding the mixture by beating, compacting or vibrating;
s3, standing the mixture and the die for 12 hours at 25 ℃;
s4, baking the mixture and the die for 1h at 500 ℃, and then curing and forming;
and S5, demolding after curing.
Example 2
A fire-resistant sound-absorbing board uses floating beads with particle material of 0.2-0.8mm, and the close packing density of the floating beads is 350kg/m3. The dosage of each cubic meter of the materials is as follows: 350kg of floating beads, 150kg of aluminum dihydrogen phosphate and 150kg of curing agent.
The preparation method comprises the following steps:
s1, uniformly stirring aluminum dihydrogen phosphate and a curing agent, and then uniformly stirring the aluminum dihydrogen phosphate and the curing agent with floating beads to obtain a mixture;
s2, placing the mixture into a mold, and then molding the mixture by beating, compacting or vibrating;
s3, standing the mixture and the die for 12 hours at 25 ℃;
s4, baking the mixture and the die at 200 ℃ for 4 hours, and then curing and forming;
and S5, demolding after curing.
Example 3
A fire-resistant sound-absorbing board uses floating beads with particle material of 0.2-0.8mm, and the close packing density of the floating beads is 350kg/m3. The dosage of each cubic meter of the materials is as follows: 350kg of floating beads, 150kg of aluminum dihydrogen phosphate and 150kg of curing agent.
The preparation method comprises the following steps:
s1, uniformly stirring aluminum dihydrogen phosphate and a curing agent, and then uniformly stirring the aluminum dihydrogen phosphate and the curing agent with floating beads to obtain a mixture;
s2, placing the mixture into a mold, and then molding the mixture by beating, compacting or vibrating;
s3, baking the mixture and the die at 200 ℃ for 4 hours, and then curing and forming;
and S4, demolding after curing.
Example 4
Fire-resistant acoustic boardThe artificial sand with the particle material of 1-5mm is used, and the compact packing density of the artificial sand is 1350kg/m3. The dosage of each cubic meter of the materials is as follows: 1350kg of artificial sand, 130kg of aluminum dihydrogen phosphate and 130kg of curing agent.
The preparation method comprises the following steps:
s1, uniformly stirring aluminum dihydrogen phosphate and a curing agent, and then uniformly stirring the aluminum dihydrogen phosphate and the curing agent with artificial sand to obtain a mixture;
s2, placing the mixture into a mold, and then molding the mixture by beating, compacting or vibrating;
s3, standing the mixture and the mold for 10 hours at 28 ℃.
And S4, baking the mixture and the die for 2 hours at 400 ℃, and then curing and molding.
And S5, demolding after curing.
Comparative example 1
A refractory plate is prepared from floating beads (0.2-0.8 mm in diameter) and the close-packed density of floating beads is 350kg/m3. The dosage of each cubic meter of the materials is as follows: 350kg of floating beads, 150kg of aluminum dihydrogen phosphate and 150kg of curing agent.
The preparation method comprises the following steps:
s1, uniformly stirring aluminum dihydrogen phosphate and a curing agent, and then uniformly stirring the aluminum dihydrogen phosphate and the curing agent with floating beads to obtain a mixture;
s2, placing the mixture into a mold, and then molding the mixture by beating, compacting or vibrating;
s4, carrying out hot-pressing shaping on the mixture and the die in a hot-pressing cavity of a hot press at the temperature of 200 ℃ for 4 hours;
and S5, demolding after hot pressing.
Experimental example 1
The panels in examples 1 to 4 and comparative example 1 were subjected to a fire performance grade a1 test, and were tested according to the fire performance grades of GB 8624-:
TABLE 1 flammability performance of the sheets
As can be seen from Table 1, after inspection, all the panels were found to have a fire performance meeting the requirements specified in A1 class, and the fire performance of the panels could reach the non-combustible A (A1) class.
Experimental example 2
The performance of the parameters of the sheets provided in examples 1 to 4 and comparative example 1 were measured to obtain table 2:
TABLE 2 Parametric Properties of the sheets
| Item | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Detection standard |
| Bulk density g/cm3 | 0.65 | 0.56 | 0.56 | 1.55 | 0.64 | GB/T5486 |
| Water absorption% | 14.0 | 19.9 | 19.9 | 10.8 | 15.5 | GB/T7019 |
| Flexural strength Mpa | 1.5 | 1.2 | 1.2 | 4.1 | 2.2 | GB/T7019 |
| Compressive strength Mpa | 4.0 | 3.7 | 3.7 | 10.5 | 5.0 | GB/T50081 |
| Thermal conductivity at 20 ℃ W/(K. m) | 0.30 | 0.21 | 0.21 | 0.45 | 0.15 | GB/T10294 |
| Noise reduction coefficient NRC with cavity | 0.65 | 0.75 | 0.75 | 0.65 | 0.55 | GB/T20247 |
As can be seen from table 2, examples 1-4 provide panels with superior sound absorption and noise reduction properties compared to comparative example 1.
Experimental example 3
Fig. 2 and 3 were obtained by photographing the fire resistant sound absorbing panel provided in example 2 and example 3, respectively, wherein fig. 2 is a photograph of the fire resistant sound absorbing panel provided in example 2, and fig. 3 is a photograph of the fire resistant sound absorbing panel provided in example 3. As can be seen from FIGS. 2 and 3, the bending deformation of the fire-resistant sound-absorbing panel can be effectively avoided by standing before baking.
The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (9)
1. A fire-resistant acoustic panel, characterized in that the fire-resistant acoustic panel is composed of inorganic particles, an inorganic binder and a curing agent capable of curing the inorganic binder;
the inorganic adhesive is aluminum dihydrogen phosphate adhesive, and the density of the aluminum dihydrogen phosphate adhesive is 1.30-1.60g/cm3；
The weight ratio of the particles with the particle size range of 0.1-5mm in the inorganic particles is not less than 95 percent;
the inorganic particles are artificial sand, and the volume density of the fireproof acoustic board is 1.5-1.7g/cm3The water absorption rate is 8-12%, the breaking strength is 3-5Mpa, the compressive strength is 8-12Mpa, the heat conductivity coefficient at 20 ℃ is 0.3-0.6W/(K.m), and the noise reduction coefficient NRC under the condition of a cavity is more than or equal to 0.65;
the curing agent is capable of curing the aluminum dihydrogen phosphate adhesive and can cure aluminum dihydrogen phosphate at a temperature of more than 180 ℃;
the fire-resistant sound absorption board achieves the grade of A1 combustion performance.
2. The fire resistant acoustical panel of claim 1 wherein 170-340kg of the mixture of the inorganic binder and the curing agent is added per cubic meter of the inorganic particles.
3. The fire resistant acoustical panel of claim 2 wherein the mass ratio of the curing agent to the inorganic binder is from 1:0.8 to 1: 1.2.
4. A method for manufacturing the fire resistant acoustic panel according to any one of claims 1 to 3, comprising the steps of:
mixing: stirring and mixing the inorganic adhesive, the inorganic particles and the curing agent uniformly to obtain a mixture;
die filling: placing the mixture in a mold, and then forming the mixture;
baking: baking, curing and molding the mold and the mixture placed in the mold;
demolding: and demolding the mold and the solidified mixture to obtain the fireproof acoustic board.
5. The method for preparing the fire-resistant acoustic panel according to claim 4, wherein the baking temperature is 180-.
6. The method for preparing the fire-resistant acoustic panel according to claim 5, wherein the baking is performed at 350 ℃ for 60-180 min.
7. The method for producing the fire-resistant acoustic panel according to any one of claims 4 to 6, further comprising, before the baking, leaving the mold and the mixture placed in the mold;
wherein the standing temperature is lower than the baking temperature.
8. The method for preparing the fire-resistant acoustic panel according to claim 7, wherein the standing temperature is 5 to 55 ℃ and the standing time is 6 to 24 hours.
9. The method for producing the fire-resistant acoustic panel according to claim 8, wherein the standing temperature is 5 ℃ or higher and the standing time is 10 to 16 hours.
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| CN1051033A (en) * | 1989-10-20 | 1991-05-01 | 湖北省襄樊市胶粘技术研究所 | Non-burning antifire light profile and manufacture method thereof |
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