Novel sound barrier plate

Abstract

The invention relates to a novel sound barrier plate, and belongs to the field of buildings and engineering. The formula comprises a bottom layer material formula and a surface layer material formula, wherein the bottom layer material formula comprises the following components in percentage by mass: 38-50% of diatomite; 15-30% of blast furnace slag; 5-12% of calcite; 2-6% of calcined talc; 2-5% of potassium feldspar; 3-8% of kaolin; 5 to 13% of bentonite; 5-10% of quartz; 2-6% of iron oxide red; 0.2%-0.8% of a foaming agent; 0.1 to 0.4 percent of a water reducing agent; the formula of the surface layer material comprises the following components in percentage by mass: 32-55% of perlite micro powder; 15-27% of calcined talc; 17 to 27% of bentonite; 4-10% of kaolin; 0.1-0.3% of a foaming agent; 0.1 to 0.4 percent of a water reducing agent; the preparation method of the sound barrier plate adopts a secondary material distribution forming process. The foamed ceramic composite sound barrier plate is of a double-layer structure and is provided with the sound insulation back plate; and through high-temperature firing, layering and cracking are avoided in use. The bottom-layer material replaces a base plate, so that the process production cost is reduced; the surface of the bottom layer material is flat after foaming and firing, cutting is not needed, and material waste is reduced. According to the invention, blast furnace slag is used as a raw material, which is an effective way for turning blast furnace slag into wealth.

Description

Technical Field

[0001] The invention relates to a novel sound barrier board and belongs to the field of architecture and engineering. Background Art

[0002] Traditional sound barrier materials mainly include glass wool, rock wool and organic foam. Although glass wool and rock wool have good sound absorption effects, their performance is greatly affected by the environment. When the air humidity is high, the sound absorption performance of these materials will be significantly reduced after absorbing moisture. Organic foam has a low density, good sound insulation effect and is easy to install, but it cannot be used in harsh environments, such as high temperature, strong airflow and oil pollution.

[0003] At present, foamed ceramic sound barrier panels have become one of the main research directions of sound-absorbing materials due to their good sound absorption ability, high temperature resistance, corrosion resistance, and low moisture absorption. Foamed ceramic sound barrier panels have been recognized by the market, and their market share is growing year by year. After the foaming process, the surface of foamed ceramics is mostly uneven and needs to be cut flat before use, which causes waste. When used as a sound barrier panel, a backboard is generally added as a sound insulation layer, which can achieve better sound insulation effect. Summary of the invention

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A novel sound barrier board, the formula of which is divided into a base material formula and a surface material formula, and the mass percentage of the base material formula is:

[0006]

[0007] The mass percentage of the surface material formula is:

[0008]

[0009] The method for preparing the sound barrier board adopts a secondary cloth molding process.

[0010] Preferably, the molding steps of the secondary cloth molding process are:

[0011] (1) Weigh according to the formula;

[0012] (2) The weighed raw materials are put into a ball mill and ground into slurry. The slurry grinding fineness is 250 mesh sieve residue ≤ 2 grams, and the slurry aging time is ≥ 24 hours;

[0013] (3) The ground slurry is powdered in a spray drying tower; the moisture content of the powder produced by the spray drying tower is 9-12%, and the aging time of the powder is ≥24 hours;

[0014] (4) The powder produced by the spray drying tower enters the powder silo for aging;

[0015] (5) The press machine presses the fabric for the second time, and the pressing pressure is 300-400 kg / cm2; the thickness of the bottom layer is controlled to be 3mm-30mm, and the thickness of the surface layer is controlled to be 20mm-60mm;

[0016] (6) Kiln drying;

[0017] (7) Kiln firing: the highest firing temperature is 1100-1200℃, firing time: 2-8 hours;

[0018] (8) Cutting and packaging.

[0019] Preferably, the foaming agent is silicon carbide.

[0020] Preferably, the grinding fineness of the mud is 250 mesh residue = 1.5 grams, and the mud aging time is 26 hours.

[0021] Preferably, the moisture content of the powder produced by the spray drying tower is 10%, and the aging time of the powder is 30 hours.

[0022] Preferably, the pressing pressure is 350 kg / cm2.

[0023] Preferably, the maximum sintering temperature is 1180°C.

[0024] Blast furnace slag is one of the main by-products of blast furnace ironmaking. my country's annual metallurgical slag emissions are about 100 million, of which blast furnace slag accounts for as much as 50%. Its chemical composition percentage is SiO2: Al2O3: CaO: MgO: Fe2O3: Na2O: K2O: IL = 32.98: 15.36: 36.89: 10.26: 0.5: 0.5: 0.53: 1.75.

[0025] It adopts secondary cloth pressing molding process (the traditional molding process is to use mold filling molding process), no mold drying, no mold (pad) firing, that is, direct open flame firing in the roller kiln. Compared with other current mold firing processes, it can greatly reduce energy consumption and save costs.

[0026] Through the secondary cloth forming process, the bottom layer is laid with a closed-cell formula foamed ceramic material, and the surface layer is laid with a completely different open-cell formula foamed ceramic material, and by adjusting the formula and process parameters, the foamed ceramic materials of the surface layer and the bottom layer will not separate due to expansion during the high-temperature firing process. The pores of the upper and lower layers of the obtained foamed ceramic are completely different. The surface layer is an open-cell high-pore foamed ceramic that can be used as a sound barrier board, and the bottom layer is a closed-cell foamed ceramic that can be used as a backboard. The composite sound insulation board obtained in this way integrates a conventional sound barrier board and a backboard, is easy to use, the surface of the closed-cell bottom layer is relatively flat, and no cutting is required. Only the surface of the open-cell surface layer needs to be cut, which reduces material waste by half.

[0027] The foamed ceramic composite sound barrier board obtained by the secondary cloth molding process of the present invention can adjust the thickness of the surface layer and the bottom layer, so ordinary foamed ceramic sound barrier boards and foamed ceramic composite sound barrier boards can be produced at the same time; the thickness of the surface layer is increased to a certain extent, and after firing is completed, the foamed ceramic sound barrier board of the required thickness is cut from the surface layer, and the remaining is still a complete foamed ceramic composite sound barrier board.

[0028] The beneficial effects of the present invention are:

[0029] The foamed ceramic composite sound barrier board obtained by the present invention has a double-layer structure and a self-contained sound insulation back plate; it is fired at high temperature and will not delaminate or crack during use. The bottom layer replaces the backing plate, which reduces the process production cost; the surface of the bottom layer is relatively flat after foaming and firing, and no cutting is required, which reduces material waste.

[0030] The invention adopts blast furnace slag as raw material, which is an effective way to turn blast furnace slag into treasure.

[0031] It can meet customized needs. While producing foamed ceramic composite sound barrier panels, it can also produce ordinary foamed ceramic sound barrier panels, which are practical and beautiful. DETAILED DESCRIPTION

[0032] Example 1

[0033] A novel sound barrier board, the formula of which is divided into a base material formula and a second surface material formula, the mass percentage of the base material formula is:

[0034]

[0035]

[0036] The mass percentage of the second surface material formula is:

[0037]

[0038] The method for preparing the sound barrier board adopts a secondary cloth molding process.

[0039] The molding steps of the secondary cloth molding process are:

[0040] (1) Weigh according to the formula;

[0041] (2) The weighed raw materials are put into a ball mill and ground into slurry. The slurry grinding fineness is 250 mesh residue equal to 2 grams, and the slurry aging time is 24 hours;

[0042] (3) The ground slurry is powdered in a spray drying tower; the moisture content of the powder produced by the spray drying tower is 9%, and the powder aging time is 24 hours;

[0043] (4) The powder produced by the spray drying tower enters the powder silo for aging;

[0044] (5) The press machine presses the fabric for the second time, and the pressing pressure is 350 kg / cm2; the thickness of the bottom layer is controlled to be 3 mm, and the thickness of the surface layer is controlled to be 20 mm;

[0045] (6) Kiln drying;

[0046] (7) Kiln firing: the maximum firing temperature is 1180°C, firing time: 2 hours;

[0047] (8) Cutting and packaging.

[0048] Example 2

[0049] A novel sound barrier board, the formula of which is divided into a base material formula and a second surface material formula, the mass percentage of the base material formula is:

[0050]

[0051]

[0052] The mass percentage of the second surface material formula is:

[0053]

[0054] The method for preparing the sound barrier board adopts a secondary cloth molding process.

[0055] The molding steps of the secondary cloth molding process are:

[0056] (1) Weigh according to the formula;

[0057] (2) The weighed raw materials are put into a ball mill and ground into slurry. The slurry grinding fineness is 250 mesh residue equal to 2 grams, and the slurry aging time is 24 hours;

[0058] (3) The ground slurry is powdered in a spray dryer; the moisture content of the powder produced by the spray dryer is 12%, and the powder aging time is 24 hours;

[0059] (4) The powder produced by the spray drying tower enters the powder silo for aging;

[0060] (5) The press machine presses the fabric for the second time, and the pressing pressure is 300 kg / cm2; the thickness of the bottom layer is controlled to be 30 mm, and the thickness of the surface layer is controlled to be 60 mm;

[0061] (6) Kiln drying;

[0062] (7) Kiln firing: the maximum firing temperature is 1160°C, firing time: 3 hours;

[0063] (8) Cutting and packaging.

[0064] Example 3

[0065] A novel sound barrier board, the formula of which is divided into a base material formula and a second surface material formula, the mass percentage of the base material formula is:

[0066]

[0067] The mass percentage of the second surface material formula is:

[0068]

[0069] The method for preparing the sound barrier board adopts a secondary cloth molding process.

[0070] The molding steps of the secondary cloth molding process are:

[0071] (1) Weigh according to the formula;

[0072] (2) The weighed raw materials are put into a ball mill and ground into slurry. The slurry grinding fineness is 250 mesh sieve residue equal to 1.5 grams, and the slurry aging time is 26 hours;

[0073] (3) The ground slurry is powdered in a spray drying tower; the moisture content of the powder produced by the spray drying tower is 10%, and the powder aging time is 30 hours;

[0074] (4) The powder produced by the spray drying tower enters the powder silo for aging;

[0075] (5) The press machine presses the fabric for the second time, and the pressing pressure is 350 kg / cm2; the thickness of the bottom layer is controlled to be 8 mm, and the thickness of the surface layer is controlled to be 19 mm;

[0076] (6) Kiln drying;

[0077] (7) Kiln firing: the maximum firing temperature is 1180°C, firing time: 8 hours;

[0078] (8) Cutting and packaging.

[0079] Example 4

[0080] A novel sound barrier board, the formula of which is divided into a base material formula and a second surface material formula, the mass percentage of the base material formula is:

[0081]

[0082] The mass percentage of the second surface material formula is:

[0083]

[0084]

[0085] The method for preparing the sound barrier board adopts a secondary cloth molding process.

[0086] The molding steps of the secondary cloth molding process are:

[0087] (1) Weigh according to the formula;

[0088] (2) The weighed raw materials are put into a ball mill and ground into slurry. The slurry grinding fineness is 250 mesh sieve residue equal to 1.7 grams, and the slurry aging time is 27 hours;

[0089] (3) The ground slurry is powdered in a spray dryer; the moisture content of the powder produced by the spray dryer is 12%, and the powder aging time is 27 hours;

[0090] (4) The powder produced by the spray drying tower enters the powder silo for aging;

[0091] (5) The press machine performs secondary pressing and forming of the cloth, with a pressing pressure of 400 kg / cm2; the thickness of the bottom layer is controlled at 15, and the thickness of the surface layer is controlled at 48;

[0092] (6) Kiln drying;

[0093] (7) Kiln firing: the maximum firing temperature is 1200°C, and the firing time is 5 hours;

[0094] (8) Cutting and packaging.

[0095] Table 1 Surface layer detection indicators

[0096] Porosity% Water absorption by mass% <![CDATA[Volume density kg / m 3 > Compressive strength mpa Example 1 63 155 245 4.6 Example 2 74 235 310 4.3 Example 3 58 140 350 5.1 Example 4 78 285 210 4.6

[0097] Table 2 Bottom layer detection indicators

[0098] Volume water absorption% <![CDATA[Bulk density kg / m 3 > Flexural strength mpa Tensile strength mpa Example 1 2.1 450 4.9 0.48 Example 2 1.8 580 4.3 0.41 Example 3 2.5 680 5.5 0.51 Example 4 1.7 410 4.5 0.39

[0099] It can be seen from Table 1 and Table 2 that the sound barrier board obtained by the present invention has a surface layer with good porosity and strength, and a bottom layer also has good density and strength. It is a qualified sound barrier board with its own backboard.

Claims

1. A new type of sound barrier board, characterized in that: The formula is divided into a base material formula and a surface material formula, and the mass percentage of the base material formula is: The mass percentage of the surface material formula is: The method for preparing the sound barrier board adopts a secondary cloth molding process.

2. A novel sound barrier panel according to claim 1, characterized in that: The molding steps of the secondary cloth molding process are: (1) Weigh according to the formula; (2) The weighed raw materials are put into a ball mill and ground into slurry. The slurry grinding fineness is 250 mesh sieve residue ≤ 2 grams, and the slurry aging time is ≥ 24 hours; (3) The ground slurry is powdered in a spray drying tower; the moisture content of the powder produced by the spray drying tower is 9-12%, and the aging time of the powder is ≥24 hours; (4) The powder produced by the spray drying tower enters the powder silo for aging; (5) The press machine presses the fabric for the second time, and the pressing pressure is 300-400 kg / cm2; the thickness of the bottom layer is controlled to be 3mm-30mm, and the thickness of the surface layer is controlled to be 20mm-60mm; (6) Kiln drying; (7) Kiln firing: the highest firing temperature is 1160-1200°C, firing time: 2-8 hours; (8) Cutting and packaging.

3. A novel sound barrier panel according to claim 1, characterized in that: The foaming agent is silicon carbide.

4. A novel sound barrier panel according to claim 2, characterized in that: The grinding fineness of the mud is 250 mesh residue = 1.5 grams, and the mud aging time is 26 hours.

5. The novel sound barrier panel according to claim 2 is characterized in that: The moisture content of the powder produced by the spray drying tower is 10%, and the aging time of the powder is 30 hours.

6. The novel sound barrier panel according to claim 2 is characterized in that: The pressing pressure is 350 kg / cm2.

7. The novel sound barrier panel according to claim 2 is characterized in that: The maximum firing temperature is 1180°C.

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