CN114085062B - Sound-absorbing board and application thereof - Google Patents
Sound-absorbing board and application thereof Download PDFInfo
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- CN114085062B CN114085062B CN202210058719.5A CN202210058719A CN114085062B CN 114085062 B CN114085062 B CN 114085062B CN 202210058719 A CN202210058719 A CN 202210058719A CN 114085062 B CN114085062 B CN 114085062B
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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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
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Building Environments (AREA)
- Laminated Bodies (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention relates to the technical field of building materials, in particular to a sound-absorbing plate and application thereof.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to an acoustic board with good acoustic absorption and decoration effects and application thereof.
Background
With the acceleration of urbanization and the increasing of living standard, people put forward higher and higher requirements on the comfort level of the residential environment of buildings, in recent years, noise is used as a pollution source to often influence the life and health of residents, such as factory noise, residential noise, traffic noise, construction noise and the like, the noise pollution is reduced, and the requirements on creating quiet life and working environment are increasingly urgent.
The sound absorption and absorption materials are often adopted for reducing indoor noise in buildings, mineral wool sound insulation boards, fiber sound absorption boards, foam concrete partition walls, aerated bricks, calcium silicate boards and the like are mostly adopted as the sound absorption materials at present, however, mineral wool sound insulation boards and fiber sound absorption boards are mostly organic materials, the fireproof effect, the impact resistance and the waterproof effect are poor, mildew and buckling deformation are caused in the service process, the service life is influenced, the foam concrete partition walls and the aerated bricks are different in quality, the sound insulation effect is not obvious, and the calcium silicate boards have the advantages of being flame retardant and impact resistant, large in density, high in price, inconvenient to construct and the like. Moreover, bolts are often adopted for fixing the construction process of the existing sound-absorbing board, and the sound-absorbing board is often broken in the punching process, so that the sound-insulating effect is influenced.
PET foaming board has light, heat retaining good function, is widely used in interior decoration in recent years, however, PET foaming board produces a large amount of discarded PET crushed aggregates in production, processing, use, demolish the in-process, and the PET crushed aggregates is mostly piled up or is handled as rubbish at present, compares in the useless foam recycle rate of other types extremely low, causes the wasting of resources.
Phosphogypsum is used as an industrial byproduct generated in the process of producing phosphoric acid by a sulfuric acid method, occupies a large amount of land in the stacking process, easily causes soil and underground water pollution, and because the phosphogypsum is acidic and contains harmful impurities such as soluble phosphorus, fluorine and the like, the recycling process of the phosphogypsum often needs treatments such as neutralization, flash combustion, flotation and the like, so that the treatment cost is increased.
Therefore, the sound-absorbing board has a good sound-insulating effect, and can greatly utilize waste materials, so that the sound-insulating and environment-friendly requirements are met.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an acoustic board and application thereof. By adopting the phosphogypsum, the superfine microspheres and the carbide slag as main active substances and utilizing a large amount of waste PET particles, the sound-absorbing board with good sound-absorbing and decorating effects is prepared, and meanwhile, the industrial wastes are utilized in a large amount, so that the sound-absorbing board is energy-saving and environment-friendly.
Specifically, the sound-absorbing board comprises a gypsum sound-absorbing layer, wherein the gypsum sound-absorbing layer is prepared from the following raw materials in parts by weight:
200 portions and 300 portions of ardealite,
50-80 parts of superfine micro-beads,
20-40 parts of carbide slag,
3-5 parts of re-dispersible latex powder,
2-4 parts of polycyclic aromatic sulfonate,
0.5 to 0.8 portion of sodium polyacrylate,
2-3 parts of a foaming agent,
40-60 parts of waste PET particles,
1-3 parts of a water-proofing agent,
90-120 parts of water.
The invention adopts phosphogypsum, superfine microbeads and carbide slag as main active substances, the phosphogypsum is used as an industrial byproduct generated in the process of producing phosphoric acid by a sulfuric acid method, the main component of the phosphogypsum is calcium sulfate dihydrate, the content of the calcium sulfate dihydrate is very high, part of insoluble impurities and soluble impurities exist, the insoluble impurities mainly comprise apatite, quartz, insoluble phosphorus pentoxide and part of phosphate, the insoluble impurities basically have no harm to the performance of the phosphogypsum, and the insoluble impurities influencing the performance of the phosphogypsum mainly comprise soluble phosphorus, fluorine and alkali metal salt. The invention focuses on the sound absorption effect of a plate product, compared with a cement-based material, the water requirement in the gypsum hydration process is lower, the paste is looser, and the light sound absorption effect is more excellent.
Preferably, the ultrafine micro-beads are derived from ultrafine particles collected from flue gas of a thermal power plant, the particle size is less than 5 microns, the water demand ratio is less than 90%, and the 28d activity index is more than 105%. Compared with fly ash, the ultrafine micro-beads have finer particle size and lower water demand, compared with mineral powder, the ultrafine micro-beads have higher sphericity and more obvious ball effect, compared with silica fume, the ultrafine micro-beads can reduce the consistency of slurry, although the silica fume can improve the viscosity and water-retaining property of the slurry and is beneficial to the stability of foam pores, the experimental process of the applicant finds that the slurry formed by adopting the phosphogypsum and the carbide slag is different from cement-based slurry, and the phosphogypsum-carbide slag slurry adopting the ultrafine micro-beads has better fluidity and more proper viscosity, shows the thick and non-sticky effect, is more beneficial to foaming and foam stabilization, improves the suspension effect of PET particles in the slurry and enables the distribution of the PET particles to be more uniform; the ultrafine micro-beads are rich in a large amount of active silicon dioxide, can exert the volcanic ash effect in the alkaline system of the invention to generate a large amount of gel, reinforce the gypsum hydration product, improve the strength and the water resistance of the hole wall and improve the adhesive force of the slurry.
Preferably, the redispersible latex powder is ethylene-vinyl acetate rubber powder. The redispersible latex powder can improve the adhesive force between the inorganic slurry and the organic PET, and adjust the opening time of the slurry to keep the initial setting time of the slurry at about 6 hours, thereby being beneficial to the manufacture of the acoustic panel.
Preferably, the foaming agent is at least one of a vegetable protein foaming agent and hydrogen peroxide.
Preferably, the particle size of the waste PET particles is 0.5 to 2 mm. The invention adds the waste PET particles as light aggregate, which is obtained by crushing and screening leftover materials generated in the preparation process of the PET foamed sheet or waste PET foamed sheets. The inventor recycles the waste PET particles in the earlier stage to prepare heat-preservation concrete with good effect, and prepares a PET-aluminum plate which accords with a heat-preservation decorative plate, and the inventor discovers that the waste PET particles are recycled, different from the recycling of the waste EPS particles in the prior art, the EPS particles prepared by crushing the waste EPS are basically closed EPS spherical particles, the PET foamed plate is multi-formed into particles with open pores on the surface in the crushing process and has more excellent sound absorption effect, but due to the porous structure on the surface, the dispersibility and the bonding force of the particles in the gypsum foamed slurry are poor, and the foamed slurry is easy to collapse, and the invention adds polycyclic aromatic sulfonate and sodium polyacrylate on the basis of adopting a foaming agent, the polycyclic aromatic sulfonate can form fine small bubbles compared with the foaming agent and is adsorbed on the open pores of the PET particles, a 'buoyancy ball' type closed pore structure similar to EPS is formed, so that the damage to bubbles formed by the foaming agent is reduced; the sodium polyacrylate has a certain water reducing effect, compared with a polycarboxylic acid water reducing agent and a naphthalene water reducing agent, the sodium polyacrylate has a low water reducing rate, but the viscosity of the prepared gypsum slurry is more moderate, the sodium polyacrylate and the polycyclic aromatic sulfonate are combined with the redispersible latex powder, so that the foamed slurry formed by phosphogypsum-superfine microbead-carbide slag under the action of the foaming agent has good fluidity, suspension property and cohesive force, waste PET particles are uniformly dispersed in the slurry, after the slurry is solidified, fine through holes are generated on the walls of partial bubbles due to the surface porous characteristic of the waste PET particles, and the energy of sound waves in a propagation path is quickly attenuated by the structure of the fine through holes-uniform large bubbles, so that the sound absorbing effect of a gypsum sound absorbing layer is greatly improved.
Preferably, the water repellent is calcium stearate. Research shows that calcium stearate has good waterproof and hydrophobic capabilities, and the acoustic board prepared by adding the calcium stearate has a good hydrophobic effect.
Preferably, the sound-absorbing plate further comprises a PET foam plate arranged on the outer side of the gypsum sound-absorbing layer. In order to further improve the sound absorption and decoration effects of the sound absorption board, the PET foaming board can be arranged on the outer side of the gypsum sound absorption layer, the PET foaming board is a product sold in the market, and the slurry can be directly paved on the PET foaming board for solidification and use due to the strong slurry bonding force of the gypsum sound absorption layer.
Preferably, the thickness of the gypsum sound absorption layer and the PET foaming plate can be adjusted in any proportion according to the decorative effect and the sound absorption effect, and more preferably, the gypsum sound absorption layer and the PET foaming plate are arranged in the same thickness.
Preferably, in order to further improve the sound absorption effect of the sound absorption plate, the surface sound absorption holes are formed in the PET foaming plate in a pressed mode.
The invention also relates to a preparation process of the sound-absorbing board, which specifically comprises the following preparation steps:
1) preparing waste PET particles, weighing the components according to the proportion,
2) mixing water with polycyclic aromatic sulfonate and sodium polyacrylate, and adding waste PET particles, phosphogypsum, superfine microspheres, carbide slag, redispersible latex powder and a waterproof agent for mixing;
3) adding a foaming agent into the mixture obtained in the step 2), quickly stirring and foaming, uniformly stirring, and forming.
When the sound-absorbing board is provided with the PET foaming board, the step 3) of the sound-absorbing board preparation process further comprises the following steps before molding: and (3) paving a PET foaming plate in the mould.
The invention also relates to the application of the sound-absorbing board in the fields of ceilings, partition boards and decorative panels.
The invention utilizes a large amount of industrial wastes, is beneficial to reducing cost and waste, and the prepared acoustic board has good acoustic absorption effect and good decorative effect.
Detailed Description
The present invention will be further illustrated by reference to the following examples, wherein the starting materials are commercially available and the experimental procedures are conventional unless otherwise specified.
The sound-absorbing boards of the embodiment and the comparative examples respectively comprise a gypsum sound-absorbing layer and a PET (polyethylene terephthalate) foamed board arranged on the outer side of the gypsum sound-absorbing layer, the gypsum sound-absorbing layer and the PET foamed board are arranged in the same thickness, hydrogen peroxide is used as a foaming agent, calcium stearate is used as a waterproof agent, the proportions of the gypsum sound-absorbing layers are different between the different embodiments and the comparative examples, the PET foamed boards are the same, and the surface sound-absorbing holes are formed in the PET foamed boards in a pressed mode.
Example 1
The sound absorption board comprises a gypsum sound absorption layer and a sound absorption layer, wherein the gypsum sound absorption layer consists of the following raw materials in parts by weight:
260 parts of phosphogypsum, 260 parts of gypsum,
70 parts of ultra-fine micro-beads,
35 parts of carbide slag, namely, calcium carbide slag,
3.5 parts of re-dispersible latex powder,
2.5 parts of polycyclic aromatic sulfonate,
0.6 part of sodium polyacrylate, namely,
3 parts of a foaming agent, namely 3 parts of,
46 parts of waste PET particles are added into the mixture,
2 parts of a water-proofing agent,
and 110 parts of water.
The detection proves that the gypsum sound-absorbing layer slurry has good fluidity and cohesiveness, the waste PET particles are uniformly dispersed, the heat conductivity coefficient of the sound-absorbing board is 0.078W/(m.K), and the noise reduction coefficient is 0.77.
Example 2
The sound absorption board comprises a gypsum sound absorption layer and a sound absorption layer, wherein the gypsum sound absorption layer consists of the following raw materials in parts by weight:
300 parts of phosphogypsum, namely 300 parts of phosphogypsum,
56 parts of superfine micro-beads, namely,
40 parts of carbide slag, namely 40 parts of carbide slag,
4 parts of re-dispersible latex powder,
3 parts of polycyclic aromatic sulfonate, namely,
0.7 part of sodium polyacrylate,
2.5 parts of a foaming agent,
52 parts of waste PET particles are added into the PET powder,
2 parts of a water-proofing agent,
and 115 parts of water.
The detection proves that the gypsum sound-absorbing layer slurry has good fluidity and cohesiveness, the waste PET particles are uniformly dispersed, the heat conductivity coefficient of the sound-absorbing board is 0.076W/(m.K), and the noise reduction coefficient is 0.79.
Example 3
The sound absorption board comprises a gypsum sound absorption layer and a sound absorption layer, wherein the gypsum sound absorption layer consists of the following raw materials in parts by weight:
240 parts of phosphogypsum, namely,
78 parts of ultra-fine micro-beads,
34 parts of carbide slag, namely 34 parts of carbide slag,
5 parts of re-dispersible latex powder,
2.4 parts of polycyclic aromatic sulfonate,
0.7 part of sodium polyacrylate,
2.8 parts of a foaming agent,
55 parts of waste PET particles, namely PET particles,
2 parts of a water-proofing agent,
100 parts of water.
The detection proves that the gypsum sound-absorbing layer slurry has good fluidity and cohesiveness, the waste PET particles are uniformly dispersed, the heat conductivity coefficient of the sound-absorbing board is 0.079W/(m.K), and the noise reduction coefficient is 0.78.
Comparative example 1
The sound absorption board comprises a gypsum sound absorption layer and a sound absorption layer, wherein the gypsum sound absorption layer consists of the following raw materials in parts by weight:
300 parts of phosphogypsum, namely 300 parts of phosphogypsum,
56 parts of fly ash, namely 56 parts of fly ash,
40 parts of carbide slag, namely 40 parts of carbide slag,
4 parts of re-dispersible latex powder,
3 parts of polycyclic aromatic sulfonate, namely,
0.7 part of sodium polyacrylate,
2.5 parts of a foaming agent,
52 parts of waste PET particles are added into the PET powder,
2 parts of a water-proofing agent,
and 115 parts of water.
The detection shows that the gypsum sound-absorbing layer slurry has high viscosity, the waste PET particles are uniformly dispersed, the foam part is broken, the heat conductivity coefficient of the sound-absorbing board is 0.42W/(m.K), and the noise reduction coefficient is 0.51.
Comparative example 2
The sound absorption board comprises a gypsum sound absorption layer and a sound absorption layer, wherein the gypsum sound absorption layer consists of the following raw materials in parts by weight:
300 parts of phosphogypsum, namely 300 parts of phosphogypsum,
56 parts of silicon ash, namely 56 parts of silicon ash,
40 parts of carbide slag, namely 40 parts of carbide slag,
4 parts of re-dispersible latex powder,
3 parts of polycyclic aromatic sulfonate, namely,
0.7 part of sodium polyacrylate,
2.5 parts of a foaming agent,
52 parts of waste PET particles are added into the PET powder,
2 parts of a water-proofing agent,
and 115 parts of water.
The detection shows that the gypsum sound-absorbing layer slurry has high viscosity, the waste PET particles are not uniformly dispersed, the foam is not cracked, the heat conductivity coefficient of the sound-absorbing board is 0.32W/(m.K), and the noise reduction coefficient is 0.41.
Comparative example 3
The sound absorption board comprises a gypsum sound absorption layer and a sound absorption layer, wherein the gypsum sound absorption layer consists of the following raw materials in parts by weight:
320 parts of ordinary portland cement,
76 parts of ultra-fine micro-beads,
4 parts of re-dispersible latex powder,
3 parts of polycyclic aromatic sulfonate, namely,
0.7 part of sodium polyacrylate,
2.5 parts of a foaming agent,
52 parts of waste PET particles are added into the PET powder,
2 parts of a water-proofing agent,
and 115 parts of water.
Through detection, the fluidity of the gypsum sound absorption layer slurry is poor, waste PET particles are exposed, foam is broken, and the slurry collapses a mold.
Comparative example 4
The sound absorption board comprises a gypsum sound absorption layer and a sound absorption layer, wherein the gypsum sound absorption layer consists of the following raw materials in parts by weight:
300 parts of phosphogypsum, namely 300 parts of phosphogypsum,
56 parts of superfine micro-beads, namely,
40 parts of carbide slag, namely 40 parts of carbide slag,
4 parts of hydroxypropyl methyl cellulose, namely 4 parts of hydroxypropyl methyl cellulose,
3 parts of polycyclic aromatic sulfonate, namely,
0.7 part of sodium polyacrylate,
2.5 parts of a foaming agent,
52 parts of waste PET particles are added into the PET powder,
2 parts of a water-proofing agent,
and 115 parts of water.
The detection shows that the gypsum sound-absorbing layer slurry has poor cohesiveness, the waste PET particles float upwards, the heat conductivity coefficient of the sound-absorbing board is 0.36W/(m.K), and the noise reduction coefficient is 0.34.
Comparative example 5
The sound absorption board comprises a gypsum sound absorption layer and a sound absorption layer, wherein the gypsum sound absorption layer consists of the following raw materials in parts by weight:
300 parts of phosphogypsum, namely 300 parts of phosphogypsum,
56 parts of superfine micro-beads, namely,
40 parts of carbide slag, namely 40 parts of carbide slag,
4 parts of re-dispersible latex powder,
3.7 parts of a polycarboxylic acid water reducing agent,
2.5 parts of a foaming agent,
52 parts of waste PET particles are added into the PET powder,
2 parts of a water-proofing agent,
and 115 parts of water.
Through detection, the gypsum sound absorption layer slurry has poor cohesiveness, the waste PET particles float upwards, foams break, and the slurry collapses the mold.
Comparative example 6
The sound absorption board comprises a gypsum sound absorption layer and a sound absorption layer, wherein the gypsum sound absorption layer consists of the following raw materials in parts by weight:
350 parts of phosphogypsum, namely,
46 parts of mineral powder, namely, a mineral powder,
4 parts of re-dispersible latex powder,
3.7 parts of polycyclic aromatic sulfonate,
2.5 parts of a foaming agent,
52 parts of waste PET particles are added into the PET powder,
2 parts of a water-proofing agent,
and 115 parts of water.
Through detection, the fluidity of the gypsum sound absorption layer slurry is poor, waste PET particles are exposed, foam is broken, and the slurry collapses a mold.
Claims (9)
1. The sound-absorbing board is characterized by comprising a gypsum sound-absorbing layer, wherein the gypsum sound-absorbing layer is prepared from the following raw materials in parts by weight:
200 portions and 300 portions of ardealite,
50-80 parts of superfine micro-beads,
20-40 parts of carbide slag,
3-5 parts of re-dispersible latex powder,
2-4 parts of polycyclic aromatic sulfonate,
0.5 to 0.8 portion of sodium polyacrylate,
2-3 parts of a foaming agent,
40-60 parts of waste PET particles,
1-3 parts of a water-proofing agent,
90-120 parts of water, namely,
the particle size of the waste PET particles is 0.5-2 mm.
2. The sound-absorbing panel according to claim 1 wherein said ultra-fine microbeads are derived from ultra-fine particles collected from flue gases of thermal power plants, have a particle size of less than 5 μm, a water demand ratio of less than 90%, and a 28d activity index of greater than 105%.
3. The sound-absorbing panel according to claim 1 wherein the redispersible latex powder is ethylene-vinyl acetate rubber powder.
4. The sound-absorbing panel according to claim 1, wherein the foaming agent is at least one of a vegetable protein foaming agent and hydrogen peroxide.
5. The sound-absorbing panel as claimed in claim 1, wherein said water-repellent agent is calcium stearate.
6. The sound-absorbing panel of claim 1 further comprising a PET foam panel disposed on the outer side of the gypsum sound-absorbing layer.
7. The sound-absorbing panel as claimed in claim 6, wherein said gypsum sound-absorbing layer is provided in equal thickness to the PET foam panel.
8. The sound-absorbing panel according to claim 6 wherein said PET foam panel is embossed with surface sound-absorbing holes.
9. Use of the acoustic panel according to any one of claims 1 to 8 in the field of ceilings, partition panels, finishing panels.
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| CN102503336A (en) * | 2011-11-01 | 2012-06-20 | 赤壁人和建材有限公司 | Heat-insulation fireproof sound-absorbing ecological gypsum board made of composite materials |
| CN103058704B (en) * | 2012-12-26 | 2014-04-16 | 江苏中天消防设备有限公司 | Fire protection core plate and production method thereof |
| CN105777013B (en) * | 2016-03-29 | 2018-05-11 | 江苏特友诺新材料科技有限公司 | A kind of floor complex material heat preservation sound panel and preparation method thereof |
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