CN110981538A - Method for preparing sound insulation material based on waste foam concrete - Google Patents
Method for preparing sound insulation material based on waste foam concrete Download PDFInfo
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
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- C04B20/023—Chemical treatment
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- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
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- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
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- C04B30/00—Compositions for artificial stone, not containing binders
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0022—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors
- C04B38/0025—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors starting from inorganic materials only, e.g. metal foam; Lanxide type products
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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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
Abstract
The invention discloses a method for preparing a sound insulation material based on waste foam concrete, and belongs to the technical field of building materials. The waste foam concrete is used as a basic raw material, so that the full utilization of resources is realized, the sound insulation material can be well prepared, the waste foam mixed concrete is subjected to reactivation treatment by using a surfactant, the internal foam structure is improved, the iron content in the waste foam mixed concrete is increased by using an additive, the waste foam mixed concrete is deposited and then calcined, the internal foam structure is damaged, the pore structure is increased, meanwhile, a polymer is modified by using a mixed monomer, the water resistance is enhanced, and finally the waste foam concrete is mixed with an acid solution, so that formed ions are adsorbed on the particle surface under the action of the polymer, the sound blocking and sound insulation effects of pores are improved, a rich microporous structure is formed, and the sound insulation effect is improved. The invention solves the problems that the prior waste foam concrete can not be well utilized, the resource is wasted, and the prior sound insulation material has poor sound insulation effect.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a method for preparing a sound insulation material based on waste foam concrete.
Background
The foam concrete is a novel building material which is formed by uniformly mixing cement, lime, fly ash, aggregate, an additive, foam and the like and then pouring and hardening the mixture, contains a large number of closed air holes inside, has the advantages of good fluidity, light dead weight, less resource consumption, excellent heat insulation performance and the like, and has been recognized, valued and applied more and more widely in the building industry. Concrete foaming agents are one of the main influencing factors for the performance of foamed concrete.
The foam concrete is a porous concrete material, and the interior of the foam concrete material contains a large number of closed fine air holes. Compared with common concrete, the foam concrete has the advantages of light weight, good heat preservation and heat insulation performance, good sound insulation effect, strong earthquake resistance and the like, and is a novel environment-friendly and energy-saving building material. According to different preparation processes, the foam concrete can be divided into physical foaming and chemical foaming. The physical foaming is to utilize the surface activity of the foaming agent, generate foam through mechanical stirring and then add the foam into the slurry, or directly introduce the foam into the slurry by means of a foaming machine. Chemical foaming is to mix the foaming agent and the slurry evenly and then to generate gas through chemical reaction to form bubbles in situ. Compared with a physical foaming method, the chemical foaming method has the advantages of simple preparation process, no need of auxiliary equipment such as a foaming machine and the like, and preparation of the ultra-light volume-weight foam concrete. Therefore, chemically foamed concrete has great development potential.
The foaming cement is an inorganic heat-insulating material which is prepared by cement, a proper mineral admixture, an additive, a foaming agent and a foam stabilizer according to a certain proportion through a certain process and contains a large number of closed pores, the combustion grade of the foaming cement is A grade, the foaming cement has good heat-insulating and sound-insulating properties and fire-resistant and sound-insulating properties, the construction is convenient, building wastes, industrial waste materials and the like can be fully utilized, and the foaming cement is widely applied to occasions such as wall heat insulation, roof heat insulation, ground energy conservation and the like. However, the foamed cement inevitably generates a large amount of waste foamed cement due to various reasons such as cutting and dismantling in the production and use processes, the leftover materials generated by cutting or dismantled waste boards have different sizes and are difficult to directly utilize, and the current main treatment mode is stacking or landfill. Not only occupies a large amount of land, but also pollutes water sources, influences air quality, is not beneficial to sustainable development, and simultaneously is great waste of resources.
Sound insulation materialThe material is a material, a member or a structure which can block sound transmission or weaken transmitted sound energy, and is characterized by heavier mass and higher density, such as steel plates, lead plates, concrete walls, brick walls and the like. Typically used in offices or KTVs. The sound insulation material or the member has different sound insulation effects due to different use occasions and different test methods. For sound insulation materials, to reduce transmitted sound energy and block sound transmission, it is not as porous, loose and air permeable as sound absorption materials, but it should be heavy and dense, such as steel plate, lead plate, brick wall, etc. The sound insulation material is required to be compact and have no pores or gaps; has a large weight. Such sound-insulating materials have poor sound-absorbing properties because they are dense, difficult to absorb and transmit sound energy, and have strong reflection energy. The sound barrier material attenuates transmitted sound energy to incident sound energy 10-3~10-4The sound insulation quantity is expressed by a decibel measurement method for convenient expression.
However, the waste foam concrete in the current market cannot be well utilized, so that serious resource waste is caused, and the current sound insulation material has the problems of poor sound insulation effect, easy deformation and low compressive strength.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the invention provides a method for preparing a sound insulation material based on waste foam concrete, aiming at the problems that the waste foam concrete can not be well utilized, resources are wasted, and the sound insulation effect of the existing sound insulation material is poor.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for preparing a sound insulation material based on waste foam concrete comprises the following steps:
(1) crushing waste foam concrete, sieving, collecting sieved particles, performing ultrasonic oscillation on the sieved particles, water and a surfactant according to a mass ratio of 7-9: 12:1, standing, filtering, and collecting filter residues;
(2) mixing the filter residue and a hydrochloric acid solution according to the mass ratio of 2: 4-6, stirring at 70-75 ℃, adding an additive accounting for 6-8% of the mass of the filter residue, adjusting the pH value to 8.0-8.5, standing, filtering, collecting a filter cake, washing, drying, and collecting a dried substance;
(3) mixing the dried substance, the auxiliary agent and water according to the mass ratio of 9-13: 4: 4-6, collecting a mixture, putting the mixture into a calcining furnace for calcining, and collecting calcined particles;
(4) according to the weight parts, 130-160 parts of ethylene glycol, 40-50 parts of acrylamide, 30-35 parts of calcined particles, 10-15 parts of synergistic particles, 8-10 parts of mixed monomers, 4-6 parts of initiators, 1-3 parts of trace agents and 0.2-0.6 part of mixed additives are taken, firstly, the ethylene glycol, the acrylamide, the calcined particles, the synergistic particles and the mixed monomers are placed into a reactor, nitrogen is used for protection and preheating, the initiators, the trace agents and the mixed additives are added, the temperature is raised, stirring is carried out, discharging and spray drying is carried out, and spray-dried substances are collected;
(5) mixing the spray-dried product, the acid solution and the additive according to the mass ratio of 7: 15-19: 3, stirring, adjusting the pH value to be neutral, freeze-drying, and collecting the freeze-dried product to obtain the sound insulation material.
The surfactant in the step (1) is formed by mixing α -olefin sodium sulfonate and sodium dodecyl benzene sulfonate according to a mass ratio of 4: 1-3.
The additive in the step (2) is formed by mixing ferrous chloride and sodium acetate according to the mass ratio of 6: 3-5.
The auxiliary agent in the step (3) is formed by mixing sodium bicarbonate and ammonium bicarbonate according to the mass ratio of 6: 1-3.
In the step (4), the synergistic particles are any one of sodium carbonate and calcium carbonate.
The mixed monomer in the step (4) is formed by mixing any two of triethoxy-2-acryl silane, dimethyl diethoxy silane and methyl triethoxy silane according to any mass ratio.
The initiator in the step (4) is formed by mixing ammonium persulfate and di-tert-butyl peroxide according to a mass ratio of 10: 2-4.
And (4) the trace agent in the step (4) is tetrabutyl titanate.
And (3) mixing the magnesium chloride and the manganese nitrate as the mixed additive in the step (4) according to the mass ratio of 4-9: 2.
The acid solution in the step (5) is prepared by mixing hydrochloric acid and citric acid according to the mass ratio of 7-9: 1.
Compared with other methods, the method has the beneficial technical effects that:
the invention takes the waste foam concrete as the basic raw material, firstly, the resource is fully utilized, secondly, the sound insulation material can be well prepared, firstly, the waste foam mixed concrete is activated again by using the surfactant, the internal foam structure is improved, then, the calcium silicate, the aluminum oxide, the iron oxide and the like in the waste foam mixed concrete react with the hydrochloric acid, the iron content in the waste foam mixed concrete is increased by using the additive, the waste foam mixed concrete is deposited under the alkaline condition, then, the waste foam mixed concrete is calcined, the sediment in the waste foam mixed concrete forms magnetic particles, the silicon dioxide is deposited in the pores, the internal foam structure is destroyed, the pore structure is increased, the sediment in the waste foam mixed concrete reacts with the acrylamide and the like, the particles are wrapped by the acrylamide in the polymerization process, partial synergistic particles are embedded in the surface of the polymer, and meanwhile, the mixed monomer is used for modifying the polymer, the water resistance is enhanced, the water resistance is finally mixed with the acid solution, the synergistic particles are decomposed through mixing, pores are generated, formed ions are adsorbed on the surfaces of the particles under the action of the polymer, the sound blocking and sound insulation effects of the pores are improved, a rich microporous structure is formed inside, and the sound insulation effect is improved.
Detailed Description
The surfactant is formed by mixing α -olefin sodium sulfonate and sodium dodecyl benzene sulfonate according to a mass ratio of 4: 1-3.
The additive is formed by mixing ferrous chloride and sodium acetate according to the mass ratio of 6: 3-5.
The auxiliary agent is formed by mixing sodium bicarbonate and ammonium bicarbonate according to the mass ratio of 6: 1-3.
The synergistic particles are any one of sodium carbonate and calcium carbonate.
The mixed monomer is formed by mixing any two of triethoxy-2-propylene silane, dimethyl diethoxy silane and methyl triethoxy silane according to any mass ratio.
The initiator is formed by mixing ammonium persulfate and di-tert-butyl peroxide according to a mass ratio of 10: 2-4.
The trace agent is tetrabutyl titanate.
The mixed additive is formed by mixing magnesium chloride and manganese nitrate according to the mass ratio of 4-9: 2.
The acid solution is prepared by mixing 0.8mol/L hydrochloric acid and citric acid according to the mass ratio of 7-9: 1.
A method for preparing a sound insulation material based on waste foam concrete comprises the following steps:
(1) crushing waste foam concrete, sieving with a 100-mesh sieve, collecting sieved particles, performing ultrasonic oscillation on the sieved particles, water and a surfactant according to a mass ratio of 7-9: 12:1 for 15min, standing for 30min, filtering, and collecting filter residues;
(2) mixing the filter residue with 1.6mol/L hydrochloric acid solution according to the mass ratio of 2: 4-6, stirring for 2 hours at 70-75 ℃, adding an additive accounting for 6-8% of the mass of the filter residue, adjusting the pH to 8.0-8.5 by using sodium hydroxide solution, standing for 3-5 hours, filtering, collecting a filter cake, washing to be neutral, drying, and collecting a dried substance;
(3) mixing the dried substance, the auxiliary agent and water according to a mass ratio of 9-13: 4: 4-6, collecting a mixture, calcining the mixture in a calcining furnace at 900-1200 ℃ for 1-3 h, and collecting calcined particles;
(4) according to the weight parts, 130-160 parts of ethylene glycol, 40-50 parts of acrylamide, 30-35 parts of calcined particles, 10-15 parts of synergistic particles, 8-10 parts of mixed monomers, 4-6 parts of initiators, 1-3 parts of trace agents and 0.2-0.6 part of mixed additives are taken, firstly, the ethylene glycol, the acrylamide, the calcined particles, the synergistic particles and the mixed monomers are placed into a reactor, nitrogen is used for protection, the mixture is preheated for 50min at 40-50 ℃, the initiators, the trace agents and the mixed additives are added, the temperature is raised to 65-75 ℃, stirring is carried out for 5-9 h, discharging and spray drying are carried out, and spray-dried products are collected;
(5) mixing the spray-dried product, the acid solution and the additive according to the mass ratio of 7: 15-19: 3, stirring for 2 hours, adjusting the pH value to be neutral, freeze-drying, and collecting the freeze-dried product to obtain the sound insulation material.
Example 1
The surfactant is formed by mixing α -olefin sodium sulfonate and sodium dodecyl benzene sulfonate according to the mass ratio of 4: 1.
The additive is formed by mixing ferrous chloride and sodium acetate according to the mass ratio of 6: 3.
The auxiliary agent is formed by mixing sodium bicarbonate and ammonium bicarbonate according to the mass ratio of 6: 1.
The synergistic particles are sodium carbonate.
The mixed monomer is prepared by mixing triethoxy-2-propylene silane and dimethyl diethoxy silane according to any mass ratio.
The initiator is formed by mixing ammonium persulfate and di-tert-butyl peroxide according to the mass ratio of 10: 2.
The trace agent is tetrabutyl titanate.
The mixed additive is prepared by mixing magnesium chloride and manganese nitrate according to the mass ratio of 4: 2.
The acid solution is prepared by mixing 0.8mol/L hydrochloric acid and citric acid according to the mass ratio of 7: 1.
A method for preparing a sound insulation material based on waste foam concrete comprises the following steps:
(1) crushing waste foam concrete, sieving with a 100-mesh sieve, collecting sieved particles, ultrasonically oscillating the sieved particles, water and a surfactant according to a mass ratio of 7:12:1 for 15min, standing for 30min, filtering, and collecting filter residues;
(2) mixing the filter residue with 1.6mol/L hydrochloric acid solution according to the mass ratio of 2:4, stirring for 2h at 70 ℃, adding an additive with the mass of 6% of the filter residue, adjusting the pH to 8.0 by using sodium hydroxide solution, standing for 3h, filtering, collecting a filter cake, washing to be neutral, drying, and collecting a dried substance;
(3) mixing the dried substance, the auxiliary agent and water according to the mass ratio of 9:4:4, collecting a mixture, putting the mixture into a calcining furnace, calcining for 1h at 900 ℃, and collecting calcined particles;
(4) according to the weight parts, 130 parts of ethylene glycol, 40 parts of acrylamide, 30 parts of calcined particles, 10 parts of synergistic particles, 8 parts of mixed monomers, 4 parts of initiator, 1 part of trace agent and 0.2 part of mixed additive are taken, firstly, the ethylene glycol, the acrylamide, the calcined particles, the synergistic particles and the mixed monomers are put into a reactor, are preheated for 50min at 40 ℃ under the protection of nitrogen, are added with the initiator, the trace agent and the mixed additive, are heated to 65 ℃, are stirred for 5h, are discharged, are spray-dried and are collected;
(5) mixing the spray-dried product, the acid solution and the additive according to the mass ratio of 7:15:3, stirring for 2h, adjusting the pH value to be neutral, freeze-drying, and collecting the freeze-dried product to obtain the sound insulation material.
Example 2
The surfactant is formed by mixing α -olefin sodium sulfonate and sodium dodecyl benzene sulfonate according to the mass ratio of 4: 2.
The additive is formed by mixing ferrous chloride and sodium acetate according to the mass ratio of 6: 4.
The auxiliary agent is formed by mixing sodium bicarbonate and ammonium bicarbonate according to the mass ratio of 6: 2.
The synergistic particles are calcium carbonate.
The mixed monomer is prepared by mixing triethoxy-2-propylene silane and methyl triethoxy silane according to any mass ratio.
The initiator is formed by mixing ammonium persulfate and di-tert-butyl peroxide according to the mass ratio of 10: 3.
The trace agent is tetrabutyl titanate.
The mixed additive is prepared by mixing magnesium chloride and manganese nitrate according to the mass ratio of 7: 2.
The acid solution is prepared by mixing 0.8mol/L hydrochloric acid and citric acid according to the mass ratio of 8: 1.
A method for preparing a sound insulation material based on waste foam concrete comprises the following steps:
(1) crushing waste foam concrete, sieving with a 100-mesh sieve, collecting sieved particles, ultrasonically oscillating the sieved particles, water and a surfactant according to a mass ratio of 8:12:1 for 15min, standing for 30min, filtering, and collecting filter residues;
(2) mixing the filter residue with 1.6mol/L hydrochloric acid solution according to the mass ratio of 2:5, stirring for 2h at 72 ℃, adding an additive accounting for 7% of the mass of the filter residue, adjusting the pH to 8.3 by using sodium hydroxide solution, standing for 4h, filtering, collecting a filter cake, washing to be neutral, drying, and collecting a dried substance;
(3) mixing the dried substance, the auxiliary agent and water according to the mass ratio of 11:4:5, collecting a mixture, putting the mixture into a calcining furnace, calcining at 1050 ℃ for 2 hours, and collecting calcined particles;
(4) according to the weight parts, 145 parts of ethylene glycol, 45 parts of acrylamide, 32 parts of calcined particles, 12 parts of synergistic particles, 9 parts of mixed monomers, 5 parts of initiator, 2 parts of trace agent and 0.4 part of mixed additive are taken, firstly, the ethylene glycol, the acrylamide, the calcined particles, the synergistic particles and the mixed monomers are placed into a reactor, nitrogen is used for protection, preheating is carried out for 50min at 45 ℃, the initiator, the trace agent and the mixed additive are added, the temperature is raised to 70 ℃, stirring is carried out for 7h, discharging is carried out, spray drying is carried out, and spray-dried products are collected;
(5) mixing the spray-dried product, the acid solution and the additive according to the mass ratio of 7:17:3, stirring for 2h, adjusting the pH value to be neutral, freeze-drying, and collecting the freeze-dried product to obtain the sound insulation material.
Example 3
The surfactant is formed by mixing α -olefin sodium sulfonate and sodium dodecyl benzene sulfonate according to the mass ratio of 4: 3.
The additive is formed by mixing ferrous chloride and sodium acetate according to the mass ratio of 6: 5.
The auxiliary agent is formed by mixing sodium bicarbonate and ammonium bicarbonate according to the mass ratio of 6: 3.
The synergistic particles are sodium carbonate.
The mixed monomer is formed by mixing dimethyl diethoxy silane and methyl triethoxy silane according to any mass ratio.
The initiator is formed by mixing ammonium persulfate and di-tert-butyl peroxide according to the mass ratio of 10: 4.
The trace agent is tetrabutyl titanate.
The mixed additive is prepared by mixing magnesium chloride and manganese nitrate according to the mass ratio of 9: 2.
The acid solution is prepared by mixing 0.8mol/L hydrochloric acid and citric acid according to the mass ratio of 9: 1.
A method for preparing a sound insulation material based on waste foam concrete comprises the following steps:
(1) crushing waste foam concrete, sieving with a 100-mesh sieve, collecting sieved particles, ultrasonically oscillating the sieved particles, water and a surfactant according to a mass ratio of 9:12:1 for 15min, standing for 30min, filtering, and collecting filter residues;
(2) mixing the filter residue with 1.6mol/L hydrochloric acid solution according to the mass ratio of 2:6, stirring for 2h at 75 ℃, adding an additive accounting for 8% of the mass of the filter residue, adjusting the pH to 8.5 by using sodium hydroxide solution, standing for 5h, filtering, collecting a filter cake, washing to be neutral, drying, and collecting a dried substance;
(3) mixing the dried substance, the auxiliary agent and water according to the mass ratio of 13:4:6, collecting a mixture, putting the mixture into a calcining furnace, calcining for 3 hours at 1200 ℃, and collecting calcined particles;
(4) according to the weight parts, 160 parts of ethylene glycol, 50 parts of acrylamide, 35 parts of calcined particles, 15 parts of synergistic particles, 10 parts of mixed monomers, 6 parts of initiator, 3 parts of trace agent and 0.6 part of mixed additive are taken, firstly, the ethylene glycol, the acrylamide, the calcined particles, the synergistic particles and the mixed monomers are put into a reactor, are preheated for 50min at 50 ℃ under the protection of nitrogen, are added with the initiator, the trace agent and the mixed additive, are heated to 75 ℃, are stirred for 9h, are discharged, are spray-dried and are collected;
(5) mixing the spray-dried product, the acid solution and the additive according to the mass ratio of 7:19:3, stirring for 2h, adjusting the pH value to be neutral, freeze-drying, and collecting the freeze-dried product to obtain the sound insulation material.
Comparative example 1: essentially the same procedure as in example 1, except that the mixed monomers were absent.
Comparative example 2:
the surfactant is formed by mixing α -olefin sodium sulfonate and sodium dodecyl benzene sulfonate according to the mass ratio of 4: 2.
The additive is formed by mixing ferrous chloride and sodium acetate according to the mass ratio of 6: 4.
The auxiliary agent is formed by mixing sodium bicarbonate and ammonium bicarbonate according to the mass ratio of 6: 2.
A method for preparing a sound insulation material based on waste foam concrete comprises the following steps:
(1) crushing waste foam concrete, sieving with a 100-mesh sieve, collecting sieved particles, ultrasonically oscillating the sieved particles, water and a surfactant according to a mass ratio of 8:12:1 for 15min, standing for 30min, filtering, and collecting filter residues;
(2) mixing the filter residue with 1.6mol/L hydrochloric acid solution according to the mass ratio of 2:5, stirring for 2h at 72 ℃, adding an additive accounting for 7% of the mass of the filter residue, adjusting the pH to 8.3 by using sodium hydroxide solution, standing for 4h, filtering, collecting a filter cake, washing to be neutral, drying, and collecting a dried substance;
(3) mixing the dried substance, the auxiliary agent and water according to the mass ratio of 11:4:5, collecting the mixture, putting the mixture into a calcining furnace, calcining at 1050 ℃ for 2h, and collecting calcined particles.
Comparative example 3: commercially available sound insulation materials. (main ingredients: activated industrial slag powder, porcelain clay, volcanic ash, alumina, calcium chloride, calcium sulfate, graphite, glass fiber)
The products of examples 1 to 3 and comparative examples 1 to 2 were placed in a mold and extruded in an extruder to produce a sound-insulating sheet having a thickness of 2 cm. The resulting sound-insulating material was then tested according to GB/T19899.3-2005 and GB/T50121-2005, the test results are shown in Table 1:
table 1:
| test items | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Sound insulation amount/dB | 75 | 73 | 70 | 65 | 61 | 55 |
| Tensile strength/MPa | 75.3 | 73.6 | 69.2 | 60.4 | 55.9 | 55.3 |
| Coefficient of thermal conductivity w/m.k | 0.062 | 0.056 | 0.055 | 0.068 | 0.078 | 0.076 |
In sum, the sound insulation material obtained by the invention has good sound insulation effect and high compressive strength. Compared with the products sold on the market, the product has better effect and is worth popularizing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is to be construed in all aspects and as broadly as possible, and all changes, equivalents and modifications that fall within the true spirit and scope of the invention are therefore intended to be embraced therein.
Claims (10)
1. A method for preparing a sound insulation material based on waste foam concrete is characterized by comprising the following steps:
(1) crushing waste foam concrete, sieving, collecting sieved particles, performing ultrasonic oscillation on the sieved particles, water and a surfactant according to a mass ratio of 7-9: 12:1, standing, filtering, and collecting filter residues;
(2) mixing the filter residue and a hydrochloric acid solution according to the mass ratio of 2: 4-6, stirring at 70-75 ℃, adding an additive accounting for 6-8% of the mass of the filter residue, adjusting the pH value to 8.0-8.5, standing, filtering, collecting a filter cake, washing, drying, and collecting a dried substance;
(3) mixing the dried substance, the auxiliary agent and water according to the mass ratio of 9-13: 4: 4-6, collecting a mixture, putting the mixture into a calcining furnace for calcining, and collecting calcined particles;
(4) according to the weight parts, 130-160 parts of ethylene glycol, 40-50 parts of acrylamide, 30-35 parts of calcined particles, 10-15 parts of synergistic particles, 8-10 parts of mixed monomers, 4-6 parts of initiators, 1-3 parts of trace agents and 0.2-0.6 part of mixed additives are taken, firstly, the ethylene glycol, the acrylamide, the calcined particles, the synergistic particles and the mixed monomers are placed into a reactor, nitrogen is used for protection and preheating, the initiators, the trace agents and the mixed additives are added, the temperature is raised, stirring is carried out, discharging and spray drying is carried out, and spray-dried substances are collected;
(5) mixing the spray-dried product, the acid solution and the additive according to the mass ratio of 7: 15-19: 3, stirring, adjusting the pH value to be neutral, freeze-drying, and collecting the freeze-dried product to obtain the sound insulation material.
2. The method for preparing the sound insulation material based on the waste foam concrete as claimed in claim 1, wherein the surfactant in the step (1) is α -olefin sodium sulfonate and sodium dodecyl benzene sulfonate which are mixed according to a mass ratio of 4: 1-3.
3. The method for preparing the sound insulation material based on the waste foamed concrete according to claim 1, wherein the additive in the step (2) is formed by mixing ferrous chloride and sodium acetate according to a mass ratio of 6: 3-5.
4. The method for preparing a sound insulation material based on the waste foamed concrete according to claim 1, wherein the auxiliary agent in the step (3) is sodium bicarbonate and ammonium bicarbonate which are mixed according to a mass ratio of 6: 1-3.
5. The method for preparing a soundproof material based on the waste foamed concrete according to claim 1, wherein the synergistic particles in the step (4) are any one of sodium carbonate and calcium carbonate.
6. The method for preparing a soundproof material based on the waste foam concrete according to claim 1, wherein the mixed monomer in the step (4) is any two of triethoxy-2-acryl silane, dimethyl diethoxy silane, and methyl triethoxy silane, which are mixed in any mass ratio.
7. The method for preparing the sound insulation material based on the waste foam concrete according to claim 1, wherein the initiator in the step (4) is a mixture of ammonium persulfate and di-tert-butyl peroxide in a mass ratio of 10: 2-4.
8. The method for preparing a soundproof material based on the waste foamed concrete according to claim 1, wherein the trace agent in the step (4) is tetrabutyl titanate.
9. The method for preparing a sound insulation material based on waste foam concrete according to claim 1, wherein in the step (4), the mixing additive is magnesium chloride and manganese nitrate which are mixed according to a mass ratio of 4-9: 2.
10. The method for preparing a sound insulation material based on waste foamed concrete according to claim 1, wherein the acid solution in the step (5) is prepared by mixing hydrochloric acid and citric acid according to a mass ratio of 7-9: 1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112010660A (en) * | 2020-08-28 | 2020-12-01 | 江苏苏嘉集团新材料有限公司 | Improved high-viscosity refractory material and processing method thereof |
| CN112500025A (en) * | 2021-01-12 | 2021-03-16 | 沈丽萍 | Preparation method of additive for high-performance foam concrete |
-
2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112010660A (en) * | 2020-08-28 | 2020-12-01 | 江苏苏嘉集团新材料有限公司 | Improved high-viscosity refractory material and processing method thereof |
| CN112500025A (en) * | 2021-01-12 | 2021-03-16 | 沈丽萍 | Preparation method of additive for high-performance foam concrete |
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