CN114591038B - Cement powder and preparation method thereof - Google Patents
Cement powder and preparation method thereof Download PDFInfo
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- CN114591038B CN114591038B CN202210406721.7A CN202210406721A CN114591038B CN 114591038 B CN114591038 B CN 114591038B CN 202210406721 A CN202210406721 A CN 202210406721A CN 114591038 B CN114591038 B CN 114591038B
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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
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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
- C04B2111/20—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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- 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
- C04B2111/40—Porous or lightweight materials
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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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- 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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Powder Metallurgy (AREA)
Abstract
The application relates to the field of building materials, in particular to a cement powder and a preparation method thereof. The cement powder comprises the following raw materials in parts by weight: 50-80 parts of cement clinker; 5-10 parts of noise reduction materials; the noise reduction material comprises a noise reduction body, and the noise reduction body comprises aluminum, a foaming agent, polypropylene powder and polyester sound absorption cotton powder; 4-10 parts of a bonding material; the binding material comprises phthalate coupling agent JTW-133 and isopropyl tristearate; the preparation method comprises the following steps: s1, primary mixing: mixing the noise reduction material and the combination material according to a formula to obtain a primary mixed material; s2, blending: and mixing the primary mixed material and the cement clinker to obtain cement powder. The cement powder material has the effect of reducing noise and bringing adverse effects to residents.
Description
Technical Field
The application relates to the field of building materials, in particular to cement powder and a preparation method thereof.
Background
The cement is a powdery hydraulic inorganic cementing material, is added with water and stirred into slurry, can be hardened in air or water, can firmly cement materials such as sand, stone and the like, and is widely applied to civil construction, water conservancy and other projects.
The noise comprises traffic noise, industrial noise and building noise, and the noise can bring great influence to residents and influence the rest and life of the residents. In the related art, in order to reduce the influence of noise on rest and life of residents, a sound insulation layer is usually added into a building wall to achieve the purpose, but the sound insulation layer has the problems of complex construction, high cost and low durability.
Disclosure of Invention
In order to reduce the adverse effect of noise on residents, the application provides cement powder and a preparation method thereof.
In a first aspect, the present application provides a cement powder, which adopts the following technical scheme:
the cement powder comprises the following raw materials in parts by weight:
50-80 parts of cement clinker;
5-10 parts of noise reduction materials; the noise reduction material comprises a noise reduction body, wherein the noise reduction body comprises aluminum, a foaming agent, polypropylene powder and polyester sound absorption cotton powder;
4-10 parts of a bonding material; the binding material comprises phthalate coupling agent JTW-133 and isopropyl tristearate titanate.
By adopting the technical scheme, the aluminum forms the aluminum with the pore structure under the action of the foaming agent, and sound waves enter the pore structure and then are reflected for many times to convert sound energy into heat energy, so that the effect of noise reduction is achieved. The polypropylene powder and the polyester sound-absorbing cotton powder are filled in the pore structure of aluminum, the polypropylene powder has a sound insulation effect, and the polyester sound-absorbing cotton powder has a sound absorption effect, so that the noise reduction effect can be further enhanced.
In addition, the cement clinker contains calcium oxide, after the cement powder is mixed with water, the calcium oxide reacts with the water to generate calcium hydroxide, the surface of the aluminum can react with the calcium hydroxide in the water to generate calcium metaaluminate which is insoluble in the water, and then the calcium metaaluminate is wrapped on the surface of the aluminum, so that the polypropylene powder and the polyester sound-absorbing cotton powder which are positioned in the pore structure of the aluminum are not easy to burn, and the flame retardant property of the cement powder is improved.
Preferably, the preparation method of the noise reduction body comprises the following steps:
(1) Taking 10-15 parts of two aluminum plates, 1-3 parts of foaming agent, 2-6 parts of polypropylene powder and 3-6 parts of polyester sound-absorbing cotton powder in total by weight;
(2) Mixing and stirring a foaming agent, polypropylene powder and polyester sound-absorbing cotton powder to obtain a mixture;
(3) Spreading the mixture between two aluminum plates, allowing the two aluminum plates to be subjected to multi-pass friction stirring, allowing the aluminum plates to foam to form a pore structure under the action of a foaming agent in the mixture, and allowing the polypropylene powder and the polyester sound-absorbing cotton powder in the mixture to be distributed in pores of the aluminum plates to obtain composite aluminum;
(4) And crushing the composite aluminum into particles by a crusher to obtain the noise reduction body.
By adopting the technical scheme, the honeycomb aluminum can be formed, has more excellent sound insulation and noise reduction performance, is light in weight and high in structural strength, and contributes to improving the processability and the service life of cement. By the method, the polypropylene powder and the polyester sound-absorbing cotton powder can be uniformly distributed in the pore structure of the aluminum, so that the noise reduction performance of the cement is further improved.
Preferably, the polypropylene powder and the polyester sound-absorbing cotton powder are modified polypropylene powder and modified polyester sound-absorbing cotton powder, and the modification treatment comprises the following steps: and (3) soaking the polypropylene powder and the polyester sound-absorbing cotton powder in tetrakis (hydroxymethyl) phosphonium chloride, filtering, taking filter residues and drying to obtain the modified polypropylene powder and the modified polyester sound-absorbing cotton powder.
By adopting the technical scheme, the tetramethylolphosphonium chloride can carry out flame-retardant modification on the polypropylene powder and the polyester sound-absorbing cotton powder, so that the flame retardant property of the polypropylene powder and the polyester sound-absorbing cotton powder is improved, and the flame retardant property of cement is further improved.
Preferably, the noise reduction material further comprises a flame retardant body, and the flame retardant body is coated outside the noise reduction body to form the noise reduction material with a core-shell structure.
By adopting the technical scheme, the flame-retardant body is coated outside the noise reduction body, so that the flame-retardant property of the noise reduction material is further improved.
Preferably, the flame retardant body comprises magnesium hydroxide and aluminum hydroxide, and the preparation method of the noise reduction material comprises the following steps:
(1) Taking 4-6 parts of aluminum chloride, 4-6 parts of magnesium chloride, 2-4 parts of noise reduction body and 6-9 parts of sodium hydroxide solution by weight;
(2) Mixing and stirring aluminum chloride, magnesium chloride and a noise reducer to obtain a mixed solution;
(3) And mixing and stirring the mixed solution and a sodium hydroxide solution, filtering, taking filter residues, washing, drying and grinding to obtain the noise reduction material.
By adopting the technical scheme, the magnesium hydroxide and the aluminum hydroxide can be coated outside the noise reduction body to form the noise reduction material with a nuclear structure. Wherein, magnesium hydroxide and aluminum hydroxide are compounded to be used as a flame retardant body, and the flame retardant property of the cement is synergistically improved.
Preferably, the particle size of the noise reduction body is 2-6mm.
Through adopting above-mentioned technical scheme, can make honeycomb aluminium have certain volume, and then make honeycomb aluminium's pore structure more complete, and help improving honeycomb aluminium's structural strength, and then improve the performance and the structural strength of making an uproar of falling of cement.
Preferably, the binding material further comprises sodium methylenedinaphthalene sulfonate, and the mass ratio of the phthalate coupling agent JTW-133, isopropyl tristearate titanate and the sodium methylenedinaphthalene sulfonate is (3-6): (2-7): (4-8).
By adopting the technical scheme, the methylene bis-naphthalene sodium sulfonate has good permeability and is easy to permeate into the pore structure of aluminum, so that the polypropylene powder and the polyester sound-absorbing cotton powder form good combination in the pore structure of aluminum, and the noise reduction performance of cement is further improved.
In a second aspect, the present application provides a method for preparing cement powder, which adopts the following technical scheme:
a preparation method of cement powder comprises the following steps:
s1, primary mixing: mixing the noise reduction material and the bonding material according to a formula to obtain a primary mixed material;
s2, blending: and mixing the primary mixed material and the cement clinker to obtain cement powder.
By adopting the technical scheme, the noise reduction material and the bonding material with small parts are uniformly mixed through the step S1 to obtain a primary mixed material, and then the uniformly mixed cement powder is prepared through the step S2.
In summary, the present application has the following beneficial effects:
1. the aluminum of the application forms aluminum with a pore structure under the action of the foaming agent, so that the effect of noise reduction is achieved; the polypropylene powder and the polyester sound-absorbing cotton powder are filled in the pore structure of the aluminum, the polypropylene powder has a sound insulation effect, and the polyester sound-absorbing cotton powder has a sound absorption effect, so that the noise reduction effect can be further enhanced; in addition, the cement clinker contains calcium oxide, after the cement powder is mixed with water, the calcium oxide reacts with the water to generate calcium hydroxide, the surface of the aluminum can react with the calcium hydroxide in the water to generate calcium metaaluminate which is insoluble in the water, and then the calcium metaaluminate is wrapped on the surface of the aluminum, so that the polypropylene powder and the polyester sound-absorbing cotton powder which are positioned in the pore structure of the aluminum are not easy to burn, and the flame retardant property of the cement powder is improved.
2. The preparation method of the noise reduction body preferably adopted in the application can form honeycomb aluminum, the honeycomb aluminum has more excellent sound insulation and noise reduction performance, the honeycomb aluminum is light in weight and high in structural strength, and the processing performance and the service life of cement are improved; by the method, the polypropylene powder and the polyester sound-absorbing cotton powder can be uniformly distributed in the pore structure of the aluminum, so that the noise reduction performance of the cement is further improved.
3. According to the application, the sound-absorbing polypropylene powder and the sound-absorbing polyester cotton powder are modified preferably by adopting the tetramethylolphosphonium chloride, and the noise-reducing material with the core-shell structure is formed outside the noise-reducing body in a cladding manner through the flame-retardant body, so that the flame retardant property of the sound-absorbing polypropylene powder and the sound-absorbing polyester cotton powder can be improved, and the flame retardant property of cement is further improved.
Detailed Description
The present application will be described in further detail with reference to examples.
In the examples of the present application, the drugs used are shown in table 1:
table 1 pharmaceutical products according to embodiments of the present application
Preparation example of noise reducing body
Preparation example 1: the noise reducer of the preparation example is prepared by the following method:
(1) Taking 4kg of polyester sound-absorbing cotton, crushing by a crusher, and sieving by a 1mm sieve to obtain polyester sound-absorbing cotton powder; taking 10kg of two aluminum plates, 1kg of foaming agent, 2kg of polypropylene powder and 3kg of polyester sound-absorbing cotton powder;
(2) Mixing and stirring a foaming agent, polypropylene powder and polyester sound-absorbing cotton powder to obtain a mixture;
(3) Spreading the mixture between two aluminum plates, performing multi-pass friction stirring on the two aluminum plates through a friction stirrer, foaming the aluminum plates to form a pore structure under the action of a foaming agent in the mixture, and distributing the polypropylene powder and the polyester sound-absorbing cotton powder in the mixture into pores of the aluminum plates to obtain composite aluminum;
(4) Crushing the composite aluminum into particles by a crusher, and taking the powdery composite aluminum which passes through a 6mm sieve and does not pass through 2mm to obtain the noise reduction body.
Preparation example 2: the noise reducer of the preparation example is prepared by the following method:
(1) Taking 4kg of polyester sound-absorbing cotton, crushing by a crusher, and sieving by a 1mm sieve to obtain polyester sound-absorbing cotton powder; taking two aluminum plates of 12.5kg in total, 2kg of foaming agent, 4kg of polypropylene powder and 4.5kg of polyester sound-absorbing cotton powder;
(2) Mixing and stirring a foaming agent, polypropylene powder and polyester sound-absorbing cotton powder to obtain a mixture;
(3) Spreading the mixture between two aluminum plates, performing multi-pass friction stirring on the two aluminum plates through a friction stirrer, foaming the aluminum plates to form a pore structure under the action of a foaming agent in the mixture, and distributing the polypropylene powder and the polyester sound-absorbing cotton powder in the mixture into pores of the aluminum plates to obtain composite aluminum;
(4) Crushing the composite aluminum into particles by a crusher, and taking the powdery composite aluminum which passes through a 6mm sieve and does not pass through 2mm to obtain the noise reduction body.
Preparation example 3: the noise reducer of the preparation example is prepared by the following method:
(1) Taking 4kg of polyester sound-absorbing cotton, crushing by a crusher, and sieving by a 1mm sieve to obtain polyester sound-absorbing cotton powder; taking 15kg of two aluminum plates, 3kg of foaming agent, 6kg of polypropylene powder and 6kg of polyester sound-absorbing cotton powder;
(2) Mixing and stirring a foaming agent, polypropylene powder and polyester sound-absorbing cotton powder to obtain a mixture;
(3) Spreading the mixture between two aluminum plates, performing multi-pass friction stirring on the two aluminum plates through a friction stirrer, foaming the aluminum plates to form a pore structure under the action of a foaming agent in the mixture, and distributing the polypropylene powder and the polyester sound-absorbing cotton powder in the mixture into pores of the aluminum plates to obtain composite aluminum;
(4) Crushing the composite aluminum into particles by a crusher, and taking the powdery composite aluminum which passes through a 6mm sieve and does not pass through 2mm to obtain the noise reduction body.
Preparation example 4
The difference between the preparation example and the preparation example 2 is that the step (4) of the preparation example is as follows: and crushing the composite aluminum into particles by a crusher, and taking the powdery composite aluminum which does not pass through a 6mm sieve to obtain the noise reduction body.
Preparation example 5
The difference between the preparation example and the preparation example 2 is that the step (4) of the preparation example is as follows: and crushing the composite aluminum into particles by a crusher, and taking the powdery composite aluminum which passes through a 2mm sieve to obtain the noise reduction body.
Preparation example 6
(1) Taking 12.5kg of aluminum powder, 2-6kg of polypropylene powder, 2kg of foaming agent and 3-6kg of polyester sound-absorbing cotton powder;
(2) Mixing aluminum powder and a foaming agent to obtain a primary mixed material; and adding polypropylene powder and polyester sound-absorbing cotton powder into the mixed material, mixing and stirring, crushing into granules by a crusher, and taking powder which passes through a 6mm sieve and does not pass through 2mm to obtain the noise reduction body.
Preparation example 7
The difference between the preparation example and the preparation example 2 is that the polypropylene powder and the polyester sound absorption cotton powder of the preparation example are modified polypropylene powder and modified polyester sound absorption cotton powder.
The modification treatment comprises the following steps: and respectively soaking 5kg of polypropylene powder and 5kg of polyester sound-absorbing cotton powder in two 20kg portions of tetrakis (hydroxymethyl) phosphonium chloride for 4 hours, filtering, respectively taking filter residues, and naturally drying to obtain modified polypropylene powder and modified polyester sound-absorbing cotton powder.
Preparation example of noise reducing Material
Preparation examples 8 to 14
Preparation examples 8 to 14 were prepared by sequentially using the noise reducing bodies of preparation examples 1 to 7 as noise reducing materials, as shown in table 2 below:
TABLE 2 noise-reducing materials of preparation examples 8 to 14
Preparation example 15
The difference between the preparation example and the preparation example 14 is that the noise reduction material of the preparation example comprises a noise reduction body and a flame retardant body, the noise reduction body is the noise reduction body of the preparation example 7, the flame retardant body comprises magnesium hydroxide and aluminum hydroxide, and the flame retardant body is coated outside the noise reduction body to form the noise reduction material of a core-shell structure, and the preparation method of the noise reduction material of the preparation example comprises the following steps:
(1) Taking 4kg of aluminum chloride, 4kg of magnesium chloride, 2kg of noise reduction body and 6kg of sodium hydroxide solution with the mass fraction of 20%;
(2) Mixing and stirring aluminum chloride, magnesium chloride and the noise reduction body in the preparation example 7 to obtain a mixed solution;
(3) And adding sodium hydroxide into the mixed solution, mixing and stirring, filtering, taking filter residues, washing with water for 3 times, naturally drying, and grinding to obtain the noise reduction material.
Preparation examples 16 to 17
The difference between the preparation examples 16 to 17 and the preparation example 15 is that the quality of the aluminum chloride, the magnesium chloride, the noise reducing body and the sodium hydroxide solution in the step (1) is different, and the quality is specifically as follows:
preparation example 16: taking 5kg of aluminum chloride, 5kg of magnesium chloride, 3kg of noise reduction body and 7.5kg of sodium hydroxide solution with the mass fraction of 20%;
preparation example 17: 6kg of aluminum chloride, 6kg of magnesium chloride, 4kg of noise reduction body and 9kg of sodium hydroxide solution with the mass fraction of 20 percent are taken.
Preparation example 18: the noise reduction material of the preparation example is prepared by the following method:
the noise reduction material of the preparation example is a common mixture of a flame retardant body and a noise reduction body: 5kg of magnesium hydroxide, 5kg of aluminum hydroxide and 3kg of noise reduction body are mixed and stirred to obtain the noise reduction material.
Performance test
Detection method
Flame retardant property: the test of preparation 9 and 14 to 18 was carried out by using a JF-3 type oxygen index tester in accordance with the GB/T2406-1993 standard.
TABLE 3 polar oxygen index of preparations 9 and 14 to 18
When the preparation example 9 and the preparation example 14 are compared, the difference between the preparation example 14 and the preparation example 9 is that in the noise reduction material of the preparation example 14, the polypropylene powder and the polyester sound absorption cotton powder are polypropylene powder and polyester sound absorption cotton powder which are modified by tetrakis hydroxymethyl phosphonium chloride, and the oxygen exponent of the preparation example 14 is larger than that of the preparation example 9, so that the flame retardant performance of the preparation example 14 is better than that of the preparation example 9. The flame retardant property of the polypropylene powder and the polyester sound-absorbing cotton powder is improved through the modification treatment of the tetrakis hydroxymethyl phosphonium chloride, so that the flame retardant property of the noise reduction material is improved.
Comparing the preparation examples 15 to 17 with the preparation example 9, the difference between the preparation examples 15 to 17 and the preparation example 9 is that the noise reduction material of the preparation examples 15 to 17 comprises a noise reduction body and a flame retardant body, and the flame retardant body is coated outside the noise reduction body to form the noise reduction material of the core-shell structure. Since the extreme oxygen indexes of preparation examples 15 to 17 were greater than that of preparation example 9, the flame retardant properties of preparation examples 14 to 15 were superior to those of preparation example 9. The addition of the flame retardant is illustrated, and the flame retardant property of the noise reduction material is improved. In production examples 15 to 17, the maximum value of the polar oxygen index of production example 16 was obtained, and production examples 15 to 17 were different in the ratio of the raw materials in step (1), indicating that the ratio of the raw materials in step (1) of production example 16 was optimum.
The preparation example 18 is compared with the preparation example 16, and the difference between the preparation example 18 and the preparation example 16 is that the preparation example 18 is a noise reduction material formed by commonly mixing a flame retardant body and a noise reduction body, and the preparation example 16 is a noise reduction material of a core-shell structure formed by coating the flame retardant body outside the noise reduction body. Because the extreme oxygen index of the preparation example 16 is greater than that of the preparation example 18, the flame retardant property of the preparation example 16 is superior to that of the preparation example 18, which shows that the noise reduction material with the core-shell structure is more excellent.
Preparation example of bonding Material
Preparation example 19
3kg of phthalate coupling agent JTW-133 and 2kg of isopropyl tristearate are mixed and stirred to obtain the binding material.
Preparation example 20
The difference between the preparation example and the preparation example 19 is that the binding material of the preparation example also comprises methylene dinaphthalene sodium sulfonate, and the preparation method comprises the following steps:
3kg of phthalate coupling agent JTW-133, 2kg of isopropyl tristearate and 4kg of methylene bis-naphthalene sodium sulfonate are mixed and stirred to obtain the binding material.
The difference between the preparation examples 21 to 22 and the preparation example 20 is that the mass ratio of the phthalate coupling agent JTW-133, isopropyl tristearate titanate and sodium methylenedinaphthalene sulfonate is different, and the specific ratio is as follows:
preparation example 21:4.5kg of phthalate coupling agent JTW-133, 4.5kg of isopropyl tristearate titanate and 6kg of methylene dinaphthalene sodium sulfonate;
preparation example 22:6kg of phthalate coupling agent JTW-133, 7kg of isopropyl tristearate titanate and 8kg of methylene dinaphthalene sodium sulfonate.
Examples
Example 1
This example contains the following raw materials:
50kg of cement clinker, 5kg of noise reducing material of preparation example 13 and 4kg of bonding material of preparation example 19.
The preparation method of the embodiment comprises the following steps:
s1, primary mixing: mixing the noise reduction material and the bonding material according to a formula to obtain a primary mixed material;
s2, blending: and mixing the primary mixed material and the cement clinker to obtain cement powder.
Example 2
The difference between the present embodiment and embodiment 1 lies in the different mixture ratio of the raw materials, which is specifically as follows:
65kg of cement clinker, 7.5kg of noise reduction material of production example 13 and 7kg of bonding material of production example 19.
Example 3
The difference between the present embodiment and embodiment 1 lies in the different mixture ratio of the raw materials, which is specifically as follows:
80kg of cement clinker, 10kg of noise reduction material of production example 13 and 10kg of bonding material of production example 19.
Examples 4 to 16
Examples 4-16 differ from example 2 in the selection of noise reducing materials and bonding materials, as shown in table 4 below:
table 4 selection of noise reducing materials and bonding materials in examples 4-16
Comparative example
Comparative example 1
This comparative example differs from example 2 in that no aluminum and no blowing agent were added to the noise reducer of this comparative example.
Comparative example 2
This comparative example differs from example 2 in that the binder material of this comparative example only contains the phthalate coupling agent JTW-133.
Performance test
Detection method
Compressive strength: mixing 50kg of the cement powder in each embodiment with 2kg of water and stirring to obtain a mixture; and (3) testing the compressive strength of the mixture according to the standard 'test method for basic performance of building mortar' JGJ/70-2009.
Sound insulation performance: referring to GB/T19889.3-2005, AWA6290M dual-channel acoustic analyzer is adopted, and a reverberation chamber-noise elimination method is adopted for detection.
TABLE 5 Performance test Table
Examples 1 to 3 were compared, and examples 1 to 3 were different in the ratio of raw materials in the cement powder, and the best ratio of raw materials was shown in example 2 because the compression strength and the sound insulation of example 2 were the greatest.
Examples 4 to 6 were compared, and examples 4 to 6 were different in the ratio of raw materials for the noise reducing material to prepare the noise reducing body, and the best ratio of raw materials was found in the noise reducing body of example 5 because the compression strength and the sound insulation of example 5 were the greatest.
Comparing examples 7-8 with example 5, examples 7-8 are different from example 5 in that example 5 preferably uses a noise reducing body with a particle size of 2-6mm, and because the compression strength and the sound insulation of example 5 are increased, it is shown that the particle size of the noise reducing body of 2-6mm can make the honeycomb aluminum have a certain volume, so that the pore structure of the honeycomb aluminum is more complete, and the structural strength of the honeycomb aluminum is improved, so that the noise reducing performance and the structural strength of the cement are improved.
Comparing example 9 with example 5, example 9 is different from example 5 in that the polypropylene powder and the polyester sound-absorbing cotton powder in example 9 are modified polypropylene powder and modified polyester sound-absorbing cotton powder, and the polar oxygen index of the noise reduction material in example 9 is greater than that of example 5, so that the flame retardant performance of example 9 is due to the flame retardant performance of example 5, which shows that the modified polypropylene powder and the modified polyester sound-absorbing cotton powder improve the flame retardant performance of cement powder.
Comparing examples 10 to 12 with example 9, examples 12 to 13 are different from example 5 in that the flame retardant is added in examples 10 to 12 to cover the noise reduction body to form the noise reduction material with the core-shell structure, and since the oxygen index of the noise reduction material in examples 10 to 12 is greater than that of example 9, the flame retardant performance of examples 10 to 12 is due to the flame retardant performance of example 5, which indicates that the flame retardant is added to cover the noise reduction body to form the noise reduction material with the core-shell structure, and the flame retardant performance of the cement powder is improved. In examples 10 to 12, the proportions of the raw materials for preparing the noise reducing material were different, and the flame retardant performance of example 11 was the best because the extreme oxygen index of the noise reducing material of example 11 was the largest.
Comparing example 13 with example 11, example 13 is different from example 11 in that the noise reduction material of example 13 is obtained by mixing the noise reduction body and the flame retardant body, and the maximum oxygen index of the noise reduction material of example 11 is higher, so that the flame retardant property of example 11 is better, which shows that the noise reduction material of the core-shell structure improves the flame retardant property of the cement powder.
Comparing examples 14-16 with example 11, examples 14-16 differ from example 11 in that the bonding material of examples 14-16 further includes sodium methylene bis naphthalene sulfonate, and since the compressive strength and the sound insulation of examples 14-16 are greater than those of example 11, the sodium methylene bis naphthalene sulfonate has good permeability and is easy to permeate into the pore structure of aluminum, so that the polypropylene powder and the polyester sound-absorbing cotton powder form good bonding in the pore structure of aluminum, thereby contributing to further improving the noise reduction performance of cement and increasing the compressive strength of cement. The difference between examples 14 and 16 is that the formulation ratio of the phthalate coupling agent JTW-133, isopropyl tristearate titanate and sodium methylenedinaphthalenesulfonate is different, and the formulation ratio of the phthalate coupling agent JTW-133, isopropyl tristearate titanate and sodium methylenedinaphthalenesulfonate is the best in example 15 because of the maximum compression strength and sound insulation of example 15.
Finally, comparing comparative examples 1-2 with example 2, the embodiment of the present application is better demonstrated because example 2 has a greater compressive strength and sound insulation than comparative examples 1-2.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (5)
1. The cement powder is characterized by comprising the following raw materials in parts by weight:
50-80 parts of cement clinker;
5-10 parts of noise reduction materials; the noise reduction material comprises a noise reduction body, wherein the noise reduction body comprises aluminum, a foaming agent, polypropylene powder and polyester sound absorption cotton powder;
4-10 parts of a bonding material; the binding material comprises phthalate coupling agent JTW-133 and isopropyl tristearate titanate;
the preparation method of the noise reduction body comprises the following steps:
(1) Taking 10-15 parts of two aluminum plates, 1-3 parts of foaming agent, 2-6 parts of polypropylene powder and 3-6 parts of polyester sound-absorbing cotton powder in total by weight;
(2) Mixing and stirring a foaming agent, polypropylene powder and polyester sound-absorbing cotton powder to obtain a mixture;
(3) Spreading the mixture between two aluminum plates, allowing the two aluminum plates to be subjected to multi-pass friction stirring, allowing the aluminum plates to foam to form a pore structure under the action of a foaming agent in the mixture, and allowing the polypropylene powder and the polyester sound-absorbing cotton powder in the mixture to be distributed in pores of the aluminum plates to obtain composite aluminum;
(4) Crushing the composite aluminum into particles by a crusher to obtain a noise reduction body;
the noise reduction material also comprises a flame retardant body, and the flame retardant body is coated outside the noise reduction body to form the noise reduction material with a core-shell structure;
the flame retardant body comprises magnesium hydroxide and aluminum hydroxide, and the preparation method of the noise reduction material comprises the following steps:
(1) Taking 4-6 parts of aluminum chloride, 4-6 parts of magnesium chloride, 2-4 parts of noise reducer and 6-9 parts of sodium hydroxide solution by weight;
(2) Mixing and stirring aluminum chloride, magnesium chloride and a noise reducer to obtain a mixed solution;
(3) And mixing and stirring the mixed solution and a sodium hydroxide solution, filtering, taking filter residues, washing, drying and grinding to obtain the noise reduction material.
2. A cement powder according to claim 1, characterised in that: the polypropylene powder and the polyester sound-absorbing cotton powder are modified polypropylene powder and modified polyester sound-absorbing cotton powder, and the modification treatment comprises the following steps: and (3) soaking the polypropylene powder and the polyester sound-absorbing cotton powder in tetrakis (hydroxymethyl) phosphonium chloride, filtering, taking filter residues and drying to obtain the modified polypropylene powder and the modified polyester sound-absorbing cotton powder.
3. A cement powder according to claim 1, characterised in that: the particle size of the noise reduction body is 2-6mm.
4. Cement powder material according to claim 1, characterised in that: the bonding material also comprises sodium methylene bis-naphthalene sulfonate, and the mass ratio of phthalate ester coupling agent JTW-133, isopropyl tristearate titanate and sodium methylene bis-naphthalene sulfonate is (3-6): (2-7): (4-8).
5. Method for the preparation of cement powder according to any one of claims 1 to 4, characterized in that it comprises the following steps:
s1, primary mixing: mixing the noise reduction material and the bonding material according to a formula to obtain a primary mixed material;
s2, blending: and mixing the primary mixed material and the cement clinker to obtain cement powder.
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