CN109400070B - Lightweight microporous sound-absorbing concrete inner partition plate and manufacturing method thereof - Google Patents
Lightweight microporous sound-absorbing concrete inner partition plate and manufacturing method thereof Download PDFInfo
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- CN109400070B CN109400070B CN201811442033.6A CN201811442033A CN109400070B CN 109400070 B CN109400070 B CN 109400070B CN 201811442033 A CN201811442033 A CN 201811442033A CN 109400070 B CN109400070 B CN 109400070B
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland 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
- C04B2111/52—Sound-insulating materials
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
- C04B2201/30—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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- 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
Abstract
The invention provides a lightweight microporous sound-absorbing concrete inner partition board and a manufacturing method thereof, belonging to the technical field of recycling of building materials. The formula is as follows: 40.53-44.53 parts of cement, 18.23-22.23 parts of water, 27.23-31.23 parts of recycled concrete, 1.61-2.61 parts of lignin fiber, 0.95-1.25 parts of magnesium oxide, 0.95-1.25 parts of accelerator, 0.95-1.25 parts of silane coupling agent and 9.54-10.54 parts of foaming agent. The preparation method comprises the following steps: (1) uniformly mixing cement, recycled concrete and lignin fiber; (2) adding magnesium oxide, aluminum oxide and an accelerating agent and uniformly mixing; (3) adding water; (4) adding a silane coupling agent; (5) adding hydrogen peroxide, and stirring to form foaming slurry; (6) and (5) forming and maintaining. The inner partition board has stable density and strength, uniform pore structure distribution, easy dense forming and good heat and sound insulation performance.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of building material recycling, in particular to a lightweight microporous sound-absorbing concrete inner partition board and a manufacturing method thereof.
[ background of the invention ]
With the high-speed development of economy in China, the urbanization process is deepened continuously, the integrated layout of cities and towns is extended continuously, and a large amount of concrete is applied to buildings or building components every year. The traditional building concrete is formed by using cement as a gel material, using sand and stone as aggregates and stirring the aggregates and water according to a certain proportion, has the characteristics of convenient construction, high strength and the like, is widely applied, but has higher and higher requirements on the sound insulation and heat preservation performance of building materials along with the improvement of user demands, and the building heat insulation and sound insulation material is used for reducing the heat loss of the indoor environment of a building, can effectively reduce the load of an air conditioner of the building and the energy consumption of the air conditioner, can also reduce the emission of carbon dioxide and other harmful substances, and is an important component for constructing an energy-saving building and implementing energy-saving reconstruction. Sound insulation material generally requires density height, thickness big etc. and composite building material density on the existing market is less, and the sound insulation effect is not obvious after the construction is accomplished, in order to reach syllable-dividing purpose, often realizes through installing soundproof cotton or puigging additional on the building wall, but the cost is generally higher, and has increased the degree of difficulty of construction.
In addition, as new buildings stand, a large amount of waste concrete is always generated by the removal of a large amount of original buildings. At present, the waste concrete is recycled and mainly prepared into recycled aggregate by separating, removing impurities and crushing the waste concrete in a physical mode. Because most of the recycled aggregate is carbonized silicate, electronegativity is neutralized, colloidal property is poor, and the recycled aggregate can only be used as a filler of concrete and cannot be well utilized. The chemical treatment and recycling of waste concrete to produce concrete blocks have been reported, but most of the waste concrete blocks have complex processes, high cost and unobvious economic benefits.
Therefore, the waste concrete is better recycled, and the indoor heat-insulating and sound-insulating material is developed, so that the heat-insulating and sound-insulating property of the building roof is improved, the indoor living environment is improved, the energy can be saved, the use cost of the building is reduced, and the continuous development of national economy is kept, and the method has very important significance; but the related research work requires further efforts of researchers.
[ summary of the invention ]
The invention aims to: aiming at the problems, the lightweight microporous sound-absorbing concrete inner partition board and the manufacturing method thereof are provided, and the inner partition board has stable density and strength, uniform pore structure distribution, easy dense forming and good heat preservation and sound insulation performance. The method effectively utilizes the recycled concrete, reduces the consumption of non-renewable clay resources and improves the social economic benefit.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a lightweight microporous sound-absorbing concrete inner partition wall board is prepared from the following raw materials in parts by weight: 40.53-44.53 parts of cement, 18.23-22.23 parts of water, 27.23-31.23 parts of recycled concrete, 1.61-2.61 parts of lignin fiber, 0.95-1.25 parts of magnesium oxide, 0.95-1.25 parts of accelerator, 0.95-1.25 parts of silane coupling agent and 9.54-10.54 parts of foaming agent;
the recycled concrete is powder particles with the particle size of less than 2mm, which are prepared by screening, crushing and grinding construction wastes serving as raw materials;
the foaming agent comprises an alumina/aluminum powder mixture and hydrogen peroxide, wherein the hydrogen peroxide is calculated according to the mass concentration of 30%, and the mass ratio of the hydrogen peroxide to the alumina/aluminum powder mixture is 4.8-6.0: 1, wherein the aluminum powder accounts for 25-35% of the mixture of aluminum oxide and aluminum powder by mass percent.
Preferably, the accelerator is an inorganic salt accelerator.
Preferably, the cement is 42.5-grade ordinary portland cement, and the silane coupling agent is KH-550.
Preferably, the mass ratio of the hydrogen peroxide to the alumina is 5.67: 1.
the invention also provides a preparation method of the light microporous sound-absorbing concrete inner partition board, which comprises the following steps:
(1) preparing all raw materials according to the parts by weight, and mixing and stirring cement, recycled concrete and lignin fiber uniformly;
(2) adding magnesium oxide, aluminum oxide and an accelerating agent into the mixture obtained in the step (1), and uniformly mixing;
(3) adding weighed water into the mixture obtained in the step (2), and mixing and stirring uniformly;
(4) adding a silane coupling agent into the mixture obtained in the step (3), and uniformly mixing to form a viscous mixture;
(5) adding hydrogen peroxide into the viscous mixture obtained in the step (4), and uniformly stirring to form foamed slurry;
(6) and (4) adding the foamed slurry obtained in the step (5) into a test block mold, oscillating, stirring, pressing and molding, and curing at normal temperature and normal pressure in a shade place to obtain the lightweight microporous sound-absorbing concrete inner partition board.
Preferably, the stirring time in the step (1) and the step (2) is 10-15 min; and (4) stirring for 2-5 min.
In the invention, the recycled concrete is a concrete material which is used for many years, is hydrated and carbonized by carbon dioxide and water in the air in long-term use, and is required to have alkalinity in order to generate hydration reaction, the addition of the alkali metal oxides of magnesium oxide and aluminum oxide can not only prevent the further carbonization of the material, but also can remold the colloidal property of the waste concrete, can replace part of cement when in use, and ensure the hydration reaction when in subsequent concrete preparation.
When the concrete inner wall partition board is manufactured, firstly, cement, regenerated concrete, lignin, magnesium oxide, aluminum oxide and an accelerator reagent are uniformly mixed to restore the alkalinity of the regenerated concrete, then a silane coupling agent is added, hydrogen peroxide is sprayed, the hydrogen peroxide is mainly added to initiate inorganic silicate, the silane coupling agent and the lignin to be subjected to crosslinking compounding, and the lignin is a biopolymer which is formed by mutually connecting three phenylpropane units through ether bonds and carbon-carbon bonds and has a three-dimensional network structure. In the reaction process, an X group of the silane coupling agent is combined with inorganic silicate, a Y group is combined with lignin under the oxidation action of hydrogen peroxide, heat and gas can be released in the reaction, the generated gas has a foaming effect, a plurality of micropores can be generated by high-speed stirring, and the released heat can promote a crosslinking reaction; after the lignin and the silicate are crosslinked and compounded, the lignin and the silicate are connected together like a large net, so that cracks of the concrete test block can be restrained, the tensile strength of the concrete test block is increased, and the inner pores of the concrete are communicated; after the incident sound waves enter the concrete, the sound waves drive the lignin to vibrate together, so that the lignin generates elastic deformation and consumes a part of sound energy, and the sound absorption effect of the test block is enhanced; in addition, the crosslinking compounding can also increase the agglomeration performance of the recycled concrete, so that the recycled concrete can effectively agglomerate with cement, and the cement can be replaced.
Ordinary concrete, stirring mix the prefabrication back, need carry out the maintenance, the in-process of maintenance, on the one hand need place in dark place, and on the other hand needs the water spray to ensure that the hydration reaction of cement goes on completely, prevents to shrink inequality simultaneously, leads to inside stress inequality, takes place the fracture. According to the invention, the lignin is added into the raw materials, the interior of the molecular structure of the lignin is hollow, the lignin has a capillary effect, part of water is filled in the lignin in the cross-linking process, and the water is released in the subsequent curing process without water spraying curing, so that the water spraying process in the curing process can be omitted, and the labor is saved.
In addition, when the concrete inner wall partition board is manufactured, the added foaming agent comprises two parts of hydrogen peroxide and an alumina/aluminum powder mixture, in order to ensure that the porosity of the inner wall partition board is larger and more uniform and ensure the effects of sound absorption and heat preservation, the adding amount of hydrogen peroxide is higher than normal, after the hydrogen peroxide is added, the foamed inner wall partition board has collapse if not fully maintained due to faster reaction, the invention adds the alumina/aluminum powder mixture as a foaming agent, the alumina/aluminum powder mixture utilizes the heat generated in the cement hydration process, the process of generating the meta-aluminate (sodium) by the reaction in the alkaline environment can generate gas, and the process can be continuously carried out within 3-12h after the hydrogen peroxide reaction is finished, so that the balance between the pressure of the pores in the wallboard and the atmospheric pressure is continuously ensured, the foaming effect is ensured, and the wallboard is prevented from internal collapse before the strength is reached.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the colloidal property of the waste concrete is remolded by adding raw materials such as alkali metal oxide magnesium oxide, lignin, silane coupling agent and the like into the waste concrete particles, so that the waste concrete particles can be used for replacing part of cement during use, and the utilization rate of recycled waste concrete is improved; the high-efficiency recycling of the waste concrete of the building is realized, and the consumption of renewable resources is reduced.
2. According to the invention, the inorganic silicate, the silane coupling agent and the lignin are crosslinked and compounded by spraying the hydrogen peroxide, so that the interior of the concrete has a multiple-mesh structure, the elasticity of the concrete is increased, cracks of the concrete test block can be restrained, the tensile strength of the concrete test block is increased, and the pores in the concrete are communicated. After the incident sound waves enter the concrete, the sound waves drive the lignin to vibrate together, so that the lignin generates elastic deformation and consumes a part of sound energy, and the sound absorption effect of the test block is enhanced.
3. The invention adopts the hydrogen peroxide and the alumina/aluminum powder mixture as the composite foaming agent, so that the foaming is continuously carried out in the maintenance process of the concrete inner partition board, the collapse of air holes in the inner partition board is avoided, the porosity in the inner partition board is ensured, and the sound absorption and heat preservation effects are ensured.
4. The wallboard inner partition board prepared by the invention has the advantages of light weight, high strength, heat preservation, sound insulation and the like, is a light green environment-friendly material, can be widely applied to non-bearing walls, and can reduce the load of high-rise buildings, thereby improving the safety coefficient of the high-rise buildings and prolonging the service life of the high-rise buildings; the construction cost of the structural engineering can be effectively reduced, and the method is energy-saving, environment-friendly and economical and has wide popularization and application prospects.
5. The invention uses recycled concrete to produce the lightweight microporous sound-absorbing concrete inner partition board, has simple production process and low energy resource consumption, does not discharge wastes in the whole production process, almost has no energy consumption except the stirring process, and belongs to the environment-friendly technology.
[ detailed description ] embodiments
Hereinafter, embodiments of the present invention will be described in detail. This invention may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, these embodiments are provided to explain the principles of the invention and its practical application to thereby enable others skilled in the art to understand the invention for various embodiments and with various modifications as are suited to the particular use contemplated.
In the following embodiment of the invention, the recycled concrete is prepared by crushing waste building cement and building blocks, and screening particles with the particle size of less than 2 mm. The accelerator is inorganic salt accelerator; GH-405 accelerator was used in the following examples, but it is understood that the present invention can be practiced with other types of accelerators. The cement used is 42.5 grade ordinary portland cement.
Example 1
The lightweight microporous sound-absorbing concrete inner partition board is prepared from the following raw materials: 40.53kg of cement, 18.23kg of water, 27.23kg of recycled concrete, 1.61kg of lignin fiber, 0.95kg of magnesium oxide, 0.95kg of accelerating agent, 0.95kg of silane coupling agent and 9.54kg of foaming agent;
the foaming agent comprises an aluminum oxide/aluminum powder mixture and hydrogen peroxide, wherein the hydrogen peroxide is calculated according to the mass concentration of 30%, and the mass ratio of the hydrogen peroxide to the aluminum oxide/aluminum powder mixture is 4.8: 1, wherein in the alumina/aluminum powder mixture, the mass percent of aluminum powder is 25%; the silane coupling agent is KH-550.
The invention also provides a preparation method of the light microporous sound-absorbing concrete inner partition board, which comprises the following steps:
(1) preparing all raw materials according to the parts by weight, mixing and uniformly stirring the cement, the recycled concrete and the lignin fiber, and stirring for 10 min;
(2) adding magnesium oxide, aluminum oxide and an accelerating agent into the mixture obtained in the step (1), and uniformly mixing for 10 min;
(3) adding weighed water into the mixture obtained in the step (2), and uniformly mixing for 2 min;
(4) adding a silane coupling agent into the mixture obtained in the step (3), and uniformly mixing and stirring for 2min to form a viscous mixture;
(5) adding hydrogen peroxide into the viscous mixture obtained in the step (4), and uniformly stirring to form foamed slurry;
(6) and (3) adding the foamed slurry obtained in the step (5) into a test block mold, oscillating, stirring for 15min, pressing under the pressure of 20Mpa, molding for 3h, and curing at the normal temperature and the normal pressure in a shade place for 28d to obtain the lightweight microporous sound-absorbing concrete inner partition board.
Example 2
The lightweight microporous sound-absorbing concrete inner partition board is prepared from the following raw materials: 42.53kg of cement, 20.23kg of water, 29.23kg of recycled concrete, 2.11kg of lignin fiber, 1.15kg of magnesium oxide, 1.05kg of an accelerator, 1.15kg of a silane coupling agent and 10.04kg of a foaming agent;
the foaming agent comprises an alumina/aluminum powder mixture and hydrogen peroxide, wherein the hydrogen peroxide is calculated according to the mass concentration of 30%, and the mass ratio of the hydrogen peroxide to the alumina/aluminum powder mixture is 5.67: 1, wherein the aluminum powder accounts for 30 percent of the mixture of the aluminum oxide and the aluminum powder by mass percent; the silane coupling agent is KH-550.
The invention also provides a preparation method of the light microporous sound-absorbing concrete inner partition board, which comprises the following steps:
(1) preparing all raw materials according to the parts by weight, mixing and uniformly stirring the cement, the recycled concrete and the lignin fiber, and stirring for 12 min;
(2) adding magnesium oxide, aluminum oxide and an accelerating agent into the mixture obtained in the step (1), and uniformly mixing for 12 min;
(3) adding weighed water into the mixture obtained in the step (2), and uniformly mixing for 3 min;
(4) adding a silane coupling agent into the mixture obtained in the step (3), and uniformly mixing and stirring for 3min to form a viscous mixture;
(5) adding hydrogen peroxide into the viscous mixture obtained in the step (4), and uniformly stirring to form foamed slurry;
(6) and (3) adding the foamed slurry obtained in the step (5) into a test block mold, oscillating, continuously stirring for 15min, pressing under the pressure of 20Mpa, molding for 3h, and curing at the normal temperature and the normal pressure in a shade place for 28d to obtain the lightweight microporous sound-absorbing concrete inner partition board.
Example 3
The lightweight microporous sound-absorbing concrete inner partition board is prepared from the following raw materials: 44.53kg of cement, 22.23kg of water, 31.23kg of recycled concrete, 2.61kg of lignin fiber, 1.25kg of magnesium oxide, 1.25kg of an accelerator, 1.25kg of a silane coupling agent and 10.54kg of a foaming agent;
the foaming agent comprises an alumina/aluminum powder mixture and hydrogen peroxide, wherein the hydrogen peroxide is calculated according to the mass concentration of 30%, the mass ratio of the hydrogen peroxide to the alumina/aluminum powder mixture is 6.0: 1, and the aluminum powder accounts for 35% of the alumina/aluminum powder mixture; the silane coupling agent is KH-550.
The invention also provides a preparation method of the light microporous sound-absorbing concrete inner partition board, which comprises the following steps:
(1) preparing all raw materials according to the parts by weight, mixing and uniformly stirring the cement, the recycled concrete and the lignin fiber, and stirring for 15 min;
(2) adding magnesium oxide, aluminum oxide and an accelerating agent into the mixture obtained in the step (1), and uniformly mixing for 15 min;
(3) adding weighed water into the mixture obtained in the step (2), and uniformly mixing for 5 min;
(4) adding a silane coupling agent into the mixture obtained in the step (3), and uniformly mixing and stirring for 5min to form a viscous mixture;
(5) adding hydrogen peroxide into the viscous mixture obtained in the step (4), and uniformly stirring to form foamed slurry;
(6) and (3) adding the foamed slurry obtained in the step (5) into a test block mold, oscillating, continuously stirring for 15min, pressing under the pressure of 20Mpa, molding for 3h, and curing at the normal temperature and the normal pressure in a shade place for 28d to obtain the lightweight microporous sound-absorbing concrete inner partition board.
Comparative example 1
This comparative example differs from example 3 in that: no lignin was added.
Comparative example 2
This comparative example differs from example 3 in that: hydrogen peroxide and silane coupling agent were not added.
Comparative example 3
This comparative example differs from example 3 in that: in the foaming agent, the mass ratio of hydrogen peroxide to the alumina/aluminum powder mixture is 2: 1.
Comparative example 4
This comparative example differs from example 3 in that: the total amount of blowing agent was 3 kg.
The inner partition boards are manufactured in the manners of examples 1-3 and comparative example 4 respectively, during manufacturing, the same test block mold is adopted for shaping, inner partition board samples with the same specification are obtained through 28d maintenance, performance tests are carried out on the inner partition boards obtained in each example, and the obtained test results are shown in table 1. Wherein, in the sound absorption test, the thickness of the test block is 10 cm.
Table 1 Performance test results of inner partition boards after 28d maintenance
As can be seen from the results in Table 1, the sound absorption coefficient of the concrete inner partition boards prepared in examples 1 to 3 of the present invention is not less than 0.35, the thermal conductivity is not more than 0.50W/(m.K), and the specific gravity is not more than 800.00kg/m3Compressive strength of not less than 13.46MPa and flexural strength of not more thanLess than 3.72 MPa. In comparative example 1, the lignin is not added in comparative example 1, and a corresponding net structure is lacked, so that the elasticity is poor, and the sound absorption effect is poor. In comparative example 2, since hydrogen peroxide and a silane coupling agent were not added, a fine cell structure was not formed, and the sound absorption and heat insulation properties were significantly lower than those of the present invention. Compared with the comparative example 3, the proportion of hydrogen peroxide and the mixture of alumina/aluminum powder in the foaming agent is unreasonable, the content of hydrogen peroxide is insufficient, the porosity is poor, and the heat preservation effect and the sound absorption effect of the foaming agent are affected. Comparative example 4 the blowing agent was added in a small amount, resulting in an increase in specific gravity, which had an effect on both heat conductivity and sound absorption. The tests collectively show that the raw materials in the invention are matched with each other, so that the waste concrete can be recycled, and the concrete inner wall heat-insulating inner partition board with better performance can be finally obtained.
The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.
Claims (4)
1. A lightweight microporous sound-absorbing concrete inner partition wall board is characterized by being prepared from the following raw materials in parts by weight: 40.53-44.53 parts of cement, 18.23-22.23 parts of water, 27.23-31.23 parts of recycled concrete, 1.61-2.61 parts of lignin fiber, 0.95-1.25 parts of magnesium oxide, 0.95-1.25 parts of accelerator, 0.95-1.25 parts of silane coupling agent and 9.54-10.54 parts of foaming agent;
the recycled concrete is powder particles with the particle size of less than 2mm, which are prepared by screening, crushing and grinding construction wastes serving as raw materials;
the foaming agent comprises a first foaming agent and a second foaming agent, the first foaming agent is an aluminum oxide/aluminum powder mixture, the second foaming agent is hydrogen peroxide, the hydrogen peroxide is calculated according to the mass concentration of 30%, and the mass ratio of the hydrogen peroxide to the aluminum oxide/aluminum powder mixture is 4.8-6.0: 1, wherein in the alumina/aluminum powder mixture, the aluminum powder accounts for 25-35% by mass;
the preparation method comprises the following steps:
(1) preparing all raw materials according to the parts by weight, and mixing and stirring cement, recycled concrete and lignin fiber uniformly;
(2) adding magnesium oxide, an aluminum oxide/aluminum powder mixture and an accelerating agent into the mixture obtained in the step (1), and mixing and stirring uniformly;
(3) adding weighed water into the mixture obtained in the step (2), and mixing and stirring uniformly;
(4) adding a silane coupling agent into the mixture obtained in the step (3), and uniformly mixing to form a viscous mixture;
(5) adding hydrogen peroxide into the viscous mixture obtained in the step (4), and uniformly stirring to form foamed slurry;
(6) and (4) adding the foamed slurry obtained in the step (5) into a test block mold, oscillating, stirring, pressing and molding, and curing at normal temperature and normal pressure in a shade place to obtain the lightweight microporous sound-absorbing concrete inner partition board.
2. The lightweight microporous sound-absorbing concrete internal partition wall panel according to claim 1, wherein: the accelerator is an inorganic salt accelerator.
3. The lightweight microporous sound-absorbing concrete internal partition wall panel according to claim 1, wherein: the cement is 42.5-grade ordinary portland cement, and the silane coupling agent is KH-550.
4. The method for preparing a lightweight microporous sound-absorbing concrete inner partition board according to claim 1, wherein the method comprises the following steps: the stirring time in the step (1) and the step (2) is 10-15 min; and (4) stirring for 2-5 min.
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| CN109761635A (en) * | 2019-03-26 | 2019-05-17 | 桂林航天工业学院 | A kind of interior wall partition and preparation method thereof using regeneration concrete |
| CN111941595A (en) * | 2020-08-24 | 2020-11-17 | 湖南大学 | Preparation technology process and maintenance mode of heat-insulation composite wallboard |
| CN114804777B (en) * | 2022-05-23 | 2023-03-07 | 张家口广建新材料有限公司 | Lightweight core-pulling foam concrete inner partition board and preparation method thereof |
| CN115403332A (en) * | 2022-08-29 | 2022-11-29 | 淮安春晟轻源新材料科技有限公司 | Solid waste filling type light energy-saving inner partition board and preparation method thereof |
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