CN110451906B - Light sound insulation material and preparation method thereof - Google Patents
Light sound insulation material and preparation method thereof Download PDFInfo
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- CN110451906B CN110451906B CN201910675248.0A CN201910675248A CN110451906B CN 110451906 B CN110451906 B CN 110451906B CN 201910675248 A CN201910675248 A CN 201910675248A CN 110451906 B CN110451906 B CN 110451906B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
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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
- C04B2201/20—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
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- Chemical Kinetics & Catalysis (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a light sound insulation material and a preparation method thereof. The light sound insulation material is made of foam concrete, and dry materials of the foam concrete comprise the following components: cement, dried sludge, silica fume, fly ash, gypsum powder, slag, shell powder, a water reducing agent and a foaming agent; wherein the foaming agent comprises the following components: polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, hydroxypropyl methyl cellulose, triethanolamine, surface hydrophilic modified nano soil powder and a surfactant. Also discloses a preparation method of the light sound insulation material. The light sound-insulating material has good sound-insulating effect, has the advantages of light weight, high strength, heat insulation and water resistance, is simple in preparation process and low in cost, can be used as a sound-insulating material for indoor and outdoor buildings, and has good application prospect.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a light sound insulation material and a preparation method thereof.
Background
Blowing agents, also known as blowing agents, are substances that promote foaming to form a closed cell or interconnected cell structure. Under specific conditions, a large amount of uniform and stable foam is formed in a short time by chemical reaction change or physical method treatment. The foaming agent is introduced into the concrete to generate tiny closed uniform bubbles in the concrete, so that the foam concrete with excellent characteristics of light weight, high strength, heat preservation, heat insulation, shock resistance and the like can be formed. However, the prior foam concrete has some problems including poor slurry stability, non-uniform bubbles after hardening, low strength, easy cracking, easy water absorption and the like. Many factors affect the performance of the foam concrete, including raw materials, mixing ratio, type of foaming agent, process, preparation equipment and the like.
The foaming agents applied to the foam concrete are various, and include rosin soap foaming agents, synthetic surfactant type foaming agents, animal protein foaming agents, vegetable protein foaming agents and the like. Over the course of decades, the composition of blowing agents has also evolved from single components to multicomponent compositions. The foaming agent used at present has the problems of large dosage and high cost, and when the foaming agent is stirred and mixed, air bubbles are easy to agglomerate, the size is increased, and the foam is unstable. In the prior art, nano foaming agents using nano particles as foam stabilizers are also mentioned, but the nano foaming agents are high in cost and are not suitable for mass production. Therefore, how to develop a foaming agent with low cost and stable foam for foam concrete is a key issue of attention of workers in the construction field.
The prior foam concrete material usually adopts natural sand as fine aggregate. However, with the development of social economy, waste resources such as sludge and slag in water treatment plants are more, and if the raw materials are discarded as garbage, the environment is polluted and land resources are occupied. How to recycle these resources, realize recycling, and turn waste into wealth becomes a problem that workers in the industry need to solve urgently.
The building, the hotel, the room and the like have common sound insulation requirements, and the sound insulation performance of the current building material is poor. Sound insulating materials are one of the widely used approaches to foam concrete. However, the sound insulation materials used in the present buildings still need to be further improved in terms of the overall properties, such as strength, thermal insulation, sound insulation, water resistance, and the like, and the preparation process and cost still need to be improved.
Disclosure of Invention
In order to overcome the problems of the prior art, such as performance, preparation process and cost, of the sound insulation material to be improved, the invention aims to provide a light sound insulation material, and the invention aims to provide a preparation method of the light sound insulation material.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides a light sound insulation material which is prepared from foam concrete, wherein a dry material of the foam concrete comprises the following components in parts by mass: 190-220 parts of cement, 40-80 parts of dried sludge, 20-30 parts of silica fume, 30-80 parts of fly ash, 50-100 parts of gypsum powder, 1-20 parts of slag, 3-10 parts of shell powder, 1-3 parts of a water reducing agent and 0.04-0.1 part of a foaming agent; wherein the foaming agent comprises the following components: polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, hydroxypropyl methyl cellulose, triethanolamine, surface hydrophilic modified nano soil powder and a surfactant.
In the foam concrete, the preferable mass portion of cement is 195-205 parts, the preferable mass portion of dried sludge is 50-70 parts, the preferable mass portion of silica fume is 22-28 parts, the preferable mass portion of fly ash is 40-70 parts, the preferable mass portion of gypsum powder is 60-80 parts, the preferable mass portion of slag is 2-10 parts, the preferable mass portion of shell powder is 4-8 parts, the preferable mass portion of water reducing agent is 1-2 parts, and the preferable mass portion of foaming agent is 0.04-0.06 part.
Preferably, in the lightweight sound insulation material, the foaming agent comprises the following components in percentage by mass: 0.5-5% of polyacrylamide, 3-20% of polyethyleneimine, 10-20% of polyvinylpyrrolidone, 35-50% of hydroxypropyl methyl cellulose, 1-5% of triethanolamine, 2-8% of surface hydrophilic modified nano soil powder and 15-30% of surfactant; further, the preferable mass percentage of the polyacrylamide is 1-4%; the preferable mass percentage of the polyethyleneimine is 5-14%; the preferable mass percentage of the polyvinylpyrrolidone is 12 to 18 percent; the preferable mass percentage of the hydroxypropyl methyl cellulose is 38-45 percent; the preferable mass percentage of the triethanolamine is 2 to 4 percent; the preferable mass percentage of the nano soil powder with the surface modified by hydrophilic modification is 3 to 6 percent; the preferable mass percentage of the surfactant is 17-26%.
Preferably, in the foaming agent of the light sound insulation material, the nano-clay powder with the surface modified by hydrophilicity is at least one selected from nano-attapulgite powder, nano-kaolin powder, nano-montmorillonite powder and nano-bentonite powder with the surface modified by hydrophilicity. The surface hydrophilic modification method is a conventional method in the field, such as soaking or coating treatment of the nano-soil powder by using a surfactant.
Preferably, in the foaming agent of the light sound insulation material, the surfactant is at least one selected from sulfate surfactants, sulfonate surfactants and fatty alcohol-polyoxyethylene ether; further preferably, the surfactant is at least one selected from sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, AEO-7 and AEO-9.
Preferably, in the lightweight soundproof material, the cement is at least one selected from the group consisting of portland cement, ordinary portland cement, portland slag cement, pozzolanic portland cement, portland fly ash cement, and composite portland cement.
Preferably, in the lightweight sound insulation material, the dried sludge is dried sludge in a water treatment plant.
Preferably, in the light sound insulation material, the particle size of the dried sludge is less than 2 mm; further preferably, the particle size of the dried sludge is less than 1 mm.
Preferably, the water content of the dried sludge in the light sound insulation material is less than or equal to 5 wt%.
Preferably, in the light sound insulation material, the particle size of the silica fume is 0.1-1 μm; more preferably, the particle size of the silica fume is 0.1 to 0.3. mu.m.
Preferably, in the light sound insulation material, the fly ash is selected from one or two of class I F fly ash and class II F fly ash; further preferably, the fly ash is selected from class ii class F fly ash.
Preferably, in the lightweight sound insulation material, the gypsum powder is desulfurized gypsum powder.
Preferably, in the light sound insulation material, the particle size of the gypsum powder is 20-100 μm; more preferably, the particle size of the gypsum powder is 50 to 80 μm.
Preferably, in the lightweight soundproof material, the slag is blast furnace slag.
Preferably, in the light sound insulation material, the particle size of the slag is 0.5 mm-2 mm; further preferably, the slag has a particle size of 0.5mm to 1 mm.
Preferably, in the light sound insulation material, the particle size of the shell powder is less than 2 mm; further preferably, the shell powder has a particle size of <1 mm.
Preferably, in the light sound insulation material, the water reducing agent is at least one selected from lignosulfonate water reducing agents, naphthalene water reducing agents, melamine water reducing agents, sulfamate water reducing agents, fatty acid water reducing agents and polycarboxylic acid water reducing agents; more preferably, the water reducing agent is at least one selected from the group consisting of a naphthalene water reducing agent and a polycarboxylic acid water reducing agent.
The invention also provides a preparation method of the light sound insulation material, which comprises the following steps:
1) mixing polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, hydroxypropyl methyl cellulose, triethanolamine, surface hydrophilic modified nano soil powder and a surfactant to obtain a foaming agent;
2) mixing a foaming agent with water to prepare a foaming agent solution;
3) mixing cement, dried sludge, silica fume, fly ash, gypsum powder, slag, shell powder, a water reducing agent and water to obtain cement slurry;
4) stirring the foaming agent solution, adding the cement slurry, and mixing to obtain foam concrete;
5) injecting the foam concrete into a mold, maintaining and removing the mold to obtain a light sound insulation material; the composition of the lightweight sound-insulating material is as described above.
Preferably, in step 2) of the preparation method of the light sound insulation material, the mass ratio of the foaming agent to the water is 1: (250-500); further preferably, the mass ratio of the foaming agent to the water is 1: (280-450); still further preferably, the mass ratio of the foaming agent to water is 1: (300-400).
Preferably, in step 3) of the preparation method of the light sound insulation material, the solid content of the cement slurry is 60 wt% to 80 wt%.
Preferably, in step 5) of the method for preparing the lightweight soundproof material, the mold can be selected according to the actual soundproof building needs, such as a brick mold, a panel mold or a door mold.
The components used for the lightweight soundproof material of the present invention are explained as follows:
drying sludge and slag
The amount of the sludge and slag dried by the water treatment plant is large, and the wastes contain a large amount of Ca, Si and other elements, so that the hydration reaction is facilitated, calcium silicate hydrate (C-S-H) gel with the gelling capacity is generated, and the strength and other physical properties of the gelled material are improved.
Second, shell powder
The shell powder can mutually fill pores with concrete, improve the compactness and impermeability of the concrete, and reduce concrete cracks.
Foaming agent
1. Polyacrylamide: the polyacrylamide can react with the cement, and the chemical combination between the polyacrylamide and the cement interface can improve the bearing capacity of the interface, thereby improving the toughness and fracture resistance of the interface and forming good physical and mechanical properties. The formation of a micro, closed cell body is facilitated by the addition of polyacrylamide.
2. Polyethyleneimine: the N atoms on the polyethyleneimine molecular chain are grafted with a certain amount of corresponding hydrophobic chains, and partial amino groups on the molecular chain are shielded, so that the polyethyleneimine can be internally hydrophilic and externally hydrophobic, the compatibility of foam and cement slurry can be enhanced, and the mechanical property of foam concrete is enhanced.
3. Polyvinylpyrrolidone: polyvinylpyrrolidone, as a water-soluble high-molecular compound, has good solubilization and coacervation properties and is beneficial to stabilizing foam.
4. Hydroxypropyl methylcellulose: the hydroxypropyl methyl cellulose water solution has high viscosity, so that the foaming agent solution can keep enough viscosity, and the stability of the foam is improved.
5. Triethanolamine: the triethanolamine and the hydroxypropyl methyl cellulose are selected to be matched with each other, so that the stability of foam can be improved, the compactness of the internal structure of the foam concrete is further improved, and the strength and the toughness are improved.
6. Surface hydrophilic modified nano soil powder: the selected nano soil powder is mineral soil powder with wide sources, and the cost is low. The nano soil powder with the surface modified by hydrophilicity can stabilize foam, and ensure that the produced concrete has pores with small pore diameter and uniform dispersion, thereby improving the performance of the foam concrete.
7. Surfactant (b): the surfactant has the main function of foaming, and the sulfate surfactant, the sulfonate surfactant and the fatty alcohol-polyoxyethylene ether used in the invention have the advantages of high foaming efficiency and good effect.
The invention has the beneficial effects that:
the light sound-insulating material has good sound-insulating effect, has the advantages of light weight, high strength, heat insulation and water resistance, is simple in preparation process and low in cost, can be used as a sound-insulating material for indoor and outdoor buildings, and has good application prospect.
Specifically, the present invention has the following advantages:
the foaming agent provided by the invention has higher foaming efficiency, can increase the amount of formed foam, can save the using amount of cement and reduce the weight of a product while meeting the engineering strength.
The invention utilizes the dried sludge of the water treatment plant and the shell powder as the fine aggregate of the foam slurry, realizes resource regeneration circulation, reduces the consumption of the cementing material and achieves the purposes of energy conservation and environmental protection.
Thirdly, the light sound insulation material can be widely applied to indoor and outdoor building sound insulation materials, such as sound insulation doors, sound insulation boards, sound insulation bricks, sound insulation walls and the like.
Drawings
FIG. 1 is a graph comparing foam concrete produced from the foam of the present invention with foam concrete produced from commercially available foam;
FIG. 2 is a scanning electron micrograph of foamed concrete made from commercially available foam;
FIG. 3 is a scanning electron microscope image of foamed concrete prepared from the foam of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The starting materials used in the examples are, unless otherwise specified, either conventionally commercially available or may be prepared by conventional methods.
Example 1
The dry material components of the foam concrete for preparing the light sound insulation material comprise the following components in parts by mass: 200 parts of cement, 60 parts of dried sludge of a water treatment plant, 25 parts of silica fume, 50 parts of fly ash, 70 parts of gypsum powder, 5 parts of slag, 5 parts of shell powder, 2 parts of a water reducing agent and 0.05 part of a foaming agent.
The foaming agent of the embodiment comprises the following components in parts by mass: 3 parts of polyacrylamide, 5 parts of polyethyleneimine, 12 parts of polyvinylpyrrolidone, 45 parts of hydroxypropyl methyl cellulose, 3 parts of triethanolamine, 6 parts of surface hydrophilic modified nano attapulgite powder and 26 parts of sodium dodecyl sulfate.
Wherein the used cement is ordinary P.O 32.5 grade cement; the average grain diameter of the silica fume is 0.1-0.3 μm; the fly ash is class II F fly ash; the gypsum powder is desulfurized gypsum powder with the average grain diameter of 50-80 mu m; the slag is blast furnace slag with the average grain diameter of 0.5 mm-1 mm; the water reducing agent is a polycarboxylic acid water reducing agent; the particle sizes of the dried sludge and the shell powder of the water treatment plant are both less than 1 mm. The water content of the dried sludge of the water treatment plant is less than or equal to 5 wt%.
The preparation method of the light sound insulation material comprises the following steps:
1) mixing polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, hydroxypropyl methylcellulose, triethanolamine, nano soil powder with hydrophilic modification on the surface and a surfactant according to the proportion to obtain a foaming agent;
2) mixing a foaming agent and water in a mass ratio of 1: 350 to prepare a foaming agent solution;
3) mixing cement, dried sludge, silica fume, fly ash, gypsum powder, slag, shell powder, a water reducing agent and water to obtain cement slurry; the solid content of the cement slurry is 61.5 wt%;
4) stirring the foaming agent solution for foaming, adding the cement slurry, and mixing to obtain foam concrete;
5) and (3) injecting the foam concrete into a wall brick mold, maintaining for 12 hours, and removing the mold to obtain the light sound insulation wall brick.
Example 2
The foaming agent used in the example consists of the following components in parts by mass: 4 parts of polyacrylamide, 12 parts of polyethyleneimine, 18 parts of polyvinylpyrrolidone, 40 parts of hydroxypropyl methyl cellulose, 4 parts of triethanolamine, 5 parts of surface hydrophilic modified nano kaolin powder and 17 parts of sodium dodecyl benzene sulfonate. The composition of the remaining components and the preparation method were the same as in example 1.
Example 3
The foaming agent used in the example consists of the following components in parts by mass: 3 parts of polyacrylamide, 10 parts of polyethyleneimine, 15 parts of polyvinylpyrrolidone, 45 parts of hydroxypropyl methyl cellulose, 2 parts of triethanolamine, 6 parts of surface hydrophilic modified nano montmorillonite powder and 19 parts of AEO-9. The composition of the remaining components and the preparation method were the same as in example 1.
Example 4
The foaming agent used in the example consists of the following components in parts by mass: 1 part of polyacrylamide, 14 parts of polyethyleneimine, 16 parts of polyvinylpyrrolidone, 38 parts of hydroxypropyl methyl cellulose, 3 parts of triethanolamine, 3 parts of surface hydrophilic modified nano bentonite powder and 25 parts of sodium dodecyl sulfate. The composition of the remaining components and the preparation method were the same as in example 1.
Example 5
The dry material components of the foam concrete for preparing the light sound insulation material comprise the following components in parts by mass: 200 parts of cement, 55 parts of dried sludge of a water treatment plant, 25 parts of silica fume, 65 parts of fly ash, 65 parts of gypsum powder, 5 parts of slag, 5 parts of shell powder, 2 parts of a water reducing agent and 0.05 part of a foaming agent. The composition of the remaining components and the preparation method were the same as in example 1.
Example 6
The dry material components of the foam concrete for preparing the light sound insulation material comprise the following components in parts by mass: 200 parts of cement, 50 parts of dried sludge of a water treatment plant, 25 parts of silica fume, 70 parts of fly ash, 60 parts of gypsum powder, 8 parts of slag, 6 parts of shell powder, 2 parts of a water reducing agent and 0.05 part of a foaming agent. The composition of the remaining components and the preparation method were the same as in example 1.
Example 7
The dry material components of the foam concrete for preparing the light sound insulation material comprise the following components in parts by mass: 200 parts of cement, 70 parts of dried sludge of a water treatment plant, 22 parts of silica fume, 40 parts of fly ash, 70 parts of gypsum powder, 5 parts of slag, 5 parts of shell powder, 2 parts of a water reducing agent and 0.05 part of a foaming agent. The composition of the remaining components and the preparation method were the same as in example 1.
Comparative example 1
The blowing agent used in this example was a commercially available w.r.grace product, the composition of the remaining components and the preparation method being the same as in example 1.
Comparative example 2
The dry material components of the foam concrete for preparing the light sound insulation material comprise the following components in parts by mass: 270 parts of cement, 22 parts of silica fume, 40 parts of fly ash, 70 parts of gypsum powder, 2 parts of a water reducing agent and 0.05 part of a foaming agent. The composition of the remaining components and the preparation method were the same as in example 1.
Comparative example 3
In this example, the blowing agent used in this example was a commercially available w.r.grace product, unlike comparative example 2. The composition and preparation method of the other components are the same as those of comparative example 2.
The foaming agent solution obtained in example 1 was stirred to produce a foam. The foam obtained in example 1 was compared with a foam obtained from a commercially available w.r.grace product under the same conditions.
FIG. 1 is a graph comparing a foam concrete produced from the foam of the present invention with a foam concrete produced from a commercially available foam. FIG. 2 is a scanning electron micrograph of a foamed concrete prepared from a commercially available foam. FIG. 3 is a scanning electron microscope image of foamed concrete prepared from the foam of the present invention. The foam concrete produced from the foam of the invention corresponds to the sample of example 1. The foam concrete produced from the commercially available foam corresponds to the sample of comparative example 1. As can be seen from comparison of FIGS. 1 to 3, the pore distribution of the commercially available foam concrete is not uniform, the pore size is large, and the average pore size is larger than 500 μm. The foam concrete prepared by the invention has the advantages of uniform pore distribution, small pore size and average pore size of 65 mu m.
The test results of the lightweight soundproof wall tiles obtained in examples 1 to 7 and comparative examples 1 to 3 are shown in tables 1 to 3. The test method is a conventional national standard or line standard test method in the industry.
Table 1 test results of examples 1 to 4 of light soundproof wall tile
| Performance of | Example 1 | Example 2 | Example 3 | Example 4 |
| Density (kg/m)3) | 530 | 522 | 528 | 526 |
| Compressive strength (MPa) | 3.5 | 3.4 | 3.6 | 3.4 |
| Coefficient of thermal conductivity (W/m. K) | 0.05 | 0.06 | 0.05 | 0.06 |
| 24cm thick wall air sound weighting sound insulation (dB) | 34 | 39 | 35 | 36 |
| Water absorption (%) | 3.8 | 4.2 | 4.0 | 4.4 |
Table 2 test results of examples 5 to 7 of light soundproof wall tile
| Performance of | Example 5 | Example 6 | Example 7 |
| Density (kg/m)3) | 535 | 534 | 540 |
| Compressive strength (MPa) | 3.5 | 3.4 | 3.4 |
| Coefficient of thermal conductivity (W/m. K) | 0.07 | 0.05 | 0.07 |
| 24cm thick wall air sound weighting sound insulation (dB) | 40 | 38 | 36 |
| Water absorption (%) | 3.9 | 4.4 | 4.2 |
Table 3 test results of comparative examples 1 to 3 of light sound-insulating wall brick
From the above detection and analysis results, it can be seen that the lightweight soundproof material prepared by the present invention has a better soundproof effect and also has better other properties such as density, compressive strength, heat insulation and water resistance, compared to the lightweight soundproof material of the comparative example.
The invention can greatly save the consumption of cement, recycle solid waste resources, further reduce the production cost and meet the development requirements of green building industry.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. A lightweight sound insulating material characterized by: the light sound insulation material is made of foam concrete, and dry materials of the foam concrete comprise the following components in parts by mass: 190-220 parts of cement, 40-80 parts of dried sludge, 20-30 parts of silica fume, 30-80 parts of fly ash, 50-100 parts of gypsum powder, 1-20 parts of slag, 3-10 parts of shell powder, 1-3 parts of a water reducing agent and 0.04-0.1 part of a foaming agent; the foaming agent comprises the following components: polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, hydroxypropyl methyl cellulose, triethanolamine, surface hydrophilic modified nano soil powder and a surfactant;
the foaming agent comprises the following components in percentage by mass: 0.5-5% of polyacrylamide, 3-20% of polyethyleneimine, 10-20% of polyvinylpyrrolidone, 35-50% of hydroxypropyl methyl cellulose, 1-5% of triethanolamine, 2-8% of surface hydrophilic modified nano soil powder and 15-30% of surfactant;
in the foaming agent, the nano-soil powder with the surface modified by hydrophilicity is selected from at least one of nano-attapulgite powder, nano-kaolin powder, nano-montmorillonite powder and nano-bentonite powder with the surface modified by hydrophilicity.
2. The lightweight sound insulating material according to claim 1, wherein: in the foaming agent, the surfactant is selected from at least one of sulfate surfactants, sulfonate surfactants and fatty alcohol-polyoxyethylene ether.
3. The lightweight sound insulating material according to claim 1, wherein: the dried sludge is dried sludge of a water treatment plant.
4. The lightweight sound insulating material according to claim 1, wherein: the slag is blast furnace slag.
5. The lightweight sound insulating material according to claim 1, wherein: the water reducing agent is at least one selected from lignosulfonate water reducing agents, naphthalene water reducing agents, melamine water reducing agents, sulfamate water reducing agents, fatty acid water reducing agents and polycarboxylic acid water reducing agents.
6. A preparation method of a light sound insulation material is characterized by comprising the following steps: the method comprises the following steps:
1) mixing polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, hydroxypropyl methyl cellulose, triethanolamine, surface hydrophilic modified nano soil powder and a surfactant to obtain a foaming agent;
2) mixing a foaming agent with water to prepare a foaming agent solution;
3) mixing cement, dried sludge, silica fume, fly ash, gypsum powder, slag, shell powder, a water reducing agent and water to obtain cement slurry;
4) stirring the foaming agent solution, adding the cement slurry, and mixing to obtain foam concrete;
5) injecting the foam concrete into a mold, maintaining and removing the mold to obtain a light sound insulation material; the lightweight soundproof material has the composition described in any one of claims 1 to 5.
7. The method for preparing a lightweight soundproof material according to claim 6, wherein: in the step 2), the mass ratio of the foaming agent to the water is 1: (250-500).
8. The method for preparing a lightweight soundproof material according to claim 6, wherein: in the step 3), the solid content of the cement slurry is 60 wt% -80 wt%.
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| CN112777967A (en) * | 2020-12-31 | 2021-05-11 | 湖北聚海环境科技有限公司 | Method for preparing energy-saving fireproof sound-insulation wall material by sludge solid waste and industrial slag |
| CN113185220A (en) * | 2021-04-26 | 2021-07-30 | 珠海澳大科技研究院 | Lightweight concrete |
| CN113264725A (en) * | 2021-04-27 | 2021-08-17 | 珠海澳大科技研究院 | Foam concrete and preparation method and application thereof |
| CN114105593A (en) * | 2021-12-20 | 2022-03-01 | 山东港基建设集团有限公司 | Light sound-insulation prefabricated slab and manufacturing method thereof |
| CN114368947B (en) * | 2022-01-11 | 2023-07-25 | 澳门大学 | Nano foam glass bead concrete for door plate and preparation method thereof |
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