CN112062597A - Lightweight concrete, preparation method and application thereof, and building material - Google Patents
Lightweight concrete, preparation method and application thereof, and building material Download PDFInfo
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- CN112062597A CN112062597A CN202010983543.5A CN202010983543A CN112062597A CN 112062597 A CN112062597 A CN 112062597A CN 202010983543 A CN202010983543 A CN 202010983543A CN 112062597 A CN112062597 A CN 112062597A
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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
- C04B28/06—Aluminous cements
-
- 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
-
- 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
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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
Abstract
The invention provides lightweight concrete, a preparation method, application and a building material thereof, and relates to the technical field of concrete. The lightweight concrete provided by the invention comprises ceramsite, perlite, sulphoaluminate cement, polyvinyl alcohol, polypropylene fiber and water. The synergistic effect of the raw materials is fully exerted by mixing the raw materials according to a specific proportion. The concrete provided by the invention is light in weight, good in heat preservation performance and frost resistance, not easy to break and low in cost, and can be used in the assembly type field of light steel buildings and the like. The preparation method of the lightweight concrete provided by the invention is simple and rapid to operate.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to lightweight concrete, a preparation method and application thereof, and a building material.
Background
In recent years, the construction industry has been developed rapidly, powerful material support is provided for improving the physical life and mental life of people, and concrete plays an indispensable role in the development of the construction industry.
The traditional concrete has heavy quality, and is easy to cause uneven settlement of the ground due to insufficient bearing capacity of the foundation in the construction process of buildings and the like, the traditional treatment mode is to improve the bearing capacity of the foundation but cannot solve the problems fundamentally, and the problems of overlong construction period, overhigh manufacturing cost and the like also exist. Therefore, a lightweight concrete is urgently needed to be found.
The existing light composite concrete is usually composed of perlite, cement and the like, has certain heat preservation performance and can be used as a heat preservation and insulation material, but the concrete made of the perlite, the cement and the like has low strength and is easy to break, and for certain fields with higher requirements, the existing light composite concrete is still not light enough in quality and not ideal in heat preservation effect.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
A first object of the present invention is to provide a lightweight concrete which is lightweight, has a good thermal insulation effect, is not easily broken, has a low cost, and can solve at least one of the above problems.
The second purpose of the invention is to provide a preparation method of lightweight concrete, which is simple and rapid to operate.
The third purpose of the invention is to provide the application of the lightweight concrete in the building field.
A fourth object of the present invention is to provide a building material.
In order to solve the technical problems, the following technical scheme is adopted:
in a first aspect, the invention provides a lightweight concrete, which comprises the following components in parts by weight:
150-210 parts of ceramsite, 60-90 parts of perlite, 260-320 parts of sulphoaluminate cement, 0.4-1 part of polyvinyl alcohol, 0.8-1.2 parts of polypropylene fiber and 130-170 parts of water.
As a further technical scheme, the paint comprises the following components in parts by weight:
160-200 parts of ceramsite, 68-82 parts of perlite, 275-305 parts of sulphoaluminate cement, 0.6-0.8 part of polyvinyl alcohol, 0.9-1.1 part of polypropylene fiber and 140-160 parts of water.
As a further technical scheme, the paint comprises the following components in parts by weight:
180 parts of ceramsite, 75 parts of perlite, 290 parts of sulphoaluminate cement, 0.7 part of polyvinyl alcohol, 1 part of polypropylene fiber and 150 parts of water.
As a further technical scheme, the particle size of the ceramsite is 2-12 mm, preferably 5-10 mm.
According to a further technical scheme, the particle size of the perlite is 10-40 meshes, and preferably 20-30 meshes.
In a second aspect, the present invention provides a method for preparing lightweight concrete, comprising the following steps:
mixing the ceramsite, the perlite, the sulphoaluminate cement, the polyvinyl alcohol and the polypropylene fiber according to the formula ratio for the first time, and then adding water for mixing for the second time to prepare the lightweight concrete.
As a further technical scheme, the first mixing mode comprises stirring;
the stirring time is 0.5-2 min, preferably 1 min.
As a further technical scheme, the second mixing mode comprises stirring;
the stirring time is 0.5-2 min, preferably 1 min.
In a third aspect, the invention provides a light concrete for use in the field of construction.
In a fourth aspect, the present invention provides a building material, which is mainly prepared from lightweight concrete.
Compared with the prior art, the invention has the following beneficial effects:
the lightweight concrete provided by the invention comprises ceramsite, perlite, sulphoaluminate cement, polyvinyl alcohol, polypropylene fiber and water. The ceramsite is light in weight, low in water absorption rate, good in heat insulation performance and frost resistance, and capable of effectively relieving the technical problems that a concrete material is easy to wet and the heat insulation effect and the frost resistance effect are poor; the perlite is light and has good heat insulation performance, so that the heat insulation effect of the concrete is further improved; the sulphoaluminate cement has short setting time and high strength, and can effectively shorten the construction period of concrete; the polyvinyl alcohol can be matched with other materials to improve the strength of concrete; the polypropylene fiber can increase the internal traction of the concrete, effectively prevent the concrete from breaking after being coagulated and has lower cost; the synergistic effect of the raw materials is fully exerted by mixing the raw materials according to a specific proportion. The concrete of the invention has light weight, is 1/3 of the mass of the traditional concrete, has the compressive strength of up to 20MPa, the sound insulation quantity of 40 decibels and the heat conductivity coefficient of 0.08W/(m.k), has good heat insulation performance and frost resistance, is not easy to break and has low cost, and can be used in the assembly field of light steel buildings and the like.
The preparation method of the lightweight concrete provided by the invention is simple and rapid to operate.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to embodiments and examples, but those skilled in the art will understand that the following embodiments and examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Those who do not specify the conditions are performed according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In a first aspect, the invention provides a lightweight concrete, which comprises the following components in parts by weight:
150-210 parts of ceramsite, 60-90 parts of perlite, 260-320 parts of sulphoaluminate cement, 0.4-1 part of polyvinyl alcohol, 0.8-1.2 parts of polypropylene fiber and 130-170 parts of water.
Ceramsite is a lightweight aggregate produced by foaming in a rotary kiln. It has spherical shape, smooth and hard surface and honeycomb inside. Compared with ceramsite and other materials, the ceramsite has lighter weight and good heat insulation performance and frost resistance. According to the invention, the concrete is prepared by taking the ceramsite as the raw material, so that the technical problems that the concrete material is easy to wet and the heat preservation effect and the anti-freezing effect are poor can be effectively solved.
The amount of the ceramsite in the present invention is typically, but not limited to, 150 parts, 160 parts, 170 parts, 180 parts, 190 parts, 200 parts or 210 parts.
Perlite is a novel light and multifunctional material, and has the characteristics of light apparent density, low thermal conductivity coefficient, good chemical stability, wide application temperature range, small moisture absorption capacity, no toxicity, no odor, fire prevention, sound absorption and the like. The concrete prepared by using the perlite as the raw material can further improve the heat preservation effect of the concrete and reduce the quality of the concrete.
In the present invention, the parts of perlite are typically, but not limited to, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, or 90 parts.
The sulphoaluminate cement is a hydraulic cementing material with the properties of early strength, quick hardening, low alkalinity and the like, which is prepared by using limestone, alumina and gypsum with proper components as raw materials, calcining at low temperature (1300-1350 ℃) to obtain clinker with anhydrous calcium sulphoaluminate and dicalcium silicate as main minerals and adding a proper amount of mixed materials (gypsum, limestone and the like) for common grinding. The sulphoaluminate cement can be demolded within 2-3 hours, the strength can reach 70% -80% within 24 hours, the sulphoaluminate cement has construction conditions, and compared with common cement, the sulphoaluminate cement saves time and shortens the construction period. The sulphate aluminum cement is used as the raw material to prepare the concrete, so that the strength of the concrete can be effectively improved, and the construction period of the concrete is shortened.
In the present invention, the number of parts of the sulphoaluminate cement is typically, but not limited to, 260 parts, 270 parts, 280 parts, 290 parts, 300 parts, 310 parts or 320 parts.
Polyvinyl alcohol is an important chemical raw material, and is generally used for fabric treating agents, emulsifiers, paper coatings, adhesives and the like. In the invention, the polyvinyl alcohol is used as a raw material to prepare the concrete, and the strength of the concrete is improved by matching with other materials.
In the present invention, the part of the polyvinyl alcohol is typically, but not limited to, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part or 1 part.
The polypropylene fiber has light weight, high strength, corrosion resistance and small heat conductivity coefficient. The invention takes the polypropylene fiber as the raw material to prepare the concrete, can increase the internal traction of the concrete, effectively prevents the concrete from breaking after being condensed, further improves the heat preservation performance of the concrete, reduces the quality of the concrete, and is cheaper than the existing polyimide fiber.
In the present invention, the portion of the polypropylene fiber is typically, but not limited to, 0.8 parts, 0.9 parts, 1 part, 1.1 parts or 1.2 parts.
In the invention, after the raw materials are mixed, water is added to prepare the concrete. The amount of water added to the concrete is typically, but not limited to, 130 parts, 140 parts, 150 parts, 160 parts, or 170 parts.
The lightweight concrete provided by the invention comprises ceramsite, perlite, sulphoaluminate cement, polyvinyl alcohol, polypropylene fiber and water. The synergistic effect of the raw materials is fully exerted by mixing the raw materials according to a specific proportion. The concrete of the invention has light weight, good heat preservation performance and frost resistance, difficult fracture and low cost.
As a further technical scheme, the paint comprises the following components in parts by weight:
160-200 parts of ceramsite, 68-82 parts of perlite, 275-305 parts of sulphoaluminate cement, 0.6-0.8 part of polyvinyl alcohol, 0.9-1.1 part of polypropylene fiber and 140-160 parts of water.
In the invention, the concrete performance is better by further optimizing the content of each raw material in the concrete.
As a further technical scheme, the paint comprises the following components in parts by weight:
180 parts of ceramsite, 75 parts of perlite, 290 parts of sulphoaluminate cement, 0.7 part of polyvinyl alcohol, 1 part of polypropylene fiber and 150 parts of water.
In the invention, the concrete performance is better by further optimizing the content of each raw material in the concrete.
As a further technical scheme, the particle size of the ceramsite is 2-12 mm, for example, but not limited to, 2mm, 4mm, 6mm, 8mm, 10mm or 12mm, preferably 5-10 mm.
In the invention, the strength and the practical field of concrete are improved by further optimizing and adjusting the grain diameter of the ceramsite, and a thin plate with the thickness of 50mm can be realized.
As a further technical scheme, the particle size of the perlite is within the range of 10-40 meshes. The particle size of the perlite influences the cohesiveness of the perlite, and further influences the properties of the concrete such as strength and the like. In the invention, the concrete prepared by using the perlite with the grain size within the range of 10-40 meshes as the raw material has better performance.
The 'particle size of the perlite is 10-40 meshes', the perlite can be screened by using a 10-mesh sieve, the intercepted part is removed after the screening is finished, the part passing through the sieve is screened by using a 40-mesh sieve, and the intercepted part is the perlite with the particle size of 10-40 meshes.
As a further technical scheme, the particle size of the perlite is 20-30 meshes.
In the invention, the concrete has lighter weight and better heat preservation and sound insulation effects by further optimizing and adjusting the particle size of the perlite.
In a second aspect, the present invention provides a method for preparing lightweight concrete, comprising the following steps:
mixing the ceramsite, the perlite, the sulphoaluminate cement, the polyvinyl alcohol and the polypropylene fiber according to the formula ratio for the first time, and then adding water for mixing for the second time to prepare the lightweight concrete.
In the invention, the ceramsite, the perlite, the sulphoaluminate cement, the polyvinyl alcohol and the polypropylene fiber with the formula ratio are weighed firstly, then mixed, and then water is added for mixing after uniform mixing, thus preparing the lightweight concrete. The preparation method of the lightweight concrete provided by the invention is simple and rapid to operate.
As a further technical solution, the first mixing means includes but is not limited to stirring, or other means suitable for solid matter mixing known to those skilled in the art.
The stirring time is 0.5-2 min, for example, but not limited to, 0.5min, 0.7min, 0.9min, 1.1min, 1.3min, 1.5min, 1.7min, 1.9min or 2min, preferably 1 min. The stirring time influences the mixing degree of the materials, and the raw materials are stirred for 0.5-2 min to be fully mixed.
In the invention, through further optimizing and adjusting the stirring time, all materials are fully and uniformly mixed, and the time is saved.
As a further technical solution, the second mixing means includes, but is not limited to, stirring, or other means suitable for solid matter mixing known to those skilled in the art.
The stirring time is 0.5-2 min, for example, but not limited to, 0.5min, 0.7min, 0.9min, 1.1min, 1.3min, 1.5min, 1.7min, 1.9min or 2min, preferably 1 min. In the invention, the lightweight concrete is prepared by adding water and stirring after the raw materials are fully and uniformly mixed.
In the invention, the quality of the concrete is uniform through further optimizing and adjusting the stirring time, which is beneficial to improving the quality of the concrete.
In a third aspect, the invention provides a light concrete for use in the field of construction.
The concrete provided by the invention is light in weight, good in heat preservation performance and frost resistance, not easy to break and low in cost, and can be used in the field of buildings.
In a fourth aspect, the present invention provides a building material, which is mainly prepared from lightweight concrete.
The concrete of the invention has light weight, good heat preservation performance and frost resistance, difficult fracture and low cost. The concrete can be used as a raw material or can be matched with other raw materials to prepare building materials. Because the building material takes the lightweight concrete as a raw material, the building material also has the advantages of light weight, good heat preservation performance, good frost resistance and the like.
The invention is further illustrated by the following specific examples and comparative examples, but it should be understood that these examples are for purposes of illustration only and are not to be construed as limiting the invention in any way.
Example 1
The lightweight concrete comprises the following components:
150kg of ceramsite, 90kg of perlite, 260kg of sulphoaluminate cement, 1kg of polyvinyl alcohol, 0.8kg of polypropylene fiber and 170kg of water, wherein the diameter of the ceramsite is 2-12 mm, and the particle size of the perlite is 10-40 meshes.
The preparation method comprises the following steps:
firstly, 150kg of ceramsite, 90kg of perlite, 260kg of sulphoaluminate cement, 1kg of polyvinyl alcohol and 0.8kg of polypropylene fiber are mixed and stirred for 0.5min, then 170kg of water is added and stirred for 0.5min, and the concrete is prepared after the stirring is finished.
Example 2
The lightweight concrete comprises the following components:
160kg of ceramsite, 82kg of perlite, 275kg of sulphoaluminate cement, 0.8kg of polyvinyl alcohol, 0.9kg of polypropylene fiber and 160kg of water, wherein the diameter of the ceramsite is 2-12 mm, and the particle size of the perlite is 20-30 meshes.
The preparation method comprises the following steps:
firstly, 160kg of ceramsite, 82kg of perlite, 275kg of sulphoaluminate cement, 0.8kg of polyvinyl alcohol and 0.9kg of polypropylene fiber are mixed and stirred for 1min, then 160kg of water is added and stirred for 1min, and the concrete is prepared after the stirring is finished.
Example 3
The lightweight concrete comprises the following components:
180kg of ceramsite, 75kg of perlite, 290kg of sulphoaluminate cement, 0.7kg of polyvinyl alcohol, 1kg of polypropylene fiber and 150kg of water, wherein the diameter of the ceramsite is 5-10 mm, and the particle size of the perlite is 20-30 meshes.
The preparation method comprises the following steps:
firstly, 180kg of ceramsite, 75kg of perlite, 290kg of sulphoaluminate cement, 0.7kg of polyvinyl alcohol and 1kg of polypropylene fiber are mixed and stirred for 1min, then 150kg of water is added and stirred for 1min, and the concrete is prepared after the stirring is finished.
Example 4
The lightweight concrete comprises the following components:
200kg of ceramsite, 68kg of perlite, 305kg of sulphoaluminate cement, 0.6kg of polyvinyl alcohol, 1.1kg of polypropylene fiber and 140kg of water, wherein the diameter of the ceramsite is 2-12 mm, and the particle size of the perlite is 20-30 meshes.
The preparation method comprises the following steps:
firstly, 200kg of ceramsite, 68kg of perlite, 305kg of sulphoaluminate cement, 0.6kg of polyvinyl alcohol and 1.1kg of polypropylene fiber are mixed and stirred for 1.5min, then 140kg of water is added and stirred for 1.5min, and the concrete is prepared after the stirring is finished.
Example 5
The lightweight concrete comprises the following components:
210kg of ceramsite, 60kg of perlite, 320kg of sulphoaluminate cement, 0.4kg of polyvinyl alcohol, 1.2kg of polypropylene fiber and 130kg of water, wherein the diameter of the ceramsite is 2-12 mm, and the particle size of the perlite is 10-40 meshes.
The preparation method comprises the following steps:
firstly, 210kg of ceramsite, 60kg of perlite, 320kg of sulphoaluminate cement, 0.4kg of polyvinyl alcohol and 1.2kg of polypropylene fiber are mixed and stirred for 2min, then 130kg of water is added and stirred for 2min, and the concrete is prepared after the stirring is finished.
Example 6
A lightweight concrete, which is different from the concrete of example 3 in that the particle size of the ceramsite is more than 12 mm.
Example 7
A lightweight concrete, which is different from example 3 in that the particle size of the ceramsite is 2mm or less.
Example 8
A lightweight concrete, which is different from example 3 in that the particle size of perlite is 10 mesh or more.
Example 9
A lightweight concrete, which is different from example 3 in that the particle size of perlite is 40 mesh or less.
Comparative example 1
A lightweight concrete prepared mainly from perlite and cement, comprising the following components: 85kg of perlite and 290kg of cement.
Comparative example 2
A concrete comprising the following components:
50kg of ceramsite, 50kg of perlite, 100kg of sulphoaluminate cement, 2kg of polyvinyl alcohol, 0.4kg of polypropylene fiber and 200kg of water, wherein the diameter of the ceramsite is 5-10 mm, and the particle size of the perlite is 20-30 meshes.
The preparation method comprises the following steps:
firstly, 50kg of ceramsite, 50kg of perlite, 100kg of sulphoaluminate cement, 2kg of polyvinyl alcohol and 0.4kg of polypropylene fiber are mixed and stirred for 2min, then 200kg of water is added and stirred for 2min, and the concrete is prepared after the stirring is finished.
Comparative example 3
A concrete, differing from example 3 in that no polyvinyl alcohol was added.
Comparative example 4
A concrete, differing from example 3 in that no polypropylene fiber was added.
Test example 1
Concrete slabs were prepared from the concrete of examples 1 to 9 and comparative examples 1 to 4, and the compression resistance, water absorption and density of the concrete slabs were measured, respectively, and the results are shown in table 1.
Table 1 results of performance tests of concrete panels of examples 1 to 9 and comparative examples 1 to 4
As can be seen from Table 1, the concrete of example 3 had a compressive strength of 20MPa, a water absorption of 12%, a sound insulation of 40 dB, a thermal conductivity of 0.08W/(m.k), and a density of 1000kg/m3And the performance is optimal. Among them, example 6 has lower strength and inferior fluidity than example 3; example 7 is heavy and has a poor sound insulation effect compared to example 3; example 8 has lower strength than example 3; example 9 was heavier and had a lower heat retention effect than example 3.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The lightweight concrete is characterized by comprising the following components in parts by weight:
150-210 parts of ceramsite, 60-90 parts of perlite, 260-320 parts of sulphoaluminate cement, 0.4-1 part of polyvinyl alcohol, 0.8-1.2 parts of polypropylene fiber and 130-170 parts of water.
2. The lightweight concrete according to claim 1, which comprises the following components in parts by weight:
160-200 parts of ceramsite, 68-82 parts of perlite, 275-305 parts of sulphoaluminate cement, 0.6-0.8 part of polyvinyl alcohol, 0.9-1.1 part of polypropylene fiber and 140-160 parts of water.
3. The lightweight concrete according to claim 1, which comprises the following components in parts by weight:
180 parts of ceramsite, 75 parts of perlite, 290 parts of sulphoaluminate cement, 0.7 part of polyvinyl alcohol, 1 part of polypropylene fiber and 150 parts of water.
4. The lightweight concrete according to claim 1, wherein the ceramsite has a particle size of 2-12 mm, preferably 5-10 mm.
5. The lightweight concrete according to claim 4, wherein the perlite has a particle size of 10 to 40 mesh, preferably 20 to 30 mesh.
6. The method for producing lightweight concrete according to any one of claims 1 to 5, comprising the steps of:
mixing the ceramsite, the perlite, the sulphoaluminate cement, the polyvinyl alcohol and the polypropylene fiber according to the formula ratio for the first time, and then adding water for mixing for the second time to prepare the lightweight concrete.
7. The method of claim 6, wherein the first mixing comprises stirring;
the stirring time is 0.5-2 min, preferably 1 min.
8. The method of claim 6, wherein the second mixing comprises stirring;
the stirring time is 0.5-2 min, preferably 1 min.
9. Use of the lightweight concrete according to any one of claims 1 to 5, or of the lightweight concrete obtained by the method according to any one of claims 6 to 8, in the construction sector.
10. A building material, characterized in that it is prepared mainly from the lightweight concrete according to any one of claims 1 to 5, or the lightweight concrete prepared by the preparation method according to any one of claims 6 to 8.
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| CN110357532A (en) * | 2019-07-29 | 2019-10-22 | 北京固瑞恩科技有限公司 | A kind of lightweight polymeric cement mortar with waterproof and anticorrosion function |
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| CN101041578A (en) * | 2007-03-06 | 2007-09-26 | 刘泳霞 | Light-weight aggregate concrete and formwork wall member produced therefrom |
| CN102747789A (en) * | 2012-07-12 | 2012-10-24 | 西安建筑科技大学 | Explosion-proof heat-preservation multifunctional sheet material of foaming concrete sandwich and preparation method of material |
| CN105272352A (en) * | 2014-06-18 | 2016-01-27 | 西北民族大学 | Lightweight wall special-purpose cell concrete, and production method thereof |
| CN108892451A (en) * | 2018-08-02 | 2018-11-27 | 广东金意陶陶瓷集团有限公司 | Lightweight concrete, lightweight precast concrete part and preparation method thereof and construction material |
| CN110357532A (en) * | 2019-07-29 | 2019-10-22 | 北京固瑞恩科技有限公司 | A kind of lightweight polymeric cement mortar with waterproof and anticorrosion function |
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