CN114057452A - External wall thermal insulation material and preparation method and application thereof - Google Patents
External wall thermal insulation material and preparation method and application thereof Download PDFInfo
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- CN114057452A CN114057452A CN202210045932.2A CN202210045932A CN114057452A CN 114057452 A CN114057452 A CN 114057452A CN 202210045932 A CN202210045932 A CN 202210045932A CN 114057452 A CN114057452 A CN 114057452A
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
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- Organic Chemistry (AREA)
- Building Environments (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the field of heat insulation materials, and particularly discloses an external wall heat insulation material and a preparation method and application thereof; the external wall heat-insulating material comprises a first component and a second component; the first component comprises the following raw materials in parts by weight: 20-50 parts of Portland cement, 10-30 parts of fly ash, 15-35 parts of styrene-acrylic emulsion, 1-3 parts of film-forming additive and 15-30 parts of water; the second component comprises the following raw materials in parts by weight: 25-45 parts of expanded perlite, 20-30 parts of bentonite, 5-15 parts of combined heat-insulating fiber, 15-25 parts of composite material, 2-5 parts of pigment, 5-10 parts of water repellent and 15-25 parts of water; the composite material comprises nano silicon dioxide, vitrified micro bubbles and floating beads; the thermal insulation material for the external wall has good thermal insulation performance.
Description
Technical Field
The application relates to the field of heat insulation materials, in particular to an external wall heat insulation material and a preparation method and application thereof.
Background
At present, 30-50% of energy loss of a building is lost through a roof and an enclosure structure, so that the key of building energy conservation is to effectively perform heat preservation and heat insulation of the roof and the enclosure structure. The heat insulation materials used for the heat insulation of the current wall body mainly comprise two types: the composite material is an organic heat-insulating material and an inorganic heat-insulating material respectively, wherein the organic heat-insulating material is mainly an organic foam board, has a good heat-insulating effect, but has the problems of complex construction procedures and easy occurrence of fire; the inorganic heat-insulating material has strong caking property, good environmental protection and weather resistance and simple construction process.
In view of the above-mentioned related technologies, the inventor considers that inorganic thermal insulation materials have the defects of large volume weight and poor thermal insulation performance, and the thermal insulation effect is inferior to that of organic thermal insulation materials, so that the thermal insulation performance of inorganic thermal insulation materials needs to be improved to meet the requirements of indoor buildings of being warm in winter and cool in summer.
Disclosure of Invention
In order to improve the heat insulation performance of the heat insulation material, the application provides an external wall heat insulation material and a preparation method and application thereof.
In a first aspect, the application provides an external wall insulation material, which adopts the following technical scheme:
an external wall thermal insulation material comprises a first component and a second component; the first component comprises the following raw materials in parts by weight: 20-50 parts of Portland cement, 10-30 parts of fly ash, 15-35 parts of styrene-acrylic emulsion, 1-3 parts of film-forming additive and 15-30 parts of water; the second component comprises the following raw materials in parts by weight: 25-45 parts of expanded perlite, 20-30 parts of bentonite, 5-15 parts of combined heat-insulating fiber, 15-25 parts of composite material, 2-5 parts of pigment, 5-10 parts of water repellent and 15-25 parts of water; the composite material comprises nano silicon dioxide, vitrified micro bubbles and floating beads.
By adopting the technical scheme, the composite material is added into the second component in the preparation process of the external wall thermal insulation material, so that the thermal insulation performance of the external wall thermal insulation material is effectively improved. The nano silicon dioxide in the composite material is amorphous micro particles, chemical bonds of the micro particles are combined with each other to form a very long particle closed chain, and the particle closed chain can form a spiral conduction path, so that the heat insulation effect is achieved; the vitrified micro bubbles are an environment-friendly novel inorganic light heat-insulating material, and have the characteristics of no combustion, high strength, good blending property and long service life besides the excellent performances of light weight, heat preservation, heat insulation and fire prevention; the floating beads are thin and hollow, the cavity is semi-vacuum, and only trace gas N is contained2、H2And CO2The floating beads are light in weight and excellent in heat preservation and insulation because the heat conduction is extremely slow and tiny; the composite material consisting of the nano silicon dioxide, the vitrified micro bubbles and the floating beads is added into the external wall heat-insulating materialIn addition, the heat insulation performance of the building outer wall is effectively improved, and the building indoor space has the characteristics of being warm in winter and cool in summer.
Preferably, the first component comprises the following raw materials in parts by weight: 30-40 parts of Portland cement, 15-25 parts of fly ash, 20-30 parts of styrene-acrylic emulsion, 2-2.5 parts of film-forming additive and 18-22 parts of water; the second component comprises the following raw materials in parts by weight: 30-40 parts of expanded perlite, 24-28 parts of bentonite, 8-12 parts of combined heat-insulating fiber, 18-22 parts of composite material, 3-4 parts of pigment, 6-8 parts of water repellent and 18-22 parts of water.
By adopting the technical scheme, the application optimizes the consumption of the raw materials of the external wall thermal insulation material, so that the prepared external wall thermal insulation material has good thermal insulation performance when the consumption of the raw materials of the external wall thermal insulation material is in the range.
Preferably, the composite material comprises the following raw materials in parts by weight: 5-15 parts of nano silicon dioxide, 20-30 parts of vitrified micro bubbles and 25-35 parts of floating beads.
By adopting the technical scheme, the composite material is prepared by proportioning the raw material amounts, and the obtained external wall thermal insulation material has good thermal insulation performance, wherein the thermal conductivity is 0.055W/(m.K), the water absorption is 3.9%, the compressive strength is 0.58 MPa, and the combustion performance is A1.
Preferably, the average particle size of the floating beads is 150-250 μm.
Through adopting above-mentioned technical scheme, this application makes the thermal insulation performance of the outer wall insulation material who makes better through the granularity size of restriction floating bead.
Preferably, the combined heat-preservation fibers comprise sepiolite fibers, basalt fibers and aluminum silicate fibers, and the combined heat-preservation fibers are added in the following weight parts: 20-30 parts of aluminum silicate fiber, 35-45 parts of basalt fiber and 15-20 parts of sepiolite fiber.
By adopting the technical scheme, the sepiolite fibers, the basalt fibers and the aluminum silicate fibers are compounded according to a certain proportion to obtain the combined heat-insulation fibers, and the aluminum silicate fibers have the characteristics of light weight, high temperature resistance, good thermal stability and low heat conductivity, so that the combined heat-insulation fibers have excellent heat-insulation performance; the basalt fiber is a novel inorganic environment-friendly green high-performance fiber material and is composed of oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, iron oxide, titanium dioxide and the like, and the basalt fiber not only has better mechanical strength, but also resists high temperature, so that the basalt fiber is a better fireproof heat-insulating material; the sepiolite fibers can be dispersed in the heat insulation material in a disordered manner, play a role in supporting a skeleton and increase the compression strength, the bending strength and the bonding strength of the heat insulation material.
Preferably, the film forming aid is propylene glycol butyl ether or propylene glycol methyl ether acetate.
By adopting the technical scheme, the propylene glycol butyl ether and the propylene glycol methyl ether acetate can promote the fluidity of the external wall insulation material and improve the coalescence performance, so that the external wall insulation material is easy to coat on the outer side of a building, thereby playing a role in heat preservation.
In a second aspect, the present application provides a method for preparing an exterior wall insulation material, comprising the following steps:
1) uniformly mixing portland cement, fly ash, styrene-acrylic emulsion, a film-forming additive and water to obtain a first component;
2) and uniformly mixing the expanded perlite, the bentonite, the combined heat-insulating fiber, the composite material, the pigment, the water repellent and water to obtain a second component.
By adopting the technical scheme, the first component and the second component are prepared, the first component can fill up fine cracks of the outer wall, and the second component mostly adopts raw materials with hollow structures, so that the heat insulation performance of the applied heat insulation material is improved.
In a third aspect, the present application provides an application of an exterior wall thermal insulation material, which comprises the following steps:
1) coating the first component on the surface of the outer wall, wherein the coating thickness is 6-10 mm;
2) and brushing the second component to the surface of the first component, wherein the brushing thickness is 25-40 mm.
By adopting the technical scheme, the first component and the second component are sequentially coated on the surface of the building outer wall, and the coating thickness is within the value range, so that the heat insulation performance of the outer wall heat insulation material is not affected.
In summary, the present application has the following beneficial effects:
1. the composite material is added into the second component in the preparation process of the external wall thermal insulation material, so that the thermal insulation performance of the external wall thermal insulation material is effectively improved. The nano silicon dioxide in the composite material is amorphous micro particles, chemical bonds of the micro particles are combined with each other to form a very long particle closed chain, and the particle closed chain can form a spiral conduction path, so that the heat insulation effect is achieved; the vitrified micro bubbles are an environment-friendly novel inorganic light heat-insulating material, and have the characteristics of no combustion, high strength, good blending property and long service life besides the excellent performances of light weight, heat preservation, heat insulation and fire prevention; the floating beads are thin and hollow, the cavity is semi-vacuum, and only trace gas N is contained2、H2And CO2The floating beads are light in weight and excellent in heat preservation and insulation because the heat conduction is extremely slow and tiny; according to the application, the composite material consisting of the nano silicon dioxide, the vitrified micro bubbles and the floating beads is added into the external wall heat insulation material, so that the heat insulation performance of the external wall of the building is effectively improved, and the indoor space of the building has the characteristics of being warm in winter and cool in summer.
2. In the application, sepiolite fibers, basalt fibers and aluminum silicate fibers are compounded according to a certain proportion to obtain combined heat-insulation fibers, and the aluminum silicate fibers have the characteristics of light weight, high temperature resistance, good thermal stability and low thermal conductivity, so that the combined heat-insulation fibers have excellent heat-insulation performance; the basalt fiber is a novel inorganic environment-friendly green high-performance fiber material and is composed of oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, iron oxide, titanium dioxide and the like, and the basalt fiber not only has better mechanical strength, but also resists high temperature, so that the basalt fiber is a better fireproof heat-insulating material; the sepiolite fibers can be dispersed in the heat insulation material in a disordered manner, play a role in supporting a skeleton and increase the compression strength, the bending strength and the bonding strength of the heat insulation material.
3. The external wall thermal insulation material prepared by the method is subjected to performance detection, and the thermal conductivity coefficient is 0.051W/(m.K), the water absorption is 4.2%, the compressive strength is 0.62MPa, and the combustion performance is A1.
Detailed Description
The present application will be described in further detail with reference to examples.
Raw materials
Portland cement: the manufacturer is Beijing rui si ett building materials Co.Ltd; fly ash: the manufacturer is Hebei Yongsheng refractory Co Ltd; expanded perlite: the manufacturer is Changchun city Shuangyang Xinyuan mining company Limited; bentonite: the manufacturer is Beijing national Tech Co Ltd;
styrene-acrylic emulsion: the manufacturer is Beijing Zhongyuyou Lianzhi Co Ltd;
nano silicon dioxide: the manufacturer is Shanghai Chaowei nanometer technology Co., Ltd; vitrification of the micro-beads: the manufacturer is Xinyang city cloud building materials Co., Ltd; floating beads: the manufacturer is Hebei Hechangguang mineral products Co.Ltd;
sepiolite fibers: the manufacturer is Hebeike Xu building materials Co., Ltd; basalt fiber: the manufacturer is Shandong Taicheng fiber Co Ltd; aluminum silicate fiber: the manufacturer is Hebei Luyang thermal insulation materials Co., Ltd;
propylene glycol butyl ether: the manufacturer is Shandongten Yu chemical Co., Ltd; propylene glycol methyl ether acetate: the manufacturer is Shandong Taixi chemical company;
polyvinyl alcohol water-based water repellent: the manufacturer is Beijing Wan Tummin technologies Co.
Preparation example
Preparation examples 1 to 3
The composite materials of preparation examples 1 to 3, the raw materials and the amounts of the raw materials are shown in table 1, and the preparation steps are as follows:
weighing the raw materials according to the dosage in the table 1, and then uniformly stirring the raw materials to obtain the composite material.
TABLE 1 preparation of composites of examples 1-3 raw materials and amounts (kg) of raw materials
| Preparation example 1 | Preparation example 2 | Preparation example 3 | |
| Nano silicon dioxide | 5 | 10 | 15 |
| Vitrified micro bubbles | 40 | 30 | 20 |
| Floating bead | 25 | 30 | 35 |
Preparation examples 4 to 6
The combined heat-insulating fiber of preparation examples 4-6 has the following raw materials and the use amounts of the raw materials shown in table 2:
weighing the raw materials according to the dosage in the table 2, and then uniformly stirring the raw materials to obtain the combined heat-insulating fiber.
TABLE 2 preparation examples 4-6 of the composite thermal insulation fiber raw materials and the amounts (kg) of the raw materials
| Preparation example 4 | Preparation example 5 | Preparation example 6 | |
| Aluminium silicate fibre | 20 | 25 | 30 |
| Basalt fiber | 45 | 40 | 35 |
| Sepiolite fiber | 15 | 18 | 20 |
Examples
Examples 1 to 4
The exterior wall thermal insulation material of examples 1 to 4, the raw materials and the amounts of the raw materials are shown in table 3, and the preparation steps are as follows:
1) uniformly mixing portland cement, fly ash, styrene-acrylic emulsion, a film-forming additive and water to obtain a first component;
2) and uniformly mixing the expanded perlite, the bentonite, the combined heat-insulating fiber, the composite material, the pigment, the water repellent and water to obtain a second component.
Wherein the composite material is from preparation example 1, the composite fiber is from preparation example 4, the film-forming assistant is propylene glycol butyl ether, and the water repellent is a polyvinyl alcohol water-based water repellent.
TABLE 3 raw materials and amounts (kg) of raw materials of examples 1-4
| Example 1 | Example 2 | Example 3 | Example 4 | |
| Portland cement | 20 | 30 | 40 | 50 |
| Fly ash | 30 | 25 | 15 | 10 |
| Styrene-acrylic emulsion | 15 | 20 | 30 | 35 |
| Film forming aid | 1 | 2 | 2.5 | 3 |
| Water (W) | 25 | 22 | 18 | 15 |
| Expanded perlite | 25 | 30 | 40 | 45 |
| Bentonite clay | 30 | 28 | 24 | 20 |
| Combined heat-insulating fiber | 5 | 8 | 12 | 15 |
| Composite material | 15 | 15 | 15 | 15 |
| Colorant | 5 | 4 | 3 | 2 |
| Water repellent | 5 | 6 | 8 | 10 |
| Water (W) | 25 | 22 | 18 | 15 |
Wherein the composite material is from preparation example 1, the combined heat-insulating fiber is from preparation example 4, the average particle size of the floating beads is 150 μm, the film-forming assistant is propylene glycol butyl ether, and the water repellent is a polyvinyl alcohol water-based water repellent.
Example 5
An exterior wall thermal insulation material is different from the exterior wall thermal insulation material in the embodiment 3 in that the added composite material is obtained from the preparation example 2, and the rest steps are the same as the embodiment 3.
Example 6
An exterior wall thermal insulation material is different from the exterior wall thermal insulation material in the embodiment 3 in that the added composite material is obtained from the preparation embodiment 3, and the rest steps are the same as the embodiment 3.
Example 7
An exterior wall thermal insulation material is different from the material in the embodiment 5 in that the average particle size of the added floating beads is 200 μm, and the rest steps are the same as the embodiment 5.
Example 8
An exterior wall thermal insulation material is different from the exterior wall thermal insulation material in the embodiment 5 in that the average particle size of the added floating beads is 250 mu m, and the rest steps are the same as the embodiment 5.
Example 9
An exterior wall thermal insulation material is different from the exterior wall thermal insulation material in the embodiment 8 in that the added amount of the added composite material is 18kg, and the rest steps are the same as the embodiment 8.
Example 10
An exterior wall thermal insulation material is different from the exterior wall thermal insulation material in the embodiment 8 in that the added amount of the added composite material is 22kg, and the rest steps are the same as the embodiment 8.
Example 11
An exterior wall thermal insulation material is different from the exterior wall thermal insulation material in the embodiment 8 in that the added amount of the added composite material is 25kg, and the rest steps are the same as the embodiment 8.
Example 12
An exterior wall thermal insulation material is different from the exterior wall thermal insulation material in the embodiment 11 in that the added combined thermal insulation fiber comes from the preparation example 5, and the rest steps are the same as the embodiment 11.
Example 13
An exterior wall thermal insulation material is different from the exterior wall thermal insulation material in the embodiment 11 in that the added combined thermal insulation fiber comes from the preparation example 6, and the rest steps are the same as the embodiment 11.
Example 14
An exterior wall thermal insulation material is different from that of the embodiment 12 in that a film forming aid added is propylene glycol methyl ether acetate, and the rest steps are the same as those of the embodiment 12.
Comparative example
Comparative example 1
The exterior wall thermal insulation material is different from the exterior wall thermal insulation material in the embodiment 1 in that the addition amount of nano silicon dioxide in the composite material is 0, and the rest steps are the same as those in the embodiment 1.
Comparative example 2
The exterior wall thermal insulation material is different from the exterior wall thermal insulation material in the embodiment 1 in that the addition amount of the vitrified micro bubbles in the composite material is 0, and the rest steps are the same as the embodiment 1.
Comparative example 3
An exterior wall thermal insulation material is different from the exterior wall thermal insulation material in the embodiment 1 in that the addition amount of floating beads in a composite material is 0, and the rest steps are the same as the embodiment 1.
Comparative example 4
An exterior wall thermal insulation material is different from the embodiment 1 in that the addition amount of alumina silicate fiber in the combined thermal insulation fiber is 0, and the rest steps are the same as the embodiment 1.
Comparative example 5
An exterior wall thermal insulation material is different from the embodiment 1 in that the addition amount of basalt fibers in combined thermal insulation fibers is 0, and the rest steps are the same as those in the embodiment 1.
Comparative example 6
The difference between the external wall thermal insulation material and the embodiment 1 is that the sepiolite fiber addition amount in the combined thermal insulation fiber is 0, and the rest steps are the same as the embodiment 1.
Application example
Application examples 1 to 20
The application of the external wall thermal insulation material of application examples 1-20 comprises the following application steps:
the external wall heat insulation materials prepared in the embodiments 1-14 and the comparative examples 1-6 are used on the surface of an external wall of a building, the first component is coated on the surface of the external wall, and the coating thickness is 8 mm; and brushing the second component to the surface of the first mixture, wherein the brushing thickness is 30 mm.
Performance test
Detection method/test method
The exterior wall insulation materials of the application examples 1 to 20 were tested according to the following test methods, and the test results are shown in table 4.
And (3) testing the heat conductivity coefficient: according to the test of a heat conductivity meter, the smaller the heat conductivity coefficient is, the better the heat preservation performance is.
Water absorption test: the test was carried out according to JGJ/T70-2009 test standard.
And (3) testing the compressive strength: the test was carried out according to JGJ/T70-2009 test standard.
And (3) testing the combustion performance: the test was performed according to GB/8624 and 2012 test standards.
TABLE 4 test results of application examples 1 to 20
| Thermal conductivity (W/(m.K)) | Water absorption/%) | Compressive strength (MPa) | Combustion performance | |
| Application example 1 | 0.068 | 3.1 | 0.46 | A2 |
| Application example 2 | 0.067 | 3.1 | 0.46 | A2 |
| Application example 3 | 0.065 | 3.3 | 0.48 | A2 |
| Application example 4 | 0.066 | 3.2 | 0.46 | A2 |
| Application example 5 | 0.061 | 3.6 | 0.51 | A2 |
| Application example 6 | 0.063 | 3.4 | 0.49 | A2 |
| Application example 7 | 0.062 | 3.7 | 0.54 | A2 |
| Application example 8 | 0.059 | 3.7 | 0.53 | A1 |
| Application example 9 | 0.058 | 3.8 | 0.56 | A1 |
| Application example 10 | 0.057 | 3.7 | 0.57 | A1 |
| Application example 11 | 0.055 | 3.9 | 0.58 | A1 |
| Application example 12 | 0.052 | 4.1 | 0.61 | A1 |
| Application example 13 | 0.053 | 3.9 | 0.60 | A1 |
| Application example 14 | 0.051 | 4.2 | 0.62 | A1 |
| Application example 15 | 0.072 | 2.8 | 0.31 | B |
| Application example 16 | 0.071 | 2.8 | 0.33 | B |
| Application example 17 | 0.074 | 2.7 | 0.31 | B |
| Application example 18 | 0.063 | 3.1 | 0.39 | B |
| Application example 19 | 0.066 | 3.4 | 0.41 | B |
| Application example 20 | 0.065 | 3.3 | 0.39 | B |
As can be seen from the detection data in Table 4, the thermal insulation material for the external wall prepared by the method effectively improves the thermal insulation performance of the thermal insulation material for the external wall by adding the composite material and the combined thermal insulation fiber in the preparation process of the thermal insulation material for the external wall.
According to the detection data of application examples 3 and 5-6, the composite material of preparation example 2 is excellent in proportion, and the prepared external wall thermal insulation material is low in heat conductivity coefficient, good in water absorption, compressive strength and combustion performance and good in thermal insulation performance.
According to the detection data of application examples 5 and 7-8, the larger the average particle size of the floating beads is, the smaller the thermal conductivity coefficient of the composite material prepared by the floating beads added into the external wall thermal insulation material is, the better the thermal insulation performance of the external wall thermal insulation material is, and meanwhile, the compressive strength of the external wall thermal insulation material is also improved.
By combining the detection data of application example 8 and application examples 9-11, it can be seen that the thermal conductivity of the exterior wall thermal insulation material gradually decreases with the increase of the addition amount of the composite material, which indicates that the thermal insulation performance of the exterior wall thermal insulation material gradually increases, and when the addition amount of the composite material is 25kg, the thermal conductivity is 0.055W/(m.K), the water absorption is 3.9%, the compressive strength is 0.58 MPa, and the combustion performance is A1.
And the detection data of the application examples 15-17 are combined, so that when the addition amount of one of the nano-silica, the vitrified micro bubbles and the floating beads is 0, the measured data are poorer than those of the nano-silica, the vitrified micro bubbles and the floating beads which are simultaneously used, and the nano-silica, the vitrified micro bubbles and the floating beads have a synergistic effect on improving the heat insulation performance of the external wall heat insulation material.
It can be seen by combining the detection data of application example 11 and application examples 12-13 that the proportion of the combined thermal insulation fiber of preparation example 5 is relatively good, and the thermal conductivity coefficient of the exterior wall thermal insulation material prepared from the combined thermal insulation fiber of preparation example 5 is relatively low, and the exterior wall thermal insulation material has relatively good water absorption, compressive strength and combustion performance and relatively good thermal insulation performance.
The combination of the detection data of the application examples 18-20 shows that when the addition amount of one of the aluminum silicate fiber, the basalt fiber and the sepiolite fiber is 0, the measured data are poorer than those of the aluminum silicate fiber, the basalt fiber and the sepiolite fiber which are simultaneously used, and the synergistic effect of the aluminum silicate fiber, the basalt fiber and the sepiolite fiber on the improvement of the heat insulation performance of the external wall heat insulation material is demonstrated.
By combining the detection data of application examples 12 and 14, it can be seen that when the film-forming aid of the insulation material is propylene glycol methyl ether acetate, the prepared insulation material for the exterior wall has the advantages of low heat conductivity coefficient, good water absorption, compressive strength and combustion performance, and good insulation performance.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. An external wall insulation material is characterized in that: the external wall heat-insulating material comprises a first component and a second component; the first component comprises the following raw materials in parts by weight: 20-50 parts of Portland cement, 10-30 parts of fly ash, 15-35 parts of styrene-acrylic emulsion, 1-3 parts of film-forming additive and 15-30 parts of water; the second component comprises the following raw materials in parts by weight: 25-45 parts of expanded perlite, 20-30 parts of bentonite, 5-15 parts of combined heat-insulating fiber, 15-25 parts of composite material, 2-5 parts of pigment, 5-10 parts of water repellent and 15-25 parts of water; the composite material comprises nano silicon dioxide, vitrified micro bubbles and floating beads.
2. The exterior wall insulation material of claim 1, wherein: the first component comprises the following raw materials in parts by weight: 30-40 parts of Portland cement, 15-25 parts of fly ash, 20-30 parts of styrene-acrylic emulsion, 2-2.5 parts of film-forming additive and 18-22 parts of water; the second component comprises the following raw materials in parts by weight: 30-40 parts of expanded perlite, 24-28 parts of bentonite, 8-12 parts of combined heat-insulating fiber, 18-22 parts of composite material, 3-4 parts of pigment, 6-8 parts of water repellent and 18-22 parts of water.
3. The exterior wall insulation material of claim 1, wherein: the composite material comprises the following raw materials in parts by weight: 5-15 parts of nano silicon dioxide, 20-30 parts of vitrified micro bubbles and 25-35 parts of floating beads.
4. The exterior wall insulation material of claim 3, wherein: the average particle size of the floating beads is 150-250 mu m.
5. The exterior wall insulation material of claim 1, wherein: the combined heat-insulating fiber comprises sepiolite fiber, basalt fiber and aluminum silicate fiber, and is added in the following parts by weight: 20-30 parts of aluminum silicate fiber, 35-45 parts of basalt fiber and 15-20 parts of sepiolite fiber.
6. The exterior wall insulation material of claim 1, wherein: the film-forming assistant is propylene glycol butyl ether or propylene glycol methyl ether acetate.
7. The exterior wall insulation material of claim 1, wherein: the water repellent is a polyvinyl alcohol water-based water repellent.
8. A method for preparing an exterior wall thermal insulation material according to any one of claims 1 to 7, which is characterized in that: which comprises the following steps:
1) uniformly mixing portland cement, fly ash, styrene-acrylic emulsion, a film-forming additive and water to obtain a first component;
2) and uniformly mixing the expanded perlite, the bentonite, the combined heat-insulating fiber, the composite material, the pigment, the water repellent and water to obtain a second component.
9. The use of the exterior wall insulation material of any one of claims 1 to 7, wherein: which comprises the following steps:
1) coating the first component on the surface of the outer wall, wherein the coating thickness is 6-10 mm;
2) and brushing the second component to the surface of the first component, wherein the brushing thickness is 25-40 mm.
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