Dry powder type wall thermal insulation material for old communities in cold regions and preparation method of dry powder type wall thermal insulation material
By developing a dry powder wall insulation material containing raw materials such as vitrified microbeads and cement, the problem of poor insulation performance in old communities in cold areas is solved, and efficient insulation effect and convenient construction process are achieved, energy consumption is reduced and living comfort is improved.
Patent Information
- Application Number
- CN202510031003.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2025-04-15
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The insulation performance of building walls in old communities in cold areas is generally poor, resulting in a large amount of indoor heat loss in winter, excessive energy consumption, and reduced residents' living comfort. When traditional wall insulation materials are used in old communities, there may be problems such as inconvenience in construction and poor adaptability to the original wall.
Develop a dry powder wall insulation material in old communities in cold areas. The raw materials include vitrified microbeads, cement, fly ash, redispersible latex powder, cellulose ether and hydrophobic agent, and the finished product is prepared through pretreatment and stirring processes.
The dry powder wall insulation material has excellent thermal insulation performance, which can effectively reduce energy consumption and reduce winter heating costs, and its thermal conductivity can be as low as 0.05-0.08W/(m·K). The material has good construction performance, is suitable for complex construction environments and different wall conditions, and has good bonding strength and flexibility, ensuring long-term stability of the insulation effect.
Smart Images
Figure CN119822697A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of thermal insulation material processing, and in particular to a dry powder type wall thermal insulation material for old residential areas in cold regions and a preparation method thereof. Background Art
[0002] Thermal insulation materials are generally lightweight, loose, porous, and fibrous materials. According to their composition, they can be divided into organic materials and inorganic materials. The former has better thermal insulation performance than the latter, but the latter is more durable than the former. Thermal conductivity is the main indicator to measure the performance of thermal insulation materials. The smaller the thermal conductivity, the less heat is transmitted through the material, and the better the thermal insulation performance. The thermal conductivity of the material is determined by the composition, internal structure, bulk density, etc. of the material, and also determines the average temperature during heat transfer and the moisture content of the material. Generally speaking, the lighter the bulk density, the smaller the thermal conductivity. Wall insulation materials (also known as inorganic active wall insulation materials) can save a lot of wall materials, improve wall insulation performance, save resources, and reduce environmental pollution. They are new materials that focus on internal and external wall insulation. Wall energy-saving insulation materials include organic, inorganic and composite materials. External wall insulation materials need to play the role of defending against external factors such as outdoor temperature, humidity changes, and solar radiation.
[0003] The thermal insulation performance of building walls in old residential areas in cold regions is generally poor, resulting in a large amount of indoor heat loss in winter, excessive energy consumption, and reduced living comfort for residents. Traditional wall insulation materials may have problems such as inconvenient construction and poor compatibility with the original walls when used in old residential areas. Dry powder wall insulation materials have the advantages of convenient storage and transportation and simple on-site construction. It is of great significance to develop a dry powder wall insulation material specifically for old residential areas in cold regions. Summary of the invention
[0004] 1. Technical issues to be resolved
[0005] In view of the shortcomings of the prior art, the present invention provides a dry powder wall insulation material for old residential areas in cold regions and a preparation method thereof, which solves the problem that the insulation performance of the existing building walls in old residential areas in cold regions is generally poor, resulting in a large amount of indoor heat loss in winter, excessive energy consumption, and reduced living comfort for residents. When traditional wall insulation materials are used in old residential areas, they may have problems such as inconvenient construction and poor compatibility with the original walls.
[0006] (II) Technical solution
[0007] To achieve the above objectives, the present invention is implemented through the following technical scheme: a dry powder wall insulation material for old communities in cold areas, the raw materials of which include, by weight: 30-40 parts of vitrified microspheres, 20-30 parts of cement, 15-25 parts of fly ash, 3-6 parts of redispersible latex powder, 0.5-1.5 parts of cellulose ether and 1-3 parts of water repellent.
[0008] Preferably, the raw materials include, by weight: 35 parts of vitrified microspheres, 25 parts of cement, 20 parts of fly ash, 5 parts of redispersible latex powder, 1 part of cellulose ether and 2 parts of water repellent.
[0009] Preferably, the raw materials include, by weight: 30 parts of vitrified microspheres, 20 parts of cement, 15 parts of fly ash, 3 parts of redispersible latex powder, 0.5 parts of cellulose ether and 1 part of water repellent.
[0010] Preferably, the raw materials include, by weight: 40 parts of vitrified microspheres, 30 parts of cement, 25 parts of fly ash, 6 parts of redispersible latex powder, 1.5 parts of cellulose ether and 3 parts of water repellent.
[0011] Preferably, the water repellent is one of hexamethyldisiloxane, sodium methyl silicate or polysiloxane.
[0012] The present invention also provides a method for preparing a dry powder wall insulation material for old residential areas in cold regions, which specifically comprises the following steps:
[0013] S1. First, pre-treat the vitrified microspheres to remove impurities and dust therein, and then place them in a drying device and dry them at 80-100° C. for 1-2 hours to make their water content less than 0.5%;
[0014] S2. According to the above weight parts, cement, fly ash, redispersible latex powder, cellulose ether, and water repellent are respectively put into a dry powder mixer, and stirred at a low speed of 100-150 rpm for 3-5 minutes to make the components preliminarily mixed;
[0015] S3. Add the dried vitrified microspheres into the mixer and stir at a high speed of 200-300 rpm for 8-12 minutes until all components are fully mixed to obtain a finished dry powder wall insulation material.
[0016] Preferably, the particle size of the vitrified microspheres in step S1 is 0.5-1.5 mm, and the vitrified microspheres are used as thermal insulation aggregate.
[0017] Preferably, the particle size of the redispersible latex powder in step S2 is 2-4 mm.
[0018] (III) Beneficial effects
[0019] The present invention provides a dry powder wall insulation material for old residential areas in cold regions and a preparation method thereof. Compared with the prior art, it has the following beneficial effects:
[0020] (1) The dry powder wall insulation material for old residential areas in cold regions and its preparation method. The dry powder wall insulation material of the present invention has excellent thermal insulation performance, which can effectively reduce the energy consumption of old residential buildings in cold regions and reduce winter heating costs. According to tests, its thermal conductivity can be as low as 0.05-0.08W / (m·K). The insulation material prepared by the present invention has good construction performance and can be used by simply adding water and stirring at the construction site. It can be used by various construction methods such as spraying and painting, which is convenient and fast and suitable for the complex construction environment and different wall conditions of old residential areas.
[0021] (2) The dry powder wall insulation material for old residential areas in cold regions and its preparation method. The insulation material of the present invention has good bonding strength and flexibility, can be firmly combined with brick-concrete walls, concrete walls, etc. in old residential areas, and is not easy to crack or fall off, thereby ensuring the long-term stability of the insulation effect. The hydrophobic property can effectively resist rain and snow erosion in cold regions, prevent the insulation layer from becoming damp and failing, and further extend the service life of the insulation material. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 The present invention is a flow chart of the preparation method. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0024] See also Figure 1 The embodiments of the present invention provide three technical solutions: a dry powder wall insulation material for old residential areas in cold regions and a preparation method thereof, specifically including the following embodiments:
[0025] Example 1: A dry powder wall insulation material for old communities in cold regions, the raw materials of which include, by weight: 35 parts of vitrified microspheres, 25 parts of cement, 20 parts of fly ash, 5 parts of redispersible latex powder, 1 part of cellulose ether and 2 parts of a water repellent, wherein the water repellent is one of hexamethyldisiloxane, sodium methyl silicate or polysiloxane.
[0026] The embodiment of the present invention also provides a method for preparing a dry powder wall insulation material for old residential areas in cold regions, which specifically includes the following steps:
[0027] S1. First, pre-treat the vitrified microspheres to remove impurities and dust therein, and then place them in a drying device and dry them at 80-100° C. for 1-2 hours to make their moisture content less than 0.5%. The particle size of the vitrified microspheres is 0.5-1.5 mm, and the vitrified microspheres are used as thermal insulation aggregates;
[0028] S2. According to the above weight parts, cement, fly ash, redispersible latex powder, cellulose ether, and water repellent are respectively put into a dry powder mixer, and stirred at a low speed of 100-150 rpm for 3-5 minutes to make the components preliminarily mixed and uniform. The particle size of the redispersible latex powder is 2-4 mm;
[0029] S3. Add the dried vitrified microspheres into the mixer and stir at a high speed of 200-300 rpm for 8-12 minutes until all components are fully mixed to obtain a finished dry powder wall insulation material.
[0030] Example 2: A dry powder wall insulation material for old communities in cold regions, the raw materials of which include, by weight: 30 parts of vitrified microspheres, 20 parts of cement, 15 parts of fly ash, 3 parts of redispersible latex powder, 0.5 parts of cellulose ether and 1 part of a water repellent, wherein the water repellent is one of hexamethyldisiloxane, sodium methyl silicate or polysiloxane.
[0031] The embodiment of the present invention also provides a method for preparing a dry powder wall insulation material for old residential areas in cold regions, which specifically includes the following steps:
[0032] S1. First, pre-treat the vitrified microspheres to remove impurities and dust therein, and then place them in a drying device and dry them at 80-100° C. for 1-2 hours to make their moisture content less than 0.5%. The particle size of the vitrified microspheres is 0.5-1.5 mm, and the vitrified microspheres are used as thermal insulation aggregates;
[0033] S2. According to the above weight parts, cement, fly ash, redispersible latex powder, cellulose ether, and water repellent are respectively put into a dry powder mixer, and stirred at a low speed of 100-150 rpm for 3-5 minutes to make the components preliminarily mixed and uniform. The particle size of the redispersible latex powder is 2-4 mm;
[0034] S3. Add the dried vitrified microspheres into the mixer and stir at a high speed of 200-300 rpm for 8-12 minutes until all components are fully mixed to obtain a finished dry powder wall insulation material.
[0035] Example 3: A dry powder wall insulation material for old communities in cold areas and a preparation method thereof, characterized in that the raw materials include, by weight: 40 parts of vitrified microspheres, 30 parts of cement, 25 parts of fly ash, 6 parts of redispersible latex powder, 1.5 parts of cellulose ether and 3 parts of a hydrophobic agent, wherein the hydrophobic agent is one of hexamethyldisiloxane, sodium methyl silicate or polysiloxane.
[0036] The embodiment of the present invention also provides a method for preparing a dry powder wall insulation material for old residential areas in cold regions, which specifically includes the following steps:
[0037] S1. First, pre-treat the vitrified microspheres to remove impurities and dust therein, and then place them in a drying device and dry them at 80-100° C. for 1-2 hours to make their moisture content less than 0.5%. The particle size of the vitrified microspheres is 0.5-1.5 mm, and the vitrified microspheres are used as thermal insulation aggregates;
[0038] S2. According to the above weight parts, cement, fly ash, redispersible latex powder, cellulose ether, and water repellent are respectively put into a dry powder mixer, and stirred at a low speed of 100-150 rpm for 3-5 minutes to make the components preliminarily mixed and uniform. The particle size of the redispersible latex powder is 2-4 mm;
[0039] S3. Add the dried vitrified microspheres into the mixer and stir at a high speed of 200-300 rpm for 8-12 minutes until all components are fully mixed to obtain a finished dry powder wall insulation material.
[0040] Application test:
[0041] Method 1: Glass beads-rubber powder polystyrene particle composite insulation material:
[0042] Raw materials preparation:
[0043] Vitrified microspheres: select a bulk density of 80-120kg / m 3 , vitrified microspheres with a particle size of 0.5-1.5mm are the main insulation aggregate, accounting for about 40%-50%.
[0044] Rubber powder polystyrene particles: The particle size of rubber powder polystyrene particles is 2-4mm, accounting for 20%-30%.
[0045] Cement: Ordinary Portland cement, grade 42.5, usage is about 15%-20%.
[0046] Additives: Cellulose ether (to improve the adhesion and construction properties of the material) can be added, the amount is 0.3%-0.5% of the total mass; wood fiber (to enhance crack resistance) is 0.2%-0.4%; and a small amount of hydrophobic agent (to reduce water absorption) is added, about 0.1%-0.3%.
[0047] Mixing process: Pour the vitrified microspheres, rubber powder polystyrene particles, cement, cellulose ether, wood fiber, water repellent, etc. into the dry powder mixer in sequence. Stir at a low speed for 3-5 minutes to make the components preliminarily mixed evenly. Then increase the stirring speed to medium speed and stir for 8-10 minutes to ensure that all materials are fully and evenly mixed to obtain dry powder insulation material.
[0048] Method 2: Rockwool fiber-inorganic thermal insulation mortar composite dry powder material:
[0049] Material selection:
[0050] Rock wool fiber: short rock wool fibers with a length of 3-6 mm, accounting for about 10%-15% of the total mass.
[0051] Raw materials of inorganic thermal insulation mortar: including heavy calcium carbonate powder (particle size 200-300 mesh) accounting for 30%-40%, wollastonite powder (particle size 300-400 mesh) 20%-30%, and cement (grade 32.5) 10%-15%.
[0052] Functional additives: air entraining agent (to improve the pore structure of mortar) can be added, the dosage is 0.05%-0.1%; early strength agent (to improve early strength), about 0.2%-0.3%.
[0053] Preparation steps: First, pour heavy calcium carbonate powder, wollastonite powder and cement into a mixer and stir for 5-7 minutes to mix evenly. Then slowly add rock wool fiber and stir for 3-5 minutes to evenly disperse the fiber in the dry powder. Finally, add air entraining agent, early strength agent and other additives and stir for another 5-8 minutes to obtain the finished dry powder insulation material.
[0054] Method 3: Expanded perlite-gypsum based thermal insulation dry powder material:
[0055] Raw material composition:
[0056] Expanded perlite: select bulk density 60-100kg / m 3 , expanded perlite with particle size of 1-3mm, accounting for 35%-45%.
[0057] Gypsum: Building plaster, accounting for 20%-30%.
[0058] Fly ash: Secondary fly ash, which can improve material properties, accounts for 10%-15%.
[0059] Additives: retarder (such as citric acid), the dosage is 0.1%-0.3% of the mass of gypsum; reinforcing fiber (such as polypropylene fiber), accounting for 0.1%-0.2% of the total mass.
[0060] Production process: Put expanded perlite, fly ash and gypsum into the dry powder mixer in sequence. Stir at low speed for 4-6 minutes, then add retarder and reinforcing fiber. Stir at medium speed for 7-9 minutes until the materials are evenly mixed into dry powder insulation material.
[0061] After preparation, the insulation materials produced by the three methods need to be tested for performance, such as thermal conductivity determination (using the protective hot plate method, etc.), compressive strength test (using a pressure testing machine), water resistance test, etc., to determine whether they are suitable for wall insulation of old communities in cold regions.
[0062] The dry powder wall insulation material of the present invention has excellent thermal insulation performance, can effectively reduce the energy consumption of old residential buildings in cold areas, and reduce winter heating costs. After testing, its thermal conductivity can be as low as 0.05-0.08W / (m·K). The insulation material prepared by the present invention has good construction performance, and can be used by simply adding water and stirring at the construction site. It can be used in a variety of construction methods such as spraying and painting, which is convenient and fast, and is suitable for the complex construction environment and different wall conditions of old residential areas. The insulation material of the present invention has good bonding strength and flexibility, and can be firmly combined with brick-concrete walls, concrete walls, etc. in old residential areas, and is not easy to crack or fall off, ensuring the long-term stability of the insulation effect. The hydrophobic property can effectively resist rain and snow erosion in cold areas, prevent the insulation layer from becoming damp and failing, and further extend the service life of the insulation material.
[0063] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A dry powder wall insulation material for old residential areas in cold regions, characterized by: The raw materials include, by weight: 30-40 parts of vitrified microspheres, 20-30 parts of cement, 15-25 parts of fly ash, 3-6 parts of redispersible latex powder, 0.5-1.5 parts of cellulose ether and 1-3 parts of water repellent.
2. According to claim 1, a dry powder wall insulation material for old residential areas in cold regions is characterized by: The raw materials include, by weight: 35 parts of vitrified microspheres, 25 parts of cement, 20 parts of fly ash, 5 parts of redispersible latex powder, 1 part of cellulose ether and 2 parts of water repellent.
3. The dry powder wall insulation material for old residential areas in cold regions according to claim 1 is characterized by: The raw materials include, by weight: 30 parts of vitrified microspheres, 20 parts of cement, 15 parts of fly ash, 3 parts of redispersible latex powder, 0.5 parts of cellulose ether and 1 part of water repellent.
4. The dry powder wall insulation material for old residential areas in cold regions according to claim 1 is characterized by: The raw materials include, by weight: 40 parts of vitrified microspheres, 30 parts of cement, 25 parts of fly ash, 6 parts of redispersible latex powder, 1.5 parts of cellulose ether and 3 parts of water repellent.
5. A dry powder wall insulation material for old residential areas in cold regions according to any one of claims 1 to 4, characterized in that: The water repellent is one of hexamethyldisiloxane, sodium methyl silicate or polysiloxane.
6. A method for preparing the dry powder wall insulation material for old residential areas in cold regions according to any one of claims 1 to 4, characterized in that: The specific steps include: S1. First, pre-treat the vitrified microspheres to remove impurities and dust therein, and then place them in a drying device and dry them at 80-100° C. for 1-2 hours to make their water content less than 0.5%; S2. According to the above weight parts, cement, fly ash, redispersible latex powder, cellulose ether, and water repellent are respectively put into a dry powder mixer, and stirred at a low speed of 100-150 rpm for 3-5 minutes to make the components preliminarily mixed; S3. Add the dried vitrified microspheres into the mixer and stir at a high speed of 200-300 rpm for 8-12 minutes until all components are fully mixed to obtain a finished dry powder wall insulation material.
7. The method for preparing a dry powder wall insulation material for old residential areas in cold regions according to claim 6, characterized in that: In the step S1, the particle size of the vitrified microspheres is 0.5-1.5 mm, and the vitrified microspheres are used as thermal insulation aggregates.
8. The method for preparing a dry powder wall insulation material for old residential areas in cold regions according to claim 6, characterized in that: The particle size of the redispersible latex powder in step S2 is 2-4 mm.