Roof thermal insulation material for northeast old community and preparation method of roof thermal insulation material
The roof insulation materials in old communities in Northeast China prepared by using rock wool fibers, expanded perlite and other raw materials, the problems of poor insulation performance, flammability and insufficient durability of existing materials are solved, and the insulation effect is efficient, safe and environmentally friendly and closely integrated with the base layer of old roofs is achieved.
Patent Information
- Application Number
- CN202510030941.8
- 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 roofs of old communities in Northeast China have poor insulation performance, the existing materials are flammable, insufficient durability, and are not closely integrated with the base layer of old roofs.
A roof insulation material in old communities in Northeast China is adopted, and its raw materials include 20-30 parts of rock wool fiber, 30-40 parts of expanded perlite, 10-15 parts of binder, 5-8 parts of dispersed latex powder, 3-5 parts of wood fiber, 2-5 parts of inorganic nanoaerogel and 1-3 parts of hydrophobic agent, and is prepared by stirring and vibration forming.
The material is efficient, safe and environmentally friendly, non-flammable, has good durability, and can be closely integrated with the base layer of old roofs, and is suitable for roofs in old communities in Northeast China.
Smart Images
Figure CN119822781A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of building thermal insulation materials, and in particular to a thermal insulation material for the roof of an old residential area in Northeast China and a preparation method thereof. Background Art
[0002] At present, the mainstream products of external wall insulation materials in China are organic insulation materials such as polystyrene foam boards and polystyrene extruded boards. The advantages of these organic insulation materials are excellent thermal insulation performance and low price, but they also have fatal defects, that is, they are all combustible materials and have the risk of causing fire. At the same time, cement concrete materials themselves have some defects, such as heavy weight, low tensile strength, easy shrinkage cracking (including plastic shrinkage cracking, hardening and drying shrinkage cracking), etc. These defects limit their wider use in structural engineering.
[0003] Thermal insulation materials are also called insulation materials, which generally refer to materials that have a strong resistance to heat flow. According to the organizational structure, thermal insulation materials can be divided into fibrous aggregated organizations (inorganic or organic fibers and products), loose granular, flaky or powdery organizations (such as light aggregate, pumice, diatomaceous earth), porous structures (porous concrete, foam plastics, etc.) and dense structures (aluminum foil, etc.). Thermal conductivity is the main indicator to characterize thermal insulation performance. Materials with thermal conductivity less than 0.12W / (m·K) are usually called thermal insulation materials. Thermal conductivity is mainly related to the density, porosity and pore structure of the material. Generally speaking, the larger the porosity of the material, the lighter the texture, the lower the thermal conductivity and the better the thermal insulation performance.
[0004] The climate in Northeast China is cold in winter, and the poor thermal insulation performance of roofs in old residential areas has become an important issue affecting residents' indoor comfort and building energy conservation. Although traditional roof insulation materials such as polystyrene foam boards have certain thermal insulation effects, they are flammable, lack durability, and are not tightly bonded to the old roof base. Therefore, it is of great significance to develop a new type of thermal insulation material that is efficient, safe, environmentally friendly, and suitable for roofs in old residential areas in Northeast China. Summary of the invention
[0005] 1. Technical issues to be resolved
[0006] In view of the shortcomings of the prior art, the present invention provides a roof insulation material for old residential areas in Northeast China and a preparation method thereof, which solves the problems of poor roof insulation performance in existing old residential areas, flammability, insufficient durability, and loose bonding with the old roof base.
[0007] (II) Technical solution
[0008] To achieve the above objectives, the present invention is implemented through the following technical scheme: a roof insulation material for old communities in Northeast China, whose raw materials include, by weight: 20-30 parts of rock wool fiber, 30-40 parts of expanded perlite, 10-15 parts of binder, 5-8 parts of dispersed latex powder, 3-5 parts of wood fiber, 2-5 parts of inorganic nano aerogel and 1-3 parts of water repellent.
[0009] Preferably, the raw materials include, by weight: 25 parts of rock wool fiber, 35 parts of expanded perlite, 13 parts of binder, 7 parts of dispersed latex powder, 4 parts of wood fiber, 3 parts of inorganic nano aerogel and 2 parts of water repellent.
[0010] Preferably, the raw materials include, by weight: 20 parts of rock wool fiber, 30 parts of expanded perlite, 10 parts of binder, 5 parts of dispersed latex powder, 3 parts of wood fiber, 2 parts of inorganic nano aerogel and 1 part of water repellent.
[0011] Preferably, the raw materials include, by weight: 30 parts of rock wool fiber, 40 parts of expanded perlite, 15 parts of binder, 8 parts of dispersed latex powder, 5 parts of wood fiber, 5 parts of inorganic nano aerogel and 3 parts of water repellent.
[0012] Preferably, the length of the rock wool fiber is 3-8 cm, and the particle size of the expanded perlite is 1-3 mm.
[0013] Preferably, the binder is sodium silicate.
[0014] Preferably, the hydrophobic agent is one of calcium stearate, hexamethyldisiloxane or potassium methylsilicate.
[0015] The present invention also provides a method for preparing a roof insulation material for an old residential area in Northeast China, which specifically comprises the following steps:
[0016] S1. Put rock wool fiber, expanded perlite and wood fiber into a blender and stir at a low speed for 5-10 minutes to make them preliminarily mixed;
[0017] S2, adding the binder, dispersed latex powder, inorganic nano-aerogel and hydrophobic agent into an appropriate amount of water, stirring until completely dissolved to form a uniform mixed solution;
[0018] S3, slowly adding the mixed solution obtained in step S2 to the mixer in step S1, while increasing the stirring speed to medium speed, stirring for 15-20 minutes to fully mix the raw materials and form a uniform slurry;
[0019] S4, pouring the slurry obtained in step S3 into a mold, using vibration molding to expel bubbles and make the material dense, and then curing it at room temperature for 24-48 hours, and continuing to cure it for 7-14 days after demolding to obtain a finished thermal insulation material.
[0020] (III) Beneficial effects
[0021] The present invention provides a roof insulation material for old residential areas in Northeast China and a preparation method thereof. Compared with the prior art, the present invention has the following beneficial effects: the roof insulation material for old residential areas in Northeast China and a preparation method thereof, the raw materials of which include by weight: 20-30 parts of rock wool fiber, 30-40 parts of expanded perlite, 10-15 parts of binder, 5-8 parts of dispersed latex powder, 3-5 parts of wood fiber, 2-5 parts of inorganic nano aerogel and 1-3 parts of water repellent, the prepared insulation material is efficient, safe and environmentally friendly and suitable for the roofs of old residential areas in Northeast China, will not affect the indoor comfort of residents and building energy conservation, is non-flammable, has good durability, and can be closely combined with the old roof base. 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 embodiment of the present invention provides three technical solutions: a roof insulation material for an old residential area in Northeast China and a preparation method thereof, specifically including the following embodiments:
[0025] Example 1: A roof insulation material for an old residential area in Northeast China, wherein the raw materials include, by weight: 25 parts of rock wool fiber, 35 parts of expanded perlite, 13 parts of a binder, 7 parts of dispersed latex powder, 4 parts of wood fiber, 3 parts of an inorganic nano-aerogel and 2 parts of a water repellent, the length of the rock wool fiber is 3-8 cm, the particle size of the expanded perlite is 1-3 mm, the binder is sodium silicate, and the water repellent is one of calcium stearate, hexamethyldisiloxane or potassium methyl silicate.
[0026] In an embodiment of the present invention, a method for preparing a roof insulation material for an old residential area in Northeast China specifically comprises the following steps:
[0027] S1. Put rock wool fiber, expanded perlite and wood fiber into a blender and stir at a low speed for 5-10 minutes to make them preliminarily mixed;
[0028] S2, adding the binder, dispersed latex powder, inorganic nano-aerogel and hydrophobic agent into an appropriate amount of water, stirring until completely dissolved to form a uniform mixed solution;
[0029] S3, slowly adding the mixed solution obtained in step S2 to the mixer in step S1, while increasing the stirring speed to medium speed, stirring for 15-20 minutes to fully mix the raw materials and form a uniform slurry;
[0030] S4, pouring the slurry obtained in step S3 into a mold, using vibration molding to expel bubbles and make the material dense, and then curing it at room temperature for 24-48 hours, and continuing to cure it for 7-14 days after demolding to obtain a finished thermal insulation material.
[0031] Example 2: A roof insulation material for old communities in Northeast China, wherein the raw materials include, by weight: 20 parts of rock wool fiber, 30 parts of expanded perlite, 10 parts of binder, 5 parts of dispersed latex powder, 3 parts of wood fiber, 2 parts of inorganic nano aerogel and 1 part of water repellent, the length of the rock wool fiber is 3-8 cm, the particle size of the expanded perlite is 1-3 mm, the binder is sodium silicate, and the water repellent is one of calcium stearate, hexamethyldisiloxane or potassium methyl silicate.
[0032] In an embodiment of the present invention, a method for preparing a roof insulation material for an old residential area in Northeast China specifically comprises the following steps:
[0033] S1. Put rock wool fiber, expanded perlite and wood fiber into a blender and stir at a low speed for 5-10 minutes to make them preliminarily mixed;
[0034] S2, adding the binder, dispersed latex powder, inorganic nano-aerogel and hydrophobic agent into an appropriate amount of water, stirring until completely dissolved to form a uniform mixed solution;
[0035] S3, slowly adding the mixed solution obtained in step S2 to the mixer in step S1, while increasing the stirring speed to medium speed, stirring for 15-20 minutes to fully mix the raw materials and form a uniform slurry;
[0036] S4, pouring the slurry obtained in step S3 into a mold, using vibration molding to expel bubbles and make the material dense, and then curing it at room temperature for 24-48 hours, and continuing to cure it for 7-14 days after demolding to obtain a finished thermal insulation material.
[0037] Example 3: A roof insulation material for old communities in Northeast China, wherein the raw materials include, by weight: 30 parts of rock wool fiber, 40 parts of expanded perlite, 15 parts of binder, 8 parts of dispersed latex powder, 5 parts of wood fiber, 5 parts of inorganic nano aerogel and 3 parts of water repellent, the length of the rock wool fiber is 3-8 cm, the particle size of the expanded perlite is 1-3 mm, the binder is sodium silicate, and the water repellent is one of calcium stearate, hexamethyldisiloxane or potassium methyl silicate.
[0038] In an embodiment of the present invention, a method for preparing a roof insulation material for an old residential area in Northeast China specifically comprises the following steps:
[0039] S1. Put rock wool fiber, expanded perlite and wood fiber into a blender and stir at a low speed for 5-10 minutes to make them preliminarily mixed;
[0040] S2, adding the binder, dispersed latex powder, inorganic nano-aerogel and hydrophobic agent into an appropriate amount of water, stirring until completely dissolved to form a uniform mixed solution;
[0041] S3, slowly adding the mixed solution obtained in step S2 to the mixer in step S1, while increasing the stirring speed to medium speed, stirring for 15-20 minutes to fully mix the raw materials and form a uniform slurry;
[0042] S4, pouring the slurry obtained in step S3 into a mold, using vibration molding to expel bubbles and make the material dense, and then curing it at room temperature for 24-48 hours, and continuing to cure it for 7-14 days after demolding to obtain a finished thermal insulation material.
[0043] 1. Thermal conductivity test
[0044] Experimental purpose: To determine the thermal conductivity of the insulation material. The smaller the thermal conductivity, the better the insulation effect. This is critical to reducing indoor heat loss in cold weather in Northeast China.
[0045] Experimental method: Use the heat flow meter method or the guarded hot plate method. Taking the heat flow meter method as an example, the insulation material is made into a specimen of a certain size and placed between a hot plate and a cold plate. The hot plate is kept at a constant temperature, and the cold plate is at a lower temperature. The heat flow through the specimen is measured by the heat flow meter, and the thermal conductivity is calculated according to the formula based on the thickness and area of the specimen.
[0046] 2. Weather resistance test
[0047] Purpose of the experiment: The climate in Northeast China is changeable, including severe cold, snow, freezing, and sunshine. This experiment is used to test whether the performance of thermal insulation materials is stable under long-term complex climatic conditions.
[0048] Experimental method: A combination of natural exposure test and artificial accelerated aging test can be used. The natural exposure test is to place the insulation material sample on the test rack on the outdoor roof in Northeast China, regularly observe the appearance and performance changes of the material, and record conditions such as cracking and deformation. The artificial accelerated aging test uses an aging chamber to simulate the extreme climate conditions in Northeast China, such as extreme cold, high temperature, ultraviolet radiation, freeze-thaw cycles, etc., and check the performance changes of the material after a certain number of cycles.
[0049] 3. Compressive strength test
[0050] Purpose of the experiment: In the winter in Northeast China, a large amount of snow will accumulate on the roof. The insulation material needs to have a certain degree of pressure resistance to prevent it from being crushed and losing its insulation effect.
[0051] Experimental method: Use a pressure testing machine to test the compressive strength of the test piece of the thermal insulation material. The thermal insulation material is made into a cube or cylinder test piece of specified size, placed between the upper and lower pressure plates of the pressure testing machine, and pressure is applied at a certain loading speed until the test piece is destroyed. The maximum pressure value is recorded and the compressive strength is obtained by calculation.
[0052] 4. Hygroscopicity test
[0053] Purpose of the experiment: In the Northeast environment with changing humidity, the thermal insulation performance of the material may be reduced after absorbing moisture, so the hygroscopicity of the material should be tested.
[0054] Experimental method: Weigh the insulation material specimen in a dry environment and record the initial weight m1. Then place the specimen in an environmental box with controlled temperature and humidity (simulating the high humidity environment in Northeast China), take it out after a certain period of time (such as 24 hours, 48 hours, etc.), quickly wipe off the surface water droplets with a wet cloth and weigh it, and record the weight m2. The formula for calculating hygroscopicity is: Moisture absorption rate = (m2-m1) / m1×100%.
[0055] In summary, the thermal insulation material prepared by the present invention is efficient, safe, environmentally friendly and suitable for the roofs of old residential areas in Northeast China. It will not affect the indoor comfort of residents and building energy conservation. It is non-flammable, has good durability, and can be tightly integrated with the old roof base.
[0056] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0057] 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.
[0058] 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 roof insulation material for old residential areas in Northeast China, characterized by: The raw materials include, by weight: 20-30 parts of rock wool fiber, 30-40 parts of expanded perlite, 10-15 parts of binder, 5-8 parts of dispersed latex powder, 3-5 parts of wood fiber, 2-5 parts of inorganic nano aerogel and 1-3 parts of water repellent.
2. The roof insulation material for old residential areas in Northeast China according to claim 1 is characterized by: The raw materials include, by weight: 25 parts of rock wool fiber, 35 parts of expanded perlite, 13 parts of binder, 7 parts of dispersed latex powder, 4 parts of wood fiber, 3 parts of inorganic nano aerogel and 2 parts of water repellent.
3. The roof insulation material for old residential areas in Northeast China according to claim 1 is characterized by: The raw materials include, by weight: 20 parts of rock wool fiber, 30 parts of expanded perlite, 10 parts of binder, 5 parts of dispersed latex powder, 3 parts of wood fiber, 2 parts of inorganic nano aerogel and 1 part of water repellent.
4. The roof insulation material for old residential areas in Northeast China according to claim 1 is characterized by: The raw materials include, by weight: 30 parts of rock wool fiber, 40 parts of expanded perlite, 15 parts of binder, 8 parts of dispersed latex powder, 5 parts of wood fiber, 5 parts of inorganic nano aerogel and 3 parts of water repellent.
5. A roof insulation material for old residential areas in Northeast China according to any one of claims 1 to 4, characterized in that: The length of the rock wool fiber is 3-8 cm, and the particle size of the expanded perlite is 1-3 mm.
6. A roof insulation material for old residential areas in Northeast China according to any one of claims 1 to 4, characterized in that: The binder is sodium silicate.
7. A roof insulation material for old residential areas in Northeast China according to any one of claims 1 to 4, characterized in that: The water repellent is one of calcium stearate, hexamethyldisiloxane or potassium methyl silicate.
8. A method for preparing the roof insulation material for old residential areas in Northeast China as claimed in any one of claims 1 to 4, characterized in that: The specific steps include: S1. Put rock wool fiber, expanded perlite and wood fiber into a blender and stir at a low speed for 5-10 minutes to make them preliminarily mixed; S2, adding the binder, dispersed latex powder, inorganic nano-aerogel and hydrophobic agent into an appropriate amount of water, stirring until completely dissolved to form a uniform mixed solution; S3, slowly adding the mixed solution obtained in step S2 to the mixer in step S1, while increasing the stirring speed to medium speed, stirring for 15-20 minutes to fully mix the raw materials and form a uniform slurry; S4, pouring the slurry obtained in step S3 into a mold, using vibration molding to expel bubbles and make the material dense, and then curing it at room temperature for 24-48 hours, and continuing to cure it for 7-14 days after demolding to obtain a finished thermal insulation material.