Energy-saving building wall with SiO2 aerogel heat preservation and insulation layer and construction method of energy-saving building wall

Abstract

The invention discloses an energy-saving building wall with a SiO2 aerogel heat preservation and insulation layer and a construction method thereof. The invention relates to the field of energy-saving and environment-friendly buildings, in particular to a heat preservation outer wall structure of a building, and particularly relates to an energy-saving building wall with a SiO2 aerogel heat preservation and insulation layer. The building wall body structurally comprises a SiO2 aerogel thermal insulation mortar layer (a), a SiO2 aerogel thermal insulation mortar layer (b) and a SiO2 aerogel thermal insulation mortar layer (c) from inside to outside in sequence; (b) a reinforced concrete or block wall base layer; (c) a SiO2 aerogel heat insulation plate layer; (d) a SiO2 aerogel concrete protective layer; (e) a second SiO2 aerogel thermal insulation mortar layer; and (f) a SiO2 aerogel composite thermal insulation coating layer. According to the building wall provided by the invention, the heat transfer coefficient of the wall is optimized and the energy consumption is reduced by utilizing the excellent performance of the SiO2 aerogel material, or the thickness of an external envelope structure is reduced, so that the area utilization rate is improved, and the building wall is applied to external wall bodies of energy-saving buildings, low-energy-consumption buildings and near-zero-energy-consumption buildings.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of energy-saving and environment-friendly buildings, in particular to a building thermal insulation outer wall structure, and more particularly to an energy-saving building wall with a SiO2 aerogel thermal insulation layer and a construction method thereof. BACKGROUND

[0002] At present, the following defects still exist in the thermal insulation layer of building outer walls: 1. Complex structure and need for additional devices: The existing building outer wall thermal insulation and heat insulation structure design is relatively complex, and additional devices are needed to support or fix the thermal insulation and heat insulation materials. For example, a combination of various materials such as expanded perlite, thermal insulation ceramic coating layer, ESP board, asbestos board and PET board, as well as fixing devices such as detent, increases the construction difficulty and cost.

[0003] 2. Not fully utilizing the excellent performance of silica aerogel: Although some of the current market thermal insulation walls use silica aerogel materials, their excellent thermal insulation performance is not fully utilized. These walls often use traditional thermal insulation materials such as rock wool board layer and glass fiber cotton layer, which may not achieve the best overall thermal insulation effect and may also increase pollution and production cost.

[0004] 3. The overall heat transfer coefficient of the wall is not optimized: Some existing walls use silica aerogel materials in only one or a few layers, and the overall heat transfer coefficient of the wall is not optimized. This may be due to a lack of overall consideration of the thermal performance of the materials in each layer of the wall, or the inability to find the best material combination and structure.

[0005] 4. Not covering all structural levels of the outer wall: Currently, there is no product on the market that applies silica aerogel thermal insulation and heat insulation materials to all structural levels of the outer wall, which means that existing walls may only focus on a specific part and ignore the overall thermal insulation effect of the structure. This local optimization approach often fails to achieve the best energy-saving effect.

[0006] 5. Construction efficiency and environmental friendliness need to be improved: Due to the different levels of the above structure, the construction efficiency during construction is low, for example, multiple layers of materials need to be painted or fixed multiple times. In addition, the use of some traditional thermal insulation materials may also cause environmental pollution problems.

[0007] In summary, the current existing thermal insulation wall approach has deficiencies in structural complexity, material performance utilization, wall overall heat transfer coefficient optimization, coverage of all structural levels of the outer wall, and construction efficiency and environmental friendliness. SUMMARY

[0008] The present application aims to overcome the above-mentioned defects, and proposes a simpler, more efficient and environmentally friendly way to achieve better thermal insulation effect of building walls.

[0009] In order to achieve the above-mentioned purpose, the present application is implemented as follows: An energy-saving building wall with a SiO2 aerogel thermal insulation layer, the building wall is constructed from inside to outside in turn as follows: (a) SiO2 aerogel thermal insulation mortar layer; (b) reinforced concrete or block wall base layer; (c) SiO2 aerogel insulation board layer; (d) SiO2 aerogel concrete protective layer; (e) second layer of SiO2 aerogel thermal insulation mortar layer; (f) SiO2 aerogel composite thermal insulation coating layer.

[0010] The construction method of the above-mentioned energy-saving building wall with a SiO2 aerogel thermal insulation layer, comprising the following steps: (a) using cast-in-place reinforced concrete wall column or block wall as the base layer, evenly brushing SiO2 aerogel thermal insulation mortar in three passes, and allowing it to dry naturally after each pass; (b) laying SiO2 aerogel insulation board on the dried SiO2 aerogel thermal insulation mortar layer, the thickness is determined according to the energy-saving design calculation; (c) casting SiO2 aerogel concrete protective layer on the outside of the SiO2 aerogel insulation board; (d) evenly brushing SiO2 aerogel thermal insulation mortar in two passes on the outside of the SiO2 aerogel concrete protective layer, and allowing it to dry naturally after each pass; (e) evenly brushing SiO2 aerogel composite thermal insulation coating in two passes on the outside of the dried second layer of SiO2 aerogel thermal insulation mortar layer, and ensuring uniform thickness and smooth surface.

[0011] Further, the above-mentioned energy-saving building wall with a SiO2 aerogel thermal insulation layer, the SiO2 aerogel thermal insulation mortar layer is a mortar material made by mixing aerogel and mortar and other raw materials, which replaces traditional mortar, and has a thermal conductivity of 0.067 W / (m·K) and a compressive strength of 1.45 MPa, which meets the current technical requirements for thermal insulation mortar.

[0012] Further, the above-mentioned energy-saving building wall with a SiO2 aerogel thermal insulation layer, the heat transfer coefficient of the SiO2 aerogel insulation board layer is below 0.020 W / (m·K), which has good thermal insulation performance and high temperature resistance, effectively prevents the diffusion of indoor heat to the outside, and has flame retardant effect.

[0013] Further, the energy-saving building wall with the SiO2 aerogel thermal insulation layer, the SiO2 aerogel concrete protective layer is made of quartz powder, quartz sand and aerogel, when the volume ratio of aerogel in the cement matrix reaches 60%, the density of the material reaches 860 kg / m 3 , the compressive strength reaches 10 MPa, and the thermal conductivity can reach 0.170 W / (m·K).

[0014] Further, the energy-saving building wall with the SiO2 aerogel thermal insulation layer, the SiO2 aerogel composite thermal insulation coating layer is made by adding SiO2 aerogel powder as a filler to the coating, and the thermal conductivity is 0.027 w / (m·K) and the density is 200 kg / m 3 .

[0015] Further, the construction method of the energy-saving building wall with the SiO2 aerogel thermal insulation layer, In step (a), the thickness of each coating of the SiO2 aerogel thermal insulation mortar is 6-7 mm.

[0016] Further, the construction method of the energy-saving building wall with the SiO2 aerogel thermal insulation layer, in step (c), the thickness of the SiO2 aerogel concrete protective layer is 50 mm.

[0017] Further, the construction method of the energy-saving building wall with the SiO2 aerogel thermal insulation layer, in steps (d) and (e), the thickness of each coating of the SiO2 aerogel thermal insulation mortar and the SiO2 aerogel composite thermal insulation coating is 5 mm.

[0018] The energy-saving building wall with the SiO2 aerogel thermal insulation layer and the construction method thereof have the following advantages and characteristics: 1. Significantly improve the thermal insulation performance: by comprehensively applying SiO2 aerogel thermal insulation materials (including thermal insulation mortar, thermal insulation board, concrete protective layer and composite thermal insulation coating) in multiple levels of the wall, the energy-saving building wall of the present application achieves significant thermal insulation effect; relying on the excellent performance of SiO2 aerogel, the heat transfer coefficient of the wall is greatly reduced, effectively preventing the diffusion of indoor heat to the outside, thereby improving the energy efficiency of the building.

[0019] 2. Optimize the wall structure and simplify the construction process: the wall structure of the present application is reasonable, by applying SiO2 aerogel materials in multiple levels, the thermal insulation performance of the wall is guaranteed, and the construction process is simplified. Compared with the traditional wall structure, the present application does not need additional fixing or supporting devices, which reduces the construction difficulty and cost, and improves the construction efficiency.

[0020] 3. Improve the durability and safety of the wall: SiO2 aerogel material not only has excellent thermal insulation performance, but also has good fire resistance, transparency and environmental protection. The energy-saving building wall of the application improves the durability and safety of the wall by applying this material comprehensively, and reduces the safety hazards caused by aging or burning of the wall material.

[0021] 4. Environmental protection and energy saving, meet the requirements of green building: the SiO2 aerogel material used in the application is an environmentally friendly material, which has no pollution in the production process and can be recycled. At the same time, due to the significant improvement of the thermal insulation performance of the wall, the building energy consumption and carbon emissions are reduced, which meets the requirements of green building and sustainable development.

[0022] In summary, the energy-saving building wall with SiO2 aerogel thermal insulation layer and its construction method proposed in the application not only breaks through in thermal insulation performance, but also makes significant progress in structure optimization, construction simplification, durability improvement, environmental protection and energy saving. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The wall section of the embodiment of the application is shown in the figure.

[0024] In the figure: SiO2 aerogel thermal insulation mortar 1; SiO2 aerogel concrete 2; SiO2 aerogel insulation board 3; reinforced concrete wall column or block wall 4; SiO2 aerogel composite thermal insulation coating 5. DETAILED DESCRIPTION

[0025] The technical solutions of the embodiments of the application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of the application.

[0026] As Figure 1 An energy-saving building wall, which is constructed from inside to outside in turn: (a) the first layer of SiO2 aerogel thermal insulation mortar 1; (b) reinforced concrete or block wall base 4; (c) SiO2 aerogel insulation board layer 3; (d) SiO2 aerogel concrete protective layer 2; (e) the second layer of SiO2 aerogel thermal insulation mortar 1; (f) SiO2 aerogel composite thermal insulation coating layer 5.

[0027] The construction process of the above-mentioned energy-saving building wall includes: 1. Preparation of base wall: The cast-in-place reinforced concrete wall column or block wall is used as the base, and the base wall is ensured to be flat, solid, crack-free and hollow.

[0028] 2. Apply the first layer of SiO2 aerogel insulation mortar: Uniformly apply the first layer of SiO2 aerogel insulation mortar on the base wall, with a thickness of 6-7mm; use professional tools to ensure uniform application without omission.

[0029] 3. Dry the first layer of insulation mortar: Let the first layer of SiO2 aerogel insulation mortar dry naturally until it is completely cured.

[0030] 4. Lay SiO2 aerogel insulation board: Lay SiO2 aerogel insulation board on the dried first layer of SiO2 aerogel insulation mortar, and determine the thickness of the insulation board according to energy-saving design calculations. Ensure that the insulation board is laid flat and tightly adhered.

[0031] 5. Cast-in-place SiO2 aerogel concrete protective layer: Cast-in-place SiO2 aerogel concrete protective layer on the outside of the SiO2 aerogel insulation board, with a thickness of 50mm. Use professional equipment to ensure uniform concrete protective layer pouring without voids.

[0032] 6. Apply the second layer of SiO2 aerogel insulation mortar: Uniformly apply the second layer of SiO2 aerogel insulation mortar on the outside of the SiO2 aerogel concrete protective layer, with a thickness of 6-7mm. Similarly, use professional tools to ensure uniform application.

[0033] 7. Dry the second layer of insulation mortar: Let the second layer of SiO2 aerogel insulation mortar dry naturally until it is completely cured.

[0034] 8. Apply SiO2 aerogel composite insulation paint: Apply SiO2 aerogel composite insulation paint evenly in two passes on the outside of the dried second layer of SiO2 aerogel insulation mortar, with a thickness of 5mm per pass. Ensure that the paint is applied evenly and the surface is flat.

[0035] 9. Final inspection and acceptance: Conduct a comprehensive inspection of the entire energy-saving building wall to ensure that each layer of material is constructed according to the design requirements without omission or defects. After passing the inspection of professional agencies, it can be put into use.

[0036] Through the above embodiments, the features and advantages of the present application are known, and the multi-level application of SiO2 aerogel is as follows: the SiO2 aerogel thermal insulation material is applied to multiple construction levels (thermal insulation mortar, thermal insulation board, concrete protective layer, and composite thermal insulation coating) of the wall, and the multi-level application is obviously more comprehensive and in-depth than the application of SiO2 aerogel in only one level in the prior art. The multi-level application helps to maximize the thermal insulation performance of SiO2 aerogel, thereby optimizing the overall heat transfer coefficient of the wall.

[0037] Further, the wall and the construction method thereof provided in the present application are derived from the traditional method, and on this basis, several key details are organically combined into a complete and multi-level SiO2 aerogel thermal insulation wall structure, and a specific manufacturing method is given. Therefore, although some technical details in the technical solution of the present application may have been widely recognized and applied, integrating them into an innovative technical solution and applying them in the field of building energy saving should not be considered as a matter of course. In particular, considering the importance of building energy saving and the excellent performance of SiO2 aerogel material, the above wall and the construction method thereof provided in the present application have high practical value and application prospect.

[0038] The above is only an embodiment provided by the present application and does not limit the present application, although the present application is described in detail with reference to the embodiments. For those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents, but any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An energy-saving building wall with a SiO2 aerogel thermal insulation layer, characterized in that, The building walls, from the inside out, are constructed as follows: (a) SiO2 aerogel thermal insulation mortar layer; (b) Reinforced concrete or block wall base; (c) SiO2 aerogel insulation layer; (d) SiO2 aerogel concrete protective layer; (e) Second layer of SiO2 aerogel insulation mortar; (f) SiO2 aerogel composite thermal insulation coating layer.

2. The construction method of the energy-saving building wall with SiO2 aerogel thermal insulation layer as described in claim 1, characterized in that, Includes the following steps: (a) Apply SiO2 aerogel insulation mortar evenly in three coats to the cast-in-place reinforced concrete wall column or block wall as the base layer, and allow it to dry naturally after each coat; (b) Lay SiO2 aerogel insulation board on the dried SiO2 aerogel insulation mortar layer, with the thickness determined according to the energy-saving design calculation; (c) Cast-in-place SiO2 aerogel concrete protective layer on the outside of the SiO2 aerogel insulation board; (d) Apply SiO2 aerogel insulation mortar evenly in two coats on the outside of the SiO2 aerogel concrete protective layer, and allow it to dry naturally after each coat; (e) Apply SiO2 aerogel composite insulation coating evenly in two coats on the outside of the dried second layer of SiO2 aerogel insulation mortar layer, ensuring uniform thickness and a smooth surface.

3. The energy-saving building wall with a SiO2 aerogel thermal insulation layer according to claim 1, characterized in that: The SiO2 aerogel thermal insulation mortar layer is a mortar material made by mixing aerogel and mortar and other raw materials, replacing traditional mortar. Its thermal conductivity is 0.067W / (m·K) and its compressive strength is 1.45MPa, which should meet the current technical requirements for thermal insulation mortar.

4. The energy-saving building wall with a SiO2 aerogel thermal insulation layer according to claim 1, characterized in that: The SiO2 aerogel insulation board has a heat transfer coefficient of less than 0.020 W / (m·K), exhibiting excellent thermal insulation performance, high temperature resistance, and effectively preventing indoor heat from diffusing to the outside, while also possessing flame retardant properties.

5. The energy-saving building wall with a SiO2 aerogel thermal insulation layer according to claim 1, characterized in that: The SiO2 aerogel concrete protective layer is made of quartz powder, quartz sand, and aerogel. When the aerogel accounts for 60% of the volume of the cement matrix, the density of the material reaches 860 kg / m³. 3 It has a compressive strength of 10 MPa and a thermal conductivity of 0.170 W / (m·K).

6. The energy-saving building wall with a SiO2 aerogel thermal insulation layer according to claim 1, characterized in that: The SiO2 aerogel composite thermal insulation coating layer is made by adding SiO2 aerogel powder as a filler to the coating. Its thermal conductivity is 0.027 W / (m·K) and its density is 200 kg / m³. 3 .

7. The construction method of the energy-saving building wall with SiO2 aerogel thermal insulation layer according to claim 2, characterized in that: In step (a), the thickness of each coat of SiO2 aerogel insulation mortar is 6-7 mm.

8. The method for constructing an energy-saving building wall with a SiO2 aerogel thermal insulation layer according to claim 2, characterized in that: In step (c), the thickness of the SiO2 aerogel concrete protective layer is 50 mm.

9. The construction method of the energy-saving building wall with SiO2 aerogel thermal insulation layer according to claim 2, characterized in that: In steps (d) and (e), the thickness of each coat of SiO2 aerogel insulation mortar and SiO2 aerogel composite insulation coating is 5 mm.

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