Waterproof prefabricated insulation board for outer wall

Abstract

The utility model discloses an outer wall waterproof prefabricated insulation board which comprises a prefabricated insulation layer and an outer side waterproof layer located on the outer side of the prefabricated insulation layer, an embedded connecting piece connected with an outer wall body is embedded in the prefabricated insulation layer, and a creep transition layer is arranged between the outer side waterproof layer and the prefabricated insulation layer. The creep coefficient of the creep transition layer is located between the creep coefficient of the outer waterproof layer and the creep coefficient of the prefabricated heat preservation layer. Therefore, the relative creep between the outer side waterproof layer and the prefabricated thermal insulation layer is transited, the creep of the outer side waterproof layer relative to the creep transition layer is smaller than the original creep, and the creep stress is controlled within a reasonable range, so that the generation of micro-cracks is greatly reduced, and the waterproof effectiveness of the outer wall is ensured; meanwhile, the outer waterproof layer is tightly combined on the outer side of the creep transition layer, falling can be effectively prevented, and safety is ensured.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building technology, and in particular to a prefabricated waterproof and heat-insulating exterior wall panel. Background Technology

[0002] Existing prefabricated exterior wall insulation panels are typically prefabricated in a factory and then connected to the outside of the exterior wall through methods such as adhesive bonding, anchoring, or external hanging. To achieve waterproofing, a waterproof coating is usually applied to the outside of the exterior wall, which significantly increases the cost of secondary construction of the exterior wall.

[0003] To reduce overall construction costs, existing technologies involve prefabricating a waterproof layer on the outside of precast insulation panels in the factory, forming a waterproof precast insulation panel. This panel is then transported to the construction site and integrated with the main exterior wall structure to achieve waterproofing. However, due to the significant difference in creep coefficients between the concrete used in the precast insulation layer and the waterproofing material used in the waterproofing layer, repeated creep stress during long-term use can easily cause micro-cracks in the waterproofing layer, leading to its failure and water seepage. In severe cases, the waterproofing layer may even detach, posing safety risks. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the waterproof layer of the prefabricated waterproof insulation board for exterior walls fails or even falls off due to the large difference in creep coefficient in the prior art. The present invention provides a prefabricated waterproof insulation board for exterior walls that is more reliable in waterproofing.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a prefabricated waterproof insulation board for exterior walls is constructed, comprising a prefabricated insulation layer and an outer waterproof layer located outside the prefabricated insulation layer. An embedded connector for connecting to the main body of the exterior wall is pre-embedded in the prefabricated insulation layer. A creep transition layer is provided between the outer waterproof layer and the prefabricated insulation layer, and the creep coefficient of the creep transition layer is located between the creep coefficient of the outer waterproof layer and the creep coefficient of the prefabricated insulation layer.

[0006] Furthermore, the prefabricated insulation layer is made of coarse-grained modified polystyrene particle concrete, which reduces the density of the panels while ensuring the insulation performance of the wall, making transportation and installation easier.

[0007] Furthermore, the creep transition layer is a precast layer made of fine-particle-modified polystyrene particle concrete; this allows for reliable bonding with the precast insulation layer made of coarse-particle-modified polystyrene particle concrete. Simultaneously, the fine-particle-modified polystyrene particle concrete has low porosity, further improving the waterproof performance of the outer side of the board. Its higher density also enhances the overall compressive and flexural strength of the board, facilitating transportation.

[0008] Furthermore, the particle size d of the modified polystyrene particles in the fine-particle-size modified polystyrene particle concrete and the particle size D of the modified polystyrene particles in the coarse-particle-size modified polystyrene particle concrete satisfy the relationship D≥kd, where k is 4-8. This ensures a creep transition between the outer waterproof layer and the precast insulation layer, and also reliably combines the two together.

[0009] Furthermore, the pre-embedded connector extends within the creep transition layer to ensure that the entire prefabricated waterproof insulation board for the exterior wall can be reliably connected to the outside of the cast-in-place wall, ensuring safety.

[0010] Furthermore, the inner side of the prefabricated insulation layer is also provided with an inner waterproof layer, which further improves the waterproof performance of the exterior wall.

[0011] Furthermore, the inner waterproof layer is a prefabricated layer made of cement-based penetrating crystalline waterproof material, which utilizes the water-crystallizing properties of the waterproof material to construct a second waterproof barrier on the outside of the outer wall.

[0012] Furthermore, the outer waterproof layer is a precast layer made of crack-resistant waterproof mortar, which typically contains polymer latex and cement, enabling it to reliably bond with the creep transition layer.

[0013] The prefabricated waterproof and thermal insulation board for exterior walls according to this utility model has the following beneficial effects: By setting a creep transition layer between the outer waterproof layer and the prefabricated thermal insulation layer, and setting the creep coefficient of the creep transition layer to be between the creep coefficients of the outer waterproof layer and the prefabricated thermal insulation layer, the relative creep between the outer waterproof layer and the prefabricated thermal insulation layer is transitioned, making the creep of the outer waterproof layer relative to the creep transition layer base layer smaller than before, controlling the creep stress within a reasonable range, thereby significantly reducing the generation of micro-cracks and ensuring the effectiveness of the exterior wall waterproofing; at the same time, the outer waterproof layer is tightly bonded to the outside of the creep transition layer, which can effectively prevent detachment and ensure safety.

[0014] Furthermore, using coarse-grained modified polystyrene particle concrete to create the precast insulation layer ensures the overall insulation performance of the wall panel. Using fine-grained modified polystyrene particle concrete to create the creep transition layer offers several advantages. First, the lower porosity of fine-grained modified polystyrene particle concrete further enhances the waterproofing performance of the entire panel's exterior. Second, the higher density of fine-grained modified polystyrene particle concrete compared to coarse-grained modified polystyrene particle concrete means the creep transition layer has a higher density than the precast insulation layer, improving the overall flexural and bending resistance of the panel and facilitating transportation. Simultaneously, the use of modified polystyrene particle concrete for both the creep transition layer and the precast insulation layer results in a tighter bond between them. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 The diagram shown is a structural schematic of a preferred embodiment of the prefabricated waterproof and heat-insulating wall panel of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] like Figure 1 As shown, in a preferred embodiment of the prefabricated waterproof insulation board for exterior walls according to this utility model, it mainly includes a prefabricated insulation layer 3, an outer waterproof layer 1 disposed outside the prefabricated insulation layer 3, and a creep transition layer 2 disposed between the outer waterproof layer 1 and the prefabricated insulation layer 3. An embedded connector (not shown in the figure) is pre-embedded in the prefabricated insulation layer 3, which connects to the exterior wall body to reliably connect the entire prefabricated waterproof insulation board to the outside of the exterior wall body. Preferably, the creep coefficient P of the creep transition layer is located between the creep coefficient P1 of the outer waterproof layer and the creep coefficient P2 of the prefabricated insulation layer, i.e., P2>P>P1. Thus, due to the transition of the creep transition layer, problems such as micro-cracks caused by excessive creep difference between the prefabricated insulation layer and the outer waterproof layer are avoided, ensuring the effectiveness of the outer waterproofing and preventing the outer waterproof layer from detaching.

[0019] In this invention, it is preferred that both the precast insulation layer and the creep transition layer are precast layers made of modified polystyrene particle concrete. The precast insulation layer uses coarse-grained modified polystyrene particle concrete, while the creep transition layer uses fine-grained modified polystyrene particle concrete. Specifically, the degree of coarseness is relative; preferably, the particle size D of the coarse-grained modified polystyrene particles and the particle size d of the fine-grained modified polystyrene particles in the modified polystyrene particle concrete satisfy the following relationship: D ≥ kd, where k is 4-8, meaning the particle size D of the coarse particles is 4 to 8 times the particle size d of the fine particles. The particle size of the coarse-grained modified polystyrene particles conforms to the requirements for modified polystyrene particle concrete in the "Technical Specification for Application of Modified Polystyrene Particle Concrete in Hunan Province" (DBJ43 / T339—2019). The coarse-grained modified polystyrene particles can be selected with a diameter of 5-7 mm, and the fine-grained modified polystyrene particles are preferably selected with a diameter of 0.8-1.2 mm.

[0020] In this preferred embodiment, the outer waterproof layer is preferably a precast layer made of crack-resistant waterproof mortar, wherein the crack-resistant waterproof mortar is formed by mixing and adjusting a polymer emulsion with cement mortar, and has high bonding strength, which can adhere well to the surface of the creep transition layer.

[0021] In the above embodiments, it is preferable to extend and embed the pre-embedded part within the creep transition layer. An inner waterproof layer 4, covering the pre-fabricated insulation layer, can also be provided inside the pre-fabricated insulation layer. This inner waterproof layer 4 is preferably a pre-fabricated layer made of cement-based penetrating crystalline waterproofing material. When the inner waterproof layer comes into contact with the cast-in-place wall, the cement-based penetrating crystalline waterproofing material in the inner waterproof layer can dissolve in the water of the cast-in-place concrete, then penetrate into the micropores or capillary cracks of the concrete, undergoing an irreversible physicochemical reaction to form water-insoluble dendritic crystals. These crystals combine with the concrete to form a closed waterproof layer, achieving permanent waterproofing, thereby forming a second waterproofing system on the outside of the cast-in-place wall.

[0022] The prefabricated waterproof and heat-insulating wall panel of this utility model can be manufactured using the following production process, including the following steps:

[0023] S10. Prepare crack-resistant and waterproof mortar according to preset requirements, prepare fine-particle-size modified polystyrene particle concrete according to preset requirements, and prepare coarse-particle-size modified polystyrene particle concrete according to preset requirements.

[0024] S20. Set up the mold for the prefabricated insulation board according to the preset size and shape, and install the steel mesh and embedded connectors according to the preset position;

[0025] S30. Pour the crack-resistant and waterproof mortar prepared in step S10 into the mold and scrape the mortar to form the outer waterproof layer, and ensure that the outer waterproof layer reaches the preset thickness.

[0026] S40. Pump the fine-particle-size modified polystyrene particle concrete prepared in step S10 into the mold and cover it with the outer waterproof layer to form a creep transition layer, and ensure that the creep transition layer reaches the preset thickness.

[0027] S50. Pump the coarse-grained modified polystyrene particle concrete prepared in step S10 into the mold and cover it with a creep transition layer to form a prefabricated insulation layer, and ensure that the overall prefabricated insulation board reaches the preset thickness.

[0028] S60. Use a mechanical trowel to press and smooth the pre-fabricated insulation layer;

[0029] S70. Curing; demolding.

[0030] The thickness of the outer waterproof layer can be set to 1-2 mm, and the thickness of the creep transition layer can be set to 3-5 mm. In step S30, a 1-2 mm thick layer of crack-resistant waterproof mortar can be applied to the mold using a slurry scraper. In step S40, fine-particle modified polystyrene concrete can be pumped to the mold using a slurry pump, and the surface of the creep transition layer can be automatically smoothed using a slurry leveler. In step S50, coarse-particle modified polystyrene concrete can be pumped to the mold using a slurry pump, and the surface is rolled and pressed by mechanical wheels before being automatically smoothed to ensure the overall flatness of the precast waterproof insulation panel. This entire production process is also suitable for mechanized assembly line production.

[0031] In step S60 above, after smoothing and pressing the precast insulation layer, step S61 is also included: preparing cement-based penetrating crystalline waterproof mortar, spreading the waterproof mortar evenly to cover the inside of the precast insulation layer to form an inner waterproof layer, and ensuring that the inner waterproof layer reaches a preset thickness. This is to add a second waterproof layer to the inner surface of the precast insulation layer.

[0032] Based on the embodiments of this utility model, any modifications, equivalent substitutions, improvements, etc., made by all other embodiments obtained by those skilled in the art without creative effort should be included within the protection scope of this utility model.

Claims

1. A prefabricated waterproof insulation board for exterior walls, comprising a prefabricated insulation layer and an outer waterproof layer located outside the prefabricated insulation layer, wherein the prefabricated insulation layer is pre-embedded with a pre-embedded connector for connection to the main body of the exterior wall, characterized in that, A creep transition layer is provided between the outer waterproof layer and the prefabricated insulation layer, and the creep coefficient of the creep transition layer is located between the creep coefficient of the outer waterproof layer and the creep coefficient of the prefabricated insulation layer.

2. The prefabricated waterproof and thermal insulation board for exterior walls according to claim 1, characterized in that, The precast insulation layer is a precast layer made of coarse-grained modified polystyrene particle concrete.

3. The prefabricated waterproof and thermal insulation board for exterior walls according to claim 2, characterized in that, The creep transition layer is a precast layer made of fine-particle-modified polystyrene particle concrete.

4. The prefabricated waterproof and thermal insulation board for exterior walls according to claim 3, characterized in that, The particle size d of the modified polystyrene particles in the fine-particle-size modified polystyrene particle concrete and the particle size D of the modified polystyrene particles in the coarse-particle-size modified polystyrene particle concrete satisfy the relationship D≥kd, where k is 4-8.

5. The prefabricated waterproof and thermal insulation board for exterior walls according to claim 1, characterized in that, The pre-embedded connector extends within the creep transition layer.

6. The prefabricated waterproof and thermal insulation board for exterior walls according to claim 1, characterized in that, The inner side of the prefabricated insulation layer is also provided with an inner waterproof layer.

7. The prefabricated waterproof and thermal insulation board for exterior walls according to claim 6, characterized in that, The inner waterproof layer is a prefabricated layer made of cement-based penetrating crystalline waterproof material.

8. The prefabricated waterproof and thermal insulation board for exterior walls according to claim 1, characterized in that, The outer waterproof layer is a precast layer made of crack-resistant and waterproof mortar.

Images