Outer wall waterproof prefabricated insulation board and production process thereof

Abstract

The waterproof prefabricated heat preservation plate comprises a prefabricated heat preservation layer and an outer side waterproof layer located on the outer side of the prefabricated heat preservation layer, an embedded connecting piece connected with an outer wall body is embedded in the prefabricated heat preservation layer, and a creep transition layer is arranged between the outer side waterproof layer and the prefabricated heat preservation 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. The invention further discloses a production process of the waterproof prefabricated insulation board for the outer wall.

Description

Technical Field

[0001] The present invention relates to the technical field of assembled buildings, and in particular to an exterior wall waterproof prefabricated insulation board and a production process thereof. Background Art

[0002] Existing prefabricated insulation panels for exterior walls are usually prefabricated in factories and connected to the outside of the exterior wall by bonding, anchoring or hanging. In order to achieve waterproofing of the exterior wall, a waterproof coating is usually applied to the outside of the exterior wall, which greatly increases the cost of secondary construction of the exterior wall.

[0003] In order to reduce the overall construction cost of the building, the prior art has seen the emergence of a method of prefabricating a waterproof layer on the outside of the prefabricated insulation board for the exterior wall during factory prefabrication to form a waterproof prefabricated insulation board for the exterior wall, and then transporting the waterproof prefabricated insulation board for the exterior wall to the construction site and combining it with the main body of the exterior wall to achieve waterproofing of the exterior wall. However, due to the large difference in creep coefficients between the concrete material used in the prefabricated insulation layer and the waterproof material used in the waterproof layer, during long-term use, it is easy for the waterproof layer and the prefabricated insulation layer to produce micro cracks in the waterproof layer due to repeated creep stress, causing the waterproof layer to fail and causing water seepage in the exterior wall; or even the waterproof layer to fall off, causing safety problems. Summary of the invention

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

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: constructing a waterproof prefabricated insulation board for an exterior wall, 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 an embedded connecting piece connected to the exterior wall body, and 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 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 a prefabricated layer made of coarse-grained modified polystyrene particle concrete, so as to reduce the bulk density of the board while ensuring the thermal insulation performance of the wall, thereby facilitating transportation and installation.

[0007] Furthermore, the creep transition layer is a prefabricated layer made of fine-grained modified polystyrene particle concrete, so that it can be reliably combined with the prefabricated insulation layer made of coarse-grained modified polystyrene particle concrete. At the same time, the porosity in the fine-grained modified polystyrene particle concrete is small, which further improves the waterproof performance of the outside of the board. Its density value is higher, which improves the overall compression and flexural resistance of the board and facilitates transportation.

[0008] Furthermore, the particle size d of the modified polystyrene particles in the fine-grained modified polystyrene particle concrete and the particle size D of the modified polystyrene particles in the coarse-grained modified polystyrene particle concrete satisfy the relationship D≥kd, where the k value is 4-8, which not only ensures the creep transition between the outer waterproof layer and the prefabricated insulation layer, but also can reliably combine the two together.

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

[0010] Furthermore, an inner waterproof layer is provided on the inner side of the prefabricated thermal insulation layer, which further improves the waterproof performance of the outer wall.

[0011] Furthermore, the inner waterproof layer is a prefabricated layer made of a cement-based permeable crystalline waterproof material, and the crystallization property of the waterproof material when it comes into contact with water is used to construct a second waterproof barrier on the outside of the exterior wall.

[0012] Furthermore, the outer waterproof layer is a prefabricated layer made of anti-crack waterproof mortar, to which polymer latex and cement are usually added, and can be reliably combined with the creep transition layer.

[0013] Another technical problem to be solved by the present invention is to provide a production process for exterior wall waterproof prefabricated insulation boards, aiming at the problem that the waterproof layer of the exterior wall waterproof prefabricated insulation boards manufactured by the production process of the exterior wall waterproof prefabricated insulation boards in the prior art fails or even falls off due to the large difference in the creep coefficient.

[0014] The technical solution of the present invention to solve another technical problem is to construct a production process of the above-mentioned external wall waterproof prefabricated insulation board, including the following steps: S10. Prepare anti-cracking and waterproof mortar according to preset requirements, prepare fine-grained modified polystyrene particle concrete according to preset requirements, and prepare coarse-grained modified polystyrene particle concrete according to preset requirements; S20. Set the mold of the prefabricated insulation board according to the preset size and shape, and set up the steel mesh and embedded connectors according to the preset position; S30. Pour the anti-cracking waterproof mortar prepared in step S10 into the mold and scrape it to form an outer waterproof layer, and ensure that the outer waterproof layer reaches a preset thickness; S40. Pump the fine-grained modified polystyrene particle concrete prepared in step S10 into the mold and cover the outer waterproof layer to form a creep transition layer, and ensure that the creep transition layer reaches a preset thickness; S50. Pump the coarse-grained modified polystyrene particle concrete prepared in step S10 into the mold and cover the creep transition layer to form a prefabricated insulation layer, and ensure that the overall prefabricated insulation board reaches a preset thickness; S60. Use a mechanical trowel to squeeze and smooth the prefabricated insulation layer; S70. Curing; demoulding.

[0015] Furthermore, in the step S60, after the prefabricated insulation layer is extruded and smoothed, the following steps are further included: S61. Prepare cement-based penetrating crystalline waterproof mortar, spread the waterproof mortar evenly on the inner side of the prefabricated insulation layer to form an inner waterproof layer, and ensure that the inner waterproof layer reaches the preset thickness.

[0016] The implementation of the present invention of an exterior wall waterproof prefabricated insulation board and its production process has the following beneficial effects: by setting a creep transition layer between the outer waterproof layer and the prefabricated insulation layer, and setting the creep coefficient of the creep transition layer between the creep coefficient of the outer waterproof layer and the creep coefficient of the prefabricated insulation layer, the relative creep between the outer waterproof layer and the prefabricated insulation layer is transitioned, so that the creep of the outer waterproof layer relative to the creep transition layer, which is the base layer, is smaller than before, and the creep stress is controlled within a reasonable range, thereby greatly reducing the generation of micro cracks and ensuring the effectiveness of exterior wall waterproofing; at the same time, the outer waterproof layer is tightly combined with the outer side of the creep transition layer, which can effectively prevent falling off and ensure safety.

[0017] Furthermore, using coarse-grained modified polystyrene particle concrete to make a prefabricated insulation layer can ensure the insulation performance of the entire wall panel; using fine-grained modified polystyrene particle concrete to make a creep transition layer, on the one hand, the porosity of fine-grained modified polystyrene particle concrete is small, which can further improve the waterproof performance of the outer side of the entire board; on the other hand, the density of fine-grained modified polystyrene particle concrete is higher than that of coarse-grained modified polystyrene particle concrete, that is, the density of the creep transition layer is greater than that of the prefabricated insulation layer, which improves the bending and folding resistance of the entire board and facilitates transportation. At the same time, the creep transition layer and the prefabricated insulation layer are both made of modified polystyrene particle concrete, making the combination of the two closer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 Shown is a schematic structural diagram of a preferred embodiment of the exterior wall waterproof prefabricated insulation board of the present invention. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] like Figure 1 As shown, in the preferred embodiment of the external wall waterproof prefabricated insulation board of the present invention, it mainly includes a prefabricated insulation layer 3, an outer waterproof layer 1 arranged outside the prefabricated insulation layer 3, and a creep transition layer 2 arranged between the outer waterproof layer 1 and the prefabricated insulation layer 3. The prefabricated insulation layer 3 is pre-embedded with an embedded connector (not shown in the figure), which is connected to the external wall body so that the entire external wall waterproof prefabricated insulation board can be reliably connected to the outside of the external wall body. It is preferred to set the creep coefficient P of the creep transition layer between the creep coefficient P1 of the external waterproof layer and the creep coefficient P2 of the prefabricated insulation layer, that is, P2>P>P1. In this way, 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 external waterproof layer are avoided, the effectiveness of the external waterproof is ensured, and the shedding of the external waterproof layer is avoided.

[0022] In the present invention, it is preferred that both the prefabricated insulation layer and the creep transition layer are prefabricated layers made of modified polystyrene particle concrete, wherein the prefabricated insulation layer adopts coarse-grained modified polystyrene particle concrete, and the creep transition layer adopts fine-grained modified polystyrene particle concrete. Specifically, the coarseness and fineness are relative, and it is best to set 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 to satisfy the following relationship: D≥kd, wherein the k value is 4-8, that is, 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 meets the requirements of the "Technical Code for the Application of Modified Polystyrene Particle Concrete Engineering in Hunan Province" (DBJ43 / T339-2019) for modified polystyrene particle concrete, wherein the coarse-grained modified polystyrene particles can be selected from modified polystyrene particles with a diameter of 5-7 mm, and the fine-grained modified polystyrene particles are preferably selected from modified polystyrene particles with a diameter of 0.8-1.2 mm.

[0023] In this preferred embodiment, the outer waterproof layer is preferably a prefabricated layer made of anti-crack waterproof mortar, wherein the anti-crack waterproof mortar is formed by mixing a high molecular polymer emulsion and cement mortar, has high bonding strength, and can adhere well to the surface of the creep transition layer.

[0024] In the above embodiment, it is preferred that the embedded parts are extended and embedded in the creep transition layer. An inner waterproof layer 4 covering the prefabricated thermal insulation layer may also be provided on the inner side of the prefabricated thermal insulation layer. The inner waterproof layer 4 is preferably a prefabricated layer made of a cement-based permeable crystalline waterproof material. When the inner waterproof layer is in contact with the cast-in-place wall, the cement-based permeable crystalline waterproof material in the inner waterproof layer can be dissolved in the water of the cast-in-place concrete, and then penetrate into the micropores or capillary gaps of the concrete, and an irreversible physical and chemical reaction occurs to form water-insoluble dendrite-like crystals. The crystals are combined with the concrete to form a closed waterproof layer, achieving the purpose of permanent waterproofing, thereby forming a second waterproof system on the outside of the cast-in-place wall.

[0025] In a preferred embodiment of the production process of the exterior wall waterproof prefabricated insulation board of the present invention, the following steps are preferably included: S10. Prepare anti-cracking and waterproof mortar according to preset requirements, prepare fine-grained modified polystyrene particle concrete according to preset requirements, and prepare coarse-grained modified polystyrene particle concrete according to preset requirements; S20. Set the mold of the prefabricated insulation board according to the preset size and shape, and set up the steel mesh and embedded connectors according to the preset position; S30. Pour the anti-cracking waterproof mortar prepared in step S10 into the mold and scrape it to form an outer waterproof layer, and ensure that the outer waterproof layer reaches a preset thickness; S40. Pump the fine-grained modified polystyrene particle concrete prepared in step S10 into the mold and cover the outer waterproof layer to form a creep transition layer, and ensure that the creep transition layer reaches a preset thickness; S50. Pump the coarse-grained modified polystyrene particle concrete prepared in step S10 into the mold and cover the creep transition layer to form a prefabricated insulation layer, and ensure that the overall prefabricated insulation board reaches a preset thickness; S60. Use a mechanical trowel to squeeze and smooth the prefabricated insulation layer; S70. Curing; demoulding.

[0026] In the preferred embodiment of the production process of the above-mentioned external wall waterproof prefabricated insulation board, 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 slurry scraper can be used to scrape 1-2 mm thick anti-cracking waterproof mortar on the mold; in step S40, a slurry pump can be used to pump fine-grained modified polystyrene particle concrete to the mold platform, and a scraper can be used to automatically scrape the surface of the creep transition layer; in step S50, a slurry pump can be used to pump coarse-grained modified polystyrene particle concrete to the mold platform, and a mechanical wheel can be used to roll and squeeze the surface and then automatically smooth it to ensure that the entire external wall waterproof prefabricated insulation board has a smooth appearance. In this way, the entire production process is also suitable for production on a mechanized assembly line.

[0027] In the preferred embodiment of the production process of the above-mentioned external wall waterproof prefabricated insulation board, in step S60, after the prefabricated insulation layer is extruded and smoothed, step S61 is also included. Cement-based permeable crystallization waterproof mortar is prepared, and the waterproof mortar is spread and covered on the inner side of the prefabricated insulation layer to form an inner waterproof layer, and the inner waterproof layer is ensured to reach a preset thickness, so as to add a second waterproof layer on the inner surface of the prefabricated insulation layer.

[0028] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work, any modifications, equivalent substitutions, improvements, etc. made should be included in the protection scope of the present invention.

Claims

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

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

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

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

5. The waterproof prefabricated insulation board for exterior walls according to claim 1, characterized in that: The embedded connection piece is extended and arranged in the creep transition layer.

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

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

8. The exterior wall waterproof prefabricated insulation board according to claim 1, characterized in that: The outer waterproof layer is a prefabricated layer made of anti-cracking waterproof mortar.

9. A production process of the external wall waterproof prefabricated insulation board as claimed in claim 1, characterized in that: The following steps are involved: S10. Prepare anti-cracking and waterproof mortar according to preset requirements, prepare fine-grained modified polystyrene particle concrete according to preset requirements, and prepare coarse-grained modified polystyrene particle concrete according to preset requirements; S20. Set the mold of the prefabricated insulation board according to the preset size and shape, and set up the steel mesh and embedded connectors according to the preset position; S30. Pour the anti-cracking waterproof mortar prepared in step S10 into the mold and scrape it to form an outer waterproof layer, and ensure that the outer waterproof layer reaches a preset thickness; S40. Pump the fine-grained modified polystyrene particle concrete prepared in step S10 into the mold and cover the outer waterproof layer to form a creep transition layer, and ensure that the creep transition layer reaches a preset thickness; S50. Pump the coarse-grained modified polystyrene particle concrete prepared in step S10 into the mold and cover the creep transition layer to form a prefabricated insulation layer, and ensure that the overall prefabricated insulation board reaches a preset thickness; S60. Use a mechanical trowel to squeeze and smooth the prefabricated insulation layer; S70. Curing; demoulding.

10. The production process of the external wall waterproof prefabricated insulation board according to claim 9, characterized in that: In the step S60, after the prefabricated thermal insulation layer is extruded and smoothed, the following steps are also included: S61. Prepare cement-based penetrating crystalline waterproof mortar, spread the waterproof mortar evenly on the inner side of the prefabricated insulation layer to form an inner waterproof layer, and ensure that the inner waterproof layer reaches the preset thickness.

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