Roof waterproof repairing structure

Abstract

The utility model discloses a repairing structure for a leakage roof, which comprises a cement mortar interface layer, a waterproof roll and a protective film, the cement mortar interface layer, the waterproof roll and the protective film are sequentially arranged on a concrete roof, the waterproof roll is laid on the surface of the cement mortar interface layer in a wet manner, the protective film is laid on the surface of the waterproof roll, and a layer of neat cement paste is painted between the protective film and the waterproof roll to serve as a middle interface layer. The waterproof structure is convenient to construct, has a reflective heat insulation function, can reduce solar radiation heat absorption of a building, and is suitable for roof repairing projects with limited load capacity and energy-saving requirements.

Description

Technical Field

[0001] This utility model relates to a repair solution for leaking roofs, and in particular to a novel repair solution for leaking concrete roofs. Background Technology

[0002] Roof leaks are a common building problem that directly affects the quality of life for top-floor residents and the lifespan of the building. Different treatments are typically used for different types of roof leaks. For example, localized grouting can be used to treat cracks in eaves gutters and skylights. However, for severe leaks, such as those affecting more than 70% of the roof area, or serious overall leaks and aging of the waterproofing layer, the entire roof usually needs to be excavated and renovated. The traditional approach involves re-laying waterproofing membrane and then applying a layer of cement mortar to the surface. After hardening, this forms a protective layer to prevent the waterproofing membrane from being exposed to sunlight and to slow down its aging process. For example, in the existing technology patent ZL201520463086.1 "A Fully Sealed Waterproof System for Concrete Building Engineering", a waterproof membrane layer is laid on the top slab base surface of the building structure, and a 3-12mm cement mortar protective layer is provided on the waterproof membrane layer. This method requires the additional transportation of materials such as cement and sand during construction. For renovation projects of relatively old buildings with limited building age, it cannot guarantee the safety of the building and the convenience of construction. To reduce the absorption of solar radiation heat by buildings, some methods involve applying an interface treatment agent to the surface of the waterproof membrane, followed by a layer of light-colored paint or reflective heat-insulating coating. For example, the method described in Example 1 of the existing patent ZL202221988896.5, "A Thin Waterproof, Reflective, Heat-Insulating, and Energy-Saving Integrated System," not only provides protection for the waterproof membrane like a cement mortar protective layer but also has a certain reflective heat-insulating function. However, this coating is relatively thin, and its adhesion and durability will decrease over time, failing to provide a long-lasting reflective heat-insulating effect. Therefore, the above-mentioned traditional methods are not suitable for roof repair projects with limited load-bearing capacity and energy-saving requirements. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a new roof repair solution that is easy to maintain and construct and has integrated waterproof, reflective and heat insulation functions.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A roof waterproofing repair structure includes a cement mortar interface layer sequentially disposed on a concrete roof, a waterproof membrane wet-laid on the surface of the cement mortar interface layer, and a protective membrane laid on the waterproof membrane.

[0006] The cement mortar interface layer is formed by the cement mortar applied to the concrete roof surface after it has dried and hardened.

[0007] The waterproof membrane is a double-sided adhesive waterproof membrane, which includes a middle base layer and adhesive layers respectively bonded to both sides of the base layer;

[0008] The protective film includes a fluorocarbon composite film on the surface and a butyl rubber self-adhesive layer laminated on the fluorocarbon composite film.

[0009] It also includes an intermediate interface layer, which is formed by the drying and hardening of a layer of neat cement slurry applied between the protective membrane and the waterproof membrane layer.

[0010] The thickness of the cement mortar interface layer is 3mm to 5mm, the thickness of the waterproof membrane is 1.2mm to 2mm, and the thickness of the protective film is 0.4mm to 1.0mm.

[0011] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0012] 1. This utility model applies to roof repair solutions for exposed waterproof membranes. Compared to applying a cement mortar protective layer to the surface of the waterproof membrane, this utility model reduces the transportation of materials such as cement and sand during construction, making construction easier. The outermost protective film not only protects the inner waterproof membrane from sunlight and slows down aging, but also provides insulation for the building. Compared to applying a light-colored paint protective layer, the protective film offers superior waterproofing and durability, effectively blocking ultraviolet rays.

[0013] 2. The outermost layer of the protective film is a fluoropolymer resin with numerous carbon-fluorine bonds branched into its molecular structure. These bonds have a high chemical bond energy of 485 kJ / mol. Compared to the 426.9 kJ / mol energy of ultraviolet radiation in sunlight, the carbon-fluorine bond energy is significantly higher. Ultraviolet radiation cannot damage the fluorocarbon resin and therefore cannot penetrate the fluorocarbon resin layer, protecting the underlying organic polymer binder from damage by sunlight's ultraviolet rays. Due to the stability of the carbon-fluorine bonds, fluorocarbon resin is resistant to almost all chemicals and corrosive media. Furthermore, it is resistant to cold and heat. These advantages have earned fluorocarbon resin the reputation of being the "king of plastics" among organic materials. When applied to building roofs, it is durable and easy to install. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 Detailed drawings;

[0016] Figure 3 This is a schematic diagram of another preferred embodiment; Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] Example

[0019] like Figure 1 The structural diagram shown illustrates that the waterproof structure of this utility model includes a cement mortar interface layer 1 sequentially disposed on a concrete roof 4, a waterproof membrane 2 wet-laid on the surface of the cement mortar interface layer 1, and a protective film 3 laid on the surface of the waterproof membrane 2.

[0020] The cement mortar interface layer 1 is formed by applying a 3mm to 5mm thick layer of cement mortar to the roof surface. After drying and hardening, it forms a cement mortar interface layer 1 that meets the construction requirements. It is suitable for old roofs where the original base surface is not firm and direct construction is not possible.

[0021] Waterproof membrane 2 is a double-sided adhesive waterproof membrane that is wet-laid on the cement mortar interface layer 1, see Figure 2 As shown, the double-sided adhesive waterproof membrane includes a middle base layer 21 and adhesive layers 22 respectively bonded to both sides of the base layer 21. The total thickness is 1.2-2.0 mm. The base layer 21 can be made of conventional reinforcing materials such as PE film, PET film, PVC film, or tear-resistant fabric as the skeleton. The adhesive layers 22 bonded to both sides of the base layer 21 can be made of natural asphalt, modified asphalt, or hot melt adhesive. The modified asphalt can be a mixture of SBS modified asphalt, APP modified asphalt, and SBR modified asphalt, or the modified asphalt composite in the applicant's prior authorized patent ZL200910114456.X, which is a composition of asphalt mixed with functional additives, fillers, thickeners, and water.

[0022] Before laying the double-sided adhesive waterproof membrane, a layer of neat cement slurry is first applied to the cement mortar interface layer 1, and then the membrane is laid on top so that the adhesive layer 22 on the bottom surface is fully soaked in the neat cement slurry. During the cement curing process, the adhesive layer 22 on the bottom surface can form a tight bond with the cement mortar interface layer 1 through the synergistic effect of chemical bonding and physical crosslinking (CPS, see the applicant's prior authorized patent ZL200910114456.X). That is, the modified bitumen component of the adhesive layer 22 creeps into the capillary pores of cement and concrete during the solidification process of cement and concrete, and undergoes a chemical crosslinking reaction with them, resulting in mutual bonding.

[0023] A protective film 3 is applied to the surface of the double-sided adhesive waterproof membrane, see [link / description]. Figure 2 As shown, the protective film 3 includes a fluorocarbon composite film 31 on the surface and a butyl rubber self-adhesive layer 32 laminated on the fluorocarbon composite film 31. The butyl rubber self-adhesive layer 32 is self-adhesive to the adhesive layer 22 of the double-sided waterproof membrane. The thickness of the protective film 3 is 0.4 to 1.0 mm.

[0024] Fluorocarbon composite membrane 31 is formed by bonding a fluorocarbon membrane and a polymer-reinforced membrane together using solvent-based adhesives or by thermal welding. The surface fluorocarbon membrane has the functions of reflecting sunlight and insulating heat, and has excellent resistance to ultraviolet rays and aging. In recent years, it has been increasingly used as a surface material for building materials to improve the weather resistance of waterproof products, protecting the underlying waterproof membrane from ultraviolet damage and providing waterproof, reflective, and heat-insulating functions for buildings. Although fluorocarbon membranes have excellent weather resistance, their mechanical properties are not ideal, and their adhesion to other materials is not good, which limits their use. Therefore, combining fluorocarbon membranes with polymer-reinforced membranes can overcome this deficiency. This invention combines fluorocarbon membranes with PET membranes, utilizing the tensile strength, high elongation, and tear resistance of PET membranes to improve the performance of fluorocarbon membranes and prevent external damage and tearing of the surface layer.

[0025] like Figure 3 As shown, the preferred embodiment of this utility model is to apply a layer of neat cement slurry between the protective film 3 and the waterproof membrane layer 2 as an intermediate interface layer 5, which has a certain degree of impermeability and can prevent the asphalt component of the waterproof membrane adhesive layer 22 from penetrating into the upper butyl rubber self-adhesive layer 32, thereby causing the protective film 3 to turn black.

[0026] The construction method of this utility model includes the following steps:

[0027] 1. Clean the old roof, removing laitance, dust, and dirt from the roof surface. Apply a layer of cement mortar to the cleaned roof surface. After drying and hardening, a cement mortar interface layer with a thickness of 3mm to 5mm will be formed.

[0028] 2. First, apply a layer of neat cement slurry to the cement mortar interface layer 1, and then lay a layer of double-sided waterproof membrane 2 by wet laying.

[0029] 3. Dry-adhere a protective film 3 to the surface of the waterproof membrane 2, so that the protective film 3 and the adhesive layer of the waterproof membrane 2 are self-adhesive to each other; or first apply a layer of neat cement slurry to the waterproof membrane 2, and then lay the protective film 3, so that the upper and lower adhesive layers are bonded to each other during the cement curing process.

[0030] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A roof waterproofing repair structure, characterized in that: It includes a cement mortar interface layer sequentially set on the concrete roof, a waterproof membrane wet-laid on the surface of the cement mortar interface layer, and a protective film laid on the waterproof membrane; The cement mortar interface layer is formed by the cement mortar applied to the concrete roof surface after it has dried and hardened. The waterproof membrane is a double-sided adhesive waterproof membrane, which includes a middle base layer and adhesive layers respectively bonded to both sides of the base layer; The protective film includes a fluorocarbon composite film on the surface and a butyl rubber self-adhesive layer laminated on the fluorocarbon composite film.

2. The roof waterproofing repair structure as described in claim 1, characterized in that: It also includes an intermediate interface layer, which is formed by the drying and hardening of a layer of neat cement slurry applied between the protective membrane and the waterproof membrane layer.

3. The roof waterproofing repair structure as described in claim 2, characterized in that: The thickness of the cement mortar interface layer is 3mm to 5mm, the thickness of the waterproof membrane is 1.2mm to 2mm, and the thickness of the protective film is 0.4mm to 1.0mm.

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