A thin rendering outer wall external thermal insulation protective layer cracking repair structure

Abstract

The utility model provides a kind of thin plastering outer wall outer thermal insulation protective layer cracking repair structure, including repair mortar, alkali-resistant glass fiber mesh, crack glue, sand-containing special paint (interface type), anti-cracking mortar layer and alkali-resistant mesh cloth, and the outer wall of base wall is provided with thermal insulation layer, the crack glue is used for protective layer cracking place, and it is repaired along the extension 10 centimeters of two sides of crack, sand-containing special paint (interface type) overall brushing strengthens bonding, sand-containing special paint is brushed and then repair mortar is applied, and the outer wall of repair mortar layer is provided with anti-cracking mortar layer, and the alkali-resistant mesh cloth is arranged in the anti-cracking mortar layer. The utility model is repaired on the basis that original thermal insulation layer is not removed to outer wall outer thermal insulation layer cracking, meets the use requirement, is friendly to environment, has little influence to community, and comprehensive economic cost is low.

Description

Technical Field

[0001] This utility model belongs to the field of building exterior wall repair technology, and specifically relates to a repair structure for cracks in the external insulation and protective layer of thin plaster exterior walls. Background Technology

[0002] Since the 1990s, my country has been promoting the application of thin-plastered external wall insulation systems. These systems have been used in multi-story buildings for over 20 years. However, with the increasing age of buildings and the service life of external wall insulation, problems such as cracking, water seepage, detachment, and even complete insulation layer detachment are becoming more prevalent and increasingly common. Complaints about insulation layer detachment, protective layer cracking, and water leakage caused by external wall insulation cracking are among the most frequent building complaints each year. Article 3.0.8 of the "Technical Specification for External Wall Insulation Engineering" (JGJ144-2019) states that "under normal use and maintenance conditions, the service life of external wall insulation engineering should not be less than 25 years." Some buildings have already reached this age. Currently, the main method for repairing cracks in the protective layer is patching and repairing, which results in cracks year after year. Moreover, the problem is not fundamentally solved and continues to accumulate and become more and more serious. There is no systematic analysis of the root cause of the problem, the cracking of the protective layer, and no mature technology or process for fundamentally solving it. Based on the above background, research on repair technology for cracks in the external thermal insulation protective layer of existing buildings is urgently needed.

[0003] Thin-plaster exterior wall insulation systems often experience problems such as cracking, hollowing, and detachment of the insulation layer, as well as water leakage in the exterior walls, due to quality defects in the protective layer plaster, alkali-resistant mesh, and water-resistant putty, as well as factors like temperature field and internal stress. Current thin-plaster exterior wall insulation systems use adhesive bonding and anchoring methods for connection. The insulation layer is subjected to tensile and shear forces and is significantly affected by negative wind pressure. Furthermore, the direct connection between the insulation layer and the plaster layer means that the significant difference in deformation rates between the two materials due to thermal expansion and contraction contributes to numerous problems. Summary of the Invention

[0004] This utility model addresses the technical problems existing in the prior art by providing a repair structure for cracks in the external thermal insulation protective layer of thin plastered exterior walls. It repairs cracks in the external thermal insulation protective layer of exterior walls without removing the original insulation layer, meeting usage requirements, being environmentally friendly, having minimal impact on the community, and having low overall economic costs.

[0005] The technical solution adopted by this utility model is: a repair structure for cracks in the external thermal insulation protective layer of a thin-plastered exterior wall, including a repair slurry layer, crack adhesive, sand-containing special paint (interface type), crack-resistant mortar layer, and alkali-resistant mesh. An insulation layer is provided outside the base wall, and the outermost part of the insulation layer is called the thermal insulation protective layer. The crack adhesive is located at the cracks in the thermal insulation protective layer. The sand-containing special paint (interface type) is located outside the thermal insulation protective layer. The repair slurry layer is located outside the sand-containing special paint (interface type). An crack-resistant mortar layer is provided outside the repair slurry layer, and an alkali-resistant mesh is provided inside the crack-resistant mortar layer.

[0006] As a preferred option, crack repair is used to repair cracks in the thermal insulation layer. This method is based on the principle of flexible repair and various materials such as crack-resistant mortar and putty can be applied to the surface of the crack repair adhesive, resulting in good compatibility.

[0007] As a preferred option, sand-containing special paint (interface type) can be used for surface treatments such as thermal insulation protective layers, plaster layers, and putty layers, and is a multi-functional interface material.

[0008] Preferably, the thickness of the repair slurry layer is 20-30 mm.

[0009] Preferably, the thickness of the crack-resistant mortar layer is 3-5 mm.

[0010] Working Principle: This technology utilizes a crack-reducing adhesive to disperse the deformation of the insulation layer itself and cracks caused by thermal changes. The deformation is no longer concentrated within the millimeter-level area of ​​the crack, but can extend to a range of 10 centimeters, significantly reducing the relative value of the deformation. To enhance adhesion between different materials, a sand-containing special paint (interface type) is used. Its inherent performance advantages make it suitable for various interfaces, exhibiting excellent compatibility with insulation layers, plaster layers, putty layers, and paint layers. A 20-30mm thick repair mortar is applied outside the interface agent. This transfers the deformation stress from the cracked insulation layer to the repair mortar layer. The lightweight nature of the repair mortar absorbs the stress, and its gradual release over a certain thickness achieves the purpose of repairing the cracks in the insulation layer. This effectively repairs the cracks at the source of the thin plaster defect, making the entire structural system more stable.

[0011] Compared with the prior art, the beneficial effects of this utility model are: this utility model can completely cure the cracking of the external wall insulation protective layer, thoroughly repair the root cause of the damage to the external wall insulation, make the whole system meet the usage requirements, extend the service life, be environmentally friendly, have little impact on the community, and have low overall economic cost. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0013] In the diagram: 1-base wall, 2-insulation layer, 3-crack sealant, 4-sand-containing special paint (interface type), 5-thick repair slurry layer, 6-alkali-resistant mesh cloth, 7-thick crack-resistant mortar layer, 8-flexible water-resistant putty, 9-coating finish. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] An embodiment of this utility model provides an overall repair structure for a thin-plastered exterior wall insulation system, such as... Figure 1 As shown, it includes crack adhesive 3, sand-containing special paint (interface type) 4, a 20-30mm thick repair mortar layer 5, alkali-resistant mesh cloth 6, a 3-5mm thick crack-resistant mortar layer 7, flexible water-resistant putty 8, and paint finish 9. An insulation layer 2 is installed outside the base wall 1, with the outermost layer called the insulation protective layer. The base wall 1 and the insulation protective layer are existing structures awaiting repair. The crack adhesive 3 is used to repair cracks in the insulation protective layer. The sand-containing special paint (interface type) 4 is located outside the insulation layer 2. The repair mortar layer 5 has a thickness of 20-30mm. An crack-resistant mortar layer 7 is installed outside the repair mortar layer 5, and an alkali-resistant mesh cloth 6 is installed inside the crack-resistant mortar layer 7. The crack-resistant mortar layer 7 has a thickness of 3-5mm. Flexible water-resistant putty 8 and paint finish 9 can be applied outside the crack-resistant mortar layer 7.

[0016] The present invention has been described in detail above through embodiments, but the content described is only an exemplary embodiment of the present invention and should not be considered as limiting the scope of implementation of the present invention. The protection scope of the present invention is defined by the claims. Any technical solutions designed by those skilled in the art using the technical solutions described in the present invention, or designed by those skilled in the art under the inspiration of the technical solutions of the present invention, within the substance and protection scope of the present invention, to achieve the above-mentioned technical effects, or any equivalent changes and improvements made to the scope of the application, shall still fall within the patent protection scope of the present invention.

Claims

1. A repair structure for cracks in the external insulation and protective layer of a thin-plastered exterior wall, characterized in that: The system includes a repair grout layer, crack adhesive, sand-containing paint, crack-resistant mortar layer, and alkali-resistant mesh. An insulation layer is installed on the outside of the base wall. The outermost layer of the insulation layer is called the insulation protection layer. The crack adhesive is located at the cracks in the insulation protection layer. The sand-containing paint is located on the outside of the insulation protection layer. The repair grout layer is located outside the sand-containing paint layer. An crack-resistant mortar layer is installed outside the repair grout layer. An alkali-resistant mesh is installed inside the crack-resistant mortar layer.

2. The repair structure for cracked thin-plastered exterior wall insulation and protective layer as described in claim 1, characterized in that: Crack sealant is used to repair cracks in the thermal insulation layer, extending the sealant to both sides of the crack location.

3. The repair structure for cracked thin-plastered exterior wall insulation and protective layer as described in claim 2, characterized in that: The outer side of the thermal insulation protective layer is coated with a special paint containing sand.

4. The repair structure for cracked thin-plastered exterior wall insulation and protective layer as described in claim 3, characterized in that: The thickness of the repair slurry layer is 20-30mm.

5. The repair structure for cracked thin-plastered exterior wall insulation and protective layer as described in claim 4, characterized in that: The thickness of the crack-resistant mortar layer is 3-5 mm.

Images