A concrete micro crack automatic repairing structure

Abstract

The utility model provides a kind of concrete micro crack automatic repair structure, concrete structure includes mat layer, base layer and surface layer sequentially distributed from bottom to top, sets up automatic repair structure at the construction joint of first pouring section and post-pouring section of concrete structure, automatic repair structure waterstop and self-repairing microcapsule particle, waterstop is set with base layer middle part, waterstop extends along the length direction of construction joint, and its two sides respectively extend into first pouring section and post-pouring section;Self-repairing microcapsule particle is mixed distribution in the corresponding concrete of base layer;Self-repairing microcapsule band distribution is combined with base layer and surface layer, and extend along the length direction of construction joint.This structure is repaired by setting self-repairing microcapsule particle to the micro crack generated in base layer interior, needs manual intervention, greatly reduces the workload of artificial inspection and repair.

Description

Technical Field

[0001] This utility model belongs to the field of concrete self-healing technology, specifically relating to an automatic repair structure for micro-cracks in concrete. Background Technology

[0002] During the construction of concrete structures, due to factors such as construction techniques, material properties, and changes in ambient temperature, micro-cracks are prone to form at the construction joints between the pre-cast and post-cast sections of concrete. These micro-cracks may initially be small in width and not easily detected, but over time, under the influence of external factors such as groundwater infiltration, freeze-thaw cycles, and loads, the cracks will gradually expand, affecting the structural load-bearing capacity, durability, and waterproofing performance of the concrete.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and to provide an automatic repair structure for micro-cracks in concrete.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An automatic repair structure for micro-cracks in concrete is disclosed. The concrete structure comprises a subbase, a base layer, and a surface layer distributed sequentially from bottom to top. The automatic repair structure is installed at the construction joints of the pre-cast and post-cast sections of the concrete structure. The automatic repair structure includes: A waterstop is provided in the middle of the base layer and extends along the length of the construction joint, with its two sides extending into the pre-cast section and the post-cast section, respectively. Self-healing microcapsule particles, wherein the self-healing microcapsule particles are mixed and distributed in the concrete corresponding to the base layer; The self-healing microcapsule tape is distributed at the junction of the base layer and the surface layer and extends along the length of the construction joint.

[0006] Preferably, the self-healing microcapsule tape includes a flexible tape and self-healing microcapsule particles, with the self-healing microcapsule particles adhered to the upper surface of the flexible tape and the lower edge of the flexible tape adhered to the upper surface of the substrate.

[0007] Preferably, the self-healing microcapsule tape is bent in an S-shape along the length of the construction joint.

[0008] Preferably, the cushion layer is provided with a reinforcing groove corresponding to the construction joint, and the reinforcing groove is filled with concrete mixed with self-healing microcapsule particles.

[0009] Preferably, a waterproof membrane corresponding to the construction joint is provided above the reinforcing groove.

[0010] Preferably, the width of the waterproof membrane is greater than the width of the reinforcing groove.

[0011] Preferably, the base layer is provided with a steel reinforcement cage, and the steel reinforcement cages of the cast-in-place section and the post-cast section are connected to each other.

[0012] Beneficial effects: This structure uses self-healing microcapsule particles to self-repair microcracks inside the substrate, eliminating the need for manual intervention and greatly reducing the workload of manual inspection and repair. In addition, self-healing microcapsule tapes are used to reinforce construction joints, which effectively improves the repair ability of construction joints and enhances the crack resistance, waterproof performance and durability of concrete structures. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein: Figure 1 This is a top view of the automatic repair structure in a specific embodiment of the present invention; Figure 2 This is a cross-sectional view of the automatic repair structure in a specific embodiment of this utility model.

[0014] In the diagram: 1. Pre-cast section; 2. Post-cast section; 3. Construction joint; 4. Self-healing microcapsule tape; 5. Surface layer; 6. Base layer; 7. Subbase layer; 8. Waterstop; 9. Reinforcing groove; 10. Waterproof membrane. Detailed Implementation

[0015] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0016] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0018] like Figure 1-2 As shown, this application provides an automatic repair structure for micro-cracks in concrete. It utilizes self-healing microcapsule particles to repair concrete cracks. The self-healing microcapsule particles consist of a core and a wall, and are uniformly mixed into the concrete. The core is a repair agent with crack repair function, such as epoxy resin, polyurethane, or cement-based repair materials. The wall is a polymer material with certain strength and toughness, such as urea-formaldehyde resin or melamine-formaldehyde resin. During the pouring of the base layer 6 concrete, as the concrete sets and hardens, the self-healing microcapsule particles are uniformly distributed within the base layer 6 concrete. When micro-cracks occur at the construction joint 3, the self-healing microcapsule particles rupture, initiating the repair process, effectively sealing the cracks, preventing further crack propagation, and improving the overall performance and service life of the concrete structure.

[0019] The concrete structure provided in this application can be applied to roadbeds or building slabs, including a subbase 7, a base course 6, and a surface course 5 distributed sequentially from bottom to top. The subbase 7 is crushed stone or gravel, the base course 6 is concrete mixed with self-healing microcapsule particles, and the surface course 5 is ordinary concrete. An automatic repair structure is set at the construction joint 3 of the pre-cast section 1 and the post-cast section 2 of the concrete structure. The automatic repair structure includes a waterstop 8, self-healing microcapsule particles, and a self-healing microcapsule belt 4. The waterstop 8 is set in the middle of the base course 6, horizontally distributed, and extends along the length of the construction joint 3, with its two sides extending into the pre-cast section 1 and the post-cast section 2 respectively. The waterstop 8 can form the first waterproof and crack-resistant line at the concrete construction joint 3, effectively blocking external liquids from penetrating through the construction joint 3. At the same time, it can play a certain restraining role on the deformation of the base course 6 concrete, reduce stress concentration at the construction joint 3, and delay the occurrence of cracks. The waterstop 8 can be made of existing materials with good water-stopping and deformation adaptability, such as rubber waterstop 8, plastic waterstop 8, or metal waterstop 8. Its length extending into the pre-cast section 1 and the post-cast section 2 is determined according to the thickness of the concrete structure and the engineering design requirements.

[0020] Self-healing microcapsule particles are mixed and distributed in the concrete corresponding to the base layer 6. The self-healing microcapsule particles are evenly mixed into the concrete mixture at a ratio of 1% to 5% of the concrete volume. The self-healing microcapsule band 4 is distributed at the junction of the base layer 6 and the surface layer 5 and extends along the length of the construction joint 3. The setting of the self-healing microcapsule band 4 can specifically strengthen and repair the micro-cracks at the junction of the base layer 6 and the surface layer 5 and at the construction joint 3, thereby further improving the overall crack resistance of the concrete structure.

[0021] In this embodiment, the self-healing microcapsule tape 4 includes a flexible tape and self-healing microcapsule particles. The flexible tape is made of the same material as the capsule wall material of the self-healing microcapsule particles. The self-healing microcapsule particles are adhered to the upper surface of the flexible tape, and the lower edge of the flexible tape is adhered to the upper surface of the base layer 6. The flexible tape provides a fixed carrier for the self-healing microcapsule particles, thereby facilitating the construction of the self-healing microcapsule particles along a preset route and ensuring the stability of the self-healing microcapsule particles during the construction process.

[0022] In this embodiment, the self-healing microcapsule tape 4 is bent in an S-shape along the length of the construction joint 3. Compared with a straight structure, this increases the repair area of ​​the self-healing microcapsule tape 4 along the length of the construction joint 3, allowing the self-healing microcapsule tape 4 to better fit the interface between the base layer 6 and the surface layer 5. This ensures that when cracks occur in the construction joint 3, the self-healing microcapsule particles can accurately release the repair agent to effectively repair the cracks.

[0023] The subbase 7 is provided with a reinforcing groove 9 corresponding to the construction joint 3. The concrete poured in the reinforcing groove 9 is the same as the concrete of the base layer 6. It is also a concrete mixed with self-healing microcapsule particles, thereby enhancing the structural strength and crack resistance of the subbase 7 at the construction joint 3. The cross-sectional shape of the reinforcing groove 9 can be designed as rectangular, trapezoidal, etc., according to the actual needs of the project.

[0024] Furthermore, to enhance the waterproofing performance of construction joint 3 and form multiple waterproofing lines to effectively prevent rainwater, groundwater, and other liquids from seeping into the concrete structure through construction joint 3, a waterproof membrane 10 corresponding to construction joint 3 is installed above the reinforcing groove 9. The waterproof membrane 10 can be a polymer-modified bitumen waterproof membrane 10 or a synthetic polymer waterproof membrane 10. The width of the waterproof membrane 10 is greater than the width of the reinforcing groove 9, thus corresponding vertically to the reinforcing groove 9 and ensuring complete coverage of the reinforcing groove 9 and the area of ​​construction joint 3 where leakage may occur.

[0025] The base layer 6 is equipped with a steel reinforcement cage, and the steel reinforcement cages of the cast-in-place section and the post-cast section 2 are interconnected. The steel reinforcement cage can enhance the load-bearing capacity and crack resistance of the concrete in the base layer 6. Through the tensile action of the steel reinforcement, the shrinkage deformation of the concrete is effectively constrained, and the generation of cracks at the construction joint 3 is reduced.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be within the scope of protection of the pending claims of the present utility model.

Claims

1. An automatic repair structure for micro-cracks in concrete, characterized in that, The concrete structure includes a subbase, a base course, and a surface course, distributed sequentially from bottom to top. An automatic repair structure is installed at the construction joints of the pre-cast and post-cast sections of the concrete structure. The automatic repair structure includes: A waterstop is provided in the middle of the base layer and extends along the length of the construction joint, with its two sides extending into the pre-cast section and the post-cast section, respectively. Self-healing microcapsule particles, wherein the self-healing microcapsule particles are mixed and distributed in the concrete corresponding to the base layer; The self-healing microcapsule tape is distributed at the junction of the base layer and the surface layer and extends along the length of the construction joint.

2. The automatic repair structure for micro-cracks in concrete according to claim 1, characterized in that, The self-healing microcapsule tape includes a flexible tape and self-healing microcapsule particles. The self-healing microcapsule particles are adhered to the upper surface of the flexible tape, and the lower edge of the flexible tape is adhered to the upper surface of the substrate.

3. The automatic repair structure for micro-cracks in concrete according to claim 1, characterized in that, The self-healing microcapsule tape is bent in an S-shape along the length of the construction joint.

4. The automatic repair structure for micro-cracks in concrete according to claim 1, characterized in that, The cushion layer is provided with a reinforcing groove corresponding to the construction joint, and concrete mixed with self-healing microcapsule particles is poured into the reinforcing groove.

5. The automatic repair structure for micro-cracks in concrete according to claim 4, characterized in that, The reinforced groove is provided with a waterproof membrane corresponding to the construction joint.

6. The automatic repair structure for micro-cracks in concrete according to claim 5, characterized in that, The width of the waterproof membrane is greater than the width of the reinforcing groove.

7. The automatic repair structure for micro-cracks in concrete according to claim 1, characterized in that, The base layer is provided with a steel reinforcement cage, and the steel reinforcement cages of the cast-in-place section and the post-cast section are connected to each other.

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