Device for eliminating pore defect on surface of concrete

Abstract

The invention discloses a device for eliminating concrete surface pore defects, and relates to the technical field of concrete construction quality, the device comprises a roller storage unit, and a flexible scraper is wound on the outer side wall of the roller storage unit; the roller storage unit is connected with the input end of the rotary power unit; the rotary power unit is fixedly connected with the supporting and fixing frame through a flange; the roller storage unit is rotationally connected with the supporting and fixing frame through a bearing. According to the device for eliminating the pore defect on the surface of the concrete, the flexible scraping plate can be used in various special-shaped components, different lengths and widths can be adopted according to the template condition in the concrete engineering, and the requirements of different construction environments can be better met; furthermore, bubbles on the surface of the concrete are stripped from the concrete by virtue of through holes in the flexible scraper blade, and the surface of the concrete is flattened by virtue of a smooth surface on the flexible scraper blade, so that the surface of the concrete is smooth and flat after the mold is removed.

Description

Technical Field

[0001] This invention relates to the field of concrete construction quality technology, and in particular to a device for eliminating pore defects on the surface of concrete. Background Technology

[0002] In current construction projects, to improve crack resistance and durability, the water-cement ratio in concrete mix design is getting lower and lower. Admixtures such as water-reducing agents and air-entraining agents have become indispensable materials in concrete mix design. However, with the reduction of the water-cement ratio and the addition of admixtures such as water-reducing agents and air-entraining agents, the viscosity of cast-in-place concrete is also increasing. Traditional concrete vibration processes are difficult to completely remove air bubbles from the concrete. The removal of air bubbles after pouring with irregularly shaped formwork is an even greater challenge. More air bubbles adhere to the surface of the formwork and cannot be removed, reducing the appearance quality of the concrete and thus affecting its durability.

[0003] Studies have found that the pores on the surface of concrete are mainly circular or irregularly shaped holes with a diameter of no more than 25 mm. After hardening, the pores on the surface of concrete mainly come from air bubbles in the cast-in-place concrete. The formation of pores not only affects the appearance quality of concrete, but also has an adverse effect on the lifespan and durability of concrete structures.

[0004] In recent years, research on surface defects in cast-in-place concrete has increased significantly. Studies have revealed that the pores on concrete surfaces are mostly circular or elliptical, with the diameter of a single pore generally not exceeding 2.5 cm. To address the problem of honeycomb and pitted surfaces in concrete, numerous scholars have conducted research from different perspectives: First, by improving the raw materials themselves and increasing the flowability of the mix to reduce the number of air bubbles inside the concrete (see the 2025 graduate thesis "Research on the Preparation Technology and Influencing Factors of Fair-faced Concrete and its Appearance Quality" published by Central South University of Forestry and Technology); Second, by improving the formwork process and selecting different release agents to reduce the number of air bubbles on the concrete surface and improve the appearance quality (see the paper "The Influence of Concrete Performance and Formwork Process on Appearance Quality" published in Railway Construction, Issue 6, 2025); Third, by adding a breathable but waterproof membrane between the formwork and the cast-in-place concrete, the surface air bubbles can be removed.

[0005] However, the introduction and application of these measures have increased costs and changed traditional construction techniques, increasing construction difficulty and project costs. To solve these problems, it is necessary to develop a device to eliminate surface pores in concrete, so as to eliminate surface pores in concrete efficiently and conveniently. Summary of the Invention

[0006] The purpose of this invention is to provide a device for eliminating porosity defects on concrete surfaces, thereby solving the problems listed in the background art.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a device for eliminating pore defects on concrete surfaces, comprising a roller receiving unit, wherein a flexible scraper is wound around the outer wall of the roller receiving unit. The roller storage unit is connected to the input end of the rotary power unit; It also includes a support frame, and the rotary power unit is fixedly connected to the support frame via a flange; The roller storage unit is rotatably connected to the support frame via bearings.

[0008] Preferably, the flexible scraper is made of high-strength PVC material.

[0009] Preferably, the flexible scraper includes a through-hole area and a smooth surface area, and the through-hole area and the smooth surface area are arranged alternately.

[0010] Preferably, a plurality of through holes are uniformly formed in the through hole area.

[0011] Preferably, the diameter of each through hole is 3 cm.

[0012] Preferably, the support frame is a right-angle frame, one right-angle side of the right-angle frame is fixedly connected to the outer wall of the template, and a split bearing mounting seat is fixedly installed on the other right-angle side of the right-angle frame. The split bearing mounting seat is fixedly connected to the bearing through a bearing bush.

[0013] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention relates to a device for eliminating porosity defects on concrete surfaces. The flexible scraper can be used on various irregularly shaped components, such as curved surfaces, hyperboloids, and other complex surfaces. It has a simple structure, is easy to install and use, and has minimal impact on construction. The flexible scraper can be configured with different lengths and widths according to the formwork conditions in concrete engineering, thus better adapting to the requirements of different construction environments. Furthermore, by utilizing the through-hole area and smooth area on the flexible scraper, the process of eliminating pores and smoothing is carried out alternately, ensuring that each concrete area can be repeatedly eliminated, removing air bubbles from the concrete surface, and smoothing the concrete surface with the help of the smooth surface on the flexible scraper, thus achieving a smooth and flat concrete surface after demolding. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a three-dimensional schematic diagram of a device for eliminating pore defects on concrete surfaces according to the present invention. Figure 2This is a schematic diagram of the assembly of the roller storage unit and the support frame of the present invention.

[0016] Explanation of reference numerals in the attached drawings: 1. Flexible scraper; 2. Roller storage unit; 3. Rotation power unit; 4. Support frame; 5. Template. Detailed Implementation

[0017] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention 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 only used to explain the present invention and are not intended to limit the present invention.

[0018] like Figure 1-2 As shown, a device for eliminating pore defects on concrete surfaces includes a roller storage unit 2, on the outer wall of which a flexible scraper 1 is wound. The flexible scraper can be used on various irregularly shaped components, such as curved surfaces, hyperboloids, and other complex surfaces. It has a simple structure, is easy to install and use, and has minimal impact on construction. The flexible scraper can be of different lengths and widths depending on the formwork conditions in the concrete project, thus better adapting to the requirements of different construction environments. The roller storage unit 2 is connected to the input end of the rotary power unit 3; It also includes a support frame 4, and the rotary power unit 3 is fixedly connected to the support frame 4 via a flange; The roller storage unit 2 is rotatably connected to the support frame 4 via a bearing.

[0019] Specifically, the flexible scraper 1 is made of high-strength PVC material. Multiple through holes are evenly opened on the flexible scraper 1. Each through hole is arranged at intervals, which can alternately perform hole removal and smoothing operations on the concrete surface along the travel path, ensuring that each concrete area can be repeatedly hole removed. The diameter of each through hole is 3cm, so that the flexible scraper forms a smooth area and a through hole area. During operation, the through holes in the flexible scraper are used to remove air bubbles between the concrete mixture and the formwork contact surface. At the same time, the smooth part of the flexible scraper is used to smooth the concrete surface. During the process of withdrawing the flexible scraper, the concrete mixture is repeatedly passed through the contact surface between the formwork and the through hole area and the smooth area of ​​the flexible scraper to improve the appearance quality of the concrete surface. Furthermore, the flexible scraper can be reused after cleaning.

[0020] Specifically, the support frame 4 is a right-angle frame, one right-angle side of the right-angle frame is fixedly connected to the outer wall of the template 5, and a split bearing mounting seat is fixedly installed on the other right-angle side of the right-angle frame. The split bearing mounting seat is fixedly connected to the bearing through a bearing bush.

[0021] Instructions for use: After the concrete structure formwork is installed, the formwork must be coated with release agent. Before the concrete is poured, the roller storage unit is installed on the upper part of the outer wall of the formwork using the support and fixing frame. The roller storage unit is connected to the rotating power unit. At the same time, the flexible scraper is lowered from the roller storage unit. The flexible scraper is in close contact with the inner wall of the formwork, and release agent is also applied to the flexible scraper. When starting the concrete pouring, after each layer of concrete has been poured and vibrated, the rotary power unit is started, and the roller receiving unit is slowly controlled to ensure that the rising speed of the flexible scraper is no more than 5 mm / s. The flexible scraper is lifted upward along the inner wall of the formwork, and care should be taken not to pull the flexible scraper completely out of the concrete. A portion should be left in place until the next layer of concrete has been poured and vibrated before pulling it out, until the concrete pouring is completed.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for eliminating porosity defects on concrete surfaces, characterized in that: It includes a roller storage unit (2), on the outer side wall of which a flexible scraper (1) is wound. The roller storage unit (2) is connected to the input end of the rotary power unit (3); It also includes a support frame (4), and the rotary power unit (3) is fixedly connected to the support frame (4) via a flange; The roller storage unit (2) is rotatably connected to the support frame (4) via a bearing.

2. The device for eliminating porosity defects on concrete surfaces according to claim 1, characterized in that: The flexible scraper (1) is made of high-strength PVC material.

3. The device for eliminating porosity defects on concrete surfaces according to claim 2, characterized in that: The flexible scraper (1) includes a through-hole area and a smooth surface area, and the through-hole area and the smooth surface area are arranged alternately.

4. The device for eliminating porosity defects on concrete surfaces according to claim 3, characterized in that: Multiple through holes are evenly formed in the through hole area.

5. The device for eliminating porosity defects on concrete surfaces according to claim 4, characterized in that: The diameter of each of the aforementioned through holes is 3 cm.

6. The device for eliminating porosity defects on concrete surfaces according to claim 5, characterized in that: The support frame (4) is a right-angle frame. One right-angle side of the right-angle frame is fixedly connected to the outer wall of the template (5). A split bearing mounting seat is fixedly installed on the other right-angle side of the right-angle frame. The split bearing mounting seat is fixedly connected to the bearing through a bearing bush.

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