Flat-type lightweight aerated concrete panels, lightweight aerated concrete panel structures and buildings

Abstract

To provide a flat lightweight aerated concrete panel, a lightweight aerated concrete panel structure and a building that can make linear scratches on the panel surface inconspicuous without impairing the flat design.SOLUTION: Provided is a flat lightweight aerated concrete panel including a panel body made of lightweight aerated concrete. The flat lightweight aerated concrete panel includes a plurality of grooves provided in a substantially straight line along the long side direction on the surface of the panel body. The groove width is more than 0 mm and less than 7 mm. The groove depth is more than 0 mm and less than 4 mm. Grooves are provided at predetermined intervals.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a flat lightweight cellular concrete panel, a lightweight cellular concrete panel structure, and a building.

Background Art

[0002] Lightweight cellular concrete (ALC: Autoclaved Lightweight aerated Concrete) panels are widely used as building materials with excellent characteristics such as light weight, heat insulation, non-combustibility, and fire resistance for building walls, roofs, floors, etc.

[0003] When manufacturing an ALC panel, additives such as aluminum powder are added to main raw materials such as silica and cement and kneaded. The resulting mixture is poured into a predetermined mold, and while the mixture is foamed by a chemical reaction, it is gradually cured at the same time. Then, when the mixture reaches a semi-cured state, it is cut into a predetermined panel shape with a piano wire or the like, and then cured using an autoclave (high-temperature and high-pressure steam kettle) to obtain a completely cured ALC panel (for example, Patent Document 1).

[0004] The panels obtained in this way are generally produced as panels with a flat plane (flat panels) for manufacturing convenience. As features of flat panels, they bring a steady design sense that fits any building shape, enhance the design sense of design panels used as accents, and enhance the design sense of other members (such as entrance doors) that match openings and outer wall panels. They have been popular for a long time.

[0005] On the other hand, enhancing the surface design by imparting grooves or uneven patterns to the panel surface has also been carried out (for example, Patent Document 2).

[0006] ALC panels can generally acquire scratches, dents, and other damage to their surface during (1) the manufacturing process at the factory, (2) the transportation process to the site, and (3) the construction process at the site.

[0007] For example, (1) during the manufacturing process at the factory, when the ALC is cut to the specified panel thickness using piano wire or similar tools while it is still semi-hardened, linear scratches may occur on the cut surface (panel surface). Also, (2) during the transportation process to the site, multiple ALC panels are stacked to form blocks, and these blocks are transported together to the site. During loading and unloading, linear scratches may occur on the panel surface. Furthermore, (3) during the construction process at the site, after unloading, the ALC panels are processed to the specified shape using power tools or similar tools as needed, and then fastened to the exterior wall substrate of the building using screws or similar tools. During these construction processes, for example, the panels may be scratched by tools, by safety harnesses worn by workers, or by steel materials of temporary scaffolding, resulting in linear scratches, dents, and other damage. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2013-199408 [Patent Document 2] Japanese Patent Publication No. 2001-200602 [Overview of the project] [Problems that the invention aims to solve]

[0009] These linear scratches are minute, about 0.1mm to 2mm wide, and do not reduce the strength of the panel. However, especially with flat ALC panels, if linear scratches occur within a certain range, the scratches become noticeable even after painting due to the flat surface, and even if there is no structural problem, it leads to a deterioration in appearance.

[0010] This invention was proposed in view of the above-mentioned conventional circumstances, and the object of this invention is to provide a flat-type lightweight aerated concrete panel, a lightweight aerated concrete panel structure, and a building that can make linear scratches and the like on the panel surface less noticeable without impairing the flat design appearance. [Means for solving the problem]

[0011] [1] A flat-type lightweight aerated concrete panel comprising a roughly rectangular plate-shaped panel body made of lightweight aerated concrete, The panel body has a plurality of grooves provided on its surface in a substantially straight line along the longer side direction, The width of the groove is greater than 0 mm and less than 7 mm. Furthermore, the depth of the groove is greater than 0 mm and less than 4 mm. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals. [2] A flat-type lightweight aerated concrete panel comprising a roughly rectangular plate-shaped panel body made of lightweight aerated concrete, The panel body has a plurality of grooves arranged substantially in a straight line along the short side direction on its surface, The width of the groove is greater than 0 mm and less than 7 mm. Furthermore, the depth of the groove is greater than 0 mm and less than 4 mm. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals. [3] A flat-type lightweight aerated concrete panel comprising a roughly rectangular plate-shaped panel body made of lightweight aerated concrete, The panel body has a plurality of grooves provided on its surface in a substantially straight line along the longer side and a plurality of grooves provided in a substantially straight line along the shorter side, The width of the groove is greater than 0 mm and less than 7 mm. Furthermore, the depth of the groove is greater than 0 mm and less than 4 mm. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals. [4] A flat-type lightweight aerated concrete panel comprising a roughly rectangular plate-shaped panel body made of lightweight aerated concrete, The panel body has a plurality of grooves arranged in a wavy pattern along the long side direction or the short side direction, The width of the groove is greater than 0 mm and less than 7 mm. Furthermore, the depth of the groove is greater than 0 mm and less than 4 mm. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals. [5] A flat-type lightweight aerated concrete panel according to any one of [1] to [4], wherein the width of the groove is greater than 0 mm and 4 mm or less. [6] A flat-type lightweight aerated concrete panel according to any one of [1] to [5], wherein the width of the groove is greater than 0 mm and less than or equal to 2 mm. [7] A flat-type lightweight aerated concrete panel according to any of [1] to [6], wherein the width of the groove is 0.3 mm or more and 2 mm or less. [8] A flat-type lightweight aerated concrete panel according to any of [1] to [7], wherein the depth of the groove is 0.3 mm or more and less than 4 mm. [9] A flat-type lightweight aerated concrete panel according to any one of [1] to [8], wherein the depth of the groove is 0.3 mm or more and 2 mm or less.

[10] A flat-type lightweight aerated concrete panel according to any of [1] to [9], wherein the spacing between the grooves is greater than 0 mm and 100 mm or less.

[11] A flat-type lightweight aerated concrete panel according to any of [1] to

[10] , wherein the spacing between the grooves is 10 mm or more and 60 mm or less.

[12] The flat lightweight cellular concrete panel according to any one of [1] to

[11] , wherein the interval between the grooves is 10 mm or more and 30 mm or less.

[13] A lightweight cellular concrete panel structure, wherein a coating is applied to the surface of the flat lightweight cellular concrete panel according to any one of [1] to

[12] .

[14] A building provided with the lightweight cellular concrete panel structure according to

[13] .

Effect of the Invention

[0012] In the present invention, it is possible to provide a flat lightweight cellular concrete panel, a lightweight cellular concrete panel structure, and a building that can make linear scratches or the like on the panel surface less noticeable without impairing the flat design feeling.

Brief Description of the Drawings

[0013] [Figure 1] It is a plan view schematically showing a configuration example of the lightweight cellular concrete panel according to the first embodiment. [Figure 2] It is a plan view schematically showing a linear scratch in the long side direction of the panel. [Figure 3] It is a plan view schematically showing a configuration example of the lightweight cellular concrete panel according to the second embodiment. [Figure 4] It is a plan view schematically showing a linear scratch in the short side direction of the panel. [Figure 5] It is a plan view schematically showing a configuration example of the lightweight cellular concrete panel according to the third embodiment. [Figure 6] It is a plan view schematically showing linear scratches in the long side direction and the short side direction of the panel. [Figure 7] It is a plan view schematically showing a configuration example of the lightweight cellular concrete panel according to the fourth embodiment. [Figure 8] It is a plan view schematically showing a linear scratch in the diagonal direction of the panel. [Figure 9] This is a photograph showing the panel of an example. [Figure 10] This photograph shows a flat panel as an example of an embodiment, and a design panel as a reference example. [Figure 11] This is a photograph showing the condition of a comparative example panel that had linear scratches applied to it after painting. [Modes for carrying out the invention]

[0014] The following describes in detail an exemplary embodiment of the present invention (hereinafter abbreviated as "this embodiment"). The present invention is not limited to this embodiment and can be implemented in various modifications within the scope of its gist. In this specification, the upper and lower limits of each numerical range can be arbitrarily combined.

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings. <Lightweight cellular concrete panel> (First embodiment) Figure 1 is a plan view showing an example configuration of a lightweight aerated concrete panel (hereinafter referred to as an ALC panel) according to this embodiment. Figure 2 is a plan view schematically showing linear scratches along the long side of the panel (note that grooves are omitted in Figure 2. The same applies to Figures 4, 6, and 8 shown later). The ALC panel 1 according to this embodiment comprises a substantially rectangular plate-shaped panel body 10 made of lightweight aerated concrete, and has a plurality of grooves 11 provided on the surface of the panel body 10 in a substantially straight line along the long side direction. Note that the surface of the panel body 10 refers to the wide main surface of the plate-shaped panel body 10. Furthermore, the ALC panel 1 according to this embodiment is a flat panel, and "flat panel" means that it has a generally flat texture when viewed from a distance, specifically, for example, from about 5m or more away, and is different from a design panel that creates shadows and makes patterns visible through relatively large irregularities, as will be described later.

[0016] Examples of lightweight aerated concrete include ALC as described in JIS A5416. For example, lightweight aerated concrete can be described as a hardened body with a bulk density of about 0.1 to 1.0, in which a large amount of air bubbles are mixed in, mainly using cement, calcareous raw materials, siliceous raw materials, and water as raw materials, and which is embedded inside as reinforcing material.

[0017] The size of the panel body 10 is not particularly limited, but as an example, the panel body 10 shown in the figure has a long side of 1820 mm, a short side of 606 mm, and a thickness of 37 mm, forming a roughly rectangular plate shape. However, an error of approximately ±2 mm in the external dimensions of the panel during design and manufacturing is permitted. Furthermore, reinforcing bars, reinforcing nets, etc. (not shown), may be embedded inside the panel body 10 to ensure strength.

[0018] On one surface of the panel body 10, a plurality of substantially straight grooves 11 are formed at predetermined intervals, substantially parallel to the long side of the panel body 10. In this specification, "approximately straight line" includes not only straight lines drawn with a ruler, but also lines that are somewhat meandering, such as those drawn freehand.

[0019] The width (maximum width) of the groove 11 is preferably greater than 0 mm and less than 7 mm, more preferably greater than 0 mm and 4 mm or less, more preferably greater than 0 mm and 2 mm or less, and even more preferably 0.3 mm or more and 2 mm or less. The depth (maximum depth) of the groove 11 is preferably greater than 0 mm and less than 4 mm, greater than 0.3 mm and less than 4 mm, and more preferably 0.3 mm or more and 2 mm or less.

[0020] The spacing between these grooves 11 is greater than 0 mm and 100 mm or less, preferably 10 mm or more and 60 mm or less, and more preferably 10 mm or more and 30 mm or less.

[0021] In this invention, the groove depth refers to the dimension of the deepest part, the groove width refers to the dimension of the widest part, and the groove spacing refers to the dimension from the center of the groove width to the center of an adjacent groove.

[0022] By setting the width, depth, and spacing of the grooves 11 within the above range, linear scratches on the panel surface become difficult to see after painting. In other words, linear scratches on the panel surface can be made less noticeable. Furthermore, the flat design appearance is not compromised as long as the width, depth, and spacing remain within this range. Furthermore, the multiple grooves 11 provided in the direction of the longer side may have the same width, depth, and spacing, or they may be different (random), as long as they are within the above range.

[0023] If the width, depth, and spacing of the grooves 11 are greater than the above range, the effect of making linear scratches less noticeable after painting will not be sufficiently achieved. Also, a flat design appearance will not be sufficiently achieved; in other words, it will look like a design panel. On the other hand, if the width, depth, and spacing of the grooves 11 are smaller than the above range, it will be technically difficult to form the grooves 11 accurately on the panel surface during manufacturing (due to errors in panel thickness, etc.).

[0024] In particular, in the ALC panel 1 shown in Figure 1, multiple grooves 11 are formed approximately parallel to the long side of the panel body 10, which makes it possible to more effectively conceal linear scratches 50a that occur along the long side of the panel body 10, as shown in Figure 2.

[0025] Furthermore, it is preferable that the angle of these grooves 11 is not inclined but approximately right-angle, as this resembles the shape of scratches and makes the scratches less noticeable. The groove angle refers to the angle of the side portion of the groove that connects the panel surface and the bottom surface of the groove. From a manufacturing standpoint, it is possible to either provide a slope on the side of the groove 11 or not. However, when the width and depth of the groove 11 are relatively large (for example, around 3-4 mm), it is preferable to provide a slight slope from the viewpoint of ensuring a uniform painted surface. From this viewpoint, it is preferable that the angle of the side portion of the groove 11 be in the range of greater than 0 degrees and up to 75 degrees (making the groove width on the panel surface side wider than the bottom width). The side of the groove 11 may also be curved.

[0026] Such grooves 11 can be formed in a factory or the like by, for example, cutting with a cutting blade, or by molding by pressing a mold onto the ALC panel while it is still soft.

[0027] The ALC panel of the present invention incorporates a design that patterns the linear scratch shapes that are likely to occur during the manufacturing, transportation, or installation of the panel. Even if such scratches occur, the panel surface is pre-applied with a similar linear pattern so that they can be visually recognized as part of the design.

[0028] It should be noted that the ALC panel of the present invention is a flat panel and differs from so-called design panels (panels with decorative patterns) that enhance their aesthetic appeal by adding grooves or embossed patterns to the surface of the ALC panel. In such design panels, the depth of the grooves or recesses is generally set to 4 mm or more, so that the relatively large embossing creates shadows and makes the pattern visible (see the upper part of Figure 10 shown below).

[0029] In contrast, the ALC panel of the present invention is designed to maintain the flat aesthetic appearance, similar to conventional flat panels, by forming shallow linear grooves of less than 4 mm in depth at close intervals. This makes it possible to create a wall design that does not feel out of place, even when used in combination with design panels used as accents.

[0030] Furthermore, while completely flat panels have the problem of uneven paint application during painting, the ALC panel of the present invention has shallow grooves 11, which makes such uneven paint application less likely and improves the finish of the paintwork. Furthermore, when installing the panels, in the case of design panels, the groove depth is large, making it difficult to smooth the sealant with a spatula after filling. However, with the ALC panel of the present invention, the groove 11 is shallow, which has the advantage of making the sealing work between panels easier.

[0031] Thus, according to the present invention, even flat ALC panels with linear scratches on their surface can be used if they do not have any structural problems. This reduces the amount of panels that are discarded, thereby reducing resource loss and the costs associated with preparing new panels.

[0032] (Second embodiment) Next, a second embodiment of the lightweight aerated concrete panel of the present invention will be described. Figure 3 is a schematic plan view showing one example of the configuration of a lightweight aerated concrete panel according to this embodiment. Figure 4 is a schematic plan view showing linear scratches on the short side of the panel. In the following description, we will mainly explain the differences from the embodiment described above, and will omit explanations of similar parts.

[0033] In this lightweight aerated concrete panel (ALC panel 2), a plurality of grooves 21 are formed on one surface of the panel body 20 at predetermined intervals, substantially parallel to the short side of the panel body 20.

[0034] The width (maximum width) of the groove 21 is preferably greater than 0 mm and less than 7 mm, more preferably greater than 0 mm and 4 mm or less, more preferably greater than 0 mm and 2 mm or less, and even more preferably 0.3 mm or more and 2 mm or less. The depth (maximum depth) of the groove 21 is preferably greater than 0 mm and less than 4 mm, greater than 0.3 mm and less than 4 mm, and more preferably 0.3 mm or more and 2 mm or less. Furthermore, the spacing between these grooves 21 is greater than 0 mm and 100 mm or less, preferably 10 mm or more and 60 mm or less, and more preferably 10 mm or more and 30 mm or less.

[0035] In particular, in the ALC panel 2 shown in Figure 3, multiple grooves 21 are formed approximately parallel to the short side of the panel body 20, which makes linear scratches 50b along the short side of the panel body 20, as shown in Figure 4, more effectively less noticeable. Furthermore, the flat design appearance is not compromised. Furthermore, the multiple grooves 21 provided in the short-side direction may have the same depth and spacing (uniform) or different spacing (random), as long as they are within the above range.

[0036] (Third embodiment) Next, a third embodiment of the lightweight aerated concrete panel of the present invention will be described. Figure 5 is a schematic plan view showing one example of the configuration of a lightweight aerated concrete panel according to this embodiment. Figure 6 is a schematic plan view showing linear scratches on the panel in the long and short side directions. In the following description, we will mainly explain the differences from the embodiment described above, and will omit explanations of similar parts.

[0037] In this lightweight aerated concrete panel (ALC panel 3), a plurality of grooves 31a are formed on one surface of the panel body 30 at predetermined intervals, substantially parallel to the long side of the panel body 30, and a plurality of grooves 31b are formed at predetermined intervals, substantially parallel to the short side of the panel body 30. That is, the plurality of grooves 31a in the direction of the long side and the plurality of grooves 31b in the direction of the short side are formed to intersect.

[0038] The width (maximum width) of grooves 31a and 31b is preferably greater than 0 mm and less than 7 mm, more preferably greater than 0 mm and 4 mm or less, more preferably greater than 0 mm and 2 mm or less, and even more preferably 0.3 mm or more and 2 mm or less. The depth (maximum depth) of grooves 31a and 31b is preferably greater than 0 mm and less than 4 mm, more preferably greater than 0.3 mm and less than 4 mm, and more preferably 0.3 mm or more and 2 mm or less. Furthermore, the spacing between these grooves 31a and 31b is greater than 0 mm and 100 mm or less, preferably 10 mm or more and 60 mm or less, and more preferably 10 mm or more and 30 mm or less.

[0039] In particular, in the ALC panel 3 shown in Figure 5, multiple grooves 31a and 31b are formed substantially parallel to the long and short sides of the panel body 30. This makes it possible to more effectively conceal linear scratches 50a along the long side of the panel body 30 and linear scratches 50b along the short side, as shown in Figure 6. Furthermore, the flat design appearance is not compromised. Furthermore, the multiple grooves 31a provided in the long side direction and the multiple grooves 31b provided in the short side direction may have the same depth and spacing, or they may be different (random), as long as they are within the above range.

[0040] (Fourth embodiment) Next, a fourth embodiment of the lightweight aerated concrete panel of the present invention will be described. Figure 7 is a schematic plan view showing one example of the configuration of a lightweight aerated concrete panel according to this embodiment. Figure 8 is a schematic plan view showing linear scratches on the panel in an oblique direction. In the following description, we will mainly explain the differences from the embodiment described above, and will omit explanations of similar parts.

[0041] In this lightweight aerated concrete panel (ALC panel 4), multiple grooves 41 are formed on one surface of the panel body 40 at predetermined intervals, substantially parallel to the long or short side of the panel body 40. Figure 7 shows the case where multiple grooves 41 are formed at predetermined intervals substantially parallel to the long side of the panel body 40. In the embodiments described above, the grooves were formed in a substantially straight line, but in the ALC panel 4 of this embodiment, the multiple grooves 41 are formed in a wavy line shape rather than a substantially straight line. Furthermore, "the groove 41 is formed approximately parallel to the long or short side of the panel body 40" means that the straight line connecting the centers of the amplitude of the wavy lines is approximately parallel to the long or short side of the panel body 10.

[0042] The width (maximum width) of the groove 41 is preferably greater than 0 mm and less than 7 mm, more preferably greater than 0 mm and 4 mm or less, more preferably greater than 0 mm and 2 mm or less, and even more preferably 0.3 mm or more and 2 mm or less. The depth (maximum depth) of the groove 41 is preferably greater than 0 mm and less than 4 mm, greater than 0.3 mm and less than 4 mm, and more preferably 0.3 mm or more and 2 mm or less. Furthermore, the spacing between these grooves 41 is greater than 0 mm and 100 mm or less, preferably 10 mm or more and 60 mm or less, and more preferably 10 mm or more and 30 mm or less.

[0043] In particular, in the ALC panel 4 shown in Figure 7, multiple wavy grooves 41 are formed approximately parallel to the long side of the panel body 40, which makes linear scratches 50c that are oblique to the long and short sides of the panel body 10, such as those shown in Figure 8, more effectively less noticeable. Furthermore, the flat design appearance is not compromised. Furthermore, the multiple wavy grooves 41 provided in the direction of the longer side may have the same depth and spacing (uniform) or different spacing (random), as long as they are within the above range.

[0044] Furthermore, although the above-described embodiment explained using the example of a case where multiple wavy grooves 41 are provided along the long side direction of the panel body 40, the invention is not limited to this, and multiple wavy grooves may be provided along the short side direction of the panel body 40, or along both the long side direction and the short side direction.

[0045] In the embodiments described above, the main focus has been on using linear grooves (approximately straight or wavy) to make linear scratches on the panel body less noticeable. However, the linear grooves in this embodiment can also make scratches other than linear scratches on the panel body less noticeable. Examples of scratches other than linear scratches include, for example, dents (hole-like scratches) with a diameter of less than 5 mm and a depth of 4 mm or less, dents with a diameter of less than 10 mm and a depth of 2 mm or less, dents with a diameter of less than 20 mm and a depth of 1 mm or less, and surface scratches (scratches that appear as a slight depression on the surface) with a diameter of 4 mm or less and a depth of 4 mm or less. With the ALC panel of this embodiment, even such point-like and surface scratches can be made less noticeable after painting.

[0046] <Structure> The structure of the present invention is formed by applying a coating to the surface of a flat, lightweight aerated concrete panel (ALC panel) as described above. In the structure of the present invention, shallow grooves as described above are densely formed on the surface of the flat ALC panel. Therefore, even if the ALC panel has linear scratches or the like, the scratches become difficult to see after the painting finish. In other words, linear scratches and the like on the panel surface can be made less noticeable without compromising the flat design.

[0047] For painting, any painting materials commonly used for painting ALC panels (including primers, intermediate coats, and topcoats) can be used without any particular limitations.

[0048] <Buildings> Furthermore, the technical concept of the present invention also extends to buildings equipped with flat-type lightweight aerated concrete panels (ALC panels) or structures as described above. In other words, in buildings equipped with flat ALC panels or structures as described above, linear scratches and other imperfections are less noticeable while maintaining a flat texture, effectively suppressing any deterioration in the building's appearance.

[0049] As described above, the flat-type lightweight aerated concrete panel or structure of the present invention can be used, for example, as an exterior wall of a building, but is not limited to that, and may also be used as an interior wall, partition wall, ceiling wall, etc. of a building.

[0050] While embodiments of the present invention have been described above, the present invention is not limited thereto and can be modified as appropriate without departing from the spirit of the invention. For example, in the embodiments described above, the case in which multiple grooves are provided on one surface of the panel body was explained as an example, but the present invention is not limited thereto, and the multiple grooves may be provided on both surfaces of the panel body.

[0051] Furthermore, in the embodiments described above, the panel body is approximately rectangular in plan view, and the example given is a case where the length of one set of sides differs from the length of the other set of sides in two opposing sets (i.e., there is a set that forms the longer side and a set that forms the shorter side). However, the present invention is not limited to this, and can also be applied to a square panel in which the lengths of all four sides are equal. In this case, the direction of the longer side shall be read as the "first direction," and the direction of the shorter side shall be read as the "second direction (perpendicular to the first direction)." Furthermore, the technical concept of this invention also applies to panels with shapes other than rectangles. [Examples]

[0052] The following describes examples and comparative examples taken to confirm the effects of the present invention, but the present invention is not limited to these examples.

[0053] (Examples) The panel body, made of lightweight aerated concrete, had multiple substantially linear grooves formed along its long side to form the panel of the embodiment. The depth of these grooves was 2 mm, and the spacing between the grooves was 10 mm. Furthermore, the spacing between the multiple grooves was uniform along the short side of the panel body.

[0054] (Comparative example) A flat, lightweight aerated concrete panel without grooves was prepared and used as the comparative example panel.

[0055] The panels in both the examples and comparative examples are roughly rectangular in shape, with a long side of 1820 mm, a short side of 606 mm, and a thickness of 37 mm.

[0056] The panel in the example was found to show almost no visible scratches even when linear scratches approximately 0.5 mm wide, 0.5 mm deep, and 0 mm to 1820 mm long were made along the long side of the panel. Next, the panel of this embodiment was painted. The thickness of the paint was approximately 1 mm. As a result, it was confirmed that even if linear scratches were made on the surface as a whole, the scratches were hardly noticeable, and the flat texture of the panel was maintained.

[0057] Figure 9 shows a photograph of the panel used in the example. Figure 10 shows a photograph of the flat panel (bottom row) after painting in the example, and a photograph of a design panel (top row) as a reference example. Figure 11 shows an actual on-site photograph of a comparative example panel with linear scratches after painting. Upon visual inspection of the painted panel surface, scratches were clearly visible on the comparative example panel, confirming the difference from the example panel.

[0058] Thus, the present invention provides a flat, lightweight aerated concrete panel that can make linear scratches and other marks on the panel surface less noticeable without compromising the flat design aesthetic. [Industrial applicability]

[0059] By using the lightweight aerated concrete panel according to the present invention, linear scratches and other imperfections on the panel surface can be made less noticeable without compromising the flat design aesthetic, making it widely usable as a flat wall panel for buildings. [Explanation of symbols]

[0060] 1,2,3,4 Lightweight Aerated Concrete Panels (ALC Panels) 10, 20, 30, 40 Panel Body 11,21,31a,31b,41 groove 50a,50b,50c Linear scratches

Claims

1. A flat-type lightweight aerated concrete panel comprising a roughly rectangular plate-shaped panel body made of lightweight aerated concrete, The panel body has a plurality of grooves provided on its surface in a substantially straight line along the long side direction or the short side direction, The width of the groove is greater than 0 mm and less than or equal to 4 mm. Furthermore, the depth of the groove is greater than 0 mm and less than 4 mm. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals.

2. A flat type of lightweight aerated concrete panel comprising a substantially rectangular plate-shaped panel body made of lightweight aerated concrete, The panel body has a plurality of grooves provided on its surface in a substantially straight line along the long side direction or the short side direction, The width of the groove is greater than 0 mm and less than 7 mm. Furthermore, the depth of the groove is 0.3 mm or more and 2 mm or less. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals.

3. A flat-type lightweight aerated concrete panel comprising a roughly rectangular plate-shaped panel body made of lightweight aerated concrete, The panel body has a plurality of grooves provided on its surface in a substantially straight line along the longer side and a plurality of grooves provided in a substantially straight line along the shorter side, The width of the groove is greater than 0 mm and less than or equal to 4 mm. Furthermore, the depth of the groove is greater than 0 mm and less than 4 mm. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals.

4. A flat type of lightweight aerated concrete panel comprising a substantially rectangular plate-shaped panel body made of lightweight aerated concrete, The panel body has a plurality of grooves provided on its surface in a substantially straight line along the longer side and a plurality of grooves provided in a substantially straight line along the shorter side, The width of the groove is greater than 0 mm and less than 7 mm. Furthermore, the depth of the groove is 0.3 mm or more and 2 mm or less. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals.

5. A flat-type lightweight aerated concrete panel comprising a roughly rectangular plate-shaped panel body made of lightweight aerated concrete, The panel body has a plurality of grooves arranged in a wavy pattern along the long side direction or the short side direction, The width of the groove is greater than 0 mm and less than or equal to 4 mm. Furthermore, the depth of the groove is greater than 0 mm and less than 4 mm. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals.

6. A flat type of lightweight aerated concrete panel comprising a substantially rectangular plate-shaped panel body made of lightweight aerated concrete, The panel body has a plurality of grooves arranged in a wavy pattern along the long side direction or the short side direction, The width of the groove is greater than 0 mm and less than 7 mm. Furthermore, the depth of the groove is 0.3 mm or more and 2 mm or less. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals.

7. A flat lightweight aerated concrete panel comprising a rectangular panel body made of lightweight aerated concrete, with sides in a first direction and a second direction perpendicular to the first direction, The surface of the panel body has a plurality of grooves arranged in a substantially straight or wavy shape along the first direction, The width of the groove is greater than 0 mm and less than or equal to 4 mm. Furthermore, the depth of the groove is greater than 0 mm and less than 4 mm. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals.

8. A flat lightweight aerated concrete panel comprising a rectangular panel body made of lightweight aerated concrete, with sides in a first direction and a second direction perpendicular to the first direction, The surface of the panel body has a plurality of grooves arranged in a substantially straight or wavy shape along the first direction, The width of the groove is greater than 0 mm and less than 7 mm. Furthermore, the depth of the groove is 0.3 mm or more and 2 mm or less. A flat, lightweight aerated concrete panel characterized in that the grooves are provided at predetermined intervals.

9. A flat-type lightweight aerated concrete panel according to any one of claims 2, 4, 6, or 8, wherein the width of the groove is greater than 0 mm and 4 mm or less.

10. A flat-type lightweight aerated concrete panel according to any one of claims 1 to 9, wherein the width of the groove is greater than 0 mm and less than or equal to 2 mm.

11. A flat-type lightweight aerated concrete panel according to any one of claims 1 to 10, wherein the width of the groove is 0.3 mm or more and 2 mm or less.

12. A flat-type lightweight aerated concrete panel according to any one of claims 1, 3, 5, or 7, wherein the depth of the groove is 0.3 mm or more and less than 4 mm.

13. A flat-type lightweight aerated concrete panel according to any one of claims 1, 3, 5, or 7, wherein the depth of the groove is 0.3 mm or more and 2 mm or less.

14. A flat-type lightweight aerated concrete panel according to any one of claims 1 to 13, wherein the spacing between the grooves is greater than 0 mm and 100 mm or less.

15. A flat-type lightweight aerated concrete panel according to any one of claims 1 to 14, wherein the spacing between the grooves is 10 mm or more and 60 mm or less.

16. A flat-type lightweight aerated concrete panel according to any one of claims 1 to 15, wherein the spacing between the grooves is 10 mm or more and 30 mm or less.

17. A lightweight aerated concrete panel structure comprising a flat lightweight aerated concrete panel according to any one of claims 1 to 16, wherein the surface of the aerated concrete panel is coated.

18. A building comprising the lightweight aerated concrete panel structure described in claim 17.

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