JP3968666B2 - Tile joint material for prefabrication method - Google Patents

Description

  The present invention relates to a tile joint material for a front-end construction method used when manufacturing a tile-embedded concrete panel used for a wall surface such as an outer wall of a concrete building.

  In recent years, a method of manufacturing a concrete panel in which tiles are embedded in advance and fixing the panel to a wall surface or the like has been adopted in order to attach a tile to a wall surface or the like of a concrete building. This is generally referred to as a tile front-end construction method.

  In this construction method, a tile-shaped joint material that is designed to arrange tiles on a pressure-sensitive adhesive sheet serving as a base material and punched out a portion corresponding to the tile embedding, or a rod-shaped joint material that matches the joint width is used as the base material. Affixed to the adhesive sheet, and stuck to the punched part or tile insertion part so that the surface of the tile faces the base material. After forming a tile sheet in which tiles are arranged in a predetermined manner, the tile sheet is turned upside down. After laying on the bottom of the formwork, cast uncured concrete to a predetermined thickness, remove the base material and joint material from the formwork after the concrete is hardened, and the concrete panel with tiles embedded in a predetermined arrangement Is to be completed.

  Closed cell foam is used as the joint material used in this tip construction method from the viewpoint of strength, ease of handling, cost, etc., according to the tile size, arrangement method, joint width, overall construction cost, etc. Punched using a Thomson blade or by using a Thomson blade according to the joint width, or punched or connected to the portion corresponding to the tile embedded part by adjusting the expansion ratio and thickness of the foam It has been manufactured and used each time as a cut rod-like joint material.

  There are several types of materials used as jointing materials, mainly types that are extruded and have smooth surfaces on both front and back sides, and a foamed block body that is processed into a flat plate that is rough on both sides There is a type that is a surface, or a type in which a cement setting inhibitor is preliminarily applied to the surface portion of the joint material (see Patent Document 1).

      JP-A-6-220977

  However, the type that has been extruded and has smooth surfaces on both the front and back sides has a certain degree of elasticity, so it is easy to stick to the adhesive sheet when forming a tile sheet. There is also a merit that it is easy to attach tiles because it is easy to put out dimensional accuracy because it is small and stretchable, but it is difficult to peel off from the concrete panel due to the ease of pasting when peeling the base material from the finished concrete panel There were problems such as the waste of the joint material sticking to the surface and joints, and spending more time and costs than necessary in the process of performing a high water pressure cleaning process, and the joint part becomes rough due to the process. In addition, since the concrete surface of the joint portion is smooth and glossy due to the smooth surface of the joint material, there is a problem that the color unevenness of the concrete surface becomes conspicuous.

  In addition, in the type where the foamed block body is rolled and processed into a flat plate and both front and back surfaces are rough, it is relatively easy to peel off from the finished concrete panel, and the concrete surface of the joint is also roughened. Therefore, there is a merit that the color unevenness of the concrete surface is not conspicuous, but since it is laid, it is easy to cause an error in the thickness, and the adhesive sheet such as tape is inherently difficult to paste, so when forming a tile sheet However, joint materials tend to fall off easily. In addition, since the material is soft and easily stretchable, it is difficult to obtain dimensional accuracy such as joint width, and it is difficult to mount tiles when forming a tile sheet, and there is a problem such that concrete leaks easily occur.

  Among the various problems as described above, the type proposed in Patent Document 1 has appeared, but in this type, not only the extra process of applying a cement anti-caking agent to the material that becomes the joint material increases, Since the material is used as a grid shape with punched portions corresponding to the tile embedding part and a rod shape matching the joint width, the shape stability of the joint material is poor, and it is difficult to impregnate or apply cement anti-caking agent with good workability. is there. In addition, since this type tries to solve only the point of view that it is easy to peel off from the concrete panel, problems such as dimensional accuracy due to stretchability associated with the characteristics of existing materials and dropout of joint material when forming a tile sheet. Is considered unresolved.

  In view of the background of such a conventional technique, the present invention relates to a tile joint material for a front-end construction method that is currently used, which is low cost, has little labor, and has a good workability, that is, extra material is used at the time of manufacturing the material. Providing a very convenient joint material that does not increase the number of processes, is easy to achieve dimensional accuracy, is easy to stick to the adhesive sheet as the base material, is easy to peel off from the concrete panel together with the base material, and there is no risk of leakage. There is to do.

  As a result of intensive studies to solve such problems, the present invention provides a tile joint material for a front-end construction method used when manufacturing a tile-embedded concrete panel used for a wall surface such as an outer wall of a concrete building, The joint material is an extruded closed cell foam, wherein the closed cell foam has a surface treated to be a smooth surface, and the back surface is treated to be a rough surface. The tile joint material for the construction method was considered, and the treatment method was an electron beam irradiation treatment.

  As a method of use, the smooth surface is used in the direction of the pressure-sensitive adhesive sheet serving as a base material. This smooth surface makes it easy to attach an adhesive product, and can solve problems such as dropout of joint material when forming a tile sheet existing in a type having a rough surface.

  One rough surface is used for the surface to be applied to concrete. This is because the surface of the type which is roughened and flattened with a rough surface is reproduced in a pseudo manner. As a result, there was a conventional type that had smooth surfaces on both sides, and it was possible to solve problems such as waste of joint material sticking to the tile surface and tile joints when peeling the base material from the finished concrete panel. It is possible to omit the high water pressure cleaning process. In addition, since the concrete surface of the joint is finished to be rough, uneven color on the concrete surface can be made inconspicuous.

  As the material for the joint material of the present invention, it is preferable to use a closed cell foam extruded from the viewpoint of easy handling such as dimensional accuracy, cost, flexibility and lightness, and the surface is smooth in the manufacturing process. It is preferable that an electron beam irradiation treatment is performed to provide a surface, and an electron beam irradiation treatment is not performed to finish the back surface to a rough surface. The molding method is preferable because the thickness can be accurately obtained by extrusion molding. In addition, the use of a material with low elasticity and a certain degree of elasticity can provide accurate dimensional accuracy, and when forming a tile sheet, it tends to be easy to mount the tile, and the workability can be improved. This is preferable because it becomes possible.

  The thickness of the joint material of the present invention is preferably at least half of the thickness of the tile, and the thickness of the foam is preferably in the range of 1 mm to 15 mm. However, depending on the purpose of use, it is considered that there is no problem with a thickness outside this range. .

  The expansion ratio of the joint material used in the present invention is preferably 1.5 to 30 times. When the expansion ratio is less than 1.5 times, flexibility and lightness are reduced, and it becomes difficult to handle when forming a tile sheet, and it is difficult to attach to an adhesive sheet as a base material. On the contrary, if the expansion ratio exceeds 30 times, it tends to be difficult to peel off from the concrete panel.

  According to the present invention, it is easy to handle because it is flexible and lightweight by using a closed cell foam, and it is possible to accurately obtain the thickness by using an extruded product. In addition, since the electron beam irradiation treatment usually applied to both the front and back surfaces can be manufactured in one process on one side, it can be manufactured at a low cost without increasing the number of extra processes. Since the width can be easily processed with good dimensional accuracy, it is possible to easily attach joint materials and tiles without gaps when forming a tile sheet. In addition, since it can be easily peeled off together with the base material when peeling from the concrete panel, it is possible to omit the conventional high water pressure washing treatment process, which can greatly improve both economy and workability. It became possible.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to this.

  First, when manufacturing the material, a roll-like closed cell foam extruded to a thickness of 3 mm was manufactured by the same manufacturing method as before. At this time, only the front surface was subjected to electron beam irradiation treatment, and the back surface was not subjected to electron beam irradiation treatment. By this step, a material having a smooth surface on the front surface and a rough surface on the back surface was completed.

  Then, the material produced as described in the previous section is roughly cut by an automatic auto cutter machine into a flat plate shape, punched out using a Thomson blade, and processed into a grid joint material as shown in FIG. did. The joint material at this time had an overall dimension of 300 mm in length and 600 mm in width and a joint width of 5.2 mm for both the vertical joint and the horizontal joint, and the size of the tile insertion portion was 44.8 mm for both the vertical and horizontal dimensions. The dimensional accuracy can be obtained more accurately than the joint material processed in the same way with the type that foamed block body.

  First, such a joint material is attached to the adhesive sheet 4 as a base material with the smooth surface 1 facing, and then a tile 5 having a thickness of 6 mm and a length and width of 44.8 mm is attached to the tile insertion portion to form a tile sheet. did. At this time, the joint material was firmly attached to the pressure-sensitive adhesive sheet 4 with the smooth surface 1 and the dimensional accuracy was exactly as shown in the previous section, so that the tile 5 could be attached quickly and reliably.

  After turning the tile sheet upside down and laying it on the bottom of a formwork made of wood, as shown in FIG. 2, the reinforcing bars 8 are inserted and the uncured concrete 6 is cast to a predetermined thickness and the concrete 6 is cured. The base material 4 and the joint material 3 were peeled off from the mold, and a concrete panel in which tiles arranged in a predetermined manner were embedded as shown in FIG. 3 was completed. The concrete panel completed at this time is free of leaks of concrete on the tile surface and surroundings, and the concrete surface 7 of the joint part is finished as a rough surface as shown in FIG. Finished. In addition, since the joint material 3 is securely attached to the adhesive sheet 4 as the base material, it can be easily peeled off together with the base material 4, and the waste of the joint material sticks to the tile surface or tile joint part. The subsequent high water pressure washing treatment process could be omitted without causing any problems. In addition, as a result of performing the same process as described above on a rod-shaped joint material having a joint width such as 3-2 in FIG. 1, the same result as that of the lattice-shaped joint material could be obtained.

Comparative Example 1

  Hereinafter, the same steps as those of the examples were performed on the conventional materials as comparative examples.

  First, a material of a type in which a smooth surface was provided by subjecting both front and back surfaces to electron beam irradiation treatment using an independent foam extruded to a thickness of 3 mm. The material was processed into a grid-like joint material in the same manner as in the Example, and then attached to an adhesive sheet as a substrate together with the tile to form a tile sheet. At that time, since the dimensional accuracy was high and the joint material had a certain degree of elasticity, it was easy to mount the tiles, and the smooth surface could surely be attached to the adhesive sheet as the base material.

  Then, after laying the tile sheet upside down and laying it on the bottom of the mold made of wood, cast the uncured concrete to a predetermined thickness and after the concrete hardens, remove it from the mold and remove the base material and the joint material Although it peeled, the waste of joint material stuck on the tile surface and joint part, and it was subject to high water pressure cleaning, resulting in a significant amount of time. Moreover, since the joint portion was finished with a smooth surface by the joint material, the color unevenness of the concrete surface of the joint portion was easily noticeable.

Comparative Example 2

  Further, the same process as in the example was carried out even in the type in which the other foamed block body was rolled and processed into a flat plate and the surface was rough. First, a closed-cell foamed body of a block was produced, and was processed into a flat plate shape by rolling it to a thickness of 3 mm, and then processed into a grid joint material using a Thomson blade in the same manner as in the example. At this time, the dimensional accuracy tends to be difficult to obtain due to the soft nature of the members in both the punching process and the punching process, and an error may occur in the thickness and joint width. After that, a tile sheet was formed, but the adhesive material such as tape was difficult to stick at that time, so the joint material was easy to drop off, and it was soft and highly stretchable, so it was difficult to handle and tiles were difficult to install. It was.

  Then, after laying the tile sheet upside down on the bottom of the formwork made of wood in the same manner as in the example, after placing the uncured concrete to a predetermined thickness and hardening the concrete, the base material is removed from the formwork. When the joint material is peeled off, the joint surface can be peeled off relatively easily, and the concrete surface of the joint portion is rough and the color unevenness is inconspicuous, but since the dimensional accuracy is not accurate, the tile and joint material There is a part where there is a slight gap in between, which results in many leaks of concrete, and the hardened concrete made by it is scraped off with a sharp blade or subjected to high water pressure washing processing, and it takes a lot of time Result.

  Moreover, it processed into the rod-shaped joint material which match | combined with the joint width with the conventional material, and each process was implemented similarly to the Example, However, The result similar to a grid-shaped joint material was obtained, respectively.

It is a perspective view of the grid-like or rod-like joint material of the present invention.

It is the schematic of the cross section at the time of placing non-hardened concrete after forming a tile sheet using this invention joint material.

It is the schematic of the cross section in the time of completing a concrete panel using this invention joint material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joint material smooth surface part 2 Joint material rough surface part 3 Joint material 3-1 Grid joint material 3-2 Rod joint material 4 Adhesive sheet 5 Tile 6 Concrete 7 Concrete joint part 8 Reinforcing bar

Claims (1)

  In a tile joint material for a front-end construction method used when manufacturing a tile-embedded concrete panel to be used for the outer wall of a concrete building, etc., the closed cell with an expansion ratio of 1.5 to 30 times obtained by extruding the joint material. It is a foam, and the adhesive sheet side adhesive surface as a base material is subjected to electron beam irradiation treatment to make it a smooth surface, and the concrete side adhesive surface is left rough without being subjected to electron beam irradiation treatment. Tile joint material for the front-end construction method.

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