JP2012001403A - Method for producing terrazzo - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing terrazzo made proof against aggregate peeling.SOLUTION: Crushed shell pieces 12 are bonded to a wire gauze 20 with a flexible adhesive 14 to make a crushed shell piece assemblage 22. The crushed shell piece assemblage 12 can be used in the production of precast terrazzo or terrazzo poured in place. The crushed shell piece assemblage 12 is embedded in a cement paste, and after the cement paste is hardened, the hardened cement is ground to expose crushed shell pieces to the surface. Because the crushed shell pieces are bonded to each other with the adhesive, the thin crushed shell pieces exposed to the surface are made proof against peeling.

Description

  The present invention relates to a method for manufacturing a terrazzo, and more particularly to a method for manufacturing a terrazzo that can prevent peeling of an aggregate.

  Terrazzo is a type of artificial stone made by mixing and hardening aggregates made of crushed stone such as marble and granite with cement paste, which is a cement paste, polishing the surface and sharpening the aggregate. Because of its beautiful surface, it is widely used for building walls and floors.

  There are two types of terrazzo: a terrazzo that is plastered and sharpened by a plasterer at the construction site, and a factory terrazzo (so-called terrazo tile) that is manufactured at the factory.

  In-situ terrazzo is manufactured by grinding and mixing a mixture of crushed stone and cement paste into a construction site such as a floor or a wall, then polishing the surface and sharpening the aggregate.

  In the case of a factory terrazzo, a mixture of crushed stone and cement paste is put into a mold and cured, then taken out of the mold, polished on the back surface, and crushed stone is sharpened to produce.

  The present inventor has devised various means to further enhance the decorativeness by using fragments of shells, glass, plastics or the like as aggregates instead of crushed stones as such terrazzo aggregates.

  The present inventor uses on-site terrazzo and factory terrazzo using a mixture of cement paste and shells, glass, or plastic fragments (hereinafter simply referred to as terrazzo if it is not necessary to distinguish). As a result of trying to manufacture, I noticed the following problems.

  After polishing, the terrazzo is sharpened with shells, glass, or plastic fragments on the surface to form a beautiful pattern, but the thin fragments that are sharpened on the surface are easy to peel off.

  FIG. 1 shows a state where thin debris exposed on the surface sharpened on the surface is peeled off. FIG. 1A shows a state in which the crushed pieces 12 embedded in the hardened cement paste 10 are polished. As shown in FIG.1 (b), the thin debris 13 sharpened on the surface peels.

  In particular, when the floor is made of terrazzo, force is applied to the fragments with shoes or the like, resulting in particularly severe peeling and loss of commercial value. This means that the adhesion strength between the cement paste and shells, glass or plastic fragments is weak.

  On the other hand, Patent Document 1 discloses a method for manufacturing a terrazzo floor having a design element as a conventional technology of terrazzo. Further, Patent Document 2 discloses a terrazzo tile that is difficult to slip even on rainy days.

  However, these conventional techniques do not solve the problem of peeling of the aggregate from the finished terrazzo.

Special table 2003-502533 gazette JP 2005-139822 A

  The objective of this invention is providing the manufacturing method of the terrazzo which can prevent peeling of an aggregate.

  As a result of repeated ingenuity, the present inventor forms an aggregate aggregate by previously bonding pieces (aggregates) of shells, glass, plastic, etc. with an adhesive, and this aggregate aggregate is used as a binder. I devised to embed and polish to produce terrazzo.

  Since the pieces are bonded to each other with an adhesive, the thin pieces exposed on the surface sharpened by polishing are bonded to the adjacent pieces. Therefore, it does not peel off.

  As the adhesive, a flexible adhesive is used when the aggregate aggregate is to be flexible.

  It is preferable that the aggregate aggregate has a structure in which debris is accumulated on the support member. As the support member, a net-like member or a sheet-like member is used.

  Aggregates are accumulated in a plate shape or a lump shape on such a support member. Here, the accumulation in a plate shape means accumulation in a flat state, and the accumulation in a lump shape means that a plurality of pieces of fragments are dispersed and accumulated.

  When the adhesive is a flexible adhesive, the plate-like aggregate aggregate itself has flexibility, so that it can be applied to a curved surface, for example, in the case of on-site terrazzo. . In the case of a factory terrazzo, a curved terrazzo tile can be easily manufactured.

  In the case of an aggregate of aggregates accumulated in a lump on the support member, the adhesive for bonding the aggregate to the mass may not be a flexible adhesive. Since there is no adhesion between the aggregates, the support member can be bent without the aggregates being detached from the support member. Similarly to the above, in the case of field terrazzo, it can be applied to a curved surface. In the case of a factory terrazzo, a curved terrazzo tile can be easily manufactured.

  According to the terrazzo manufacturing method of the present invention, the aggregates are bonded to each other with an adhesive in advance, so that the flakes that are sharpened and appear on the surface are bonded to the adjacent aggregates. So it will not peel off. Therefore, cement paste and aggregates with weak adhesive strength can be used.

  The aggregate aggregate in which the support member and the aggregate are integrated is easy to handle. In particular, in the case of field terrazzo, the aggregate aggregate is applied to a wall or a column, so that the operation is simplified. Further, even when the construction site is complicated such that it has a curved surface, it can be manufactured by curving a flexible aggregate aggregate and attaching it to the construction site. Therefore, even a skilled craftsman can easily construct a wall or a complicated object, which is difficult for an unskilled person.

  Conventionally, in the case of on-site terrazzo, when cement paste mixed with aggregate is applied to the construction site, if it is not applied all at once, the joint with the dry part will weaken, cracks etc. will enter from there The material peels. In order to prevent this, the construction area is divided by joints (brass, stainless steel, wood, etc.), and the divided area is painted all at once. However, according to the present invention, since the aggregate does not peel, it is not necessary to provide such joints.

It is a figure which shows the mode of peeling of a fragment. It is sectional drawing of a shell fragment piece aggregate. It is sectional drawing which shows manufacture of a terrazo tile. It is sectional drawing of the terrazzo tile before grinding | polishing. It is a figure which shows a mode that the thin debris sharpened on the surface has adhere | attached on the adjacent debris. It is sectional drawing which shows the shell fragment aggregate formed on the wire mesh. It is a top view which shows the spiral shaped shell fragment aggregate formed on the wire mesh. It is sectional drawing which shows manufacture of a terrazo tile. It is a top view of a terrazo tile. It is a figure which shows the process of creating the shell fragment aggregate formed on the wire mesh. It is a figure which shows the process of attaching a shell fragment aggregate to a round pillar. It is a figure which shows the process of overcoating a cement paste. It is a figure which shows a mode that the shell fragment was raised after grinding | polishing. It is a figure which shows the process of attaching the shell fragment aggregate formed on the wire mesh to a round pillar. It is a figure which shows the shell-shell fragment lump disperse | distributed and arranged on the wire mesh. It is a figure which shows a mode that the lump of the shell fragment was mixed with the cement paste. It is sectional drawing which shows the shell debris accumulation body formed on the PBV sheet. It is a figure which shows the process of attaching the shell fragment aggregate formed on the PBV sheet to a round pillar.

  The aggregate may be of any kind as long as it has a weak adhesive strength with the cement paste. For example, shells, glass, or plastic.

  The adhesive for adhering the aggregate may be of any kind as long as it can adhere the aggregate. Any of inorganic adhesives, organic adhesives, and synthetic adhesives can be used. If the aggregate aggregate is required to be flexible, a flexible adhesive is used. Examples of the flexible adhesive include butyral adhesives, silicone adhesives, and rubber adhesives. As the butyral adhesive, a polyvinyl butyral resin adhesive is suitable.

  The net-like member used as the support member may be of any type such as a metal wire such as stainless steel, metal fiber, carbon fiber, or glass fiber fiber.

  In each of the following examples, a crushed shell is typically used as the aggregate. The most suitable shell is pearl oyster or abalone shell. As the flexible adhesive, a polyvinyl butyral resin adhesive is typically used.

  As the support member, a wire mesh or a polyvinyl butyral resin sheet is typically used. The polyvinyl butyral resin sheet is used as an intermediate film of laminated glass for automobiles. Therefore, the sheet | seat collect | recovered from the discarded laminated glass can be utilized.

  First, an example of a method for manufacturing a factory terrazzo (terrazzo tile) and then a field terrazzo will be described.

Terrazo tile manufacturing method (when no support member is used)
First, a shell, such as an oyster shell, is crushed to a size of about 3 to 7 mm to prepare a shell fragment.

  The shell fragments are washed with a weak alkaline washing solution in order to improve the familiarity with the adhesive.

  A polyvinyl butyral resin is dissolved in a solvent such as methanol (for example, a resin: solvent volume ratio of 1: 4) to produce a flexible adhesive.

  As shown in FIG. 2, the pearl oyster fragments 12 are dipped in a flexible adhesive 14 contained in a container and adhered to each other with a flexible adhesive to form a plate-like shell crumb having a thickness of about 10 mm. The integrated body 16 is produced. It should be noted that the shell fragment aggregate can also be made in a mold described later.

  On the other hand, a cement paste 10 prepared by mixing white cement and colored powder with water is prepared.

  As shown in FIG. 3, the produced shell fragment aggregate 16 is placed in a box-shaped mold 18. Subsequently, the cement paste 10 is injected into the mold 18. At this time, the shell fragment aggregate 16 is in a state of sinking to the bottom of the cement paste 10. The injection amount of the cement paste is set so that the whole shell fragment aggregate is immersed.

  At this time, vibration is applied to the mold 18 with a vibrator or the like so that the cement paste enters the gaps between the shell fragment aggregates 16. Alternatively, vibration may be directly applied to the shell fragment aggregate 16 with a vibrator or the like. Alternatively, after applying vibration with a vibrator or the like, vibration may be directly applied to the shell fragment aggregate 16 with a vibrator or the like.

  After confirming that the cement paste 10 has entered the gap between the shell fragment aggregates 16, the cement paste 10 is left to stand and when the cement paste is completely cured, the tile is taken out of the mold. As shown in FIG. 4, the tile is turned upside down, the upper surface (the side with the shell fragment aggregate) is polished, the shell fragment 14 is sharpened, and the shell fragment appears on the surface, producing a terrazzo tile with a beautiful pattern. Is done.

  Even if the cement paste is not completely cured, the polishing may be started when the cement paste is cured to a high level where it can be polished.

  Hereinafter, the term “curing” is used to mean both complete curing and curing to a high degree capable of being polished.

  As shown in FIG. 5, in the terrazzo tile manufactured in this way, the thin shell fragments 13 sharpened on the surface of the tile are adhered to the adjacent shell fragments, and thus do not peel off.

Terrazo tile manufacturing method (when using a wire mesh as a support member)
As shown in FIG. 6, the shell fragment 12 described in the first embodiment is laminated on a flexible wire mesh 20, and a container containing the flexible adhesive 14 described in the first embodiment (not shown). When the adhesive is sufficiently adhered, it is pulled up from the container, shaped and dried to produce a shell fragment aggregate 22 in which the shell fragments 12 and the shell fragments 12 and the wire mesh 20 are bonded.

  At this time, when considering the pattern when sharpened, the pattern is predicted, and the shell fragments 12 are laminated on the wire mesh 20. In this embodiment, as shown in FIG. 7, the shell fragments 12 are stacked and arranged in a spiral shape.

  As shown in FIG. 8, the shell fragment aggregate 22 thus produced is placed in a box-shaped mold 18 with the wire mesh facing upward. Subsequently, the cement paste 10 is injected into the mold 18.

  At this time, as in the first embodiment, in order to allow the cement paste 10 to enter the gap between the shell fragment aggregates 22, vibration is applied to the mold 18 with a vibrator (not shown) or the like. Alternatively, vibration may be directly applied to the shell fragment aggregate 22 with a vibrator or the like. Alternatively, after vibration is applied to the mold 18 with a vibrator or the like, vibration may be further applied directly to the shell fragment aggregate 22 with a vibrator or the like.

  After the cement paste 10 is hardened, the cement paste 10 is taken out from the mold 18, the surface with the shell fragments is polished, the shell fragments 12 are sharpened, and the terrazzo tile 24 is manufactured. FIG. 9 shows a pattern formed by shell fragments 12 that have been sharpened and raised on the surface of the tile.

  In the present embodiment, the case where a wire net is used has been described, but other fiber nets and polyvinyl butyral resin sheets may be used.

  In addition, although Example 1 and 2 demonstrated the case where flat terrazzo tile was manufactured, since the shell-shell fragment integrated body is flexible, manufacture of the curved terrazzo tile is also possible.

  A normal adhesive may be used instead of the flexible adhesive. In this case, since the shell fragment aggregate is not flexible, only flat terrazzo tiles are produced.

On-site terrazzo manufacturing method (when using a flexible wire mesh as a support member)
An example of manufacturing terrazzo on the outer peripheral surface of a round pillar will be described with reference to FIG.

  As shown in FIG. 10, shells 12 such as pearl oysters are crushed to a size of about 3 to 7 mm and washed with a weak alkaline cleaning solution.

  On the other hand, the polyvinyl butyral resin is dissolved in a solvent such as methanol (for example, 1: 4 by volume ratio of resin: solvent) to make the flexible adhesive 14.

  As described in the second embodiment, the shell fragments 12 are laminated on the flexible wire mesh 20 to a thickness of about 10 mm, and the shell fragments, the shell fragments and the wire mesh are bonded to the flexible adhesive 14. To produce a shell shell aggregate 26. Since the wire mesh 20 and the flexible adhesive 14 are flexible, the shell fragment aggregate 26 is easily bent.

  Next, water is mixed into the white cement and colored powder to prepare the cement paste 10, and as shown in FIG. 10, the shell fragment aggregate 26 is immersed in the container 28 containing the cement paste 10, and the container 28 is placed in the container 28. The cement paste 10 enters the gaps between the shell fragment aggregates 26 by applying vibration by a vibrator or the like. Alternatively, vibration may be applied directly to the shell fragment aggregate 26 with a vibrator or the like. Alternatively, after the container 28 is vibrated with a vibrator or the like, the shell fragment pieces 26 may be directly vibrated with the vibrator or the like.

  At the same time, white paste and colored powder are mixed with water to prepare a cement paste 30. As shown in FIG. 11, this cement paste is undercoated on the surface of the round pillar 32.

  The shell piece aggregate 26 in which the cement paste 10 has entered the gap between the shell pieces 12 is bent so that the wire mesh 20 is in contact with the underlying cement paste 30 while the cement paste is not cured, and the primer 32 is undercoated. The ends of the shell fragment aggregate 26 are fixed with, for example, pins (not shown) and attached.

  In addition, when the construction area of the round pillar 32 is large, it attaches, fixing to the undercoated round pillar with a pin etc., curving a some shell fragment | piece aggregate.

  Next, as shown in FIG. 12, the surface is coated with a cement paste 34 to such an extent that the shell fragment aggregates 26 are embedded.

  After the top-coated cement paste 34 is completely hardened, the outer surface of the cement paste is polished and the shell fragments are sharpened.

  Polishing is performed by using a polisher provided with a diamond pad in which diamond abrasive grains are hardened with a resin, and sequentially changing the pad from a coarser one to a smaller one. In some cases, a sander or a grindstone can also be used.

  Even if the cement paste 34 is not completely cured, the polishing may be started when the cement paste 34 is cured to a high level capable of being polished. When it is necessary to intentionally delay the curing, a curing retarder may be mixed into the cement paste 34 and cured to delay the curing.

  As a result of the polishing, as shown in FIG. 13, shell fragments 12 appear on the surface, and a beautiful pattern is formed.

On-site terrazzo manufacturing method (when using a flexible wire mesh as a support member)
In the third embodiment, in order to fill the gap between the shell debris aggregates 26 with the cement paste 10, the shell debris aggregates 26 are immersed in a container 28 containing the cement paste 10, and a vibrator or the like is placed in the container 28. The vibration was applied. Alternatively, vibration may be applied directly to the shell fragment aggregate 26 with a vibrator or the like. Alternatively, after the container 28 is vibrated with a vibrator or the like, the shell fragment pieces 26 may be directly vibrated with the vibrator or the like.
In this embodiment, without performing this step, as shown in FIG. 14, one end of the shell fragment aggregated body 26 is pinned with a pin or the like (not shown) to the round pillar 32 coated with the base cement paste 30. Secure and wrap. By using a rubber hammer, a vibrator, or the like (in the figure, an example using the rubber hammer 36) so that the underlying cement paste 30 enters the gap between the shell fragment aggregates 26 through the wire mesh 20, the vibration of the shell fragment aggregates 26 is shown. Add to. When the cement paste 30 enters the gap between the shell fragments and comes out on the surface of the shell fragment aggregate, the shell fragment aggregate 26 is fastened to the circular column 32, and the other end of the shell fragment aggregate 26 is attached to the other end. It fixes to the round pillar 32 with a pin etc. (not shown).

  Subsequent steps are the same as those in Example 3.

On-site terrazzo manufacturing method (when using a flexible wire mesh as a support member)
Examples 3 and 4 are cases in which plate-like shell fragments are used. In this embodiment, a case where a massive shell fragment aggregate is used will be described.

  FIG. 15A shows a state in which massive shell fragments 40 (hereinafter referred to as shell fragment fragments) are distributed on a flexible wire mesh 20. The shell fragment lump 40 is obtained by bonding shell fragments with an adhesive. In this case, the adhesive need not be a flexible adhesive.

  Since the space between the shell fragments 40 is vacant, the wire mesh 20 can be curved as shown in FIG.

  Similar to Examples 3 and 4, the shell fragment aggregate of this example can be used when terrazzo is manufactured and constructed in a place with a curved surface.

  It is clear that this method can also be applied to the production of factory terrazzo. In this case, a curved terrazzo tile can be manufactured.

On-site terrazzo manufacturing method (using shell fragments)
In Example 5, the shell fragment lump was dispersed and arranged on the wire mesh, but in this example, the shell fragment lump 40 was mixed with the cement paste 42 as shown in FIG. 16 without using the wire mesh. This is applied to the construction site and cured and polished.

  It is clear that this method can also be applied to the production of factory terrazzo.

On-site terrazzo manufacturing method (when using flexible adhesive sheet)
The preparation of shell fragments and flexible adhesive is the same as in Example 3.

  A flexible adhesive sheet such as a polyvinyl butyral resin sheet is prepared. As shown in FIG. 17, the shell fragments 12 are accumulated, and the shell fragments 12 and the shell fragments 12 and the sheet 44 are bonded together with a flexible adhesive 14 to produce a shell fragment aggregate 46.

  Next, as shown in FIG. 18, the sheet 44 is bonded to the surface of the round pillar 32 by using the flexibility and adhesiveness of the sheet 44. At this time, when the shell fragment aggregate 46 is heated to 500 to 600 ° C. with hot air, the surface of the sheet 44 is melted, so that the adhesive strength of the sheet is increased and the sticking to the surface of the round pillar 32 is facilitated. Further, the adhesive force of the sheet is increased even when the round pillar itself is heated with warm air and pasted.

  Next, a cement paste is overcoated on the shell fragment aggregate 46. At this time, in order to fill the cement paste in the gaps between the shell fragment aggregates 46, it is necessary to devise such as applying the cement paste with a brush. In the case of using a brush, if the brush is applied while applying mechanical vibration, the cement paste is further filled in the gaps between the shell fragment aggregates 46.

  The subsequent steps are the same as when using a wire mesh.

  Also in the present embodiment, a terrazzo with a beautiful pattern formed can be manufactured on a cylindrical surface.

  In this example, a polyvinyl butyral resin sheet having flexibility and adhesiveness was used. However, in the case of using a sheet having flexibility but not adhesiveness, the sheet is pressure-bonded to the surface of the round pillar. In this case, an adhesive may be applied to the back surface of the sheet.

10, 30, 34, 42 Cement paste 12 Shell fragment 14 Flexible adhesive 16, 22, 26, 46 Shell fragment assembly 18 Mold 20 Wire mesh 24 Terrazotile 28 Container 32 Round column 36 Rubber hammer 40 Shell fragment lump 44 Polyvinyl butyral Resin sheet

Claims (11)

Preparing an aggregate aggregate including aggregates bonded together with an adhesive;
Embedding the aggregate aggregate in a cement paste;
Curing the cement paste;
Polishing the surface of the hardened cement paste and sharpening the aggregate aggregate;
A method for producing terrazzo comprising:   The method of manufacturing a terrazzo according to claim 1, wherein the step of preparing the aggregate aggregate includes a step of collecting aggregates and bonding them together with an adhesive to form an integrated plate.   The method of manufacturing a terrazzo according to claim 1, wherein the step of preparing the aggregate aggregate includes a step of creating a plurality of aggregates in which aggregates are bonded to each other with an adhesive.   The method of manufacturing a terrazzo according to claim 2 or 3, wherein the aggregate aggregate is bonded onto a support member.   The terrazzo manufacturing method according to claim 4, wherein the support member is a net-like member or a sheet-like member.   The terrazzo manufacturing method according to claim 5, wherein the mesh member is a wire mesh, and the sheet-like member is a polyvinyl butyral resin sheet.   The terrazzo manufacturing method according to claim 1, wherein the adhesive is a flexible adhesive.   The method for producing terrazzo according to claim 7, wherein the flexible adhesive is obtained by dissolving polyvinyl butyral resin in a solvent.   The method for producing a terrazzo according to claim 8, wherein the step of embedding the aggregate aggregate in the cement paste is performed at a place where the terrazzo is applied.   The method for manufacturing a terrazzo according to claim 8, wherein the step of embedding the aggregate aggregate in a cement paste is performed in a mold.   The method for producing terrazzo according to claim 1, wherein the aggregate is a shell, glass, or plastic.

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