JP5729054B2 - Method for producing cement-based composition - Google Patents

Description

  The present invention relates to a method for producing a cementitious composition along a predetermined direction by placing a cementitious fluid while moving a placement part for placing a cementitious fluid such as concrete in a predetermined direction. About.

  Conventionally, an automatic concrete placing apparatus has been used as a suitable apparatus for manufacturing a long precast concrete member (hereinafter also referred to as a PC member) in a factory or the like. This casting apparatus has a molding table extending along the horizontal direction, and a concrete placing section provided so as to be movable above the molding table along the extending direction of the molding table. And while the concrete placement part continuously places concrete on the upper surface of the molding table, the placement part moves to the downstream side in the extending direction, so that the upper surface of the molding table is extended. A long PC member along the direction is molded.

JP 59-27049 A

  On the other hand, as a method for tiling a precast concrete panel (hereinafter also referred to as a PC panel) as an example of a PC member, a tile attaching method is generally used. Then, when this tipping method is combined with the above-described automatic concrete placing device, the following procedure is performed.

  First, a large number of tiles are laid on the upper surface of the molding table. Then, the concrete is placed on the tile while moving the concrete placement part in the extending direction of the molding table, thereby completing the PC panel with the tile fixed to the surface.

However, in this method, there is a possibility that the impact of the concrete during placement or the impact of the impact for compacting the concrete acts on the tiles, thereby disturbing the arrangement of the tiles or breaking the tiles. Therefore, it is difficult to combine the tipping method and the automatic concrete placing device. As a result, when finishing the PC panel with tiles, it is necessary to rely on the tile back-end method.
According to the tile finishing method, the automatic concrete placement device manufactures a PC panel for a tile base having an uneven surface, and after carrying the PC panel on site, the tile installation is performed on the site. Become.

However, the tile finishing method has the following problems.
(A) When installing tiles at the site, the plasterer first adjusts the surface of the PC panel with the ground surface adjustment mortar, and then the tiler tiles with the tiled mortar. This method increases the number of processes, and it is troublesome to adjust the schedule between the plasterer and the tile job.
(B) Further, in this method, an interface between the PC panel and the base preparation mortar and an interface between the base preparation mortar and the tile attaching mortar are formed as the joining interface related to the tile construction. Become. And, in the interface between the PC panel and the base adjustment mortar which is the former interface, the base adjustment mortar is mechanically bonded by the uneven shape of the surface of the PC panel, so that strong bonding can be expected at this interface, At the interface between the base adjustment mortar and the tile attaching mortar which is the latter interface, mechanical bonding is not ensured, and there is a risk of peeling at this interface and accompanying tile peeling.

  Here, it is considered that these problems can be generally solved by, for example, embedding and fixing a sheet-like rough surface material on the surface of the PC panel in advance when the PC panel is manufactured by the automatic concrete placing device. . That is, if the sheet-like rough surface material is embedded and fixed integrally on the surface of the PC panel in advance, the sheet-like rough surface material can be directly tiled with a mortar that is attached to the rough surface. The base adjustment mortar can be omitted. Further, if there is no base preparation mortar, the problem of interfacial peeling between the base preparation mortar and the tiled mortar as described above does not occur.

  However, in that case, the sheet-like rough surface material embedded and fixed in the PC panel is tiled, so that the sheet-like rough surface material has the same degree as that of the base adjustment mortar. High flatness is required.

  The present invention has been made in view of the conventional problems as described above, and its purpose is to place the cement-based fluidizing material while moving the placement portion for placing the cement-based fluidized material in a predetermined direction. Thus, in the method for producing a cementitious composition along a predetermined direction, a cementitious composition provided with a sheet-like rough surface material with high flatness is produced.

In order to achieve this object, the invention shown in claim 1
By moving a placing portion, which is provided above the molding table extending in a predetermined direction and in which the cement-based fluid material is cast toward the upper surface of the molding table, to the downstream side in the predetermined direction, A method for producing a cementitious composition along a direction,
When laying a sheet-like rough surface material for forming a rough surface on the cementitious composition on the upper surface of the molding table, only the end portion on the upstream side in the predetermined direction of the sheet-like rough surface material is the A sheet-like rough surface material laying and fixing step for fixing to the upper surface of the molding table;
With the sheet-like rough surface material gripped and pulled downstream in the predetermined direction, the cement-based fluidized material is beaten on the sheet-like rough surface material while moving the placing portion to the downstream side. And a placing step to be provided.

  According to the first aspect of the present invention, the cementitious composition is placed on the sheet-like rough surface material in a state where the downstream tension is applied to the sheet-like rough surface material. Therefore, it is possible to effectively prevent the sheet-like rough surface material from wrinkling, kinking, twisting, sagging, and the like during placement, and as a result, the sheet with high flatness on the surface of the cementitious composition. A rough surface material can be provided.

Invention of Claim 2 is a manufacturing method of the cementitious composition of Claim 1, Comprising:
In the sheet-like rough surface material laying and fixing step, a plurality of the sheet-like rough surface materials are laid intermittently side by side in the predetermined direction, and the upstream end of each sheet-like rough surface material Is fixed to the upper surface of the molding table,
In the placing step, the plurality of the sheet-like rough surfaces are continuously placed on all of the plurality of the sheet-like rough surfaces arranged in the predetermined direction. Forming a cementitious composition comprising the material,
After the placing step, the cement-based composition is divided by the unit of the sheet-like rough surface material,
The cutting position of the cementitious composition in the cutting process is a position of a gap between the sheet-like rough surfaces.

  According to the second aspect of the present invention, when the cementitious composition is divided in units of the sheet-like rough surface material, it is divided at the site of the gap between the sheet-like rough surface materials adjacent to each other in a predetermined direction. To do. That is, only the cementitious composition is cut at a portion where the sheet-like rough surface material is not present. Therefore, the sheet-like rough surface material is not damaged with this division, and the sheet-like rough surface material can thereby be provided on the surface of the cementitious composition in a completely healthy state.

Invention of Claim 3 is a manufacturing method of the cementitious composition of Claim 1, Comprising:
After the placing step, the cement-based composition is divided into a predetermined length in the predetermined direction together with the sheet-like rough surface material.

According to the third aspect of the present invention, a cement-based composition provided with a sheet-like rough surface material can be produced with a desired length.
In addition, since the cementitious composition provided with the sheet-like rough surface material is divided together with the sheet-like rough surface material, only the sheet-like rough surface material is not divided into a predetermined length such as a product length individually in advance. As a result, the process can be omitted.

Invention of Claim 4 is a manufacturing method of the cementitious composition of Claim 2 or 3, Comprising:
It has the secondary cutting process which cuts off the cutting | disconnection edge part of the cementitious composition dividedly formed by the said cutting process, It is characterized by the above-mentioned.

  According to the fourth aspect of the present invention, the length of the cement composition can be adjusted by adjusting the cutting length of the cut end. Therefore, the length of the cement composition can be finely finished to a predetermined length such as a product length.

Invention of Claim 5 is a manufacturing method of the cementitious composition of Claim 4, Comprising:
Between the cutting step and the secondary cutting step, by turning the cementitious composition cut in the cutting step upside down, performing the upside down step of positioning the sheet-like rough surface material on the upper surface,
In the secondary cutting step, the cementitious composition is cut from the upper surface to the lower surface together with the sheet-like rough surface material in a state where the sheet-like rough surface material is positioned on the upper surface of the cement-based composition. It is characterized by doing.

According to the fifth aspect of the present invention, it is possible to effectively suppress peeling (turning) and kinking of the sheet-like rough surface material that may occur when the cementitious composition is cut together with the sheet-like rough surface material.
That is, when the cementitious composition is cut from the upper surface to the lower surface in a state where the sheet-like rough surface material is located on the lower surface of the cement-based composition, the lower surface sheet-like rough surface material may be peeled off at the cutting position or in the vicinity thereof. In this regard, in the above-described manufacturing method, the above-described manufacturing method is performed after the sheet-like rough surface material is positioned on the upper surface of the cement-based composition by the upside down process. The body is cut together with the sheet-like rough surface material from the upper surface to the lower surface. As a result, the sheet-like rough surface material on the upper surface is cut while being pressed against the cementitious composition, so that the sheet-like rough surface material is effectively prevented from being peeled off or kinked at the cutting position or in the vicinity thereof. Is done. As a result, the sheet-like rough surface material can be provided on the cementitious composition with high flatness over the entire surface.

Invention of Claim 6 is a manufacturing method of the cementitious composition in any one of Claims 1 thru | or 5, Comprising:
The fixing of the end of the sheet-like rough surface material to the molding table is performed by interposing an adhesive member between the lower surface of the sheet-like rough surface material and the upper surface of the molding table. Features.

  According to the invention described in claim 6, the adhesive member is interposed between the lower surface of the sheet-like rough surface material and the upper surface of the molding table, and the upper surface of the sheet-like rough surface material and the cementitious composition. Since it is not arranged between the body and the adhesive member, a poorly joined portion does not occur between the sheet-like rough surface material and the cementitious composition. As a result, the sheet-like rough surface material can be provided on the cementitious composition with high bonding strength over the entire surface.

Invention of Claim 7 is a manufacturing method of the cementitious composition in any one of Claims 1 thru | or 6, Comprising:
When the direction perpendicular to the predetermined direction on the upper surface of the molding table is the width direction,
Regarding the dimension in the width direction, the sheet-like rough surface material is smaller than the upper surface of the molding table.

According to the seventh aspect of the present invention, it is possible to effectively prevent peeling and turning at both ends in the width direction of the sheet-like rough surface material.
That is, if both end edges in the width direction of the sheet-like rough surface material are aligned with both end edges in the width direction of the cement composition, both end edges of the sheet-like rough surface material are easily peeled off or turned up from the cement composition. With regard to this point, as in the above-described manufacturing method, if the sheet-like rough surface material is made smaller than the upper surface of the molding table with respect to the width direction, the cement is formed with the widthwise dimension of the upper surface of the molding table. Both edges of the sheet-like rough surface material can be positioned inside the width direction of the system composition, and as a result, peeling and turning at both ends in the width direction of the sheet-like rough surface material are effectively prevented. It becomes possible.

  ADVANTAGE OF THE INVENTION According to this invention, the cementitious composition provided with the sheet-like rough surface material with high flatness can be manufactured.

FIG. 1A is a schematic perspective view of a PC panel 1 manufactured by the manufacturing method of the first embodiment, and FIG. 1B is a BB arrow view in FIG. 1A. 1 is a schematic perspective view of an automatic concrete placing device 10. FIG. FIG. 3A is a central longitudinal cross-sectional view of the automatic concrete placing apparatus 10, and FIG. 3B is a BB arrow view in FIG. 3A. 4A is a side sectional view of a sheet-like rough surface material laying and fixing step according to the method for manufacturing the PC panel 1, and FIG. 4B is a top view thereof. FIG. 5A is a side sectional view of a placing process according to the method for manufacturing the PC panel 1, and FIG. 5B is a top view thereof. FIG. 6A is a side sectional view of a placing step and a dividing step according to the manufacturing method of the PC panel 1, and FIG. 6B is a top view thereof. FIG. 7A and FIG. 7B are explanatory diagrams of a problem when the single-sided tape 19 is used for fixing the sheet-like rough surface material 5 to the molding table 12, and FIG. 7C shows that the double-sided tape 18 is used for the fixing. These are explanatory views showing that this problem can be solved, both of which are side sectional views. It is side sectional drawing of a mode that concrete C is laid while pulling the sheet-like rough surface material 5 downstream. 9A and 9B are schematic side views for explaining the secondary cutting step. It is a schematic perspective view of PC panel 1 'of the form which does not have the margin part 3bk in the both ends 3ae and 3ae of a longitudinal direction. FIG. 11A is an explanatory diagram of a problem when the PC panel 1 is not turned upside down before the secondary cutting step, and FIG. 11B is a view showing this problem by turning the PC panel 1 upside down before the secondary cutting step. It is explanatory drawing which shows that can be solved, and all are side sectional drawings. FIG. 12A is a side sectional view of a sheet-like rough surface material laying and fixing step in the method of manufacturing the PC panel 1 ′ of the second embodiment, and FIG. 12B is a top view thereof. FIG. 13A is a side sectional view of a placing step and a dividing step in the method of manufacturing the PC panel 1 ′ of the second embodiment, and FIG. 13B is a top view thereof. FIG. 5 is a side sectional view showing a state in which concrete C is placed while pulling a sheet-like rough surface material 5 ″ to the downstream side. FIG. 15A is a side sectional view of the primary cutting step, and FIG. 15B is a side sectional view of the secondary cutting step.

=== First Embodiment ===
FIG. 1A is a schematic perspective view of a PC panel 1 manufactured by the manufacturing method of the first embodiment. Moreover, FIG. 1B is a BB arrow line view in FIG. 1A.
The PC panel 1 is a precast concrete panel in which one surface 1a is formed into a rough surface so that a tile as a surface finishing material can be retrofitted. That is, the PC panel 1 includes a concrete panel body 3 and a sheet-like rough surface material 5 that is integrally fixed to the surface 3a so as to make one surface 3a of the panel body 3 rough. ing. And after finishing to this state in a factory, it is conveyed toward the construction site.
At the construction site, the PC panel 1 is attached to, for example, the outer wall surface of the building housing to be attached with the sheet-like rough surface material 5 facing outward, and then to the surface 5a of the sheet-like rough surface material 5. Tiles (not shown) are pasted in order with pasting mortar. At this time, the pasting mortar is integrated with the sheet-like rough surface material 5 based on the anchor effect of the rough surface of the sheet-like rough surface material 5, and the pasting mortar enters the reverse tapered groove portion on the back of the tile. The sheet-like rough surface material 5 imparts a peeling prevention effect to the tiled finish layer. In addition, you may stick things other than a tile as a surface finishing material, for example, a stone material may be sufficient.

Hereinafter, the configurations 3 and 5 of the PC panel 1 will be described with reference to FIGS. 1A and 1B.
The panel body 3 is, for example, a rectangular plate, and its planar dimension is, for example, 3 meters in the longitudinal direction and 1.2 meters in the width direction, but is not limited thereto.
The panel body 3 is, for example, a prestressed concrete panel (corresponding to a cement-based composition) having a hollow structure in which weight reduction and strength enhancement are compatible. That is, in order to make a hollow structure, a plurality of holes 3h, 3h,... Are intermittently formed in the panel body 3 along the longitudinal direction in the width direction. In the panel body 3, tensioned PC steel wires 4, 4... (For example, PC steel strands) are embedded along the longitudinal direction of the panel body 3. In addition, the embedding position of the PC steel wires 4, 4... In the width direction is set, for example, in a portion between the holes 3h, 3h.

  The panel body 3 is basically an inseparable member, but strictly speaking, it has a three-layer structure in the thickness direction. That is, as shown in FIG. 1B, the first layer 3L1 provided with the sheet-like rough surface material 5, the second layer 3L2 adjacent to the first layer 3L1, and the third layer 3L3 adjacent to the first layer 3L1 are adjacent to each other. They are integrated inseparable from each other. The first layer 3L1 is made of, for example, low-fluidity zero slump concrete. The second layer 3L2 is also formed with, for example, the same type of zero slump concrete, but is formed as a separate layer because the placement timing is later than the first layer 3L1. The third layer 3L3 is formed by placing concrete having higher fluidity than the first layer 3L1 and the second layer 3L2 so as to form a smooth surface.

  By the way, the reason why zero slump concrete is used for the first layer 3L1 and the second layer 3L2 is that these layers 3L1 and 3L2 are simultaneously formed in parallel with the layers 3L1 and 3L2. This is for forming the aforementioned holes 3h, 3h.

  As shown in FIGS. 1A and 1B, the sheet-like rough surface material 5 covers the surface 3a of the first layer 3L1 over substantially the entire surface, and is fixed to the surface 3a so as not to be separated. As shown in the schematic enlarged side view of FIG. 1C, the sheet-like rough surface material 5 is obtained by applying polymer cement mortar 5 m to one side 5 sb of the three-dimensional mesh fiber sheet 5 s, and thereby, in the thickness direction thereof. A mortar layer 5 mL is provided in a portion near the center. Examples of the three-dimensional mesh fiber sheet 5s include a sheet in which fibers such as vinylon fibers are fixed to a nonwoven fabric such as spunbond by needle punching or the like. The fibers 5ss and 5ss of the three-dimensional mesh fiber sheet 5s protrude from both surfaces of the mortar layer 5mL.

  The sheet-like rough surface material 5 having such a structure is integrally joined to the surface 3a of the panel body 3 at the surface 5sb, for example, with the surface 5sb coated with polymer cement mortar facing the panel body 3. Has been. At this time, the mortar layer 5 mL of the sheet-like rough surface material 5 itself is the same cement-based material as the concrete of the panel body 3, and these are bonded with high affinity, and further, the mortar layer 5 mL The fibers 5ss protruding from the wall are embedded in the concrete of the panel main body 3 to exert an anchor effect, whereby the both 3 and 5 are firmly integrated. Further, even on the other surface 5sa, there is a fiber 5ss protruding outward from the mortar layer 5mL, and the fiber 5ss forms a rough surface on the surface 1a of the PC panel 1, and the rough surface is It is used for the firm attachment of tiles as described above.

  The planar shape of the sheet-like rough surface material 5 is a rectangular shape that is substantially similar to the panel body 3 as shown in FIG. 1A. However, the planar size is slightly smaller than the planar size of the panel body 3 in both the longitudinal direction and the width direction, that is, the sheet-like rough surface material 5 is fixed to the panel body 3. In the peripheral edge 3ae of the surface 3a of the panel body 3, blank portions 3bk that are not covered with the sheet-like rough surface material 5 are present in a frame shape along the four sides. As a result, the protrusion of the edge of the sheet-like rough surface material 5 from the panel body 3 is effectively avoided, and as a result, peeling and turning-up from the edge are effectively prevented.

  The PC panel 1 provided with such a sheet-like rough surface material 5 is manufactured using an automatic concrete placing apparatus 10 in a factory. 2 to 3B are explanatory views of the automatic concrete placing apparatus 10. FIG. 2 is a schematic perspective view of the apparatus 10. 3A is a longitudinal sectional view of the same center, and FIG. 3B is a view taken along the line BB in FIG. 3A. 2A to 3A, the PC steel wires 4, 4,... That should be originally arranged along the extending direction are omitted in order to prevent complication of the drawings.

  As shown in FIG. 2, the automatic concrete placing apparatus 10 includes a molding table 12 that extends in a horizontal direction on a floor surface BS in a factory building, and an upper portion of the molding table 12 over the molding table 12. A concrete placement section 20 (placement section) provided so as to be movable along the extending direction (corresponding to a predetermined direction) and placing concrete C (corresponding to a cement-based fluidized material) toward the upper surface 12a of the molding table 12. Equivalent).

  The molding table 12 has a substantially flat upper surface 12a having a length of, for example, 200 m along the horizontal extending direction as a molding surface, and concrete C is placed toward the upper surface 12a. The width direction dimension W12a of the upper surface 12a is aligned with the width dimension W1 of the PC panel 1 (which is also the width dimension W3 of the panel body 3 (FIG. 1A)). Is formed in a state in which the width direction of the upper surface 12a of the molding table 12 faces and the longitudinal direction faces the extending direction.

  As shown in FIG. 3A, the concrete placing part 20 has concrete C placing ports 21, 22, and 23 at the lower part thereof. That is, as the placement port, the first placement port 21 for placing the concrete C1 for the first layer 3L1, the second placement port 22 for placing the concrete C2 for the second layer 3L2, and the third A third placement port 23 for placing the concrete C3 for the layer 3L3 is arranged in this order from downstream to upstream in the extending direction. Therefore, while the concrete placement part 20 moves to the downstream side in the extending direction, the corresponding concretes C1, C2, and C3 are continuously placed from the placement ports 21, 22, and 23, respectively. First, the first layer 3L1 is cast and formed on the upper surface 12a of the molding table 12, the second layer 3L2 is cast and formed on the first layer 3L1, and finally the third layer is formed on the second layer 3L2. 3L3 is cast and formed.

  Moreover, as shown to FIG. 3B, the concrete placement part 20 has the formwork members 25 and 25 for side surface formation in each edge part of the width direction, respectively. Then, these side surface forming mold members 25, 25 prevent flow of the placed concrete C outward in the width direction, whereby the side surfaces 3 e, 3 e of the panel body 3 are formed. The These mold members 25 and 25 move in the extending direction together with the concrete placing portion 20, but the width direction position of the molding surface 25 a of each mold member 25 is the side edge of the upper surface 12 a of the molding table 12. It is maintained so as to be substantially flush with 12ae1 (FIG. 3B). Therefore, the width dimension W3 (width direction dimension W3) of the panel body 3 is the same as the width dimension W12a (width direction dimension W12a) of the upper surface 12a of the molding table 12.

  Further, as shown in FIG. 3A, a plurality of hole forming mold members 27 are also mounted on the concrete placing portion 20 for the purpose of forming the above-described holes 3h, 3h. Each hole forming mold member 27 is a pipe member having an outer shape corresponding to the shape of the hole 3h in charge. Each hole forming mold member 27 is suspended and supported by the concrete placing portion 20 via an appropriate stay member with the downstream end portion as a supporting point, and thereby, the hole forming mold member is formed. The member 27 is disposed between the first and second placement ports 21 and 22 described above and the upper surface 12 a of the molding table 12. Therefore, when the concrete C1 for the first layer 3L1 is placed from the first placement port 21 and the concrete C2 for the second layer 3L2 is placed from the second placement port 22, the upper surface of the molding table 12 is placed. The space above 12a is filled with concrete C except for each hole forming mold member 27. As a result, the first layer 3L1 having holes 3h, 3h,. And the second layer 3L2 are formed.

  Moreover, the concrete placing part 20 has a plurality of thrust bars (not shown) provided so as to be able to advance and retreat downward. Then, the concrete rod placed on the molding table 12 is driven and driven by driving the thrust rod downward and forward while the concrete C is being placed, whereby the low-fluidity zero slump concrete C1 and C2 are Then, it is filled up to every corner in the vicinity of the side surface forming mold members 25 and 25 and the hole forming mold member 27.

  4A to 6B are explanatory diagrams of a procedure for manufacturing the PC panel 1 provided with the sheet-like rough surface material 5 by using the automatic concrete placing device 10 having such a configuration. 4A to 6B, a side sectional view is shown in FIG. 4A and a top view is shown in FIG. 4B. Further, in FIGS. 5A to 6B, the holes 3h, 3h... And the PC steel wires 4, 4.

  First, as shown in FIGS. 4A and 4B, a plurality of PC steel wires 4, 4... Along the extending direction are arranged above the upper surface 12 a of the molding table 12. Each of the PC steel wires 4 is arranged with a length that extends over substantially the entire length (for example, about 200 m) of the upper surface 12 a of the molding table 12. And since the method of applying prestress by the PC steel wire 4 is a so-called pretension system, the PC steel wire 4 is put in a tension state at this point. In addition, if it will be in a tension | tensile_strength state, the PC steel wire 4 will be in the state which floated from the upper surface 12a of the molding stand 12. FIG.

  Next, a plurality of sheet-like rough surface materials 5, 5... Are intermittently arranged in the extending direction on the upper surface 12 a of the molding table 12 (corresponding to a sheet-like rough surface material laying and fixing step). That is, each sheet-like rough surface material 5 is arranged on the upper surface 12a of the molding table 12 while leaving a gap δ5 between the sheet-like rough surface materials 5 adjacent to each other in the extending direction. The gap δ5 is formed by placing a continuous body of concrete C hardened on the molding table 12 after each concrete panel C is continuously cast over the entire length of the molding table 12 in the subsequent casting process. The cutting margin part QC1 (FIGS. 6A and 6B) when dividing into lengths (product lengths) and the above-described marginal part 3bk.

  Further, as described above with reference to FIGS. 1A and 2, the width direction dimension W12a of the upper surface 12a of the molding table 12 is aligned with the width direction dimension W3 of the panel body 3 to be molded. The widthwise dimension W5 of the sheet-like rough surface material 5 is slightly smaller than the widthwise dimension W3 of the panel body 3. When each sheet-like rough surface material 5 having such dimensions is laid on the upper surface 12a of the molding table 12, the sheet-shaped rough surface material 5 is covered at each end in the width direction of the upper surface 12a of the molding table 12. The laying position in the width direction of the sheet-like rough surface material 5 is adjusted so that the non-protruding portions 12ae and 12ae are formed along each edge of the upper surface 12a. Thus, after the PC panel 1 is completed, the above-described marginal portions 3bk and 3bk that are not covered with the sheet-like rough surface material 5 are formed at both ends 3ae and 3ae in the width direction of the panel body 3. .

  The sheet-like rough surface materials 5, 5... Arranged in this way are fixed to the upper surface 12 a of the forming table 12 for each sheet-like rough surface material 5, and the fixing is performed for the sheet-like rough surface. It is made only by the end portion 5eu on the upstream side in the extending direction of the material 5 (FIGS. 4A and 4B). That is, a double-sided tape 18 (corresponding to an adhesive member) is interposed between the lower surface of the upstream end portion 5eu and the upper surface 12a of the molding table 12 over substantially the entire length in the width direction. The sheet-like rough surface material 5 is fixed to the upper surface 12a of the molding table 12 only by the upstream end 5eu (hereinafter also referred to as the upstream edge 5eu), and is not fixed by other portions. To do.

  The reason for fixing only the upstream edge portion 5eu in this way is that the sheet-like rough surface material 5 is pulled manually downstream in the extending direction in the concrete C placing process performed thereafter. There will be described later.

  Here, instead of the double-sided tape 18 described above, a single-sided tape 19, that is, a normal tape member 19 having an adhesive force only on one side, may be used for fixing the edge portion 5eu. As shown in FIG. 7A, a single-sided tape 19 is bridged and fixed between the upper surface of the sheet-like rough surface material 5 and the upper surface 12a of the molding table 12. However, if it does so, as shown to FIG. 7B, the part 19a affixed on the upper surface of the sheet-like rough surface material 5 among the single-sided tapes 19 will be the first layer 3L1 (C1) ) Between the sheet-like rough surface material 5 and the first layer 3L1 (C1). In this regard, when the double-sided tape 18 is used as described above, the double-sided tape 18 is interposed between the lower surface of the sheet-like rough surface material 5 and the upper surface 12a of the molding table 12, as shown in FIG. 7C. Therefore, the poor joint portion Fj does not occur between the sheet-like rough surface material 5 and the first layer 3L1 (C1), and as a result, the sheet-like rough surface material 5 can be effectively prevented from being turned up. In addition, it replaces with the double-sided tape 18, and it is an adhesive (equivalent to an adhesive member) only to the edge part 5eu of the sheet-like rough surface material 5, or only to the part of the upper surface 12a of the molding stand 12 facing the edge part 5eu. Is applied, even if the edge portion 5eu is fixed, it is possible to prevent the occurrence of a joint failure portion Fj.

  Then, as shown in FIG. 5A and FIG. 5B, the concrete placement part 20 is started, and thereby the placement part 20 is extended to the upper surface 12a of the molding table 12 toward the downstream side in the extending direction. Move continuously over. During this movement, concrete C (C1, C2, C3) is continuously placed from the first to third placement ports 21, 22, 23 toward the upper surface 12a of the molding table 12, respectively. Thus, as shown in FIGS. 6A and 6B, a continuous body of concrete C having a length over the entire length is formed on the upper surface 12a of the forming table 12 (corresponding to the placing step). That is, the concrete C is continuously cast on all of the plurality of sheet-like rough surface materials 5, 5... Arranged in the extending direction, whereby a plurality of sheet-like rough surface materials arranged in the extending direction. One continuous body of concrete C comprising 5, 5,.

  Here, when the concrete placing portion 20 passes over the respective sheet-like rough surface materials 5 and places the concrete C, an operator (not shown) standing by in the vicinity of the concrete placing portion 20 places the side surface in FIG. As shown in the figure, the downstream end portion 5ed of the sheet-like rough surface material 5 to be cast is gripped, and the sheet-like rough surface material 5 is pulled downstream in the extending direction. . Then, since the upstream edge portion 5eu is fixed to the molding table 12, tension in the extending direction is applied to the sheet-like rough surface material 5 with the edge portion 5eu as a fulcrum. And this tension state is maintained until the concrete placement part 20 has almost passed through the position of the sheet-like rough surface material 5 to be placed. As a result, each sheet-like rough surface material 5 is placed with concrete C from above in a state where a downstream tension is applied. And if it does in this way, generation | occurrence | production of the wrinkle of the sheet-like rough surface material 5 at the time of placement, a twist, a slack, etc. can be prevented effectively, As a result, it is high on the surface of the concrete C which should become the panel main body 3 The sheet-like rough surface material 5 can be fixed with flatness.

  When a concrete C continuum (corresponding to a cement-based composition) is molded in this way, after the hardening, the tension of the PC steel wire 4 is released, and thereby, the concrete C continuum is subjected to compression prestress. Is done.

  Then, next, this continuous body of concrete C is divided into the length (product length) of the PC panel 1 (corresponding to a dividing step). This division is performed by, for example, a cutting machine (not shown) having a disk-shaped rotary blade. Further, as shown in FIGS. 6A and 6B, the division is performed at a cutting allowance portion QC1 (corresponding to a dividing position) set in units of the sheet-like rough surface material 5. As described above, the cutting margin portion QC1 is included in the portion of the gap δ5 between the sheet-like rough surface materials 5 and 5 adjacent in the extending direction, and the portion of the gap δ5 includes the sheet-like rough surface. Material 5 does not exist. Therefore, only the concrete C and the PC steel wire 4 are cut at the time of the division, and the sheet-like rough surface material 5 is not cut. As a result, the sheet-like rough surface material 5 is not damaged at all.

  As described above, the PC panel 1 having the sheet-like rough surface material 5 as shown in FIG. 1 is completed. As described above, the PC panel 1 has the blank portion 3bk that is not covered with the sheet-like rough surface material 5 along the four sides in a frame shape, but the size of the blank portion 3bk is large. The height can be adjusted by adjusting the width dimension W5 of the sheet-like rough surface material 5 with respect to the width dimension W12a of the upper surface 12a of the molding table 12 and adjusting the size of the gap δ5.

  By the way, depending on the case, the above-described dividing step may be simply meant as a primary cutting step for roughly separating the PC panels 1, 1... From the concrete C continuous body. After the cutting step, a secondary cutting step is performed for aligning the length (length in the longitudinal direction) of each PC panel 1 with a specified product length. In this secondary cutting process, the respective cut ends 1e and 1e formed in the PC panel 1 in the primary cutting process are cut out (see, for example, FIG. 9B), thereby adjusting the length of the PC panel 1 to the product length. To do. And according to such a procedure, the length of the PC panel 1 can be finished finely.

9A and 9B are schematic side views for explaining the secondary cutting step.
First, before the secondary cutting process, the PC panel 1 of FIG. 9A divided and formed in the primary cutting process is inverted upside down as shown in FIG. 9B and placed on an appropriate mounting table 40. Thereby, the PC panel 1 is in a state in which the sheet-like rough surface material 5 is positioned on the upper surface. Then, in this state, the PC panel 1 ′ is cut from the upper surface to the lower surface, and thereby, the divided end portions 1e and 1e of the PC panel 1 are cut out. The cutting position QC2 at this time is determined based on the cutting length, and therefore may be set to the blank portion 3bk (QC2a) not covered with the sheet-like rough surface material 5, or the sheet-like rough surface material 5 It may be set to the part QC2b covered with.

  Here, as shown in FIG. 9B, when the cutting position QC2 is set to the blank portion 3bk which is the former part QC2a, a part of the blank portion 3bk remains on the PC panel 1. Therefore, the PC panel 1 to be finally manufactured has a frame-like blank portion 3bk on the peripheral edge portion 3ae of the surface 3a of the panel body 3 as in the first embodiment (FIG. 1A). Become.

  On the other hand, when the cutting position QC2 is set to the latter part QC2b (that is, the part QC2b covered with the sheet-like rough surface material 5), the finally manufactured PC panel 1 ′ is shown in FIG. As described above, the blank portion 3bk is present at both end portions 3ae and 3ae in the width direction, but is not present at both end portions 3ae in the longitudinal direction. That is, in the longitudinal direction, the PC panel 1 ′ in which the surface 3 a of the panel body 3 is covered with the sheet-like rough surface material 5 ′ over the entire length is manufactured.

  When the latter PC panel 1 ′ is manufactured, that is, when the part QC2b covered with the sheet-like rough surface material 5 is cut as shown in FIG. 9B, the PC is cut before the secondary cutting step. Turning the panel 1 upside down has a big meaning. 11A and 11B are explanatory diagrams thereof. Note that FIG. 11A shows a case where it is not turned upside down as a comparative example, and FIG. 11B shows a case where it is turned upside down.

First, in the case of the comparative example of FIG. 11A, the PC panel 1 is cut from the upper surface to the lower surface at each divided end 1e in a state where the sheet-like rough surface material 5 is positioned on the lower surface of the PC panel 1. However, if it does so, there exists a possibility that the sheet-like rough surface material 5 may peel from the panel main body 3, or may be twisted in the cutting position QC2b or its vicinity position.
In this regard, as shown in FIG. 11B, the sheet-like rough surface material 5 is positioned on the upper surface of the PC panel 1 by being turned upside down, and then the panel body 3 is moved together with the sheet-like rough surface material 5 from the upper surface. If cut to the lower surface, the sheet-like rough surface material 5 on the upper surface is cut while being pressed against the panel body 3, so that the sheet-like rough surface material 5 is peeled off or kinked at the cutting position QC2b or in the vicinity thereof. It is effectively suppressed. As a result, it is possible to manufacture the PC panel 1 ′ in which the sheet-like rough surface material 5 is provided on the surface with high flatness.

=== Second Embodiment ===
In the manufacturing method of the second embodiment, a PC panel 1 ′ having substantially the same form as the PC panel 1 ′ shown in FIG. 10 is manufactured. That is, as shown in FIG. 10, a PC panel 1 ′ having a configuration in which the blank portion 3bk is present at both end portions 3ae and 3ae in the width direction but not at both end portions 3ae in the longitudinal direction is manufactured. Is done. In other words, in the longitudinal direction, the PC panel 1 ′ in the form in which the surface 3 a of the panel body 3 is covered with the sheet-like rough surface material 5 ′ over the entire length thereof is manufactured.

  12A to 13B are explanatory diagrams of a method for manufacturing the PC panel 1 '. In any of FIGS. 12A to 13B, a side sectional view is shown in FIG. 12A, and a top view is shown in FIG. Moreover, in FIG. 13A and FIG. 13B, in order to prevent the complication of a figure, a part of hole part 3h, 3h ... and PC steel wire 4,4 ... is abbreviate | omitted and shown.

  This PC panel 1 ′ is also manufactured by the automatic concrete placing apparatus 10 as in the first embodiment. And the main difference from 1st Embodiment exists in the installation aspect of the sheet-like rough surface material 5 'to the upper surface 12a of the molding stand 12. FIG. That is, in the first embodiment described above, the sheet-like rough surface materials 5, 5... That have been individually divided into sizes corresponding to the size of the PC panel 1 in advance are intermittently provided in the extending direction on the upper surface 12a of the molding table 12. (FIGS. 4A and 4B), as shown in FIGS. 12A and 12B, the sheet-like rough surface material 5 ′ according to the second embodiment is laid on the upper surface 12a of the molding table 12. It is not yet divided individually, that is, the sheet-like rough surface material 5 ′ is a long body 5 ″ having a length (for example, 200 m) over substantially the entire length of the upper surface 12 a of the molding table 12. It is laid continuously over substantially the entire length of 12a. At this time, the PC steel wires 4, 4... Are already in tension and are floating above the molding table 12.

  In the second embodiment, only the upstream end portion 5 ″ eu of the sheet-like rough surface material 5 ″ is molded with the double-sided tape 18 (or the single-sided tape 19) over substantially the entire length in the width direction. 12 is fixed to the upper surface 12a. That is, the portion other than the upstream end portion 5 ″ eu is not fixed (corresponding to the sheet-like rough surface material laying fixing step).

  Then, the concrete placement unit 20 is activated, and the placement unit 20 moves from the respective placement ports 21, 22 and 23 while moving to the downstream side in the extending direction as shown in FIGS. 13A and 13B. Concrete C (C1, C2, C3) is placed on the sheet-like rough surface material 5 ″ (corresponding to the placing step). Thereby, a continuous body of concrete C having substantially the same length as the entire length thereof is molded on the upper surface 12a of the molding table 12 in a state where the sheet-like rough surface material 5 '' is fixed over the entire length of the lower surface. .

  Here, at the time of this placement, an operator (not shown) grasps the sheet-like rough surface material 5 '' at a position immediately downstream of the concrete placement portion 20 as shown in a side sectional view of FIG. The sheet-like rough surface material 5 ″ is pulled downstream in the extending direction. Then, the gripping position is sequentially moved to the downstream side in conjunction with the movement of the concrete placing portion 20. As a result, the concrete C is placed over the entire length in the extending direction with the downstream tension applied to the sheet-like rough surface material 5 ″. As a result, as in the case of the first embodiment, it is possible to effectively prevent the occurrence of wrinkles, kinks, twists and sagging of the sheet-like rough surface material 5 '' at the time of placing, and as a result, the concrete C The sheet-like rough surface material 5 '' can be fixed to the surface of the continuous body with high flatness.

  If it does so, the tension | tensile_strength of the PC steel wire 4 will be released after the hardening of the shape | molded concrete C continuous body, and, thereby, the prestress of compression will be provided to the continuous body of concrete C.

  Then, using the same cutting machine (not shown) as in the first embodiment, the concrete C continuum (corresponding to a cementitious composition) together with the sheet-like rough surface material 5 '' is used for the PC panel 1. Is divided at a cutting position QC1 ′ corresponding to the length (product length) (corresponding to a cutting step, see FIGS. 13A and 13B).

  Here, the division is equivalent to the primary cutting described above, that is, for roughly dividing a continuous body of concrete C into individual PC panels 1 ′. Therefore, after this primary cutting (FIG. 15A), as shown in FIG. 15B, secondary cutting is performed at an appropriate cutting position QC2 'on each PC panel 1' (corresponding to a secondary cutting step). As a result, the divided end portions 1'e and 1'e of the PC panel 1 'are cut with an appropriate cutting length, and as a result, the length of the PC panel 1' is finished to a specified product length.

  Here, from the viewpoint of preventing peeling or turning of the sheet-like rough surface material 5 ′ (5 ″) at the time of cutting, ideally, the sheet-like rough surface material 5 at the time of cutting is the same as described above. It is preferable that '(5 ″) is located on the upper surface of the continuous body of concrete C (FIG. 15B). However, in the primary cutting process, it is difficult to perform upside down because the total length of the continuous body of concrete C is, for example, 200 m. Therefore, as shown in FIG. 13A or FIG. 15A, the primary cutting is performed in a state where the sheet-like rough surface material 5 ″ is located on the lower surface of the continuous body of concrete C. That is, when the continuous body of concrete C placed on the molding table 12 is cured in the placing step, the continuous body of concrete C is cut from the upper surface to the lower surface as it is, and when the lower surface is cut. The sheet-like rough surface material 5 '' is also cut together.

  On the other hand, at the time of secondary cutting, the continuous body of concrete C has been individually divided into the size of the PC panel 1 ′ by the primary cutting described above, and if the size of the PC panel 1 ′ is concerned, it can be easily moved up and down. It can be reversed. Therefore, the secondary cutting is performed with the sheet-like rough surface material 5 'positioned on the upper surface of the PC panel 1' as shown in FIG. 15B. That is, an upside down process of turning the PC panel 1 'upside down is performed between the primary cutting process of FIG. 15A and the secondary cutting process of FIG. 15B. Therefore, in the secondary cutting step, as shown in FIG. 15B, the panel body 3 is placed on the upper surface together with the sheet-like rough surface material 5 ′ in a state where the sheet-like rough surface material 5 is positioned on the upper surface of the PC panel 1 ′. In this case, since the sheet-like rough surface material 5 on the upper surface is cut while being pressed against the panel body 3, the sheet-like rough surface material 5 ′ is cut at the cutting position QC2 ′ or Peeling or kinking in the vicinity thereof is effectively suppressed, and it becomes possible to manufacture the PC panel 1 ′ in which the sheet-like rough surface material 5 ′ is provided on the surface with high flatness.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The deformation | transformation as shown below is possible in the range which does not deviate from the summary.

In the above-described embodiment, as an example of the sheet-like rough surface material 5 (5 ′, 5 ″), the solid mesh fiber sheet 5s is coated with the polymer cement mortar 5m, but is not limited thereto. That is, as long as it is a sheet-like member that can form a rough surface on the panel body 3 and has a tensile strength that can withstand the tension in the extending direction applied when the concrete C is placed, it may be used. .
However, the exemplified sheet-like rough surface material 5 (5 ′, 5 ″) has a mortar layer 5 mL, and the mortar layer 5 mL functions as a water shielding layer. Therefore, during the placement of the concrete C, the fluid such as the cement paste passes (leaks) the sheet-like rough surface material 5 (5 ′, 5 ″) in the thickness direction, and the sheet-like rough surface material 5 (5 ', 5'') can be prevented from oozing out. As a result, the fiber 5ss on one surface 5sa of the sheet-like rough surface material 5 (5 ′, 5 ″) is buried in the cement paste of the concrete C, and the sheet-like rough surface material 5 (5 ′, 5 ′). ') Can be reliably prevented from functioning as a rough surface.

In the above-described embodiment, the sheet-like rough surface materials 5 and 5 ″ are pulled in the extending direction by the human power of the operator, but the present invention is not limited to this. For example, an appropriate tension applying mechanism may be mounted on the concrete placing unit 20 and performed. As an example of this tension applying mechanism, a plurality of gripping portions that grip the sheet-like rough surface materials 5 and 5 '', and a drive mechanism such as a hydraulic cylinder that moves these gripping portions to the downstream side in the extending direction, The configuration possessed can be shown. And when this structure is applied to 1st Embodiment, whenever a concrete placement part 20 finishes passing the position of the sheet-like rough surface material 5 during placement, a holding | grip part is a sheet-like shape currently hold | gripped. The gripping of the rough surface material 5 is released, and the downstream end 5ed of the sheet-shaped rough surface material 5 arranged next to the downstream side is gripped and pulled to the downstream side. Repeat for face material 5.
Similarly, when such a configuration is applied to the second embodiment, as the concrete placing part 20 moves, the gripping part sequentially determines the gripping position of the sheet-like rough surface material 5 ''. Thus, the downstream tension in the extending direction is applied to the portion of the sheet-like rough surface material 5 '' where the concrete C is placed, by shifting the position downstream of the concrete placing section 20. Give.

  In the embodiment described above, the holes 3h, 3h,... Are provided in the PC panel 1, 1 'for the purpose of reducing the weight, but the present invention is not limited to this, and the holes 3h, 3h,. In this case, the hole forming mold member 27 is not mounted on the concrete placing portion 20, and normal concrete can be used instead of zero slump concrete.

  In the above-described embodiment, the panel body 3 of the PC panels 1 and 1 ′ has a three-layer structure in the thickness direction. However, the panel body 3 is not limited to this, and may have a single-layer structure or a plurality of layers other than three layers. It may be the structure.

  In the above-described embodiment, after placing the PC steel wire 4 on the molding table 12, the sheet-like rough surface material 5 (5 ″) is laid on the upper surface 12a of the molding table 12. The reverse is also acceptable. That is, the PC steel wire 4 may be disposed above the molding table 12 after the sheet-like rough surface material 5 (5 ″) is laid on the molding table 12.

  In the above-described embodiment, concrete C is exemplified as an example of the cement-based fluid material. However, the present invention is not limited to this, and mortar or cement may be used. Furthermore, you may mix a reinforcing fiber with these concrete, mortar, and cement.

1 PC panel, 1 'PC panel,
1a surface, 1e split end, 1'e split end,
3 Panel body (cement-based composition),
3L1 first layer, 3L2 second layer, 3L3 third layer,
3a surface, 3ae peripheral edge (both ends), 3bk marginal part,
3e side, 3h hole,
4 PC steel wire,
5 sheet-like rough surface material, 5a surface, 5ed end, 5eu end edge (end),
5 'sheet-like rough surface material, 5 "sheet-like rough surface material, 5" eu end,
5m polymer cement mortar, 5mL mortar layer,
5s solid mesh fiber sheet, 5sa surface, 5sb surface, 5ss fiber,
10 automatic concrete placing device, 12 molding table, 12a upper surface,
12ae1 side edge, 12ae part,
18 double-sided tape (adhesive member), 19 single-sided tape, 19a part,
20 Concrete placement part (placement part),
21 First placing port, 22 Second placing port, 23 Third placing port,
25 Formwork member for side surface formation, 25a molding surface,
27 Forming member for hole formation,
40 mounting table,
BS floor,
C Concrete (cement-based fluid material),
C1 concrete, C2 concrete, C3 concrete,
Fj joint failure part,
QC1 cutting allowance (dividing position), QC1 'dividing position,
QC2 cutting position, QC2a cutting position, QC2b cutting position,
QC2 'cutting position

Claims (7)

By moving a placing portion, which is provided above the molding table extending in a predetermined direction and in which the cement-based fluid material is cast toward the upper surface of the molding table, to the downstream side in the predetermined direction, A method for producing a cementitious composition along a direction,
When laying a sheet-like rough surface material for forming a rough surface on the cementitious composition on the upper surface of the molding table, only the end portion on the upstream side in the predetermined direction of the sheet-like rough surface material is the A sheet-like rough surface material laying and fixing step for fixing to the upper surface of the molding table;
With the sheet-like rough surface material gripped and pulled downstream in the predetermined direction, the cement-based fluidized material is beaten on the sheet-like rough surface material while moving the placing portion to the downstream side. A method for producing a cementitious composition, comprising: a placing step. A method for producing a cementitious composition according to claim 1,
In the sheet-like rough surface material laying and fixing step, a plurality of the sheet-like rough surface materials are laid intermittently side by side in the predetermined direction, and the upstream end of each sheet-like rough surface material Is fixed to the upper surface of the molding table,
In the placing step, the plurality of the sheet-like rough surfaces are continuously placed on all of the plurality of the sheet-like rough surfaces arranged in the predetermined direction. Forming a cementitious composition comprising the material,
After the placing step, the cement-based composition is divided by the unit of the sheet-like rough surface material,
The method for producing a cementitious composition, wherein the dividing position of the cementitious composition in the dividing step is a position of a gap between the sheet-like rough surface materials. A method for producing a cementitious composition according to claim 1,
A method for producing a cementitious composition comprising the step of dividing the cementitious composition together with the sheet-like rough surface material into a predetermined length in the predetermined direction after the placing step. A method for producing a cementitious composition according to claim 2 or 3,
The manufacturing method of the cementitious composition characterized by having the secondary cutting process which cuts off the cutting | disconnection edge part of the cementitious composition dividedly formed by the said cutting process. A method for producing a cementitious composition according to claim 4,
Between the cutting step and the secondary cutting step, by turning the cementitious composition cut in the cutting step upside down, performing the upside down step of positioning the sheet-like rough surface material on the upper surface,
In the secondary cutting step, the cementitious composition is cut from the upper surface to the lower surface together with the sheet-like rough surface material in a state where the sheet-like rough surface material is positioned on the upper surface of the cement-based composition. A method for producing a cementitious composition, characterized by comprising: A method for producing a cementitious composition according to any one of claims 1 to 5,
The fixing of the end of the sheet-like rough surface material to the molding table is performed by interposing an adhesive member between the lower surface of the sheet-like rough surface material and the upper surface of the molding table. A method for producing a cementitious composition. A method for producing a cementitious composition according to any one of claims 1 to 6,
When the direction perpendicular to the predetermined direction on the upper surface of the molding table is the width direction,
The manufacturing method of the cementitious composition characterized by the said sheet-like rough surface material being smaller than the upper surface of the said forming stand regarding the dimension of the said width direction.