JP2021110206A - Precast concrete wall member and manufacturing method thereof - Google Patents

Abstract

To provide a precast concrete wall member provided with a layer made of light-weight thermal insulation material filled therein.SOLUTION: A precast concrete wall member comprises: a wall surface material 12 composed of outer wall parts or inner wall parts with a specific thickness, and wall side surface parts; partition frame bodies 10 composed of polystyrene foam moldings surrounded with the outer wall parts and the wall side surface parts and positioned in the wall surface material 12; a filled thermal insulation material 11 made of foam mortar filled within an area surrounded with the partition frame bodies 10.SELECTED DRAWING: Figure 1

Description

The present invention relates to a precast concrete wall member and a method for manufacturing the same, and more particularly to a precast concrete wall member provided with a layer of a lightweight filled heat insulating material inside and a method for manufacturing the same.

When a precast concrete wall member (hereinafter referred to as a precast wall member) is used for the outer wall surface of a building, it is common to install a heat insulating material on the indoor side of the precast wall member. In addition, since this type of precast wall member is heavy, in order to reduce the weight of the precast wall member and to reduce the number of members for forming the wall portion, the inside of the precast wall member has a heat insulating property and is lightweight. It has also been proposed to provide a layer of material.

In Patent Document 1, in order to provide a layer of a filling heat insulating material inside the precast wall member, a formwork is used (use of a floating formwork, double striking of resin mortar 4, etc.) inside the precast wall member. A precast curtain wall plate made of a resin mortar in which a recess 4a is provided and the recess 4a is filled with an air mortar 5 is disclosed.

Japanese Unexamined Patent Publication No. 4-231538

However, it is troublesome to install the floating formwork inside the precast wall member so as to be isolated from the outer peripheral formwork, and it is also troublesome to remove the floating formwork after the resin mortar is cured. Alternatively, when the resin mortar is hit twice instead of using the floating formwork, it takes time and effort to hit the resin mortar twice and to install and remove the formwork.

Therefore, an object of the present invention is to provide a precast wall member in which a filled heat insulating material is filled therein, and a manufacturing method capable of easily manufacturing the precast wall member.

In order to achieve the above object, the precast concrete wall member of the present invention is surrounded by a wall surface material composed of an outer wall portion and a wall side surface portion having a predetermined thickness, and the outer wall portion and the wall side surface portion. It is characterized by comprising a partition frame body located inside and a filled heat insulating material filled in a range surrounded by the partition frame body.

As another invention, a wall surface material composed of an outer wall portion, an inner wall portion, and a wall side surface portion having a predetermined thickness, and a partition frame located in the wall surface member surrounded by the outer wall portion, the inner wall portion, and the wall side surface portion. It is characterized by comprising a body and a filled heat insulating material filled in a range surrounded by the partition frame body.

As a method for manufacturing a precast concrete wall member, the present invention comprises placing an outer wall portion of a wall surface material on a bed and in an outer peripheral formwork installed on the bed, and using the outer peripheral formwork on the outer wall portion of the outer wall surface material. It is characterized in that the partition frame bodies are placed at intervals, the inside of the partition frame is filled with a filling heat insulating material, and the wall side surface portion of the wall surface material is placed between the partition frame body and the outer peripheral formwork. And.

In this manufacturing method, it is preferable that the wall surface material is further cast with the filled heat insulating material and an inner wall portion covering the upper surface of the wall side surface portion.

The filled heat insulating material as a wall member is preferably made of foamed mortar.

Further, it is preferable that the partition member is made by assembling a polystyrene foam molded product.

According to the present invention, it is possible to easily manufacture a precast wall member provided with a lightweight filled heat insulating material inside.

(A) is a front view of a precast wall member (finished product) according to the first embodiment of the present invention, (b) is a bottom sectional view shown by an Ib-Ib cross-sectional line of (a), and (c) is a bottom sectional view. , (A), a side sectional view shown by an Ic-Ic sectional line. (A) is a step of placing the lower wire mesh bar, the dowel bar, placing the first layer (outer wall portion), and placing the partition frame body at the time of manufacturing the precast wall member according to the first embodiment of the present invention. , (B) is a filling step of the second layer (filled heat insulating material), (c) is a reinforcing step of the upper wire mesh bar, and (d) is a third layer (inner wall portion, wall side surface). Each cross-sectional view which showed the placing process of. (A) is a front view of a precast wall member (finished product) according to a second embodiment of the present invention, (b) is a bottom sectional view shown by a cross-sectional line IIIb-IIIb of (a), and (c) is a bottom sectional view. , (A) is a side sectional view shown by a cross-sectional line of IIIc-IIIc. (A) is the lower wire mesh reinforcement and dowel reinforcement reinforcement at the time of manufacturing the precast wall member according to the second embodiment of the present invention, placing and step of the first layer (outer wall portion), and (b) is. A cross-sectional view showing a step of placing a partition frame, (c) a step of filling a second layer (filled heat insulating material), and (d) a step of placing a third layer (side surface of a wall). (A) is a bottom sectional view of a precast wall member (finished product) according to a modified example of the present invention, (b) is a bottom sectional view according to another modified example, and (c) and (d) are still other. The bottom cross-sectional view which concerns on the modification of.

The precast wall member and the method for manufacturing the precast wall member of the present invention will be described below with reference to the accompanying drawings. The same components are designated by the same reference numerals, and the description thereof will be omitted. In the following description, the plane, top surface, side surface, bottom surface, etc. are described with reference to the horizontal posture at the time of manufacturing the precast wall member, and if it is different from the set standard state, that fact is described.

[First Embodiment]
1 (a) to 1 (c) show the precast wall member 1 according to the first embodiment of the present invention. The precast wall member 1 is a partition frame body 10 precast concrete slab product in which a predetermined range of the member is filled with a filling heat insulating material 11 using the partition frame body 10, and is used as an outer wall curtain wall of a building. Is.

(Component of precast wall member 1)

The wall surface materials 12 and 13 that are separated by the two castings cover the periphery of the partition frame body 10 and the filling heat insulating material 11 to form the outer shape of the precast wall member 1. In the present embodiment, the wall surface materials 12 and 13 are made of lightweight mortar having a specific gravity of about 1.0, are heavier than the ALC member, and are set to have high strength. The wall surface material 12 has a bottom surface (outer wall portion) of the precast wall member 1 formed with a thickness of about 60 mm, and the wall surface material 13 has a peripheral wall (wall side surface portion) and an upper surface (inner wall portion) of the precast wall member 1, respectively. It is formed with a thickness of about 100 mm and about 60 mm.

As shown in FIGS. 1 (a) to 1 (c), the partition frame body 10 is a frame body joined in a □ shape when viewed from the front so as to surround four circumferences of the filling heat insulating material inside. The partition frame body 10 is composed of two sets of frame bodies having different sizes that function as buried molds, which are placed on the wall surface material 12 that has already been cast at the time of manufacturing the precast wall member 1. The internal space partitioned by the partition frame body 10 is filled with the filled heat insulating material 11 in an unsolidified state having fluidity. In the present embodiment, in the partition frame body 10, rod-shaped members of polystyrene foam such as styrofoam (registered trademark) having a rectangular cross section of 50 mm × 80 mm form two sets of compartments (FIG. 1 (a)) having different sizes. As such, it is assembled to form a frame.

The filled heat insulating material 11 plays a role of enhancing the heat insulating effect of the precast wall member 1, and is filled and solidified in the compartment as a layer having a thickness of about 80 mm partitioned by the partition frame body 10 and the wall surface materials 12 and 13. In the present embodiment, the filled heat insulating material 11 uses a bubble mortar having a specific gravity of about 0.5.

The mesh bar 14 is a reinforcing bar arranged on the bottom surface side of the precast wall member 1, and the mesh bar 15 is a reinforcing bar arranged on the upper surface side of the precast wall member 1. As the mesh bars 14 and 15, wire mesh having a reinforcing bar diameter of φ6 and a mesh size of 150 mm × 150 mm, which are arranged in the wall surface materials 12 and 13, is used.

The dowel bar 16 is a substantially U-shaped auxiliary reinforcing bar arranged in the thickness direction of the precast wall member 1 in order to keep the distance between the mesh bar 14 and the mesh bar 15 constant. The dowel muscle 16 also bears a shearing force in the horizontal direction due to the dowel effect.

The fastener driving hardware 17 and 18 are mounting hardware for the precast wall member provided on the upper side and the lower side of the precast wall member 1 on the indoor side of the building in order to mount the precast wall member 1 on the building.

The positioning bar 19 is a substantially L-shaped reinforcing bar that abuts the partition frame body 10 on the wall surface material 12 at a predetermined position by contacting the partition frame body 10 from the outside of the side surface of the precast wall member 1.

(Structure of precast wall member 1)
The bottom surface (at the time of manufacture) of the precast wall member 1 is composed of a wall surface material 12 as an outer wall portion, and a partition frame body 10 functioning as an embedded formwork is arranged on the wall surface material 12 and partitioned by the partition frame body 10. A filled heat insulating material 11 that is filled and solidified in the internal space is located. The side surface and the upper surface of the partition frame body 10 and the upper surface of the filling heat insulating material 11 are covered with the wall surface material 13 as an inner wall portion. The mesh reinforcement 14 is arranged on the wall surface material 12, the mesh reinforcement 15 is arranged on the wall surface material 13, and the mesh reinforcement 14 and the mesh reinforcement 15 are joined by the dowel reinforcement 16.

(Manufacturing method of precast wall member 1)
Hereinafter, a method for manufacturing the precast wall member 1 will be described with reference to FIGS. 2 (a) to 2 (d).

First, as shown in FIG. 2A, a rectangular outer peripheral form 21 in a plan view is placed on the bed 20, and mesh streaks 14, dowel streaks 16 and positioning streaks 19 are predetermined inside the outer peripheral form 21. Secure the cover thickness and arrange the reinforcement. After the reinforcement is arranged, the wall surface material 12 of the first layer is cast with a predetermined thickness, and the partition frame body 10 is brought into contact with the positioning bar 19 so as to partition the predetermined internal space of the partition frame body on the wall surface material 12. By allowing the outer peripheral mold 21 to be placed, a predetermined distance is secured from the outer peripheral mold 21. Since the partition frame body 10 is lightweight, it can be placed at a predetermined position of the partition frame body 10 wall material 12 before the wall surface material 12 is cured, and the partition frame body 10 can be adhered and fixed to the wall surface material 12.

Next, as shown in FIG. 2B, the second layer (filled heat insulating material 11) is filled up to the top end of the partition frame body 10 as the buried form. After that, as shown in FIG. 2C, the mesh streaks are connected to the upper end (top end) of the dowel streaks 16 in the outer peripheral form 21 and arranged. Finally, as shown in FIG. 2D, there is a third position between the outer peripheral form 21 and the partition frame 10 and from the upper side of the filled heat insulating material 11 having sufficient strength to the top end of the outer peripheral form 21. The wall surface material 13 of the layer (inner wall portion) is placed. After the wall material 13 is cured, the precast wall member 1 is removed from the outer peripheral form 21 to complete the production of the precast wall member 1.

According to the present embodiment, after the partition frame body 10 is placed on the wall surface material 12, the filled heat insulating material 11 is filled in the range surrounded by the partition frame body 10, and the upper surface of the filled heat insulating material 11 and the partition frame body 10 are filled. Since the wall surface material 13 can be cast in the outer peripheral range to manufacture the precast wall member 1, the precast wall member 1 can be easily manufactured as compared with the case where a floating formwork is used. Further, since the partition frame body 10 can be placed before the wall surface material 12 is cured and the partition frame body 10 is left in the precast wall member 1, the manufacturing time of the precast wall member 1 can be shortened.

[Second Embodiment]
3 (a) to 3 (c) show the precast wall member 2 according to the second embodiment of the present invention. The precast wall member 2 is a precast wall member that uses a partition frame body 10A to fill the filling heat insulating material 11 on the surface constituting the outer wall portion.

(Component of precast wall member 2)
As shown in FIGS. 3A to 3C, the partition frame body 10A has a height of about 100 mm in the present embodiment, and the top end of the partition frame body 10A is exposed.

The wall surface material 13A is cast between the outer peripheral formwork 21A and the partition frame body 10A to the top of the outer peripheral formwork 21A at a height of about 100 mm to form the side surface of the precast wall member 2.

The mesh bars 15A and 15B are wire mesh bars, and are arranged at the upper ends of the dowel bars 16 in the filled heat insulating material 11 and in the wall surface material 13A, respectively.

(Structure of precast wall member 2)
The bottom surface (outer wall portion) of the precast wall member 2 is composed of the wall surface material 12, the partition frame body 10A is placed on the wall surface material 12, and the precast wall member 2 is filled and solidified within the range partitioned by the partition frame body 10A. The material 11 is provided. The outer surface of the partition frame body 10A is covered with a wall surface material 13A which is a wall side portion. The upper surface (inner wall side) of the partition frame body 10A and the upper surface of the filling heat insulating material 11 are exposed to the outside.

(Manufacturing method of precast wall member 2)
Hereinafter, a method of manufacturing the precast wall member 2 will be described with reference to FIGS. 4 (a) to 4 (d). First, as shown in FIG. 4A, a rectangular outer peripheral form 21A in a plan view is placed on the bed 20, and mesh streaks 14, dowel streaks 16 and positioning streaks 19 are predetermined inside the outer peripheral form 21A. Reinforce the reinforcement so that the cover thickness can be secured. After arranging the reinforcing bars, the wall surface material 12 to be the outer wall portion is cast with a predetermined thickness. Next, as shown in FIG. 4B, the partition frame body 10A is brought into contact with the positioning bar 19 on the wall surface material 12 to secure a predetermined distance from the outer peripheral form 21A and form a square shape in a plan view. Place it. As shown in FIG. 4C, the mesh reinforcement 15A is connected to the upper end of the dowel reinforcement 16 in the outer peripheral formwork 21A to arrange the reinforcement. After the reinforcement is arranged, the partition frame body 10A is filled with the filling heat insulating material 11 up to the top end of the partition frame body 10A. Finally, as shown in FIG. 4D, a wall surface material 13A to be a wall side surface portion is placed between the outer peripheral formwork 21A and the partition frame body 10A up to the top end of the outer peripheral formwork 21A. After the wall material 13A is cured, the precast wall member 2 is removed from the outer peripheral form 21A to complete the production of the precast wall member 2.

According to the present embodiment, after the partition frame body 10A is placed on the wall surface material 12, the area surrounded by the partition frame body 10A is filled with the filling heat insulating material 11 and solidified, and the wall surface material 13A is cast to form a precast wall. Since the member 2 can be manufactured, the precast wall member 2 can be easily manufactured as compared with the case where a floating formwork is used. Further, since the wall surface material 13A is cast between the partition frame body 10A and the outer peripheral form 21A to manufacture the precast wall member 2, the precast wall member 13 is also cast on the upper surface of the filling heat insulating material 11. The production time can be shortened as compared with the production of 1.

[Modification example]
In each of the above embodiments, the cross-sectional shapes of the partition frame bodies 10 and 10A are rectangular, but due to structural reasons and manufacturing reasons of the precast wall member, FIGS. 5 (a) and 5 (b) are shown. As shown, the precast wall members 3 and 4 may be manufactured by using the partition frame bodies 10a, 10b and the like having a trapezoidal cross section. Further, in order to firmly fix the partition frame body to the wall surface material 12, partition frame bodies 10c, 10d, 10e and the like having a concave-convex cross section at the bottom as shown in FIGS. 5 (c) and 5 (d) are used. The precast wall members 5 and 6 may be manufactured. Further, the arrangement of the joined buried formwork in a plan view may be a single or three or more sets of rectangular shapes instead of two sets of rectangular shapes, or the shape of the joined buried formwork in a plan view. May be trapezoidal or the like instead of rectangular.

Further, in each of the above embodiments, mesh reinforcing fibers are arranged in the wall surface materials 12, 13, and 13A, but instead of the mesh reinforcing fibers, reinforcing fibers such as alkali-resistant glass fibers are mixed with the mortar to form fibers. It may be used as a reinforcing mortar, or may be used as a reinforcing material by using a mesh streak and a reinforcing fiber in combination.

In each of the above embodiments, only the partition frame body 10 is a stationary formwork, but the outer peripheral formwork 21 and 21A may also be a stationary formwork. Further, in each of the above embodiments, the partition frame body 10 is polystyrene foam, but a foamed inorganic mortar mold, a wooden mold, a water-resistant paper mold, or the like may be used.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope shown in each claim. That is, an embodiment obtained by combining technical means appropriately modified within the scope of the claims is also included in the technical scope of the present invention.

1,2,3,4,5,6 Precast concrete wall members 10, 10A, 10a, 10b, 10c, 10d Partition formwork 11 Filled insulation materials 12, 13, 13A Wall materials 14, 15, 15A, 15B Mesh bars 16 Dowel bars 17, 18 Fastener driving hardware 19 Positioning bars 20 Beds 21 and 21A Outer formwork

Claims (6)

A wall material composed of an outer wall portion and a wall side surface portion having a predetermined thickness,
A partition frame body located in the wall surface member surrounded by the outer wall portion and the wall side surface portion, and
Filled heat insulating material filled in the area surrounded by the partition frame body,
A precast concrete wall member characterized by consisting of. A wall material composed of an outer wall portion, an inner wall portion, and a wall side surface portion having a predetermined thickness,
A partition frame body located in the wall surface member surrounded by the outer wall portion, the inner wall portion, and the wall side surface portion, and
Filled heat insulating material filled in the area surrounded by the partition frame body,
A precast concrete wall member characterized by consisting of. The outer wall portion of the wall surface material is placed on the bed and in the outer peripheral formwork installed on the bed, and the partition frame body is placed on the outer wall portion of the outer wall surface material at intervals from the outer peripheral formwork.
The inside of the partition frame is filled with a filling heat insulating material.
A method for manufacturing a precast concrete wall member, which comprises placing a wall side surface portion of a wall material between the partition frame body and the outer peripheral formwork. The method for manufacturing a precast concrete wall member according to claim 3, wherein the wall surface material is further provided with the filled heat insulating material and an inner wall portion covering the upper surface of the wall side surface portion. The precast concrete wall member according to claim 1 or 2, wherein the filled heat insulating material is made of foamed mortar. The precast concrete wall member according to claim 1 or 2, wherein the partition member is an assembled polystyrene foam molded product.

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