JPS6220565Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention relates to a wall structure constructed by attaching a weather-resistant surface plate to a concrete plate mixed with steel fiber. In recent years, lightweight, inexpensive, weather-resistant, fire-resistant,
There is an increasing demand for walls with excellent sound insulation properties and ease of construction. However, these walls, such as those made of RC structure or normal PC structure, are heavy and not lightweight, and cannot be retrofitted. Therefore, by making the wall made of steel fiber concrete, the thickness of the wall could be made thinner and lighter, and in order to improve weather resistance, a wall structure was devised using a post-installation method in which a weather-resistant surface plate was attached to form a plate. It was done, but
None of these wall structures were provided with secure and easy attachment means. This idea was made in view of these circumstances,
The object is to provide a wall structure that can be easily and reliably installed. This invention will be explained below with reference to an illustrative example. In Figs. 1 and 2, a concrete board (hereinafter referred to as SFRC board) in which steel fibers are mixed between a beam 1 and a floor slab 2 which face each other vertically is shown. )
3 are built in series. This SFRC
A weather-resistant surface material 4 made of asbestos slate is adhered to the outdoor surface of the board 3 (left side in FIG. 1, upper side in FIG. 2). Further, anchors 6 bent into an L shape are buried in the upper and lower ends of the SFRC board 3, and one bent half of the anchor 6 has its tip bulged, and a screw hole 5 is provided in the enlarged part. The screw hole 5 of the anchor 6 is SFRC.
so that the upper and lower parts of the board 3 open toward the indoor side,
The other bent half of the anchor 6 is located approximately in the center of the plate in the thickness direction and is buried so as to face the center in the vertical direction. On the other hand, embedded bolts 7 are embedded in the beam 1 and floor slab 2 facing the opening, and their tips protrude into the beam and floor slab surfaces. SFRC board 3 installed between beam 1 and floor slab 2
An L-shaped steel 8 is arranged at the even corner part, the tip of the embedded bolt 7 passing through this is fastened with a nut 9, and a bolt 10 passing through the L-shaped steel 8 and screwed into the screw hole 5 is attached.
is fixed by fastening the end with a cap nut 11. In addition, beam 1, floor slab 2, wall surface 12 and SFRC
Backup material 13 and sealing material 14 are fitted in the gap between the plate 3 and the end surface to maintain airtightness. In the SFRC board used in this invention, it is preferable to mix steel fiber as a reinforcing material and use inorganic hollow spheres such as pearlite as an aggregate. Steel fibers have cross-sectional shapes of 0.1 to 0.5 mm, such as circular, semicircular, and rectangular, and lengths of 15 to 15 mm.
A 40 mm one is used, and the mixing rate is 0.2 to 6.0% by volume, preferably 0.3 to 2.0%. When pearlite is used as aggregate, its mixing ratio is in the range of 1:1 to 1:1.6 (cement:perlite volume ratio), and the AE
It is preferable to mix about 0.04% of the agent into the cement. The SFRC board manufactured in this way has a lower specific gravity and lighter weight than conventional concrete boards, can be nailed, has excellent workability, and has high fire resistance. Furthermore, if the reinforcement reinforcing bars are buried, the strength can be further improved. As the weather-resistant surface plate, in addition to the asbestos slate plate used in the examples, a plate with high weather resistance and fire resistance, such as a calcium silicate plate, is used. An example of the composition of the SFRC board is shown in Table 1.

[Table] Table 2 shows the ratio of mechanical properties when steel fiber is mixed in and when it is not.

[Table] As shown in the table above, compared to plain concrete, SFRC has approximately three times the tensile strength and bending strength, and although the compressive strength does not particularly improve, the compressive elastic modulus is 40% higher, and the bending toughness is 40% higher. Significantly improved. If necessary, plasterboard, plywood, cloth, etc. may be attached to the indoor surface of the SFRC board, or finishing may be done by painting, etc. As mentioned above, the wall structure of this invention is made of SFRC boards with a weather-resistant surface plate attached to the outdoor surface and anchors with screw holes embedded, resulting in the following effects. (1) SFRC boards are extremely superior to plain concrete in terms of various mechanical properties, and are excellent in fire resistance, sound insulation, and light weight. As a result, the mechanical properties, weather resistance, fire resistance, and sound insulation properties of each element can be fully exhibited. (2) Since the L-shaped anchors are buried and used as mounting brackets, the connection between the SFRC plate and the metal fittings is strong, and the surface plate of the steel fiber concrete plate has a bolt head for attaching the SFRC plate. It is possible to prevent it from appearing on the surface, and the plate body can be easily installed and fixed with a bolt passed through a hole in a metal fitting fixed to a beam or slab. If extremely high sound insulation is required, SFRC boards or other walls may be built on the indoor side at appropriate intervals to create a double wall, and if necessary, glass wool, etc. may be filled in between to form a wall. This goal can be achieved.

[Brief explanation of the drawing]

The drawings show the wall structure of the embodiment, with FIG. 1 being a longitudinal cross-sectional view and FIG. 2 being a cross-sectional view. 1...beam, 2...floor slab, 3...SFRC board,
4... Weather-resistant surface material, 5... Screw hole, 6... Anchor, 7... Embedded bolt, 8... L-shaped steel, 9...
Natsutto, 10...Boruto, 11...Fukuro Nats, 1
2... Wall surface, 13... Backup material, 14...
Sealing material.

Claims (1)

[Scope of utility model registration request] The wall is made of a steel fiber concrete plate in which an anchor bent in an L shape is buried and a weather-resistant surface plate is attached to the wall, and one bent half of the anchor has its tip bulged and a screw hole is formed. Screw holes are provided in the upper and lower parts of the board to open toward the indoor side, and the other bent half is buried in approximately the center of the board in the thickness direction so as to face the center in the vertical direction, and fixed to the beam and floor slab. A wall structure characterized in that the wall body is attached to a beam and a floor slab by screwing a bolt passed through a through hole of a metal fitting into the screw hole.