JP2023013907A - Concrete block and concrete block wall body using the same - Google Patents

Abstract

To provide a concrete block facilitating management of concrete blocks when a concrete block with a foam resin block, and a concrete block without the foam resin block are used together.SOLUTION: A concrete block wall body has hollow parts 11 and 12 for filling a grout material, and a foam resin block 2 is attached from an opening 11a of the hollow part 11 of a concrete block 1 so as to occupy the hollow part 11 of the concrete block 1.SELECTED DRAWING: Figure 1

Description

The present invention relates to a concrete block and a concrete block wall using the same.

In recent years, concrete blocks are made up of masonry structures that are reinforced with grout materials such as mortar and concrete and reinforcing bars, and have the same earthquake resistance as reinforced concrete structures. Construction" (referred to as "RM (reinforced masonry) construction" in this specification) is attracting attention.

By the way, in RM construction, reinforcing bars are passed through the hollow part of the concrete block and grout material is filled (usually, instead of sequential filling, a floor height filling method is adopted in which filling is performed after masonry of all concrete blocks is completed.) For example, in the case of a cantilever built on a foundation like a block wall, the structure fully filled with grout material during an earthquake has a large mass, Inertial force due to seismic motion increased, and in order to prevent collapse, it was necessary to increase the size of the foundation accordingly.

On the other hand, in order to reduce the weight of concrete blocks, concrete blocks having foamed resin blocks arranged therein have been proposed (see Patent Documents 1 and 2).
Then, in order to arrange the foamed resin block in the concrete block, the foamed resin block is placed in the formwork and the concrete is poured into the concrete block during the production of the concrete block, thereby manufacturing the concrete block containing the foamed resin block. I have to.
However, this method of manufacturing a concrete block requires time and effort to manufacture the concrete block, and when a concrete block provided with a foamed resin block and a concrete block not provided with a foamed resin block are used together, management of the concrete blocks is complicated. There was a problem of becoming

JP 2008-25152 A Japanese Utility Model Laid-Open No. 61-166006

In view of the above problems of the RM structure and the problems of concrete blocks containing foamed resin blocks, the present invention provides a case where concrete blocks provided with foamed resin blocks and concrete blocks without foamed resin blocks are used together. Another object of the present invention is to provide a concrete block and a concrete block wall using the concrete block which can be easily managed.

In order to achieve the above objects, the concrete block of the present invention is a concrete block having a hollow portion for filling with a grout material, wherein the foamed resin block is concreted so as to occupy a part of the hollow portion of the concrete block. It is characterized in that it is mounted through an opening in the hollow part of the block.

In this case, the foamed resin block is mounted so as to be flush with the bottom surface of the concrete block. It can be formed so as to be higher than the upper surface of the web of blocks.

Further, the foamed resin block can be provided with a movement prevention portion.

The foamed resin block may be provided with a concave groove extending in the length direction and filled with a grout material on the lower surface.

Further, the concrete block wall of the present invention is a concrete block wall using the concrete blocks described above, and is characterized by having a sound transmission loss equivalent to Rr-55.

According to the concrete block of the present invention, since the foamed resin block is mounted from the opening of the hollow part of the concrete block so as to occupy a part of the hollow part of the concrete block, the concrete provided with the foamed resin block When a block and a concrete block not provided with a foamed resin block are used together, the concrete block can be easily managed.

In addition, the foamed resin block is mounted so as to be flush with the bottom surface of the concrete block. By forming it so that it is higher than the upper surface of the foamed resin block, the attachment state of the foamed resin block to the concrete block is stabilized, and a sufficient thickness of the grout material can be secured for the horizontal reinforcement. .

In addition, since the foamed resin block is provided with a movement prevention portion, the foamed resin block may be lifted when grouting material is placed in the hollow portion of the concrete block other than the portion where the foamed resin block is attached. It is possible to prevent the foamed resin block from sinking when the horizontal reinforcement is placed on the foamed resin block, and to stabilize the mounting state of the foamed resin block to the concrete block.

In addition, by providing the foamed resin block with grooves extending in the longitudinal direction and filled with the grout material on the lower surface, it is possible to prevent water from entering and flowing into the interface between the foamed resin block and the grout material. It is possible to prevent deterioration of the durability of the RM structure.

Further, since the concrete block wall of the present invention has a sound transmission loss equivalent to Rr-55, it can be said that the wall structure has excellent sound insulation performance.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external perspective view which shows one Example of the concrete block of this invention. The same concrete block is shown, (a) is a front longitudinal cross-sectional view, (b) is a bottom view, (c) is a side view. The foamed resin block used for the concrete block is shown, (a) is a plan view, (b) is a front view, (c) is a bottom view, (d) is a side view, and (e) is an external perspective view. 1 shows a modified embodiment of the concrete block of the present invention, wherein (a) is a plan view, (b) is a front view, and (c) is a side view. The foamed resin block used for the same concrete block is shown, (a) is a front view, (b) is a side view, (c) is an external perspective view seen from above, and (d) is an external perspective view seen from below. . 1 shows a concrete block wall using the concrete block of the present invention, (a) is a front view, (b) is a cross-sectional view along AA in (a), and (c) is a cross-sectional view along BB in (a). be. It is a graph which shows the same test result.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of concrete blocks and concrete block walls using the concrete blocks of the present invention will be described below with reference to the drawings.

1 to 3 show one embodiment of the concrete block of the present invention.
This concrete block 1 is used for RM construction, and has hollow portions 11 and 12 for filling grout material. The foamed resin block 2 is mounted from the opening 11a of the hollow portion 11 of the concrete block 1 so as to occupy the central hollow portion 11 of the block 1.
Here, the notation of the vertical direction of the concrete block 1 and the foamed resin block 2 means that a structure (RM structure) is formed by inserting reinforcing bars (vertical bars, not shown) through the hollow portion 12 of the concrete block 1 and filling the grout material. Refers to the vertical direction when constructing a .

The foamed resin block 2 is made of any foamed resin such as polystyrene foam, and consists of a molded member that occupies the central hollow portion 11 of the concrete block 1 .

The foamed resin block 2 is mounted so that its bottom surface is flush with the bottom surface of the concrete block 1, and on the top surface of the foamed resin block 2, the horizontal-bar supporting spacers 21 are attached to the horizontal-bar supporting spacers 21. The supporting surface 21a is formed so as to be higher than the upper surface 13a of the web 13 of the concrete block 1. As shown in FIG.
As a result, the mounting state of the foamed resin block 2 to the concrete block 1 is stabilized, and a sufficient thickness of the grout material covering the lateral reinforcement (not shown) can be ensured.
Here, it is desirable to secure a sufficient covering thickness of the grout material of 20 mm or more, preferably 30 mm or more. The height is 22 mm, and the lateral reinforcement support surface 21a is positioned higher than the upper surface 13a of the web 13 of the concrete block 1 by about 30 mm.
Further, the horizontal-bar supporting surface 21a of the horizontal-bar supporting spacer 21 may be provided with a recess (not shown) for placing the horizontal-bar in a fixed position.

Further, the foamed resin block 2 is provided with a contact portion 22 that contacts the lower surface of the web 13 as a movement prevention portion.
As a result, when the grout material is placed in the hollow portions of the concrete block 1 (in this embodiment, the hollow portions 12 on both sides of the concrete block 1) other than the locations where the foamed resin blocks 2 are mounted, the foamed resin blocks 2 is prevented from rising, and the mounted state of the foamed resin block 2 to the concrete block 1 is stabilized.

By the way, the form of the movement prevention portion of the foamed resin block 2 is not limited to the contact portion 22 that contacts the lower surface of the web 13 of the concrete block 1, and the modified concrete block of the present invention shown in FIGS. As in the example, the contact portion 23 may be configured to contact the lower surface of the face shell 14 and be supported by a joint material.
As a result, when the grout material is placed in the hollow portions of the concrete block (in this embodiment, the hollow portions 12 on both sides of the concrete block 1) other than where the foamed resin block 2 is mounted, the foamed resin block 2 is It is possible to prevent the foamed resin block 2 from floating up and sinking when horizontal stripes are placed on the foamed resin block 2, thereby stabilizing the attachment state of the foamed resin block 2 to the concrete block 1.例文帳に追加

Further, as shown in FIG. 5, the bottom surface of the foamed resin block 2 may be provided with a recessed groove 24 having a depth of several mm to 20 mm and extending in the longitudinal direction filled with the grout material.
As a result, it is possible to prevent water from entering and flowing into the interface between the foamed resin block 2 and the grout material, thereby preventing deterioration in the durability of the RM structure.

According to this concrete block, the foamed resin block 2 is mounted from the opening 11a of the hollow portion 11 of the concrete block 1 so as to occupy a part of the hollow portions 11 and 12 of the concrete block 1. When the concrete block 1 provided with the resin block 2 and the concrete block 1 not provided with the foamed resin block 2 are used together, the management of the concrete block 1 can be easily performed.
The RM structure constructed using the concrete blocks 1 provided with the foamed resin blocks 2 enjoys the advantages of the RM structure having high durability and strength. Even if the cantilever is built on top of the structure, it is possible to prevent collapse by reducing the inertial force due to seismic motion due to the smaller mass compared to the structure fully filled with grout material during an earthquake.

Next, the sound insulation performance of concrete block walls constructed using the concrete blocks of the present invention was measured by conducting the following tests.
The test was conducted using the concrete block wall shown in FIG. 6 constructed using the concrete blocks shown in FIGS.
The test results are shown in Table 1 and FIG.

From the test results shown in Table 1 and FIG. 7, a concrete block wall (whole wall volume: 0.21 m × 2 m × 2 m = 0.84 m ³ , volume of foamed resin blocks 2: 0.0036 m ³ × 50 pieces = 0.18 m ³ , ratio of volume of foamed resin blocks 2 to the volume of the entire wall: 0.18 m ³ ÷ 0.84 m ³ = 0.21) has excellent sound insulation performance (sound transmission loss (JIS A1419-1) equivalent to Rr-55 (grade 4) (26 cm thick reinforced concrete)). bottom.

As described above, the concrete block of the present invention and the concrete block wall body using the same have been described based on the examples, but the present invention is not limited to the construction described in the above examples, and the exterior of the RM structure. For example, it can be applied to a reinforced concrete block structure partially filled with grout material (Article 62 of the Enforcement Order of the Building Standards Law).

The concrete block and the concrete block wall body using the concrete block of the present invention facilitate management of the concrete blocks when the concrete blocks provided with the foamed resin blocks and the concrete blocks without the foamed resin blocks are used together. Since it can be used, it can be suitably used for RM construction and reinforced concrete block construction.

REFERENCE SIGNS LIST 1 concrete block 11 hollow portion 11a opening 12 hollow portion 13 web 14 face shell 2 foamed resin block 21 lateral-bar supporting spacer 22 contact portion (movement prevention portion)
23 contact part (movement prevention part)
24 concave groove

Claims (5)

A concrete block having a hollow portion for filling with a grout material, wherein a foamed resin block is mounted from an opening in the hollow portion of the concrete block so as to occupy a part of the hollow portion of the concrete block. A concrete block characterized by The foamed resin block is mounted so as to be flush with the bottom surface of the concrete block, and a horizontal-bar supporting spacer is provided on the top surface of the foamed resin block so that the horizontal-bar supporting surface of the horizontal-bar supporting spacer is located on the web of the concrete block. 2. The concrete block according to claim 1, wherein the concrete block is formed so as to be higher than the upper surface. 3. The concrete block according to claim 1, wherein said foamed resin block is provided with a movement preventing portion. 4. A concrete block according to claim 1, 2 or 3, characterized in that said foamed resin block has a longitudinally extending recessed groove filled with a grout material on the lower surface thereof. A concrete block wall using the concrete block according to claim 1, 2 or 3, characterized by having a sound transmission loss equivalent to Rr-55.

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