Concrete blocks and concrete block walls made from them

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

[Technical Field]

[0001] The present invention relates to a concrete block and a concrete block wall using the same. [Background technology]

[0002] In recent years, attention has been focused on "reinforced concrete masonry construction" (referred to in this specification as "RM (reinforced masonry) construction"), which is defined in Ministry of Land, Infrastructure, Transport and Tourism Notification No. 463 of 2003 and consists of concrete blocks reinforced with grout materials such as mortar or concrete and steel bars, and has earthquake resistance equivalent to that of reinforced concrete construction.

[0003] Incidentally, RM construction involves passing steel bars through the hollow parts of concrete blocks and filling them with grout (usually, a floor-height filling method is used, in which grout is filled after all the concrete blocks have been laid, rather than filling sequentially), to create a structure.However, when constructed as a "cantilever" structure on a foundation, like a block wall, for example, during an earthquake, the mass of a structure fully filled with grout is large, and the inertial force caused by seismic motion is therefore large, so in order to prevent collapse, the foundation needs to be made larger accordingly.

[0004] On the other hand, concrete blocks in which foamed resin blocks are arranged have been proposed in order to reduce the weight of concrete blocks (see Patent Documents 1 and 2). In order to place the foamed resin block in the concrete block, when manufacturing the concrete block, the foamed resin block is placed in a formwork and concrete is poured in to manufacture a concrete block with the foamed resin block embedded therein. However, this method of manufacturing concrete blocks requires a lot of work to manufacture the concrete blocks, and when concrete blocks with foamed resin blocks and concrete blocks without foamed resin blocks are used together, the management of the concrete blocks becomes complicated. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-25152 [Patent Document 2] Japanese Utility Model Application Publication No. 61-166006 Summary of the Invention [Problem to be solved by the invention]

[0006] In consideration of the above-mentioned problems with RM construction and the problems with concrete blocks containing foamed resin blocks, the present invention aims to provide a concrete block that allows easy management of the concrete blocks when concrete blocks with foamed resin blocks and concrete blocks without foamed resin blocks are used in combination, and a concrete block wall using the same. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the concrete block of the present invention is a concrete block having a hollow portion for filling with grout material, and is characterized in that a foamed resin block is attached through the opening of the hollow portion of the concrete block so as to occupy a part of the hollow portion of the concrete block.

[0008] In this case, the foamed resin block is flush with the bottom surface of the concrete block. The foamed resin block is attached so that the horizontal reinforcement support spacer is formed on the upper surface of the foamed resin block so that the horizontal reinforcement support surface of the horizontal reinforcement support spacer is positioned higher than the upper surface of the web of the concrete block.

[0009] The foamed resin block may also be provided with a movement prevention portion.

[0010] The foamed resin block may have a groove on its underside extending in the length direction and filled with grout material.

[0011] The concrete block wall of the present invention is a concrete block wall using the above concrete blocks, characterized in that it has a sound transmission loss equivalent to Rr-55. [Effects of the Invention]

[0012] According to the concrete block of the present invention, the foamed resin block is attached through the opening of the hollow portion of the concrete block so as to occupy a portion of the hollow portion of the concrete block. Therefore, when concrete blocks with foamed resin blocks and concrete blocks without foamed resin blocks are used together, the concrete blocks can be easily managed.

[0013] In addition, by attaching the foamed resin block so that it is flush with the underside of the concrete block and forming a horizontal reinforcement support spacer on the upper surface of the foamed resin block so that the horizontal reinforcement support surface of the horizontal reinforcement support spacer is higher than the upper surface of the web of the concrete block, the foamed resin block is attached stably to the concrete block and a sufficient covering thickness of grout material for the horizontal reinforcement can be ensured.

[0014] Furthermore, by providing the foamed resin block with a movement prevention portion, it is possible to prevent the foamed resin block from floating up when grout material is poured into the hollow portion of the concrete block other than the portion where the foamed resin block is attached, or from sinking when horizontal reinforcement is placed on the foamed resin block, thereby stabilizing the attachment state of the foamed resin block to the concrete block.

[0015] In addition, by providing the foamed resin block with a longitudinally extending groove on its underside into which grout material is filled, water is prevented from penetrating and flowing at the interface between the foamed resin block and the grout material, thereby preventing a decrease in the durability of the RM structure.

[0016] Furthermore, the concrete block wall of the present invention has a sound transmission loss equivalent to Rr-55, and therefore can be said to be a wall structure with excellent sound insulation performance. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a perspective view showing an external appearance of an embodiment of a concrete block of the present invention. [Figure 2] The concrete block is shown in (a) a vertical cross-sectional front view, (b) a bottom view, and (c) a side view. [Figure 3] 1 shows the foam resin block used in the concrete block, where (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. [Figure 4] 1A, 1B, and 1C show a modified embodiment of the concrete block of the present invention, in which (a) is a plan view, (b) is a front view, and (c) is a side view. [Figure 5] 1 shows the foamed resin block used in the concrete block, where (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. [Figure 6] 1A and 1B show a concrete block wall using the concrete blocks of the present invention, in which (a) is a front view, (b) is a cross-sectional view taken along line AA in (a), and (c) is a cross-sectional view taken along line BB in (a). [Figure 7] 2 is a graph showing the test results. DETAILED DESCRIPTION OF THE INVENTION

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the concrete block and the concrete block wall using the same of the present invention will be described with reference to the drawings.

[0019] 1 to 3 show an embodiment of the concrete block of the present invention. This concrete block 1 is used in RM construction and has hollow portions 11, 12 for filling with grout material, and a foamed resin block 2 is attached through an opening 11a of the hollow portion 11 of the concrete block 1 so as to occupy part of the hollow portions 11, 12 of the concrete block 1 (in this embodiment, the hollow portion 11 in the center of the concrete block 1). Here, the notation of the up and down directions of the concrete block 1 and the foam resin block 2 refers to the up and down directions when steel bars (vertical bars, not shown) are passed through the hollow portion 12 of the concrete block 1 and grout material is filled to construct a structure (RM structure).

[0020] The foamed resin block 2 is made of any foamed resin such as polystyrene foam, and is a molded member that occupies the central hollow portion 11 of the concrete block 1.

[0021] The foamed resin block 2 is attached so that its lower surface is flush with the lower surface of the concrete block 1, and a horizontal bar support spacer 21 is formed on the upper surface of the foamed resin block 2 so that the horizontal bar support surface 21a of this horizontal bar support spacer 21 is positioned higher than the upper surface 13a of the web 13 of the concrete block 1. This allows the foamed resin block 2 to be attached to the concrete block 1 in a stable manner, and also ensures that the grout material covers the horizontal reinforcement bars (not shown) to a sufficient thickness. Here, it is desirable to ensure a sufficient covering thickness of grout material of 20 mm or more, preferably 30 mm or more. In this embodiment, the height of the horizontal reinforcement support spacer 21 relative to the upper surface of the foamed resin block 2 is 22 mm, and the horizontal reinforcement support surface 21a is positioned approximately 30 mm higher than the upper surface 13a of the web 13 of the concrete block 1. Furthermore, the horizontal bar support surface 21a of the horizontal bar support spacer 21 may be provided with a recess (not shown) for placing the horizontal bar in a fixed position.

[0022] The foamed resin block 2 also has a contact portion 22 that contacts the lower surface of the web 13 as a movement prevention portion. This prevents the foamed resin block 2 from floating up when grout is poured into the hollow portions of the concrete block 1 other than the locations where the foamed resin block 2 is attached (in this embodiment, the hollow portions 12 on both sides of the concrete block 1), and stabilizes the attachment state of the foamed resin block 2 to the concrete block 1.

[0023] Incidentally, the form of the movement prevention portion of the foamed resin block 2 is not limited to the abutment portion 22 that abuts against the underside of the web 13 of the concrete block 1, but can also be an abutment portion 23 that abuts against the underside of the face shell 14 and is supported by a joint material, as in the modified embodiment of the concrete block of the present invention shown in Figures 4 and 5. As a result, the hollow portion of the concrete block other than the portion where the foamed resin block 2 is attached is This prevents the foamed resin block 2 from floating up when grout is poured into the hollow portions 12 on both sides of the concrete block 1, or from sinking when horizontal reinforcement is placed on the foamed resin block 2, thereby stabilizing the attachment state of the foamed resin block 2 to the concrete block 1.

[0024] 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, extending in the length direction in which the grout material is filled. This prevents water from penetrating and flowing at the interface between the foamed resin block 2 and the grout material, and prevents a decrease in the durability of the RM structure.

[0025] According to this concrete block, the foamed resin block 2 is attached through the opening 11a of the hollow portion 11 of the concrete block 1 so as to occupy a portion of the hollow portions 11, 12 of the concrete block 1. Therefore, when a concrete block 1 with a foamed resin block 2 and a concrete block 1 without a foamed resin block 2 are used together, the concrete block 1 can be easily managed. Furthermore, an RM structure constructed using concrete blocks 1 fitted with foam resin blocks 2 enjoys the advantages of RM construction, such as high durability and strength, and even when constructed as a cantilever on a foundation, like a block wall, its mass is smaller than that of a structure fully filled with grout during an earthquake, thereby reducing the inertial force caused by seismic motion and preventing collapse.

[0026] Next, the sound insulation performance of a concrete block wall constructed using the concrete block of the present invention was measured by carrying out the following test. The test was carried out using the concrete block wall shown in FIG. 6, which was constructed using the concrete blocks shown in FIGS. The test results are shown in Table 1 and FIG.

[0027] [Table 1]

[0028] From the test results shown in Table 1 and Figure 7, it can be seen that the concrete block wall (total wall volume: 0.21 m × 2 m × 2 m = 0.84 m) constructed using the concrete block of the present invention (a 21 cm thick concrete block 1 incorporating a foamed resin block 2) was 3 , foam resin block Volume of Q2: 0.0036m 3 ×50 pieces=0.18m 3 The ratio of the volume of the foamed resin block 2 to the volume of the entire wall: 0.18 m 3 ÷0.84m 3=0.21) has been confirmed to have excellent sound insulation performance (sound transmission loss (JIS A1419-1) equivalent to Rr-55 (class 4) (26 cm thick reinforced concrete)).

[0029] The concrete blocks of the present invention and concrete block walls using them have been described above based on examples, but the present invention is not limited to the configurations described in the above examples. The configuration can be modified as appropriate within the scope of the spirit of the invention, and can be applied not only to RM construction but also to reinforced concrete block construction in which grout material is partially filled (Article 62 of the Enforcement Order of the Building Standards Act). [Industrial Applicability]

[0030] The concrete blocks of the present invention and the concrete block walls using them can be easily managed when concrete blocks with foamed resin blocks and concrete blocks without foamed resin blocks are used in combination, and therefore can be suitably used for RM construction and reinforced concrete block construction. [Explanation of symbols]

[0031] 1 concrete block 11 Hollow part 11a opening 12 Hollow part 13. Web 14 Face Shell 2 foam resin blocks 21 Horizontal bar support spacer 22 Contact part (movement prevention part) 23 Contact part (movement prevention part) 24 Groove

Claims

1. A concrete block having a hollow portion for filling with grout material, and a foamed resin block attached to the hollow portion of the concrete block through an opening in the hollow portion so as to occupy a portion of the hollow portion, characterized in that the foamed resin block is attached so as to be flush with the bottom surface of the concrete block, and a horizontal reinforcement support spacer is formed on the top surface of the foamed resin block so that the horizontal reinforcement support surface of the horizontal reinforcement support spacer is positioned higher than the top surface of the web of the concrete block.

2. 2. The concrete block according to claim 1, wherein the foamed resin block is provided with a movement prevention portion.

3. 3. The concrete block according to claim 1, wherein the foamed resin block has a groove on the underside thereof extending in the length direction and into which grout material is filled.

4. A concrete block wall using the concrete blocks according to claim 1, 2 or 3, characterized in that the concrete block wall has a sound transmission loss equivalent to Rr-55.

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