Rammed earth blocks

Abstract

To provide rammed earth blocks that reduce the likelihood of collapse during construction, for example, when constructing a rammed earth wall.SOLUTION: The cubic rammed earth blocks are made by compacting soil-based materials within formwork. Reinforcing materials are distributed inside the rammed earth blocks.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a block for block construction that can be manufactured using block construction, a well-known construction method in the past, and can be used for a block construction wall that can construct a high earth wall and has high workability, and can reuse earth materials.

Background Art

[0002] It has been widely known to construct earth walls etc. by block construction, and it is often seen in earth walls of temples and shrines etc. This construction method involves putting earth into a formwork and compacting it layer by layer at appropriate heights, and repeating this process several times for construction. However, when creating a wall by block construction, if the wall thickness is thin, it will become a fragile wall body, so a certain wall thickness is required, resulting in problems such as an increase in the total weight and difficulty in stacking high due to the structural instability of compacting the earth. Currently, block construction is rarely adopted.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Patent Document 1 describes a non-cement-based solidifying material that does not contain cement, and an earth structure using this is described. However, in the invention described in Patent Document 1, a non-cement-based solidifying material is mixed with earth to form blocks, and the blocks themselves are not manufactured by the block construction method.

[0005] In the present invention, the blocks themselves are formed by block construction ,example for example, when constructing a block construction wall edge, it is likely to collapse easily during construction It can be reducedThe purpose is to provide rammed earth blocks. [Means for solving the problem]

[0006] To achieve the above objective, the present invention provides a rammed earth block formed by compacting a soil-based material within a formwork, comprising a reinforcing member disposed inside the rammed earth block and extending along the longitudinal direction of the rammed earth block. The plurality of reinforcing members include a pair of reinforcing members arranged apart in the width direction of the rammed earth block, and a pair of reinforcing members arranged apart in the thickness direction of the rammed earth block relative to the pair of reinforcing members. This arrangement of reinforcing materials makes it possible to counteract bending and tensile stresses on the materials that make up the rammed earth blocks.

[0007] The reinforcing material may be formed from rough rope.

[0008] The reinforcing material may be formed from natural materials. In this case, not only the material of the rammed earth block but all of its components are made from natural materials, which is preferable from an environmental and hygienic standpoint.

[0009] The system may include a pair of the aforementioned reinforcing members, and the pair of reinforcing members may be arranged apart in the width direction of the rammed earth block. [Effects of the Invention]

[0011] Since the present invention has the above-described configuration, It can withstand bending and tensile stresses on the materials that make up the rammed earth blocks. [Brief explanation of the drawing]

[0012] [Figure 1] Perspective view showing an example of the rammed earth block of the present invention. [Figure 2] Front view of a rammed earth wall constructed using the rammed earth blocks of the present invention. [Figure 3] The same, a front view showing the framework structure for stacking rammed earth blocks. [Figure 4] Cross-sectional view showing the relationship between rammed earth blocks and core material. [Modes for carrying out the invention]

[0013] Preferred embodiments of the present invention will be described below with reference to the drawings. Figure 1 is a perspective view showing a rammed earth block 1 of the present invention, which has an overall rectangular parallelepiped shape with recesses 2,2 formed on both short sides. This rammed earth block 1 is manufactured by pouring soil into a formwork (not shown) and compacting it. Therefore, the overall shape is not limited to this embodiment and can be appropriately selected according to the shape of the formwork, such as a cube or a trapezoidal cross-section. 3 is a reinforcing material arranged along the longitudinal direction inside the cross-section, and is intended to resist bending stress, tensile stress, etc. The material of the reinforcing material is not particularly limited in terms of its function, but if the rammed earth block 1 of this embodiment is made of a material that can be crushed and returned to the soil when it is discarded after its use, it is preferable to use a similar natural material such as rough rope.

[0014] As an example, the material for rammed earth block 1, excluding the reinforcing material 3, is a mixture of fine aggregate sand for concrete and soil from the site where the rammed earth construction will be carried out, mixed with a magnesium-based solidifying agent, and then supplemented with tap water, groundwater, industrial water, or river water. As an example, the mixing ratio is 10-15 parts binder, 30 parts sand, 100 parts soil collected from the site, and 20-35 parts water, and these are mixed to create the material for rammed earth block 1. Note that the amounts of binder, sand, and soil are for the dry state. There are no particular limitations on the particle size of the soil, but preferably it is 15 mm or less and contains 15% or more clay. The ratio of soil to sand is set at 100:30 to ensure the use of soil collected from the site and to match the local environment. This ratio is also chosen to adjust the particle size to be appropriate for soil solidification and to enhance dimensional stability (prevent deformation due to drying) associated with soil solidification. These materials will be treated as industrial waste, but after their intended use, they can be crushed and reused. The rough rope used as reinforcing material can also be treated as regular waste. Therefore, the amount of industrial waste generated can be reduced.

[0015] The reason for allowing a range in the binder and water ratio is to accommodate differences in soil particle size, moisture content, and soil composition in the local soil, and the ratio should be determined appropriately according to the properties of the local soil. Within this range, by adjusting the ratio and amount of water and binder according to the soil's moisture content, the soil can be solidified regardless of the soil type.

[0016] Next, the procedure for manufacturing the rammed earth block is as follows: The materials to be used are mixed in an electric mixer until uniform. This mixture is poured into the mold up to the first layer 1a in Figure 1, and compacted with a hammer or similar tool to form the shape. Then, reinforcing material 3 such as rough rope is placed on top of the first layer, and then the material for the second layer 1b is poured in and compacted in the same way, with reinforcing material 3 placed on top of that as well. Subsequently, the material for the third layer 1c is poured in and compacted in the same way to shape the overall form, and then allowed to solidify. Compaction can be done manually or using an electric hammer drill. After compaction is complete and approximately one hour has passed, once the whole thing has stabilized, it is released from the mold and allowed to dry. Drying can be done naturally or with air blown in a heated atmosphere, but it is preferable to allow an appropriate amount of time in the drying process to allow the inside to dry to a certain extent. In this embodiment, the rammed earth block is manufactured in three stages, with reinforcing material 3 installed between the first stage 1a and the second stage 1b, and between the second stage 1b and the third stage 1c. However, if the adhesion between the rough rope used as reinforcing material 3 and the material can be ensured, and the block as a whole can be sufficiently compacted, it is also possible to place the rough rope in the intermediate stages while adding the material, and compact the entire block in the final stage.

[0017] In an example of a rammed earth wall using the rammed earth blocks of this embodiment, Figure 2 is a front view showing the state in which the rammed earth blocks 1 are stacked, and the rammed earth wall 4 is created by stacking the rammed earth blocks 1 with through joints (butt joints). 5-5 are frame bodies provided on both sides. The figure shows the state in which 19 layers of rammed earth blocks 1 are stacked. In this embodiment, the rammed earth blocks 1 are not simply stacked, but a framework structure is adopted to prevent collapse in the stacked state. Figure 3 is a front view showing an example of the framework structure, in which multiple core materials 6 are erected at equal intervals between the frame bodies 5-5. The specific configuration of the core materials 6 does not need to be particularly limited, and the purpose is to prevent collapse when the rammed earth blocks 1 are stacked. However, as the core material 6 adopted in this embodiment, a configuration in which the web portions of U-shaped metal plates 7 are integrated into a pair, back to back, as shown in Figure 4, is preferable. The metal plates 7 can be obtained by drawing aluminum or the like. The material of the metal plates 7 is not limited to aluminum, but may also be channel-shaped steel plates. The requirements for the metal plate 7 are to facilitate the lamination of the rammed earth blocks 1 by forming a framework structure, and to prevent collapse. Any material that satisfies these requirements is acceptable. However, a material with good adhesion to mortar is preferred.

[0018] Next, the procedure for constructing the rammed earth wall 4 will be explained. First, as shown in Figure 3, core materials 6 are erected at equal intervals between the frame bodies 5, 5. Only one metal plate 7 is erected on each side of the core material 6, and two metal plates 7 are erected back-to-back in the middle section, as illustrated in Figure 4. Next, rammed earth blocks 1 are placed in a row so as to be inserted between the core materials 6, and stacked, for example, in units of three layers. Then, as shown in Figure 4, mortar 8 is filled into the spaces formed by the recesses 3, 3 of adjacent rammed earth blocks 1, 1. The mortar 8 serves to securely position the rammed earth blocks 1 relative to the core materials 6. Furthermore, rammed earth blocks 1 are stacked on top of that using the same process, and mortar 8 is filled to raise the rammed earth wall 4 to the planned height. Note that the rammed earth blocks 1 are stacked based on the core materials 6 and are installed relative to the core materials 6 via mortar 8, so they are stable, and there is no particular need to fix the upper and lower rammed earth blocks with joint material.

[0019] One embodiment of the rammed earth block described above is a cubic rammed earth block made by compacting a soil-based material in a formwork. The material consists of 10 to 15 parts by mass of binder, 30 parts by mass of sand, 100 parts by mass of soil, and 20 to 35 parts by mass of water. All of the materials used are basically natural materials and are easily recycled. In addition, since a magnesium-based solidifying agent is used as the binder, it is relatively easy to procure.

[0020] The soil must have a particle size of 15 mm or less and may be soil collected from the local soil where the rammed earth blocks are to be installed. Therefore, locally sourced materials from all over Japan can be used as materials at the construction site, making it environmentally friendly and allowing for construction that blends in with the local landscape.

[0021] Reinforcement materials may be placed along the longitudinal direction inside the rammed earth block. This arrangement of reinforcement materials can resist bending and tensile stresses on the material constituting the rammed earth block. When using rough rope as reinforcement, not only the material of the rammed earth block but all of its components are made of natural materials, which is preferable from an environmental and hygienic standpoint.

[0022] These rammed earth blocks possess excellent moisture-wicking, heat-insulating, and deodorizing properties. When used indoors, they improve the air quality and provide a comfortable space. Furthermore, their high heat insulation properties reduce electricity consumption during air conditioning, contributing to energy conservation and a low-carbon society.

Explanation of Symbols

[0023] 1 Formed Block 2 Concave Portion 3 Reinforcing Material 4 Formed Wall 6 Core Material 7 Metal Plate 8 Mortar

Claims

1. A rammed earth block is formed by compacting a material primarily composed of soil within a formwork. The rammed earth block is provided with a plurality of reinforcing members arranged inside the rammed earth block and along the longitudinal direction of the rammed earth block, The plurality of reinforcing members include a pair of reinforcing members arranged apart in the width direction of the rammed earth block, and a pair of reinforcing members arranged apart in the thickness direction of the rammed earth block relative to the pair of reinforcing members, Rammed earth blocks.

2. The rammed earth block according to claim 1, wherein the reinforcing material is formed from rough rope.

3. The rammed earth block according to claim 2, wherein the reinforcing material is formed from natural materials.

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