Paving methods using wood chip paving materials

Abstract

This proposal proposes a paving method that uses wood chips to firmly bond the wood chips with the surrounding soil aggregate, making it less likely for the wood chips to peel or crack after paving. [Solution] This is a paving method for wood chip paving material, characterized by preparing wood chips, a magnesium-based solidifying agent, and aggregate, and then performing the following steps. The wood chips used have countless irregularities on their surface and are not water-impregnated from the outside. The process involves a first step of gradually adding a magnesium-based solidifying agent to wood chips and mixing it to adhere and fill the depressions in the uneven surface of the wood chips, and a second step of adding soil and sand to the mixture from the first step and dry-mixing it homogenously to produce wood chip paving material. The resulting wood chip paving material is then poured with water, mixed, and spread evenly on the roadbed.

Description

Technical Field

[0001] The present invention relates to a wood chip paving method for performing pavement paving work using a novel wood chip paving material.

[0002] Examples of wood chip paving materials are described in the following patent documents.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The wood chip paving technology described in the above patent document uses only wood chips, magnesium-based solidifying agents, soil, sand, and water as a mixture, but there is a problem that the magnesium-based solidifying agent in the mixture is unevenly distributed, resulting in insufficient bonding between the wood chips and the surrounding soil and sand, and thus peeling and cracking of the wood chips are likely to occur after paving. In contrast, the present invention aims to provide a wood chip paving method that can firmly bond wood chips and the surrounding soil and sand without unevenness using a novel wood chip paving material, so that there is almost no peeling or cracking after paving, and a strong road surface can be formed.

Means for Solving the Problems

[0005] The wood chip paving method using the wood chip paving material according to the present invention is characterized by the following configuration. That is, it is a paving method of a wood chip paving material characterized by preparing wood chips, a magnesium-based solidifying agent, and aggregates and performing the following steps, wherein the wood chips are not externally hydrated, The method is characterized by the following steps: firstly, a magnesium-based solidifying agent is added little by little to the wood chips and mixed to uniformly adhere and fill the depressions in the surface irregularities of the wood chips; and secondly, after the first step, aggregate such as soil is added and dry-mixed to a homogeneous consistency to produce wood chip paving material; and then water is poured onto the thus produced wood chip paving material and mixed, and the resulting mixture is spread and leveled on the roadbed. [Effects of the Invention]

[0006] According to the present invention, in the wood chip paving material, a magnesium-based solidifying agent is uniformly attached and filled into the depressions of the surface irregularities of the wood chips, which are free from external moisture, before the addition of aggregate such as soil and water is poured in. When aggregate is added, water is poured in and mixed, the solidifying agent uniformly attached and filled into the depressions of the surface irregularities of the wood chips liquefies, and when spread and leveled on the roadbed, it leaks and diffuses into the surrounding soil and solidifies after coming into contact with each other. As a result, the wood chips and the surrounding soil are strongly bonded, resulting in a strong paved surface, no peeling of the wood chips after paving, and reduced cracking.

[0007] Furthermore, wood chip paving material is environmentally friendly because it does not contain harmful components such as heavy metals, and it only needs to be crushed when disposed of. [Brief explanation of the drawing]

[0008] [Figure 1] (a) and (b) are schematic diagrams of the wood chip paving material, respectively. [Figure 2] (a) to (c) are perspective views showing each step in the manufacturing process of wood chip paving material. [Figure 3] (a) to (c) are perspective views showing each stage of the paving work. [Modes for carrying out the invention]

[0009] The wood chip paving material A used in the present invention is a paving material suitable for paving, for example, sidewalks and parts of parks. As shown in the overall schematic diagram and enlarged schematic diagram in Figures 1(a) and (b), it is composed of a mixture of wood chips 10, a magnesium-based solidifying agent 11, and soil 12, with these components being homogeneously mixed. A key feature is that the magnesium-based solidifying agent 11 is attached to and fills each of the surface recesses 10a of each wood chip 10.

[0010] The wood chips 10 are made by crushing various types of thinned wood. Therefore, the surface of the wood chips 10 has countless irregularities, and a considerable amount of magnesium-based solidifying agent 11 can be held in these surface depressions 10a. The type of wood used for the wood chips 10 is not limited to coniferous trees such as cedar and cypress, or cherry trees, and it may include bark. Furthermore, the wood chips 10 may be made by mixing multiple types with different particle sizes in any ratio. In addition, the wood chips 10 may be pre-colored, and in this case, natural pigments should be used as the coloring agent.

[0011] The magnesium solidifying agent 11 is preferably a magnesium oxide powder solidifying agent.

[0012] The soil and sand 12 can be, for example, ordinary soil, colored soil, mountain sand, river sand, small gravel, or mixtures thereof, and will serve as aggregate for the paving material A. Depending on the size and mixing ratio of the particles, the paving material A can be given a desired color and texture.

[0013] In paving material A, the volume ratio of wood chips 10, magnesium oxide-based solidifying agent 11, and soil 12 is preferably 5-6 for wood chips, 1-3 for magnesium oxide-based solidifying agent, and 3-4 for soil, and water should be mixed in a ratio of 1-3.

[0014] When this paving material A is mixed with water and spread on the roadbed, the magnesium-based solidifying agent 11 reacts with the water over time, liquefying and penetrating the wood chips 10 and surrounding soil 12, causing them to solidify. At this time, the magnesium-based solidifying agent 11 liquefies due to water absorption, leaks out from surface depressions 10a of the wood chips 10, diffuses, and comes into contact with the surrounding soil 12 before solidifying and becoming one with it. In other words, the amount of unbonded areas that tend to occur between the wood chips 10 and the surrounding soil 12 is reduced, resulting in a strong bond between the wood chips 10 and the surrounding soil 12. As a result, the pavement surface becomes stronger and less prone to cracking, which is an advantage. Furthermore, since this paving material A does not contain harmful components such as heavy metals, it is environmentally friendly and only needs to be crushed when disposed of. Although the magnesium-based solidifying agent 11 is basically strongly alkaline, the wood chips 10 are acidic, so the neutralization action makes the paving material A weakly alkaline overall, which also reduces the environmental burden.

[0015] Next, the method for manufacturing the paving material A of the present invention will be described. The method for manufacturing paving material A, as shown in the perspective views of Figures 2(a) and (b), comprises a first step of mixing wood chips 10 and a magnesium-based solidifying agent 11 such that at least the magnesium-based solidifying agent 11 adheres to and fills the depressions 10a on the surface of each wood chip 10, and a second step of adding soil and sand 12 to the mixture from the first step and dry-mixing it homogenously.

[0016] In the first step, wood chips 10 are placed in the mixer 2 and started, and then magnesium-based solidifying agent 11 is added little by little while being thoroughly mixed. In this way, the magnesium-based solidifying agent 11 covers the entire surface of each wood chip 10 and adheres uniformly to and fills the surface depressions 10a of the wood chips 10. As described above, the effect is that the pavement surface becomes stronger and less prone to cracking. However, if wood chips 10, magnesium-based solidifying agent 11, and soil 12 are mixed at the same time, the soil 12 will fill some of the surface depressions 10a of the wood chips 10 instead of the magnesium-based solidifying agent 11, and the aforementioned effect will not be obtained.

[0017] In the second step, the mixture obtained in the first step and the earth and sand 12 are kneaded dry until they become homogeneous. Since the wood chip paving material formed by the first and second steps does not contain water, it does not solidify and can be transported as it is to a distant construction site. Also, if the wood chips 10 and the earth and sand 12 are sufficiently dried, they can be sealed as a premix product and stored for a long time.

[0018] As shown in the perspective view of FIG. 2(c), the method for manufacturing the paving material A may further include a third step of injecting water into the mixture obtained by the first and second steps and kneading it. Since the paving material after this third step starts to solidify, the third step must be performed immediately before the paving work.

[0019] Next, an outline of the paving method using the paving material A will be described while referring to the perspective views of FIGS. 3(a) to (c).

[0020] FIG. 3(a) shows the operation of carrying the wood chip paving material A by a wheelbarrow 23 and spreading it on the roadbed B. The roadbed B is a flat ground that is one level lower than the surrounding ground or a surface obtained by spreading crushed stones or the like on the ground. The roadbed B is compacted by rolling or the like, and there is a wooden framework 20 at the periphery of the roadbed B. In order to enhance the bonding property with the paving material A, it is advisable to sprinkle water on the roadbed B to sufficiently moisten it before spreading the paving material A.

[0021] FIG. 3(b) shows the operation of leveling the wood chip paving material A. This operation is performed using a rake or a hoe 21. After the paving material A is leveled on the roadbed, it is compacted by pressing a wooden board, a trowel, etc. from above.

[0022] Figure 3(c) shows rain protection after paving work. Wood chip paving material A hardens in 4 to 5 days to a week after paving work, but if there is heavy rainfall during that time, problems such as delayed hardening and weakening may occur. To prevent this, it is advisable to protect the pavement with a plastic sheet 22 or the like. It is also necessary to surround the paved surface with a fence or pylons 24 or the like to prevent people from walking on it before it hardens. [Explanation of Symbols]

[0023] A Wood chip paving material 10 wood chips 10a Surface recess 11. Magnesium-based solidifying agent 12. Sediment

Claims

1. A method for paving with wood chip paving material, characterized by preparing wood chips, a magnesium-based solidifying agent, and aggregate, and then performing the following steps: The aforementioned wood chips were not moistened from an external source. Wood chip paving material is produced by a first step of mixing the wood chips with a magnesium-based solidifying agent while gradually adding it to the wood chips, thereby uniformly adhering and filling the depressions in the surface irregularities of the wood chips; and a second step of adding soil and other aggregates after the first step and dry-mixing them uniformly. A method of paving with wood chip paving material, characterized by pouring water onto the wood chip paving material thus produced, mixing it, and then spreading and leveling it on the roadbed.

2. In claim 1, A paving method using wood chip paving material, characterized by the use of multiple types of wood chips with different particle sizes.

3. In claim 1 or 2, A paving method using wood chip paving material, characterized by the use of pre-colored wood chips.

4. In claim 1 or 2, The method for paving with wood chip paving material is characterized in that the magnesium-based solidifying agent is a magnesium oxide powder solidifying agent.

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