Bamboo shop

Abstract

To propose a pavement using a bamboo material which can be easily constructed regardless of a new pavement or an existing pavement.SOLUTION: The bamboo material pavement includes a thin layer of crushed bamboo material surface layer formed on the pavement, and the crushed bamboo material surface layer is composed of a mixed material obtained by mixing at least a binder, crushed bamboo material, and a separation inhibitor. The method for constructing the bamboo material pavement includes at least a step of mixing a binder, crushed bamboo material, and a separation inhibitor to form a mixed material, and a step of spraying the mixed material on the pavement to form a crushed bamboo material surface layer.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] We will disclose paving technology using bamboo materials. [Background technology]

[0002] Wood-based pavements, such as those laid on park walkways, are constructed by a method in which a surface layer of wood is laid evenly to a thickness of about 3 to 5 cm on top of a pavement such as asphalt or concrete. As an example of such wood-based pavements, Patent Document 1 discloses a bamboo pavement in which a concrete pavement is newly laid and a bamboo surface layer is formed on the surface of the concrete pavement, and the bamboo surface layer is made of a mixture of only bamboo chips, fiber, or powder and a binder.

[0003] In the case of wood-based pavement constructed using a leveling method that results in a surface layer of wood material about 5 cm thick, cracks and warping are likely to occur due to drying shrinkage, mainly due to the nature of wood, unless the underlying asphalt or concrete pavement is new and strong. Therefore, for example, Patent Document 1 discloses a wood-based pavement in which a concrete pavement made from a specified mixture of materials is newly constructed for bamboo pavement, and a surface layer of bamboo is formed on top of that pavement. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3383246 Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the prior art, the present invention proposes a bamboo pavement that is less likely to crack or warp after construction and a construction method therefor, and can be constructed on either a newly constructed pavement (newly constructed pavement) made of asphalt or concrete, or an existing pavement (existing pavement). [Means for solving the problem]

[0006] One embodiment of the bamboo pavement of the present invention includes a thin layer of crushed bamboo surface layer formed on the pavement, and is characterized in that the crushed bamboo surface layer is composed of a mixed material that is a mixture of at least a binder, crushed bamboo, and a separation inhibitor.

[0007] Another aspect of the bamboo pavement is characterized in that it includes a primer formed on the pavement and a thin layer of crushed bamboo surface layer formed on the primer, and the crushed bamboo surface layer is composed of a mixed material that is a mixture of at least a binder, crushed bamboo, and a separation inhibitor.

[0008] In these bamboo paving styles, pigments can be further mixed into the crushed bamboo surface layer. The term "thin layer" refers to a layer with a thickness of 10 mm or less, and the crushed bamboo surface layer in the bamboo paving described above is preferably 3 mm or less. The crushed bamboo used in this thin layer is preferably made up of crushed pieces with a maximum length of 2 mm or less.

[0009] One aspect of the present invention involves the steps of: mixing at least a binder, crushed bamboo, and a separation inhibitor to create a mixed material; and spraying the mixed material onto the pavement to form a crushed bamboo surface layer. The spraying of the mixed material can be carried out in at least two spraying steps: a first spraying step in which the mixed material is sprayed onto the pavement and allowed to dry; and a second spraying step in which the mixed material is sprayed onto the pavement after the first spraying step and allowed to dry.

[0010] Another aspect of the bamboo paving construction method includes the steps of: mixing at least a binder, crushed bamboo, and a separation inhibitor to create a mixed material; applying a primer to the pavement; and spraying the mixed material onto the applied primer to form a crushed bamboo surface layer. The spraying of the mixed material can be carried out in at least two spraying operations: a first spraying operation in which the mixed material is sprayed onto the primer and allowed to dry, and a second spraying operation in which the mixed material is sprayed after the first spraying and allowed to dry.

[0011] In these application methods, pigments can be added to the mixed material. The thickness of the pulverized bamboo surface layer formed by spraying is preferably 3 mm or less. The pulverized bamboo is made by pulverizing and sieving bamboo, preferably into pulverized pieces with a maximum length of 2 mm or less. [Effects of the Invention]

[0012] The crushed bamboo surface layer of the present invention uses crushed bamboo consisting of finely crushed pieces of 2 mm or less, for example. This crushed bamboo is mixed with at least a binder and a separation inhibitor to form a mixed material, which can be sprayed to form a thin layer of, for example, 3 mm or less. Because it is a thin layer, defects such as cracking and warping are less likely to occur, making it easy to apply as a surface layer to both new and existing pavements. Furthermore, this sprayable mixed material can be applied without sagging not only on horizontal surfaces such as road surfaces, but also on inclined and vertical surfaces. [Brief explanation of the drawings]

[0013] [Figure 1] Schematic cross-sectional view showing an example of bamboo paving in the case of asphalt paving. [Figure 2] Schematic cross-sectional view showing an example of bamboo paving in the case of concrete paving. [Figure 3] 1 is a process diagram illustrating an example of a bamboo paving construction method. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present invention will be described by way of specific examples.

[0015] Figure 1 shows a cross-sectional view of a bamboo pavement, where a crushed bamboo surface layer is applied to a newly constructed or existing asphalt pavement. As shown in the figure, a thin crushed bamboo surface layer is formed on the surface of the asphalt pavement. The thickness of the thin crushed bamboo surface layer is 3 mm or less, and optimally 2 mm or less.

[0016] Figure 2 shows a cross-sectional view of a bamboo pavement in which a crushed bamboo surface layer is applied to a newly constructed or existing concrete pavement. As shown in the figure, a primer is applied to the surface of the concrete pavement, and a thin crushed bamboo surface layer is applied on top of the primer. In this example, the primer is applied to the concrete pavement surface as an adhesion promoter to improve the adhesion of the crushed bamboo surface layer. The thickness of the thin crushed bamboo surface layer is 3 mm or less, as in the example of Figure 1, and optimally 2 mm or less.

[0017] Figure 3 shows an example of the construction process for these bamboo paving methods.

[0018] Step 1 is the preparation stage, in which the area to be paved with asphalt, concrete, or other mortar is cleaned with water or the like, and masked as necessary.

[0019] In step 2, the materials required for the surface layer of the crushed bamboo are mixed to create a mixture. The components of the mixture are binder (and water), crushed bamboo, and a separation inhibitor, with pigments added as needed. The optimal weight ratio for each material is as follows: ·Binding material: 30~50% ·Wednesday: 20~40% ·Crushed bamboo material: 10~40% Separation inhibitor: 2~10% Pigment: 0~5%

[0020] Aqueous acrylic resin is used as the binder. Other water-based resins such as water-based urethane resin and water-based epoxy resin can also be used, but water-based acrylic resin is the best choice in terms of the uniformity of the finish, prevention of sagging, light resistance, ease of application with a spray gun, environmental considerations, and ease of handling.

[0021] Crushed bamboo is made by crushing felled bamboo, sieving it, and then preparing a collection of crushed pieces below a certain size. Crushed bamboo can be fibrous, rectangular (angular), circular, or oval in shape, but in any case, by sieving the pieces, the maximum length of each crushed piece—that is, the longest side, diameter, or major axis of the crushed piece—is reduced to 2 mm or less. Crushed pieces longer than 2 mm are not suitable for forming thin layers, nor are they suitable for spray application using a simple spray gun.

[0022] Anti-segregation agents (also known as thickeners) are used to improve the mixing of the crushed bamboo with the binder, ensuring that the crushed bamboo is evenly distributed throughout the layer. Without an anti-segregation agent, the lighter crushed bamboo may float in the binder, causing the two to separate and not mix properly. A suitable anti-segregation agent is a powdered mineral.

[0023] Pigments are used as needed to adjust the color (lighter / dark, blackish / white, etc.) of the finished bamboo paving.

[0024] The above materials are placed in a container such as a bucket and mixed using a hand mixer to form a slurry-like mixed material.

[0025] Step 3 is a primer application step that can be applied when working on concrete pavement. Step 3 is not necessary for asphalt pavement (hence the dotted line). Commercially available resin-based primers can be used as an adhesion promoter for concrete pavement. For example, the primer should be applied at a rate of 0.1 to 0.2 kg / m to the work area. 2 Apply with.

[0026] Step 4 is the first spraying of the mixed material. An appropriate amount of the mixed material prepared in step 2 is placed in a hopper spray gun and sprayed onto the application area. For example, in the first spraying operation, 1.5 kg / m of mixed material is sprayed. 2 After spraying is complete, let it dry for about 30 minutes in step 5.

[0027] Step 6 is the second spraying of the mixed material. The remaining mixed material is placed in a hopper spray gun and sprayed onto the area where the first spraying and drying have been completed. For example, the second spraying operation also involves spraying 1.5 kg / m of mixed material. 2 After spraying is complete, let it dry for about 30 minutes in step 7, then cure. Curing is required to completely harden the resin, and the recommended curing time is at least 12 hours in summer and at least 24 hours in winter.

[0028] In the construction method of this example, the mixed material was sprayed in two separate steps. To explain this by using specific numerical values ​​as an example, the total spray amount of the mixed material was 1.0 to 3.0 kg / m 2 The first spraying is 0.5 to 1.5 kg / m 2 , 0.5 to 1.5 kg / m for the second spraying operation 2 To prevent poor hardening, spray 0.5 to 1.5 kg / m 2 By these two spraying operations, a thin layer of crushed bamboo surface material having a thickness of 3 mm or less, preferably 1 to 2 mm, is formed.

[0029] The number of times the mixed material is sprayed may be divided into three or more times. For example, 1.0 kg / m 2 The spraying work was carried out three times with a total spray amount of 3.0 kg / m 2 The more times the spraying process is performed, the more natural the texture and depth of color can be achieved on the surface that is formed.

[0030] A performance evaluation test was carried out using the specimens prepared according to the above construction method. The test results are shown below.

[0031] [1] Adhesion strength The bond strength was measured using a Construction Research Institute type tensile tester. The result was 0.81 N / mm for the asphalt pavement specimen. 2 , 0.53N / mm for concrete pavement specimens 2 According to the Construction Guidelines for Outdoor Sports Facilities (Japan Sports Facilities Association, revised edition 2012), the standard physical property value of acrylic resin surface materials is 0.3 N / mm 2Therefore, it is clear that the adhesive strength is sufficient. [2] Skid resistance value (BPN) The test results for the specimen showed a value of 70 when wet. According to the Pavement Design and Construction Guidelines (Japan Road Association, 2006 edition), the guideline value is 40 when wet, so it can be seen that the material has sufficient skid resistance. [3] GB coefficient (shock absorption) · SB coefficient (rebound resilience) The results of GB and SB tests on the specimen showed a GB coefficient (%·cm) of 23 and a SB coefficient (%·cm) of 5. When these results were compared with the values ​​given in the Pavement Performance Evaluation Method Supplement - Evaluation Methods for Required Performance Indicators as Needed (Japan Road Association), they fell within the walkability range comparable to that of clay-based / asphalt elastic mixtures. It was confirmed that the pavement has better shock absorption and is easier to walk on than general asphalt and concrete pavements. [4] Penetration water amount An on-site permeability test was conducted to examine the amount of water seepage when the crushed bamboo surface layer of the example was applied to a permeable pavement. According to the Pavement Design and Construction Guidelines (Japan Road Association, 2006 edition), the guideline value for the amount of water seepage on a sidewalk is 300 ml / 15 s. The amount of water seepage on the permeable pavement before spraying the mixed material was 1218 ml / 15 s, and after spraying the mixed material, the amount of water seepage was 702 ml / 15 s. Although a 45.6% decrease was observed, it was confirmed that the amount of water seepage was sufficient compared to the guideline value.

[0032] The embodiment described above by way of example has the following advantages. The use of bamboo allows for a pavement surface that blends in with nature, making it ideal for use in zoos, natural parks, etc. In such cases, it can be applied to existing pavements, making construction inexpensive and easy. The crushed bamboo surface layer uses a mixed material containing the above-mentioned ingredients, and because the crushed bamboo is broken into small pieces of 2 mm or less, the mixed material can be sprayed onto the surface, resulting in a thin layer. This mixed material can be applied not only on large-scale projects using a spraying machine, but also with simple spraying machines such as hopper spray guns and ricin guns. Because it is sprayed, it can be easily applied at low cost to both new and existing pavements. Furthermore, because it is sprayed onto a thin layer, it can be applied without sagging not only on horizontal surfaces such as road surfaces, but also on inclined and vertical surfaces, making it versatile. Since it is a spray-on application, when it is applied to existing pavement, even if there are cracks in the pavement, it can be applied by simply repairing them with repair material. The surface layer of the crushed bamboo is a thin layer applied by spraying, so it hardens in a short time, shortening the curing time and allowing for early release. Furthermore, even if cracks develop on the surface layer of the crushed bamboo due to aging, they can be easily repaired by spraying again on top.

[0033] Although several embodiments of the present invention have been shown and described above, various other embodiments can be conceived based on the concept of the present invention understood from the above description.

Claims

1. A bamboo pavement including a crushed bamboo surface layer having a thickness of 3 mm or less formed on the pavement, A bamboo pavement in which the surface layer of the crushed bamboo is made of a mixed material that is a mixture of at least a binder, crushed bamboo, and a separation inhibitor, and the crushed bamboo consists of crushed pieces with a maximum length of 2 mm or less.

2. A bamboo pavement comprising a primer formed on the pavement and a crushed bamboo surface layer having a thickness of 3 mm or less formed on the primer, A bamboo pavement in which the surface layer of the crushed bamboo is made of a mixed material that is a mixture of at least a binder, crushed bamboo, and a separation inhibitor, and the crushed bamboo consists of crushed pieces with a maximum length of 2 mm or less.

3. 3. The bamboo pavement according to claim 1 or 2, wherein a pigment is further mixed into the mixed material.

4. A method for constructing bamboo paving, comprising: Mixing at least a binder, crushed bamboo, and a separation inhibitor to form a mixed material; and spraying the mixed material onto the pavement to form a crushed bamboo surface layer. The crushed bamboo material is made by crushing and sieving bamboo into crushed pieces having a maximum length of 2 mm or less, The application method uses either a hopper spray gun or a spray gun including a lysine gun to spray the mixed material.

5. The spraying of the mixed material is a first spraying operation of spraying the mixed material onto the pavement and drying it; 5. The construction method according to claim 4, wherein the construction method comprises at least two spraying operations, that is, a second spraying operation in which the mixed material is sprayed and dried after the first spraying operation.

6. A method for constructing bamboo paving, comprising: Mixing at least a binder, crushed bamboo, and a separation inhibitor to form a mixed material; applying a primer onto the pavement; and spraying the mixed material onto the primer to form a pulverized bamboo surface layer. The crushed bamboo material is made by crushing and sieving bamboo into crushed pieces having a maximum length of 2 mm or less, The application method uses either a hopper spray gun or a spray gun including a lysine gun to spray the mixed material.

7. The spraying of the mixed material is a first spraying operation of spraying the mixed material onto the primer and drying it; The application method according to claim 6, wherein the application is carried out by at least two spraying operations, that is, a second spraying operation in which the mixed material is further sprayed and dried after the first spraying operation.

8. The application method according to any one of claims 4 to 7, further comprising adding a pigment to the mixed material.

9. A construction method according to any one of claims 4 to 7, wherein the thickness of the crushed bamboo surface layer after formation is 3 mm or less.

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