Spray-seeding greening material and spray-seeding greening construction method

Abstract

The invention provides a spray-seeding greening material and a spray-seeding greening construction method, which have improved rainfall loss resistance and erosion resistance even before plant growth. A spray-seeding greening material obtained by mixing a soil erosion inhibitor, fibers, a binder, a fertilizer and seeds, the soil erosion inhibitor mainly comprising a synthetic resin emulsion, having a viscosity [eta] of 1000 mPa.s < [eta] < = 3200 mPa.s, and having a blending amount of 60-200 g per 1 m < 2 > spray-seeding area, and the fiber blending amount of 80-170 g per 1 m < 2 > spray-seeding area.

Description

Technical Field

[0001] The present invention relates to a hydroseeding greening material for hydroseeding onto the ground surface such as a slope for greening and a hydroseeding greening construction method. Background Art

[0002] There is known a hydroseeding greening construction method of hydroseeding a hydroseeding greening material onto the ground surface such as a slope for greening. For example, in Patent Document 1, it is described that by the hydroseeding greening construction method, an early sterile annual plant covers the ground surface to form a green space, thereby preventing soil erosion. This hydroseeding greening construction method is carried out by hydroseeding a slurry mixture obtained by mixing soil, a soil erosion prevention material, an adhesive, a fertilizer, etc. and water into a mixer onto the ground surface by a soil spraying machine, in addition to Kurapia cuttings and early sterile annual plants.

[0003] In addition, in Patent Document 1, the following is described: As a soil erosion prevention agent, for example, a product named "Kuricoat (registered trademark) C-710" mainly composed of a synthetic resin emulsion is used. As an adhesive, for example, "Kuricoat C-402" mainly composed of a water-soluble synthetic polymer is used. As the mixing amount per seeding area of the hydroseeding greening material, it is preferably Kurapia 96 (g / m 2 ), soil 12 (g / m 2 ), soil erosion prevention material 24 (g / m 2 ), adhesive 0.6 (g / m 2 ), fertilizer 60 (g / m 2 ), and early sterile annual plant seeds 15 to 30 (g / m 2 ).

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2021-122265 Summary of the Invention

[0007] As described above, it is well known that greening is effective in preventing erosion. However, due to rainfall caused by abnormal weather such as recent sudden heavy rains and large typhoons, the hydroseeding greening material sometimes flows away or is eroded before the plants grow.

[0008] Therefore, an object of the present invention is to provide a hydroseeding greening material and a hydroseeding greening construction method that improve the resistance to rainfall loss and erosion even before the plants grow.

[0009] The hydroseeding greening material of the present invention is a mixture of a soil erosion inhibitor, fibers, a binder, fertilizers, and seeds. The hydroseeding greening material is characterized in that the soil erosion inhibitor has a synthetic resin emulsion as the main component, a viscosity η of 1000 mPa·s < η ≤ 3200 mPa·s, and a blending amount of 60 to 200 g per 1 m 2 of the hydroseeding area, and the blending amount of the fibers is 80 to 170 g per 1 m 2 of the hydroseeding area. In addition, in this specification, the numerical range indicated by "~" means a numerical range including the numerical values before and after "~" as the lower limit value and the upper limit value.

[0010] The soil erosion inhibitor having a synthetic resin emulsion as the main component and a viscosity η of 1000 mPa·s < η ≤ 3200 mPa·s is originally a chemical agent used to form a firm consolidation layer on the exposed surface of landfills and newly created lands to prevent flying sand, dust, and erosion. The consolidation layer formed by such a soil erosion inhibitor can prevent flying sand for a long time due to its excellent strength and weather resistance. However, since the soil erosion inhibitor with a viscosity η of 1000 mPa·s < η ≤ 3200 mPa·s solidifies the soil and hinders the growth of plants, it cannot be used in hydroseeding greening.

[0011] Therefore, in the hydroseeding greening material of the present invention, fibers are mixed in the soil erosion inhibitor. The fibers are fibers (pulp) extracted from wood, grass, etc., and the main component is cellulose. Cellulose has the property of binding through hydrogen bonds. For every 1 m 2 of the hydroseeding area of the soil erosion inhibitor with a viscosity η of 1000 mPa·s < η ≤ 3200 mPa·s, 80 to 170 g of fibers are mixed per 1 m 2 of the hydroseeding area, so that the agglomerated layer formed by the soil erosion inhibitor has connectivity and agglomerates in a well-balanced manner without hindering the growth of plants.

[0012] In addition, the blending amount of the soil erosion inhibitor is preferably 80 g or more and 180 g or less, and more preferably 160 g or less. When the blending amount of the soil erosion inhibitor is less than 60 g per 1 m 2 of the hydroseeding area, the agglomerated layer becomes weak and may partially flow away on a flat surface. In addition, there is a problem that the loss frequency becomes higher on a slope (about 1:1.0) erected on a slope. On the other hand, if the blending amount of the soil erosion inhibitor exceeds 200 g per 1 m 2 of the hydroseeding area, the agglomerated layer is too firm and may cause poor germination.

[0013] In addition, the blending amount of the fibers is preferably 100 g or more or 120 g or more and 160 g or less. If the blending amount of the fibers is less than 1 m 2If the spraying area is 80 g, the connectivity of the agglomeration layer is insufficient and the balance deteriorates, which may cause poor germination. On the other hand, if the blending amount of the fiber exceeds 1 m 2 If the spraying area is 170 g, the balance of the connectivity with the agglomeration layer deteriorates.

[0014] The blending amount of the binder is preferably 0.100 - 0.175 g per 1 m 2 spraying area, and more preferably 0.125 - 0.150 g. Since the soil erosion preventive agent used in the spraying greening material of the present invention has a relatively high viscosity η of 1000 mPa·s < η ≤ 3200 mPa·s, it is difficult to mix and solidifies during mixing. Therefore, by making the blending amount of the binder 0.100 - 0.175 g per 1 m 2 spraying area, the spraying greening material can be uniformly mixed.

[0015] (1) The spraying greening material is prepared by mixing a soil erosion preventive agent, fibers, a binder, fertilizers, and seeds. The soil erosion preventive agent has a synthetic resin emulsion as the main component, a viscosity η of 1000 mPa·s < η ≤ 3200 mPa·s, and a blending amount of 60 - 200 g per 1 m 2 spraying area. The blending amount of the fibers is 80 - 170 g per 1 m 2 spraying area. According to this spraying greening material, an agglomeration layer that agglomerates well in a balanced manner without hindering plant growth can be formed, thereby achieving greening, improving the resistance to rainfall runoff and erosion resistance. After the plants grow, due to the effect of reducing the hindrance of the flowing water by the further growing plants, a synergistic effect is produced in preventing erosion, and a stronger ground surface is obtained.

[0016] (2) By making the blending amount of the binder 0.100 - 0.175 g per 1 m 2 spraying area, the spraying greening material can be uniformly mixed, and stable spraying can be carried out. Detailed implementation mode

[0017] The spraying greening material in the embodiment of the present invention is a spraying greening material for spraying on the ground surface such as slopes and flat surfaces for greening. The spraying greening material in this embodiment is prepared by mixing a soil erosion preventive agent, fibers, a binder, fertilizers, and seeds. In the spraying greening construction method in this embodiment, the spraying greening material in this embodiment is sprayed onto the ground surface by using a spraying machine such as a hydroseeder or a soil spraying machine for construction.

[0018] The soil erosion preventive agent has a synthetic resin emulsion as the main component. In addition, the soil erosion preventive agent with a viscosity η of 1000 mPa·s < η ≤ 3200 mPa·s is used, more preferably 1100 mPa·s or more, and further preferably 1200 mPa·s or more. As the soil erosion preventive agent, for example, Kuricoat (registered trademark) U-228 Green (Kurita Water Industries Ltd.), which is a sand, dust, and erosion preventive agent of the impregnation and consolidation type, can be used.

[0019] The physical properties of Kuricoat U-228 Green are as follows: main component: synthetic resin emulsion, appearance property: green milky liquid, pH (25 °C): 6.0 - 8.0 (neutral), viscosity η (25 °C): 500 - 2000 mPa·s, specific gravity (25 °C): 1.04 - 1.06. As the soil erosion prevention material, the viscosity η of this Kuricoat U-228 Green is adjusted to 1000 mPa·s < η ≤ 2000 mPa·s, more preferably adjusted to 1100 mPa·s ≤ η ≤ 2000 mPa·s, and further preferably adjusted to 1200 ≤ η ≤ 2000 mPa·s for use. In addition, the soil erosion prevention material with a viscosity η exceeding 1000 mPa·s has a higher viscosity than that of Kuricoat C-710, which is a soil erosion preventive agent for slope greening with a synthetic resin emulsion as the main component, at 200 - 1000 mPa·s (23 °C), solidifies the soil and hinders the growth of plants, so it is generally not used in hydroseeding greening.

[0020] The fiber is fiber (pulp) extracted from wood, grass, etc., and the main component is cellulose. As the fiber, for example, Prince Fiber (trade name) or Fujimi Fiber (trade name), etc., which are seed hydroseeding maintenance materials, can be used.

[0021] The binder has a water-soluble synthetic polymer as the main component. As the binder, for example, Kuricoat C-402 (Kurita Water Industries Ltd.), which is a binder for greening projects, can be used. The physical properties of Kuricoat C-402 are as follows: main component: water-soluble synthetic polymer, appearance property: white granular powder, pH (20 °C): 6.8 - 8.0 (0.4% solution), viscosity (30 °C): 200 - 500 mPa·s (0.4% solution), bulk density 0.65 - 0.85.

[0022] Chemical fertilizers can be used as fertilizers. In particular, as fertilizers, high-concentration chemical fertilizers with a combined component content rate of nitrogen, phosphoric acid, and potassium, which are the main components in chemical fertilizers, exceeding 30% are preferably used. As high-concentration chemical fertilizers, for example, as the main components, high-concentration chemical fertilizers (All 15) containing 15% of nitrogen, phosphoric acid, and potassium respectively can be used.

[0023] In the hydroseeding greening material of this embodiment, in addition to the above soil erosion preventer, fiber, and binder, fertilizers, seeds, water, etc. are also put into a mixer to form a slurry-like mixture. At this time, the blending amount of the soil erosion preventer is 60 - 200 g per 1 m 2 spray seeding area, and the blending amount of the fiber is 80 - 170 g per 1 m 2 spray seeding area. In addition, the blending amount of the binder is 0.100 - 0.175 g per 1 m 2 spray seeding area. The blending amount of the binder is adjusted according to the soil quality.

[0024] In addition, in the hydroseeding greening material of this embodiment, the blending amount of the seeds is 7.5 - 20.0 g per 1 m 2 spray seeding area, more preferably 10.0 - 17.5 g, and the blending amount of the fertilizer is 20 - 50 g per 1 m 2 spray seeding area, more preferably 30 - 40 g. Furthermore, in the hydroseeding greening material of this embodiment, 0.300 - 0.750 g of color powder is mixed per 1 m 2 spray seeding area, and more preferably 0.400 - 0.600 g of color powder is mixed.

[0025] On the ground surface where the hydroseeding greening material of the above embodiment is sprayed, an agglomerated layer that agglomerates well in a balanced manner without hindering the growth of plants is formed for greening. On this ground surface, even before the plants grow, the resistance to rainfall runoff and erosion is improved through the agglomerated layer. After the plants grow, due to the effect of reducing the flow resistance of the further growing plants, a synergistic effect is produced in preventing erosion, and a stronger ground surface is obtained.

[0026] Examples

[0027] A construction experiment was conducted on the hydroseeding greening material of the above embodiment. Table 1 shows the results of the construction experiment and the blending amounts of the hydroseeding greening material of the present invention considered to be the best.

[0028]

Table

[0029]

[0030] In addition, in order to confirm the applicable range of the blending amount of the fiber of the present invention (80 - 170 g per 1 m 2 spray seeding area), based on the blending amounts in Table 1, construction experiments were conducted with only a small amount (70 g) and a large amount (180 g) of fiber. Table 2 shows the results.

[0031]

Table

[0032]

[0033] In addition, in order to confirm the applicable range of the blending amount of the fertilizer of the present invention (20 to 50 g per 1 m 2 spray sowing area), based on the blending amount in Table 1, construction experiments were carried out with only a small amount (10 g) and a large amount (60 g) of the fertilizer. Table 3 shows the results.

[0034]

Table

[0035]

[0036] In addition, in order to confirm the applicable range of the blending amount of the soil erosion preventive agent of the present invention (60 to 200 g per 1 m 2 spray sowing area), based on the blending amount in Table 1, construction experiments were carried out with only a small amount (50 g) and a large amount (210 g) of the soil erosion preventive agent. Table 4 shows the results.

[0037]

Table

[0038]

[0039] In addition, in order to confirm the applicable range of the blending amount of the binder of the present invention (0.100 to 0.175 g per 1 m 2 spray sowing area), based on the blending amount in Table 1, construction experiments were carried out with only a small amount (0.075 g) and a large amount (0.200 g) of the binder. Table 5 shows the results.

[0040]

Table

[0041]

[0042] In addition, in order to confirm the applicable range of the blending amount of the color powder of the present invention (0.300 to 0.750 g per 1 m 2 spray sowing area), based on the blending amount in Table 1, construction experiments were carried out with only a small amount (0.250 g) and a large amount (0.800 g) of the color powder. Table 6 shows the results.

[0043]

Table

[0044]

[0045] In addition, in order to confirm the applicable range of the blending amount of the seeds of the present invention (per 1 m 2The spraying area is 7.5 to 20.0 g). Based on the compounding amounts in Table 1, construction experiments were carried out with only a small amount (5 g) and a large amount (25 g) of seeds. Table 7 shows the results.

[0046]

Table

[0047]

[0048] Industrial Applicability

[0049] The present invention is useful as a spraying greening material and a spraying greening construction method for spraying on the ground surface such as slopes for greening. In particular, it is suitable as a spraying greening material and a spraying greening construction method that improve the resistance to rainfall runoff and erosion even before plant growth.

Claims

1. A hydroseeding greening material, which is formed by mixing a soil erosion inhibitor, fibers, an adhesive, fertilizers, and seeds. The soil erosion preventive agent uses a synthetic resin emulsion as the main component, with a viscosity η of 1000 mPa·s < η ≤ 3200 mPa·s, and the blending amount is 60 to 200 g per 1 m 2 of the spraying area, The compounding amount of the fiber is 80-170 g per 1 m 2 spray sowing area.

2. The hydroseeding greening material according to claim 1, wherein, The compounding amount of the binder is 0.100 to 0.175 g per 1 m 2 spray seeding area.

3. A hydroseeding greening construction method, which sprays the hydroseeding greening material according to claim 1 or 2 onto the ground surface through a hydroseeder.

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