Manufacturing method of plant materials

Abstract

To provide a method for producing a plant material, which can produce a high-quality plant material by effectively utilizing a cement-containing material. [Solution] Plant material 15 is produced by adding a water absorbent material 13 and a soil conditioner 14 to a cement-containing material 12. By effectively utilizing the cement-containing material 12, high-quality plant material 15 can be produced with low environmental impact.

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a method for producing a plant material. [Background technology]

[0002] Conventionally, cement milk overflowing from pile driving, pile extraction, and other pile construction work has been treated at intermediate treatment plants, and most of it has been disposed of after treatment. In addition, excess ready-mix concrete such as mortar, leftover concrete, and returned concrete from construction sites is returned from the construction site to ready-mix concrete plants and treated as industrial waste. As such, the current situation is that the cement contained in cement milk, mortar, leftover concrete (leftover concrete), returned concrete (returned concrete), etc. is not reused, even though it is a naturally occurring material.

[0003] Therefore, a method for reusing excess ready-mixed concrete is known in which powdered biochar is added to the excess ready-mixed concrete and mixed and stirred to produce a granulated material. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2024-162448 Summary of the Invention [Problem to be solved by the invention]

[0005] However, simply adding biochar to excess ready-mix concrete only results in a hard, granular granulated material that can be used for road subgrades or ordinary crushed stone, and it is difficult to turn it into a high-quality plant material suitable for use as, for example, gardening materials or agricultural materials.

[0006] The problem to be solved by the present invention is to provide a method for producing a plant material that can effectively utilize cement-containing materials to produce high-quality plant material. [Means for solving the problem]

[0007] The method for producing a plant material of the present invention comprises the steps of: Slurry-like For cement-containing materials For absorbing moisture in this cement-containing material Water absorbent material and To adjust the pH of this cement-containing material and prevent it from hardening, Plant materials are produced by adding soil conditioners. [Effects of the Invention]

[0008] According to the present invention, a high-quality plant material can be produced by effectively utilizing a cement-containing material. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is an explanatory diagram schematically illustrating a method for manufacturing a plant material according to one embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will now be described with reference to FIG.

[0011] 1 shows a manufacturing system 10. The manufacturing system 10 is a manufacturing system for manufacturing a soil-like plant material 15 using a cement-containing material 12, a water-absorbing material 13, and a soil conditioner 14 as raw materials.

[0012] The cement-containing material 12 is at least one of cement milk, mortar, leftover concrete, and returned concrete. Cement milk is preferably waste material that overflows during pile construction, such as at a pile driving site where piles P are driven or at a pile extraction site where piles P are removed. Mortar, leftover concrete, and returned concrete are generated at construction sites. In other words, the cement-containing material 12 is waste material that would have been discarded in the past. The cement-containing material 12 is before solidification and is in a slurry state containing a lot of water.

[0013] The water-absorbing material 13 rapidly absorbs water from the cement-containing material 12, thereby inhibiting the solidification of the cement-containing material 12. The water-absorbing material 13 is formed in pellet or powder form. As the water-absorbing material 13, at least one of carbonized material (biochar), water-absorbing mud modifier, and bamboo powder is preferably used, and a mixture of any two or more of these may also be used. The carbonized material is, for example, a recycled material obtained by carbonizing paper sludge in a carbonization furnace, or a recycled material obtained by carbonizing sawdust discharged during lumber milling. The water-absorbing mud modifier is, for example, paper sludge incineration ash (PS ash) mixed with a special agent and hydrated; wattle is used as an example.

[0014] The soil improvement material 14 functions as a pH adjuster that adjusts the pH value of the plant material 15. Examples of soil improvement materials 14 that can be used include waste mushroom beds, limonide (Aso loess), and peat moss. Waste mushroom beds are mushroom beds (culture medium) discarded after mushroom harvesting, i.e., recycled materials. The soil improvement material 14 is preferably an acidic material with a pH value set to about 3 to 4. The pH value of the plant material 15 varies depending on its intended use, but is set to about 5.0 to 7.5, which is a pH range suitable for major plants. The soil improvement material 14 is also essential for preventing the cement-containing material 12 from solidifying and for maintaining the plant material 15 in a relatively soft state, so that it can be easily crushed by hand and pulverized.

[0015] When producing plant material 15, first, cement-containing material 12 is transported from a construction site or the like using a transport vehicle 16 or the like and stored in storage tank 17, and the slurry-like cement-containing material 12 stored in storage tank 17, pulverized soil improvement material 14, and separately prepared water-absorbing material 13 are weighed and mixed in a mixer 18 such as a universal mixer. When using waste mushroom beds as soil improvement material 14, the waste mushroom beds are crushed into fine particles using a crusher 19 and then used.

[0016] The soil improvement material 14 and the water-absorbing material 13 are mixed with the cement-containing material 12 at a predetermined ratio. In this embodiment, each is mixed with the cement-containing material 12 at a weight ratio of 30% to 50%, preferably 50%. If the soil improvement material 14 is added at less than 30%, the plant-supporting material 15 becomes hard. Adding more than 50% soil improvement material 14 does not significantly increase the effectiveness compared to adding more than 50%, making it uneconomical. If the cement-containing material 12 contains aggregate, such as leftover concrete or returned concrete, the aggregate is removed. This aggregate removal can be done before or after mixing the water-absorbing material 13 and the soil improvement material 14. However, since the mixing ratio of the water-absorbing material 13 and the soil improvement material 14 to the cement-containing material 12 is set based on the weight ratio, it is preferable to remove the aggregate from the cement-containing material 12 using a sieve or the like before mixing the water-absorbing material 13 and the soil improvement material 14.

[0017] The above manufacturing method results in granular plant-supporting materials 15 that are hard enough to be easily crushed by hand while preventing the cement-containing material 12 from solidifying. The completed plant-supporting materials 15 are appropriately weighed, bagged, and shipped.

[0018] Thus, according to one embodiment, plant material 15 is produced by adding water absorbent material 13 and soil conditioner 14 to cement-containing material 12, thereby effectively utilizing cement-containing material 12 to produce high-quality plant material 15 that is unsolidified, granular, and has a hardness that can be easily crushed by hand, and has a loose soil texture. Furthermore, plant material 15 can be easily produced through a simple process that basically involves only mixing, without having to consider temperature, humidity, time, climate, weather, etc. The produced plant material 15 can be suitably used as, for example, a gardening material, an agricultural material, a forestry material, etc., and can also improve drainage by forming cavities around plant material 15 mixed into the soil, which allows water to easily seep in.

[0019] By using at least one of cement milk, mortar, returned concrete, and residual concrete as the cement-containing material 12, these cement-containing materials 12 that have conventionally been discarded as industrial waste can be effectively recycled, saving resources and reducing environmental load.

[0020] Furthermore, because the water-absorbing material 13 is made of at least one of carbonized material produced by carbonizing paper sludge, water-absorbent mud modifier, and bamboo powder, these water-absorbing materials 13 are materials in which carbon dioxide absorbed by plants through photosynthesis during growth is fixed inside. This eliminates the need for separate carbonated water or other means to fix carbon dioxide, contributing to reduced carbon dioxide emissions. In other words, because the carbon dioxide fixed in the water-absorbing material 13 is persistent, carbon dioxide that would normally be decomposed and released into the atmosphere can be trapped in the soil (so-called "carbon sequestration"), thereby reducing greenhouse gas emissions into the atmosphere. Furthermore, unless the plant-supporting material 15 is burned, the fixed carbon dioxide will not be released into the atmosphere. By mixing the plant-supporting material 15 into the soil of fields and other areas, it can be permanently trapped and stored in the soil. According to the plant-supporting material 15 of this embodiment, approximately 65% ​​to 90% of carbon dioxide can be trapped in the soil even after 100 years, leading to reduced environmental impact.

[0021] Furthermore, the plant material 15 has many fine holes, which increases the surface area exposed to air, and is expected to have an effect of absorbing carbon dioxide, which is believed to be the cause of odors and global warming.

[0022] Furthermore, because the soil improvement material 14 has a pH adjusting function, the pH value of the plant-supporting material 15 can be easily adjusted according to the added amount of the soil improvement material 14. For example, by adding 30% to 50% by weight of the soil improvement material 14 relative to the weight ratio of the cement-containing material 12, a soft and economical plant-supporting material 15 can be produced, and the hardness and pH value of the plant-supporting material 15 can be easily set according to the added weight ratio of the soil improvement material 14.

[0023] Furthermore, by using waste mushroom beds as soil conditioner 14, plant material 15 can be produced inexpensively, and the raw materials used to produce plant material 15, namely cement-containing material 12, water-absorbing material 13, and soil conditioner 14, are all recycled materials, which reduces waste, conserves resources, and has an extremely small environmental impact.

[0024] Furthermore, by adding the water absorbent material 13 in an amount of 30% to 50% by weight of the cement-containing material 12, solidification of the cement-containing material 12 is effectively suppressed, contributing to the production of a high-quality plant material.

[0025] Although the embodiment of the present invention and its modified examples have been described above, various combinations of configurations, partial omissions, substitutions and modifications are also possible. [Explanation of symbols]

[0026] 12 Cement-containing materials 13 Water absorbing material 14 Soil improvement materials 15 Plant materials

Claims

1. A method for producing plant materials by adding a water-absorbing material to a slurry-like cement-containing material to absorb the moisture in the cement-containing material and a soil improvement material to adjust the pH of the cement-containing material and prevent it from solidifying. A method for producing a plant material, comprising:

2. The cement-containing material is at least one of cement milk, mortar, returned concrete, and residual concrete.

2. The method for producing a plant material according to claim 1.

3. The water-absorbing material is at least one of carbonized material, water-absorbing mud modifier, and bamboo powder.

2. The method for producing a plant material according to claim 1.

4. The soil conditioner is waste mushroom beds.

2. The method for producing a plant material according to claim 1.

5. The amount of the water-absorbing material added is 30% to 50% by weight of the cement-containing material.

2. The method for producing a plant material according to claim 1.

6. The soil improvement material to be added is 30% to 50% by weight of the cement-containing material.

2. The method for producing a plant material according to claim 1.

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