JP6504376B1 - Lawn growth material for golf course green and method of manufacturing the same - Google Patents

Abstract

An object of the present invention is to provide a grass growing material for golf course green having tile particles as a main component, which is suitable for aeration which can realize water retention and water permeability suitable for green.
SOLUTION: A grass growing material 6 for golf course green is mainly composed of tile material particles 30 obtained by crushing and classifying tiles. The 50% particle size of the tile particles 30 is more than 0.3 mm and not more than 3.5 mm, and the amount of fine particles having a particle size of 0.3 mm or less contained in the tile particles 30 is relative to the total weight of the tile particles 30 Less than 10% by weight.
[Selected figure] Figure 1

Description

  The present invention relates to a grass growing material for golf course green and a method of manufacturing the same.

  In golf course greens, a renewal work called aeration is performed to improve the permeability and permeability of the soil under the turf to promote turf growth. By periodically performing this aeration, the turf can be maintained in a good condition and a clean green can be maintained. Aeration is simply an operation of coring a cylindrical hole in a green, removing grass and soil on the surface, and then filling the hole with a turf growing material. Such turf growth materials are required to have contradictory performances of water retention and water permeability.

  As a turf growth material for green, it is preferable to use porous sintered tuff as a raw material, and crush and classify this. Pumice (registered trademark) can be exemplified as a representative product. Since sintered tuff is easy to fracture, porous particles made from sintered tuff can relatively easily achieve water retention and permeability suitable for green. However, since the porous particles are expensive, a substitute is required. In addition, since the porous particles are white, when used as a green, it is necessary to bake and apply a color compatible with the green.

  By the way, from the rise of recycling awareness in recent years, there is known a product in which waste tiles generated at the time of dismantling a house are crushed and reused as coarse aggregate. The shredded waste tiles are used, for example, as ground materials, gravels for weeding and crime prevention, and sands for horticulture. Patent Document 1 discloses a plant-growing soil made of crushed tile materials having an average particle size of 0.05 mm to 10 mm. Patent Document 1 describes an example of use in which tile shattering material is laid on the base of a golf course with a thickness of 5 cm.

JP 2008-307050 A

  As mentioned above, although the turf growth material made from sintered tuff is relatively easy to realize water retention and permeability suitable for green, it is expensive and resource amount is limited, and bake coating is There is an issue of necessity. It is also conceivable to apply tile breaking material as disclosed in Patent Document 1 to green as a substitute for PAMIS (registered trademark), but when general tile breaking material is used, water retention suitable for green and It is extremely difficult to achieve both permeability.

  An object of the present invention is to provide a grass growing material for golf course greens having tile material particles as a main component, which is suitable for aeration and capable of realizing water retention and water permeability suitable for greens. It is.

  The turf growth material for a golf course green according to the present invention is mainly composed of tile particles obtained by crushing and classifying tiles, and the 50% particle diameter of the tile particles exceeds 0.3 mm. The amount of fine particles having a particle diameter of 0.3 mm or less which is 5 mm or less and contained in the tile particles is less than 10% by weight with respect to the total weight of the tile particles.

  The turf growth material for a golf course green according to the present invention is suitable for aeration, and can achieve water retention and water permeability suitable for green. In addition, it can be manufactured using waste tiles and requires no baking coating, so it is an environmentally friendly and inexpensive product. The golf course green growth material according to the present invention is extremely promising as a substitute for grass growth material which uses sintered tuff as a raw material.

It is a figure which shows the green of the golf course to which the turf growing material for greens which is an example of embodiment is applied. It is a figure for demonstrating the manufacturing method of the turf growing material for green which is an example of embodiment.

  Hereinafter, an example of an embodiment of a turf growth material for a golf green according to the present invention and a method of manufacturing the same will be described in detail. In the present specification, the descriptions “numerical value (M) to numerical value (N)” mean numerical value (M) or more and numerical value (N) or less.

  FIG. 1 shows a green 1 using a grass growing material 6 for golf course green (hereinafter referred to as “grass growing material 6 for green”), which is an example of the embodiment. The green 1 is an area where the grass 2 is more finely arranged than the fairway, and has a cup 5. As described above, in the green 1, in order to improve the permeability and permeability of the soil 3 under the turf 2 to promote the growth of the turf 2, an update operation called aeration is performed. FIG. 1 shows the green 2 after aeration, in which a number of equally spaced holes 4 are formed in the green 1.

  In the green 1, the soil 3 gradually hardens due to the growth of the turf 2 and the treading pressure by a golf player or the like, so the air permeability and the water permeability of the soil 3 decrease, which is undesirable for roots. Therefore, it is important to periodically perform aeration (coring) to open the holes 4 in the green 1 to improve the air permeability and permeability of the soil 3 to promote rooting. Thereby, the turf 2 can be maintained in a good state and a clean green 1 can be maintained.

  The holes 4 are filled with the green grass growing material 6. The green grass growing material 6 is mainly composed of porous tile material particles 30 having many pores, and can store water and nutrients in the pores of the tile material particles 30. Since a part of the roots of the turf 2 enter into the pores of the tile particles 30, the water and nutrients stored in the pores can be efficiently absorbed. In addition, the green grass growing material 6 may be used as floor sand laid under the green 1. The green grass growing material 6 filled in the holes 4 is preferably composed of tile particles 30A and 30B described later, and the green grass growing material 6 used for floor sand is a tile material particles 30C described later , 30D are preferable.

  In the coring, generally, the cylindrical holes 4 are made in the green 1 so that the distance between the holes 4 is 10 cm or less. Thereafter, the core on the green 1 (the soil 3 in the part of the hole 4) is removed. An example of the diameter of the hole 4 is 1 cm to 2 cm, and an example of the depth is 10 cm to 20 cm. After removing the core, the green grass growing material 6 is ground on the green 1 having the holes 4 using an eye sand spreader and brushed to fill the holes 4 with the green grass growing material 6.

  As described above, the green grass growing material 6 is mainly composed of the tile particles 30. Here, the main component means the component with the largest weight among the components of the green grass growth material 6. The green grass growing material 6 may contain particles other than the tile particles 30, but is preferably composed of only the tile particles 30. In the present embodiment, it is assumed that the green grass growing material 6 is constituted only by the tile particles 30. That is, the green grass growing material 6 and the tile particles 30 are the same.

  The tile material which comprises the tile material particle 30 is a clay tile. Since the clay tile has many pores, the tile particles 30 produced from the clay tile make it easy to achieve water retention suitable for the green 1. Moreover, although a tile material is classified into a Japanese tile (Japanese tile) and a western tile by the shape, the tile particle 30 may be manufactured from either a Japanese tile or a western tile. However, it is preferable that the color of the tile material is gray or black so that the tile particles 30 do not stand out in the green 1 and the green of the green 1 shines. Since the Japanese tile has less variation in color as compared to western tiles, and the color is generally gray or black, the tile particles 30 are preferably produced from the Japanese tile.

  Although it is possible to use a new tile as the tile material which comprises the tile material particle 30, it is preferable to use the waste tile which arises at the time of house demolition etc. from a viewpoint of effective use of resources, reduction of product cost etc. . That is, specific examples of suitable tile materials constituting the tile particles 30 are gray or black clay tile wastes.

  The tile material particle 30 is a porous particle containing many pores, and has a water retention function utilizing pores as well as porous particles made from sintered tuff. Moreover, it is preferable that the tile material particle 30 does not have an angular shape and has a shape close to a spherical shape. The tile particles 30 filled in the holes 4 of the green 1 are stepped by, for example, a golfer and received pressure, but by using the spherical tile particles 30, even if a large pressure is applied to the particles, some of the particles It is possible to suppress chipping and micronization.

  The 50% particle size of the tile material particles 30 is more than 0.3 mm and not more than 3.5 mm. If the 50% particle size of the tile particles 30 is 0.3 mm or less, the water permeability of the soil 3 is reduced, and drainage of the green 1 becomes worse. On the other hand, when the 50% particle size of the tile particles 30 exceeds 3.5 mm, when the tile particles 30 (green turf growth material 6) are sprinkled on the green 1, the particles are caught on the turf 2 and fill the holes 4 It becomes difficult to do. The 50% particle size of the tile material particles 30 means the particle size when the particle weight is 50% in the particle size accumulation curve. The particle size accumulation curve is created in the same procedure as the coarse particle rate measurement described later.

  The 50% particle size of the tile material particles 30 is preferably 0.5 mm to 2.0 mm, more preferably 0.5 mm to 1.5 mm, particularly preferably 0.5 mm to 1.0 mm, or 0.5 mm to 0. It is 8 mm. For example, 50% particle diameter of tile material particles 30 exceeding 0.3 mm and 1.0 mm or less, 50% of tile material particles 30 having 50% particle diameter of 0.3 mm and 1.5 mm or less, and 50% The tile material particles 30 may have any particle size of more than 1.0 mm and 1.5 mm or less, or may be composed of a combination of at least two of them.

  The amount of fine particles having a particle size of 0.3 mm or less contained in the tile particles 30 is less than 10% by weight based on the total weight of the tile particles 30. When the amount of fine particles is 10% by weight or more, in particular, the water permeability is reduced and the water permeability of the green 1 is greatly deteriorated. When the 50% particle size of the tile material particles 30 is within the above range and the amount of fine particles having a particle size of 0.3 mm or less is less than 10% by weight, water retention and permeability suitable for the green 1 can be realized . The amount of fine particles having a particle size of 0.3 mm or less contained in the tile material particles 30 may be substantially 0% by weight.

  The amount of fine particles having a particle diameter of 0.3 mm or less contained in the tile particles 30 is measured in accordance with the fine particle amount test of the aggregate in the material test JIS A1103. Here, in JIS A 1103, the weight of particles passing through a # 0.074 mm sieve is counted, but in the measurement of the amount of fine particles of tile material particles 30, the weight of particles passing through a 0.3 mm sieve is counted Do. Hereinafter, unless otherwise specified, "fine particles" means fine particles having a particle size of 0.3 mm or less.

  Generally, the amount of fine particles contained in the tile 30 decreases as the 50% particle diameter of the tile 30 increases. When the 50% particle size of the tile particles 30 is more than 0.5 mm and 0.8 mm or less, the amount of fine particles is preferably 9.5% by weight or less. When the 50% particle size is more than 0.8 mm and not more than 1.0 mm, or more than 0.8 mm and not more than 2.0 mm, the amount of fine particles is preferably 3% by weight or less, and more preferably 1% by weight or less.

  Less than 5.0 is preferable and, as for the coarse particle rate of the tile material particle 30, less than 4.5 is more preferable. When the coarse particle ratio is 5.0 or more, it may be difficult to maintain the water retention suitable for the green 1. Water retentivity and water permeability suitable for Green 1 when the 50% particle size of the tile material particles 30 is within the above range, the amount of fine particles is less than 10% by weight, and the coarse particle ratio is less than 5.0. It becomes easy to be compatible. The coarse particle rate of the tile material particles 30 is measured based on the sieving test of the aggregate according to the material test JIS A 1102.

  Generally, the coarse particle rate of the tile particles 30 becomes smaller as the 50% particle size of the tile particles 30 becomes smaller. When the 50% particle size of the tile particles 30 exceeds 1.0 mm, the preferable coarse particle ratio is 5.0 or less. When the 50% particle size is more than 0.8 mm and 1.0 mm or less, the coarse particle ratio is preferably 4.5 or less, and more preferably 4.0 or less. When the 50% particle size is more than 0.5 mm and 0.8 mm or less, the coarse particle ratio is preferably 4.0 or less, and more preferably 3.5 or less.

The following (1)-(3) are mentioned as a specific example of the suitable tile material particle | grains 30. As shown in FIG.
(1)
Tile material: Gray or black clay tile waste 50% particle size: 0.5mm to 0.8mm
Fine particle amount: 9.5% by weight or less, or 9% by weight or less Coarse particle rate: 4.0 or less (2)
Tile material: Gray or black clay tile waste 50% particle size: 0.8mm ~ 1.0mm
Fine particle amount: 1% by weight or less, or 0.5% by weight or less Coarse particle ratio: 4.5 or less (3)
Tile material: Gray or black clay tile waste 50% particle size: 1.0mm-2.0mm
Amount of fine particles: 1% by weight or less, or 0.5% by weight or less Coarse particle rate: 5.0 or less

  As described above, the tile material particles 30 are rounded non-cornered particles that are close to spherical and have small particles and coarse particles and uniform particle sizes. By using such a tile material particle 30 for aeration of the green 1, water retention and water permeability suitable for the green 1 can be easily realized. Moreover, since the tile material particles 30 can be manufactured from waste tiles and require no baking coating, they are environmentally friendly and inexpensive products. Therefore, it is very promising as a substitute for turf growth material that uses cemented tuff as a raw material.

  Hereinafter, an example of a method for manufacturing the green grass growing material 6 will be described in detail with reference to FIG. 2 as appropriate. FIG. 2: is a figure which shows an example of the manufacturing system 10 (it is hereafter set as "the manufacturing system 10") of the turf growing material for golf courses green.

  As illustrated in FIG. 2, the manufacturing system 10 includes a wet classifier and a dry classifier. The manufacturing system 10 includes a first wet classifier 12, a second wet classifier 13, and a third wet classifier 14 as wet classifiers, and a vibration sieving machine 17 as a dry classifier. The manufacturing system 10 further includes a rotary centrifugal crusher 11, a heat treatment machine 15, and a cooler 16. According to the manufacturing system 10, the tile material particles 30 having a 50% particle size in the range of more than 0.3 mm and 3.5 mm or less, a fine particle amount of less than 10% by weight, and a coarse particle ratio of less than 5.0. It is possible to manufacture efficiently.

  The green grass growing material 6 (the tile particles 30) is manufactured through a wet classification step, a drying step, and a dry classification step. The wet classification step is, for example, a step of removing coarse particles by wet classification of tile shredders obtained by crushing tiles, to obtain wet classification particles A having a particle size of 3.5 mm or less, and wet classification. Wet-classifying particles A to remove fine particles having a particle diameter of at least 0.3 mm or less to obtain wet classified particles B having a particle diameter of 3.5 mm or less. The drying step is a step of drying the wet classified particles obtained in the wet classification step. In the dry classification step, the wet classified particles after drying are dry-classified using a vibrating sieving machine having a sieve mesh with a pore size of 0.3 mm to 1.5 mm to remove fine particles of at least 0.3 mm in particle diameter or less A step of obtaining at least one dry classified particle having a 50% particle size of more than 0.3 mm and not more than 3.5 mm. In the present manufacturing process, at least the dry classified particles are obtained as the tile particles 30. The details of the present manufacturing process will be described below.

The following steps are included in the process of producing a suitable green grass growing material 6.
(1) First wet classification step A tile obtained by crushing a tile using a first wet classifier 12 having an inner mesh 12A with a hole diameter of 5 mm to 50 mm and an outer mesh 12B with a hole diameter of more than 2.5 mm and 3.5 mm or less By coarsely classifying the crushed material 20, the coarse particles 21 captured by the inner mesh 12A are removed, and the coarse classification particles X captured by the outer mesh 12B and the first wet classified particles 22 passing through the outer mesh 12B are obtained. .
(2) Second wet classification step: The coarse classification particles X are wet classified using the second wet classifier 13 having the outer mesh 13B having a pore diameter of more than 1.5 mm and 2.5 mm or less, and thus captured by the outer mesh 13B. The roughly classified particles Y are removed, and the second wet classified particles 23 having passed through the outer net 13B are obtained.
(3) Third Wet Classification Step The first wet classification particles 22 and the second wet classification particles 23 are wet classified using the third wet classifier 14 to remove fine particles 24 of at least 0.3 mm in diameter. , Third wet classified particles 25 are obtained.
(4) Fourth wet classification step The third wet classification particles 25 are wetted using a fourth wet classifier (for example, the same apparatus as the second wet classifier 13) having a mesh with a pore diameter of more than 1.5 mm and 2.5 mm or less. Classification is performed to obtain coarse classified particles Z captured by the net and fourth wet classified particles 26 passing through the net.
(5) Fifth wet classification step By wet classification of the fourth wet classification particles 26 using a fifth wet classifier (for example, the same apparatus as the third wet classifier 14), at least the particle diameter is 0.3 mm or less The fine particles 27 are removed to obtain a fifth wet classified particle 28 having a particle size of 2.5 mm or less.
(6) Drying Step The wet classified particles (for example, the fifth wet classified particles 28) obtained in the wet classification step are dried. The coarsely classified particles Z obtained in the fourth wet classification step may be dried to obtain the tile particles 30.
(7) Dry Classification Step The wet classified particles after drying are dry classified using a vibrating sieving machine 17 having a sieve mesh with a pore size of 0.3 mm to 1.5 mm. In the dry classification step, the fine particles 29 having a particle diameter of at least 0.3 mm or less are removed, for example, by dry classification of the fifth wet classified particles 28 using a vibrating sieving machine 17 having at least two stages of sieves At least two types of dry classified particles having a 50% particle size in the range of more than 0.3 mm and 1.5 mm or less are obtained.

  In the manufacturing process, at least one selected from the coarse classification particles Z obtained in the fourth wet classification step and the dry classification particles obtained in the dry classification step is obtained as the tile particles 30. In the example shown in FIG. 2, coarse classified particles Z having an average particle diameter of more than 1.5 mm and 3.5 mm or less are obtained as the tile particles 30D. In the dry classification step, the first to third dry classified particles are obtained as tile particles 30A, 30B, and 30C, respectively.

  The tile shredded material 20 supplied to the manufacturing system 10 is manufactured by shredding tiles, as described above. The tile used as the raw material of the tile shatter 20 is a clay tile, and particularly preferably a gray or black clay tile. The tile shredded material 20 is produced, for example, by shattering gray or black Japanese tiles. Moreover, the tile is preferably a waste tile that is generated at the time of dismantling a house.

  The step of manufacturing the green grass growing material 6 includes the step of squaring the tile crush 20 by squaring the tile crush 20 using the rotary centrifugal crusher 11. The shattered tile 20 is generally angular, so if it is applied to the green grass growth material 6 in this shape, when the golfer steps on it and presses it, the protrusions of the particles are chipped and pulverized to an eye The clogging may occur, and the permeability of the green 1 may be deteriorated. For this reason, it is preferable to provide the said process and to perform cornering and spheroidization of the tile shatter 20.

  The rotary centrifugal crusher 11 is installed upstream of the first wet classifier 12 in the production system 10. In this case, the tile crush 20 cut off by the rotary centrifugal crusher 11 is supplied to the first wet classifier 12. An example of a suitable rotary centrifugal crusher 11 includes Vermac (manufactured by Ube Industries, Ltd.). In addition, the shredded tile 20 is further shredded in the rotary centrifugal crusher 11.

  The first wet classification step is a step of wet classification of the cut tiled crushed material 20 using the first wet classifier 12 to obtain coarse classification particles X and first wet classification particles 22. The first wet classifier 12 has, for example, a structure in which a net made of perforated iron plate (inner net 12A, outer net 12B) is stretched in a cylindrical shape, and is rotated and vibrated with the central axis slightly inclined from horizontal. The shredded tile 20 introduced into the inner net 12A is wet classified using the inner net 12A and the outer net 12B. As an example of the suitable 1st wet classification machine 12, Trommel rotation type | mold sorter (made by Niihama Iron Works Ltd.) is mentioned.

  The hole diameter of the inner mesh 12A is preferably 10 mm to 30 mm, for example, 20 mm. The hole diameter of the outer mesh 12B is, as described above, more than 2.5 mm and not more than 3.5 mm, for example, 3.5 mm. Here, the holes of the inner net 12A and the outer net 12B are punched holes of a perfect circle shape, and the hole diameter means the diameter of the hole. In this case, coarse particles 21 having a particle size exceeding 20 mm are captured by the inner mesh 12A, and coarse classified particles X having a particle diameter of more than 3.5 mm and 20 mm or less are captured by the outer mesh 12B. Then, the first wet classified particles 22 having a particle diameter of 3.5 mm or less, which have passed through the outer net 12B, are sent to the third wet classification step. The roughly classified particles X include some particles having a particle diameter of 3.5 mm or less. For this reason, coarse classification particle X is supplied to the 2nd wet classification process.

  The second wet classification step is a step of wet classification of the coarse classification particles X using the second wet classifier 13 to remove the coarse classification particles Y and obtaining the second wet classification particles 23. For the second wet classifier 13, the same trommel rotary type sorter as the first wet classifier 12 can be used. As the inner net 13A, the same net as the inner net 12A of the first wet classifier 12 can be used. On the other hand, the hole diameter of the outer net 13B is more than 1.5 mm and not more than 2.5 mm, for example 2.5 mm. In this case, coarse particles (not shown) are captured by the inner mesh 13A, and coarse classified particles Y having a particle size exceeding 2.5 mm are captured by the outer mesh 13B. The second wet classified particles 23 having a particle diameter of 2.5 mm or less which have passed through the outer net 13B are sent to the third wet classification step. The coarsely classified particles Y are preferably again supplied to the rotary centrifugal crusher 11 and crushed.

  The third wet classification step is a step of wet classification of the first wet classification particles 22 and the second wet classification particles 23 using the third wet classifier 14 to obtain the third wet classification particles 25. The third wet classifier 14 includes, for example, a pool storing an aqueous dispersion of the first wet classified particles 22 and the second wet classified particles 23, and a drain port for removing fine particles together with overflow water, Remove fine particles 24 of .3 mm or less. As an example of the suitable 3rd wet classification machine 14, a high mesh separator (made by Seki Co., Ltd.) is mentioned.

  A 4th wet classification process is a process of obtaining tile material particle 30D which is coarse classification particle Z, and the 4th wet classification particle 26 by carrying out wet classification of the 3rd wet classification particle 25 using a 4th wet classifier. . In the example shown in FIG. 2, the same one as the second wet classifier 13 is applied as the fourth wet classifier. In this case, the tile material particles 30D having a 50% particle diameter of more than 2.5 mm and 3.5 mm or less are captured by the outer mesh 13B, and the fourth wet classified particles 26 having a particle diameter of 2.5 mm or less pass the outer mesh 13B. It is supplied to the fifth wet classification step.

  The fifth wet classification step is a step of obtaining the fifth wet classified particles 28 having a particle diameter of 2.5 mm or less by subjecting the fourth wet classified particles 26 to wet classification using a fifth wet classifier. In the example shown in FIG. 2, the same one as the third wet classifier 14 is applied as the fifth wet classifier. In this case, at least the fine particles 27 with a particle size of 0.3 mm or less are removed, and the fifth wet classified particles 28 with a particle size of 2.5 mm or less are supplied to the drying step.

  In the drying step, the wet classified particles obtained in the wet classification step, for example, the fifth wet classified particles 28 are dried. Water is removed from the fifth wet classified particles 28 by heating the fifth wet classified particles 28 at a temperature of 80 ° C. or higher, for example, 80 ° C. to 200 ° C., or 80 ° C. to 150 ° C. Furthermore, the heating process is performed so that seeds such as weeds that may be attached to the particles do not germinate. As the heat processing machine 15 which can be used for a drying process, a clay machine (made by Sankei Seisakusho Co., Ltd.) is mentioned. The fifth wet classified particles 28 after drying are filled in the cooler 16 and cooled. Examples of the cooler 16 include air-cooled or refrigerant-cooled hoppers.

  In the dry classification step, the dried fifth wet classified particles 28 are dry classified using the vibrating sieving machine 17, and the tile material particles 30A, 30B, 30C which are the first, second, and third dry classified particles are used. It is a process to obtain. The vibrating screen 17 has a first screen 17A, a second screen 17B, and a third screen 17C. By using the three-stage sieving machine 17, three types of tile material particles 30A, 30B, and 30C having different 50% particle sizes can be efficiently produced. However, the vibrating sieving machine may be a one-stage sieve or a two-stage sieve. In any case, it is preferable to sufficiently remove fine particles having a particle size of 0.3 mm or less.

  For example, the pore size of the first screen 17A is 0.3 mm, the pore size of the second screen 17B is 1.0 mm, and the pore size of the third screen 17C is 1.5 mm. In addition, since a sieve mesh is generally a wire mesh, the hole diameter means the pitch of a wire mesh. In the dry classification step using the vibrating sieve 17, the 50% particle size of the tile particles 30 captured by the sieve mesh may be smaller than the pore diameter of the sieve mesh. This is considered to be because particles smaller than the pore size of the sieve mesh remain without being sieved. In addition, the 50% particle size of the tile particles 30 also changes depending on the number of sieve stages and the combination of sieve screens.

  As described above, fine particles having a 50% particle diameter of more than 0.3 mm and not more than 2.5 mm, and a particle diameter of not more than 0.3 mm are finally obtained through the squashing step of tile shredded material 20, a plurality of wet classification steps and a dry classification step The tile particles 30A, 30B, 30C having a content of less than 10% by weight can be obtained.

  Hereinafter, the present invention will be further described by way of examples, but the present invention is not limited to these examples.

Example 1
Tile material particles having a 50% particle size, a coarse particle ratio, and a fine particle amount shown in Table 1 were produced using the production system 10 shown in FIG. 2, and the tile material particles were used as a green grass growth material. The tile particles are dry classified particles captured by the first sieve 17A of the vibrating sieve 17. The conditions of the manufacturing process are as follows.
Tile shatter 20: shredded tile with a particle size of 0 mm to 40 mm (Japanese tile)
Rotary centrifugal crusher 11: Vermac (made by Ube Industries, Ltd.)
First, second and fourth wet classifiers 12 and 13: Trommel (made by Niihama Iron Works Ltd.)
Pore diameter of inner mesh of first wet classification machine: 20 mm, Pore diameter of outer mesh: 3.5 mm
Pore diameter of inner mesh of second and fourth wet classifiers: 20 mm, Pore diameter of outer mesh: 2.5 mm
Third and fifth wet classifier 14: High mesh separator (made by Koko Co., Ltd.)
Heat treatment machine: Burner (manufactured by Sankei Seisakusho Co., Ltd.)
Heat treatment conditions: furnace temperature 100 ° C. to 200 ° C. x treatment time 20 minutes Vibrating sieve 17: Circular vibrating sieve (made by Kowa Kogyosho)
Pore diameter of the first sieve 17A: 0.3 mm
The hole diameter of the second sieve 17B: 1.0 mm
Hole diameter of the third sieve 17C: 1.5 mm
Dry classified particles captured by the first sieve 17A (pore diameter: 0.3 mm) of the vibrating sieving machine 17 were obtained as tile particles.

Example 2
The second sieve 17B of the vibrating sieve 17 of Example 1 is removed, and dry classification is performed using the first sieve 17A and the third sieve 17C, and the dry classification captured by the first sieve 17A (pore diameter 0.3 mm) is obtained. Obtained as tile particles.

Example 3
The dry classified particles captured by the second sieve 17B (pore diameter: 1.0 mm) of the vibrating sieve 17 of Example 1 were obtained as tile particles.

Example 4
The dry classified particles captured by the third sieve 17C (pore diameter: 1.5 mm) of the vibrating sieve 17 of Example 1 were obtained as tile particles.

Example 5
The wet classified particles captured by the outer net of the fourth wet classifier 13 of Example 1 were dried and obtained as tile particles.

<Comparative Examples 1 to 3>
The same shredded tile as in Example 1 was sieved to produce 50% particle diameter, coarse ratio, and fine particle amount of tile material particles shown in Table 1, respectively.

Comparative Example 4
A commercially available shredded tile (tile chip) was used as a green grass growing material.

Comparative Example 5
Commercially available natural sand was used as a green grass growth material.

  For each of the green and green turf growth materials of the examples and comparative examples, 50% particle size, uniformity coefficient, coarse particle ratio, and amount of fine particles less than 0.3 mm particle size, saturated water permeability coefficient, and effective water content by the following methods It was measured. The evaluation results are shown in Table 1.

[50% particle size and uniformity factor]
Material Test The aggregate sieving test of JIS A 1102 was conducted to prepare a particle size accumulation curve. From the particle size accumulation curve, the particle size when the particle weight is 50% was determined as the 50% particle size (D ₅₀ ). Similarly, the 60% particle size (D ₆₀ ) and the 10% particle size (D ₁₀ ) were determined, and the uniformity coefficient was determined by the following equation.
Uniformity factor = D ₆₀ / D ₁₀

[Particle amount]
The amount of fine particles having a particle diameter of less than 0.3 mm contained in the green turf growth material was measured in accordance with the fine particle weight test of the aggregate in the material test JIS A1103. Here, in JIS A 1103, the weight of particles passing through a sieve of # 0.074 mm is counted, but in the measurement of the amount of fine particles of the turf growth material for green, the weight of particles passing through a sieve of # 0.3 mm is I counted.

[Coarse grain rate]
The coarse particle rate of the turf growth material for green was measured based on the screening test of aggregate of material test JIS A 1102.

[Saturated hydraulic conductivity]
The saturated hydraulic conductivity of the green grass growth material was measured based on the soil permeability test method of material test JIS A 1218: 2009.

[Effective water content]
The effective moisture content of the green grass growth material was determined using the moisture characteristic curve obtained by measurement based on the soil water retention test method according to Geotechnical Society Standard JGS 0151-2009.

[Aeration]
Aeration of the greens was carried out using the green grass growth materials of Examples and Comparative Examples, and the water retention and permeability of the greens were evaluated by the following methods. The evaluation results are shown in Table 1.
The specific aeration procedure is as follows.
A cylindrical hole is made in the green so that the distance between the holes is 10 cm or less. Then remove the core on the green. The diameter of the hole was 1 cm to 2 cm, and the depth was 10 cm to 20 cm. After removing the core, the green grass growth material is spread on the green having the holes using an eye sand spreader, and the green grass growth material is filled in the holes by brushing.

[Green evaluation (water retention)]
Evaluation criteria are as follows.
:: A good turf condition can be maintained by watering once every two days in summer (during no rainfall).
○: A good turf condition can be maintained by watering once a day in summer.
X: In summer, in order to maintain the good condition of the turf, watering twice or more a day is required.

[Green evaluation (water permeability)]
Evaluation criteria are as follows.
: 1: No pooling occurred even during continuous rainfall of about 15 mm per hour.
○: No pooling occurs even during continuous rainfall of about 10 mm per hour.
X: A puddle occurs during continuous rainfall of 5 mm or less per hour.

  As shown in Table 1, all of the green grass growth materials (tile material particles) of the examples are materials having a small amount of fine particles having a particle size of less than 0.3 mm, less than 10% by weight, and a low coarse particle ratio. . Therefore, the uniformity coefficient is small and the particle size is uniform. The turf growth material for greens of the example has water permeability performance exceeding natural sand (comparative example 5), and its water retention performance is about intermediate between the shredded tile (comparative example 4) and natural sand. That is, the turf growth material for green of the example is a material having good water permeability and good water retention performance.

  As shown in Table 1, when the green turf growth material of the example is used for aeration, water retention and water permeability suitable for green can be easily realized.

  1 Green, 2 Grass, 3 Soil, 4 Holes, 5 Cup, 6 Golf Field Greening Material, 10 Golf Field Greening Material Production System, 11 Rotary Centrifuge, 12 First Wet Classifier, 12A, 13A inner mesh, 12B, 13B outer mesh, 13 second wet classifier, 14 third wet classifier, 15 heat processor, 16 cooler, 17 vibrating sieve, 17A first sieve, 17B second sieve, 17C 3rd sieve, 20 tile shatters, 21 coarse particles, 22 first wet classification particles, 23 second wet classification particles, 24, 27, 29 fine particles, 25 third wet classification particles, 26 fourth wet classification particles, 28 fourth 5 wet classification particles 30, 30, 30A, 30B, 30C, 30D tile material particles, X, Y, Z coarse classification particles

Claims (4)

A method of producing a turf growth material for golf course green comprising tile material particles having a 50% particle diameter of more than 0.3 mm and not more than 3.5 mm and a content of particles of not more than 0.3 mm being less than 10% by weight And
Coarse particles obtained by crushing tiles are subjected to wet classification to remove coarse particles, thereby obtaining wet classified particles A having a particle size of 3.5 mm or less, and wet classification of the wet classified particles A. And removing at least fine particles having a particle size of 0.3 mm or less to obtain wet classified particles B having a particle size of 3.5 mm or less;
Drying the wet classified particles obtained in the wet classification step;
By dry-classifying the wet classified particles after drying using a vibrating sieving machine having a sieve mesh with a pore size of 0.3 mm to 1.5 mm, fine particles of at least 0.3 mm in particle diameter or less are removed, and 50% particles A dry classification step of obtaining at least one dry classification particle having a diameter of 0.3 mm or more and 3.5 mm or less;
Equipped with
Furthermore, the method further comprises the step of squaring the tile crush material by using a rotary centrifugal crusher, and spheroidizing the tile crush material, and supplying the chamfered tile crush material to the wet classification step;
The manufacturing method of the turf growth material for golf courses greens which acquire the said dry classification particle | grains as said tile material particle. A method of producing a turf growth material for golf course green comprising tile material particles having a 50% particle diameter of more than 0.3 mm and not more than 3.5 mm and a content of particles of not more than 0.3 mm being less than 10% by weight And
Wet classification step of obtaining wet classification particles from crushed tile materials obtained by crushing the tiles;
Drying the wet classified particles;
By dry-classifying the wet classified particles after drying using a vibrating sieving machine having a sieve mesh with a pore size of 0.3 mm to 1.5 mm, fine particles of at least 0.3 mm in particle diameter or less are removed, and 50% particles A dry classification step of obtaining at least one dry classification particle having a diameter of 0.3 mm or more and 3.5 mm or less;
Equipped with
The wet classification process is
The first internal mesh is obtained by wet classification of the shredded tile using a first wet classifier having a first internal mesh with a hole diameter of 5 mm to 50 mm and a first outer mesh with a hole diameter of more than 2.5 mm and 3.5 mm or less. A first wet classification step of removing coarse particles captured by the first outer mesh, and obtaining the first wet classified particles passing through the first outer mesh and the first outer classification particles;
By wet classification of the coarse classification particles X using a second wet classifier having a mesh having a pore diameter of more than 1.5 mm and 2.5 mm or less, coarse classification particles Y captured by the mesh are removed, and the mesh is A second wet classification step of obtaining second wet classification particles passing through;
By wet classification of the first wet classification particles and the second wet classification particles using a third wet classifier, fine particles of at least 0.3 mm in particle diameter or less are removed, and the particle diameter is 3.5 mm or less A third wet classification step of obtaining third wet classification particles;
Coarse classified particles Z captured by the network by passing the third wet classification particles by wet classification using a fourth wet classifier having a mesh having a pore diameter of more than 1.5 mm and 2.5 mm or less, and passing through the mesh A fourth wet classification step of obtaining fourth wet classification particles;
By subjecting the fourth wet classification particles to wet classification using a fifth wet classifier, fine particles of at least 0.3 mm in particle diameter or less are removed, and fifth wet classification particles having a particle diameter of 2.5 mm or less are obtained. The fifth wet classification step,
Including
Furthermore, the method further comprises the step of squaring the tile crush material by using a rotary centrifugal crusher, and spheroidizing the tile crush material, and supplying the chamfered tile crush material to the wet classification step;
The turf growth material for golf course greens, wherein at least one selected from the coarse classification particles Z obtained in the fourth wet classification step and the dry classification particles obtained in the dry classification step is obtained as the tile particles. Manufacturing method. In the dry classification step, at least two types of the dry classified particles having a 50% particle size in the range of more than 0.3 mm and 1.5 mm or less are obtained using the vibrating sieving machine having at least two stages of the screen. The manufacturing method of the turf growing material for golf courses greens of Claim 2 which is. The method for producing a grass growing material for golf course green according to any one of claims 1 to 3 , wherein the crushed tile is produced by crushing a black or gray tile.

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