KR102380742B1 - How to maintain the Masato playground - Google Patents

Abstract

The present invention relates to a granite soil playground maintenance method, more specifically, comprising: a surface cleaning step of cleaning a surface of a granite soil playground; a surface flattening step of flattening the playground surface after the surface cleaning step; a paving step of paving granite soil on the playground after the surface flattening step; a spreading step of spreading the granite soil on the playground surface after the paving step; a compaction step of compacting the granite soil by using a roller after the spreading step; and a leveling step of leveling the granite soil after the compaction step. Therefore, by minimizing a time and manpower required for maintenance of the playground, maintenance efficiency and cost can be maximized.

Description

How to maintain the Masato playground

The present invention relates to a method for maintaining a Masato playground, and more specifically, it comprises any one or a plurality of mixtures selected from Masato, loess, sand, quicklime, gypsum, calcium chloride, light magnesia, and alumina. It is a technical field related to a masato composition and a playground maintenance method using the same.

In general, the surface material used in the playground is made of various materials such as clay, cayle, artificial turf, natural turf, and wood. Among them, clay is called a clay court and is typically used for tennis courts. Most of these clay coats are used so that the sand component is contained in mud or loess, and in special cases, grass or chemical coats using polyurethane or polyurea are used. As a recent development, a method in which a densely woven wire mesh is installed at regular intervals from the ground is being used.

However, in the case of the chemical coat, since excessive force is applied to the joints, muscles, and bones of the human body, its use is limited and equipment costs are high. In addition, in the case of a grass court, it is difficult to manage and requires a lot of facility cost, so it is difficult to use it except in special cases. On the other hand, the woven wire mesh has a problem in that it is difficult to use because the installation cost is high and the splashing phenomenon of the tennis ball is different from that of the general tennis court.

In addition, when artificial turf is used, since it uses chemical materials, it may deteriorate and be damaged by ultraviolet rays after 5 years of life, cause headaches or skin diseases, and accidents such as burns due to friction during a fall may occur. There is a problem in that environmental pollution may occur due to harmful substances.

In order to solve the above problems, a clay coat is mainly used, and the conventional clay coat is difficult to manage compared to a hard coat. This is because the clay coat must be pressed down with a roller periodically to maintain a flat surface, and moisture must be kept constant. Also, if a part is damaged, it is very cumbersome to repair it.

In particular, even if a part of the clay coat is damaged, a very large area must be lifted and repaired at a constant height, and accordingly, there is a problem in that the maintenance cost of the clay coat is increased and workability is deteriorated. Of course, only the damaged part can be repaired, but this makes it difficult to maintain the uniformity of the clay coat surface. For example, if only a damaged part of the coat is repaired, the water draining characteristics of that part or the amount of cushion are different from those of other adjacent parts, resulting in a problem in that the quality is deteriorated.

Republic of Korea Patent Registration No. 10-1165561 (July 06, 2012)

The present invention is a technology devised to solve the problems according to the above-described prior art, which can reduce the time required for the maintenance of the conventional playground, reduce the replacement cost due to the long replacement cycle, and reduce environmental pollution caused by harmful substances. The purpose of this is to provide a maintenance method for Masato Stadium.

The present invention in order to realize the desired object as described above, the present invention is a surface cleaning step of arranging the surface of the playground; After the surface cleaning step, a surface leveling step of leveling the surface of the playground using a leveler; After the surface flattening step, the disbursing step of discharging the mass on the playground, after the discharging step, the spreading step of spreading the massato on the surface of the playground; After the spreading step, it is characterized in that it comprises a compaction step of compacting the massato using a roller, and a flattening step of flattening the massato using a ground clear after the compaction step.

In addition, the surface cleaning step of the present invention is characterized in that it comprises a weed removal step of removing weeds using a planarizer.

In addition, the flatter is a front frame and a side frame is coupled, the rear body portion is coupled to the roller; a connection part coupled to the front frame of the body part and coupled to a moving device for pulling the body part; a flat part connected to the body part by a chain or a rope from the inside front of the body part, and flattening the ground by scraping the protrusion of the ground; and a collecting unit connected to the main body by a chain or a rope at the inner rear of the main body, and separating foreign substances contained in the soil moved backward through the flat part; It is characterized by using a planarizer composed of

In addition, the collecting unit is characterized in that it uses a planarizer comprising any one filter selected from a general filter and a mesh filter.

In addition, the surface leveling step of the present invention is characterized in that the surface of the playground is flattened by a depth of 1 to 20 cm using a leveler.

In addition, the spreading step of the present invention is characterized by spreading the Masato composition to a thickness of 1 to 20 cm on the surface of the playground.

In addition, the compaction step of the present invention is characterized in that using a vibrating roller to compact the massato for 1 to 30 minutes.

In addition, the compaction step of the present invention is a first compaction step of compacting the massato using a vibration roller of 40 to 60 Hz; It is characterized in that it is configured to include a second compaction step of compacting the massato using a vibrating roller of 61 to 80 Hz.

The Masato playground maintenance method according to the present invention presented as described above is a surface cleaning step of arranging the surface of the playground, and after the surface cleaning step, the surface leveling step of making the surface of the playground flat and the surface leveling step, After the laying step of laying and the laying step, after the spreading step of spreading the massato on the surface of the playground and the spreading step, the compaction step of compacting the massato using a roller and the flattening step of flattening the massato after the compaction step. Accordingly, maintenance efficiency and cost can be maximized by minimizing the time and manpower required for maintenance.

1 is a flowchart showing a Masato playground maintenance method according to a preferred embodiment of the present invention.
2 is a perspective view showing a planarizer according to a preferred embodiment of the present invention.
Figure 3 is a side view (a) showing the state before using the planarizer according to a preferred embodiment of the present invention, and a side view (b) showing the state after using the planarizer.
4 is a perspective view (a) and a perspective view (b) of a mesh filter showing a general filter according to a preferred embodiment of the present invention.
5 is a perspective view showing a mesh filter according to another embodiment of the present invention.

Hereinafter, the Masato playground maintenance method according to the present invention will be described in more detail by way of Examples and Comparative Examples. However, the embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art.

Therefore, the present invention is not limited to the embodiments presented below and may be embodied in other forms, and the embodiments presented below are only described to clarify the spirit of the present invention, and the present invention is not limited thereto.

At this time, unless there are other definitions in the technical terms and scientific terms used, it has a meaning commonly understood by a person of ordinary skill in the art to which this invention belongs, and in the following description, it may unnecessarily obscure the subject matter of the present invention. A description of possible known functions and configurations will be omitted.

Also, the singular forms used in the specification and appended claims may also be intended to include the plural forms unless the context specifically dictates otherwise.

In addition, the drawings introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Therefore, the present invention is not limited to the drawings presented below and may be embodied in other forms, and the drawings presented below may be exaggerated to clarify the spirit of the present invention. Also, like reference numerals refer to like elements throughout.

Also, the singular forms used in the specification and appended claims may also be intended to include the plural forms unless the context specifically dictates otherwise.

In describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is formed between each component. It should be understood that elements may also be “connected,” “coupled,” or “connected.”

First, the equipment used in the Masato playground maintenance method of the present invention may use a 1-ton truck, a four-wheeled motorcycle (ATV), a motor grader, a vibrating roller, an excavator, a ski loader, a dump truck, and a leveling machine. It is not limited thereto, and general equipment used in civil engineering, construction, and construction sites may be used.

The 1-ton truck is used for transporting a ground clear, four-wheeled motorcycle, and other equipment used for maintenance of the Masato playground, or towing a leveling machine (eg, ground clear).

The four-wheeled motorcycle is used for work by towing a flatter (eg, ground clear) to the four-wheeled motorcycle when a 1-ton truck cannot be used depending on the conditions of the playground.

The motor grader refers to a machine that is used for cutting and siding on slopes by attaching blades capable of arbitrary motions such as up and down, left and right, and ash, etc. between the front and rear wheels of a tire, flattening the ground, and cutting, siding, etc., in the present invention. It is used for spreading the laid mass and leveling the surface of the playground.

The vibrating roller refers to a machine for compacting the ground by attaching a starting device to the front and rear wheels of a tire, and giving its own weight and vibration according to vibrating iron wheels. do.

The excavator refers to a machine used in civil engineering, construction, excavation work to dig the ground at a construction site, loading work to transport soil, shredding work to dismantle buildings, and stationary work to clean the ground. Used for unfolding.

The ski loader is manufactured to be smaller and lighter than the wheel loader generally used, and is mainly used at small-scale construction sites, and is used for loading and unloading aggregates, mining work, transport, etc. It is used for work and the work of spreading the mass laid on the playground.

The dump truck is a kind of cargo vehicle equipped with a loading box, and refers to a machine capable of automatically unloading loads (soil, aggregate, etc.) by tilting the loading box with power, and is used in the present invention to transport massato.

Hereinafter, as shown in FIG. 1, a detailed look at the playground maintenance method using the Masato composition as described above is as follows.

After the surface cleaning step (S10) and the surface cleaning step (S10) for cleaning the surface of the playground, the surface leveling step (S20) and the surface leveling step (S20) for leveling the surface of the playground using a planer After the laying step (S30) and the laying step (S30) of installing the massato, the spreading step (S40) of spreading the massato on the surface of the playground and the spreading step (S40), the compaction step of compacting the massato using a roller (S50) And after the compaction step (S50), it is configured to include a planarization step (S60) of leveling the massato using a ground clear.

Specifically, in the surface cleaning step (S10), the existing installations, line points, line markers, etc. installed in the playground are first removed, and then, as shown in FIG. 2, a weed removal step of removing weeds using a ground clear. (S11) may be included.

In the weed removal step (S11), weeds can be more easily removed using a flatter to which a mesh is attached, but the present invention is not limited thereto. can

In the surface leveling step (S20), the surface of the playground is completely flattened by using a leveler to prepare for the laying of massato.

In addition, the surface flattening step (S20) makes the surface of the playground flat by setting the height of the flat portion by 1 to 20 cm depth (H1) of the surface of the playground.

The installation step (S30) is to install the massato on the surface of the playground flattened after the surface flattening step (S20).

In the spreading step (S40), after the installing step (S30), the laid massato is evenly spread on the playground.

In addition, in the unfolding step (S40), it is preferable to spread the Masato to a thickness of 1 to 20 cm using a motor grader. When it is spread to an excess thickness, it is preferable to spread it to a thickness within the above range because the effect is not increased compared to the amount of Masato added, and only a cost increase may occur.

The compaction step (S50) is to flatten the massato using a roller, and in the spreading step (S40), the uneven surface of the massato evenly laid on the playground is pressed with a roller to make the surface even.

In addition, in the compaction step (S50), it is preferable to compact the massato for 1 minute to 30 minutes using a vibrating roller. If it is minced for more than a minute, a problem may occur that only the required construction time is increased, so it is preferable to mince the time within the above range.

The compaction step (S50) includes a first compaction step (S51) of compacting the massato using a vibration roller of 40 to 60 Hz and a second compaction step (S52) of compacting the massato using a vibration roller of 61 to 80 Hz. is composed by

In the first compaction step (S51), the massato is pressurized to even out using a first vibrating roller having a vibration intensity of 40 to 60 Hz.

The second compaction step (S52) uses a second vibration roller having a vibration intensity of 61 to 80 Hz and pressurizes the massato with a stronger vibration intensity than the first compaction step (S51) to evenly compact it once more.

In addition, after the compaction step (S50), the existing installations, line points, etc. are reinstalled in their original state to complete the maintenance work.

In addition, as shown in FIG. 2, the planar machine includes a body part 110 to which a front frame 111 and a side frame 112 are coupled, and a roller 113 to the rear side, the body part ( A connection part 120 coupled to the front frame 111 of 110 and coupled to a moving device for pulling the body part 110, the body part 110 and a chain or rope from the inner front of the body part 110 The flat part 130 for leveling the ground by scraping the protrusion of the ground, and the main body part 110 and the chain or rope from the inner rear side of the body part 110, and the flat part 130 is connected to the In the present invention, the planarizer configured including the collecting unit 140 for separating the foreign substances contained in the soil moved back through it can be towed and used by a moving means such as a 1-ton truck or a four-wheeled motorcycle.

As shown in FIGS. 2 to 3, the planarizer is agglomerated on the surface of the playground by using the flat portion 130 provided with a plurality of '∧'-shaped or '['-shaped protrusions (not shown) protruding downward as shown in FIGS. The first thing to do is to crush the sand.

Second, only sand is discharged to the surface of the playground after removing foreign substances such as gravel, garbage, weeds, etc. included in the sand crushed and discharged through the flat portion 130 using the collecting unit 140 .

Third, the surface of the playground can be smoothed using the roller 113 located at the rear of the leveler, so that the time and manpower required for maintenance of the playground can be minimized, thereby reducing maintenance efficiency and cost.

That is, when the leveling machine is used, since sand crushing, foreign matter removal and roller work can be performed simultaneously, the time required for maintenance of the playground can be effectively reduced.

In addition, as shown in FIG. 4 , the collecting unit 140 is replaced with any one selected from the general filter 140-1 and the mesh filter 140-2 to remove foreign substances such as gravel, weeds, and garbage. It can be selected and used according to the environment or condition of the playground, so that customized work is possible.

The general filter 140-1 has a size of 5 mm to 20 mm, and is used to first remove large-sized foreign substances such as large stones, weeds, and garbage.

In addition, it is preferable that the general filter 140-1 has a size of 5 mm to 20 mm. If it is configured to be smaller than 5 mm, stones, weeds, and garbage are accumulated between the filters, so that foreign substances may not be properly filtered. And, if it is configured to be larger than 20 mm, a problem may occur that foreign substances escape into the filter hole, so it is preferable to be configured in a size within the above range.

The mesh filter 140-2 is configured in a size of 10 mm to 50 mm, and may be formed in at least one shape of a circular hole, a polygonal hole, an oval hole, and a square hole, and it is possible to remove fine foreign substances that are not filtered by the general filter. It is possible to further increase the efficiency of organizing the playground.

In addition, it is preferable that the mesh filter 140-2 has a size of 10 mm to 50 mm. When the size is less than 10 mm, sand with a small particle size is accumulated on the filter and foreign substances may not be properly removed, and 50 mm If it is configured to exceed, it is preferable to have a size within the above range because a problem may occur in that fine foreign substances cannot be removed.

On the other hand, the mesh filter 140-3 according to another embodiment of the present invention is

As shown in FIG. 5, the wire mesh 144 cut into a square shape, the round bar 145 hooked along the end side of the wire mesh 144 from one side or four sides of the wire mesh 144, and the wire mesh The round bar 145 by bolting one side end of (144) and the 'C'-shaped collecting part connector 146 for accommodating the round bar 145, and through both ends of the opening of the collecting part connector 146. ) may include a plurality of fixing bolts 147 for fixing to the inside of the collecting part connector (146).

In addition, the mesh filter 140-3 can separate foreign substances and sand well due to the configuration of the wire mesh 144 in the case of a playground where sand agglomeration is high due to high humidity, or a playground with high sand viscosity. can

The round bar 145 effectively distributes the force applied to the wire mesh 144 during the cleaning operation of the playground to prevent a failure that may occur during the flattening period when the force is concentrated.

On the other hand, the masato used for the maintenance of the granite refers to the soil produced by the weathering of granite, and in the process of weathering, chemical weathering of soil particles is small, plasticity is low, and the deterioration of the soil particles in the process of weathering is high. Although remarkable, it can be classified as a weathering mass with high hardness and low permeability.

The massato is easy to construct, inexpensive, and has good drainage and air permeability, so it is widely used for field crops, landscaping plants, wildflowers, bonsai, and flowerpots. It is broadly classified as a vaginal mage.

The white horse sand is a soil in a state similar to stone powder containing little clay or loess components, has a high oxygen content, has a soft surface that is not angled, and has excellent drainage properties.

Unlike white horses, the above-mentioned clay-mass is a mixture of clay or loess. It is generally used for all crops. Depending on the content of loess, it is used for planting garden trees, nail beds, soil, paddy fields, clay soil, etc. It is widely used, and it is widely used because it does not need to be watered frequently due to its good function of latent moisture, and it is easy to float when planting garden trees.

In addition, the massato is preferably a mixture of the first massato having a particle size of 10 to 15mm, the second massato having a particle size of 5 to 9mm, and the third massato having a particle size of 1 to 4mm.

In addition, the first massato has good drainage properties and dries quickly after rain, the second massato has both good drainage and moisture retention properties, and the third massato has good moisture retention properties, which can reduce the occurrence of injuries such as abrasions. there is.

In addition, it is preferable to use a mixture of the first massato, the second massato, and the third massato in a ratio of 1:1:1 by weight. When the first massato is more than the second massato and the third massato, It is difficult to reduce the occurrence of injuries such as abrasions, and when the second mass is more than the first and third masses, both drainage and moisture retention properties are good, but it is not as good as the first massato and third mass, so many excellent When this occurs, the floor may become rough, and it is difficult to reduce injuries such as abrasions compared to the third mass, and if the third mass is more than the first and second masses, dust is generated and surface loss due to rain. It is preferable to use a mixed part by weight within the above range because there may be problems in that the playground is pitted or the floor is rough, causing discomfort in walking.

The mixture used for the maintenance of the Masato playground is composed of any one or a plurality selected from ocher, sand, quicklime, gypsum, calcium chloride, light magnesia, and alumina, and when mixed with the Masato, the strength and drainage of Masato , it can be used even after rain or snow by increasing its bearing capacity, durability and stability.

The yellow soil is a mixture of yellowish-brown and pale yellow fine sand and clay that is transported and deposited by the wind. It is loosely connected by calcium carbonate and is homogeneous and does not develop a layered layer, and the moisture content is 10 to 15%. It is low and has a particle size of 0.02 to 0.05 mm.

As the sand, various kinds of sand generally applied to the playground, such as natural sand and regenerated sand, may be used.

The natural sand has various colors such as dark yellow, white, black, and green, and refers to particles between 0.02 and 2 mm composed of small fragments of rocks and minerals distributed in the soil, and silicon dioxide is most abundant in the form of quartz. has been Since quartz is the most abundant compound of oxygen and silicon among elements constituting the earth's crust, it is widely distributed in nature, is chemically and structurally stable, has relatively high hardness compared to surrounding materials, and withstands weathering well.

The reclaimed sand refers to sand that has been re-used so that the sand used for dredged soil, waste soil sand, and waste casting sand among industrial wastes can be reused. It can be used that is put into a crusher and crushed to a size of 0.1 to 5 mm.

The quicklime (lime) is made by baking raw limestone stones collected in a natural state at 825 ° C. or higher for a long time and drying them so that only the lime component remains by blowing off carbon dioxide contained in the raw limestone stones, and contains a lot of carbonates, oxides, and hydroxides.

The calcium chloride is a chemical substance produced by the reaction of calcium carbonate and dilute hydrochloric acid. It is a solid at room temperature, dissolves well in water, and has strong deliquescent properties to absorb moisture well.

The light-burned magnesia refers to powdered magnesium oxide having a high surface area and chemical reactivity made by calcining magnesium carbonate or magnesium hydroxide at a low temperature, and is used for agriculture, environmental treatment, catalysts and chemicals. It is used in various ways.

The alumina is an oxide of aluminum, and it is in the form of white powder with excellent mechanical strength, heat resistance, corrosion resistance, abrasion resistance, electrical insulation and chemical stability. It is widely used as an abrasive, refractory material, antacid, and adsorbent.

In addition, the mixture uses a powder form having a particle size of 0.01 to 15 mm, and when a mixture having a particle size of less than 0.01 mm is used, the amount of scattering in the air when mixing the mixture with Masato may increase, and dust A problem of increased occurrence may occur, and when a mixture having a particle size exceeding 15 mm is used, a problem of not being uniformly mixed with Masato may occur, so it is preferable to use a mixture having a particle size within the above range.

In addition, the mixture is preferably composed of a weight ratio of 1 to 1.5 massato: mixture 1 by weight. When the massato is mixed in less than 1 weight ratio, the unique characteristics of Masato may be reduced, and the massato exceeds 1.5 weight ratio When mixed together, there may be a problem that the characteristics of the mixture are deteriorated, so it is preferable to mix in a weight ratio within the above range.

More preferably, it is good to use a mixture in a weight ratio of Masato 1: Mixture 1.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the following examples are only examples for explaining preferred embodiments of the present invention, and the present invention is not limited by the following examples.

The method of measuring the physical properties of the specimens prepared in Examples and Comparative Examples and the specifications of the materials used are as follows.

(Specification)

The specifications of the material are shown in Table 1 below.

Specifications 1st Masato Average particle diameter 10 to 15 mm 2nd Masato Average particle diameter 5 to 9mm 3rd Masato Average particle diameter 1 to 4 mm ocher Average particle diameter 0.01 to 0.05mm quicklime Average particle diameter 0.1 to 1mm sand Average particle diameter 0.1 to 1mm gypsum Average particle diameter 0.1 to 1mm light magnesia Average particle diameter 0.1 to 1mm alumina Average particle diameter 0.1 to 1mm

(Measurement of compressive strength)

The experiment was conducted in accordance with KS F 2405 (concrete compressive strength test), and the average value was calculated by repeating measurements three times.

(Measurement of permeability (permeability coefficient))

The experiment was carried out according to KSF-2322 (soil permeability test), and the average value was calculated by repeating measurements three times.

(Examples 1 to 4 and Comparative Example 1)

The composition was added in a weight % shown in Table 2 below and mixed sufficiently to measure the physical properties of the specimen.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Masato 1st Masato 25 30 40 12 40 2nd Masato 25 30 12 40 30 3rd Masato 25 30 12 12 30 mixture ocher 5 2 6 6 quicklime 5 2 6 6 - sand 5 2 6 6 - gypsum 5 2 6 6 - light magnesia 2.5 One 6 6 - alumina 2.5 One 6 6 - Compressive strength (Mpa) 36.1 35.2 34.7 33.5 21.7 Pitcher (cm/sec) 6.07 X 10- ² 5.84 X 10- ² 5.38X 10- ² 5.19X 10- ² 4.87 X 10- ²

As shown in Table 2, it can be seen that the composition specimen prepared according to the present invention has superior compressive strength and water permeability compared to Comparative Example 1. Specifically, it was confirmed that Example 1, in which the first massato, the second massato, and the third massato and the mixture were equal to 25% by weight, had good compressive strength and permeability. However, in the case of Examples 2 to 4 in which the mixture was added less than that of Masato, it can be seen that the compressive strength and the water permeability decreased, so that it can be seen that the addition amount of Masato and the mixture should be adjusted in a certain range.

In addition, in the case of Comparative Example 1 in which the mixture of the composition was not added and only the first massato, the second massato, and the third massato were added, it can be seen that the compressive strength and water permeability decreased compared to Examples 1 to 4 It can be seen that the addition amount of the first massato, the second massato, the third massato, and the mixture must be adjusted within a certain range.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the claims below, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (8)

A surface cleaning step (S10) of cleaning the surface of the playground;
After the surface cleaning step (S10), a surface flattening step (S20) of making the surface of the playground flat;
After the surface leveling step (S20), a first massato having a particle size of 10 to 15 mm, a second massato having a particle size of 5 to 9 mm, and a third massato having a particle size of 1 to 4 mm were mixed in the playground 1: A laying step (S30) of installing any one or a plurality of mixtures selected from massato and sand, quicklime, gypsum, calcium chloride, light magnesia, and alumina mixed in a 1: 1 weight ratio;
After the installation step (S30), an unfolding step (S40) of spreading the massato on the surface of the playground;
After the spreading step (S40), a compaction step (S50) of compacting the massato using a roller;
After the compaction step (S50), the planarization step (S60) of leveling the masato; is configured to include,
The surface cleaning step (S10) is,
It is configured to include; a weed removal step (S11) of removing weeds using a flattener,
The compaction step (S50) is,
It is characterized in that the massato is minced for 1 to 30 minutes using a vibrating roller,
The compaction step (S50) is,
The first compaction step (S51) of compacting the massato using a vibration roller of 40 to 60 Hz; and
A second compaction step (S52) of compacting Masato using a vibrating roller of 61 to 80 Hz; Masato playground maintenance method comprising the.

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