KR100477875B1 - Paving Composition for Sports Complex Courts Using Inorganic Compounds - Google Patents

Abstract

Sports facilities coat packaging material containing a mineral material of the present invention as a main ingredient (Superclay) is a calcium compound, magnesium compound, aluminum compound as a main component and pulverized them to a certain size, mixed with salt and soil to the athletic facility coat To provide a surface packaging material. More specifically, calcium compounds include quicklime (CaO), gypsum (CaSO ₄ ) and calcium chloride (Ca Cl ₂ ), magnesium oxide is light magnesium (MgO + nH ₂ O), and aluminum oxide is alumina (Al ₂ O _3). 4-7% of the mixture, and 0.1-0.5% of salt, are mixed with soil (SiO ₂ ) that passed through a natural soil particle size of 4.75 mm (№.4). After supplying water by voltage molding, the hydration reaction with minerals increases the hardness and the absorbent power, thereby making it a surface packaging material for all-weather sports facilities coats to maintain the required humidity. Accordingly, the coat packaging material of the present invention is a sports equipment dedicated coat packaging material of a radically different dimension from the existing cra coat and cement-based hardener.

The finishing material for the coat packaging of the present invention can provide a sports facility cray coat packaging material having excellent elastic resilience and good moisturizing property because it exhibits an ideal hardness that is well drained even after raining, and does not swell.

Description

Paving Composition for Sports Complex Courts Using Inorganic Compounds}

Sports facilities coat packaging material containing the inorganic material of the present invention aka Superclay is a salt and soil (KSF) by passing these inorganic materials containing calcium compounds, magnesium compounds, aluminum compounds in the 0.01 ~ 0.5 mesh size Mixed with 2324, classified as ML or CL), to provide surface packaging for athletic coats. More specifically, the present invention relates to a court pavement material suitable for the surface pavement of the outdoor sports facility courts such as tennis courts, basketball courts, volleyball courts, badminton, other sports fields, and the like, and to a method of packing the all-weather sports facilities using the same.

In general, an outdoor sports facility coat mainly uses a clay system based on natural soil, which is divided into a cross section of a multi-layer structure, as shown in FIG. The surface layer mixed with such soil and slaked lime has the following problems. First, after precipitation, the coat has a high moisture content, so it becomes a soft ground, and it is impossible to play for a long time due to its slack and low drainage. Second, due to the low bonding strength between soil particles and weak hardness, continuous voltage is required and cumbersome maintenance is necessary. Third, unevenness occurs due to freezing in winter, so the surface of the coat is uneven, and scattering dust is generated due to abrasion of the coat during drying in summer, resulting in poor environmental conditions. Fourth, unevenness occurs due to crack ground subsidence of the court surface, and the bounding of the ball is not constant, which adversely affects the performance improvement.

In the related art related to the present invention, Japanese Patent Publication No. 61-31518 relates to a composition for clay coat in which quicklime, fly ash and cationic asphalt emulsion are added to soil in order to improve soil drainage. Korean Patent Publication No. 334,229 relates to a tennis court composition composed of 5% to 25% of binder composition consisting of 30% to 70% of quicklime and 95% to 75% of natural stone to enhance durability. In addition, Japanese Patent Application Laid-open No. Hei 4-81493 relates to a soil improving agent for tennis court to which iron oxide, zinc oxide and alumina are added, and Japanese Patent Laid-Open Publication No. Hei 5-32969 relates to iron oxide, alumina and polyacrylic acid. The present invention relates to a soil hardening agent having a main component. In addition, Korean Patent Publication No. 1998-43021 discloses soil concrete for high strength and hardening with the addition of calcium sulfoaluminate, clinker, portland cement, lime, gypsum and reaction accelerators as additives for soil concrete. It is about. However, they are similar to the present invention in that they use quicklime, alumina, and gypsum, respectively, but Japanese Patent Application Laid-Open No. 61-31518 refers to soil drainage and Japanese Patent Application Laid-open No. 4-81493 for tennis court soil. The purpose of the improver (土壤 改良 건조) is that the coat is easily dried in the dryer or dry season, the moisture is lost, there is a problem that the cracks occur, the dust is scattered by the drying of the surface layer. In addition, European Patent Publication No. 334,229 is durable, Japanese Patent Application Laid-open No. Hei 5-32969 is a soil hardener, and Korean Patent Publication No. 1998-43021 has high strength and properties. Its purpose is to harden soil concrete, and the surface layer is easily dried and the coat is so hard that it causes not only the joints of athletes, but also the stress on the body due to friction between the coat and the body during exercise. . Therefore, these prior arts have poor drainage and poor moisture retention, so that the coat surface is easily dried and dust is generated, and if the durability is good, the coat is too tight and the elasticity of the ball is excessively increased. It has been the cause of giving.

As described above, the present invention differs from the prior art in that it is intended, and is another invention in which the components and the effects are different.

The present invention was created in order to solve the complex problems such as moisture retention, drainage, durability and elasticity of the conventional sports facilities coat at one time, has the following object.

First, it provides all-weather coat packaging for sports facilities with excellent drainage, excellent hardness and good bound even after rain. Second, since it maintains strong water absorption and hardness even after rainfall, it provides a sports facility coat that is easy to maintain during the rainy season. Third, because the court is excellent in elasticity, the bound of the ball is constant, it is possible to improve the performance. Fourth, maintenance is easy because it is not affected by freezing and high temperature caused by seasonal changes. Fifth, the inorganic reaction of the developing soil can maintain a coat free from cracks due to porosity, absorbency, and durability. Sixth, as a quasi-weather coat packaging material, it is natural, environmentally friendly, and economically excellent with 33% construction cost of chemical-based coats.

In addition, although the conventional coat has four stages, such as the lower layer (A), the middle layer (B), the lower surface layer (C-1) and the upper surface layer (C-2), the present invention provides the lower surface layer (C-1) and the upper layer. Since the surface layer (C-2) is formed in one single layer, the construction is easy and the purpose is to shorten the air.

The coat surface packaging material of the present invention is the most ideal as a sports equipment cray coat packaging material by agglomerating soil particles and completing voltage and molding, and as a sports equipment coat packaging material having a fundamentally different dimension from a conventional cra coat or cement hardener. When these coat pavements are mixed with water, the hardness and absorbency become stronger by reacting with the moisture of the soil, and the voltage pavement is formed by the voltage molding.

1) Calcium Compounds

CaO + H ₂ O → Ca (OH) ₂

By this hydration reaction, 1 kg of CaO is hydrated to change to Ca (OH) ₂ , whereby approximately 320 g is solidified and the water content of the soil is lowered. In addition, when 1 kg of CaO is hydrated and converted into Ca (OH) ₂ by the exothermic reaction, about 280 kW of heat is released. The temperature rise due to this exotherm promotes the chemical reaction of the mixed soil, and the specific gravity of CaO decreases from 3.4 (CaO) to 2.24 (Ca (OH) ₂ ) by hydration, but the volume increases about 50%. This volume expansion occurs in a relatively short period of time and the surrounding soil is compressed by this expansion. Accordingly, a strong suction action occurs due to the hydration reaction of CaO, and by this action is forced dehydration from the soil to increase the strength of the soil. On the other hand, some of the lime to produce calcium carbonate (CaCO ₃ ) by the carbonic acid or carbon dioxide contained in the soil.

Ca (OH) ₂ + CO ₂ → CaCO ₃ + H ₂ O

The clay particles in the soil are fine particles of several micrometers or less, and the surface of them

It is negatively charged, and hydrogen ions (H ⁺ ), sodium ions (N ⁺ ), potassium ions (Ka ⁺ )

Cations and polarized water molecules (H-OH) are attached.

Gypsum (CaSO ₄ ) uses anhydrous calcium sulfate to form crystalline water (hydrate) when combined with soil moisture to improve moisture retention and drainage.

CaSO ₄ + H ₂ O → CaSO ₄ ㆍ nH ₂ O

Calcium chloride (CaCl ₂ ) is combined with the water of the soil, causing a strong exothermic reaction, calcium hydroxide is formed and serves to evaporate the water when it rains to increase the bond strength of the soil.

(CaCl ₂ ) + nH ₂ O → Ca (OH) ₂ + nHCl

2) Magnesium Compound

Small magnesium is anhydrous magnesium oxide which removes moisture by heat-treating magnesium oxide, and when combined with moisture in soil, it becomes magnesium hydroxide and starts initial hardening to form a gel field. In addition, magnesium hydroxide reacts with phosphoric acid in the soil or carbon dioxide gas in the air, and becomes magnesium phosphate and basic magnesium carbonate to increase strength.

MgO + nH ₂ O → Mg (OH) ₂ ㆍ nH ₂ O

3) Aluminum compound

Alumina is anhydrous aluminum oxide (Al ₂ O ₃ ) obtained by heat treatment, mainly high purity alumina of α-Al ₂ O _3. The average particle size of powder is 1μm ~ 5μm. When used as a finishing packaging material by mixing the coat not only prevents cracking of the coat, but also combines with moisture in the soil to form magnesium hydroxide to form a stable gel to improve moisture retention.

Al ₂ O ₃ + H ₂ O → Al (OH) ₃

4) For salt

Salt (NaCl) combines with the moisture of the soil to maintain a constant moisturizing power to provide a constant moisture to the coat even in the dryer or dry season, and also prevents the inflow of moisture from the topsoil below the surface when it rains. It also plays a good role in maintaining the moisture and elasticity of the soil.

NaCl + H ₂ O → NaCl, nH ₂ O

As such, when inorganic ions such as Na ⁺ , Ca ²⁺ , Mg ²⁺ , and Al ³⁺ are added to the soil (SiO ₂ ), ion exchange reactions occur rapidly, and these oxides (NaO, CaO, MgO, Al ₂ O ₃ ) The inorganic ions produced by the dissolution of sorbate onto the clay particle surface. This adsorption causes soil particles to agglomerate, granulate, and change soil. These changes in Saturn increase the strength, increase the resistance to compression, and increase the stability of the soil structure against moisture. And SiO _2, Ca (OH) _2, Mg (OH) _2, nH ₂ O and The mineral reaction proceeds over a long period of time, increasing the strength and durability of the soil. Since these compounds have a binding water, they maintain a constant moisture in the soil, thereby maintaining the coat's moisture retention.

<Example>

An example applied to a tennis court in a sports facility court using a court surface pavement according to the present invention will be described.

Calcium oxide (CaO), gypsum (CaSO ₄ ), calcium chloride (CaCl ₂ ) as a calcium compound, light magnesium (MgO + nH ₂ O) as a magnesium compound, and alumina (Al ₂ O ₃ ) as an aluminum compound are used and the same weight ratio 4 to 7% and 0.1 to 0.5% of the mixture obtained by crushing the mixed inorganic materials to 0.01 to 0.5 mesh size with respect to 100% by weight of the total coat surface packaging material.

In addition, 93 to 95.9% of natural soil (SiO ₂ ) which passed through 4.75 ㎜ (№.4) was added and mixed, and then the lower layer, middle layer, surface layer and surface layer were previously formed in a multi-layered structure on the ground. When the surface of the coat surface of the present invention is applied to the thickness of 80 to 150 mm on the ground of the athletic facility coat, and the water is sprayed with sufficient water so that the water content of the soil is 9 to 12%, an inorganic hydration reaction occurs and the surface of the coat has good drainage and durability. High strength and rapid curing are achieved.

Referring to Figure 2, it is a structure in which the lower layer (A), the middle layer (B) and the surface layer (D) is sequentially stacked on the ground so that the ground has a constant supporting force so that settlement does not occur after construction.

Therefore, the conventional coat has two layers, the lower surface layer (C-1) and the upper surface layer (C-2), whereas the present invention is composed of a single layer surface layer (D) by replacing the lower surface layer and the upper surface layer with one. Even good tennis courts can be provided.

<Construction example>

As shown in Fig. 2, the lower layer (A), the middle layer (B), the surface layer (E), and the surface layer (F) are sequentially stacked on the ground so as to have a constant supporting force so that settlement of the ground does not occur even after construction. The lower layer (A) has a gap to sufficiently transfer the load of gravel to the ground and to quickly drain the water penetrated from the middle layer (B), and has a thickness of about 100 mm. The middle layer (B) is a soil classified as SM or SC by KSF 2324. In order to facilitate drainage, refined stone powder or soil with good permeability is used during the use. It is -15%, the main component content is 20-50%, the maximum particle diameter is 10-20%, and the thickness of a middle layer is constructed by about 100 mm. The middle layer facilitates the buffering effect of transferring the load of the surface layer to the lower layer, and facilitates the permeation of water penetrated from the surface layer, and also serves to supply moisture by capillary phenomenon during drying of the surface layer (D).

And the surface layer (D) is a packaging material for the coating surface layer as in Example 1, calcium oxide (CaO), light magnesium (MgO + nH ₂ O), calcium chloride (CaCl ₂ ), gypsum (CaSO ₄ ), alumina (Al ₂ O ₃ ) And soil (SiO ₂ ) passed through 4.77M / M (№4 houses) classified as ML or CL by KSF 2324, and salt (N aCl) is transferred directly to the coat and the surface wear / To be able to withstand the erosion, etc., approximately 80 ~ 120㎜ thickness, and then sprayed with water to form a voltage. Sand for surface treatment is a homogeneous, impurity-free material that has passed through 2M / M (No. 1) and is brushed after laying 0.001m ³ / m ² . Compaction is done with a roller of 1-3 tons to keep smooth.

The composition for coating coat of the inorganic coating thus formed serves to densify the soil, increase or increase the strength and combine with moisture in the soil to produce soil agglomeration.

<Test Example>

The uniaxial compressive strength and the coefficient of permeability were tested by KSF-2314 and KSF-2322 for the coat surface packaging material and general clay of the present invention. Triaxial compression test specimens were fabricated by applying 90% of the maximum dry density obtained from compaction density test.In case of applying saturated water content, the specimens were demoulded in mold after 30 minutes and then each specimen was 30 minutes, 60 minutes, 90 minutes. Uniaxial compressive strength was calculated as a triaxial compression test (drainage condition) after air curing for 5 minutes.

Permeability test specimens were fabricated with 90% of the maximum dry density obtained from compaction test. The specimen was prepared by using a dried sample in a mold for permeation test, completely saturated, and then cured in a wet state for 48 hours. The results are shown in Table 1 below.

Table 1. Uniaxial compressive strength and permeability coefficient (unit: compressive strength; kgf / cm ² , permeability coefficient; cm / sec)

Sample Classification General Masato The present invention Compressive strength Permeability coefficient Compressive strength Permeability coefficient Water content: 10.2%, 1 7.06 4.92 × 10 ^-2 25.32 5.46 × 10 ^-1 Water content 10.2%, 2 6.45 Same as above 17.35 Same as above Water content 10.2%, 3 5.50 Same as above 21.35 Same as above Saturated sample, 30 minutes after demolding 2.30 Same as above 8.28 Same as above Saturated sample, 60 minutes after demolding 2.58 Same as above 8.38 Same as above Saturated sample, 90 minutes after demolding 2.56 Same as above 9.90 Same as above

From the above results, it can be seen that the coating material for the coat surface layer of the present invention has an excellent compressive strength of 400% or more and a permeability coefficient of 200% or more as compared to a general cray coat.

First, the coat of the sports facility using the inorganic material prepared as described above; Soil is solidified after precipitation due to mineral hydration, avoiding soft ground and having excellent durability. second; The absorption is excellent by the suction action, so drainage is improved, so you can play sports immediately after the rainfall. third; Moisture retention is maintained by the ion exchange reaction and the strength is increased, resulting in excellent elasticity of the coat. fourth; As it uses natural mineral materials, it is environmentally friendly, does not cause cracks and ground subsidence, minimizes the injury of the athlete, and improves the performance by excellent elastic resilience. fifth; Maintenance is easy due to increased durability regardless of season.

1 is a cross sectional surface view of a conventional clay coat.

2 is a cross-sectional view of a coat using the coat packaging material of the present invention.

<Description of the code | symbol about the principal part of drawing>

A ........ lower layer C-2 ... upper surface layer

B ........ Middle layer D ..... Coat packaging material of the present invention

C-1 ... Bottom Surface E ..... Surface Treatment

Claims (3)

In a multi-layered athletic facility coat in which ground, lower, middle, and surface layers are formed sequentially, calcium oxide (CaO), calcium chloride (CaCl ₂ ), gypsum (CaSO ₄ ), and alumina (Al ₂ O) based on 100% by weight of the surface layer ₃ ) Soil (SiO ₂ ) 93-96 which passed through 4-7% by weight of inorganic material of 0.01-0.5 mesh size and 4.75 mm (No. 4), mixed and ground with small and medium magnesia (MgO.nH ₂ O). It is composed of an inorganic material composed of a weight percent and salt of 0.1 to 0.5% by weight, and a composition formed so as to have a thickness of 80 to 150 mm at an upper layer and a water content of 9 to 12% by weight. Athletic Facility Court Packing Materials delete delete