Mud-eliminating material, manufacturing method thereof and mud-eliminating method

Abstract

To provide a mud-eliminating material with high water absorption, excellent water binding power and easy workability in soil-based pavement of outdoor sports facilities such as grounds, a manufacturing method thereof and a mud-eliminating method.SOLUTION: This invention pertains to a mud-eliminating material that contains 90 wt.% or more of a porous body with a content of particles with a particle diameter of 5 mm or less of 90 wt.% or more and an effective porosity of 15 wt.% or more. This invention also pertains to a mud-eliminating method for laying the mud-eliminating material by spreading it on the surface of an earthen pavement where there is mud already or on the ground with puddles.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a muddy-climate eliminating material that quickly eliminates impediments to use caused by muddy soil on the paved surfaces of outdoor sports facilities, etc., and to a method for manufacturing the same and a method for eliminating muddy soil.

[0002] In sports facilities with earth-based pavement surfaces such as sports grounds, if puddles form due to rainfall or if the ground becomes extremely muddy after rainfall, it becomes difficult to use the ground (called usability problems). Such usability problems require the water to be removed and the ground to be restored as soon as possible. Traditionally, river sand or mountain sand has been used to repair muddy soil pavement. However, this sand is simply used to fill the mud, and because it has poor water absorption, moisture remains on the ground even after filling, and it is not effective enough in eliminating usability problems.

[0003] There are several known documents related to solving such problems in using grounds. For example, Patent Document 1 discloses water-absorbing soil for ground repair, which is made by crushing porous fired soil particles into small particles and mixing them with sand (claim 1). This document also discloses water-absorbing soil for ground repair, which is made by crushing fired soil particles containing about 90% silicic acid into flat plates and mixing the porous material composed of these fired soil particles with sand (claim 3). It is also described that these water-absorbing soil for ground repair are made by mixing the porous fired soil particles or porous material with sand in a ratio of 3:7 (claims 2 and 4).

[0004] This document lists as examples of porous materials natural calcined soil often found in volcanic regions and soil obtained by artificial calcination (paragraph 0010), but does not disclose the particle size or other physical properties of the porous materials. Furthermore, this document states that a mixture of porous material and sand in a 1:1 ratio is sufficient, but that it is difficult to mix uniformly at this ratio, and that a mixture of porous material and sand in a 3:7 ratio can be easily mixed and produces absorbent soil that is capable of sufficient water absorption (paragraph 0011).

[0005] Patent Document 2 discloses a paving composition containing a porous body with a particle size of 10 mm or less and a cement-based solidifying agent (abstract). Furthermore, this document describes that the cement-based solidifying agent is blast furnace cement containing blast furnace slag (claim 3), and that the paving composition is spread evenly on the ground and watered (claim 4).

[0006] Patent Document 3 discloses a ground covering material containing steel slag obtained by crushing and classifying dewatered sludge and a hydraulic binder (abstract, claim 1). This document further describes that the hydraulic binder is selected from blast furnace slag, etc. (claim 2), and that the dewatered sludge is generated in the process of producing sand and / or gravel from dredged river soil (claim 3). This document also describes that the ground covering material has an appropriate moisture content and particle size distribution derived from the dewatered sludge, so it can be applied simply by spreading it evenly on the ground and compacting it, and there is no need to sprinkle water (paragraph 0013). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 2840545 [Patent Document 2] JP 2022-178856 A [Patent Document 3] JP 2023-028966 A Summary of the Invention [Problem to be solved by the invention]

[0008] In the technology of Patent Document 1, 70% of the total volume of sand is mixed and used as the ground repair water-absorbing soil, so the water absorption is poor and sufficient repair effect against muddy areas cannot be obtained. In addition, the porous material of this document contains a large amount of silicic acid (i.e., silica) at 90% by weight. Silica reacts with water to become a hydrate, which solidifies the porous material, but the porous material of this document is mostly silica and lacks other components, so the solidification force between the porous bodies is weak with only silica hydrate, and from this point of view, it is difficult to obtain a sufficient repair effect. In addition, the material containing 90% silicic acid is a calcined diatomaceous earth product, which is calcined at a temperature of around 1000°C. For this reason, the hardness of the porous material of this document is low and it is easily crushed by tread pressure. For this reason, the pores of the porous material decrease during use, and the water retention capacity decreases. Furthermore, in this document, the particle size of the porous material is not selected, but is simply crushed, so the particle size is uneven and varies widely. Therefore, the water absorption effect of the porous material is unstable and cannot be predicted. Furthermore, if the particle size is not selected, the water absorption cannot be controlled, and the expected repair effect cannot be obtained. Furthermore, since the porous material is not selected, if there are a large number of ineffective pores (pores that are closed and not connected to the outside, and are not useful for absorbing water), water is not easily absorbed, making it difficult to achieve a repair effect. Furthermore, in this document, the porous material is mixed in only 30% of the total volume, which also makes it difficult to obtain a repair effect.

[0009] On the other hand, the technology disclosed in Patent Document 2 and Patent Document 3 aims to form a hard pavement surface like asphalt, and is not used for repairing mud. Furthermore, Patent Document 2 requires watering for solidification using a cement-based solidification material, whereas Patent Document 3 describes that watering is not necessary because there is moisture derived from the dewatered sludge. None of the technologies in these documents uses the moisture in the mud to solidify, and for this reason, it is not anticipated that these technologies will be applied to mud.

[0010] In view of the above, an object of the present invention is to provide a muddy-climate eliminating material that has a high water absorption rate, excellent water-binding power, and is easy to use, as well as a method for producing the same and a method for eliminating muddy-climate. [Means for solving the problem]

[0011] The present inventors have conducted extensive research to solve the above problems. As a result, they have discovered that muddy soil can be instantly eliminated by using a high proportion of porous materials with a specific particle size and effective porosity, and have completed the present invention. The present invention is as follows.

[0012] [1] The first invention is a mud-eliminating material, which contains 90% or more by weight of a porous body having a particle content of 90% or more by weight of particles having a particle diameter of 5 mm or less and an effective porosity of 15% or more by weight.

[0013] In this way, the muddy-climbing material of the present invention is composed mainly of fine particles with a small particle diameter, so the specific surface area of ​​the particles is large, and the effective porosity of the porous body is therefore high. This allows water from muddy areas or puddles to be adsorbed into the pores of the porous body or held between the particles, and since the adsorbed water is restrained, the water in the pores of the porous body is less likely to move even under external pressure, so muddy pavement surfaces can be instantly eliminated. In addition, by selecting porous bodies with a particle size of 5 mm or less, it is possible to eliminate unevenness and variation in the particle size of the porous bodies. Also, by selecting by particle size, it is possible to secure porous bodies with a stable specific surface area, which contributes to improving the water absorption effect. By selecting porous bodies with a selected particle size that can exhibit a water absorption effect of nearly 100% by measuring the effective porosity, it is possible to minimize the number of porous bodies that contain a large amount of ineffective pores. By ensuring the maximum amount of effective pores even among porous bodies with the same particle size, it is possible to eliminate particle size variation, stabilize the water absorption rate, and increase the water absorption effect. By using more than 90% of such porous material, it is expected that the water absorption effect will be further improved.

[0014] [2] The second invention is the muddying material of the first invention, which contains 0.5% by weight to 1.5% by weight of an acidic pH adjuster.

[0015] In this way, since the present invention contains an acidic pH adjuster, it is possible to neutralize a porous body with a high pH (i.e., alkaline), and prevent it from adversely affecting the surrounding environment.

[0016] [3] The third invention is the mud eliminator according to the second invention, wherein the acidic pH adjuster is selected from the group consisting of iron sulfate (II), aluminum sulfate, anhydrous potassium aluminum sulfate, and polyaluminum chloride.

[0017] In this way, in the present invention, the acidic pH adjuster is selected from iron (II) sulfate and the like, and in addition to neutralizing the porous body, these easily form hydrates, and therefore absorb moisture from the mud, thereby contributing to eliminating the mud.

[0018] [4] The fourth invention is the muddy-dispersing material according to the first invention, wherein the porous body is selected from the group consisting of waste molten slag, blast furnace slag, and clinker ash.

[0019] In this way, in the present invention, the porous material contains not only silica but also lime and alumina, so it can be solidified like cement by hydration and eliminate the mud. Also, waste molten slag, blast furnace slag, etc. are fired at a melting temperature of 1,300℃ to 1,500℃, so they have high hardness (mineral solid solutions of melilite (Ca2Al2Si2O7 (gehlenite) - Ca2MgSiO2O7 (akermanite)) are formed in some parts), and the pores are unlikely to collapse even after being laid in the mud, so the water absorption effect is sustained.

[0020] [5] The fifth invention is a method for producing the muddy water eliminator according to the first invention, A step of selecting the raw material of the porous body so that 90% by weight of the raw material contains particles having a particle diameter of 5 mm or less; and a step of selecting the porous body after the selection so that the effective porosity of the porous body after the selection is 15% by weight or more.

[0021] In this way, in the present invention, by selecting the raw material of the porous body based on its particle size and effective porosity, it is possible to manufacture a muddy water eliminator suitable for eliminating mud.

[0022] [6] The sixth invention is a method for eliminating mud, in which a mud-eliminating material according to any one of the first to fourth inventions is spread and laid on the pavement surface of an earth-based pavement where mud has occurred or on the ground where a puddle has occurred.

[0023] In this way, the present invention makes it possible to eliminate mud by the simple method of laying a mud-eliminating material on soil-based pavement where mud has occurred. Effect of the Invention

[0024] According to the present invention, it is possible to provide a muddy-climate eliminating material that has a high water absorption rate, excellent water-binding power, and is easy to work with, as well as a method for producing the same and a method for eliminating muddy-climate. [Brief description of the drawings]

[0025] [Figure 1]FIG. 2 is a diagram showing the results of a particle size test in Example 1. [Diagram 2] FIG. 1 shows the results of a particle size test in Example 2. [Diagram 3] FIG. 1 shows the results of a particle size test in Example 3. [Figure 4] FIG. 1 is a diagram showing the results of a particle size test in Comparative Example 1. [Diagram 5] FIG. 13 is a diagram showing the results of a particle size test in Comparative Example 2. [Figure 6] FIG. 13 is a diagram showing the results of a particle size test in Comparative Example 3. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following embodiments of the present invention are merely examples of the present invention and are not intended to limit the technical scope of the present invention.

[0027] 1. Mud-eliminating material The muddy water eliminator of the present invention contains 90% by weight or more of porous bodies having a particle content of 90% by weight or more of particles with a particle diameter of 5 mm or less and an effective porosity of 15% by weight or more.

[0028] The porous body is composed of a plurality of particles, each of which has a large number of holes. The porous body has a particle diameter of 5 mm or less at a content rate of 90% by weight or more, and is occupied by almost all particles of 5 mm or less. Here, the particle diameter means the diameter when the particle is assumed to be a sphere. In the present invention, the particle diameter can be measured by a method conforming to the sieving method (JIS A 1204) as described in the examples below. Specifically, the porous body is used as a sample, and a plurality of sieves (9.5 mm to 0.075 mm) with different mesh sizes are used, the weight of the particles that pass through them is measured, and the passing mass percentage can be calculated from the particle diameter accumulation curve.

[0029] The porous body contains 90% by weight or more of particles with a particle diameter of 5 mm or less, preferably 90% by weight or more of particles with a diameter of 3 mm or less, more preferably 90% by weight or more of particles with a diameter of 2 mm or less, and particularly preferably 40% by weight or more of particles with a diameter of 1 mm or less. If the particle diameter of the particles contained in the porous body is small, the specific surface area is large, so that the effective porosity of the porous body described below is high and the water absorption is likely to be good. In addition, if the particle diameter of the particles contained in the porous body is small, the dispersion of the particles in the mud is high and the porous body is likely to absorb water. Furthermore, if the particle diameter of the particles contained in the porous body is small, the surface becomes smooth when laid on a pavement surface, resulting in a good finish. There is no particular lower limit to the particle size contained in the porous body, but for general porous bodies, the lower limit is about 0.05 mm.

[0030] The porous body contains 90% by weight or more of particles with a particle diameter of 5 mm or less, and this content is preferably 95% by weight or more, more preferably 98.5% by weight or more, and particularly preferably 100% by weight. As such, since the amount of porous body contained in the muddy water eliminator is large, it has excellent water absorption and is more effective at eliminating muddy water than materials mixed with sand, such as those in Patent Document 1. Other components contained in the mud-eliminating material may be sand or soil, and acidic pH adjusters, which will be described later, are also preferred.

[0031] The porous body has an effective porosity of 15% by weight or more. Here, "effective porosity" means the ratio of gaps (voids) between particles through which water can flow, and can be measured by a method conforming to JIS A 1110 as described in the examples below. Specifically, the porous body is used as a sample, and the mass (A) of the sample in a surface-dried water-saturated state, the mass (B) of the sample in an absolute dry state, and the apparent mass (C) of the sample in water are measured according to JIS A1110. The effective porosity of the sample can be calculated based on these values ​​using the following formula. Effective porosity = (AB) / (AC) x 100 (%)

[0032] Effective porosity is also called "porosity", and the higher this value, the higher the water absorption rate of the porous body. This is because as the effective porosity increases, the volume of the pores increases, and the amount of water that can be absorbed into the pores increases. In addition, as the effective porosity increases, the specific surface area of ​​the particles that make up the porous body increases, so water is adsorbed on the surfaces of the fine particles, and the surface tension of the water binds the water to the walls of the pores, which is presumably why the water absorption rate increases. The effective porosity is 15% by weight or more, preferably 20% by weight or more, and more preferably 30% by weight or more. There is no particular upper limit to the effective porosity, but it is generally 90% by weight or less, and may be 80% by weight or less. When the effective porosity of the porous body is 15% by weight or more, there are sufficient gaps in the porous body, so that it can absorb the moisture in the mud and eliminate use problems.

[0033] The porous body is preferably one or more selected from the group consisting of waste molten slag, blast furnace slag, and clinker ash. Since these slags and clinker ash are classified as industrial waste, it is essential to use those whose safety has been confirmed. This is done by always selecting slag based on the Soil Contamination Countermeasures Act that came into force in 2003.

[0034] Waste molten slag is a solid material made by heating and melting waste incineration ash and the like to 1,300°C or higher. Waste molten slag generally contains, as its main components, 40-60% by weight of SiO2 (silicon dioxide = silica), 15-35% by weight of CaO (calcium oxide = lime), and 10-20% by weight of Al2O3 (aluminum oxide = alumina). Other components contained in waste molten slag include Fe2O3, Na2O, MgO, and P2O5.

[0035] Blast furnace slag is a type of iron and steel slag (slag) that is extracted together with pig iron from a blast furnace that produces pig iron from iron ore. Blast furnace slag is produced by cooling it to a molten state of about 1,500°C. In general, the main components include 35-55% by weight of SiO2, 35-55% by weight of CaO, and 10-20% by weight of Al2O3. Other components contained in waste molten slag include T-Fe, MgO, S, MnO, etc.

[0036] Clinker ash is a type of steel slag (slag) that is extracted together with pig iron from a blast furnace that produces pig iron from iron ore. Clinker ash is produced by heating and burning in a rotary kiln up to 1,450°C and then rapidly cooling in a cooling device. In general, the main components are 50-80% by weight of SiO2, 1-10% by weight of CaO, and 10-40% by weight of Al2O3. Other components contained in waste molten slag include Fe2O3, K2O, and MgO.

[0037] From these compositions, the composition of the main components constituting the porous body of this embodiment preferably contains 35 to 80% by weight of SiO2, 1 to 55% by weight of CaO, and 10 to 40% by weight of Al2O3.

[0038] As described above, the porous body of this embodiment is mainly composed of lime, silica, and alumina, which are components common to cement. Therefore, when the porous body comes into contact with water, lime and silica dissolve and form hydrates on the surface of the porous body, and under alkaline conditions, alumina also forms hydrates. These hydrates bind the porous bodies together and solidify like cement. Therefore, by using waste molten slag, blast furnace slag, or clinker ash as a porous body, especially in muddy areas containing a lot of water, the porous body solidifies firmly. Therefore, by using waste molten slag or the like as a porous body, the repair effect is increased compared to the water-absorbing soil for repair of Patent Document 1, which contains about 90% by weight of silica.

[0039] On the other hand, since some slags are alkaline, when these slags are used as mud-eliminating materials, it is preferable to prevent the alkali from being washed away by rainfall, etc., which may adversely affect the surrounding environment. For this reason, it is preferable to investigate the pH of the slag in advance, and add an acidic pH adjuster to highly alkaline slag to adjust the pH to a range that does not adversely affect the surrounding environment.

[0040] The acidic pH adjuster is preferably selected from the group consisting of iron (II) sulfate, aluminum sulfate, anhydrous aluminum potassium sulfate, and polyaluminum chloride. The acidic pH adjuster is preferably contained in the mud eliminator in an amount within the range of 0.5% to 1.5% by weight.

[0041] 2. Manufacturing method of the muddy water removal material Next, the manufacturing method of the muddy-water eliminator of the present invention will be described. This manufacturing method is a method for manufacturing the muddy-water eliminator described above, and includes preparing a raw material for a porous body, and subjecting the raw material for the porous body to processing such as crushing as necessary. Then, the raw material for the porous body is selected so that particles having a particle diameter of 5 mm or less are contained in 90% by weight, and the effective porosity of the porous body after this selection is 15% by weight or more.

[0042] The raw material for the porous body can be obtained from various resources, for example, the above-mentioned molten waste slag can be obtained from a garbage treatment facility, etc., and the blast furnace slag and clinker ash can be obtained from a steelworks, etc. These raw materials for the porous body may be crushed after being obtained and used, or if they are already crushed, they may be used as they are.

[0043] Next, a step of selecting the raw material for the porous body (particle size selection step) is carried out so that 90% by weight of the particles have a particle size of 5 mm or less. This step can be carried out using a sieving device or the like. The particle size of the particles contained in the porous body can be measured by a method conforming to JIS A 1204. This adjusts the porous body so that the passing rate through a 5 mm sieve is 90% by weight or more.

[0044] Furthermore, a step of selecting the porous bodies so that their effective porosity is 15% by weight or more (effective porosity selection step) is carried out. In this step, the effective porosity of the porous bodies selected in the particle size selection step is measured. As a result, if the effective porosity of the porous bodies selected in the particle size selection step is 15% by weight or more, they can be used as a muddyness eliminating material as is. On the other hand, if the effective porosity of the porous bodies selected in the particle size selection step is below 15% by weight, the effective porosity is made to be 15% by weight or more by selecting, for example, those with smaller particle sizes.

[0045] 3. How to eliminate mud Next, the method for eliminating muddy areas according to the present invention will be described. This method for eliminating muddy areas includes a step of spreading and laying the above-mentioned muddy area on the surface of a muddy soil pavement or on the ground of a puddle. The muddy area is spread at a target location, and if the area of ​​the muddy area is small, the pavement surface is laid while compacting the area with feet or a spreading tool, and if the area is large, the pavement surface is laid while compacting the area with a spreading tool and a rolling machine. EXAMPLES

[0046] The present invention will be described in detail below with reference to examples, but the object of the present invention is not limited thereto. In the following examples, "%" is based on mass (mass percent) unless otherwise specified.

[0047] 1. Mud-eliminating material (Examples 1 to 3) (1) Manufacturing of mud clearing materials Molten slag manufactured by T Company (Saitama Factory) was used as the raw material for the porous body of the muddy eliminator, and the particle size of this raw material was adjusted in a test room in Hi-Clay Co., Ltd. to produce a porous body. The porous body obtained in this way was sieved using a method for measuring the particle size of porous bodies described below. The porous bodies were classified into those with a 2mm sieve passing rate of 90% by weight or more (Example 1), those with a 3mm sieve passing rate of 90% by weight or more (Example 2), and those with a 5mm sieve passing rate of 90% by weight or more (Example 3). In addition, as comparative examples, a slag porous body with a 7mm sieve passing rate of 90% by weight or more (Comparative Example 1), sand (fine) (Comparative Example 2), and a mixture of 70% by volume of sand (fine) + 30% by volume of slag porous body with a 5mm sieve passing rate of 90% by weight or more (Comparative Example 3) were used.

[0048] (2)Measurement method (Particle size) The particle size of the porous body was measured using a sieving tester (manufactured by Tokyo Screen Co., Ltd.) in accordance with JIS A 1204. From the results of the sieve analysis, particle size accumulation curves were created with the y-axis representing the passing mass percentage and the x-axis representing the particle size (FIGS. 1 to 6). From the results, the sieve passing mass percentage was calculated for the samples of each example.

[0049] (effective porosity, etc.) The effective porosity of the porous body was measured using a coarse aggregate density and water absorption tester (manufactured by Hi-Clay Co., Ltd.) in accordance with JIS A 1110. Specifically, the mass of the sample in a surface-dry water-saturated state (A), the mass of the sample in an absolutely dry state (B), and the apparent mass of the sample in water (C) were each measured. In addition, the water density (ρw) was determined based on the water temperature at the time of measurement. The parameters of the sample were calculated based on these values ​​using the following formula. Density when surface is dry and saturated with water = A × ρw / (AC) (g / cm 3 ) Density in absolute dry state = B × ρw / (AC) (g / cm 3 ) Water absorption rate=(AB) / B×100 (%) Effective porosity = (AB) / (AC) x 100 (%) The results of these measurements are shown in the table below.

[0050] [Table 1] (*The passing rate of 5 mm in Comparative Example 1 was 45.2%)

[0051] As shown in this table, it was found that slag (porous body) with 90% or more by weight passing through a 5mm sieve had an effective porosity of about 20% by weight. It was also found that slag with 90% or more by weight passing through a 3mm sieve had an effective porosity of about 33% by weight. It was also found that slag with 90% or more by weight passing through a 2mm sieve had an effective porosity of about 42% by weight.

[0052] On the other hand, it was found that the effective porosity of slag with 90% or more by weight passing through a 7 mm sieve was reduced to about 10% by weight. As a comparative example, sand and a mixture of 70% sand volume and 30% molten slag with 90% or more by weight passing through a 5 mm sieve were examined, and the effective porosity was found to be about 5% by weight and about 13% by weight, respectively, both of which are low values.

[0053] Based on these results, it was found that by selecting slag with a particle size of 5 mm or less and a content of 90% by weight or more as the muddy-dispersing material, a porous body with an effective porosity of 15% by weight or more can be obtained.

[0054] 2. Experiments on the addition of pH acidity adjusters (Examples 1-1 to 1-6) The pH of the porous body obtained in Example 1 was adjusted by changing the addition rate of iron (II) sulfate as a pH acidity adjuster. The pH of the adjusted porous body was measured according to the method of JGS 0211. The results are shown in the table below.

[0055] [Table 2]

[0056] As shown in this table, it was found that by mixing 0.5% to 1.5% by weight of a pH acidity regulator (iron (II) sulfate) with waste molten slag, the pH can be controlled within a range (less than pH 10) that does not adversely affect the surrounding environment. When the amount of pH acidity regulator added was 0.5% by weight or less, the pH was prone to fluctuate and it was difficult to obtain stable results. In addition, when the amount of pH acidity regulator added was 1.5% by weight or more, the pH dropped significantly compared to when the amount was 1.5% by weight. Since it was not necessary to add more pH acidity regulator, it was found that an amount of 0.5% to 1.5% by weight was appropriate.

[0057] 3. Muddy Water Removal Experiment: Ground (Examples 2 and 3) An experiment was conducted to eliminate the problem of using the ground by using a mud-eliminating material in areas where mud was particularly generated and where water had accumulated. This ground felt extremely muddy when stepped on.

[0058] (1) Installation in muddy areas The mud-eliminating materials of Examples 2 and 3 and Comparative Examples 1 to 3 were used to measure the muddy area of ​​approximately 6 m2 on a very muddy area of ​​a ground (the ground in the material storage area of ​​High Clay Co., Ltd., Sakai-cho, Ibaraki Prefecture). 2 The mud-eliminating material was spread uniformly over the construction site so that 53 L was applied over an area with an average muddy layer depth of 0.8 cm, and a rake and a roller were used in combination to compact the construction site while laying the pavement surface.

[0059] (2) Installation in puddles The mud-eliminating materials of Examples 2 and 3 and Comparative Examples 1 to 3 were used in the puddles on the ground, with an area of ​​about 0.5 m 2 The mud-eliminating material was spread uniformly over the construction site at 28 liters over an area with an average depth of 5 cm at the puddles, and the pavement surface was laid while compacting it with foot or a rake. The completed pavement surface was checked for its effectiveness in eliminating mud, and the results are shown in the table below.

[0060] [Table 3]

[0061] As shown in this table, after the mud-eliminating material was sprayed on areas of the ground where mud was particularly prevalent, the mud was hardly felt underfoot. It was also confirmed by the above experiment that spraying the mud-eliminating material of the present invention on puddle areas eliminated the disruption to the use of the ground. On the other hand, in the case of the comparative example, the mud was felt, although to a different degree.

[0062] In addition, there have been cases where the spread muddy-climbing material caused color unevenness between the surrounding existing soil. One method to eliminate the color unevenness was to cover the spread muddy-climbing material with 2 to 3 mm of existing soil without removing it. In that case, too, when the surface of the covered soil was examined, no water was felt to move upwards when stepped on. No muddy feeling was felt underfoot. On the other hand, in the case of the comparative example, muddyness was felt, although to a different degree.

[0063] 4. Muddy water removal experiment: Baseball field (Examples 2 and 3) An experiment was carried out to eliminate impediments to the use of a baseball field by using the mud-eliminating material of the present invention in areas of the baseball field where significant mud had occurred or where there were puddles. When the baseball field was stepped on, it felt extremely muddy.

[0064] (1) Installation in muddy areas The mud-eliminating materials of Examples 2 and 3 and Comparative Examples 1 to 3 were used to eliminate mud in a very muddy area of ​​a baseball field (baseball field at W High School in Saitama Prefecture) with an area of ​​approximately 8 m. 2 The mud-eliminating material was spread uniformly over the construction site so that the amount was 62 liters over an area with an average muddy layer depth of 0.7 cm, and a rake and a roller were used in combination to compact the construction site while laying the pavement surface.

[0065] (2) Installation in puddles The mud-eliminating materials of Examples 2 and 3 and Comparative Examples 1 to 3 were used to remove mud from puddles of approximately 0.4 m2 in area at the baseball field. 2The mud-eliminating material was spread uniformly at the target location so that 26 L was applied over an area with an average depth of 6 cm at the puddle location, and the pavement surface was laid while compacting it with foot or a rake. The completed pavement surface was checked for its effectiveness in eliminating mud, and the results are shown in the table below.

[0066] [Table 4]

[0067] As shown in this table, when the mud-eliminating material was sprayed on a baseball field where mud was particularly likely to form, the mud underfoot was instantly eliminated. The above experiment also confirmed that spraying the mud-eliminating material of the present invention on puddle areas eliminated the impediment to the use of the baseball field. On the other hand, in the case of the comparative example, the mud was felt, although to a different degree.

[0068] In addition, the muddy-dissolving material that has been spread may cause color unevenness between the existing soil of the baseball field. As one method of eliminating color unevenness, the spread muddy-dissolving material is removed and the existing soil is backfilled in the puddle area. If water remains in the original puddle area, the backfilled existing soil will also become muddy, causing problems in use, so it is requested that no water be left behind. As a result of spreading the muddy-dissolving material of the present invention, no water was found to remain after removal. As a result, after backfilling with the existing soil, the paved surface did not feel like water was moving upwards when people stepped on it, and there was no sense of mud underfoot. On the other hand, in the case of the comparative example, water was confirmed to remain after removal, although to a different extent.

[0069] This is due to the high water absorption and excellent water binding power achieved by the high effective porosity of the mud eliminator of the present invention. In other words, the water adsorbed in the mud eliminator is bound in the pores and is removed together with the mud eliminator without moving out. [Industrial Applicability]

[0070] The muddy-climbing material of the present invention has excellent water absorption and water binding power, and can instantly eliminate impediments to use such as mud and puddles, allowing sports facilities such as grounds to be opened or used early. For example, it can be used for soil-based pavement in school yards, kindergarten yards, parks, amusement park parking lots, bicycle parking lots, etc. In addition, since the main raw materials of the muddy-climbing material of the present invention are waste molten slag, blast furnace slag, and clinker ash, they can be easily procured from local governments nationwide, and costs can be kept low.

Claims

1. A muddy-water eliminator characterized in that it contains 90% by weight or more of a porous body having a particle content of 90% by weight or more of particles having a particle diameter of 5 mm or less and an effective porosity of 15% by weight or more.

2. In the muddy water eliminator according to claim 1, A mud-eliminating material comprising 0.5% by weight to 1.5% by weight of an acidic pH adjuster.

3. In the muddy eliminator according to claim 2, The mud-eliminating material is characterized in that the acidic pH adjuster is selected from the group consisting of iron (II) sulfate, aluminum sulfate, anhydrous potassium aluminum sulfate, and polyaluminum chloride.

4. In the muddy water eliminator according to claim 1, The mud-eliminating material is characterized in that the porous body is selected from the group consisting of waste molten slag, blast furnace slag, and clinker ash.

5. In the method for producing the muddy eliminator according to claim 1, A step of selecting a raw material for the porous body so that the raw material contains particles having a particle diameter of 5 mm or less at 90% by weight; and a step of selecting the porous body after the selection so that the effective porosity of the porous body after the selection is 15% by weight or more.

6. A method for eliminating mud, comprising spreading and laying the mud-eliminating material according to any one of claims 1 to 4 on a paved surface of an earth-based pavement where mud has occurred or on the ground of a puddle.

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