JP2003165757A - Permeable solid material and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a permeable solid material equipped with a strength and a permeability to be usable as a pavement material by effectively using coal ash discharged from a thermal power plant and reduce its manufacturing cost by improving its strength and reducing a construction time in paving. <P>SOLUTION: Coal ash 100, cement 30-150, water 10-70, and a superplasticizer 0.3-1.5 pts.wt. as major components are mixed-kneaded and hardened. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-permeable solid material having a water-permeable property which is used as a paving material for parks, promenades, roads, parking lots, etc.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of environmental protection, pavement materials having water permeability have attracted attention and various pavement materials have been constructed. For example, in Japanese Unexamined Patent Application Publication No. 10-194818, a mixture of cement and water having a ratio of 0.25, No. 7 crushed stone (5 to 5
2.5 mm), No. 6 crushed stone (13 to 5 mm), a binder, and a pigment are mixed / kneaded and placed on the surface to be paved or cured in a mold to produce water-permeable concrete. ing. However, with this method,
Crushed stone is used as the main raw material. Crushed stone is concerned about resource depletion, and its production has an environmental burden.

Further, in Japanese Patent Laid-Open No. 8-239281, 300 to 400 kg of cement is used for 1 m ^{3 of} volcanic debris (volcanic sand, volcanic ash, volcanic rock), and usually mortar is used for 1 part by mass of cement. 0.005 to 0.1 part by mass of the binder and 0.3 to 0.4 part by mass of water are kneaded, and the mixture is cast on the surface to be paved or pressure-hardened in a form to give water-permeable concrete. Manufacturing is disclosed. Here, since the volcanic debris (volcanic sand, volcanic ash, volcanic rock) is used as the main raw material, the material cost is low. However, it is presumed that the binder used is not appropriate, and therefore the strength cannot be exhibited while ensuring the voids required for high water permeability.

Further, in Japanese Patent Laid-Open No. 4-198049, at least one of slowly cooled slag, limestone, and water granulated slag, an aggregate made of water granulated slag fine powder, and an alkali stimulant 1 to 1 such as cement or gypsum. A water-permeable composition consisting of 14% by weight is disclosed. No binder is used. In this method, cement or gypsum, which is an alkali stimulating material, is used for binding the aggregate. Since the solidifying action is performed only by the reaction of these alkali stimulants, the composition does not have both water permeability and strength.

By the way, in recent years, a large amount of coal ash generated from thermal power plants and the like has been increasing year by year. In particular, what is called clinker ash generated at the bottom of a boiler is poor in its disposal method, and it is effectively used. Is required to be promoted. Under such circumstances, a method of utilizing such a large amount of coal ash as a water-permeable pavement material as described above is proposed in JP-A-02-271952. Here, 100-500 parts by mass of coal ash clinker and 10-20 parts by mass of cement hardening agent are mixed with 100 parts by mass of white cement, and water is added to this mixture.
It is disclosed that a product for civil engineering is manufactured by molding and drying by a rolling compaction method.

[0006] However, the civil engineering product according to Japanese Patent Laid-Open No. 02-271952 uses a cement hardening agent but does not use an appropriate admixture or binder.
Although it is not clear because the specific hydraulic conductivity is not shown, it is presumed that the voids formed in the solid matter are reduced, and the hydraulic conductivity is presumed to be low.

Further, in Japanese Patent Laid-Open No. 2001-114549, by using coal ash as an aggregate, it is possible to bond the coal ash with high strength even with a small amount of cement due to the pozzolanic properties of the coal ash. It is shown. Further, by interposing an inorganic substance between the particles of the coal ash of the aggregate, even when the amount of cement is reduced, the voids between the particles of the coal ash are always secured without impairing the strength, and the water permeability is maintained. It is disclosed that a solid material having a certain strength can be manufactured.

However, the civil engineering product according to Japanese Patent Laid-Open No. 2001-114549 requires high cement strength with a small amount of cement by utilizing the pozzolanic properties of coal ash, and therefore it is necessary for the strength to be available. The time tends to be long (the strength development is low). Therefore, when constructing a water-permeable pavement, it is expected that the construction days will be long and the manufacturing cost will be high.

[0009]

Therefore, the present invention provides a water-permeable solid material having both strength and water permeability as a paving material by effectively utilizing coal ash generated from a thermal power plant or the like. This is the first purpose. Further, a second object is to improve the strength development property to shorten the construction time when constructing the pavement and reduce the manufacturing cost.

[0010]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the inventors of the present invention have conducted extensive studies, and by using coal ash as an aggregate, long-term high strength can be obtained due to the pozzolanic properties of the coal ash. By increasing the amount of cement while developing,
It was found that it is possible to increase the expression rate. Also, by using a high-performance water reducing agent and fly ash of coal ash, the amount of water is reduced and controlled to an appropriate amount. The present invention has been completed, and found that a solid substance having a certain strength or more can be formed by always ensuring the water content, maintaining the water permeability, and suppressing the water-cement ratio to be small.

That is, the water-permeable solid substance according to claim 1 of the present invention is cement 3 parts with respect to 100 parts by mass of coal ash.
0 to 150 parts by mass, 10 to 70 parts by mass of water, and 0.3 to 1.5 parts by mass of a high-performance water reducing agent as a main component, which are characterized by being cured after mixing and kneading. According to this, since the coal ash is used as an aggregate, it is possible to exhibit long-term high strength due to the pozzolanic properties of the coal ash and also have water permeability. Further, by increasing the amount of cement, the rate of strength development can be increased, and when constructing a water-permeable pavement, the number of construction days is shortened, and the manufacturing cost can be reduced. Further, in the present invention, by adding a high-performance water reducing agent, the amount of water is reduced and controlled to an appropriate amount. Can be secured,
By maintaining the water permeability and suppressing the water-cement ratio to be small, it becomes possible to form a solid substance having a certain strength or more.

The water-permeable solid material according to claim 2 is
The claim 1 is characterized in that the coal ash is clinker ash. According to this, the clinker ash, which is the coal ash that is generated in large quantities at the bottom of the boiler of the thermal power plant and has been difficult to dispose of, can be effectively used.

The water-permeable solid material according to claim 3 is
The particle size of the coal ash according to claim 1 or 2 is 10 mm.
It is characterized by the following. According to this, it is possible to increase the smoothness of the surface of the cured body and suppress variations in strength.

Further, the water-permeable solid material according to claim 4 is
With respect to 100 parts by mass of clinker ash, 100 parts by mass or less of fly ash, 25 to 150 parts by mass of cement,
It is characterized in that it contains 10 to 70 parts by mass of water and 0.3 to 1.5 parts by mass of a high-performance water reducing agent as main components, and is mixed and kneaded and then cured. According to this, since fly ash is used, the amount of water can be reduced by its water reducing effect, and since the hydrated tissue becomes dense due to the pozzolan reaction, the chemical resistance is improved, In addition, the strength increases over a long period of time.

The water-permeable solid material according to claim 5 is
The clinker ash according to claim 4, wherein the grain size is 1
It is characterized by being 0 mm or less. According to this, the surface of the water-permeable solid material can be made smooth.

Further, the water-permeable solid substance according to claim 6 is
In any one of Claims 1 thru | or 5, all components are mixed and knead | mixed simultaneously, and it is made to harden | cure, It is characterized by the above-mentioned. According to this, since the materials are collectively mixed and kneaded in the mixer, the time required for manufacturing can be shortened and the construction can be rationalized.

The water-permeable solid material according to claim 7 is
The pellet according to any one of claims 1 to 5, wherein all components except a part of cement, a part of water and a superplasticizer are mixed and kneaded to form a pellet, and then the pellet and the remainder of the cement. And the balance of water and the high-performance water reducing agent are mixed, kneaded, and cured. according to this,
The pellets, which are made of coal ash as a core and covered with cement paste, form the aggregate of the water-permeable solid. Since the pellets have higher strength and uniform particle size than coal ash, the water permeability and strength of the water-permeable solid can be further increased.

The water-permeable solid material according to claim 8 is
In any one of Claims 1 thru | or 5, it is characterized by adding 2-7 mass parts of inorganic additives. According to this, even when the amount of cement is reduced, high water permeability can be obtained without significantly lowering the strength of the solid matter.

The method for producing a water-permeable solid according to claim 9 is 100 parts by mass of coal ash and 30 to 15 cements.
0 parts by mass, 10 to 70 parts by mass of water, and a high performance water reducing agent.
3 to 1.5 parts by mass are mixed and kneaded to cure. According to this, since the coal ash is used as an aggregate, it is possible to exhibit long-term high strength due to the pozzolanic properties of the coal ash and also have water permeability. Further, by increasing the amount of cement, the rate of strength development can be increased, and when constructing a water-permeable pavement, the number of construction days is shortened, and the manufacturing cost can be reduced. Further, in the present invention, by adding a high-performance water reducing agent, the amount of water is reduced and controlled to an appropriate amount. It is possible to secure solidity, maintain water permeability, and suppress the water-cement ratio to a low level, whereby it becomes possible to form a solid material having a certain strength or more.

Further, the method for producing a water-permeable solid material according to claim 10 is 100 parts by mass of clinker ash, 100 parts by mass or less of fly ash, and cement 25 to 150.
10 parts by mass of water, 10 to 70 parts by mass of water, and 0.3 of a high-performance water reducing agent.
˜1.5 parts by mass is mixed and kneaded to cure. According to this, since fly ash is used, the amount of water can be reduced by its water reducing effect, and since the hydrated tissue becomes dense due to the pozzolan reaction, the chemical resistance is improved, In addition, the strength increases over a long period of time.

The method for producing a water-permeable solid according to claim 11 is characterized in that, in claim 9 or 10, all the components are mixed and kneaded at the same time and cured.
According to this, since the materials are collectively mixed and kneaded in the mixer, the time required for manufacturing can be shortened and the construction can be rationalized.

The method for producing a water-permeable solid according to claim 12 is the method according to claim 9 or 10, wherein all components except for a part of cement, a part of water and a superplasticizer are added. Mix and knead to form pellets, then mix the pellets with the rest of the cement, the rest of the water, and the superplasticizer.
Characterized by kneading and curing. according to this,
The pellets, which are made of coal ash as a core and covered with cement paste, form the aggregate of the water-permeable solid. Since the pellets have higher strength and uniform particle size than coal ash, the water permeability and strength of the water-permeable solid can be further increased.

The method for producing a water-permeable solid according to claim 13 is characterized in that, in claim 9 or 10, 2 to 7 parts by mass of an inorganic additive is further added. According to this, even when the amount of cement is reduced,
High water permeability can be obtained without significantly lowering the strength of the solid matter.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. There are two types of methods for producing the water-permeable solid material of the present invention. The first method is a method of mixing and kneading all the components at the same time and curing them (hereinafter, referred to as "collective manufacturing method"). In this method, all the respective components are weighed, put into a mixer all at once, and stirred for 60 to 180 seconds to carry out the production, so that rapid and rational production is possible. As the mixer used in this production, a known mixer for mixing concrete, such as a forced biaxial type, a horizontal pan type, and a tilting type, can be used.

The second method is to first form a pellet by mixing and kneading all components except a part of cement, a part of water and a superplasticizer, and then forming the pellet and the rest of the cement. This is a method of mixing and kneading the rest of the water and the high-performance water reducing agent, and curing (hereinafter referred to as "pellet manufacturing method"). In this method, a coal ash, a part of water, and a part of cement are mixed and kneaded to produce a granular solid (pellet) whose periphery is covered with cement paste with the coal ash as a core. The pellets thus produced and the remaining cement, water and a high-performance water reducing agent are mixed and kneaded to produce. In the water-permeable solid matter produced in this manner, this pellet serves as an aggregate part, and this pellet has a higher strength than coal ash,
Further, since the particle size is uniform, it is possible to further increase the water permeability coefficient and strength of the water permeable solid. The produced pellets are preferably used after about 24 hours or more have passed from the production. This is because if the pellets that have not been produced for a long time are used, the strength of the pellets themselves is insufficient, and the pellets may crack during the production. The mixer used in this production may be a known mixer for mixing concrete, such as a forced biaxial type, a horizontal pan type, and a tilting type.

Each component will be described below.
The coal ash used in the present invention can use clinker ash which is generated in large quantities at the bottom of a boiler of a thermal power plant. This coal ash (clinker ash) has a particle size of 10 mm or less in order to increase the smoothness of the surface of the cured product of the invention and to suppress the variation in strength. Even if it is contained up to 10% with respect to the total mass (air-dried state), it has almost no effect on the smoothness and does not affect the strength, so that it can be used.

In the present invention, 30 to 150 parts by mass of cement is mixed with 100 parts by mass of coal ash. This is because when the amount of cement mixed is less than 30 parts by mass,
The amount of cement paste for combining coal ash and coal ash is insufficient and the strength decreases, and the amount of cement mixed is 150.
This is because if it is larger than the mass part, the amount of cement paste becomes excessively large, the voids between coal ash are clogged, the void gap becomes small, and the water permeability decreases.

When the water-permeable solid material is produced by the above-mentioned batch production method, the amount of cement mixed is 35 to 8 in particular.
The amount is preferably 0 part by mass, more preferably 35 to 75 parts by mass.

When the water-permeable solid material is produced by the above-mentioned pellet production method, the cement content is 50%.
It is preferable to set it to 140 parts by mass.

The cement used in the present invention includes various kinds of cement, for example, ordinary Portland cement, early-strength cement, blast furnace cement, fly ash cement and the like. In addition, strength development can be improved by using early strength cement.

In the present invention, a high performance water reducing agent (or a high performance AE water reducing agent) is mixed with coal ash. This high-performance water-reducing agent is adsorbed on the interface of the cement particles and disperses the cement particles by electrostatic repulsion to increase the fluidity of the cement paste. It is an admixture with.

In the present invention, a high-performance water reducing agent (or a high-performance AE water reducing agent) is added to 0.3 part with respect to 100 parts by mass of coal ash.
-1.5 parts by mass are mixed. This is because if the mixing amount of the superplasticizer is 0.3 parts by mass or less, the effect of the superplasticizer is not sufficiently exerted, and the mixing amount of the superplasticizer is 1.5 parts by mass or more. In that case, the amount of the high-performance water reducing agent becomes excessively large, which may significantly delay the setting. Further, it is more preferable to set the mixing amount to 0.3 to 0.75 parts by mass. Further, it is preferable that the high-performance water reducing agent is blended in a ratio of about 1% with respect to cement.

The high-performance water reducing agent (or high-performance AE water reducing agent) used in the present invention includes various high-performance water reducing agents, for example, naphthalene type, melamine type, polycarboxylic acid type, aminosulfonic acid type. Etc. As a general rule, it is advisable not to mix several superplasticizers and use one of them. This is because the effect may not be exhibited if a mixture of several high performance water reducing agents is used.

In the present invention, 10 to 70 parts by mass of water is mixed with 100 parts by mass of coal ash. This is because when the amount of water mixed is 10 parts by mass or less, the hydration reaction with the binder such as cement and fly ash is not properly performed, so that the strength of the cured product is insufficient and the hydraulic conductivity is reduced. This is because. Further, when the mixing amount of water is 70 parts by mass or more, the water cement of the cement paste becomes large, and the strength is lowered, or the viscosity of the cement paste is remarkably lowered, and the action for binding the coal ash and the coal ash is achieved. This is because it does not happen. Further, it is more preferable to set the mixing amount to 10 to 30 parts by mass.

Various types of water can be used in the present invention, and examples thereof include tap water, river water, lake water, ground water and the like. However, when using water other than water supply, JI
It is desirable to use the one that satisfies the quality standard of SA 5308 “Lady Mixed” or the water quality standard of JSCE.

In the present invention, 100 parts by mass of coal ash may be further mixed with fly ash in an amount of 100 parts by mass or less. When fly ash is added, the main component, silicon dioxide (Si0 ₂ ) is calcium hydroxide (Ca (OH) ₂ ) produced by the hydration reaction of cement.
And gradually combine at room temperature to form an insoluble and stable calcium silicate hydrate. By this action, the cement paste portion becomes dense, the chemical resistance of the solid matter of the present invention is improved, and the strength is increased for a long period of time. In addition, most of the fly ash particles have a smooth spherical surface, so the particles act as ball bearings and improve the fluidity of the cement paste.Compared with the case where fly ash is not mixed, The amount of water can be reduced.
This water reducing effect also increases the strength of the solid matter and improves the durability. However, if the amount of fly ash added is increased, the initial strength may be delayed or the number of curing days may be increased. Therefore, the admixture amount is preferably up to 50 parts by mass, and further up to 25 parts by mass. Is more preferable.

If more fly ash is added,
Since fly ash can be considered as a binder in the same manner as cement, the amount of cement added can be reduced. Specifically, the minimum value of the mixing amount of cement can be reduced to 30 parts by mass from 30 parts by mass when the fly ash described above is not added. The other mixing amount can be considered in the same manner as in the case where the fly ash described above is not added.

The fly ash used in the present invention is a by-product generated when burning pulverized coal in a coal-fired power plant, but its quality varies depending on the quality of the pulverized coal, combustion conditions, collection method, etc. To comply with JIS A 62
It is preferable to use those satisfying the criteria of 01 (fly ash).

In the present invention, inorganic additives may be further added. When an inorganic additive is added, even if the amount of cement is small, the additive penetrates into a part of the voids between the particles of coal ash, and the additive crosslinks and bonds each particle of coal ash with cement and Become. As a result, the coal ash particles are firmly bonded to each other to form a solid having a certain strength or more, and the water permeability can be maintained by always ensuring the voids between the coal ash particles.

When the amount of the inorganic additive added is less than 2 parts by mass with respect to 100 parts by mass of the coal ash, the effect of adding the additive is not sufficiently expressed and sufficient strength cannot be obtained. Further, if the mixing amount exceeds 7 parts by mass, the voids are filled and the water permeability deteriorates, which is not preferable.

Here, examples of the inorganic additive include:
Examples thereof include calcined powder of silica / alumina system called fine clay, and inorganic substances such as bentonite, kaolin, talc, and water glass. Further, these inorganic substances can be used alone or in combination.

The hardened material of the present invention has the material color (gray) of coal ash, but it can be colored with various coloring materials for admixing cement in order to improve the appearance. Regarding the usage amount, the addition amount recommended by each manufacturer is generally suitable in the present invention.

[0043]

EXAMPLES The present invention will be specifically described below with reference to examples. The present invention is not limited to the examples below.

Examples 1 to 6 and Comparative Examples 1 and 2 Coal ash called clinker ash (particle size distribution is shown in FIG. 1), ordinary Portland cement, high performance water reducing agent (polycarboxylic acid as main component) , Tap water, and fly ash (JIS A 6201 compliant product) were kneaded at the compounding ratios shown in Table 1, and the kneaded products were mixed with a mold (φ100).
× 200 mm) and put on a vibration table (frequency 3000 rp)
m, total amplitude about 1 mm) uniaxial pressure shaping (pressing force 0.25
kgf / cm ² (24.5 kPa)) and cured to give a solid for testing.

(Strength Test) The strength was measured by measuring the compressive strength after 28 days of age.

(Measurement of Water Permeability Coefficient) As described above, the water permeability coefficient was measured in accordance with the "constant water level water permeability test" of the soil water permeability test method specified in JIS A 1218.

Table 1 shows the results of the above strength test, the results of water permeability measurement, and the results of relative comparison of strength development.

[0048]

[Table 1]

First, attention is paid to the result of the strength test and the result of the measurement of the water permeability. In Example 1, a water-permeable solid substance having a well-balanced water permeability and compressive strength was obtained. Example 2 is
It is a composition in which the amount of cement is reduced as compared with Example 1.
Compared with Example 1, the hydraulic conductivity was large and the compressive strength was low. Example 3 is a composition in which the amount of cement is increased as compared with Example 1. Compared with Example 1, the hydraulic conductivity was small and the compressive strength was increased. Example 4 is a composition in which fly ash is mixed with Example 1. In comparison with Example 1,
Both hydraulic conductivity and compressive strength increased. Example 5 is a composition in which the amount of cement is further reduced as compared with Example 2 and an inorganic additive is added. Despite the decrease in the amount of cement, the decrease in compressive strength is slight. On the other hand, the water permeability increased significantly. Example 6 is an example of producing a water-permeable solid material by the above-described pellet production method. A solid having a high hydraulic conductivity and a high compressive strength was obtained.
Comparative Example 1 is a composition in which the amount of cement is further reduced as compared with Example 2. Although the hydraulic conductivity increased, the compressive strength decreased significantly and the strength as a roadbed was insufficient.
Comparative Example 2 is a composition in which the high performance water reducing agent was not mixed as compared with Example 1. Both the hydraulic conductivity and the compressive strength were lower than those of Example 1.

Next, attention will be paid to the relative comparison result of strength development. In Example 5 and Comparative Example 1, strength development is inferior to the other examples. This is because the amount of cement is small. However, as described above, Example 5 ensures sufficient compressive strength and water permeability by the action of the inorganic additive. Further, if early-strength cement is used as the cement, it is possible to improve the strength development property to some extent.

[0051]

According to the inventions of claims 1 and 9,
Since coal ash is used as an aggregate, it is possible to develop long-term high strength due to the pozzolanic properties of coal ash and also have water permeability. In addition, by increasing the amount of cement, it is possible to increase the strength development rate, and when constructing a water-permeable pavement, the number of construction days becomes shorter,
It is possible to reduce the manufacturing cost. Further, in the present invention, by adding a high-performance water reducing agent, the amount of water is reduced and controlled to an appropriate amount. It is possible to secure solidity, maintain water permeability, and suppress the water-cement ratio to a low level, whereby it becomes possible to form a solid material having a certain strength or more.

According to the second aspect of the present invention, it is possible to effectively use the clinker ash, which is the coal ash that is generated in a large amount at the bottom of the boiler of the thermal power plant and has been impoverished in the disposal method.

According to the third aspect of the invention, it is possible to enhance the smoothness of the surface of the cured body and to suppress variations in strength.

Further, according to the inventions of claims 4 and 10, in addition to the effects of the inventions of claims 1 and 9, since fly ash is further used, the amount of water is reduced by the water reducing effect. In addition, the pozzolanic reaction causes the hydrated tissue to become compact, which improves chemical resistance and increases strength over a long period of time.

According to the fifth aspect of the present invention, the smoothness of the surface of the cured body can be increased and the variation in strength can be suppressed.

Further, according to the inventions of claims 6 and 11, since the materials are mixed and kneaded together in a mixer, the time required for manufacturing can be shortened and the construction can be rationalized.

Further, according to the inventions of claims 7 and 12, the pellets, in which coal ash is used as a core and the periphery of which is covered with cement paste, serve as an aggregate portion of the water-permeable solid material. Since the pellets have higher strength and uniform particle size than coal ash, the water permeability and strength of the water-permeable solid can be further increased.

According to the eighth and thirteenth aspects of the present invention, even when the amount of cement is reduced, high water permeability can be obtained without significantly lowering the strength of the solid matter.

[Brief description of drawings]

FIG. 1 is a diagram showing a particle size distribution of an example of a clinker ash that can be used for a water-permeable solid material according to the present invention.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C04B 38/00 302 C04B 38/00 302Z (72) Inventor Masato Katayama 1-6 Edobori, Nishi-ku, Osaka-shi, Osaka −14 Kobe Steel Co., Ltd. Osaka Branch Office (72) Inventor Masayuki Tanaka 1-6-14 Edobori, Nishi-ku, Osaka City, Osaka Prefecture Incorporated Kobe Steel Co. Osaka Branch Office (72) Inventor Masafumi Kawakami 4 Kamikoshien, Nishinomiya City, Hyogo Prefecture −9−66−710 (72) Inventor Shinji Hasegawa 1-43-3 Yurinokidai, Mita City, Hyogo Prefecture (72) Inventor Kazuya Uemura 3-18-303 Koyoen Nishiyamacho, Nishinomiya City, Hyogo Prefecture (72) Inventor Ishihiro Masahiro 16-1 Nawate-cho, Kashihara-shi, Nara F term (reference) 4G012 PA26 PA27 PB31 PC03 PC11 4G019 DA04

Claims (13)

[Claims] 1. After mixing and kneading, the main components are 30 to 150 parts by mass of cement, 10 to 70 parts by mass of water, and 0.3 to 1.5 parts by mass of a high performance water reducing agent, relative to 100 parts by mass of coal ash. ,
A water-permeable solid material characterized by being cured. 2. The water-permeable solid material according to claim 1, wherein the coal ash is clinker ash. 3. The water-permeable solid material according to claim 1, wherein the coal ash has a particle size of 10 mm or less. 4. 100 parts by mass or less of fly ash, and 25 to 25 parts of cement to 100 parts by mass of clinker ash.
150 parts by mass, 10 to 70 parts by mass of water, high-performance water reducing agent 0.
A water-permeable solid material comprising 3 to 1.5 parts by mass as a main component, which is obtained by mixing, kneading, and curing. 5. The clinker ash has a particle size of 10 m.
It is m or less, The water-permeable solid substance of Claim 4 characterized by the above-mentioned. 6. The water-permeable solid material according to claim 1, which is obtained by mixing and kneading all components at the same time and curing the mixture. 7. A pellet is formed by first mixing and kneading all components except a part of cement, a part of water and a high-performance water reducing agent, and then forming the pellet, the rest of the cement and the rest of the water. The water-permeable solid material according to any one of claims 1 to 5, which is obtained by mixing and kneading with a high-performance water reducing agent and curing the mixture. 8. The water-permeable solid material according to claim 1, which further comprises 2 to 7 parts by mass of an inorganic additive. 9. 100 parts by mass of coal ash and 30 to 30 parts of cement.
150 parts by mass, 10 to 70 parts by mass of water, and 0.3 to 1.5 parts by mass of a high-performance water reducing agent are mixed and kneaded to be cured, and a method for producing a water-permeable solid material. 10. 100 parts by mass of clinker ash,
100 parts by weight or less of fly ash and 25 to 1 cement
50 parts by mass, 10 to 70 parts by mass of water, and 0.3 to 1.5 parts by mass of a high-performance water reducing agent are mixed and kneaded to be cured, and a method for producing a water-permeable solid material. 11. The method for producing a water-permeable solid according to claim 9, wherein all the components are mixed and kneaded at the same time to be cured. 12. A pellet is formed by first mixing and kneading all components except a part of cement, a part of water and a high-performance water reducing agent, and then forming the pellet, the rest of the cement and the rest of the water. The method for producing a water-permeable solid according to claim 9 or 10, wherein the high-performance water reducing agent is mixed, kneaded, and cured. 13. The method for producing a water-permeable solid according to claim 9, further comprising adding 2 to 7 parts by mass of an inorganic additive.