JP2006282407A - Large size container and waste material containing block - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a large size container which is used for storing and disposing waste materials such as concrete sludge and can prevent the diffusion of various substances contained in the waste materials into the surrounding environment by a wall body having a simple structure, whose mass can be suppressed to the extent capable of being carried even when it is manufactured, for example, as a large size box-type container having one side of ≥4 m, and which can increase the efficiency in waste material treatment by upsizing. <P>SOLUTION: The large size container 1 has a container main body 2 having a volume of ≥50 m<SP>3</SP>and a cap body 3. The container main body 2 and the cap body 3 are formed from a hardened body of a cement-based blend containing cement, a pozzolan-based fine powder having an average particle diameter of ≤1.0 μm, a fine aggregate having a maximum grain diameter of ≤2 mm, a metal fiber, a water reducer, and water. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a large container for storing and disposing of waste such as concrete sludge generated in construction work and the like, and a waste containing block formed by storing waste in the large container.

Conventionally, various concrete containers for storing and disposing of waste have been proposed.
As an example, a box made of reinforced concrete whose inner surface is coated with a covering material such as synthetic rubber, a predetermined waste contained in the box, and a liquid coating such as synthetic rubber covering the upper surface of the waste A waste disposal unit comprising a material and a lid fitted to the box has been proposed (Patent Document 1).
As another example, after solidifying by putting waste and cement kneaded together into a container structure having a double structure of an outer layer made of reinforced concrete and an inner layer made of polyethylene container, this solidification Add normal mortar over the object, then fix the lid to the polyethylene container, and finally sew the reinforcing bars in a lattice shape above the polyethylene container, and put the ordinary concrete in the space containing the lattice reinforcing bars. There has been proposed a structure in which waste is accommodated by pouring and sealing a polyethylene container (Patent Document 2).
JP 2000-176396 A Japanese Unexamined Patent Publication No. 2000-176597

In the above-mentioned conventional technology, in order to prevent various substances contained in the waste from passing through the concrete and diffusing into the surrounding environment, the passage of waste is performed inside the box body made of concrete. As an inner wall surface forming material for blocking the above, a covering material such as synthetic rubber or a polyethylene container is provided. However, since such an inner wall surface forming material is necessary, there is a problem that it takes time to manufacture the container.
On the other hand, when manufacturing a box-shaped container with a side of 4 m or more using ordinary concrete, in order to ensure strength, the thickness of the wall constituting the box-shaped container is set to 20 cm or more. It is necessary to arrange a large number of reinforcing bars inside the concrete. However, in this case, the mass of the box-shaped container becomes large, and the operation of moving the box-shaped container becomes very difficult. In this regard, a large container having a box shape with a side of 4 m or more capable of storing waste, the wall constituting the large container having a thickness of about 10 cm, and having a sufficient strength If it can be manufactured, the processing efficiency of the waste is increased while ensuring the strength required when the large container is moved, which is advantageous.
Therefore, the present invention allows various substances contained in the waste to be obtained by the simple structure wall body made of a single material without adopting a double structure wall body including a covering material such as synthetic rubber. It can be prevented from diffusing into the surrounding environment, and even if it is manufactured as a box-shaped large container with a side of 4 m or more, for example, it can be suppressed to a mass that can be moved, etc. An object of the present invention is to provide a large container capable of improving the efficiency of waste disposal by increasing the size.

  As a result of intensive studies to solve the above problems, the present inventor has formed a water-impermeable container body for containing waste by using a cement-based compound containing a specific material ( a) Even if the inner surface of the container body is not coated with synthetic rubber or the like, it is possible to prevent the diffusion of various substances contained in the waste into the surrounding environment, and (b) no reinforcing bars are required. Alternatively, the thickness of the wall constituting the container body can be reduced while reducing the amount, and for example, even if it is produced as a box-shaped large container having a side of 4 m or more, the mass of the entire container does not become excessive. The inventors have found that a large container can be moved and completed the present invention.

That is, the present invention provides the following [1] to [6].
[1] A large container including a container body having a volume of 50 m ³ or more, wherein the container body is cement, fine pozzolanic powder having an average particle diameter of 1.0 μm or less, fine aggregate having a maximum particle diameter of 2 mm or less, metal fiber A large container comprising a hardened body of a cement-based composition containing a water reducing agent and water.
[2] The large container according to [1], wherein the cement-based compound contains an inorganic powder having an average particle diameter of 3 to 20 μm.
[3] The large container according to [1] or [2], including a lid made of a hardened body of a cement-based blend similar to the container body.
[4] The large container according to [3], wherein the container body and the lid body have a joint portion made of a hardened body of a cement-based compound similar to the container body.
[5] The container body according to [1] to [4], wherein the container body is a box-shaped molded body having a side of 4 m or more, and a wall body constituting the container body has a thickness of 7 to 13 cm. Any large container.
[6] A waste-containing block comprising the large container according to any one of [1] to [5] and waste stored in the large container.

In the large container of the present invention, since the container main body is impermeable, various substances in the waste contained in the container main body can be prevented from diffusing into the surrounding environment. Moreover, the water impermeability, sealing performance, and mechanical strength of the whole container can be ensured by forming the lid or the joint between the container body and the lid by using the same material as the container body.
In addition, since the material of the container main body has a large mechanical strength, the large container of the present invention does not require reinforcing reinforcing bars or uses a small amount, and the thickness of the wall constituting the container main body is sufficient. Can be small. For example, even if it is manufactured as a box-shaped large container having a side of 4 m or more, it can be suppressed to a mass that can be moved. And the efficiency of waste disposal can be achieved by increasing the size of the container.
Moreover, since the container main body consists of a single material, the large sized container of this invention can be manufactured easily and efficiently by a simple process. Further, by forming a lid or a joint between the container main body and the lid with the same material as that of the container main body, it is possible to further facilitate manufacture and increase efficiency.
Furthermore, since the large container of the present invention is made of a material excellent in denseness, moisture does not permeate from the surrounding environment during use and has excellent durability. Therefore, the large container according to the present invention can be used for, for example, a wave-blocking block, in addition to storing the waste and then placing it outdoors or burying it in the soil for disposal.

The large container of the present invention is usually composed of a container main body having an opening for accommodating waste, and a lid attached to the opening used in combination with the container main body.
In addition, after throwing in a waste material from the opening part of a container main body, curable compositions, such as mortar and concrete, can be poured from this opening part, and a waste material can also be sealed. However, in this case, the amount of the curable composition used tends to increase. Therefore, in the present invention, it is preferable to use a combination of a container body and a lid.
The container body is made of a hardened body of cement-based blend containing cement, fine pozzolanic powder having an average particle size of 1.0 μm or less, fine aggregate having a maximum particle size of 2 mm or less, metal fibers, a water reducing agent and water. .
Hereinafter, the material of the container body will be described in detail.
The type of cement is not particularly limited. For example, various portland cements such as ordinary portland cement, early-strength portland cement, medium heat portland cement, low heat portland cement, and mixed cements such as blast furnace cement and fly ash cement. Etc. can be used.
In the present invention, when improving early strength development, it is preferable to use early-strength Portland cement. When improving the fluidity of the blend, moderately hot Portland cement or low heat Portland cement is used. Is preferably used.

In the present invention, a pozzolanic fine powder having an average particle size of 1.0 μm or less is used. If the average particle size exceeds 1.0 μm, the strength development of the cured product is lowered, which is not preferable.
Examples of the pozzolanic fine powder include silica fume, silica dust, fly ash, slag, volcanic ash, silica sol, and precipitated silica. Among these, silica fume and silica dust have an average particle size of 1.0 μm or less and are not costly because they do not need to be crushed.
The blending amount of the pozzolanic fine powder is preferably 5 to 50 parts by mass with respect to 100 parts by mass of cement from the viewpoint of fluidity of the blend and strength development of the cured body.
When the blending amount is less than 5 parts by mass or exceeds 50 parts by mass, the fluidity of the blend is lowered, and operations such as molding become difficult. In addition, the strength development and durability of the cured body are reduced, and after the start of use of the cured body, there is a possibility that a part of the cured body may be chipped or peeled off, and the appearance may be deteriorated accordingly. It is not preferable.

In the present invention, a fine aggregate having a maximum particle size of 2 mm or less is used. If the maximum particle size of the fine aggregate exceeds 2 mm, the strength expression of the cured body is lowered, which is not preferable.
In the present invention, it is preferable to use a fine aggregate having a maximum particle size of 1.5 mm or less from the viewpoint of the strength development of the cured product.
As the fine aggregate, for example, river sand, land sand, sea sand, crushed sand, silica sand, or a mixture thereof can be used.
The amount of fine aggregate blended is 100 parts by mass of cement from the viewpoint of fluidity of the blend, strength development of the cured body, and further reduction of self-shrinkage and drying shrinkage, reduction of hydration heat generation, etc. The amount is preferably 50 to 250 parts by mass, more preferably 80 to 180 parts by mass.

In the present invention, metal fibers are used.
Examples of metal fibers include steel fibers and amorphous fibers. Among these, steel fibers are preferably used because they have high strength and are excellent in terms of cost and availability.
The shape and dimensions of the metal fibers are preferably a length of 2 mm or more and a length / diameter ratio of 20 or more, more preferably a length of 2 to 30 mm and a length / diameter ratio of 20 ~ 200.
If the length of the metal fiber is less than 2 mm, the effect of improving the bending strength is lowered, which is not preferable. If the length exceeds 30 mm, fiber balls are likely to be produced during kneading, which is not preferable.
If the length / diameter ratio of the metal fibers is less than 20, the number of fibers with the same blending amount (same volume) decreases, and the effect of improving the bending strength is reduced, which is not preferable. If the ratio exceeds 200, the strength of the metal fiber itself is insufficient, and it is easy to break when subjected to tension, which is not preferable.
The compounding quantity of a metal fiber is a volume ratio in a compound, Preferably it is 0.1 to 6%, More preferably, it is 0.5 to 5.5%. When the blending amount is less than 0.1%, the bending strength of the cured body may be lowered. If the blending amount exceeds 6%, the unit water amount must be increased in order to ensure workability during kneading, and the strength of the cured product may be reduced.

As the water reducing agent, for example, water reducing agents such as lignin, naphthalene sulfonic acid, melamine, and polycarboxylic acid, AE water reducing agent, high performance water reducing agent, or high performance AE water reducing agent can be used. Among these, polycarboxylic acid-based high-performance water reducing agents and high-performance AE water reducing agents are preferably used because they have a large water-reducing effect.
The blending amount of the water reducing agent is preferably 0.1 to 4.0 parts by mass, more preferably 0.3 to 1.5 parts by mass in terms of solid content with respect to 100 parts by mass of cement. If the blending amount is less than 0.1 parts by mass, kneading becomes difficult and the fluidity of the blend decreases, which is not preferable. When the blending amount exceeds 4.0 parts by mass, the strength development of the cured body is lowered, which is not preferable.
The water reducing agent can be used in either liquid or powder form.
The amount of water is preferably 10 to 30 parts by mass, more preferably 15 to 25 parts by mass with respect to 100 parts by mass of cement. When the amount is less than 10 parts by mass, kneading becomes difficult and the fluidity of the blend becomes low, which is not preferable. When the amount exceeds 30 parts by mass, the strength development of the cured body is lowered, which is not preferable.

In the present invention, an inorganic powder having an average particle size of 3 to 20 μm (preferably 4 to 10 μm) is included in the composition from the viewpoint of improving the fluidity of the composition and the denseness and durability of the cured product. It is preferable. By increasing the fluidity of the blend, it becomes easy to produce a cured product. Moreover, durability of a large sized container can be improved by improving the denseness and durability of a hardening body. If the average particle size of the inorganic powder is outside the above range, the effect of improving the fluidity of the blend, the denseness and durability of the cured product is reduced, which is not preferable.
Examples of the inorganic powder include slag, limestone powder, feldspar, mullite, alumina powder, quartz powder, fly ash, volcanic ash, silica sol, carbide powder, and nitride powder. Among these, slag, limestone powder, and quartz powder are preferably used in terms of cost and quality stability after curing.
The blending amount of the inorganic powder is preferably 60 parts by weight or less, more preferably 5 to 50 parts by weight with respect to 100 parts by weight of cement from the viewpoint of improving the fluidity of the blend and the denseness and durability of the cured body. Part.

In the present invention, from the viewpoint of increasing the toughness of the cured product, the compound can contain fibrous particles or flaky particles having an average particle size of 1 mm or less. Here, the particle size of the particle is the size of the maximum dimension (particularly, the length of the fibrous particle). If the average particle size of the fibrous particles or flaky particles exceeds 1 mm, the effect of increasing the toughness of the cured product is reduced, which is not preferable.
Examples of fibrous particles include wollastonite, bauxite, mullite, and examples of flaky particles include mica flakes, talc flakes, vermiculite flakes, and alumina flakes.
The blending amount of the fibrous particles or the flaky particles is preferably 35 parts by mass or less with respect to 100 parts by mass of cement, from the viewpoint of fluidity of the blend, toughness of the cured body, denseness, durability, and the like. Preferably it is 1-25 mass parts.
In addition, it is preferable to use a fibrous particle having a needle-like degree represented by a length / diameter ratio of 3 or more from the viewpoint of increasing the toughness of the cured body.

The kneading method of the material is not particularly limited, for example,
(1) A method in which materials other than water and a water reducing agent are mixed in advance to prepare a premix material, and the premix material, water and water reducing agent are charged into a mixer and kneaded;
(2) A material other than water (however, a powdery water reducing agent is used) is mixed in advance to prepare a premix material, and the premix material and water are put into a mixer and kneaded. Method;
(3) A method in which each material is individually put into a mixer and kneaded;
Etc.
As the mixer used for kneading, any type of mixer used for ordinary concrete kneading can be used, and examples thereof include an oscillating mixer, a pan-type mixer, and a biaxial kneading mixer.
After kneading, the composition is put into a predetermined mold, molded, and then cured to obtain a container body having a predetermined shape. The curing method includes air curing, underwater curing, steam curing and the like.

The physical properties of the cementitious compound used in the present invention are as follows.
The formulation used in the present invention is a flow value measured in the method described in “JIS R 5201 (Cement physical test method) 11. Flow test” without performing 15 drop motions (hereinafter referred to as “0 strikes”). The flow value is also 230 mm or more, preferably 240 mm or more, and has excellent fluidity. Therefore, it is possible to easily perform the kneading work of the blend, the work of putting the blend into the mold and molding it. In particular, in the present invention, even if the container body is, for example, a box shape having a side of 4 m or more, and the wall constituting the container body has a small thickness of about 10 cm, the composition has excellent fluidity. Since it has, a compound can be spread to every corner of the space in a formwork.
Curing of the formulation, such as expression and 130N / mm ² or more compression strength, 25 N / mm ² or more bending strength, and has a very high mechanical strength. Therefore, it is possible to reduce the thickness of the wall constituting the container body. Further, reinforcing reinforcing bars (reinforcing bars for reinforced concrete) can be made unnecessary or the amount of use can be reduced.

  Since the cured product of the above composition is very densely formed structurally, it does not allow water to permeate, for example, a liquid material contained in waste contained in the container body, It can pass through the wall of the container body and diffuse into the surrounding environment, or it can prevent moisture in the surrounding environment from entering the container body through the wall of the container body. it can. In addition, it is difficult to cause a decrease in strength due to freezing and thawing of infiltrated water in winter, as seen in ordinary concrete. Furthermore, rust does not occur in the metal fiber in the cured body, and the reinforcing effect by the metal fiber is maintained for many years.

The volume of the container body is 50 m ³ or more, preferably 70 m ³ or more, more preferably 80 m ³ or more. If the volume is less than 50 m ³ , the amount of waste accommodated becomes small, and the waste processing efficiency decreases, which is not preferable.
The upper limit value of the volume of the container body is not particularly limited, but is preferably 500 m ³ or less, more preferably 400 m ³ or less in order to enable movement of the container.
Although the shape of a container main body is not specifically limited, Preferably, it is a box shape which upper direction opened. In this case, the dimension of one side of the container body is preferably 4 m or more from the viewpoint of increasing the waste processing efficiency. Although the upper limit of this dimension is not specifically limited, From a viewpoint of the ease of movement of a container, Preferably it is less than 10m. In addition, the overall dimensions of the container body are preferably 5 to 10 m (length) x 4 to 6 m (width) x 4 to 6 m (from the viewpoint of improving the processing efficiency of waste and the ease of movement of the container. Height).

The thickness of the wall constituting the container body is preferably 7 to 13 cm, more preferably 8 to 12 cm. If the thickness is less than 7 cm, cracks or the like may occur when the container is moved. If the thickness exceeds 13 cm, the effect of improving the strength and durability of the container will reach its peak, but the production cost and mass will increase, which is not preferable.
The container body preferably includes one or more reinforcing ribs. The reinforcing rib is formed, for example, as a right triangle plate-like body interposed between the side wall and the bottom wall of the container body.
The container body may have one or more partition walls that define the internal space. For example, a container body having a dimension of 10 m (length) × 5 m (width) × 5 m (height) is provided with a partition wall at the center in the length direction, thereby providing 5 m (length) × 5 m (width). ) × 5 m (height) can be divided into two small chambers.
Reinforcing bars may be embedded in the container body. However, the amount of reinforcing bars may be smaller than when reinforcing ordinary concrete.

The lid is used to seal the waste by sealing the opening of the container main body containing the waste.
The lid is preferably formed using the same cementitious compound as the container body. Here, the “cement-based composition similar to the container body” means cement, pozzolanic fine powder having an average particle size of 1.0 μm or less, fine aggregate having a maximum particle size of 2 mm or less, metal fiber, water reducing agent, water and It means a cement-based compound containing a material (for example, an inorganic powder having an average particle size of 3 to 20 μm, a fibrous particle or a flaky particle having an average particle size of 1 mm or less, etc.) that is blended as necessary. It does not mean that the types and amounts of the components are exactly the same as the material of the container body. However, it is preferable to form the container main body and the lid with the same material from the viewpoint of simplification of the material preparation process.
In addition, the kind (specific example) of each component which comprises a cover body, a compounding quantity, etc. are the same as the material of a container main body.
When the lid is formed from the same cement-based composition as the container body, the thickness of the lid is preferably 7 to 13 cm, more preferably 8 to 12 cm, for the same reason as the container body.
The lid body may be divided into a plurality of molded bodies. For example, for a container body having a size of 10 m (length) × 5 m (width) × 5 m (height), 2 having a size of 5 m (length) × 5 m (width) × 7 to 13 cm (thickness) Two lids can be used.

As a method of fixing the lid to the container body, (a) between the container body and the lid, mortar, paste, cement adhesive (for example, epoxy resin adhesive, vinyl acetate emulsion adhesive, etc.), etc. A method of fixing by interposing a joining portion made of an adhesive material, (b) a hole for inserting a fixing tool in each of the container main body and the lid, and in a state where the container main body and the lid are combined, Examples include a method of driving and fixing a fixing tool (for example, concrete anchor) into the fixing tool insertion hole. Note that the holes for inserting the fixing tool in the method (b) are provided, for example, at the four corners of the lid and the corresponding points of the container body, and at the predetermined intervals between the four corners. Can do.
Among these, an example of a preferable method is the method (a) described above, in which a cement-based compound similar to that of the container body is used as the adhesive material.
Another example of a preferable method is a method in which the above (a) and the above (b) are combined, and a method using a cement-based compound similar to that of the container main body is used as the adhesive material.

Examples of the waste stored in the container main body include concrete sludge generated in a concrete factory, an agitator vehicle, or the like, concrete waste generated when a building or the like is destroyed, and the like. The concrete sludge may be accommodated in the container main body in a liquid state, or may be accommodated in the container main body after solidifying with a solidifying material.
The container body normally contains waste until it is full. When a space remains in the container body after the waste is stored, the space may be filled with a curable composition such as concrete or mortar.
After the waste is stored in the container main body, the waste-containing block can be obtained by fixing the cover body by fitting the lid to the opening of the container main body. At this time, as described above, a joint portion can be provided between the container body and the lid.
Waste-containing blocks are usually disposed of outdoors or buried in the soil. The waste-containing block can also be used as a wave-breaking block or the like.

  Hereinafter, the example of the large sized container of this invention is demonstrated, referring drawings. FIG. 1 is a perspective view showing components (container body and lid) as an example of a large container of the present invention, and FIG. 2 is a waste-containing block formed by filling waste in the large container shown in FIG. 3 is a plan view of the waste-containing block shown in FIG. 2, FIG. 4 is a cross-sectional view showing a state in which the waste-containing block is cut along the line AA in FIG. 3, and FIG. FIG. 6 is a cross-sectional view showing another example of the container body and lid fixing means corresponding to FIG. 4, and FIG. 6 shows the components (container body and lid) of another example of the large container of the present invention. 7 is a perspective view showing a waste-containing block formed by filling waste in the large container shown in FIG. 6, and FIG. 8 is a plan view of the waste-containing block shown in FIG. FIG. 10 is a cross-sectional view showing a state in which the waste-containing block is cut along the line BB in FIG. 8, and FIG. 10 is a view of the waste from the cross-sectional view shown in FIG. And a state except for the mortar (container body and the lid) is a sectional view showing a.

1 and 2, the large container 1 includes a box-shaped container body 2 having an upper opening, a lid 3 that can be fitted to the container body 2, and a joint 4 (see FIG. 2). In addition, the container main body 2, the cover body 3, and the junction part 4 are all formed from the same cementitious compound.
As shown in FIG. 4, the lid 3 includes an upper plate-like portion that is a portion placed on the upper surface of the side wall of the container main body 2 and a lower plate that is a portion fitted into the opening of the container main body 2. The shape part is formed integrally.
The manufacturing method of the waste containing block 6 (refer to FIG. 4) in which the waste 5 is accommodated in the large container 1 will be described. First, after the waste 5 is accommodated in the container main body 2, the container main body 2 On the upper surface of the side wall, a cement-based compound (mortar) similar to that of the container body 2 is applied at a predetermined thickness (for example, about 10 to 30 mm) to form the joint 4 before curing, and then the joint 4 When the lid 3 is placed on the lid and the lid 3 is fitted into the opening of the container body 2, the waste-containing block 6 is completed. In addition, if the boundary surface (contact surface) between the container main body 2 and the joint portion 4 and the boundary surface between the lid 3 and the joint portion 4 are formed in an uneven shape, the joining force is increased, which is preferable. .

Another example of a large container is shown in FIG. In FIG. 5, the large container 11 includes a box-shaped container main body 12 having an open top, a lid 13 that can be fitted to the container main body 12, a joint portion 14, and a fixing tool (anchor for concrete) 17. .
In addition, the container main body 12, the cover body 13, and the junction part 14 are all formed from the same cementitious compound. Each of the container body 12 and the lid body 13 is provided with a plurality of fixing tool insertion holes for inserting the fixing tools 17.
The manufacturing method of the waste-containing block 16 will be described. First, after the waste 15 is accommodated in the container main body 12, the portion of the upper surface of the side wall of the container main body 12 where the fixing tool insertion hole is located is excluded. Then, a cement-based compound (mortar) similar to that of the container body 12 is applied at a predetermined thickness (for example, about 5 to 15 mm) to form the joint 14 before curing. Next, the lid body 13 is placed on the joint portion 14, and the lid body 13 is fitted into the opening of the container body 12. Thereafter, if the fixing tool 17 is driven into the fixing tool insertion hole from above the lid body 13, the waste-containing block 16 is completed.

Other examples of large containers are shown in FIGS.
6 and 7, the large container 21 includes a box-shaped container main body 22 having an upper opening, a lid 23 that can be fitted to the container main body 22, and a joint portion 24 (see FIG. 7). In addition, the container main body 22, the lid body 23, and the joining part 24 are all formed from the same cementitious compound.
As shown in FIG. 10, the container main body 22 includes an upper surface 22a of a side wall, a vertical surface 22b that hangs downward from the inner periphery of the upper surface 22a, a horizontal surface 22c that extends horizontally inward from the lower end of the vertical surface 22b, and a horizontal surface. The vertical surface 22d hangs downward from the inner peripheral edge of 22c and the bottom surface 22e having the lower end of the vertical surface 22d as the outer peripheral edge.
The lid 23 is integrally formed with an upper plate-like portion that is a portion placed on the horizontal surface 22 c of the container main body 22 and a lower plate-like portion that is a portion fitted into the opening of the container main body 22. Being done.
More specifically, the lid body 23 includes an upper surface 23a, a vertical surface 23b that hangs downward from the outer peripheral edge of the upper surface 23a, and a horizontal surface 23c that extends horizontally inward from the lower end of the vertical surface 23b (the above surfaces are A vertical surface 23d that hangs downward from the inner periphery of the horizontal surface 23c, and a bottom surface 23e having the lower end of the vertical surface 23d as an outer periphery (the above surface is the lower plate-like shape). Forming the outline of the part.
In a state where the container main body 22 and the lid body 23 are fitted, the upper surface 22a of the container main body 22 and the upper surface 23a of the lid body 23 are separated from each other by a groove that can be filled with mortar that forms the joint portion 24 (see FIG. 9). And located on the same plane.
The manufacturing method of the waste-containing block 26 (see FIG. 9) will be described. First, after the waste 25 is stored in the container body 22, the lid body 23 is fitted into the opening of the container body 22, When a groove formed between the container main body 22 and the lid body 23 is filled with a cement-based compound (mortar) similar to that of the container main body 22 to form the joint 24, the waste-containing block 26 is formed. Complete.

Hereinafter, the present invention will be described by way of examples.
[Materials used]
The following materials were used.
(1) Cement; Low heat Portland cement (manufactured by Taiheiyo Cement; Brain specific surface area: 3,200 cm ² / g)
(2) Pozzolanic fine powder; silica fume (average particle size: 0.25 μm)
(3) Quartz powder (average particle size: 7 μm)
(4) Fine aggregate: quartz sand (maximum particle size: 0.6 mm)
(5) Water reducing agent; polycarboxylic acid-based high-performance water reducing agent (6) water; tap water (7) metal fiber; steel fiber (diameter: 0.2 mm, length: 15 mm)

[Example 1]
Low heat Portland cement 100 parts by mass, silica fume 30 parts by mass, quartz powder 32 parts by mass, fine aggregate 120 parts by mass, steel fiber (volume ratio in the composition: 2%), high performance water reducing agent 1.0 part by mass (solid Min conversion), 22 parts by mass of water was put into a biaxial mixer and kneaded to prepare a blend.
The zero stroke flow value of the blend was 250 mm.
Further, the above blend was poured into a mold (φ50 × 100 mm), allowed to stand at 20 ° C. for 48 hours, and then subjected to steam curing at 90 ° C. for 48 hours. The obtained cured bodies (three) had a compressive strength (average value) of 230 N / mm ² .
Further, the above composition was poured into a steel mold (4 × 4 × 16 cm), allowed to stand at 20 ° C. for 48 hours, and then subjected to steam curing at 90 ° C. for 48 hours. The bending strength (average value) of the obtained cured bodies (3 pieces) was 45 N / mm ² .
Further, the above blend was poured into a mold (φ50 × 100 mm), allowed to stand at 20 ° C. for 48 hours, and then subjected to steam curing at 90 ° C. for 48 hours. The water permeability coefficient of the obtained hardened body was measured by the water level permeability test method of “Geotechnical Society Standard JGS 0231 (Soil permeability test method)”. As a result, water penetration was not observed, and the water permeability coefficient was 0.

It is a perspective view which shows the component of an example of the large sized container of this invention. It is a perspective view which shows the waste containing block formed by filling a waste in the large sized container shown in FIG. It is a top view of the waste containing block shown in FIG. It is sectional drawing which shows the state which cut | disconnected the waste containing block by the AA line in FIG. It is sectional drawing which shows the other example of the fixing means of a container main body and a cover body corresponding to FIG. It is a perspective view which shows the component of the other example of the large sized container of this invention. It is a perspective view which shows the waste containing block formed by filling a waste in the large sized container shown in FIG. It is a top view of the waste content block shown in FIG. It is sectional drawing which shows the state which cut | disconnected the waste containing block by the BB line in FIG. FIG. 10 is a cross-sectional view showing a state where waste and mortar are removed from the cross-sectional view shown in FIG. 9.

Explanation of symbols

1,11,21 Large container 2,12,22 Container body 3,13,23 Lid 4,14,24 Junction 5,15,25 Waste 6,16,26 Waste containing block 17 Fixing tool

Claims (6)

A large container including a container body having a volume of 50 m ³ or more, wherein the container body is cement, fine pozzolanic powder having an average particle diameter of 1.0 μm or less, fine aggregate having a maximum particle diameter of 2 mm or less, metal fiber, water reducing agent And a large container made of a hardened cementitious compound containing water.   The large container according to claim 1, wherein the cement-based compound contains an inorganic powder having an average particle diameter of 3 to 20 μm.   The large container according to claim 1 or 2, comprising a lid made of a hardened body of a cement-based compound similar to the container body.   The large container according to claim 3, wherein the container body and the lid body have a joint portion made of a hardened body of a cementitious compound similar to the container body.   The said container main body is a box-shaped molded object whose one side is 4 m or more, and the thickness of the wall body which comprises the said container main body is 7-13 cm, The any one of Claims 1-4 Large container. A waste-containing block comprising the large container according to any one of claims 1 to 5 and a waste housed in the large container.

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