JPH07920A - Shape separation of hydraulic composition particle and aggregate and hydraulic composition particle and aggregate subjected to specific shape separation - Google Patents

Abstract

PURPOSE:To provide the method capable of separating hydraulic compsn. particles and aggretate by each of their shapes and the hydraulic compsn. particles and aggretate obtd. by this method. CONSTITUTION:Generation of differences in moving loci by the shapes of the hydraulic compsn. particles is utilized by dropping hydraulic compsn. particles assemblage consisting of hydraulic compsn. particles having various shapes or aggretate assemblage having various shapes to the position on the inclining upper side on the beginning end side in the traveling direction of a belt 3 which is extended between a pair of inclined shafts 2 and travels in one direction. The method for shape sepn. of the hydraulic compsn. particles or aggretate by selectively recovering the hydraulic compsn. particles or aggretate having at least one kind of the specific shapes among the shapes of the spherical, planar, lumpy, needle-like, columnar, bar-shaped, polygonal, pyramidal and flaky particles and the hydraulic compsn. particles and aggretate which are subjected to the specific shape sepn. and are recovered by this shape sepn. method are obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for separating the shape of hydraulic composition particles and aggregates by which the hydraulic composition particles and aggregates can be collected for each shape, and the water separated into a specific shape by the method. Hard composition particles and aggregates.

[0002]

2. Description of the Related Art Generally, cement or cement clinker,
Gypsum, slag and the like are made into products or intermediate materials by undergoing steps such as sintering, crushing, classification and drying.
By the way, when these are adjusted to their final state (product state or state used as an intermediate material), normally, no consideration is given to the particle shape, and it is simply classified and sorted only by the particle size. It is normal.

For example, in the case of producing ordinary Portland cement, limestone and clay are dried by a raw material drier, and the obtained dried limestone and dried clay are mixed and finely ground by a raw material pulverizer with kalami, and then with a preheater. (With calcination furnace)
Cement clinker is obtained by preheating, calcination and sintering in a rotary kiln. Then, after cooling the cement clinker with an air quenching cooler, the cement clinker and gypsum are mixed, finely pulverized with a finishing powder machine, and further classified to obtain cement. That is, in the final step, cement clinker and gypsum are mixed and finely crushed with cement clinker and gypsum using a medium such as a ball or mill hep in a finishing powder machine to obtain cement, but the finely pulverized cement has its particles. Various shapes such as spherical, needle-shaped, plate-shaped, column-shaped, rod-shaped, lump-shaped, polygonal, polygonal pyramid, scale-shaped and other shaped particles are mixed, and these shapes are not considered at all and random without regularity. It is usually mixed in.

However, in such hydraulic composition particles such as ordinary Portland cement, it is necessary to simply classify the particle size and adjust the particle size, and do not adjust the particle shape at all. Therefore, its packing property and fluidity become non-uniform, so unless the composition and chemical structure of individual particles are changed, higher strength such as high compressive strength, high tensile strength and high bending strength cannot be obtained. In reality, it is not possible to obtain a product with high fluidity. In addition, since the hydraulic composition itself does not have high strength as described above, the cured product and the structure obtained therefrom naturally do not have high strength.

On the other hand, various aggregates mixed in cement compositions, mortar, concrete and ready-mixed concrete are collected from rivers, the sea, mountains, or quarried and crushed before use. By the way, when these are adjusted to their final state (product state or state used as an intermediate material), normally, no consideration is given to the particle shape, and it is simply classified and sorted only by the particle size. It is normal.

For example, when mortar or concrete is produced using ordinary Portland cement, ordinary Portland cement is mixed with sand and water to obtain mortar, and ordinary Portland cement is mixed with sand, gravel and water. Concrete and ready-mixed concrete are produced respectively, but the particle size of sand or gravel, which is an aggregate, is adjusted, but the shape thereof is not considered at all.

However, in such an aggregate, the size and the particle size of the aggregate are merely adjusted and the shape is not adjusted. Therefore, the filling property and the fluidity are nonuniform, and therefore, For example, the properties of mortar and concrete mixed with it are not improved, for example, the fluidity, and the cured product obtained from this is still the same tensile strength, bending strength and compressive strength as before. is there.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for separating hydraulic composition particles and aggregates according to their shapes, and a method for obtaining the same. The present invention is to provide a hydraulic composition particle and an aggregate.

[0009]

[Means for Solving the Problems] Claim 1 in the present invention
In the method for separating the shape of the hydraulic composition particles described above, the hydraulic composition having various shapes at the position on the upper side of the inclination of the starting end side in the traveling direction of the belt which is stretched between a pair of inclined shafts and travels in one direction. The hydraulic composition particle aggregate consisting of solid particles is dropped, and by utilizing the fact that the movement locus is different depending on the shape of the hydraulic composition particle, spherical, plate-like, or massive from the hydraulic composition particle aggregate The selective solution of the hydraulic composition particles having at least one specific shape among the shapes of acicular, columnar, rod-shaped, polygonal, polygonal pyramidal, and scaly particles was the means for solving the above problems.

The hydraulic composition particles having the specific shape separated according to claim 7 are obtained by separating and recovering the hydraulic composition particles by the method for separating the shape of the hydraulic composition particles.

[0011] In the hydraulic composition cured product or hydraulic composition cured product construct according to claim 9, it is composed of particles having a specific shape of at least one of spherical, lumpy, polygonal and polygonal pyramidal, or spherical or lumpy. , A polygonal shape, a hydraulic composition having at least one characteristic of high compressive strength and high fluidity characterized by containing more particles of at least one specific shape among polygonal shape, and an aggregate. What was obtained by curing a mixture with water was taken as a means for solving the above problems.

According to the eleventh aspect of the present invention, there is provided a cured hydraulic composition or a cured hydraulic composition construct which has a columnar shape, a rod shape, a needle shape,
Plate-shaped, consisting of particles of at least one specific shape among scales, or columnar, rod-shaped, needle-shaped, plate-shaped, characterized by comprising more particles of at least one specific shape among scales high The solution to the above problems was obtained by curing a mixture of a hydraulic composition having at least one of tensile strength and high bending strength, an aggregate and water.

The expression "more" here means
High compressive strength, in the case of a hydraulic composition having at least one of the characteristics of high fluidity, the total amount of at least one particle among spherical, lumpy, polygonal, and polygonal pyramid shape among the shapes other than these specific shapes. It means that it is preferable that the total amount of at least one particle is greater than the total amount, and in the case of a hydraulic composition having at least one characteristic of high tensile strength and high bending strength, a plate shape, a needle shape, a column shape, This means that it is desirable that the total amount of at least one particle of the rod-like and scale-like particles is larger than the total amount of at least one particle of the shapes other than these specific shapes.
Further, the amount (and ratio) of at least one particle in the specific shape in the hydraulic composition is more than the known amount (and ratio) in each shape particle in the known commercially available hydraulic composition. You can include more. Also,
The hydraulic composition particles that are collected by the method for separating the shape of the hydraulic composition particles and have a polygonal shape or a polygonal pyramid shape are preferably in the shape of a sphere or a cube.

In the method of separating the shape of aggregate according to the twelfth aspect, various shapes are provided at a position on the upper side of the inclination on the starting end side in the traveling direction of the belt which is stretched between a pair of inclined shafts and travels in one direction. By utilizing the fact that the aggregate aggregate made of aggregate is dropped and the movement locus varies depending on the shape of aggregate, spherical, plate-like, lump-like, needle-like, columnar, rod-like, polygon The means for solving the above problems is to selectively collect at least one aggregate having a specific shape from among the shapes, the polygonal pyramid shape, and the scale-like aggregate shape.

The aggregate obtained by the specific shape separation according to claim 19 is obtained by being separated and collected by the shape separation method of the aggregate, which is the means for solving the above problems.

[0016] The hydraulic composition cured product or hydraulic composition cured product construct according to claim 21 is composed of particles having a specific shape of at least one of spherical, lumpy, polygonal and polygonal pyramidal, or spherical or lumpy. , A polygonal shape, an aggregate having at least one characteristic of high compressive strength and high fluidity, characterized by containing more particles of at least one specific shape among polygonal shape, and a hydraulic composition What was obtained by curing a mixture with water was taken as a means for solving the above problems.

In the hydraulic composition cured product or hydraulic composition cured product construct according to claim 23, columnar, rod-shaped, needle-shaped,
Plate-shaped, consisting of particles of at least one specific shape among scales, or columnar, rod-shaped, needle-shaped, plate-shaped, characterized by comprising more particles of at least one specific shape among scales high The solution to the above problems was obtained by curing a mixture of an aggregate having at least one of tensile strength and high bending strength, a hydraulic composition, and water.

The term "more" here means
In the case of an aggregate having at least one characteristic of high compressive strength and high fluidity, the total amount of at least one particle among spherical, lumpy, polygonal, and polygonal pyramid is at least one of shapes other than these specific shapes. It means that it is desirable to have more than the total amount of three particles, and in the case of an aggregate having at least one of high tensile strength and high bending strength, plate-like, needle-like, columnar, rod-like, and scale-like shapes. It means that it is desirable that the total amount of at least one particle is larger than the total amount of particles of at least one shape other than these specific shapes. Further, the amount (and ratio) of at least one particle in the specific shape in the aggregate is more than the known amount (and ratio) in at least one shape particle in each of the known commercially available aggregate aggregates. Good. Further, the aggregate collected by the aggregate shape separating method of the present invention and having a polygonal shape or a polygonal pyramid shape preferably has a shape close to a spherical shape or a cubic shape. The hydraulic composition cured product or hydraulic composition cured product construct of the present invention is, for example, in the case of cement, cement mortar cured product, raw cement concrete cured product, cement concrete cured product, cement mortar cured product construct,
Not only the raw cement concrete hardened structure and the cement concrete hardened structure are included, but also other hydraulic compositions are included.

The present invention will be described in detail below. First, the method for separating the shape of the hydraulic composition particles of the present invention will be described. In the method for separating the shape of the hydraulic composition particles, the hydraulic composition particles are sorted by using an inclined belt conveyor 1 as shown in FIG. 1, for example. In the present invention, the hydraulic composition includes cement, cement clinker, gypsum, blast furnace slag, converter slag, fly ash, silica stone, silica fume, soil improver, destructive material, expansive material, lime, etc. It shall be one or more selected. In addition, concretely, as the cement, ordinary Portland cement, blast furnace cement, fly ash cement,
Examples include ultra fast cement, ultra fast cement, fast cement, low exothermic cement, expansive cement, oil well cement, seawater resistant cement, silica cement, acid resistant cement, and cement for ALC. Furthermore, specifically as a cement clinker, a clinker for ordinary Portland cement, a clinker for blast furnace cement, a clinker for ultra-fast cement, a super-hard cement clinker,
Examples include clinker for early strong cement, clinker for low heat generation, clinker for fat cement, clinker for oil well cement, seawater resistant cement clinker, clinker for heat resistant cement, cement clinker for ALC and the like.

The belt conveyor 1 has a pair of slanted shafts 2, a belt 3 stretched between the shafts 2 and traveling in one direction, and an upper side of the slanted upper side on the starting end side of the belt 3 in the traveling direction. The hopper 4 provided and the particle recovery tanks A, B, C, D, E, F, G, which are provided below the inclined lower side peripheral edge 3a of the belt 3 and are respectively separated,
H and I, and particle recovery tanks J, K, and L provided below the trailing end of the belt 3 in the traveling direction.

Both ends of the pair of shafts 2 are fixed by bearings or the like so as to be rotatable. The degree of inclination of the pair of shafts 2 is preferably within a range in which an angle θ formed by the central axis G of the shaft 2 and the installation surface 7 of the belt conveyor 1 is 30 to 60 ° as shown in FIG. The selection is not necessarily limited to this, and may be appropriately selected depending on the hydraulic composition particle aggregate including hydraulic composition particles having various shapes to be put into the hopper 4 and the material of the belt 3 described later.

On the surface 3b of the belt 3, the hydraulic composition particles having various shapes forming the hydraulic composition particle aggregates dropped from the hopper 4 are rolled to form the hydraulic composition particles in the shape. And is made of rubber, plastic, cloth, metal, alloy, or the like. Since the belt 3 is stretched between the pair of shafts 2, the angle formed by the surface 3b of the belt 3 and the installation surface 7 of the belt conveyor 1 is substantially the same as the angle θ of the shaft 2. . The traveling speed of the belt 3 is appropriately selected depending on the shape of the hydraulic composition particles forming the hydraulic composition particle aggregate to be introduced into the hopper 4, the material of the belt 3 described below, and the inclination angle of the belt 3. The surface 3b of the belt 3 may have one or more strip-shaped surface smooth portions. As a material for the smooth surface portion, a metal or alloy such as gold, aluminum, silver, copper, stainless steel, or Shinchu is used. When such a smooth surface portion is formed on the belt 3,
This is because the hydraulic composition particles are efficiently separated according to their shape. Further, the surface 3b of the belt 3 may be formed with at least one roughness. By providing the roughness of the belt surface on at least a part of the belt surface, the shape separation efficiency can be improved.

The hopper 4 is provided with an inlet 4a for introducing a hydraulic composition particle aggregate made of hydraulic composition particles having various shapes into the hopper 4, and the aggregate to the belt 3 described above. A drop port 4b is formed for dropping to a position on the upper side of the slope on the starting end side in the traveling direction of. Here, an example has been described in which the hopper 4 is arranged above the upper slope of the starting end side in the traveling direction of the belt 3, but the present invention is not limited to this.

In order to separate the hydraulic composition particles in the shape using such a belt conveyor 1, first, the belt 3 is run in one direction at a speed within the above-mentioned preferable range to form various shapes. The hydraulic composition particle aggregate 10 including the hydraulic composition particles is charged into the hopper 4 through the charging port 4a, and the aggregate 10 travels on the surface 3b of the belt 3 through the dropping port 4b. Drop it to a position on the upper side of the slope on the starting side of the direction. By doing so, the hydraulic composition particle aggregate 10 rolls on the surface 3b of the belt 3 and moves to the lower peripheral edge 3a of the belt 3 and then falls out of the belt 3a. At that time, the hydraulic composition The hydraulic composition particles of various shapes forming the particle aggregate 10 have different motion trajectories depending on their shapes. That is, since the slippery spherical particles fall substantially straight toward the lower end side of the inclination of the belt 3, a locus L1 is drawn, and thereafter, particles in the shape of lumps, polygons, and polygonal pyramids are collected in the recovery tanks A, B, C, D. , The shape is separated in the E direction, and at least one particle among a lump, a polygon, a polygonal pyramid, a column, a rod, a needle, a plate, and a scale has a curved locus L.
Draw 2, L3, L4, L5, L6, L7, L8, L9. Here, particles having a large frictional resistance with the belt, for example, plate-like, column-like,
The rod-shaped and scale-shaped particles move on the belt over time and move, and the right hand (collection tanks F, G, H, and
I, J, K, L) and the shapes are separated. Further, preferably, a slippery spherical particle draws a locus L1 and then becomes a slippery particle, that is, a lump, a polygon,
The polygonal pyramidal, columnar, rod-shaped, needle-shaped, plate-shaped, and scale-shaped particles draw curved loci L2, L3, L4, L5, L6, L7, L8, and L9. On the extension lines of the loci L1 to L9, the particle collecting tanks A to I are installed below the inclined lower side peripheral edge of the belt 3, and the particle collecting tanks J to J are provided below the end side in the running direction of the belt 3. When it is set to L, the hydraulic composition particles dropped from the belt 3 can be separated and collected depending on the shape.

In this way, each specific shape, that is, a spherical shape,
Plate-shaped, lump-shaped, needle-shaped, column-shaped, rod-shaped, polygonal, polygonal pyramid, since it is possible to separate and collect hydraulic composition particles for each shape, for example, using cement particles as hydraulic composition particles, of this As the shape, for example, spherical, massive,
Polygonal shape, a hydraulic composition consisting of particles of a specific shape consisting of at least one of polygonal pyramids, or by adjusting to a hydraulic composition mainly composed of particles of the specific shape, the hydraulic composition A cement having at least one of high compressive strength and high fluidity can be used.

Similarly, for example, a hydraulic composition comprising particles having a specific shape of at least one of spherical, plate-like, needle-like, columnar, rod-like, polygonal, polygonal pyramidal, lump-like, and scale-like, or these specifics At least one of high compressive strength and high fluidity is obtained by adjusting a hydraulic composition mainly composed of shaped particles, for example, spherical, lumpy, polygonal, or polygonal pyramidal in order to contain more of them. A hydraulic composition having one property can be obtained, and at least one of plate-like, needle-like, columnar, rod-like, and scale-like high tensile strength and high bending strength can be obtained by including more. A hydraulic composition having two characteristics is obtained.

Cement mortar having at least one of high compressive strength, high fluidity, high tensile strength and high bending strength can be prepared from these cement, water and fine aggregate. By adding coarse aggregate to this, it is possible to obtain cement concrete or green cement concrete having at least one of high compressive strength, high fluidity, high tensile strength and high bending strength. And further, by hardening this cement mortar, cement concrete and green cement concrete into a predetermined shape, high compressive strength, high tensile strength and high bending strength cement concrete hardened body having at least one characteristic, hardened cement mortar or It is possible to obtain a hardened cement concrete,
By constructing these hardened cement concrete bodies in a predetermined structure, it is possible to obtain a hardened cement concrete concrete structure having at least one of high compressive strength, high tensile strength and high bending strength.

The method for separating the shape of the hydraulic composition particles is as follows:
Since it is a rotating belt system, the hydraulic composition particles for each specific shape, that is, spherical, plate-like, lump-like, needle-like, columnar, rod-like,
Since it is possible to easily separate and collect each shape such as a polygonal shape, a polygonal pyramid shape, and a scale shape, it is suitable for mass production of hydraulic composition particles separated for each such specific shape. Further, since the hydraulic composition particles for each specific shape can be collected, the quality of the material as the hydraulic composition can be improved, and the handling property and fluidity of the particle group can be improved. In particular, when cement is used as the hydraulic composition, cement mortar and cement concrete (including fresh cement concrete) obtained from it by appropriately selecting its specific shape have high compressive strength, high tensile strength and high bending strength. And having at least one of high fluidity. Therefore, for example, with high-fluidity cement mortar or cement concrete (including fresh cement concrete), work efficiency such as casting can be improved,
This will greatly contribute to labor saving. In addition, when cement mortar or cement concrete with high compressive strength is used and its hardened body is formed, the thickness of the hardened body is significantly thinner than the conventional one if the strength is equivalent to the conventional one. It is possible to reduce the weight. Furthermore, when cement mortar or cement concrete (including fresh cement concrete) that has at least one of high tensile strength and high flexural strength is used to form a hardened product, the use of conventional cement hardened products is greatly improved. In some cases, it will be possible to replace at least part of the fields of plastics, aluminum, iron, and non-ferrous metals.

Next, the method for separating the shape of the aggregate of the present invention will be described. This method for separating the shape of the aggregate is performed by using the hydraulic composition particle aggregate 10 in the hopper 4 of the belt conveyor 1 of FIG.
The method for separating the shape of the hydraulic composition particles is the same as the method for separating the shape of the hydraulic composition particles, except that the aggregate aggregate 20 made of aggregates having various shapes is introduced instead of the above.

In the present invention, aggregate means coarse aggregate,
It is selected from at least one of fine aggregate, blast furnace slag, converter slag, fly ash, limestone, silica stone, silica fume, and artificial lightweight aggregate. Specific examples of the coarse aggregate include natural gravel such as river gravel, sea gravel, and mountain gravel, and gravel made by quarrying. Specific examples of the fine aggregate include natural sand such as river sand, sea sand, and mountain sand, and sand produced by quarrying. As the blast furnace slag, converter slag, fly ash, silica stone, silica fume, and artificial lightweight aggregate, those made of commonly known materials can be mentioned.

According to this aggregate shape separation method, aggregates are classified into specific shapes, that is, spherical, plate-like, lump-like, needle-like, columnar, rod-like,
Since it is possible to easily separate and collect each shape such as a polygonal shape, a polygonal pyramid shape, and a scale shape, it is suitable for mass production of aggregates separated into such specific shapes. In addition, since aggregates for each specific shape can be collected, for example, spherical, block,
A cement mortar having at least one of high compressive strength and high fluidity by mixing at least one aggregate of polygonal shape and polygonal pyramidal shape and mixing and hardening the aggregate with water. Or cement concrete or green concrete can be obtained, and further, when using cement mortar or cement concrete or green concrete having at least one of these high compressive strength and high fluidity, when a hardened body thereof is formed,
Hardened cement mortar, hardened cement concrete (hardened concrete containing the same), hardened cement mortar structure and hardened concrete cement concrete (hard green containing the same) having at least one of high compressive strength and high fluidity A cured body construct) can be obtained. Further, by including a greater amount of at least one of plate-shaped, needle-shaped, column-shaped, rod-shaped, and scaly-shaped aggregates, high tensile strength and high bending can be achieved by mixing and hardening the aggregates with cement and water. It is possible to obtain cement mortar or cement concrete (including green concrete) having at least one characteristic of strength, and further, cement mortar or cement concrete (including green concrete) having at least one of these high tensile strength and high bending strength. When a hardened body is formed by using (concrete), a hardened cement mortar body or a hardened cement concrete concrete (including a hardened concrete concrete) having at least one of high tensile strength and high bending strength, and It is possible to obtain hardened cement mortar structure and hardened cement concrete concrete structure. , Improve the quality of the material as an aggregate, it is possible to improve the handling properties and flowability of the particles.

In the present invention, the hardened cement mortar, hardened cement concrete and hardened fresh cement concrete include all known hardened cement mortar and hardened cement concrete widely used in the field of civil engineering and construction. Raw cement concrete hardened body)
And U-shaped grooves, secondary cement concrete products, various blocks, tiles, prestressed concrete, various concrete building materials, and hardened concrete for civil engineering. Further, the cement mortar hardened body structure, the cement concrete hardened body structure is all structures made in the civil engineering and construction industry, for example, low, middle and high-rise buildings, condominiums, single-family houses, wave-dissipating blocks, wave-proof structures, River or sea revetment or embankment, bridge, road, railway, airport, runway, factory, school, public hall, gymnasium, dome, library,
Museums, art galleries, baseball fields, nuclear power plants, hydroelectric power plants,
It includes all structures and structures made of hardened concrete such as known concrete structures such as thermal power plants, dams and tunnels, and also includes secondary concrete products, ALC concrete, fume pipes, concrete panels and the like.

[0033]

EXAMPLES The present invention will be described in more detail below with reference to examples. (Example 1) Using the inclined belt conveyor 1 shown in FIG. 1, a belt 3 of the inclined belt conveyor 1 is run in one direction, and ordinary Portland cement composed of particles of various shapes is introduced into the hopper 4 through an inlet 4a. The ordinary Portland cement was dropped from the dropping port 4b onto the surface 3b of the belt 3 to a position on the upper side of the slope of the starting end side of the belt 3 in the running direction.
Then, the ordinary Portland cement particles moved to the peripheral edge 3a on the lower side of the slope while rolling on the surface 3b of the belt 3, and then dropped outside the belt 3. At this time, the spherical particles fall substantially straight toward the lower end side of the inclination of the belt 3 to draw a locus L1, and then the particles in the shape of a lump, a polygon, or a pyramid are collected in the collecting tanks A, B, C, D, The shape L is separated in the direction of E, and at least one particle among a lump, a polygon, a polygonal pyramid, a column, a rod, a needle, a plate, and a scale has a curved locus L.
2, L3, L4, L5, L6, L7, L8, L9 were drawn. Preferably, a slippery spherical particle draws a locus L1 and then becomes a slippery particle, that is, a lump, a polygon,
The polygonal pyramidal, columnar, rod-shaped, needle-shaped, plate-shaped, and scale-shaped particles draw curved loci L2, L3, L4, L5, L6, L7, L8, and L9. Then, at least one of the particle recovery tanks A to I arranged below the inclined lower side peripheral edge of the belt 3 on the extension line of the above-mentioned loci L1 to L9 is a block, a polygon, a polygonal pyramid, a column, or a rod. Ordinary Portland cement with a specific shape such as, needle-shaped, plate-shaped, and scale-shaped was separated and collected.
Particles with high frictional resistance with the belt, such as plate-like, columnar,
The rod-shaped and scale-shaped particles move on the belt over time and move, and the right hand (collection tanks F, G, H, and
I, J, K, L) and the shapes are separated.

The ordinary Portland cement thus separated and recovered was blended in the following proportions for each shape to obtain ordinary Portland cement having each characteristic. (1) High compressive strength / high fluidity Ordinary Portland cement Spherical Portland cement particles 50% by weight Agglomerate Portland cement particles 10% by weight Portland cement particles in other shapes 40% by weight (2) High tensile strength / high bending strength Ordinary Portland cement Plate-shaped Portland cement particles 40% by weight Needle-shaped Portland cement particles 10% by weight Rod-shaped Portland cement particles 10% by weight Portland cement particles of other shapes 40% by weight (3) High compressive strength / high tensile strength / high bending strength / high flow Properties Normal Portland cement Spherical Portland cement particles 20% by weight Aggregate Portland cement particles 5% by weight Plate portland cement particles 20% by weight Columnar portland cement particles 10% by weight Needle-shaped Portland cement particles 5% by weight Other shapes Portland cement particles 40% by weight

Example 2 (1) to (1) obtained in Example 1
In addition to each Portland cement of (3), the conventional commercially available ordinary Portland cement (4) was mixed with the concrete shown in Table 1 according to JIS, and the slump value (fluidity) and compression strength (JIS A 110
8), tensile strength and bending strength were tested. The obtained results are shown in Tables 2-9. Table 10 shows the physical properties of the commercially available fine aggregate and coarse aggregate used in the blending. (4) Conventional commercially available ordinary Portland cement Spherical Portland cement particles 5% by weight Aggregate Portland cement particles 10% by weight Polygonal portland cement particles 10% by weight Plate portland cement particles 10% by weight Rod portland cement particles 5% by weight Other shapes Portland cement particles 60% by weight

[0036]

[Table 1]

[0037]

[Table 2]

[0038]

[Table 3]

[0039]

[Table 4]

[0040]

[Table 5]

[0041]

[Table 6]

[0042]

[Table 7]

[0043]

[Table 8]

[0044]

[Table 9]

[0045]

[Table 10]

From the results shown in Tables 2 to 9, the fluidity (measured slump value) and the fluidity (measured slump value) of the products of Examples 1 to 3 were respectively higher than those of the conventional product (4). It was confirmed that it was excellent in compressive strength, tensile strength and bending strength, or all of these.

In Example 1, the shaped particles obtained by previously separating and collecting particles having a specific shape were blended as described above, but the present invention is not limited to such a method, and the belt conveyor shown in FIG. It is also possible to obtain particles for each specific shape by using the belt conveyor 1 in which one or more strip-shaped smooth surface portions are formed on the surface 3b of the first belt 3.

(Embodiment 3) The inclined belt conveyor 1 shown in FIG. 1 is used, and the belt 3 is run in one direction.
The coarse aggregate (quarry, produced by Iwase) shown in Table 10 having various shapes is put into the hopper 4 from the feeding port 4a, and the coarse aggregate is fed from the dropping port 4b onto the surface 3b of the belt 3. 3 was dropped to a position on the upper side of the slope on the starting end side in the traveling direction.
Then, the coarse aggregate rolled on the surface 3b of the belt 3 and moved to the peripheral edge 3a on the lower side of the slope, and then fell outside the belt 3. At this time, the spherical particles fall substantially straight toward the lower end side of the inclination of the belt 3 to draw a locus L1, and thereafter aggregates having a lump shape, a polygonal shape, or a polygonal pyramid shape are collected in the collecting tanks A, B, and C.
Shapes are separated in the directions D and E, and at least one aggregate among the aggregated, polygonal, polygonal pyramidal, columnar, rod-shaped, needle-shaped, plate-shaped, and scale-shaped particles has a curved locus L2, L3, L4, L5, L
6, L7, L8, L9 were drawn. Then, the above loci L1 to L9
On at least one of the particle collection tanks A to I arranged below the inclined lower side peripheral edge of the belt 3 on the extension line of, the shape of a block, the shape of a polygon, the shape of a polygon, the shape of a column, the shape of a rod, the shape of a needle, the shape of a plate,
The coarse aggregate having a specific shape such as scales was separated and collected. Particles having a large frictional resistance with the belt, such as plate-shaped, rod-shaped, column-shaped, and scale-shaped aggregates, move on the belt over time, and move in the right hand (collection tanks F, G, H, I) of the belt running method. , J,
K, L), and the shapes are separated.

The coarse aggregates thus separated and collected were blended in the following proportions for each shape to obtain coarse aggregates having respective characteristics. (5) High compressive strength and high fluidity coarse aggregate 50% by weight Spherical gravel 50% by weight Aggregate gravel 10% by weight Other shapes gravel 40% by weight (6) High tensile strength / high bending strength coarse aggregate Plate gravel 40% by weight Needle gravel 10% by weight Rod gravel 10% by weight Other shapes gravel 40% by weight (7) High compressive strength, high tensile strength, high bending strength, high fluidity gravel Spherical gravel 20% by weight Agglomerate 5% by weight Plate-like Gravel 20 wt% Columnar gravel 10 wt% Needle gravel 5 wt% Other gravel 40 wt%

(Example 4) Example 3 (5)
In addition to the coarse aggregates of (7), the conventional commercially available coarse aggregates (8) having physical properties shown in Table 10 before shape separation and recovery are respectively converted to conventional commercially available ordinary Portland cement (4) according to JIS. In addition, water was added and the concrete composition shown in Table 1 was performed. The slump value (fluidity), compressive strength (JIS A 1108), tensile strength, and
A bending strength test was conducted. The obtained results are shown in Table 11 to Table 1.
8 shows. The physical properties of the fine aggregate used in the compounding are also shown in Table 10. (8) Conventional commercial aggregate Spherical gravel 5% by weight Aggregate gravel 10% by weight Polygonal gravel 10% by weight Plate gravel 10% by weight Rod gravel 5% by weight Other shapes gravel 60% by weight

[0051]

[Table 11]

[0052]

[Table 12]

[0053]

[Table 13]

[0054]

[Table 14]

[0055]

[Table 15]

[0056]

[Table 16]

[0057]

[Table 17]

[0058]

[Table 18]

From the results shown in Tables 11 to 18, the blends of the coarse aggregates of the products (5) to (7) of the present example are more flowable than the blends of the conventional commercially available coarse aggregate (8). It was confirmed that the material has excellent properties (actual slump) and compression strength, or tensile strength and bending strength, or all of these.

In Example 3, the shaped particles obtained by separating and collecting particles having a specific shape in advance were blended as described above, but the present invention is not limited to such a method, and the belt conveyor shown in FIG. It is also possible to obtain particles for each specific shape by using the belt conveyor 1 in which one or more strip-shaped smooth surface portions are formed on the surface 3b of the first belt 3. In the present invention, the surface of the belt may be formed with at least one roughness, and by providing the roughness of the belt surface on at least a part of the belt surface,
The shape separation efficiency can be improved.

[0061]

As described above, since the method for separating the shape of the hydraulic composition particles of the present invention is a rotating belt system, the hydraulic composition particles for each specific shape are specified, that is, spherical,
Plate-shaped, lump-shaped, needle-shaped, column-shaped, rod-shaped, polygonal, polygonal pyramid-shaped, and scale-shaped particles can be easily separated and recovered, and thus hydraulic composition particles separated for each specific shape. It is suitable for mass production. Therefore, the hydraulic composition particles obtained by this shape separation method can improve the quality of the material as the hydraulic composition, improve the handling property and fluidity of the particle group, and stabilize the quality of the obtained product. It will contribute to functionalization and weight saving.

In particular, when cement is used as the hydraulic composition, cement mortar and cement concrete (including fresh cement concrete) obtained from the cement by appropriately selecting its specific shape have high compressive strength, high flexural strength and It has at least one of the characteristics of high fluidity. Therefore, for example, in the case of high-fluidity cement mortar or cement concrete (including fresh cement concrete), work such as placing can be made more efficient, which greatly contributes to labor saving. In addition, when cement mortar or cement concrete with high compressive strength (including green cement concrete) is used to form a hardened product, the thickness of the hardened product is It can be made significantly thinner than that of the object, and its weight can be reduced. Furthermore, when cement mortar or cement concrete (including fresh cement concrete) that has at least one of high tensile strength and high flexural strength is used to form a hardened product, the use of conventional cement hardened products is greatly improved. Can be expanded to.

Further, the aggregate shape separation method of the present invention can be applied to specific shapes of aggregates, that is, spherical, plate-like, lump-like, needle-like, column-like, rod-like, polygonal, polygonal pyramidal, and scale-like shapes. Since it can be easily separated and recovered, it is preferably used for mass production of aggregates separated into such specific shapes. Therefore, the aggregate obtained by this shape separation method can improve the quality of the material as the aggregate, improve the handling property and fluidity of the particle group, and contribute to the quality stabilization and functionalization of the obtained product. It will be done. Further, for example, by appropriately mixing the aggregates of these specific shapes and adding them to a cement mixture, for example, mortar or concrete (including green concrete), the fluidity of the obtained mortar or concrete (including green concrete) is increased. And further the strength of these cured products, for example compressive strength,
At least one of tensile strength and bending strength can be enhanced. Since mortar and concrete (including green concrete) can have at least one of high compressive strength, high tensile strength, high bending strength and high fluidity, for example, high fluidity mortar or concrete. Will improve the efficiency of work such as placing, and will greatly contribute to labor saving. If mortar or concrete with high compressive strength (including green concrete) is used and its hardened body is formed, the thickness of the hardened body will be smaller than that of the conventional one if the strength is equivalent to the conventional one. It can be made thin and its weight can be reduced. Furthermore, when mortar or concrete having at least one of high tensile strength and high bending strength is used to form a hardened body of the mortar or concrete, the use of the conventional cement hardened body can be greatly expanded. Since the hydraulic composition particles and aggregate of the present invention are shape-separated as described above, they have at least one characteristic of high compression strength, high fluidity, high bending strength, and high tensile strength. Therefore, when these are used, the amount of use of these used materials is reduced at present, so that not only the transportation cost but also the construction cost can be reduced, and the electric power consumption rate for producing them can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a belt conveyor used in the present invention.

FIG. 2 is a side view of the belt conveyor of FIG. 1 viewed from a direction of arrows II-II.

[Explanation of symbols]

1 ... Belt conveyor, 2 ... A pair of shafts, 3 ... Belt, 3b ... Surface, 4 ... Hopper, L1 ... Locus, L2 ...
Locus, L3 ... locus, L4 ... locus, L5 ... locus, L6 ... locus, L7 ... locus, L8 ... locus, L9 ... locus

Claims (23)

[Claims] 1. A hydraulic composition comprising hydraulic composition particles having various shapes at a position on an upper side of an inclination of a starting end side of a traveling direction of a belt which is stretched between a pair of inclined shafts and travels in one direction. Dropping the particle aggregate, by utilizing the difference in the movement trajectory due to the shape of the hydraulic composition particles, spherical from the hydraulic composition particle aggregate,
Plate-shaped, lump-shaped, needle-shaped, column-shaped, rod-shaped, polygonal, polygonal pyramid, scale-shaped particles of at least one specific shape hydraulic composition characterized by selectively collecting the hydraulic composition particles Shape separation method of composition particles. 2. The method for separating the shape of hydraulic composition particles according to claim 1, wherein the belt is provided with one or more strip-shaped smooth surface portions. Separation method. 3. The method for separating the shape of hydraulic composition particles according to claim 1, wherein the surface of the belt is formed with at least one roughness. . 4. The method for separating the shape of hydraulic composition particles according to any one of claims 1 to 3, wherein the hydraulic composition is cement, cement clinker, gypsum, blast furnace slag, converter slag, or fly. A method for separating the shape of hydraulic composition particles, which is at least one of ash, silica stone, silica fume, soil conditioner, destructive material, expansive material, and lime. 5. The method for separating the shape of hydraulic composition particles according to any one of claims 1 to 3, wherein the hydraulic composition particles are at least spherical, lumpy, polygonal or polygonal pyramidal. High compressive strength, containing one or more
A method for shape separation of hydraulic composition particles having at least one characteristic of high fluidity. 6. The method for separating the shape of hydraulic composition particles according to claim 1, wherein the hydraulic composition particles are plate-shaped, needle-shaped, column-shaped, rod-shaped, or scale-shaped. A method for separating the shape of a hydraulic composition particle having at least one of high tensile strength and high flexural strength containing at least one kind or more. 7. Specific shape-separated hydraulic composition particles obtained by separating and recovering by the method of separating hydraulic composition particles according to any one of claims 1 to 6. 8. A particle comprising at least one specific shape among spherical, lump, polygonal and polygonal pyramidal shapes, or more particles having at least one specific shape among spherical, lumpy, polygonal and polygonal pyramidal shapes. A hydraulic composition comprising at least one of high compressive strength and high fluidity. 9. A hydraulic composition having at least one of high compressive strength and high fluidity, which is obtained by curing a mixture of the hydraulic composition of claim 8, an aggregate and water. A cured product of a composition or a cured product of a hydraulic composition. 10. A particle having a specific shape of at least one of a columnar shape, a rod shape, a needle shape, a plate shape and a scale shape, or a particle having a specific shape of at least one of a column shape, a rod shape, a needle shape, a plate shape and a scale shape. A hydraulic composition having at least one of high tensile strength and high flexural strength, characterized by containing more of 11. A hydraulic property having at least one of high tensile strength and high bending strength, which is obtained by curing a mixture of the hydraulic composition of claim 10, an aggregate and water. A cured product of a composition or a cured product of a hydraulic composition. 12. An aggregate aggregate made of aggregates having various shapes is dropped at a position on an upper side of an inclination of a starting end side in a traveling direction of a belt which is stretched between a pair of inclined shafts and travels in one direction. , By utilizing the difference in the motion trajectory due to the shape of the aggregate,
Spherical, plate-shaped, lump-shaped, needle-shaped, column-shaped from among the aggregate aggregates,
A method for separating a shape of an aggregate, which comprises selectively collecting at least one aggregate having a specific shape among rod-like, polygonal, polygonal pyramidal, and scaly aggregates. 13. The method for separating the shape of aggregate according to claim 12, wherein one or more strip-shaped surface smooth portions are formed on the belt. 14. The aggregate shape separating method according to claim 12, wherein the surface of the belt is formed with at least one roughness. 15. The aggregate shape separating method according to claim 12, wherein the aggregate is cement, mortar or concrete aggregate. 16. The method for separating the shape of an aggregate according to claim 12, wherein the aggregate is spherical.
A method for separating a shape of an aggregate having at least one of high compressive strength and high fluidity, which contains at least one of a lump shape, a polygonal shape, and a polygonal pyramid shape. 17. The method for separating the shape of aggregate according to claim 12, wherein the aggregate is plate-shaped,
A method for separating the shape of an aggregate having at least one of high tensile strength and high bending strength, which contains at least one of needle-like, columnar, rod-like, and scale-like substances. 18. The aggregate shape separating method according to claim 12, wherein the aggregate is coarse aggregate, fine aggregate, blast furnace slag, converter slag, fly ash, limestone, A method for separating the shape of aggregate, which is at least one of silica stone, silica fume, and artificial lightweight aggregate. 19. A specific shape-separated aggregate obtained by separating and recovering by the aggregate shape separation method according to claim 12. 20. At least one type of particles having a specific shape selected from spherical, lump, polygonal and polygonal pyramidal shapes, or more particles having a specific shape of at least one type selected from spherical, lumpy, polygonal and polygonal pyramidal shapes. An aggregate having at least one characteristic of high compressive strength and high fluidity, which is characterized by containing. 21. A hydraulic property having at least one of high compressive strength and high fluidity, which is obtained by curing a mixture of the aggregate, the hydraulic composition and water according to claim 20. A cured product of a composition or a cured product of a hydraulic composition. 22. Particles of at least one specific shape selected from columnar, rod-shaped, needle-shaped, plate-shaped, and scale-shaped, or particles having at least one specific shape selected from columnar, rod-shaped, needle-shaped, plate-shaped, and scale-shaped An aggregate having at least one of high tensile strength and high bending strength, which is characterized by containing a greater amount of. 23. A hydraulic property having at least one of high tensile strength and high bending strength, which is obtained by curing a mixture of the aggregate, the hydraulic composition, and water according to claim 22. A cured product of a composition or a cured product of a hydraulic composition.