JP7281028B1 - Kneading device and kneading method - Google Patents

Abstract

Control the formation of lumps and knead the ingredients evenly. A vibrating screen 24 for passing cement, fly ash, and quicklime by vibrating, a water tank 26 in which a part of the mixing water is stored, and the mixing water excluding the mixing water stored in the water tank 26. In a mixing apparatus 10 comprising a hot water tank 28 which is stored and has an agitator 2802, the cement, fly ash, quicklime that have passed through the vibrating screen 24 and the first mixing water, which is part of the mixing water, are mixed into a mixer. A first kneading step in which sand is supplied to the mixer 12 and kneaded and mixed, and a second kneading step in which sand is supplied to the mixer 12 and kneaded with hot water stored in the hot water tank 28 and in which sodium sulfate is dissolved by stirring with the stirrer 2802 . and a third kneading step of supplying the second kneading water, which is the remaining kneading water excluding the first kneading water, to the mixer 12 and kneading.

Description

The present invention relates to a kneading device and a kneading method.

Conventionally, when mixing mortar and concrete, materials such as coarse aggregate such as gravel, fine aggregate such as sand, and powder such as cement are sequentially supplied to the mixer from coarse-grained materials to finer-grained materials. These granules (solids such as coarse aggregates, fine aggregates, and powders) are kneaded (referred to as empty kneading), and then kneading water is added and further kneaded.
Mixing for the production of such mortars and concretes is carried out using, for example, pan-type, twin-screw forced, single-screw, or multi-blade mixers. When the kneaded material is then compressed and molded into a block, a pan-type mixer with multiple blades (stirring blades for kneading) in the center of a flat cylindrical container is used. It is often done.

In order to improve construction performance and strength compared to mortar or concrete that is produced by kneading in the usual procedure as described above, the kneading water supplied during kneading is divided into primary water and secondary water. A kneading method is disclosed in Patent Document 1, for example.
In the kneading method disclosed in Patent Document 1, primary water and powder of a hydraulic substance such as cement are added to the aggregate, and primary kneading is performed. In addition, secondary kneading is performed to produce concrete.

JP 2015-174433 A

By the way, in the so-called general mortar and concrete manufacturing processes, a large amount of water is supplied for mixing, and the materials are mixed so that they have fluidity. It is a state in which the aggregates and aggregates are moderately dispersed by kneading. Therefore, even in the method of supplying and kneading materials according to the above-described normal procedure or the procedure disclosed in Patent Document 1, powder lumps (like lumps of powder) are less likely to occur. Materials can be mixed evenly.
However, mortar and concrete, which are manufactured as blocks by compressing and molding materials in a formwork, contain a large amount of powder compared to ordinary mortar and concrete. Since the amount of is small, after kneading, it is in a dry state with almost no fluidity.
Therefore, in the case of kneading mortar or concrete with a large amount of powder and a relatively small amount of water for kneading with respect to the powder, the conventional kneading method results in partial formation of lumps. There was a problem that the materials were not uniformly mixed.
In view of the above circumstances, it is a technical object of the present invention to provide a kneading device and a kneading method that are advantageous in suppressing the formation of lumps and uniformly kneading materials.

As a solution to the technical problems described above, the following embodiments of the invention are proposed, although the present invention is not limited. A kneading device for producing mortar or concrete by supplying a first powder containing cement and an admixture, a second powder constituting an additive, an aggregate, and kneading water to a mixer and kneading them. One of the embodiments of the present invention includes a vibrating screen for passing the first powder by vibrating, a first tank in which a part of the kneading water is stored, and a A second tank storing the kneading water excluding the kneading water and having a stirrer for agitating the kneading water; a first powder supply unit that supplies the first powder obtained by the above method to the mixer; a first water supply unit that supplies the kneading water stored in the first tank to the mixer; a second powder supply unit that supplies powder to the second tank; and the kneading water that is stored in the second tank and in which the second powder is dissolved by agitation of the stirrer is supplied to the mixer. It is characterized by comprising a second water supply section and an aggregate supply section for supplying the aggregate to the mixer.
In one embodiment of the present invention, the kneading water stored in the second tank is warm water heated to a predetermined temperature, and the second water supply unit is stored in the second tank. The hot water in which the second powder is dissolved by the stirring of the stirrer is supplied to the mixer.
Further, in one embodiment of the present invention, the first water supply unit supplies the first kneading water, which is a part of the kneading water stored in the first tank, to the mixer, and then the The second kneading water stored in the first tank, which is the remaining kneading water after removing the first kneading water, is supplied to the mixer.
Further, in one embodiment of the present invention, the aggregate supply unit supplies the first aggregate, which is a part of the aggregate, to the mixer, and then the remaining aggregate excluding the first aggregate. The second aggregate, which is a material, is supplied to the mixer, and the first water supply unit supplies the first kneading water, which is a part of the kneading water stored in the first tank, to the mixer. After that, second kneading water, which is the remaining kneading water stored in the first tank after removing the first kneading water, is supplied to the mixer.
In one embodiment of the present invention, the kneading water stored in the first tank and the kneading water stored in the second tank in which the second powder is dissolved are jetted out. It is characterized by further comprising an ejection device for supplying to the mixer.
Further, in one embodiment of the present invention, the first powder is of a plurality of types, and a plurality of containers for respectively storing the plurality of types of the first powder, the second powder, and the aggregate are further provided. It is characterized by having
Further, one embodiment of the present invention controls a pressure vessel in which liquid carbon dioxide is stored, a pressure adjustment device for adjusting the pressure of the carbon dioxide discharged from the pressure vessel, and the pressure adjustment device. and a carbon dioxide supply section for supplying the carbon dioxide discharged from the pressure vessel and pressure-adjusted to the mixer.
In one embodiment of the present invention, a first powder containing cement and an admixture, a second powder constituting an additive, an aggregate, and kneading water are supplied to a mixer and kneaded. a mixing method carried out in a mixing device for producing mortar or concrete in a mixing device comprising: a vibrating screen through which said first powder is vibrated; and a portion of said mixing water and a second tank that stores the kneading water excluding the kneading water stored in the first tank and has a stirrer that agitates the kneading water. a first kneading step of supplying and kneading the first powder that has passed through the vibrating screen and the first kneading water that is part of the kneading water stored in the first tank; , a second kneading step of supplying and kneading the kneading water, in which the second powder is dissolved by stirring the second powder stored in the second tank and the aggregate, and the first tank; and a third kneading step of supplying second kneading water, which is the remaining kneading water after removing the first kneading water, and kneading.
In one embodiment of the present invention, a first powder containing cement and an admixture, a second powder constituting an additive, an aggregate, and kneading water are supplied to a mixer and kneaded. a mixing method carried out in a mixing device for producing mortar or concrete in a mixing device comprising: a vibrating screen through which said first powder is vibrated; and a portion of said mixing water and a second tank that stores the kneading water excluding the kneading water stored in the first tank and has a stirrer that agitates the kneading water. , an empty kneading step of supplying and kneading the first aggregate that is a part of the aggregate, the first powder passed through the vibrating screen, and the kneading water stored in the first tank A first kneading step of supplying and kneading a first kneading water, which is a part, and the kneading water stored in the second tank and in which the second powder is dissolved by stirring of the stirrer , a second kneading step of supplying and kneading the second aggregate, which is the remaining aggregate excluding the first aggregate, and removing the first kneading water stored in the first tank and a third kneading step of supplying second kneading water, which is the remaining kneading water, and kneading.
Further, in one embodiment of the present invention, the kneading water stored in the second tank is hot water warmed to a predetermined temperature, and in the second kneading step, the water is stored in the second tank. The hot water in which the second powder is dissolved is supplied by the stirring of the stirrer.
In one embodiment of the present invention, the kneading device further includes a pressure vessel in which liquid carbon dioxide is stored, and after the cement is supplied, the carbon dioxide discharged from the pressure vessel is It is characterized by further comprising a carbon dioxide kneading step of supplying and kneading.
Moreover, one embodiment of the present invention is characterized in that the kneading method described above is repeated a predetermined number of times.

A kneading device according to an embodiment of the present invention includes a vibrating screen for passing a first powder by vibrating it, a first tank in which a part of the kneading water is stored, and a kneading agent stored in the first tank. a second tank that stores kneading water excluding the mixing water and has a stirrer that agitates the kneading water; Since the kneading water in which is dissolved is supplied to the mixer and kneaded, even when mixing mortar or concrete with a large amount of powder and a small amount of kneading water for the powder, it suppresses the formation of lumps, This is advantageous for uniformly mixing the materials. Therefore, when a block is manufactured from kneaded mortar or concrete, it is possible to manufacture a uniform block with few lumps, which increases the compressive strength and suppresses the variation in the compressive strength, which is advantageous for improving the quality stability of the block. becomes.
Further, if the water for kneading stored in the second tank is warmed to a predetermined temperature, and the warm water stored in the second tank and in which the second powder is dissolved by stirring with the stirrer is supplied to the mixer. , the second powder is easily dissolved and easily mixed with other materials in the mixer, which is advantageous for further suppressing the formation of lumps and uniformly kneading the materials.
In addition, the first kneading water, which is part of the kneading water stored in the first tank, is supplied to the mixer, and then the remaining kneading water stored in the first tank excluding the first kneading water is used. If a certain second kneading water is supplied to the mixer, the kneading water is divided and supplied to further suppress the formation of lumps, which is advantageous in uniformly kneading the materials.
Also, the first aggregate, which is a part of the aggregate, is supplied to the mixer, and then the second aggregate, which is the remaining aggregate excluding the first aggregate, is supplied to the mixer, and the first aggregate is supplied to the first tank. The first kneading water, which is part of the stored kneading water, is supplied to the mixer, and then the second kneading water, which is the remaining kneading water stored in the first tank excluding the first kneading water. is supplied to the mixer, by dividing and supplying the aggregate and kneading water, the formation of lumps is further suppressed, which is advantageous in uniformly kneading the materials.
In addition, if the configuration further includes a jetting device for supplying the mixer by jetting the kneading water stored in the first tank and the kneading water stored in the second tank in which the second powder is dissolved. , The kneading water stored in the first tank and the kneading water stored in the second tank in which the second powder is dissolved are uniformly supplied while being scattered over the entire material in the mixer, so that lumps are removed. It is advantageous for further suppressing what can be done and for uniformly kneading the materials.
In addition, there are a plurality of types of the first powder, and if the configuration further includes a plurality of containers for respectively storing a plurality of types of the first powder, the second powder, and the aggregate, each material can be easily weighed. It is advantageous in easily supplying each material in the set supply amount.
In addition, if the configuration further includes a carbon dioxide supply unit that supplies carbon dioxide, the pressure of which is adjusted by controlling the pressure adjustment device and is discharged from the pressure vessel, to the mixer, the carbon dioxide and the cement or admixture undergo a carbonation reaction. As a result, it hardens and hardens into a congealed state, which is advantageous in increasing the initial strength of mortar and concrete.
In addition, a vibrating screen for passing the first powder by vibrating, a first tank in which a part of the kneading water is stored, and a kneading water excluding the kneading water stored in the first tank is stored. In a kneading device provided with a second tank having a stirrer for agitating kneading water, the first powder that has passed through the vibrating screen and the first powder that is part of the kneading water stored in the first tank 1 A first kneading step in which kneading water is supplied and kneaded, and kneading water stored in a second tank and in which the second powder is dissolved by stirring with a stirrer, and aggregate are supplied and kneaded. Kneading including a second kneading step and a third kneading step of supplying second kneading water, which is the remaining kneading water stored in the first tank and excluding the first kneading water, and kneading. By carrying out the method, even when mixing mortar or concrete with a large amount of powder and a small amount of water for mixing with respect to the powder, it is advantageous to suppress the formation of lumps and uniformly mix the materials. becomes. Therefore, when a block is manufactured from kneaded mortar or concrete, it is possible to manufacture a uniform block with few clumps, which increases the compressive strength and suppresses the variation in the compressive strength, which is advantageous for improving the quality stability of the block. becomes.
In addition, a vibrating screen for passing the first powder by vibrating, a first tank in which a part of the kneading water is stored, and a kneading water excluding the kneading water stored in the first tank is stored. In a kneading device equipped with a second tank having a stirrer for stirring kneading water, an empty kneading step of supplying and kneading the first aggregate, which is a part of the aggregate, and a vibrating screen. A first kneading step of supplying and kneading the first powder and the first kneading water that is part of the kneading water stored in the first tank, and stirring with a stirrer stored in the second tank A second kneading step of supplying and kneading the kneading water in which the second powder is dissolved and the second aggregate, which is the remaining aggregate excluding the first aggregate, and stored in the first tank By executing the kneading method including the third kneading step of supplying the second kneading water, which is the remaining kneading water excluding the first kneading water, and kneading, the amount of powder is large, Even in the case of kneading mortar or concrete with a small amount of kneading water for the powder, the formation of lumps is suppressed, which is advantageous in uniformly kneading the materials. Therefore, when a block is manufactured from kneaded mortar or concrete, it is possible to manufacture a uniform block with few clumps, which increases the compressive strength and suppresses the variation in the compressive strength, which is advantageous for improving the quality stability of the block. becomes.
In addition, the kneading water stored in the second tank is used as hot water heated to a predetermined temperature, and in the second kneading step, the hot water stored in the second tank and in which the second powder is dissolved by stirring with the stirrer is supplied. With this configuration, the second powder is easily dissolved and easily mixed with other materials in the mixer, which is advantageous for further suppressing the formation of lumps and uniformly kneading the materials.
After the cement is supplied, if the configuration further includes a carbon dioxide kneading step of supplying carbon dioxide discharged from the pressure vessel and kneading, the carbon dioxide, cement, and the admixture undergo a carbonation reaction to harden and tighten. It becomes a set state, which is advantageous in increasing the initial strength of mortar and concrete.
Further, by repeating the kneading method described above for a predetermined number of times, the formation of lumps can be further suppressed, which is advantageous in uniformly kneading the materials.

FIG. 2 is a diagram showing the mixing ratio of materials when producing mortar or concrete; It is a figure which shows the structure of the kneading apparatus concerning 1st Embodiment. 1 is a block diagram showing the configuration of a control device according to a first embodiment; FIG. 4 is a flow chart showing the flow of the kneading method according to the first embodiment. 6 is a flow chart showing the flow of the kneading method according to the second embodiment. It is a figure which shows the structure of the kneading apparatus concerning 3rd Embodiment. FIG. 11 is a block diagram showing the configuration of a control device according to a third embodiment; FIG. It is a figure which shows the test result of the compressive strength of the block manufactured by the kneading method of 1st Embodiment, and the conventional kneading method.

(First embodiment)
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 2, the kneading device 10 of the first embodiment comprises a first powder containing cement and an admixture, a second powder constituting an additive, an aggregate, and water for kneading. Mortar or concrete is manufactured by performing a kneading process in which materials are supplied to the mixer 12 and kneaded.
In the following embodiments, mortar is produced by kneading a first powder containing cement and an admixture, a second powder constituting an additive, fine aggregates, and kneading water.
As shown in FIG. 1, the mixing ratio of the mortar materials used in the kneading device of the present embodiment is 10 to 15% by weight of kneading water, 56 to 76% by weight of powder, and sand as fine aggregate. is 15 to 30% by weight.
Also, the powder is blended with 10-15% by weight of cement, 40-50% by weight of fly ash, 5-10% by weight of quicklime, and 1% by weight of sodium sulfate.
That is, the mortar kneaded by the kneading device of the present embodiment is mixed with powder at a ratio of 56 to 76% by weight of the total weight of powder, fine aggregate, and kneading water. is. The weight percentages of the mixing water, the powder, and the fine aggregate are selected from the numerical range of the blending ratio of each material so that the total weight of the mortar is 100% by weight.

On the other hand, the mixing ratio of the conventional mortar materials is 10% by weight of mixing water, 20% by weight of cement as powder, and 70% by weight of sand as fine aggregate.
The mixing ratio of conventional concrete materials is 10% by weight of mixing water, 15% by weight of cement as powder, 35% by weight of sand as fine aggregate, and 40% by weight of gravel as coarse aggregate. %.
That is, conventional mortars and concretes are mixed with powder at a ratio of 15% or 20% by weight of the total weight of powder, aggregate and mixing water.

That is, the mortar used in the first embodiment has a higher proportion of powder than conventional mortar or concrete. In addition, since the mortar used in the first embodiment has a larger amount of powder than conventional mortar or concrete, the amount of water to be mixed with the powder is relatively small.
The mortar kneaded by the kneading device 10 of the present embodiment is manufactured as a block by, for example, being placed in a mold and compression-molded.
In the following embodiments, among powders, cement, fly ash, and quicklime are used as the first powder, and sodium sulfate is used as the second powder.

Next, the kneading device 10 will be described.
As shown in FIG. 2, the kneading device 10 includes a mixer 12, a cement silo 14, a fly ash silo 16, a quicklime silo 18, a fine aggregate silo 20, a sodium sulfate silo 22, and a vibrating screen 24. , a water tank 26 , a hot water tank 28 , a shower 30 and a control device 100 .
The kneading process performed by the kneading device 10 of the present embodiment includes a first kneading step in which the first powder and a part of the kneading water are supplied and kneaded, and hot water in which the second powder is dissolved. A three-stage process of a second kneading step in which fine aggregate is supplied and kneaded, and a third kneading step in which the remaining kneading water is supplied and kneaded is performed.

The mixer 12 is a pan-type mixer, and includes a cylindrical housing portion 1202 opened upward, a rotatable shaft 1204 extending vertically at the center of the housing portion 1202, and a It is configured with four blades (stirring blades) 1206 . Although four blades 1206 are provided in this embodiment, the number of blades is arbitrary.
The mixer 12 agitates the material supplied to the container 1202 by rotating the four blades 1206 about the shaft 1204 as the shaft 1204 rotates.
In this embodiment, a material for manufacturing mortar is supplied to the inside of the container 1202 of the mixer 12, and the shaft 1204 is rotated by a control unit (not shown) at a predetermined timing. Rotation of the blades 1206 to mix the supplied material.
In this embodiment, an example using a pan-type mixer is shown, but the present invention is not limited to this, and any mixer such as a twin-screw compulsory type or a single-screw type mixer can be applied.

The cement silo 14 is a container for storing cement (first powder), and includes a cylindrical main body 1402 and a conical hopper connected to the lower part of the main body 1402 and having a cross section that decreases downward. A discharge port 1406 for discharging cement is provided at the lower end of the hopper portion 1404 .
Cement stored in the cement silo 14 is charged from above the body portion 1402 and discharged from the discharge port 1406 at the lower end of the hopper portion 1404 . The hopper section 1404 is also provided with a weighing mechanism for weighing the amount of discharged cement.
The discharged cement is put into the vibrating screen 24 and supplied to the mixer 12 after passing through the vibrating screen 24 .
Examples of cement include ordinary Portland cement, high-early-strength cement, blast-furnace cement, and low-heat cement. When supplying a plurality of types of cement, a plurality of silos are provided for each type of cement, and each type of cement is supplied to the mixer 12 through the vibrating screen 24 . Moreover, the mixing ratio when supplying a plurality of types of cement can be arbitrarily set.

The fly ash silo 16 is a container for storing fly ash (first powder), and is composed of a cylindrical main body 1602 and a conical hopper 1604 like the cement silo 14 . Fly ash is charged from above the body portion 1602 and discharged from the discharge port 1606 at the lower end of the hopper portion 1604 . The hopper section 1604 is also provided with a weighing mechanism (not shown) for weighing the amount of fly ash discharged.
The discharged fly ash is put into the vibrating screen 24 and supplied to the mixer 12 after passing through the vibrating screen 24 .

The quicklime silo 18 is a container that stores quicklime (first powder). Like the cement silo 14 , the quicklime silo 18 is composed of a cylindrical body 1802 and a conical hopper 1804 . Quicklime is charged from above the body portion 1802 and discharged from the discharge port 1806 at the lower end of the hopper portion 1804 . In addition, the hopper section 1804 is provided with a weighing mechanism for weighing the discharge amount of quicklime.
The discharged quicklime is put into the vibrating screen 24 and supplied to the mixer 12 after passing through the vibrating screen 24 .

Fly ash and quicklime are admixtures that increase the strength of mortar and concrete and reduce the heat of hydration. The above admixture is an example, and the present invention is not limited to this, and other materials may be used. The admixture includes, for example, ground blast furnace slag, silica fume, expansive material, waterproofing material, crushed stone powder (limestone fine powder), pulverized incineration ash and slag.
When supplying a plurality of types of admixture, a plurality of silos are provided for each type of admixture, and each of the various admixtures is supplied to the mixer 12 via the vibrating screen 24 . Moreover, the mixing ratio when supplying a plurality of kinds of admixtures can be set arbitrarily.

The fine aggregate silo 20 is a container for storing fine aggregate, and sand as the fine aggregate is stored in the present embodiment. Fine aggregates include, for example, hard sandstone crushed sand, silica sand, incineration bottom ash, and the like.
The fine aggregate silo 20, like the cement silo 14, is composed of a cylindrical main body 2002 and a conical hopper 2004. is discharged from the discharge port 2006 at the lower end of the . In addition, the hopper section 2004 is provided with a weighing mechanism for weighing the amount of discharged sand.
The discharged sand is supplied to mixer 12 .

Note that the fine aggregate described above is an example, and the present invention is not limited to this, and other materials may be used. Further, for example, as the fine aggregate, incinerated ash may be entirely replaced, partially replaced, or optionally combined. Also, a plurality of types of fine aggregates may be blended and used.
When supplying a plurality of types of fine aggregate, a plurality of silos are provided for each type of fine aggregate, and each type of fine aggregate is supplied to the mixer 12 . Moreover, the blending ratio when supplying a plurality of types of fine aggregates can be set arbitrarily.
For example, when fine aggregate for concrete such as crushed sand and mountain sand, and fine aggregate such as incineration ash and slag are stored in three fine aggregate silos (silo 1, silo 2, and silo 3), Silo 1, silo 2, and silo 3 can be supplied in the following ratios.
(1) Silo 1: Silo 2: Silo 3 = 20 wt%: 30 wt%: 50 wt%
(2) Silo 1: Silo 2 = 50% by weight: 50% by weight
(3) Silo 1: Silo 2 = 25% by weight: 75% by weight
(4) Silo 2: Silo 3 = 20% by weight: 80% by weight
Such a mixing ratio is arbitrary, and is determined based on the performance after kneading the mortar (fresh performance), mechanical performance, durability performance, or effective utilization of waste required for the block to be manufactured. be.

The sodium sulfate silo 22 is a container that stores sodium sulfate (second powder). The sodium sulfate silo 22 , like the cement silo 14 , is composed of a columnar body portion 2202 and a conical hopper portion 2204 . Sodium sulfate is charged from above the body portion 2202 and discharged from the discharge port 2206 at the lower end of the hopper portion 2204 . In addition, the hopper section 2204 is provided with a weighing mechanism for weighing the discharge amount of sodium sulfate.
The discharged sodium sulfate is supplied to the hot water tank 28 .

Sodium sulfate is an additive that accelerates the hardening of the cement-water mixture. The above additives are only examples, and the present invention is not limited to these, and other materials may be used. Examples of additives include chlorides, nitrates, sulfates, carbonates, and silicates of sodium, calcium, and magnesium, such as calcium chloride, sodium nitrate, calcium nitrate, calcium sulfate, magnesium sulfate, sodium carbonate, Examples include calcium carbonate, sodium silicate, magnesium silicate, and calcium silicate.
When supplying a plurality of types of additives, a plurality of silos are provided for each type of additive, and the various additives are supplied to the hot water tank 28 or the mixer 12, respectively. Moreover, the mixing ratio when supplying a plurality of types of additives can be set arbitrarily.

Further, in addition to the above-described admixtures and additives, another admixture may be added.
Examples of other admixtures include liquid air volume regulators (antifoaming agents or foaming agents), water reducing agents, high-performance AE water reducing agents, and AE water reducing agents. The water reducing agent, the high-performance AE water reducing agent, and the AE water reducing agent are mainly composed of polycarboxylic acid, naphthalene, or the like. The amount of water-reducing admixture is preferably in the range of 0.1 to 0.5% by weight, 0.5 to 2% by weight, and 2 to 5% by weight of the unit cement amount.
Such an admixture is stored in an admixture tank 25 provided near the water tank 26, as shown in FIG. After being mixed, it is supplied to the mixer 12 and kneaded with other ingredients.

The vibrating sieve 24 is, for example, a sieve with a mesh size of 1 to 5 mm. Separate the body.
The vibrating screen 24 of the present embodiment is arranged in the vicinity of the upper part of the mixer 12, and vibrates to pass the first powder just before it is supplied to the mixer 12, and the passed first powder passes through the mixer. supplied.
By supplying the first powder through the vibrating sieve in this manner, lumped cement, fly ash, and quicklime can be loosened and powdered. In addition, cement, fly ash, and quicklime, which are solidified and hardened in lumps, and quicklime can be excluded, which is advantageous in suppressing the formation of lumps when mixing the materials and uniformly mixing the materials.

The water tank 26 (first tank) is a tank that stores kneading water. Specifically, a part of the kneading water (the amount of kneading water obtained by subtracting the hot water stored in the hot water tank 28 from the entire kneading water to be supplied) is stored.
A drain port for draining the kneading water is provided at the bottom of the water tank 26, and a measuring mechanism (not shown) for measuring the amount of the kneading water drained is provided.

The hot water tank 28 (second tank) is a tank that stores hot water obtained by warming the kneading water. Specifically, warm water obtained by warming part of the kneading water (the kneading water obtained by subtracting the amount of kneading water stored in the water tank 26 from the total amount of kneading water to be supplied) is stored. there is
In this embodiment, the hot water tank 28 stores hot water obtained by heating the kneading water to about 40° C. in an amount of 30 to 50% by weight of the entire kneading water. Therefore, in the water tank 26, 50 to 70% by weight of the whole kneading water is stored as kneading water excluding hot water.
A stirrer 2802 for stirring hot water is provided inside the hot water tank 28 .
The stirrer 2802 is configured, for example, with a rotatable shaft (not shown) and a plurality of stirring blades attached to the shaft, and the rotation of the shaft rotates the stirring blades to stir hot water. do.
In the hot water tank 28 of the present embodiment, when sodium sulfate as the second powder is supplied from the sodium sulfate silo 22, the hot water containing sodium sulfate is stirred by the stirrer 2802, thereby dissolving the sodium sulfate in the hot water. do.
In the hot water tank 28 of the present embodiment, 30 to 50% by weight of the whole kneading water is warmed to about 40° C. and warm water is stored. and the temperature of hot water can be set arbitrarily. Therefore, the amount of hot water stored in the hot water tank 28 may be, for example, 25% by weight or 55% by weight of the entire mixing water, and the temperature of the hot water may be higher than the mixing water. It may be 35°C or 45°C.
The sodium sulfate may also be dissolved in unwarmed kneading water prior to feeding to mixer 12 . On the other hand, as in the present embodiment, by dissolving in warm water and then supplying it to the mixer 12, sodium sulfate is easily dissolved and mixed with other materials in the mixer 12, and when the materials are kneaded, it is easy to mix. It is advantageous in suppressing the formation of lumps and uniformly kneading the ingredients.
A drain port for discharging hot water is provided at the lower portion of the hot water tank 28, and a measuring mechanism for measuring the amount of hot water to be discharged is provided.

The shower 30 is an ejection device that supplies the mixer 12 by ejecting kneading water stored in the water tank 26 and hot water in which sodium sulfate (second powder) is dissolved and stored in the hot water tank 28 . be.
The shower 30 is composed of, for example, a pipe (not shown) and a spout having a plurality of holes. One of the pipes is connected to the water tank 26 or the hot water tank 28, and the other is connected to the spout.
Moreover, the ejection port is arranged near the upper part of the mixer 12 so that the kneading water and hot water are not ejected to the outside of the mixer 12 .
By jetting the kneading water and hot water from the shower 30 in this way, the kneading water and hot water can be uniformly supplied while being scattered over the entire material in the mixer 12, and the material can be kneaded. It is advantageous in suppressing the formation of lumps and uniformly kneading the ingredients.

The control device 100 includes a control device such as a CPU (Central Processing Unit), a storage device such as a ROM (Read Only Memory) that stores a control program and a RAM (Random Access Memory) as an operating area for the control program, an output device, an input It has a hardware configuration using a normal computer including a device and a communication I/F (interface) for communicating with an external device. As shown in FIG. 3, the control device 100 controls the supply amount setting unit 102, the sodium sulfate supply unit 104 as the second powder supply unit, and the agitator control by executing the control program stored in the ROM by the CPU. section 106, vibrating screen control section 108, first powder supply section 110 (cement supply section 112, fly ash supply section 114, quicklime supply section 116), mixing water supply section 118, hot water supply section 120, and aggregate supply. It functions as part 122 .

The supply amount setting unit 102 controls cement (first powder), fly ash (first powder), quicklime (first powder), sodium sulfate (second powder), sand (fine aggregate), which will be described later. The supply amounts of the first kneading water, the second kneading water described later, and hot water are set.
The total supply amount of the first kneading water, the second kneading water, and the hot water is the total amount of kneading water to be supplied according to the material (first kneading water + second kneading water Mixing water + hot water = total mixing water to be supplied).

Further, the kneading process performed by the kneading device 10 may be configured to be performed once, or may be configured to be performed repeatedly a plurality of times.
That is, as described above, the kneading process performed by the kneading device 10 of the present embodiment includes three stages of the first kneading process, the second kneading process, and the third kneading process. , When the kneading treatment is performed once, each step is performed once.
Further, when the kneading process is repeated a plurality of times, the first kneading process, the second kneading process, and the third kneading process are set as one set, and this is repeated. For example, when the kneading process is repeated twice, after performing the first kneading step, the second kneading step, and the third kneading step, the first kneading step, the second kneading step, Repeat the third kneading step.
When the kneading process is performed repeatedly in this way, the supply amount setting unit 102 determines and sets the supply amount of each material according to the number of times the kneading process is performed. At this time, the supply amount setting unit 102 may divide the supply amount into equal amounts for the number of times the kneading process is performed, or may set the supply amount by dividing it into different amounts. How to divide the amount can be set arbitrarily.
That is, for example, when the kneading process is repeated twice, the supply amount setting unit 102 may set the supply amount by dividing each material into 1/2 each. , the supply amount may be set by dividing the second supply amount into 2/3.

The sodium sulfate supply unit 104 (second powder supply unit) measures the supply amount of sodium sulfate set by the supply amount setting unit 102 from the sodium sulfate silo 22 using a measuring mechanism, and supplies the sodium sulfate to the hot water tank 28 .

The agitator control unit 106 performs agitation control of the agitator 2802 provided in the hot water tank 28, and when hot water is stored in the hot water tank 28 and sodium sulfate is supplied, the shaft of the agitator 2802 is rotated. Agitate the warm water with a squeegee to dissolve the sodium sulfate in the warm water.
The process of supplying sodium sulfate to the hot water tank and stirring the warm water to dissolve the sodium sulfate is performed before the kneading process.

The vibrating screen control unit 108 vibrates the vibrating screen 24, and when the cement, fly ash, and quicklime that are the first powder are added, vibrates the vibrating screen 24 to pass the first powder, Let the mixer 12 feed.

The first powder supply unit 110 puts the first powder into the vibrating screen 24 in the first kneading step, and supplies the first powder that has passed through the vibrating screen 24 to the mixer 12, A cement supply section 112, a fly ash supply section 114, and a quicklime supply section 116 are provided for each material.

The cement supply unit 112 measures the amount of cement to be supplied from the cement silo 14 set by the supply amount setting unit 102 by means of a weighing mechanism, feeds the cement into the vibrating screen 24 and passes it through, and then supplies it to the mixer 12 .
The fly ash supply unit 114 measures the amount of fly ash supplied from the fly ash silo 16 set by the supply amount setting unit 102 using a weighing mechanism, puts the fly ash into the vibrating screen 24 and passes it through the mixer 12 . supply.
The quicklime supply unit 116 measures quicklime in the amount set by the supply amount setting unit 102 from the quicklime silo 18 by a weighing mechanism, puts it into the vibrating screen 24 and passes it through, and then supplies it to the mixer 12.

The kneading water supply unit 118 (first water supply unit) supplies the kneading water stored in the water tank 26 to the mixer 12 . At this time, the kneading water supply unit 118 measures the amount of kneading water set by the supply amount setting unit 102 using the measuring mechanism, and supplies the kneading water to the mixer 12 from the nozzle of the shower 30 .
Further, in the present embodiment, the kneading water supply unit 118 supplies the first kneading water, which is part of the kneading water, to the mixer 12 in the first kneading step, and then the third kneading step , the second kneading water, which is the remaining kneading water after removing the first kneading water, is supplied to the mixer 12 .

The hot water supply unit 120 (second water supply unit) supplies hot water (solution) stored in the hot water tank 28 and in which sodium sulfate is dissolved by stirring with the stirrer 2802 to the mixer 12 in the second kneading step. At this time, the hot water supply unit 120 measures the amount of hot water to be supplied set by the supply amount setting unit 102 by means of the measuring mechanism, and supplies the hot water to the mixer 12 from the nozzle of the shower 30 .

In the second kneading step, the aggregate supply unit 122 measures the amount of sand to be supplied set by the supply amount setting unit 102 from the fine aggregate silo 20 using a weighing mechanism, and supplies the sand to the mixer 12 .

Next, the flow of the kneading process performed when manufacturing mortar in the kneading apparatus 10 of this embodiment will be described with reference to FIG.
FIG. 4 illustrates a case where the kneading process is repeated multiple times. That is, as described above, the first kneading step, the second kneading step, and the third kneading step are set as one set, and this is set to be repeated multiple times. In addition, the method of dividing the supply amount of the materials is set so as to be divided into equal amounts for the number of times the kneading process is performed.

First, the supply amount setting unit 102 sets the supply amount of each material according to the preset number of kneading processes and how to divide the material supply amount (step S10). Then, the sodium sulfate supply unit 104 supplies the set supply amount of sodium sulfate to the hot water tank 28 (step S12). When the sodium sulfate is supplied, the agitator control unit 106 rotates the shaft of the agitator 2802 to agitate the warm water and dissolve the sodium sulfate in the warm water (step S14).

Next, when the vibrating screen control unit 108 vibrates the vibrating screen 24 (step S16), the cement supply unit 112 supplies the set supply amount of cement, and the fly ash supply unit 114 supplies the set supply amount of fly. The quicklime supply unit 116 supplies the set supply amount of quicklime to the vibrating screen 24 and passes the ash, and then supplies the ash to the mixer 12. The kneading water supply unit 118 supplies the set supply amount. of the first kneading water is supplied to the mixer 12 (step S18).
Then, the blade 1206 of the mixer 12 is rotated to knead the cement, fly ash, quicklime, and first kneading water (step S20).
The step of supplying the cement, fly ash, and quicklime through the vibrating screen 24, supplying the first kneading water, and kneading (steps S16, 18, and 20) is referred to as a first kneading step.

Next, the hot water supply unit 120 supplies a set supply amount of hot water in which sodium sulfate is dissolved to the mixer 12, and the aggregate supply unit 122 supplies a set supply amount of sand to the mixer 12 (step S22).
Then, the blades 1206 of the mixer 12 are rotated to knead the supplied hot water and the materials including sand (step S24).
The step of further supplying the hot water and sand and kneading (steps S22, S24) is referred to as a second kneading step.

Next, the kneading water supply unit 118 supplies the set supply amount of the second kneading water to the mixer 12 (step S26).
Then, the blade 1206 of the mixer 12 is rotated to knead the materials including the supplied second kneading water (step S28).
The step of further supplying the second kneading water and kneading (steps S26, S28) is referred to as a third kneading step.

Next, the supply amount setting unit 102 determines whether or not the kneading process has been performed a predetermined number of times (step S30), and if the kneading process has not been performed a predetermined number of times (step S30: NO ), return to step S10 and repeat the process.
On the other hand, if the kneading process has been performed a predetermined number of times (step S: YES), the process ends.

As shown in FIG. 2, when the kneading process shown in FIG. 4 is completed, the mortar produced by kneading in the mixer 12 is discharged from the mixer 12 and conveyed to the molding machine (not shown) by the belt conveyor 40. be. And a block is manufactured by compressing and compressing in a molding machine.

Here, in the kneading process shown in FIG. 4, the second kneading process is started after the first kneading process is completed, and the third kneading process is started after the second kneading process is completed. Although the case where the next step is started after the previous step is completed has been described, the next step may be started while the previous step is continuing, or may be started simultaneously.
Specifically, for example, the second kneading step is started while the first kneading step is continuing, and finally the third kneading step is performed.
Further, for example, even if the first kneading step and the second kneading step are started almost at the same time and these steps are being continued, the third kneading step is continued.
Also, when it takes a long time to supply materials, all processes are started and executed at the same time.
That is, in the kneading process performed by the kneading apparatus 10 of the present embodiment, each step can be started at any timing depending on the situation at the site, the amount of materials, and the like.

As described above, according to the kneading device 10 of the first embodiment, the vibrating sieve 24 that allows the cement, fly ash, and quicklime to pass through by vibrating, and the water tank 26 that stores a part of the kneading water and a hot water tank 28 in which the kneading water excluding the kneading water stored in the water tank 26 is stored, and a hot water tank 28 having a stirrer 2802 for agitating the kneading water. , quicklime, and mixing water in which sodium sulfate is dissolved by stirring with the stirrer 2802 are supplied to the mixer 12 and mixed, so that the amount of powder is large and the amount of mixing water for the powder is small. Even when kneading, it is advantageous in suppressing the formation of lumps and uniformly kneading the materials.
Therefore, when a block is manufactured from kneaded mortar or concrete, it is possible to manufacture a uniform block with few clumps. Become.
Further, since the water for kneading stored in the hot water tank 28 is warmed to a predetermined temperature, and the warm water stored in the hot water tank 28 and in which sodium sulfate is dissolved by stirring with the stirrer 2802 is supplied to the mixer 12 . , the sodium sulfate is easily dissolved and easily mixed with other materials in the mixer 12, which is advantageous for further suppressing the formation of lumps and uniformly kneading the materials.

Further, in the present embodiment, the first kneading water, which is part of the kneading water stored in the water tank 26, is supplied to the mixer 12, and then the first kneading water stored in the water tank 26 is removed. Since the second kneading water, which is the remaining kneading water, is supplied to the mixer 12, the kneading water is dividedly supplied to further suppress the formation of lumps, and the materials are uniformly kneaded. advantage over

Further, since the mixer 12 is provided with the shower 30 for supplying the mixing water stored in the water tank 26 and the hot water stored in the hot water tank 28 in which sodium sulfate is dissolved, the mixing water and the sodium sulfate are discharged. Dissolved hot water is uniformly supplied while scattering it over the entire material in the mixer 12, which is advantageous for further suppressing the formation of lumps and uniformly kneading the material.
In addition, since there are a plurality of types of the first powder, a plurality of silos (cement silo 14, fly ash silo 16, quicklime silo 18, fine aggregate silo 20, the sodium sulfate silo 22) is provided, which is advantageous in easily weighing each material and easily supplying each material in a set supply amount to the mixer 12.

Further, as in the present embodiment, the cement, fly ash, and quicklime that have passed through the vibrating screen 24 and the first kneading water that is part of the kneading water stored in the water tank 26 are supplied and kneaded. a first kneading step of mixing, a second kneading step of supplying kneading water stored in the hot water tank 28 and having sodium sulfate dissolved therein by stirring with the agitator 2802 and sand, and storing in the water tank 26 . By executing a kneading method including a third kneading step of supplying second kneading water, which is kneading water remaining after removing the first kneading water, and kneading, the amount of powder is increased. Even when mixing mortar or concrete with a small amount of water for mixing with respect to the powder, it is advantageous in suppressing the formation of lumps and uniformly mixing the materials.
Therefore, when a block is manufactured from kneaded mortar or concrete, it is possible to manufacture a uniform block with few clumps, which increases the compressive strength and suppresses the variation in the compressive strength, which is advantageous for improving the quality stability of the block. becomes.
The water for kneading stored in the hot water tank 28 is heated to a predetermined temperature, and in the second kneading step, hot water in which sodium sulfate is dissolved and stored in the hot water tank 28 is stirred by the stirrer 2802 to be supplied. With this configuration, sodium sulfate can be easily dissolved and easily mixed with other materials in the mixer 12, which is advantageous for further suppressing the formation of lumps and uniformly kneading the materials.
Further, by repeating the kneading method of the present embodiment for a predetermined number of times, the formation of lumps is further suppressed, which is advantageous in uniformly kneading the materials.

(Second embodiment)
In the first embodiment, the kneading water is supplied separately into the first kneading water and the second kneading water, whereas in the second embodiment, not only the kneading water, Another difference is that sand as fine aggregate is divided into first sand and second sand.
In the following description of the embodiment, the same reference numerals are assigned to the same parts and members as in the first embodiment, and the description thereof will be omitted, and the parts different from the first embodiment will be emphasized. to explain.
Further, the mixing ratio of materials in the kneading process of the present embodiment is the same as that of the first embodiment.
Since the configuration of the kneading device 10 is the same as that of the first embodiment, it will be described with reference to FIG.
In addition, the kneading process performed by the kneading device 10 of the present embodiment includes an empty kneading step in which a part of the fine aggregate is supplied and kneaded, and a part of the first powder and kneading water are supplied. A first kneading step in which the second powder is dissolved and the remaining fine aggregate is supplied and kneaded, and a third kneading step in which the remaining kneading water is supplied and kneaded. A four-stage process of kneading is performed.

The supply amount setting unit 102 of the present embodiment provides cement (first powder), fly ash (first powder), quicklime (first powder), sodium sulfate (second powder), first sand ( 1st aggregate), 2nd sand (2nd aggregate), 1st kneading water, 2nd kneading water, and hot water supply amounts are set.
In the present embodiment, for example, the supply amount setting unit 102 sets the supply amount of the first sand to 1/3 to 1/2 of the total amount of sand to be supplied, and the supply amount of the second sand to the remaining sand, that is, Set to 1/2 to 2/3.
When the kneading process is repeated a plurality of times, the amount of supply may be divided equally or not in the same manner as in the first embodiment.

The aggregate supply unit 122 of the present embodiment measures the amount of sand to be supplied set by the supply amount setting unit 102 from the fine aggregate silo 20 using a weighing mechanism, and supplies the sand to the mixer 12 .
Further, in the present embodiment, the aggregate supply unit 122 supplies first sand (first aggregate), which is a part of sand, to the mixer 12 in the dry kneading step, and then in the third kneading step. , second sand (second aggregate), which is the remaining sand after removing the first sand, is supplied to the mixer 12 .

Next, the flow of the kneading process performed when producing mortar in the kneading apparatus 10 of the present embodiment will be described with reference to FIG.
In FIG. 5, as in FIG. 4, the case where the kneading process is repeated multiple times will be described. That is, the empty kneading process, the first kneading process, the second kneading process, and the third kneading process are set as one set, and this is set to be repeated multiple times. In addition, the method of dividing the supply amount of the materials is set so as to be divided into equal amounts for the number of times the kneading process is performed.

First, the supply amount setting unit 102 sets the supply amount of each material according to the preset number of kneading processes and how to divide the supply amount of the material, and the process until sodium sulfate is dissolved in hot water ( Steps S40 to S44) are the same as in the first embodiment (steps S12 to S14).

Next, the aggregate supply unit 122 supplies the set supply amount of the first sand to the mixer 12 (step S46).
Then, the blade 1206 of the mixer 12 is rotated to knead the first sand (step S48).
The step of supplying and kneading the first sand (steps S46 and S48) is called an empty kneading step.

Next, when the vibrating screen control unit 108 vibrates the vibrating screen 24 (step S50), the cement supply unit 112 supplies the set supply amount of cement, and the fly ash supply unit 114 supplies the set supply amount of fly. The quicklime supply unit 116 supplies the set supply amount of quicklime to the vibrating screen 24 and passes the ash, and then supplies the ash to the mixer 12. The kneading water supply unit 118 supplies the set supply amount. of the first kneading water is supplied to the mixer 12 (step S52).
Then, the blade 1206 of the mixer 12 is rotated to knead the supplied cement, fly ash, quicklime, and first kneading water (step S54).
The step of supplying the cement, fly ash, and quicklime through the vibrating screen 24, supplying the first kneading water, and kneading (steps S50, 52, and 54) is referred to as the first kneading step.

Next, the hot water supply unit 120 supplies a set supply amount of hot water in which sodium sulfate is dissolved to the mixer 12 , and the aggregate supply unit 122 supplies a set supply amount of the second sand to the mixer 12 . (Step S56).
Then, the blade 1206 of the mixer 12 is rotated to knead the materials including the supplied hot water and the second sand (step S58).
The step of further supplying this hot water and the second sand and mixing them (steps S56, S58) is referred to as a second mixing step.

The processing from the supply of the second kneading water to the mixer 12 to the judgment of execution of kneading processing for a predetermined number of times (steps S60 to S64) is the same as in the first embodiment (steps S26 to 30). .
Here, the step of further supplying the second kneading water and kneading (steps S60, S62) is referred to as a third kneading step.
As shown in FIG. 2, when the kneading process shown in FIG. 5 is completed, the mortar produced by kneading in the mixer 12 is discharged from the mixer 12 and transferred to the belt conveyor 40 as in the first embodiment. It is transported to a molding machine (not shown). And a block is manufactured by compressing and compressing in a molding machine.

Here, in the kneading process shown in FIG. 5, the first kneading step is started after the empty kneading step is completed, the second kneading step is started after the first kneading step is completed, and the second kneading Although the case where the next step is started after the previous step is finished so that the third kneading step is started after the mixing process is finished, the previous step is continued as in the first embodiment. The next step may be started during or at the same time, and the kneading process performed by the kneading device 10 of the present embodiment is also adapted to the situation at the site and the amount of materials. Each step can be started at any timing.

Thus, according to the kneading device 10 of the second embodiment, the same effects as those of the first embodiment can be obtained. That is, even when mixing mortar or concrete with a large amount of powder and a small amount of water for mixing with respect to the powder, the formation of lumps is suppressed, which is advantageous in uniformly kneading the materials.
Therefore, when a block is manufactured from kneaded mortar or concrete, it is possible to manufacture a uniform block with few clumps. Become.
Further, since the water for kneading stored in the hot water tank 28 is warmed to a predetermined temperature, and the warm water stored in the hot water tank 28 and in which sodium sulfate is dissolved by stirring with the stirrer 2802 is supplied to the mixer 12 . , the sodium sulfate is easily dissolved and easily mixed with other materials in the mixer 12, which is advantageous for further suppressing the formation of lumps and uniformly kneading the materials.

Further, in the present embodiment, the first sand, which is part of the sand, is supplied to the mixer 12, and then the second sand, which is the remaining sand other than the first sand, is supplied to the mixer 12. The first kneading water that is part of the kneading water stored in the tank 26 is supplied to the mixer 12, and then the remaining kneading water that is stored in the water tank 26 excluding the first kneading water. 2 Since the kneading water is supplied to the mixer 12, the sand and the kneading water are dividedly supplied to further suppress the formation of lumps, which is advantageous in uniformly kneading the materials.

Further, as in the present embodiment, an empty kneading step of supplying and kneading the first sand that is a part of sand, cement, fly ash, and quicklime that have passed through the vibrating sieve 24 and stored in the water tank 26 a first kneading step of supplying and kneading the first kneading water which is a part of the kneading water; a second kneading step in which the second sand, which is the remaining sand excluding the first sand, is supplied and kneaded; 2. Perform a kneading method including a third kneading step of supplying kneading water and kneading. As a result, even when mixing mortar or concrete with a large amount of powder and a small amount of water for mixing with respect to the powder, the formation of lumps is suppressed, which is advantageous in uniformly mixing the materials.
Therefore, when a block is manufactured from kneaded mortar or concrete, it is possible to manufacture a uniform block with few clumps, which increases the compressive strength and suppresses the variation in the compressive strength, which is advantageous for improving the quality stability of the block. becomes.
The water for kneading stored in the hot water tank 28 is heated to a predetermined temperature, and in the second kneading step, hot water in which sodium sulfate is dissolved and stored in the hot water tank 28 is stirred by the stirrer 2802 to be supplied. With this configuration, sodium sulfate can be easily dissolved and easily mixed with other materials in the mixer 12, which is advantageous for further suppressing the formation of lumps and uniformly kneading the materials.
Further, by repeating the kneading method of the present embodiment for a predetermined number of times, the formation of lumps is further suppressed, which is advantageous in uniformly kneading the materials.

(Third Embodiment)
In this embodiment, in addition to the kneading process of the first embodiment, carbon dioxide (CO _{2 )} is further supplied and kneaded.
As shown in FIG. 6, the kneading device 50 of the present embodiment is configured by adding a CO ₂ cylinder 32 and a regulator 34 to the kneading device 10 of the first embodiment.

The CO ₂ cylinder 32 is a completely sealed pressure-resistant container for storing gas or liquid, and in the present embodiment, stores CO ₂ in a liquid form by compressing gaseous CO ₂ . CO ₂ is compressed under high pressure and enclosed in the CO ₂ cylinder 32 because it is more efficient to transport it as a liquid.
When a cock (not shown) attached to the CO ₂ cylinder 32 is opened, the CO ₂ is vigorously discharged. At that time, the CO ₂ becomes a powder-like ice-like solid due to the rapid pressure change and is discharged. be done. Also, CO ₂ evaporates at room temperature.

The regulator 34 is a pressure regulating device that regulates a high-pressure fluid (liquid or gas) to a predetermined pressure, and in this embodiment, regulates the pressure of CO ₂ discharged from the CO ₂ cylinder 32 .
The discharged CO ₂ is fed to mixer 12 .

As shown in FIG. 7, the control device 500 of the present embodiment is configured by adding a CO ₂ supply section 124 as a carbon dioxide supply section to the control device 100 of the first embodiment.
The CO ₂ supply unit 124 adjusts the pressure of the CO 2 discharged from the CO ₂ cylinder 32 by controlling the regulator 34 and supplies the pressure-adjusted CO ₂ to the _mixer 12 .

Next, the flow of the kneading process performed when producing mortar in the kneading device 50 of the present embodiment will be described.
The kneading process of the present embodiment differs from the kneading process of the first embodiment by supplying the CO ₂ discharged from the CO ₂ cylinder 32 to the mixer 12 and kneading the CO ₂ kneading process (carbon dioxide kneading). mixing step).
The timing of supplying CO ₂ can be any time after the cement (first powder) is supplied to the mixer 12 and during the kneading after all the mortar materials are supplied to the mixer 12. ing.
Therefore, referring to FIG. 4 of the first embodiment, it is possible at any time after the cement is supplied to the mixer 12 in step S18 until the third kneading step in step S28. ing.

In the present embodiment, for example, when all the mortar materials are supplied to the mixer 12 and kneaded, CO ₂ is supplied to the mixer 12 while ensuring the supply time of CO ₂ .
In other words, referring to FIG. 4 of the first embodiment, CO ₂ is supplied during the third kneading step of step S28.
The supply time of CO ₂ may be determined according to the purpose of accelerating the initial strength development of the mortar, fixing CO ₂ in the mortar, or both. 5 seconds to 1 minute, 30 seconds to 5 minutes, 10 minutes, and so on.

Thus, according to the kneading device 50 of the third embodiment, in addition to the same effects as those of the first embodiment, the following effects are obtained.
That is, since the CO ₂ supply unit 124 is further provided to supply the _{CO 2} discharged from the CO 2 cylinder 32 and whose pressure is adjusted by controlling the regulator 34 to the mixer 12, the CO ₂ and the cement or admixture undergo a carbonation reaction. As a result, it hardens and hardens into a congealed state, which is advantageous in increasing the initial strength of mortar and concrete.
After the cement is supplied, a kneading method further including a _CO2 kneading step of supplying _CO2 discharged from the _CO2 cylinder 32 and kneading is performed, thereby carbonating the _CO2 , the cement, and the admixture. It reacts and hardens and becomes a congealed state, which is advantageous in increasing the initial strength of mortar and concrete.

In the kneading device 50 of the present embodiment, an example is shown in which the CO ₂ cylinder 32, which is a container for storing CO 2 , is provided, _and the CO ₂ discharged from the CO ₂ cylinder 32 is supplied to the mixer 12. The method of supplying CO ₂ is not limited to this.
For example, the exhaust gas emitted from a power plant, a factory, or a power generator such as a voltaic power plant may be taken in as it is to supply CO ₂ . In this case, for example, the volume concentration of CO ₂ is 5% to 20% and the temperature is 40° C. or higher. Also, for example, the temperature of CO ₂ may be 100° C. or higher. Therefore, when CO ₂ is supplied from a power plant or the like in this way, the regulator regulates the temperature and concentration of CO ₂ and the pressure at the time of supply.

Further, the kneading process of the present embodiment is the kneading process of the first embodiment by adding a CO 2 kneading step of supplying the CO ₂ discharged _from the CO ₂ cylinder 32 to the mixer 12 and kneading it. However, a configuration may be adopted in which a CO ₂ kneading process is added to the kneading process of the second embodiment. Even in that case, the same effect as described above can be obtained.

The kneading device and the kneading method of the first to third embodiments have been described by applying them to the production of mortar, but the kneading devices of the first to third embodiments can also be applied to the production of concrete. and kneading methods are applicable.
For example, the case of producing concrete will be described below. In the kneading device 10 (50) of the embodiment described above, coarse aggregate such as gravel is first supplied to the mixer 12 . After that, fine aggregate such as sand, powder such as cement, and kneading water or warm water are supplied to the mixer 12 and kneaded by the kneading method of the first to third embodiments described above. When using a plurality of types of coarse aggregate, a plurality of silos (not shown) are provided for each type of coarse aggregate, and each type of coarse aggregate is supplied to the mixer 12 from each silo. Moreover, when supplying a plurality of types of coarse aggregates, the mixing ratio of the coarse aggregates can be arbitrarily set.
Even in the case of producing concrete with the kneading apparatus of the embodiment described above, the same effects as in the case of producing mortar can be obtained.

FIG. 8 shows the test results of the compressive strength of the block manufactured by the conventional kneading method and the block manufactured by the kneading method of the first embodiment.
Normally, a block is manufactured with a size of 20 cm × 10 cm × 6 cm, but in this example, it was cut into a size of 10 cm × 10 cm × 6 cm as a specimen for compression test, and a 10 cm × 10 cm surface was used as a loading surface. A compressive strength test was performed.
Compressive strength is generally evaluated based on the results of three tests, but in order to evaluate variations in materials, in this example, 12 specimens each were used to evaluate compressive strength.
As shown in the test results of FIG. 8, the block manufactured by kneading by the kneading method of the first embodiment has a compressive strength 1.9 N/mm ² greater than the block manufactured by the conventional kneading method. , the coefficient of variation indicating the variation in compressive strength is also reduced by 5.7%.
Therefore, the compressive strength is increased, and variations in the compressive strength are suppressed, which is advantageous in enhancing the quality stability of blocks.

10, 50 kneading device 12 mixer 14 cement silo 16 fly ash silo 18 quicklime silo 20 fine aggregate silo 22 sodium sulfate silo 26 water tank 28 hot water tank 2802 stirrer 30 shower 32 CO ₂ cylinder 34 regulator 100, 500 controller 102 Supply amount setting unit 104 Sodium sulfate supply unit 106 Stirrer control unit 108 Vibration screen control unit 110 First powder supply unit 112 Cement supply unit 114 Fly ash supply unit 116 Quick lime supply unit 118 Water supply unit 120 Hot water supply unit 122 Aggregate supply unit 124 _CO2 supply unit

Claims (10)

A kneading device for producing mortar or concrete by supplying a first powder containing cement and an admixture, a second powder constituting an additive, an aggregate, and kneading water to a mixer and kneading them. and
a vibrating screen that vibrates to pass the first powder;
a first tank in which part of the kneading water is stored;
a second tank storing the kneading water excluding the kneading water stored in the first tank and having a stirrer for agitating the kneading water;
a first powder supply unit that feeds the first powder into the vibrating screen and supplies the first powder that has passed through the vibrating screen to the mixer;
a first water supply unit that supplies the kneading water stored in the first tank to the mixer;
a second powder supply unit that supplies the second powder to the second tank;
a second water supply unit that supplies the mixer with the kneading water that is stored in the second tank and in which the second powder is dissolved by stirring with the stirrer;
an aggregate supply unit that supplies the aggregate to the mixer;
A kneading device comprising: The kneading water stored in the second tank is warm water heated to a predetermined temperature,
The second water supply unit supplies the hot water stored in the second tank and in which the second powder is dissolved by stirring with the stirrer to the mixer.
The kneading device according to claim 1, characterized by: A jetting device is further provided for feeding the kneading water stored in the first tank and the kneading water stored in the second tank in which the second powder is dissolved to the mixer. ,
3. The kneading device according to claim 1 or 2 , characterized in that: There are a plurality of types of the first powder,
Further comprising a plurality of containers each storing a plurality of types of the first powder, the second powder, and the aggregate,
3. The kneading device according to claim 1 or 2 , characterized in that: a pressure vessel in which liquid carbon dioxide is stored;
a pressure regulating device for regulating the pressure of the carbon dioxide discharged from the pressure vessel;
a carbon dioxide supply unit that supplies the carbon dioxide discharged from the pressure-resistant container and whose pressure is adjusted by controlling the pressure adjustment device to the mixer;
3. The kneading device according to claim 1 or 2 , characterized in that: A kneading device for producing mortar or concrete by supplying a first powder containing cement and an admixture, a second powder constituting an additive, an aggregate, and kneading water to a mixer and kneading them. A method of kneading performed in
The kneading device is
a vibrating screen that vibrates to pass the first powder;
a first tank in which part of the kneading water is stored;
a second tank storing the kneading water excluding the kneading water stored in the first tank and having a stirrer for agitating the kneading water;
a first kneading step of supplying and kneading the first powder that has passed through the vibrating screen and the first kneading water that is part of the kneading water stored in the first tank;
A second kneading step of supplying and kneading the aggregate and the kneading water stored in the second tank and in which the second powder is dissolved by stirring with the stirrer;
a third kneading step of supplying second kneading water, which is the remaining kneading water stored in the first tank after removing the first kneading water, and kneading;
A kneading method characterized by comprising A kneading device for producing mortar or concrete by supplying a first powder containing cement and an admixture, a second powder constituting an additive, an aggregate, and kneading water to a mixer and kneading them. A method of kneading performed in
The kneading device is
a vibrating screen that vibrates to pass the first powder;
a first tank in which part of the kneading water is stored;
a second tank storing the kneading water excluding the kneading water stored in the first tank and having a stirrer for agitating the kneading water;
An empty kneading step of supplying and kneading a first aggregate that is a part of the aggregate;
a first kneading step of supplying and kneading the first powder that has passed through the vibrating screen and the first kneading water that is part of the kneading water stored in the first tank;
Supplying the kneading water, which is stored in the second tank and in which the second powder is dissolved by stirring with the stirrer, and the second aggregate, which is the remaining aggregate excluding the first aggregate. a second kneading step of kneading and
a third kneading step of supplying second kneading water, which is the remaining kneading water stored in the first tank after removing the first kneading water, and kneading;
A kneading method characterized by comprising The kneading water stored in the second tank is warm water heated to a predetermined temperature,
In the second kneading step, the hot water stored in the second tank and in which the second powder is dissolved by stirring with the stirrer is supplied.
The kneading method according to claim 6 or 7 , characterized in that: The kneading device is
Further equipped with a pressure vessel in which liquid carbon dioxide is stored,
Further comprising a carbon dioxide kneading step of supplying and kneading the carbon dioxide discharged from the pressure vessel after the cement is supplied,
The kneading method according to claim 6 or 7, characterized in that: Repeating the kneading method according to claim 6 or 7 for a predetermined number of times,
The kneading method according to claim 6 or 7, characterized in that:

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