JP7145171B2 - Mixture generation system - Google Patents

Description

The present invention relates to a mixture production system for mixing powdered admixtures into concrete or mortar.

Admixtures are materials other than cement, water, and aggregates, and are materials that are added as necessary before placing concrete in order to give special properties to concrete or the like. The admixture may be already mixed with cement when concrete is kneaded, or may be used by being put into a mixer when kneading.
For example, the cement grout admixture described in Patent Document 1 is added to a cement grout by putting it into an agitator such as an agitator vehicle or a site-installed agitator at a cement grout placement site or a mixer installed at the site. has been added.

JP 2011-132041 A

However, if the admixture is in powder form, adding the admixture directly to the agitator wheel may result in insufficient dispersion of the admixture into the concrete. In this case, lumps of the admixture remain in the concrete, and the lumps may cause variations in the physical properties of the concrete after hardening or adversely affect it. In addition, in the method of adding a powdered admixture to concrete and then re-kneading it, although it is possible to mix the admixture with concrete without variation, it is necessary to prepare a separate mixer at the construction site. In addition, in this method, in the case of concrete having rapid hardening properties, it is necessary to wash the mixer at the construction site immediately after mixing, which increases the processing of washing water and the number of work steps. In order to solve these problems, it is important to establish a method of adding directly to the agitator wheel and improving the mixability with concrete.

When adding a powdered admixture to concrete that has arrived at a construction site, a method of adding a slurry of the admixture is exemplified as a method for improving the mixing property.
Slurrying of the powdery admixture can be carried out by stirring and mixing using a mixer at the construction site. However, when weighing, kneading, and adding materials to an agitator wheel manually, it is necessary to prepare and add several tens of kilograms of slurry multiple times per agitator wheel. In this case, a heavy object must be transported to the upper part of the mixer drum of the agitator vehicle, which is dangerous in terms of work. Moreover, when adding a powdery admixture to concrete as a slurry, a part of water is added to the concrete. Considering the durability of concrete, it is important to control the water-cement ratio.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a mixture producing system for efficiently mixing a powdered admixture into ready-mixed concrete transported to a construction site by an agitator vehicle.

The present inventors have made intensive research to achieve the above object, and have devised a system that can perform weighing, kneading, and feeding of powdered admixture to an agitator wheel without relying on human power. . In addition, the system minimizes human error of erroneous proportions between admixture and liquid when slurrying powdered admixture. This has enabled the inventors to achieve the above objectives.
The present invention is based on the above findings, and has the following gist.

(1) Slurry producing means for producing an admixture slurry from a powdered admixture and a liquid, admixture supply means for supplying the admixture to the slurry production means, and liquid supply means for supplying the liquid to the slurry production means. , metering means for measuring the amount of admixture supplied and the amount of liquid supplied to the slurry production means, setting means for setting the supply amount of the admixture and the amount of liquid supplied to the slurry production means, and slurry The supply amount of the admixture supplied by the admixture supply means and the liquid supply amount supplied by the admixture supply means so that the supply amount of the admixture and the liquid supply amount to the production means are the set supply amounts set by the setting means control means for controlling the amount of liquid supplied, pressure-feeding means for supplying the admixture slurry produced by the slurry-producing means to the pressure-feeding hose, and concrete conveying means having a storage and stirring mechanism for storing and stirring concrete. , the fluctuation range of the supply amount of the admixture controlled to the set supply amount by the control means is 3% by mass or less, and the fluctuation range of the liquid supply amount controlled to the set supply amount by the control means is 2% by mass or less, and the admixture slurry is supplied to the storage and stirring mechanism through a pumping hose to obtain a mixture of concrete and admixture slurry.
(2) The mixture production system according to (1) above, wherein the time from supplying the admixture and the liquid to completing the admixture slurry is within 120 seconds.
(3) The mixture production system according to (1) or (2) above, wherein the time from supplying the admixture to the slurry production means to supplying the admixture slurry to the storage/stirring mechanism is within 7 minutes.
(4) further comprising retarder water storage means for storing retarder water and retarder water pressure-feeding means for supplying retarder water to the retarder water pressure-feeding hose; Any one of the above (1) to (3), wherein the retarder water is supplied to the stirring mechanism through the retarder water pressure-feeding hose using the retarder water pressure-feeding means, and the storage and stirring mechanism is washed with the retarder water. The mixture generation system according to .
(5) The liquid storage means for storing the liquid and the power supply means for supplying power for driving the control means are further provided, and the means other than the concrete transfer means are mounted on the same mobile carriage. The mixture generation system according to any one of (1) to (4).
(6) The mixture production system according to any one of (1) to (5) above, wherein the concrete conveying means is an agitator vehicle.
(7) The admixture supply means includes a powder supply screw shaft that is rotationally driven about its axis and supplies the admixture in the axial direction, and a variable speed drive motor that rotationally drives the powder supply screw shaft in a variable speed manner. The mixture generating system according to any one of the above (1) to (6), which has a rotation speed and adjusts the supply amount of the admixture.
(8) The slurry manufacturing means includes a stirring tank, a rotating shaft provided at the bottom of the stirring tank and extending vertically in the stirring tank, and stirring blades attached to the rotating shaft, and the stirring blades are connected to the rotating shaft. and a plurality of stirring blades extending radially outward from the central portion. The material passing part is formed by providing the stirring blades with a gap between the adjacent stirring blades, and the auxiliary blade part is fixed to the tip side in the radial direction of the stirring blade. The blade part has an annular shape or a flat plate shape obtained by dividing the annular shape. The mixture generating system according to any one of the above (1) to (7), which includes a portion located radially outward of the system.
(9) Admixtures include fly ash, ground granulated blast furnace slag, silica fume, expansive agents, quick-hardening agents, quick-setting agents, high-strength admixtures, fine limestone powder, crushed stone powder, sludge powder, and fine powder of sewage sludge. The mixture generating system according to any one of (1) to (8) above, which is at least one admixture selected from the group consisting of:

According to the present invention, it is possible to provide a mixture production system for efficiently mixing a powdery admixture into ready-mixed concrete transported to a construction site by an agitator vehicle.

FIG. 1 is a diagram for explaining a mixture generation system 1 in one embodiment of the present invention. FIG. 2(a) is a diagram for explaining the slurry production device in the mixture production system 1 according to one embodiment of the present invention, and FIG. 2(b) explains the stirring blades provided in the slurry production device. It is a figure for doing. FIG. 3 is a diagram for explaining an admixture supply device in the mixture production system 1 according to one embodiment of the present invention. FIG. 4 is a diagram for explaining washing of the agitator wheel in a modified example of the mixture generating system 1 according to one embodiment of the present invention. FIG. 5 is a diagram for explaining the mounting of a modified example of the mixture generation system 1 in one embodiment of the present invention on a mobile carriage. FIG. 6 is a diagram for explaining a continuous mortar kneading device.

A mixture generation system 1 according to an embodiment of the present invention will be described below with reference to FIG. A mixture production system 1 in one embodiment of the present invention obtains a mixture of concrete and admixture slurry 4 . A mixture production system 1 according to one embodiment of the present invention comprises a slurry production means 10 for producing an admixture slurry 4 from a powdery admixture 2 and a liquid 3; Supply means 20, liquid supply means 30 for supplying the liquid 3 to the slurry production means 10, measuring means 40 for measuring the supply amount of the admixture 2 and the supply amount of the liquid 3 supplied to the slurry production means 10, slurry A setting means 51 for setting the supply amount of the admixture 2 and the supply amount of the liquid 3 to be supplied to the production means 10, and the setting means 51 for setting the supply amount of the admixture 2 and the supply amount of the liquid 3 to the slurry production means 10. A control means 50 for controlling the supply amount of the admixture 2 supplied by the admixture supply means 20 and the supply amount of the liquid 3 supplied by the liquid supply means 30 so as to achieve the set supply amount set by; It has a pressure-feeding means 60 for supplying the admixture slurry 4 produced by the production means 10 to a pressure-feeding hose 61, and a concrete conveying means 70 having a storage/stirring mechanism 71 for storing/stirring the concrete. The admixture slurry is then supplied to the storage/stirring mechanism 71 through the pumping hose 61 . The mixture generating system 1 according to one embodiment of the present invention has the configuration as described above, so that the powdery admixture can be efficiently mixed with the ready-mixed concrete transported to the construction site by the agitator vehicle. can be done.

(Slurry manufacturing means)
The slurry manufacturing means 10 manufactures the admixture slurry 4 from the powdered admixture 2 and the liquid 3 . The slurry manufacturing means 10 is, for example, the slurry manufacturing apparatus 10 shown in FIG. The slurry production apparatus 10 will be described in more detail with reference to FIG.

FIG. 2(a) is a diagram for explaining the slurry production device 10 in the mixture production system 1 in one embodiment of the present invention, and FIG. 2(b) explains the stirring blades provided in the slurry production device 10. It is a figure for doing. The slurry production apparatus 10 is an apparatus for producing an admixture slurry by agitating and mixing a powdery admixture and a liquid. The slurry manufacturing apparatus 10 includes a stirring tank 11, a rotating shaft 12 provided at the bottom of the stirring tank 11 and extending vertically in the stirring tank 11, a driving device 13 for rotating the rotating shaft 12, and an attachment to the rotating shaft 12. A stirring blade 14 is provided.

The stirring tank 11 contains the admixture 2 supplied from the admixture supply means 20 and the liquid 3 supplied from the liquid supply means 30, and also contains the admixture slurry 4 produced from the admixture 2 and the liquid 3. . The shape of the stirring tank 11 is not particularly limited, but it is preferable that the stirring tank 11 is a rectangular housing with an open top when viewed from above.

The rotating shaft 12 transmits the driving force generated by the driving device 13 to the stirring blade 14 to rotate the stirring blade 14 . The bottom of the stirring vessel 11 is provided with through-holes for the inside and outside, and a rotating shaft is passed through the through-holes. The space between the inner circumference of the through hole and the rotating shaft 12 is sealed by a well-known sealing means (not shown) so as to prevent leakage of the material contained in the stirring vessel 11 . A stirring blade-side pulley 121 is provided below the rotating shaft 12 , and the driving force of the driving device 13 is transmitted to the rotating shaft 12 via the belt 15 . Note that the driving force of the driving device 13 may be transmitted to the rotating shaft 12 via gears. Alternatively, a driving device may be arranged below the rotating shaft 12 so that the driving device directly rotates the rotating shaft. The rotational speed of the rotary shaft 12 is, for example, 750-1000 rpm.

The driving device 13 is an internal combustion engine or an electric motor that generates driving force for rotating the stirring blades 14 . A driving device side pulley 131 is provided below the driving device 13 , and driving force is transmitted to the belt 15 via the driving device side pulley 131 . Then, as described above, the driving force transmitted to the belt 15 is transmitted to the rotating shaft 12 via the stirring blade side pulley 121, thereby rotating the stirring blade . By having such a configuration, the load of the driving device 13 can be made constant, the fluctuation of the current value supplied to the driving device can be reduced, and the vibration of the slurry manufacturing apparatus 10 can be reduced.

The stirring blade 14 stirs and mixes the admixture 2 supplied from the admixture supply means 20 and the liquid 3 supplied from the liquid supply means 30 . This produces an admixture slurry. The stirring blade 14 has a central portion 141 connected to the rotating shaft and a plurality of stirring blades 142 extending radially outward from the central portion 141 . The stirring blades 142 extend radially outward from the periphery of the central portion 141 and are obliquely provided so that the front ends of the stirring blades 142 are higher than the rear ends. The stirring blades 14 preferably have 2 to 10 stirring blades, more preferably 3 to 6 blades, still more preferably 3 to 4 blades.

A material passage portion 143 is formed by providing the stirring blades 142 with an interval between adjacent stirring blades 142 . The stirring blades 14 are rotated by the rotation of the rotary shaft 12 , so that the mixing material slurry in the stirring tank 11 can be moved downward from the material passage portion 143 by the stirring blades 142 . As a result, the vortex of the admixture slurry generated in the agitating tank 11 can be increased, the admixture and the liquid can be uniformly mixed throughout the agitation tank 11, and a uniform admixture slurry can be produced in a short time. can be manufactured.

An auxiliary blade portion 144 is fixed to the tip side of the stirring blade 142 in the radial direction. The auxiliary blade portion 144 has an annular shape, is provided outside the material passing portion 143 with respect to the inner and outer directions of the rotation diameter, and is radially outside the tip of the stirring blade 142 in the radial direction. has a portion located in The auxiliary blade portion 144 can suppress upward movement of the material pushed downward from the material passage portion 143 by the stirring blade 142 and bounced off the bottom of the stirring vessel 11 . In addition, the auxiliary wing portion 144 may have a flat plate shape obtained by dividing the ring.

The slurry manufacturing apparatus 10 includes a discharge port 16 for discharging the manufactured admixture slurry, a discharge port cover 17 for controlling opening and closing of the discharge port 16, and a pumping means 60 for supplying the discharged admixture slurry. A discharge chute 18 is further provided.
By producing the admixture slurry with the discharge port 16 closed by the discharge port cover 17, the admixture slurry can be produced in batch mode. After producing the admixture slurry, the discharge port cover 17 is moved in the direction of the arrow in FIG. can supply.

The slurry production means 10 having the above configuration can produce a uniform admixture slurry from the admixture and the liquid in a short period of time.

The time from when the admixture and the liquid are supplied to the slurry production apparatus 10 until the slurry production apparatus 10 completes the admixture slurry is preferably within 120 seconds, more preferably within 90 seconds, and further Preferably within 60 seconds. As a result, even if slurry production is started after the agitator vehicle arrives at the construction site, the waiting time after the agitator vehicle arrives at the construction site can be shortened. The finished admixture slurry is a slurry in which no clumps of the admixture remain.

The admixture used for producing the slurry is not particularly limited as long as it is a powdered admixture. Admixtures include, for example, fly ash, ground granulated blast furnace slag, silica fume, expansive agents, rapid hardening agents, quick setting agents, admixtures for high strength, fine limestone powder, crushed stone powder, sludge powder, and fine powdered sewage sludge. at least one admixture selected from the group;
The admixture used in the mixture generation system 1 in one embodiment of the present invention is preferably an admixture added to concrete at the construction site. Such admixtures include, for example, quickening agents, quick setting agents and expanding agents.

Rapid hardening materials used in the mixture generating system 1 in one embodiment of the present invention include, for example, calcium fluoroaluminate (11CaO.7Al ₂ O ₃ CaF ₂ ) rapid hardening materials, amorphous calcium aluminate (12CaO. 7Al ₂ O ₃ )-based quick-hardening materials, Auin-based quick-hardening materials, alumina cement-based quick-hardening materials, water glass-based quick-hardening materials, and the like.

Examples of quick-setting agents used in the mixture generating system 1 in one embodiment of the present invention include inorganic salt-based quick-setting agents and cement mineral-based quick-setting agents. Examples of inorganic salt quick-setting agents include sodium-containing carbonates, aluminates, silicates, aluminum sulfate, alum, and the like. Examples of cement mineral quick setting agents include calcium aluminate and calcium sulfoaluminate.

The expanding material used in the mixture generating system 1 in one embodiment of the present invention includes, for example, calcium sulfoaluminate (CSA)-based expanding material, lime-based expanding material, lime-CSA-based expanding material, and the like. Normally, since an agitator wheel cannot disperse the expansive material uniformly, the introduction of the expansive material into the agitator wheel and the kneading thereof are prohibited. However, in the mixture generating system according to one embodiment of the present invention, even if the expansive material is supplied to the agitator wheel, the expansive material can be uniformly dispersed in the concrete. As a result, there is no need to prepare a separate mixer for uniformly dispersing the expansive material in the concrete.

The liquid used for producing the slurry is not particularly limited as long as it can be added to concrete. The liquid is, for example, water or a liquid containing water. The water-containing liquid may contain, for example, liquid admixtures in addition to water. Examples of liquid admixtures include AE agents, water reducing agents, AE water reducing agents, high performance water reducing agents, high performance AE water reducing agents, fluidizing agents, shrinkage reducing agents, durability improving agents, quick setting agents, and dust reducing agents. , a rapid hardening agent, a setting/curing time adjusting agent, a thickener, a separation reducing agent, a waterproof agent, an antirust agent, a cold resistance promoter, a foaming agent, a foaming agent, and the like.

In addition, if the slurry production means used in the mixture generation system in one embodiment of the present invention is capable of producing an admixture slurry from a powdered admixture and a liquid, it is shown in FIG. It is not limited to the slurry production device 10 . For example, a continuous mortar kneading device shown in FIG. 6 can be used as slurry production means. A continuous mortar kneading apparatus will be described below with reference to FIG.

FIG. 6 is a diagram for explaining the continuous mortar kneading device 10C. The continuous mortar kneading device 10C is a device for continuously producing mortar, but it is also possible to produce an admixture slurry from a powdered admixture and a liquid. The continuous mortar kneading device 10C includes a powder supply section 11C and a slurry kneading section 12C.

The powder supply section 11C has a powder supply screw shaft 114C and a variable speed drive motor 116C, and is configured to be able to adjust the supply amount of the admixture by the rotational speed of the powder supply screw shaft 114C.

The powder supply screw shaft 114C is driven to rotate about its axis by a variable speed drive motor 116C inside a hollow cylindrical casing 113C, and supplies (moves) the admixture in the axial direction. The powder feed screw axis 114C is preferably horizontal, but may be inclined.

The powder supply screw shaft 114C has a spiral blade 114Ca provided in the vicinity of the discharge port (left side in the figure) and a spiral blade 114Ca positioned upstream (right side in the figure) from the spiral blade 114Ca to loosen the mixed material and supply it to the spiral blade 114Ca. It has a plurality of stirring plates 114Cb.
The spiral blade 114Ca is a continuous spiral blade with three or more pitches, and the admixture is confined between the surrounding hollow cylindrical tube 115C and supplied axially leftward. The hollow cylindrical tube 115C is fixed so as not to rotate within the casing 113C.

In addition, the stirring plate 114Cb is a flat plate or an inclined plate extending in the radial direction, and inside the casing 113C, the mixed material that has formed a lump is loosened and moved leftward in the axial direction to uniformly disperse the mixed material on the spiral blade 114Ca. is designed to supply
Note that the stirring plate 114Cb is not limited to this configuration, and may be a spiral blade that has a larger pitch than the spiral blade 114Ca and is divided at a predetermined pitch.

The variable speed drive motor 116C is an electric motor with a reduction gear, preferably inverter-controlled, and rotationally drives the powder supply screw shaft 114C in a variable speed manner.

With the above-described configuration, even if the mixed material is supplied in a lump, the mixed material is loosened and uniformly dispersed by the stirring plate 114Cb, and the uniformly dispersed mixed material is stably supplied to the spiral blade 114Ca. can confine the admixture between the hollow cylindrical tube 115C and provide a feed rate approximately proportional to the rotational speed.

The powder supply section 11C further has a powder hopper 118C. The powder hopper 118C is located above the powder supply screw shaft 114C and receives and holds the admixture from above. The powder hopper 118C preferably has a rectangular opening along the powder supply screw shaft 114C at its lower end, and has a funnel shape with its upper portion widening in the width direction.

The slurry kneading section 12C has a slurry kneading shaft 124C and a variable speed drive motor 126C, and is configured to be able to adjust the properties of the mixed material slurry by the rotational speed of the slurry kneading shaft 124C.

Inside the hollow cylindrical casing 123C, the slurry kneading shaft 124C is rotationally driven by a variable speed drive motor 126C around the axis, and mixes and kneads the admixture and the liquid to continuously produce the admixture slurry. do.
In this figure, a slurry kneading shaft 124C connects a plurality of inclined plates 124Ca that move the mixed material slurry in the axial direction while mixing the mixed material and the liquid, and a shaft that connects the outer peripheral portions of the two adjacent inclined plates 124Ca. It has a plurality of kneading plates 124Cb extending in the direction.
The inclined plate 124Ca is a rectangular inclined plate extending in the radial direction, and moves the mixed material slurry in the axial direction (to the left in the figure) while mixing the mixed material and the liquid on its inclined surface. Further, the kneading plate 124Cb is a flat plate extending in the axial direction, and promotes kneading of the mixed material slurry to obtain the necessary properties of the mixed material slurry.

A hollow cylindrical casing 123C is connected to the outlet side lower end of the casing 113C of the powder supply section 11C via a swing shaft 122C. Moreover, it has a fixing metal fixture (not shown) which fixes the casing 123C in an inclined state.
With this configuration, the slurry kneading shaft 124C can be variably adjusted with respect to the horizontal within a range of about ±30 degrees.
The slurry kneading shaft 124C is set so that the supply side of the mixed material (right side in the drawing) is low and the outlet side of the mixed material slurry (left side in the drawing) is high, so that the axis of the slurry kneading shaft 124C is about 30 degrees from the horizontal. By adjusting the range, even when the rotational speed of the slurry kneading shaft 124C is the same, it is possible to adjust the movement speed and discharge speed of the mixed material slurry by the inclination angle.
Conversely, by lowering the outlet side (left side in the drawing) of the admixture slurry, the movement speed and discharge speed of the mortar can be increased, and the drainage can be made smooth when cleaning the inside.

The variable speed drive motor 126C is an electric motor with a reduction gear, preferably inverter-controlled, and rotationally drives the slurry kneading shaft 124C in a variable speed manner.

With the above-described configuration, even when the supply amount of the mixing material supplied from the powder supply unit 11C is changed according to the scale of the construction work, the rotation speed of the slurry kneading unit 12C can be adjusted and the slurry kneading shaft 124C can be adjusted. By adjusting the inclination angle, it is possible to adjust the properties of the admixture slurry in accordance with the supply amount of the admixture.

The continuous mortar kneading apparatus 10C having the above-described configuration can produce a uniform mixed material slurry from the mixed material and the liquid in a short period of time.

As the slurry manufacturing means, the above-described slurry manufacturing apparatus and the above-described continuous mortar kneading apparatus are preferable, and the above-described slurry manufacturing apparatus is more preferable. However, as long as a homogeneous admixture slurry can be produced from the admixture and the liquid in a short time, the slurry production means is not limited to the above-described slurry production apparatus and the above-described continuous mortar kneading apparatus. For example, a drum-type gravity mixer, a tilt-type gravity-type mixer, a pan-type forced kneading mixer, a pug mill-type forced kneading mixer, and the like can be used as slurry production means.

A commercially available mixer can be used as the slurry production means used in the mixture generation system in one embodiment of the present invention. For example, Okasan Kiko Co., Ltd. grout mixer "OKZ-30" (model number), grout mixer "OKZ-50N" (model number), grout mixer "OKZ-100N" (model number) and grout mixer "OKZ-150N" ( model number), etc. can be used as slurry production means.

The slurry produced by the mixture generation system in one embodiment of the present invention may contain materials other than the admixture material and the liquid as long as the effect of the mixture generation system in one embodiment of the present invention is not impaired.
In addition, the slurry produced by the mixture production system in one embodiment of the present invention preferably excludes concrete, mortar and cement paste.

(Means for supplying admixture)
The admixture supply means 20 supplies the admixture 2 to the slurry production means 10 . The admixture supply means 20 is, for example, the admixture supply device 20 shown in FIG. The admixture feeder 20 will be described in further detail with reference to FIG. The admixture supply device 20 includes, for example, a powder supply screw shaft 24 that is rotationally driven about its axis and supplies the admixture in the axial direction, and a variable speed drive motor that rotationally drives the powder supply screw shaft 24 so as to be variable speed. 26, and adjusts the supply amount of the admixture by its rotation speed.

The powder feed screw shaft 24 is driven to rotate about its axis by a variable speed drive motor 26 inside a hollow cylindrical casing 23 to feed (move) the admixture in the axial direction.
The powder supply screw shaft 24 has a spiral blade 24a. The spiral blade 24a is a continuous spiral blade with three or more pitches, and is adapted to feed leftward in the axial direction.
The variable speed drive motor 26 is an electric motor with a reduction gear, preferably inverter-controlled, and drives the powder supply screw shaft 24 to rotate at variable speed.

The admixture feeder 20 further includes a powder hopper 28 . The powder hopper 28 is positioned above the powder feed screw shaft 24 and receives and holds the admixture from above. The powder hopper 28 preferably has a rectangular opening along the powder supply screw shaft 24 at its lower end, and has a funnel shape with its upper portion widening in the width direction.
The hopper 28 has an internal volume of, for example, 100 kg or more, and in a state in which a large flexible container 4 (for example, a ton pack) is lifted, its lower end is opened so that a large amount of admixture can be supplied in batches from above. It's becoming Note that the capacity of the hopper 28 can be selected according to the application.

The admixture supply device 20 has an admixture supply speed higher than the maximum processing amount of the slurry production means 10, detects the remaining amount of the raw material powder 1 in the slurry production means 10 by a sensor (not shown), and turns ON/OFF. Admixture is intermittently supplied.
The admixture is discharged from the discharge port 29 of the admixture supply device 20 and supplied to the slurry production device 10 .

In addition, if the admixture supply means used in the mixture production system in one embodiment of the present invention can supply the powdered admixture to the slurry production means, the admixture shown in FIG. 1 or FIG. It is not limited to supply device 20 . For example, a belt feeder capable of conveying the powdered admixture or a pipe capable of distributing the powdered admixture can be used as the admixture supplying means.

(liquid supply means)
The liquid supply means 30 supplies the liquid 3 to the slurry production means 10 . The liquid supply means 30 is, for example, a submersible pump 30 that pumps up the liquid stored in the liquid storage means 31 and sends the pumped-up liquid to the slurry production means 10 (see FIG. 1).
Note that the liquid supply means 30 is not limited to a submersible pump as long as it can supply the liquid 3 to the slurry production means 10 . For example, the liquid supply means 30 may be a liquid storage tank provided above the slurry production means 10 . In this case, gravity is used to supply the liquid from the liquid storage tank to the slurry production means 10, and the amount of liquid supplied to the slurry production means 10 is adjusted using a valve provided in the liquid storage tank.
A flow meter may be provided between the liquid supply means 30 and the slurry production means 10 in order to control the amount of liquid supplied to the slurry production means 10 .

(weighing means)
The metering means 40 measures the supply amount of the admixture 2 and the supply amount of the liquid 3 supplied to the slurry production means 10 . The metering means 40 may be, for example, a load cell 40 that measures the mass of admixture and liquid supplied to the slurry production means 10 (see FIG. 1).
For example, the mass (W1) of the slurry manufacturing apparatus 10 before supplying the admixture and the liquid is measured by the load cell 40, and then the mass (W2) of the slurry manufacturing apparatus 10 after supplying the admixture is measured by the load cell 40. do. Thereby, the mass (W2-W1) of the admixture supplied to the slurry manufacturing apparatus 10 can be calculated. Further, the load cell 40 measures the mass (W3) of the slurry manufacturing apparatus 10 after supplying the liquid. Thereby, the mass (W3-W2) of the liquid supplied to the slurry manufacturing apparatus 10 can be calculated. Alternatively, the liquid may be supplied first to measure the mass of the slurry production apparatus 10, and then the admixture may be supplied to measure the mass of the slurry production apparatus 10. FIG.
Also, the weighing means may measure the mass of the admixture and the liquid, or may measure the volume.
Note that the weighing means 40 is not limited to the load cell 40 as long as it can measure the amount of admixture and the amount of liquid supplied to the slurry manufacturing means 10 . For example, the metering means includes a metering tank provided between the slurry production means and the admixture supply means for measuring the supply amount of the admixture, and a meter provided between the slurry production means and the liquid supply means for measuring the supply amount of the liquid. It may be a tank.

(setting means)
The setting means 51 sets the supply amount of the admixture and the supply amount of the liquid to be supplied to the slurry production means 10 . The setting means 51 is, for example, the control panel 51 of the control device 50 (see FIG. 1).
The setting means is not limited to the control panel 51 of the control device 50 as long as it can set the supply amount of the admixture and the supply amount of the liquid supplied to the slurry production means 10 . For example, the setting means may be a setting input device provided separately from the control device 50 for inputting and setting the supply amount of the admixture and the supply amount of the liquid.

(control means)
The control means 50 adjusts the admixture supplied by the admixture supply means 20 so that the supply amount of the admixture 2 and the supply amount of the liquid 3 to the slurry production means 10 are the set supply amounts set by the setting means 50. The supply amount of the material 2 and the supply amount of the liquid 3 supplied by the liquid supply means 30 are controlled. The control means 50 is, for example, the control device 50 shown in FIG. The control device 50 has, for example, a microprocessor and its peripheral circuits, and uses a RAM as a work area to execute a control program stored in a ROM to perform various controls. For example, the control device 50 controls the supply amount of the admixture and the supply amount of the liquid as follows.

First, only liquid is supplied to the slurry manufacturing apparatus 10 . A flow meter (not shown) measures the flow rate of the liquid to the slurry manufacturing apparatus 10 , and the load cell 40 is used to measure the mass of the liquid supplied to the slurry manufacturing apparatus 10 . This operation is performed while changing the flow rate of the liquid to the slurry manufacturing apparatus 10 . Then, using the measurement result of the liquid flow rate measured by the flow meter and the measurement result of the liquid supply amount to the slurry production apparatus 10 measured by the load cell 40, the flow rate of the liquid measured by the flow meter and the slurry A relationship with the actual amount of liquid supplied to the manufacturing apparatus 10 is investigated. That is, liquid calibration is performed.

Next, only the admixture is supplied to the slurry production apparatus 10 . Then, the supply amount of the admixture supplied to the slurry production apparatus 10 is measured using the load cell 40, and the relationship between the inverter frequency of the variable speed drive motor 26 and the supply amount of the admixture supplied to the slurry production apparatus 10 is determined. investigate. That is, the admixture is calibrated.

The control device 50 controls the amount of liquid pumped by the submersible pump 30 so that the flow rate of the liquid measured by the flow meter corresponds to the set supply amount set by the setting means 50 . Further, the control device 50 adjusts the inverter frequency of the variable speed drive motor 26 of the admixture supply device 30 so that the inverter frequency of the variable speed drive motor 26 corresponds to the set supply amount set by the setting means 50 . to control. As a result, the control device 50 causes the admixture supply device 20 to supply the admixture supply amount and the liquid supply amount to the slurry production apparatus 10 so as to be the set supply amounts set by the setting means 50. The amount of admixture supplied and the amount of liquid supplied by the submersible pump 30 can be controlled.

As described above, by controlling the supply amount of the admixture and the supply amount of the liquid, the fluctuation range of the supply amount of the admixture controlled to the set supply amount by the control means 50 is made 3% by mass or less. and preferably 2% by mass or less. Furthermore, the fluctuation width of the liquid supply amount controlled to the set supply amount by the control means 50 can be 2% by mass or less, preferably 1% by mass or less.

In addition, the fluctuation range of the supply amount of the admixture controlled by the control means 50 to be the set supply amount can be 3% by mass or less, and the liquid controlled by the control means 50 to be the set supply amount The control method of the control means is not limited to the above-described control method based on calibration, as long as it is a control method capable of reducing the fluctuation width of the supply amount of 2% by mass or less. For example, while actually measuring the supply amount of the admixture and the supply amount of the liquid, the supply amount of the admixture and the amount of the liquid are adjusted so that the supply amount of the admixture and the supply amount of the liquid become the set supply amount. You may make it control the supply amount. In this case, first, only the liquid is supplied to the slurry production means 10 while measuring the supply amount of the liquid using the measuring means 40, and when the supply amount of the liquid reaches the set supply amount, the supply of the liquid is stopped. Next, only the admixture is supplied as a liquid and supplied to the slurry production means 10 while measuring the supply amount of the admixture using the metering means 40, and when the supply amount of the admixture reaches the set supply amount, Stop feeding admixture. Mixing of the admixture and the liquid is then initiated. In this case, the admixture may be supplied first, and then the liquid may be supplied.

(pumping means)
The pumping means 60 supplies the admixture slurry 4 produced by the slurry producing means 10 to the pumping hose 61 . The compressing means 60 is, for example, a compressing pump 60 (see FIG. 1). The pressure-feeding pump 60 can supply the slurry produced by the slurry production apparatus 10 through a pressure-feeding hose 61 to concrete conveying means 70, which is, for example, 50 to 100 m away. Thereby, even if the distance between the slurry manufacturing means 10 and the concrete conveying means 70 is large, the admixture slurry manufactured by the slurry manufacturing means 10 can be supplied to the storage/stirring mechanism 71 of the concrete conveying means 70.

Since the slurry produced by the slurry production apparatus 10 is pressureless or low pressure, the force-feeding pump 60 requires a sufficient pressurization capacity to supply the slurry to a remote location via the force-feeding hose 61 . For example, a well-known snake pump can be used as the compressing pump 60 .
The pumping means is not limited to the pump 60 as long as it can supply the admixture slurry produced by the slurry producing means to the pumping hose. For example, the pumping means may be a piston pump or a squeeze pump.

(concrete conveying means)
The concrete conveying means 70 has a storage/stirring mechanism 71 for storing and stirring concrete. The concrete conveying means 70 is, for example, an agitator wheel 70 (see FIG. 1). The agitator wheel 70 has a mixer drum 71 for storing and stirring concrete. The mixer drum 71 has spiral blades inside, and when the mixer drum 71 rotates, the concrete stored in the mixer drum 71 is agitated.
The concrete conveying means is not limited to the agitator wheel 70 as long as it has a storage/agitation mechanism 71 for storing and agitating concrete. For example, the concrete conveying means may be a truck mixer.

As mentioned above, the admixture slurry is fed through the pumping hose 61 to the storage and stirring mechanism 71 . As a result, the admixture slurry can be uniformly mixed with the concrete stored in the storage/stirring mechanism 71 by executing the stirring function of the storage/stirring mechanism 71 .

According to the mixture generation system 1 in one embodiment of the present invention, the time from supplying the liquid or admixture to the slurry production means 10 to supplying the admixture slurry to the storage/stirring mechanism 71 is preferably 7 It can be done within minutes, more preferably within 5 minutes. As a result, it is possible to shorten the time from when the concrete transport means arrives at the construction site until the concrete is unloaded, and the concrete can be transported efficiently.

The mixture generation system 1 in one embodiment of the present invention can be modified as follows.

(Modification 1)
As shown in FIG. 4, a mixture generating system 1A in Modification 1 of the mixture generating system 1 according to one embodiment of the present invention includes retarder water storage means 150 for storing retarder water 5, It further has a retarder water pressure-feeding means 160 for supplying the retarder water pressure-feeding hose 161, and after the mixture is discharged from the concrete conveying means 70, the retarder water pressure-feeding means 160 is used to pump the retarder water 5 through the retarder water pressure-feeding hose 161. is supplied to the storage/stirring mechanism 71 , and the storage/stirring mechanism 71 may be washed with the retarder water 5 . As a result, the storage/stirring mechanism 71 can be cleaned while suppressing the condensation of the concrete remaining in the storage/stirring mechanism 71, so that the storage/stirring mechanism 71 can be cleaned cleanly. In addition, since the cleaning of the storage/stirring mechanism 71 can be started immediately after the concrete is discharged from the storage/stirring mechanism 71, the storage/stirring mechanism 71 can be cleaned cleanly from this point as well.

<Retardant water storage means>
The retarder water storage means 150 stores the retarder water 5 . The retarder water storage means 150 is, for example, a retarder water storage tank 150 (see FIG. 4).
The retarder water storage means is not limited to the retarder water storage tank 150 as long as it can store the retarder water.
In order to supply retarder water from retarder water storage means 150 to retarder water pumping means 160 described later, retarder water storage means 150 may be provided with retarder water supply means 151 such as a submersible pump. good.

<Retardant water>
The retarder water 5 is water containing a retarder. The retarder used in the retarder water 5 includes, for example, an inorganic retarder and an organic retarder. Inorganic retarders include, for example, phosphates, silicofluorides, complexes of silicofluoride salts and phosphates, copper hydroxide, boric acid, zinc oxide, zinc chloride, mixtures of zinc carbonate and lead oxide. , a mixture of copper carbonate and urea, and the like. Examples of organic retarders include oxycarboxylic acids and salts thereof, ketocarboxylic acids, aldose acids, uronic acids, ketose acids, sugars, sugar alcohols, cellulose derivatives, and water-soluble polymers such as polyvinyl alcohol. etc.

<Retardant water pumping means>
The retarder water pumping means 160 supplies the retarder water 5 to the retarder water pumping hose 161 . The retarding agent water pumping means 160 is, for example, a pumping pump 160 (see FIG. 4). The pressure-feeding pump 160 supplies the retarder water stored in the retarder water storage tank 150 to the concrete conveying means 70 which is, for example, 50 to 100 m away through the retarder water pressure-feeding hose 161 . As a result, even if the distance between the slurry producing means 10 and the concrete conveying means 70 is somewhat large, the storage/agitation mechanism 71 of the concrete conveying means 70 can be cleaned cleanly.
Since the retarder water stored in the retarder water storage tank 150 is pressureless or low pressure, the pressure pump 160 requires sufficient pressurization capacity to supply to a remote location via the pressure hose 161. . For example, a well-known snake pump can be used as the compressing pump 160 .
The retarder water pumping means is not limited to the pumping pump 160 as long as it can supply the retarder water stored in the retarder water storage tank 150 to the pumping hose. For example, the retarder water pumping means may be a piston pump or a squeeze pump.
Alternatively, the pumping means 60 may be used as the retarding agent water pumping means 160 .

As shown in FIG. 4, a retarder water sprayer 162 may be provided at the tip of the pumping hose. As a result, the retarder water can be vigorously sprayed into the inside of the storage/stirring mechanism 71, so that the storage/stirring mechanism 71 can be cleaned more cleanly. The retarder water sprayer 162 mixes the retarder water supplied from the pressure feed hose 161 with the compressed air using a nozzle (not shown), and injects the mixture of the retarder water and the compressed air.
Further, in FIG. 4, the retarder water sprayer 162 is operated by a human, but it can also be operated automatically or mechanically.

(Modification 2)
As shown in FIG. 5, a mixture generation system 1B according to Modification 2 of the mixture generation system 1 according to the embodiment of the present invention includes liquid storage means 31 for storing liquid and power for driving the control means 50. The power supply means 170 may be further provided, and the means other than the concrete transfer means 70 may be mounted on the same mobile carriage 200 . Thereby, the main means of the mixture production system 1B can be easily transported, and the flexibility of the mixture production system 1B can be enhanced.

The mobile truck 200 is a truck 200 in this example, but it may be a trailer or a simple truck.
In this figure, a mobile carriage 200 has thereon slurry production means 10, admixture supply means 20, liquid supply means 30, liquid storage means 31, metering means 40, control means 50, retardant water storage means 150 and power supply. A means 170 is mounted.
Of the means constituting the mixture generation system, all of the means other than the concrete transport means may be mounted on the same mobile trolley 200, or of the means constituting the mixture generation system other than the concrete transport means. Some of them may be mounted on the same mobile carriage 200 .

The liquid storage means is not limited to the liquid storage means 31 shown in FIGS. 1 and 5 as long as it can store liquid.
The power supply means 170 may be a generator or a battery as long as it can supply power for driving the control means 50 .

The above description is merely an example, and the present invention is not limited to the above embodiments.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these.

(Evaluation 1)
In order to confirm the quantification when powder and water are automatically transported to the slurry production apparatus using the mixture generation system 1 of one embodiment of the present invention shown in FIG. 1, the powder and water actually transported was measured. The supply of the powder was controlled by detecting the mass of the powder supplied to the slurry production apparatus with a load cell. Moreover, the supply of water was controlled by detecting the mass of the water supplied to the slurry production apparatus with a load cell. Powders 1 to 8 described below were used as powders, and normal tap water was used as water. Each measurement was performed three times, the standard deviation was determined, and the variation range was determined in percentage by dividing it by the average of the three measurements. Table 1 shows the results. As a means for producing the slurry, a grout mixer "OKZ-30" (model number) manufactured by Okasan Kiko Co., Ltd. was used.

<Materials used>
(1) Powders 1-8
Powder 1: calcium hydroxide, commercial product, 300 μm residue less than 1%, 100 μm residue 5%
Powder 2: Calcium carbonate, commercial product, Blaine specific surface area 4,000 cm ² /g
Powder 3: Alumina cement No. 1 mainly composed of a calcium aluminate compound, CaO.Al ₂ O ₃ . Blaine specific surface area 5,000 cm ² /g
Powder 4: Expansive material for concrete produced by heat-treating a compound containing calcium sulfoaluminate compound, CaO raw material and _CaSO4 raw material, commercially available product, Blaine specific surface area 3,600 cm ² /g
Powder 5: 3CaO·SiO _{2 synthesized from a calcium silicate compound, reagent grade 1 calcium carbonate and SiO 2 .} Blaine specific surface area 3,000 cm ² /g
Powder 6: Portland cement, commercial product Powder 7: Calcium sulfoaluminate cement, commercial product, Blaine specific surface area 4,500 cm ² /g
Powder 8: blast furnace slag, commercial product

<Admixture supply device>
Inner diameter of casing: 250mm
Casing length: 2000mm
Pitch number of spiral blades on the powder supply screw shaft: 10
Inverter frequency of variable speed drive motor: 60Hz

From Table 1, when the mixture generation system 1 of one embodiment of the present invention is used, the fluctuation range of the weighed value of the powder and liquid supplied to the slurry production apparatus is 2% by mass or less, preferably 1% by mass. 3% by mass or less, preferably 2% by mass in terms of powder, indicating that quantification can be ensured.

(Evaluation 2)
By changing the time (stirring time) from supplying powder and liquid to completing 20 liters of slurry using the mixture generation system 1 of one embodiment of the present invention, slurry is manufactured in a batch type and manufactured The slurry property was confirmed. The water/powder ratio was 50%, and the stirring times were 30 seconds, 60 seconds, 90 seconds and 120 seconds. By passing the stirred slurry through a 5 mm sieve, it was confirmed whether or not lumps of powder that had not been completely dispersed existed in the slurry. Table 2 shows the results. As a means for producing the slurry, a grout mixer "OKZ-30" (model number) manufactured by Okasan Kiko Co., Ltd. was used.

From Table 2, it was found that by using the slurry addition system of the present invention, a lump-free slurry can be produced within 120 seconds regardless of the material used.

(Evaluation 3)
Slurry was produced in batch mode using the mixture production system 1 of one embodiment of the present invention, and the time required from supplying powder to the slurry production apparatus to supplying slurry to the agitator wheel was measured. Powders 1 and 3 were used as the powders, tap water was used as the liquid, and the slurry was prepared with a water-to-powder ratio of 50% and stirring for 120 seconds. The pumping distance was 10 m. Table 3 shows the results. As a means for producing the slurry, a grout mixer "OKZ-30" (model number) manufactured by Okasan Kiko Co., Ltd. was used.

From Table 3, by using the mixture generation system 1 of one embodiment of the present invention, even if any powder is used, the slurry is supplied to the agitator wheel within 5 minutes after supplying the powder to the slurry production apparatus. found to be available.

(Evaluation 4)
Ordinary concrete with a cement of 288 kg/m ³ , a water/binder ratio of 55.0%, and an air content of 4.5 ± 1.5% by volume was prepared at a ready-mixed concrete factory, and 2 m ³ or 4 m was added to an agitator vehicle with a capacity of 5 m ^{3 3} loaded and transported for 30 minutes. After that, using the mixture generating system 1 of one embodiment of the present invention, the expanding material of the powder 4 is mixed with water for 90 seconds so that the water powder ratio is 55% to form a slurry, and the amount of the expanding material added is 20 kg / Slurry was supplied to the agitator wheel so that it became ^m3 . After supplying the slurry, the mixer drum of the agitator car was rotated at high speed for 2 minutes, after which the concrete was discharged. From the concrete in the middle of discharge, sampling was performed three times immediately after the start of discharge, at the time of discharging half of the concrete load, and at the end of discharging, and a concrete specimen was prepared. Compressive strength (in accordance with JIS A 1108) and length change rate (in accordance with JIS A 6202) were measured for this concrete specimen. Further, the surface condition of the hardened concrete was checked to confirm whether the expansive agent of the powder 4 was uniformly dispersed in the concrete only by agitating the mixer drum of the agitator wheel. In this test, for comparison, a test was also conducted in the case where the expansive material of the powder 4 was added to the agitator wheel so as to be 20 kg/m ³ as it was. The concrete before the addition of the expansive agent was blended so as to have the same water binder as in the case of adding the slurry, and the mixing method after the addition of the expansive agent was the same as in the case of adding the slurry. Table 4 shows the concrete mix for this test. In addition, Table 5 shows the results. As a means for producing the slurry, a grout mixer "OKZ-30" (model number) manufactured by Okasan Kiko Co., Ltd. was used.

From Table 5, it was found that according to the mixture generating system 1 of one embodiment of the present invention, the powdered admixture material can be uniformly mixed with concrete only by rotating the drum of the agitator wheel. As a result, according to the mixture generation system 1 of one embodiment of the present invention, it was found that the powdery admixture can be efficiently mixed with the ready-mixed concrete transported to the construction site by the agitator vehicle. . Furthermore, according to the mixture generation system 1 of one embodiment of the present invention, high fluidity concrete, grout (mortar concrete), high strength / ultra high strength concrete, high durability concrete, seawater resistant concrete, acid resistant concrete, It has been found that special concrete can be easily produced by compounding admixtures such as wear-resistant concrete, underwater inseparable concrete, mass concrete, reverse-cast concrete, shotcrete, and porous concrete.
On the other hand, when the powder was directly supplied to the agitator wheel without using the mixture generating system 1 of one embodiment of the present invention, it was confirmed that the powder was not sufficiently dispersed in the concrete and was unevenly distributed. rice field. As a result, it was found that when the powdery admixture was directly supplied to the agitator wheel, the powdery admixture could not be uniformly mixed with the concrete only by rotating the drum of the agitator wheel. If such concrete is used, it is thought that partial/local defects will occur.

1 mixture generation system 2 powdered admixture 3 liquid 4 admixture slurry 5 retarder water 10 slurry production means (slurry production apparatus)
10C Mortar continuous kneading device 11 Stirring tank 11C Powder supply unit 12 Rotating shaft 12C Slurry kneading unit 13 Driving device 14 Stirring blade 15 Belt 16 Discharge port 17 Discharge port cover 18 Discharge chute 20 Mixed material supply means (mixed material supply device)
23 Casing 24 Powder supply screw shaft 24a Spiral blade 26 Variable speed drive motor 28 Hopper 30 Liquid supply means (submersible pump)
31 liquid storage means 40 weighing means (load cell)
50 setting means, control means (control device)
51 setting means (control panel)
60 Pressure-feeding means (pressure-feeding pump)
61 Pressure feed hose 70 Concrete transport means (agitator car)
71 storage and stirring mechanism (mixer drum)
113C Casing 114C Powder supply screw shaft 114Ca Spiral blade 114Cb Stirring plate 115C Hollow cylindrical tube 116C Variable speed drive motor 118C Powder hopper 121 Stirring blade side pulley 122C Swing shaft 123C Casing 124C Slurry kneading shaft 124Ca Inclined plate 124Cb Kneading plate 126C Possible Variable-speed drive motor 131 Drive side pulley 141 Central portion 142 Stirring blade 143 Material passage portion 144 Auxiliary blade portion 150 Retardant water storage means (retardant water storage tank)
160 Retardant water pressure feed means 161 Retardant water pressure feed hose 162 Retardant water sprayer 170 Electric power supply means 200 Moving cart

Claims (9)

Slurry manufacturing means for manufacturing an admixture slurry at a construction site from a powdered admixture and a liquid;
admixture supply means for supplying the admixture to the slurry production means;
a liquid supply means for supplying the liquid to the slurry production means;
a measuring means for measuring the supply amount of the admixture and the supply amount of the liquid supplied to the slurry production means;
setting means for setting the supply amount of the admixture and the supply amount of the liquid to be supplied to the slurry production means;
The supply amount of the admixture supplied by the admixture supply means so that the supply amount of the admixture and the supply amount of the liquid to the slurry production means become the set supply amounts set by the setting means. and control means for controlling the supply amount of the liquid supplied by the liquid supply means;
a pumping means for supplying the admixture slurry produced by the slurry producing means to a pressure-feeding hose;
Having a concrete conveying means having a storage and agitating mechanism for storing and agitating concrete,
The fluctuation range of the supply amount of the admixture controlled to the set supply amount by the control means is 3% by mass or less, and the supply amount of the liquid controlled to the set supply amount by the control means. is 2% by mass or less, and the admixture slurry is directly supplied to the storage and stirring mechanism from the pressure feed hose, to obtain a mixture of the concrete and the admixture slurry. Mixture generation system. 2. The mixture generation system according to claim 1, wherein the time from supplying the admixture and the liquid to completing the admixture slurry is within 120 seconds. 3. The mixture production system according to claim 1, wherein the time from supplying the admixture to the slurry production means to supplying the admixture slurry to the storage/stirring mechanism is within 7 minutes. a retarder water storage means for storing retarder water;
further comprising retarder water pumping means for supplying retarder water to the retarder water pumping hose;
After the mixture is discharged from the concrete conveying means, the retarder water is supplied to the storage and stirring mechanism through the retarder water pressure-feeding hose using the retarder water pressure-feeding means,
The mixture generation system according to any one of claims 1 to 3, wherein the storage/agitation mechanism is washed with the retarder water. liquid storage means for storing the liquid;
further comprising power supply means for supplying power for driving the control means;
5. The mixture production system according to any one of claims 1 to 4, wherein the means other than the concrete transport means are mounted on the same mobile carriage. The mixture production system according to any one of claims 1 to 5, wherein the concrete conveying means is an agitator car. The admixture supply means includes a powder supply screw shaft that is rotationally driven around an axis and supplies the admixture in the axial direction, and a variable speed drive motor that rotationally drives the powder supply screw shaft in a variable speed manner. 7. The mixture generating system according to any one of claims 1 to 6, which has a rotation speed and adjusts the supply amount of the admixture. The slurry manufacturing means includes a stirring tank, a rotating shaft provided at the bottom of the stirring tank and extending vertically in the stirring tank, and a stirring blade attached to the rotating shaft,
The stirring blade has a central portion connected to the rotating shaft and a plurality of stirring blades extending radially outward from the central portion,
The stirring blade extends radially outward from the periphery of the central portion,
The front end of the stirring blade is obliquely provided so that it is higher than the rear end,
A material passage part is formed by providing the stirring blades with a gap between the adjacent stirring blades,
An auxiliary blade part is fixed to the tip side in the radial direction of the stirring blade,
The auxiliary blade part has an annular shape or a flat plate shape obtained by dividing the annular shape, and is provided outside the material passing part in the inner and outer directions of the rotation diameter, and the agitating blade. 8. The mixture generating system according to any one of claims 1 to 7, comprising a portion located radially outside of the radial tip. The admixture is a group consisting of fly ash, ground granulated blast furnace slag, silica fume, expansive material, rapid hardening material, rapid setting material, high strength admixture, fine limestone powder, crushed stone powder, sludge powder, and fine powder of sewage sludge. The mixture generating system according to any one of claims 1 to 8, wherein at least one admixture selected from

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