JP2015061752A - Concrete manufacturing method and concrete manufacturing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of manufacturing a concrete even in a location where a work space is insufficient such as a tunnel or in a strong wind environment.SOLUTION: A self-traveling mobile vehicle used for manufacturing a concrete, includes: a storage vessel for storing non-liquid concrete constituent materials with being separated in types; a hopper 11; a mixer 12; a conveyor arm 13 for conveying the hopper 11 up to a non-liquid-concrete-constituent-material inlet port of the mixer 12; and a transport mechanism for weighing liquid concrete constituent materials and transporting the liquid concrete constituent materials into the mixer 12. The non-liquid concrete constituent materials of specified quantities within the storage vessel are put into the hopper 11, the conveyor arm 13 conveys the hopper 11 up to the inlet port of the mixer 12 to put the non-liquid concrete constituent materials into the mixer 12. The liquid concrete constituent materials weighed by the weighing meter are injected into the mixer 12. The mixer operates to manufacture a concrete.

Description

  The present invention relates to concrete manufacturing technology. In particular, the present invention relates to a concrete manufacturing technique in a place where the construction site is remote from the ready-mix factory or where the work space is restricted.

  Fresh concrete (fresh concrete) used in construction work, civil engineering work, etc. is generally manufactured from raw material blending to water injection and kneading at an existing ready-mixed concrete factory. However, when the construction site is located in a remote place away from the ready-mix factory, the fresh concrete may change in properties (deterioration) during long-distance transportation from the ready-mix factory to the site by a concrete mixer truck. That is, the stability of the quality of concrete is impaired by the transportation time. In particular, the risk of quality degradation is high in a high temperature environment. For concrete (mortar), for example, high-strength concrete, fast-hardening concrete, high-strength concrete, lightweight concrete, fiber reinforced concrete, underwater non-separable concrete, polymer cement mortar, non-shrink grout material, etc. The change with time is particularly large.

  In order to solve the above problems, “a concrete aggregate storage bag having an opening at the top and a discharge opening at the center of the bottom, and an opening / closing that can open and close the discharge opening of the concrete aggregate storage bag” Means, a suspension rope attached to the concrete aggregate storage bag so that the concrete aggregate storage bag can be lifted with the outlet of the concrete aggregate storage bag positioned below, and a place stored in the concrete aggregate storage bag A fixed amount of concrete aggregate, a cement storage bag in which a lower portion opened in the concrete aggregate storage bag storing the concrete aggregate is closed by folding or overlapping, and stored in the cement storage bag A predetermined amount of cement and a cement attached to the upper part of the cement storage bag so as to be lifted almost simultaneously with the suspension rope in use. A concrete raw material comprising a bag hanging rope. ”“ Concrete aggregate storage bag having an opening at the top and a discharge port at the bottom center, and a drainage of the concrete aggregate storage bag. Opening and closing means capable of opening and closing the outlet, a suspension rope attached to the concrete aggregate storage bag so as to be lifted with the discharge port of the concrete aggregate storage bag positioned below, and the concrete bone A cement storage bag for storing a predetermined amount of cement which is closed by folding or overlapping the upper part of the concrete aggregate in which a predetermined amount of concrete aggregate is stored in the material storage bag, and the cement storage A cement storage bag suspension rope attached to the top of the bag so that it can be lifted almost simultaneously with the suspension rope in use. Concrete material transport bag. "Has been proposed (Japanese Patent No. 4221387).

  “A container back body that houses a concrete aggregate in which an opening that can be closed with a rope is formed at the top, and a small-diameter discharge tube that can be folded at the center of the bottom is formed; A suspension rope attached to the container back main body so as to be lifted in a state where it is positioned at the lower portion, a cover piece that covers the bottom surface of the container back main body so as to be folded so as to close the discharge tube, and this cover A plurality of opening / closing covers provided around the discharge tube of the container back body so as to cover the piece, and the container back body attached to the front end portions of the plurality of opening / closing covers so as to be slidable in a ring shape An open / close rope that can be locked at the upper position of the open / close rope, and the open / close rope that is slidably attached to the open / close rope. The closed cover can be positioned in the open / closed state, and when the open / close cover is closed, the rear end has a length that can be positioned on the outer peripheral part of the container back body side, and the open / close rope protrudes outward And a flexible lock cylinder formed with an opening / closing rope guide hole that can be guided so as to prevent sliding movement of the opening / closing rope by the elastic force of the flexible lock cylinder itself. "Container bag." "Container bag body that contains concrete aggregate with an opening that can be closed with a rope at the top and a small-sized discharge tube that can be folded at the center of the bottom. A suspension rope attached to the container back body so that the discharge tube can be lifted with the discharge tube positioned at the bottom, and the container back A cover piece that covers the bottom of the body in a state of being folded so as to close the discharge cylinder, a plurality of opening / closing covers provided around the discharge cylinder of the container back body so as to cover the cover piece, An open / close rope attached to the tip of the open / close cover in a ring shape so as to be slidable and lockable to an upper position of the container back body, and the plurality of open / close covers attached to the open / close rope so as to be slidable When the open / close cover is closed, the rear end has a length that can be positioned on the outer periphery of the side surface of the container back body, and the open / close rope protrudes outward. A flexible lock cylinder formed with an opening and closing rope guide hole that can be guided to the front and a plurality of opening and closing covers on the opposite side of the portion where the lock cylinder is located An open rope that can be pulled in a direction in which a plurality of open / close covers are opened from the outer portion of the container back body attached to the open / close rope portion, and the elastic force of the flexible lock cylinder itself A container bag characterized in that sliding movement of the open / close rope is prevented. Is proposed (Japanese Patent No. 5188750).

Japanese Patent No. 4221387 Japanese Patent No. 5188750

  In the proposed technique, since the concrete raw material in the bag is put into the mixer, the bag needs to be lifted to a position higher than the mixer inlet. That is, the bag in which the concrete raw material is stored is elevated and lifted by a crane truck or a crane of a UNIC truck. However, the work by the crane truck or the unic truck needs to have a wide and high work space. However, there are often many cases where there is a great restriction on the space for placing concrete due to the inside of the tunnel or other geographical conditions. Furthermore, when the bag is lifted high by a crane, there is a safety problem in a strong wind environment.

  Therefore, the problem to be solved by the present invention is to solve the above problems. For example, it is to provide a technique capable of producing concrete even in a place where there is not enough work space such as in a tunnel or in a strong wind environment. It is to provide a technique capable of producing stable quality concrete even when the construction site is a remote place away from the ready-mix factory or in a high temperature environment.

The present invention
A method for producing concrete using a liquid concrete constituent material and a non-liquid concrete constituent material having at least cement and aggregate,
For the concrete production,
A specified amount of the non-liquid concrete constituent material is separated into constituent material types, and a storage container stored therein,
A hopper, a mixer, a transport arm for transporting the hopper to the inlet of the non-liquid concrete constituent material of the mixer, and a liquid concrete constituent material measured by a measuring instrument for measuring the liquid concrete constituent material And a self-propelled mobile vehicle equipped with a transport mechanism for transporting the fuel into the mixer,
The in-hopper loading step in which the storage container is lifted on the hopper, the closing portion of the storage container is opened, and a specified amount of the non-liquid concrete constituent material in the storage container is charged into the hopper;
After the hopper loading process, the hopper is transported to the mixer inlet by the transport arm of the self-propelled mobile vehicle; and
After the conveying step, the non-liquid concrete constituent material in the hopper is thrown into the mixer of the self-propelled mobile vehicle, and the non-liquid concrete constituent material in-mixing step,
Liquid-based concrete constituent material metered in the liquid-based concrete constituent material mixer in which the liquid-based concrete constituent material measured by the measuring instrument is charged into the mixer of the self-propelled mobile vehicle;
A concrete manufacturing method comprising: a concrete manufacturing process in which the mixer operates and concrete is manufactured is proposed.

The present invention proposes a method for producing concrete, wherein a non-liquid admixture (and / or admixture) is further used for the non-liquid concrete constituent material.
The present invention proposes a method for producing concrete, wherein a liquid admixture (and / or admixture) is used as the liquid concrete constituent material.

The present invention
The concrete manufacturing method,
A hanging tool used when moving the storage container on the hopper is provided,
The storage container suspended on the hopper is opened in a closed portion provided on the bottom side thereof so that the non-liquid concrete constituent material in the storage container is sequentially or simultaneously for each configuration type. The present invention proposes a concrete manufacturing method characterized by being configured to be discharged downward.

The present invention
A system in which a concrete is manufactured using a liquid concrete constituent material and a non-liquid concrete constituent material containing at least cement and aggregate,
The system comprises a storage container and a self-propelled mobile vehicle,
The storage container is
A specified amount of the non-liquid concrete constituent material is a container that is separated into constituent material types and stored.
The self-propelled mobile vehicle is
A hopper,
A mixer,
A transport arm for transporting the hopper to the inlet of the non-liquid concrete constituent material of the mixer;
A measuring instrument for measuring the liquid concrete constituent material;
The present invention proposes a concrete manufacturing system comprising a transport mechanism for transporting the liquid concrete constituent material weighed by the meter into the mixer.

The present invention proposes a concrete manufacturing system, wherein the non-liquid concrete constituent material further includes a non-liquid admixture (and / or admixture).
The present invention proposes the concrete manufacturing system, wherein a liquid-based admixture (and / or admixture) is used as the liquid-based concrete constituent material.

The present invention
The concrete manufacturing system,
When the storage container is opened at its bottom side, the non-liquid concrete constituent material in the storage container is discharged downward in order or at the same time for each configuration type. The concrete manufacturing system characterized by being comprised is proposed.

  The present invention proposes the concrete production system used in the concrete production method.

  Even if the construction site is a remote place away from the ready-mix factory, or in a high temperature environment, stable quality concrete can be provided.

  Stable quality concrete can be safely provided even in places where there is no work space, such as in tunnels, or even in strong wind environments.

  An amount of concrete suitable for the construction scale, for example, a small site, can be easily provided without waste.

  Concrete can be provided without the need for heavy machinery such as cranes and unics.

  Work with a small number of people is possible, contributing to labor saving.

Illustration of storage container Illustration of a self-propelled mobile vehicle in the hopper grounding state Explanatory drawing of self-propelled mobile vehicle during hopper transfer

  The first invention is a concrete manufacturing method. The embodiment will be described below. The method is a method in which a concrete is manufactured by using a liquid concrete constituent material and a non-liquid concrete constituent material. The liquid concrete constituent material is, for example, water. Other liquid materials are used as needed. For example, a liquid type admixture (and / or admixture). The non-liquid concrete constituent material is, for example, aggregate and cement. Other non-liquid materials are used as needed. For example, non-liquid type admixtures (and / or admixtures). A storage container and a self-propelled mobile vehicle are used for the concrete production. The storage container is a container in which a predetermined amount of the non-liquid concrete constituent material is separated into constituent material types and stored. The self-propelled mobile vehicle includes a hopper. The self-propelled mobile vehicle includes a mixer. The self-propelled mobile vehicle includes a transfer arm. The transfer arm is, for example, an arm that transfers the hopper placed on the ground (in a grounded state) to the inlet of the non-liquid concrete constituent material of the mixer. The self-propelled mobile vehicle includes a transport mechanism. The transport mechanism is a mechanism for transporting the liquid concrete constituent material measured by a measuring instrument for measuring the liquid concrete constituent material into the mixer. The method includes a hopper charging step. In the hopper charging step, for example, the storage container is lifted on a hopper placed on the ground, the closure part of the storage container is opened, and a specified amount of the non-liquid concrete constituent material in the storage container is placed. A step of feeding into the hopper. The method includes a conveying step. The transport step is a step in which the hopper placed on the ground is transported to the input port of the mixer by the transport arm of the self-propelled mobile vehicle after the in-hopper input step. The method comprises a non-liquid concrete constituent material mixer charging step. The non-liquid concrete constituent material in-mixing step is a step in which the non-liquid concrete constituent material in the hopper is put into the mixer of the self-propelled mobile vehicle after the transporting step. The method includes a charging step in a liquid concrete constituent material mixer. The charging step in the liquid concrete constituent material mixer is a step in which the liquid concrete constituent material measured by the measuring instrument is put into the mixer of the self-propelled mobile vehicle. The charging step in the non-liquid concrete constituent material mixer and the charging step in the liquid concrete constituent material mixer may be performed at the same time, or whichever is first. For example, after the non-liquid concrete constituent material mixer charging step, the liquid concrete constituent material mixer charging step is performed. After charging into the mixer, the mixer operates to produce concrete.

  The storage container preferably includes a hanging tool. The storage container is lifted up by, for example, a hopper placed on the ground. The storage container preferably includes an opening / closing part on the bottom side thereof. Then, the storage container suspended on the hopper is opened by a closing portion provided on the bottom side thereof, so that the non-liquid concrete constituent material in the storage container is sequentially in each configuration type, Or at the same time, it is configured to be discharged downward.

  The second invention is a concrete manufacturing system. The embodiment will be described below. The system is a system in which concrete is manufactured by using a liquid concrete constituent material and a non-liquid concrete constituent material. The liquid concrete constituent material is, for example, water. Other liquid materials are used as needed. For example, a liquid type admixture (and / or admixture). The non-liquid concrete constituent material is, for example, aggregate and cement. Other non-liquid materials are used as needed. For example, non-liquid type admixtures (and / or admixtures). The system is preferably a system used for the concrete manufacturing method, for example. The system includes a storage container and a self-propelled mobile vehicle. The storage container is a container in which a predetermined amount of the non-liquid concrete constituent material is separated into constituent material types and stored. The self-propelled mobile vehicle includes a hopper. The self-propelled mobile vehicle includes a mixer. The self-propelled mobile vehicle includes a transfer arm. The transfer arm is, for example, an arm that transfers the hopper placed on the ground (in a grounded state) to the inlet of the non-liquid concrete constituent material of the mixer. The self-propelled mobile vehicle includes a measuring instrument. The meter measures the liquid concrete constituent material. The self-propelled mobile vehicle includes a transport mechanism. The transport mechanism is a mechanism for transporting the liquid concrete constituent material measured by the measuring instrument into the mixer.

  The storage container preferably includes a hanging tool. The storage container is lifted up by, for example, a hopper placed on the ground. The storage container preferably includes an opening / closing part on the bottom side thereof. Then, the storage container suspended on the hopper is opened by a closing portion provided on the bottom side thereof, so that the non-liquid concrete constituent material in the storage container is sequentially in each configuration type, Or at the same time, it is configured to be discharged downward.

  Further detailed description will be given below.

  The storage container is, for example, a bag (packaging bag). The bag has a storage mechanism that can be stored separately for each component material type. A discharge mechanism for dropping all the stored items is provided. A pre-weighed non-liquid concrete component is placed in the bag. In particular, aggregate and cement are put separately. When other non-liquid concrete constituent materials are put, they are also put separately if necessary. In the present invention, the cement and the aggregate are separated and stored in order to prevent an adverse effect on the cement due to moisture adhering (contained) to the aggregate. When a non-liquid concrete constituent material that does not adversely affect the cement is used, the non-liquid concrete constituent material may be put together with the cement. When it is unclear whether or not it will affect, it is preferable to separate and store as much as possible. When the aggregate is separated and stored in the bag, the contained (adhered) moisture of the aggregate is difficult to disappear (dry). Therefore, it helps to prevent the quality of the aggregate from deteriorating. When the cement is separately stored in the bag, the cement and the moisture (humidity) in the air hardly bond. Therefore, it is also useful for preventing deterioration of the cement quality. Thus, since each component of the non-liquid concrete constituent material is separated and stored in the bag, the quality of the component is prevented from deteriorating.

  The storage container (bag: packing bag) has, for example, the following structure. The lower side of the bag (outer bag) is bound with, for example, a string. Therefore, when the string is released, the substance (for example, aggregate) in the bag (outer bag) falls downward. The closing means on the lower side of the bag (outer bag) is not limited to the string. An appropriate method is adopted. The bag (outer bag) has an inner bag therein. The inner bag is connected to the outer bag. Therefore, even if the string is released and the substance in the outer bag falls, the inner bag itself does not fall. Of course, the fall of the substance in the inner bag is not hindered. The inner bag is present on top of the outer bag. A prescribed amount (measured prescribed amount) of aggregate is stored inside the outer bag (particularly, the inside on the lower side). The inner bag is placed in contact with the upper part of the aggregate stored in the outer bag. For example, cement is accommodated in the inner bag. The inner bag is open on the lower side. Even if it is tied with a string, it can be easily unwound when some force is applied. Accordingly, the internal material (eg, cement) falls from the opened opening. The lower side opening is folded in two. Therefore, even if the inner bag is placed on the aggregate even if it is not tied with a string, the substance (for example, cement) in the inner bag and the substance (for example, aggregate) outside the inner bag Is separated and blocked. Therefore, the aggregate-containing (attached) moisture outside the inner bag is unlikely to adversely affect the cement in the inner bag. When the string that binds the lower part of the outer bag is released, first, the aggregate existing in the lower part in the outer bag falls. After some time, the cement in the inner bag begins to fall. In the above, cement is stored in the inner bag. However, cement may be stored in the lower part of the outer bag, and aggregate may be stored in the inner bag. In this case, the aggregate starts to fall after the cement falls.

  In the above, the inner bag was an example. However, there may be two or more inner bags. An inner bag is provided according to the number of components of the non-liquid concrete constituent material. When the number of inner bags is N (N is an integer of 2 or more), a structure in which the Nth inner bag exists in the (N-1) th inner bag is conceivable. Alternatively, there may be a case where N inner bags are equally present in the outer bag. Any form may be sufficient.

  In the above, it was a double-structure bag having an inner bag in the outer bag. However, a form in which a partition member is provided inside the bag may be used. In this case, when the string that binds the bag lower part is released, all the stored items fall at once. For example, cement and aggregate fall simultaneously. In the case of simultaneous dropping, it can be said that the mixing efficiency of cement and aggregate is higher than the case of falling sequentially.

  The storage container (bag: packing bag) may have the elements disclosed in Patent Documents 1 and 2.

  The self-propelled mobile vehicle includes a hopper, a mixer, a transfer arm, a measuring instrument, and a transport mechanism. A conventional concrete agitator vehicle does not include at least the hopper and the transfer arm.

  When the lower part of the bag conveyed (lifted) on the hopper is opened, the non-liquid concrete constituent material in the bag falls. The hopper receives the falling non-liquid concrete constituent material. The hopper is in contact with the ground. The height for lifting the bag is low. Therefore, the workability of supplying the non-liquid concrete constituent material into the hopper is good.

  After the non-liquid concrete constituent material is put in the hopper placed on the ground (grounding), the transfer arm is operated. In other words, the transport arm transports the hopper from the ground contact position to the mixer position. As a result, the non-liquid concrete constituent material in the hopper can be put into the mixer. Thereafter, the lid (opening / closing plate) of the hopper is opened, and the non-liquid concrete constituent material in the hopper is introduced into the mixer from the mixer inlet.

  By the way, water with a predetermined water-cement ratio is measured by the meter with respect to the input cement amount. This measured water is fed into the mixer via a transport path by the power of a pump. When a liquid concrete constituent material other than water is used, it is measured by the measuring instrument. And this measured liquid is thrown in into the said mixer via the conveyance path with the force of a pump. Since the liquid-based concrete constituent material may be evaporated, the measurement is preferably performed immediately before the kneading operation by the mixer.

  The present invention uses a storage container (bag) and a self-propelled mobile vehicle. The self-propelled mobile vehicle has not been proposed so far. Even if only the self-propelled mobile vehicle is used, a certain amount of labor can be saved. However, labor saving is remarkable when both are used together. For example, the measurement accuracy of cement and aggregate is high. And it does not take time to measure cement and aggregate on site. Furthermore, high quality concrete can be obtained.

  The self-propelled mobile vehicle is a mixer provided with a vehicle structure equipped with a driving device such as an engine. It has a mixture inlet and a mixture outlet. The mixing mechanism of the self-propelled mobile vehicle may be any as long as it is suitable for concrete kneading. As a preferred example, a spiral shear blade is provided on the inner wall of the mixer, and a mechanism that enables kneading and discharging of concrete by rotation of the drum is provided. At the time of discharging, a mechanism that rotates in the reverse direction to that at the time of kneading and can be discharged from the same place as the charging port may be attached. In such a case, it is not necessary to separately provide a discharge port and a discharge path for discharging in the mixer. The mixer can be downsized and the operation can be simplified. This is preferable because it enables labor saving and use in a relatively small space. Since it is not necessary to separately provide a discharge port and a discharge path for discharging in the mixer, the concrete moving path is shortened. The cement paste component adhering to the path is reduced. And it leads to suppression of quality fluctuation.

  The self-propelled mobile vehicle is preferably equipped with equipment for unloading and placing the concrete that has been kneaded. Any unloading equipment can be used. It is desirable to have a chute in that the path is short and quality fluctuations due to adhesion of cement paste components can be suppressed.

  The concrete may be concrete in a broad sense. This corresponds to a hydraulic composition containing at least aggregate and cement. Depending on the size of the aggregate, what is called mortar is also included. Special concrete / special mortar such as early-strength concrete, fast-hardening concrete, high-strength concrete, lightweight concrete, fiber reinforced concrete, underwater non-separable concrete, polymer cement mortar, non-shrink grout material, etc. has a great effect. These special concrete / special mortars are sensitive to even small fluctuation factors, the quality often changes over time, the number of materials is more than usual, and labor saving is an issue. In the case of any of these concretes, the present invention is particularly effective. Preferably, special hardened admixtures (agents), underwater separation preventing admixtures (agents), expansion agents (agents), AE water reducing agents, high performance water reducing agents, shrinkage reducing agents, polymer dispersions, etc. The present invention is particularly useful in concrete / special mortar.

  The present invention can be applied to any concrete. As the cement, any cement such as early strength, normal, low heat, moderate heat, portland cement such as sulfate-resistant salt, mixed cement and the like is used. Aggregates are not particularly limited in characteristics such as material, shape and size. For example, river sand, river gravel, sea sand, crushed stone, crushed sand, recycled aggregate, lightweight aggregate, slag aggregate, etc. are used as appropriate. The water used at the time of kneading is not particularly limited. For example, any water such as tap water, river water, and ground water is appropriately used. Concrete may contain admixture components and admixture components other than those described above. As such components, thickeners, dispersants, shrinkage reducing agents, antifoaming agents, AE agents, expanding materials, fibers, pigments, water retention agents, pozzolanic reactive substances, blast furnace slag fine powder, silica stone powder, limestone fine powder , Alumina powder, fast-hardening material, accelerator, retarder and the like.

  Specific examples will be given below. However, the present invention is not limited only to the following examples. Various modifications and application examples are also included in the present invention as long as the features of the present invention are not greatly impaired.

  The following bags and self-propelled mobile mixers were used.

[Non-liquid concrete component storage container (bag: packing bag): see Fig. 1]
The bag has a structure in which aggregates and components other than aggregates (such as cement and cement admixture) can be stored separately. For example, the inner bag 2 is provided in the upper part of the outer bag 1. The lower part of the outer bag 1 is tied by a string 3. When the string 3 is unwound, the lower part of the outer bag 1 becomes an opening. Therefore, the substance in the outer bag 1 falls from this opening. The lower part of the inner bag 2 is an opening. However, the lower part of the inner bag 2 is folded in a state where the substance is put in the inner bag 2. Thereby, the lower part of the inner bag 2 is in a closed state. The inner bag 2 filled with, for example, cement 4 is placed on a substance (for example, a predetermined amount of aggregate) 5 filled in the lower portion of the outer bag 1. Further, in some cases, an admixture (material) is also put in the same bag together with the cement. Even if the lower part of the inner bag 2 is folded twice, the substance 4 of the inner bag 2 does not fall unless the substance 5 falls. This is also obvious from FIG. The bag was filled with the substance as follows. After the lower part of the outer bag 1 was tied with the string 3, a prescribed amount of substance (for example, aggregate) 5 was first introduced from the upper opening of the outer bag 1. After this, the inner bag 2 was placed on the substance 5. Thereafter, a specified amount of substance (for example, cement) 4 was put into the inner bag 2. Furthermore, a non-liquid admixture (material) was put into the same inner bag as the cement. Thereafter, the upper part of the outer bag and the inner bag was tied together with the string 6. The outer bag 1 is provided with a lifting device 7 for lifting. A hook or the like is hung on the hanger 7 to lift the bag.

[Self-propelled mobile mixer truck: See Figs. 2 and 3]
The self-propelled mobile mixer truck includes a hopper 11, a mixer 12, a transfer arm 13, a measuring instrument (not shown), a pump (not shown), and a transport path (not shown). . The transfer arm 13 moves the hopper 11 up and down. When the non-liquid concrete constituent material is put into the hopper 11, the lowermost end portion of the hopper 11 is grounded (see FIG. 2). Note that the ground may not be present. The hopper 11 may be slightly lifted by the transfer arm 13 in the initial (initial) state. That is, the transfer arm 13 is not operated. After the non-liquid concrete constituent material is put into the hopper 11, the transfer arm 13 is operated. The operation of the transport arm 13 causes the hopper 11 to move (rise) to the mixer 12 position. After moving to the mixer 12 position, the open / close lid of the hopper 11 is opened. As a result, the non-liquid concrete constituent material (cement and aggregate, and in some cases, further admixture (agent)) in the hopper 11 is put into the mixer 12 (see FIG. 3). Thereafter, the required amount of water is measured by the measuring instrument. This measured water is put into the mixer 12 through the transport path by the power of the pump. In some cases, the liquid-based admixture (agent) measured by the measuring instrument is put into the mixer 12. After this, the mixer is activated. That is, kneading is performed by a spiral shear blade existing on the inner wall. This produces concrete. After concrete production, fresh concrete is discharged from the mixer. The concrete discharging mechanism is a concrete discharging mechanism of a conventional mixer truck.

[Concrete materials]
(1) Cement: Ordinary Portland cement (manufactured by Taiheiyo Cement Co., Ltd.) (C)
(2) Fine aggregate: Land sand from Hamaoka, Ogasa-gun, Saitama (S)
(3) Coarse Aggregate; Crushed stone from Gyogami, Chichibu-gun, Saitama Prefecture (G)
(4) Water; tap water (W)
(5) Admixture Non-liquid type admixture
Ad-1: Fast-curing admixture (trade name “Facet”, manufactured by Taiheiyo Materials Co., Ltd.
Ad-2: Admixture for preventing underwater separation (manufactured by Taiheiyo Materials Co., Ltd., trade name "Pacific Elcon")
Ad-3: Expandable material (trade name “Hyper Expan K” manufactured by Taiheiyo Materials Co., Ltd.)
Liquid admixture
Ad-4: Lignin sulfonic acid-based AE water reducing agent (trade name “Master Pozzolith No. 70” manufactured by BASF Japan Ltd.)
Ad-5: Melamine sulfonic acid-based high-performance water reducing agent (trade name “LC-1000” manufactured by Taiheiyo Materials Co., Ltd.)
Ad-6: Polycarboxylic acid AE water reducing agent (BASF Japan, trade name “Master Polyhed 15S”)
Ad-7: Shrinkage reducing agent (trade name “SR-1000”, manufactured by Kao Corporation)
Ad-8: Polymer dispersion (manufactured by Taiheiyo Materials Co., Ltd., trade name “Pacific CX-B”)
The blending ratio is as shown in Table-1.

  A bag body shown in FIG. 1 was prepared in which the non-liquid concrete constituent material was filled in the bag at the ratio shown in Table-1. And fresh concrete was manufactured with the self-propelled mobile mixer truck shown in FIG.

For comparison, a ready-mixed concrete having the following characteristics was produced in an existing ready-mixed concrete factory at the same blending ratio as in the example.
Ready-mixed concrete (30-12-20N) based on JIS A 5308
・ Nominal strength: 30 N / mm ² (W / C = 50.7%)
・ Target slump: 12cm
・ Target air volume: 4.5%
・ Transportation time from the factory: about 90 minutes

In order to check the quality variation, the ready-mixed concrete (compounds 1 and 2) manufactured in the above example and the comparative ready-mixed concrete manufactured in the existing ready-mixed concrete factory were repeatedly performed 20 times at the casting site. The coefficient of variation of the value was examined. The results are shown in Table-2.
Table 2 (Quality fluctuation)
Manufacturing system Formulation Coefficient of variation (%)
Production system of the present invention Formulation 1 5.8
Production system of the present invention Formulation 2 4.2
Production system of the present invention Formulation 3 3.3
Production system of the present invention Formulation 4 2.2
Production system of the present invention Formulation 5 5.0
Production system of the present invention Formulation 6 6.1
Production system of the present invention Formulation 7 3.9
Manufacturing of existing raw concrete factory 30-12-20N 17.5

  The ready-mixed concrete of this example has a smaller coefficient of variation than that produced in an existing ready-mixed concrete factory, and can ensure stable quality.

  Furthermore, manufacturing in a narrow space was assumed. That is, the production of concretes 1 to 7 shown in Table 1 was performed in a warehouse having a ceiling height of about 4 m. The result was completely satisfactory. The fact that concrete can be manufactured in a narrow room makes it possible to manufacture concrete in the tunnel. Furthermore, if it is manufactured indoors, it becomes possible to manufacture ready-mixed concrete that is not affected by the weather. In addition, dust generation during indoor concrete production was examined. As a result, no problematic dust generation was observed. The concrete was manufactured by one worker. Therefore, labor saving was achieved. Such a feature is a feature that was not found at all in conventional concrete production in the field.

1 Outer bag 2 Inner bag 3 String 4 Substance (cement)
5 Substance (Aggregate)
6 String 7 Hanging tool 11 Hopper 12 Mixer 13 Transfer arm

Claims (7)

A method for producing concrete using a liquid concrete constituent material and a non-liquid concrete constituent material having at least cement and aggregate,
For the concrete production,
A specified amount of the non-liquid concrete constituent material is separated into constituent material types, and a storage container stored therein,
A hopper, a mixer, a transport arm for transporting the hopper to the inlet of the non-liquid concrete constituent material of the mixer, and a liquid concrete constituent material measured by a measuring instrument for measuring the liquid concrete constituent material And a self-propelled mobile vehicle equipped with a transport mechanism for transporting the fuel into the mixer,
The in-hopper loading step in which the storage container is lifted on the hopper, the closing portion of the storage container is opened, and a specified amount of the non-liquid concrete constituent material in the storage container is charged into the hopper;
After the hopper loading process, the hopper is transported to the mixer inlet by the transport arm of the self-propelled mobile vehicle; and
After the conveying step, the non-liquid concrete constituent material in the hopper is thrown into the mixer of the self-propelled mobile vehicle, and the non-liquid concrete constituent material in-mixing step,
Liquid-based concrete constituent material metered in the liquid-based concrete constituent material mixer in which the liquid-based concrete constituent material measured by the measuring instrument is charged into the mixer of the self-propelled mobile vehicle;
The concrete manufacturing method characterized by including the concrete manufacturing process by which the said mixer operates and concrete is manufactured. The method for producing concrete according to claim 1, wherein at least one of the liquid-based concrete constituent material and the non-liquid-based concrete constituent material includes an admixture (and / or an admixture). A hanging tool used when moving the storage container on the hopper is provided,
The storage container suspended on the hopper is opened in a closed portion provided on the bottom side thereof so that the non-liquid concrete constituent material in the storage container is sequentially or simultaneously for each configuration type. The concrete manufacturing method according to claim 1, wherein the concrete is discharged downward. A system in which a concrete is manufactured using a liquid concrete constituent material and a non-liquid concrete constituent material containing at least cement and aggregate,
The system comprises a storage container and a self-propelled mobile vehicle,
The storage container is
A specified amount of the non-liquid concrete constituent material is a container that is separated into constituent material types and stored.
The self-propelled mobile vehicle is
A hopper,
A mixer,
A transport arm for transporting the hopper to the inlet of the non-liquid concrete constituent material of the mixer;
A measuring instrument for measuring the liquid concrete constituent material;
A concrete manufacturing system comprising: a transport mechanism for transporting the liquid concrete constituent material measured by the measuring instrument into the mixer. 5. The concrete manufacturing system according to claim 4, wherein at least one of the liquid concrete constituent material and the non-liquid concrete constituent material has an admixture (and / or an admixture). When the storage container is opened at its bottom side, the non-liquid concrete constituent material in the storage container is discharged downward in order or at the same time for each configuration type. The concrete manufacturing system according to claim 4 or 5, wherein the concrete manufacturing system is configured as described above. The concrete production system according to any one of claims 4 to 6, which is used in the concrete production method according to any one of claims 1 to 3.