JP4810131B2 - Method for producing curable composition - Google Patents

Description

The present invention, by crushing lumps of slag generated in the refining or the like of steel, relates the crushed material in the production method of the curable composition to be used as an aggregate equivalent.

  In recent years, steel slag has been used as a part of raw concrete aggregate from the viewpoint of effective use of resources, or the concrete mass generated when demolishing an existing concrete structure is used as the total amount of aggregate required for raw concrete. It is made to use. For example, as shown in FIG. 6, an existing concrete lump A is inserted into a crushing device B with a backhoe or the like and crushed. In the production of ready-mixed concrete, as shown in FIG. 7, the container C is lifted by a crane E and put into a kneading device F, and other concrete components such as cement and water are supplied to the kneading device F. There is known a method for producing ready-mixed concrete by stirring.

  However, according to the method for producing ready-mixed concrete, a plurality of containers storing the crushed material A ′ crushed by the crushing apparatus B together with a place where the concrete block A formed by dismantling the concrete structure is accumulated. Not only does it require a stocking place to store C once, but it also requires the troublesome work of lifting the containers C one by one by crane E and putting them into the kneader F when producing ready-mixed concrete. There is.

Therefore, as described in Patent Document 1, a kneading part is arranged below the crushing part for crushing the concrete lump, and after a certain amount of concrete lump is put into the crushing part and crushed, this constant quantity The whole amount of the crushed material is discharged to the lower kneading part and the concrete material such as cement, water, admixture, etc. is added to the kneading part at a blending ratio according to the amount of the crushed material and stirred to prepare the ready-mixed concrete. Manufacturing methods have been developed.
JP 2001-150426 A

  However, according to this method for producing ready-mixed concrete, a predetermined amount of ready-mixed concrete is produced by the kneading unit after a certain amount of concrete block has been put into the crushing unit, and this ready-mixed concrete is removed from the kneading unit to a mixer truck, etc. It is necessary to stop the charging of the concrete block into the crushing part until it is supplied to the transport vehicle, and further, the kneading part is kneaded until the crushing of the entire amount of the concrete block in the crushing part is completed. Therefore, there is a problem that the production efficiency of ready-mixed concrete is extremely poor and the waiting time of a transport vehicle such as a mixer truck becomes long.

  On the other hand, in the above-mentioned steel slag, which is industrial waste, as well as the existing demolished concrete structure, the crushed material of the slag lump is used as a part of fine aggregate of ready-mixed concrete. However, the total amount of coarse aggregate and fine aggregate necessary for a curable composition such as ready-mixed concrete is not obtained from crushed steel slag.

The present invention has been made in view of such problems, and its purpose is to use a crushed material of slag lump such as steel slag as the total amount of aggregate necessary for the curable composition, It is in providing the manufacturing method of the curable composition which can manufacture a fixed quantity of curable composition continuously and efficiently.

In order to achieve the above object, the method for producing a curable composition of the present invention, as described in claim 1, crushes a large-diameter annealed slag lump obtained by gradually cooling steel slag and the like. while supply by a predetermined amount the crushed material the total amount was crushed to a size suitable for use as aggregate into a plurality of storage container of the curable composition by parts, the reservoir which has already stored a certain amount of the crushed material The entire amount of the crushed material is supplied from the container to the kneading part as an aggregate, and a predetermined amount of water and hydraulic material corresponding to the amount of the crushed material supplied are supplied to the kneading part and kneaded . A method for producing a composition, wherein each of the storage containers is provided with a measuring instrument for measuring the crushed material put into the storage container, and the crushed material put into an empty storage container from the crushing section Is weighed with a measuring instrument attached to the storage container. When it is detected that a certain amount of crushed material necessary for the production of the curable composition is contained, the supply of crushed material from the crushing section is switched to another empty storage container side, and the storage container by this switching The supply of crushed material into the inside is cured by putting all the crushed material from a storage container in which a certain amount of crushed material is already stored into a kneading part and kneading a predetermined amount of water and a hydraulic material. Characterized in that it is carried out during the production of the composition .

  According to the present invention, crushed pieces of slowly cooled slag crushed to a size suitable for use as an aggregate of the curable composition are sequentially stored in a plurality of storage containers in the storage section, while these storage sections The entire amount of crushed material in one storage container is supplied to the kneading part from the storage container and stirred and mixed with a predetermined amount of other curable composition constituent materials according to the amount of the crushed material. Since the chilled slag lump is continuously crushed even during the production of the curable composition by the kneading unit, a certain amount of slowly cooled slag lump is added to the empty storage containers in the plurality of storage containers. The crushed material of the slag can be supplied to the kneading part immediately after the production of a certain amount of the curable composition by the kneading part. The amount of crushed material along with the supply Therefore, it is possible to produce a curable composition by supplying other curable composition constituent materials such as water and a hydraulic material with the same mixing ratio, and therefore, the curable composition can be produced efficiently. A certain amount of the curable composition can be sequentially supplied to a transport vehicle such as a mixer vehicle without delay.

  Furthermore, each storage container in the storage unit stores a certain amount of slag crushed material used for the production of the curable composition at one time, and the total amount of the crushed material and other amounts corresponding to this amount. Since the curable composition constituent material is supplied to the kneading part at a predetermined blending ratio, a certain amount of the curable composition always having a certain physical property can be stably produced.

In addition, each storage container is provided with a measuring instrument for weighing the crushed material put into the storage container, and the crushed material put into the empty storage container from the crushing section is attached to the storage container. When a certain amount of crushed material necessary for the production of the curable composition is detected by weighing with a measuring instrument, the supply of crushed material from the crushing section is stored in another empty storage. Since it is configured to switch to the container side , the slow-cooled slag lump is crushed by a simple device while synchronizing the crushing speed of the slowly-cooled slag lump by the crushing part and the production rate of the curable composition in the kneading part. And a certain amount of the curable composition can be efficiently produced.

  A specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a crushed product of a large-diameter slow-cooled slag lump obtained by gradually cooling steel slag without using natural aggregate. A basic structure for carrying out a method for producing a curable composition by adding and kneading a hydraulic material such as slag fine powder, fly ash, slaked lime, cement and water to this aggregate. The bone crushed by this crushing part 1 below the crushing part 1 for crushing the large diameter slow-cooled slag lump A obtained by slowly cooling the steel slag generated at the time of steel refining A storage section 2 having a plurality of storage containers 2a1 and 2a2 (two in the figure) for storing a certain amount of slag crushed material as a material is disposed, and further below the storage section 2 1 in the storage part 2 It is disposed kneading unit 3 for kneading the other curable compositions constituent material of the slag crushed whole amount and the water and hydraulic materials discharged from distillation vessel 2a1 or 2a2. In addition, as a crushing apparatus which comprises the crushing part 1, a jaw crusher, a cone crusher, a roll crusher, etc. are employable.

  The crushed material transporting path 4 for supplying the crushed material of the slowly cooled slag lump crushed by the crushing part 1 into the storage containers 2a1 and 2a2 in the storage part 2 comprises a pipe line, and this pipe line has an upper end opening. Is connected to the upper end of each of the storage containers 2a1 and 2a2 by branching from the lower end of the vertical pipe portion 3a and the vertical pipe portion 4a facing the crushed material dropping port 1a at the lower end of the crushing portion 1 A switching damper 5 for switching the supply of crushed material to the branch pipe sections 4a1 and 4a2 is provided in the lower end portion of the vertical pipe section 4a. Yes. Each storage container 2a1 and 2a2 is provided with measuring instruments 6a1 and 6a2 for measuring crushed materials introduced through the branch pipe sections 4a1 and 4a2, respectively. The measuring containers 6a1 and 6a2 store the storage containers 2a1 and 6a2. 2a2, when it is detected that a certain amount of slag crushed material required for manufacturing the curable composition is contained, the damper control unit CPU is connected from the measuring devices 6a1 and 6a2. The switching damper 5 is switched to switch the switching damper 5 through a signal.

  Further, the bottom surfaces of the storage containers 2a1 and 2a2 are formed at discharge ports 2b1 and 2b2 that can be opened and closed by doors, respectively, and the upper end opening of the hopper 7 faces the discharge ports 2b1 and 2b2. The lower end of 7 faces the kneading part 3. Further, the kneading unit 3 is configured to supply water, a hydraulic material, and an admixture that are weighed in amounts necessary for one-time production of the curable composition by the kneading unit 3 through respective supply pipes. is doing.

  Since it comprised in this way, the lower end discharge port of one storage container 2a1 which has accommodated and stored a fixed quantity of crushed pieces of the slow-cooled slag lump crushed by the crushing part 1 is opened, and the crushed substance in the container Is added to the kneading part 3 through the hopper 6 and the water, the hydraulic material and the admixture are measured so as to have a blending ratio for producing a predetermined curable composition with respect to the amount of the crushed material. Is introduced into the kneading section 3 and stirred and kneaded to produce a certain amount of the curable composition. The admixture is a generic term for a water reducing agent, an AE agent, or the like used for improving properties such as increase in workability and initial strength by mixing a little into a curable composition such as concrete.

  During the production of the curable composition by the kneading unit 3, the crushed material of the slowly cooled slag lump crushed by the crushing unit 1 is perpendicular to the crushed material conveying path 4 in the empty storage container 2 a 1. A certain amount necessary for the production of the curable composition for one batch is supplied from the pipe line part 4a through the switching damper 5 through the branch pipe part 4a1 communicating with the storage container 2a1.

  Then, during the supply of the crushed material from the crushing section 1 into the storage container 2a1, the production of the curable composition for one batch in the kneading section 3 is completed, and the curable composition is mixed with a mixer car or the like. When the crushed material in the next storage container 2a2 is fed into the kneading part 3, the predetermined curable composition is produced for the amount of the slag crushed material as described above. Water, a hydraulic material, and an admixture weighed so as to have a blending ratio for charging are added to the kneading unit 3 and stirred and kneaded to produce a curable composition.

  At this time, during the production of the curable composition by the kneading unit 3, a certain amount of the crushed material of the slowly cooled slag lump crushed by the crushing unit 1 in the same manner as described above is stored in the empty storage container 2a2. Supply and store. When the slowly cooled slag lump A is introduced into the crushing part 1, this slowly cooled slag lump A is crushed into a crushed material having a size suitable for use as an aggregate of the curable composition. It is put into the vertical pipe section 4a of the crushed material transport path 4. When the slag lump A is slowly crushed by the crushing part 1 and the crushed material is dropped one after another into the vertical pipe part 4a, it is disposed in the lower end part of the pipe part 4a. The switching damper 5 is circulated to the branch pipe section 4a1 communicating with either one of the two empty storage containers 2a1 and 2a2, and the empty storage container 2a1 is passed through the branch pipe section 4a1. Supplied in.

  The amount of crushed material supplied into the storage container 2a1 is detected by the measuring device 6a1, and when the amount reaches the amount necessary for one time production of the curable composition, the measuring device 6a1 supplies the switching damper. When the switching damper 5 is switched to the other branch conduit 4a2 side and the other storage container 2a2 is empty, the crushed material of the slowly cooled slag lump A crushed by the crushing unit 1 is When the vertical pipe portion 4a passes through the branch pipe portion 4a2 and is supplied into the other storage container 2a2, and the supply amount to the storage container 2a2 becomes the same amount as the one storage container 2a1. A signal is sent from the measuring instrument 6a2 to the switching damper 5, and the switching damper 5 is switched so that the crushed material can be supplied to the one branch pipe section 4a1 side.

  Thus, when the production of a certain amount of the curable composition by the kneading unit 3 is completed and the next curable composition is produced, a certain amount of crushed material is immediately removed from one of the storage containers 2a1 and 2a2. It is to be able to supply.

  In addition, in the basic configuration for carrying out this method for producing a curable composition, a double-type type in which two storage containers 2a1 and 2a2 are juxtaposed below the crushing part 1 is shown. It is good also as a double connection type using one or more storage containers.

  Fig. 2 shows a quadruple type. Four storage containers 2a1, 2a2, 2a3, 2a4 are arranged side by side, and a certain amount of slag crushed material from the crushing part 1 side to these storage containers 2a1-2a4 As the crushed material transport passage 4 for supplying the crushed material, the two first ones are connected via the first switching damper 5a from the lower end of the vertical pipe portion 4a having the upper end opening facing the drop port 1a of the crushed portion 1. Two sets of second branch pipes 4b1 and 4b2 are connected to each other through the second switching dampers 5b1 and 5b2 from the lower ends of the branch pipes 4a1 and 4a2, respectively. 4b3 and 4b4, respectively, and the lower ends of the openings of the respective second branch pipes 4b1 to 4b4 are respectively exposed to the upper end openings of the four storage containers 2a1, 2a2, 2a3 and 2a4. It is.

  The lower outlets 2b1 to 2b4 opened and closed by the doors of the four storage containers 2a1 to 2a4 are exposed to the upper end of the kneading unit 3 through one common hopper 7 as in the above embodiment. The storage containers 2a1 to 2a4 are provided with measuring instruments 6a1 to 6a4.

  Since it comprised in this way, the lower end discharge port of one storage container 2a1 which has accommodated and stored a fixed quantity of crushed pieces of the slow-cooled slag lump crushed by the crushing part 1 is opened, and the crushed substance in the container Is added to the kneading part 3 through the hopper 7, and water, a hydraulic material and an admixture are measured so as to have a blending ratio for producing a predetermined curable composition with respect to the amount of the crushed material. Is introduced into the kneading section 3 and stirred and kneaded to produce a certain amount of the curable composition. During the production of the curable composition, a certain amount of the crushed material of the slowly cooled slag lump crushed by the crushing unit 1 is supplied to the empty storage container 2a1.

  In this case, the measuring device 6a1 detects that the storage container 2a1 is empty, and sends a signal to the first and second switching dampers 5a, 5b1, and 5b2 via a damper control unit (not shown). The first and second switching dampers 5a, 5b1, and 5b2 are switched so that the first and second branch pipes communicate with the storage container 2a1, and the crushed material is supplied from the crushing unit 1 to the storage container 2a1. When the crushed material reaches a certain amount necessary for the production of the curable composition for one batch, the supply of the crushed material to the storage container 2a1 is stopped by issuing a signal from the measuring device 6a1 and switching the switching damper. .

  When the production of a certain amount of the curable composition in the kneading part 3 is completed, a predetermined amount of crushed material stored in the next storage container 2a2 is put into the kneading part 3 and a predetermined amount of water is added. The curable composition is produced by kneading in the same manner as described above together with other curable composition constituent materials such as hydraulic materials and hydraulic materials, and the slowly cooled slag crushed by the crushing section 1 in the storage container 2a2 emptied during this time A certain amount of crushed material is supplied in the same manner as described above. In this way, a certain amount of crushed material stored in all the storage containers 2a1 to 2a4 is sequentially added to the kneading part 3 as an aggregate of the curable composition to produce a curable composition.

  Next, FIGS. 3 and 4 show an apparatus that can supply and store a certain amount of crushed material in a plurality of storage containers 2a1, 2a2,... Without using a switching damper. The plurality of storage containers 2a1, 2a2,... Are arranged side by side so as to be pivotable in the horizontal direction around the rotation center axis 2c, and the upper end opening of the pipe line 4 ′ is opened to the crushed material dropping port 1a of the crushing section 1. The lower end of the pipe line 4 ′ is faced on one of the plurality of storage containers 2a1, 2a2,... (Not shown) are provided, and discharge ports 2b1, 2b2,... That can be opened and closed by a door are provided at the bottom of each storage container, and the kneading section 3 is installed below any one of the storage containers. Is.

  As a specific structure of the storage part 2, the inside of the cylindrical container 2 ′ in which the rotation center shaft 2c is disposed at the center is partitioned by partition plates 2d disposed at regular intervals in the circumferential direction. Thus, a space surrounded by adjacent partition plates 2d is formed in the storage container, and a rack 2e is integrally provided on the outer peripheral surface of the lower end of the cylindrical container 2 ', and a motor is provided in the rack 2e. The pinion 2g fixed to the rotating shaft of 2f is meshed, and the storage containers 2a1, 2a2,... Are sequentially moved to the lower side of the pipe line 4 ′ by driving the motor 2f. One storage container is configured to move above the kneading unit 3 at a position different from that immediately below.

  Since it comprised in this way, the crushed material of the slow-cooled slag lump A crushed by the crushing part 1 is supplied in one storage container 2a1 through the pipe line 4 ', and the supply amount is made constant by the measuring device 6a1. When it is detected that this has occurred, the motor 2f is operated to move the next storage container 2a2 to a position below the pipe line 4 ′, and a certain amount of crushed material is supplied into the storage container 2a2. Hereinafter, similarly, the slag crushed material is supplied from the crushing part 1 side to the empty or empty storage container through the pipe line 4 ′.

  On the other hand, the storage container located on the kneading part 3 opens all the crushed material stored in the kneading part 3 by opening the discharge port, and has a predetermined amount with respect to the amount of crushed material. Water, a hydraulic material, and an admixture weighed so as to have a blending ratio for producing the curable composition are charged into the kneading unit 3 and stirred and kneaded to produce a certain amount of the curable composition. Then, during the production of the curable composition, the evacuated storage container is moved to the lower side of the pipe line 4 ′, and the crushed material of the slowly cooled slag lump A crushed by the crushing unit 1 is taken into the pipe line 4. 'Supply a certain amount to this storage container. When the crushed material is supplied to the storage container and there is no empty storage container in which the crushed material is not stored, the outlet of the pipe 4 'is closed and the slowly cooled slag lump A is crushed by the crushing unit 1. It is configured to stop.

  When the production of a certain amount of the curable composition in the kneading part 3 is completed, a predetermined amount of crushed material stored in the next storage container is put into the kneading part 3 and a predetermined amount of water or A curable composition is produced by kneading in the same manner as described above together with other curable composition constituent materials such as hydraulic materials, and the crushed material crushed by the crushing unit 1 in a storage container 2a2 emptied during this period Amount supplied as above. In this way, a certain amount of crushed material stored in all the storage containers 2a1, 2a2,... Is sequentially added to the kneading part 3 as an aggregate of the curable composition to produce a curable composition. .

  FIG. 5 shows a specific embodiment for carrying out the method for producing the curable composition, and the first conveyor 41 is used as the crushed material transport path 4 from the crushing section 1 to the storage section 2. The second conveyor 42, the third conveyor 43, and the vertical pipe section 4a having the switching damper 5 and the branch pipe sections 4a1 and 4a2 are provided on the first conveyor 41 from the grease feeder 8 and the jaw crusher. The primary crushing part 1 which becomes is arrange | positioned.

  Above the conveyance start end portion of the third conveyor 43, a sizing device 10 for receiving the slag crushed material falling from the conveyance end of the first conveyor 41 is disposed, and the mesh of the filter 10a of the sizing device 10 is arranged. A large-diameter slag crushed material that cannot pass through the filter 10a is discharged onto the second conveyor 42 from the lower inclined end of the filter 10a and is crushed more finely than the primary crushing section 1 through the vibro feeder 11 from the conveying end of the second conveyor 42. The slag crushed material crushed by the secondary crushing device 1 'is fed onto the first conveyor 41 through the return path 12. ing.

  A storage section 2 is disposed below the transfer end of the third conveyor 43 via a vertical pipe section 4a having the switching damper 5 and branch pipe sections 4a1 and 4a2. The fourth conveyor 44 is disposed below each of the storage containers 2a1 and 2a2 that constitutes the storage container 2a1, and the conveyance terminal portion of the fourth conveyor 44 is placed on the kneading unit 3 including a biaxial forced kneading mixer.

  On the other hand, a silo 13 of a hydraulic material such as cement, a water tank 14, a water reducing agent tank 15, and an AE agent tank 16 are installed in a place different from the primary and secondary crushing parts 1 and 1 'and the storage part 2. From the silo 13 of the hydraulic material, the hydraulic material is supplied into the measuring device 18 through the screw feeder 17, and a certain amount of hydraulic material is supplied from the measuring device 18 to the kneading unit 3 through the supply line 19. It is constituted so that. The water tank 14 feeds water to the water meter 22 through a water feed line 21 having a pressure feed pump 20 and supplies a certain amount of water from the water meter 22 to the kneading apparatus 2 through the water supply line 23. Is configured to supply.

  Further, the water reducing agent tank 15 and the AE agent tank 16 send the water reducing agent and the AE agent to the common admixture meter 28 through the feed lines 26 and 27 having the pressure pumps 24 and 25, respectively. A certain amount of the admixture is supplied to the kneading apparatus 2 through the admixture supply pipe 29.

  If necessary, a storage and weighing hopper 30 for sand (river sand, sea sand, granulated slag sand, etc.) is installed at an appropriate place, and a certain amount of sand is transferred from the hopper 30 to the fourth conveyor 44 through the fifth conveyor 45. It is configured to supply.

  In order to produce a curable composition using the apparatus configured as described above, when a large-diameter slow-cooled slag lump obtained by gradually cooling steel slag generated during steel refining is introduced into the grizzly feeder 8, The fine slag mixed in the cold slag lump passes through the mesh of the screen 8a stretched on the grizzly feeder 8 and is placed on the first conveyor 41 below, but has a large diameter that cannot pass through the screen 8a. The slow-cooled slag lump is dropped onto the crushing part 1 from the inclined lower end of the screen 8a, crushed to a predetermined size or less by the crushing part 1, and then dropped onto the first conveyor 41 from the drop port 1a of the crushing part 1. To do. Then, the crushed material (hereinafter simply referred to as crushed material) crushed in the crushing unit 1 together with the small-diameter slag that has passed through the mesh of the screen 8a is put into the particle sizer 10 from the conveyance end of the first conveyor 41. .

  When the crushed material is put into the particle sizer 10, the crushed material that has passed through the mesh of the screen 10 a of the particle sizer 10 is placed on the third conveyor 43. The mesh size of the screen 10a is formed to the maximum size of the aggregate that can be used as the aggregate for the curable composition. Therefore, the crushed material that has passed through the screen 10a is coarse aggregate and Can be used as fine aggregate. On the other hand, a large-diameter crushed material that cannot pass through the screen 10a is discharged from the inclined lower end of the screen 10a onto the second conveyor 42, and is fed from the second conveyor 42 into the secondary crushing apparatus 1 'through the vibro feeder 11.

  The crushed material crushed by the secondary crushing device 1 ′ is sent again to the first conveyor 41 through the return path 12, and is fed from the first conveyor 41 to the particle sizer 10, and in the same manner as above, The crushed material suitable for the aggregate and the crushed material having a larger diameter than the aggregate by the granulator 10 are sent to the secondary crusher 1 'side again and crushed. By repeating the above, all the crushed materials are processed into crushed materials having a size suitable as an aggregate for the curable composition, and dropped and supplied from the sizing apparatus 10 onto the third conveyor 43.

  The crushed material thus processed to the size of the aggregate is fed from the third conveyor 43 into the pipe line portion 4a provided with the switching damper 5, and the switching damper 5 communicates with the empty storage container 2a1 or 2a2. The crushed material is supplied and stored in the storage container 2a1 or 2a2 that is emptied by switching to the pipe line part 4a1 or 4a2 side, or the storage container 2a1 or 2a2 that is emptied. At this time, as described above, the measuring containers 6a1 and 6a2 are attached to the respective storage containers 2a1 and 2a2, and the slag crushed material in an amount necessary for manufacturing the curable composition for one time is stored in the storage containers 2a1 and 2a2. Is supplied from the detectors 6a1 and 6a2, and the switching damper 5 is switched via a damper control unit (not shown) to supply the crushed material to the storage container 2a1 or 2a2. Stop. The structure of the storage unit 2 is not limited to such a double type, but may be a device including a plurality of storage containers such as a quadruple type as described above, and a third conveyor. The supply of crushed material to each storage container from 43 through the vertical pipe portion 4a may be an apparatus as shown in FIG. 3 and FIG. A structure may be adopted.

  When the curable composition is produced, if the lower end discharge port of one storage container 2a1 or 2a2 storing a certain amount of crushed material is opened, the entire amount of crushed material in the storage container 2a1 or 2a2 is obtained. The fourth conveyor 44 dropped on the conveyor 44 is put into the kneading section 3. Further, the kneading part 3 is also charged with the hydraulic material, water and the admixture in an amount necessary for the production of the curable composition at one time from the hydraulic material meter 18, the water meter 23 and the admixture meter 28. And a curable composition is manufactured by knead | mixing with the crushed material as said aggregate.

  Immediately after the hydraulic material, water, or admixture is supplied to the kneading unit 3, or during the production of the curable composition, the hydraulic material is measured by the screw feeder 17 from the cement silo 13 and the meter for measuring the hydraulic material. A certain amount of hydraulic material is measured so that the blending ratio is in accordance with the amount of a certain amount of crushed material required for the production of the curable composition at one time. Wait for production of the curable composition. Similarly, water, water reducing agent, and AE agent are also supplied from the water tank 14, water reducing agent tank 15, and AE agent tank 16 by pressure pumps 20, 24, and 25 through the pipelines 26 and 27, and the water meter 22 and the admixture meter. Measured so as to have a blending ratio corresponding to the amount of a certain amount of crushed material required for manufacturing a curable composition at one time, and the next curable composition in each measuring instrument 22, 28 Let's wait for manufacturing.

  After the production of the curable composition for one batch by the kneading section 3, the curable composition is accommodated in the transport vehicle B such as a mixer truck from the discharge hopper of the kneading section 3, and then a certain amount of crushed material is again obtained. In the same manner as described above, the crushed material is supplied to the kneading unit 3 from one of the other storage containers, and the hydraulic material measuring device 18, the water measuring device 22, and the admixture measuring device 28 supply these measuring devices. The amount of hydraulic material, water, and admixture necessary for the production of the one-time curable composition retained therein is also supplied to the kneading unit 3 to produce the following fixed amount of the curable composition.

  Before the production of the curable composition is completed, the hydraulic material meter 18, the water meter 22, and the admixture meter 28 are supplied with water in an amount necessary for the production of a single curable composition. Storage that is emptied so that there is at least one storage container that contains a hard material, water, and admixture, and that stores a certain amount of crushed material during the manufacture of the curable composition. A certain amount of crushed material is supplied and stored in the container.

  The curable composition produced as described above can ensure good fluidity and is excellent in physical properties such as slump, and there is no problem in the development of strength after placement. In addition, as a hydraulic material added to the aggregate made of slag crushed material, blast furnace slag fine powder, fly ash, slaked lime, or a mixture thereof can be used in addition to cement. Furthermore, the slow-cooled slag lump is not limited to steel slag such as blast furnace slag and steelmaking slag, but can be applied to slowly-cooled slag generated in any furnace, such as waste molten slag, ferronickel slag, and copper slag. is there.

The simplified longitudinal cross-sectional view which shows the basic structure of the manufacturing apparatus of a curable composition. The simplified longitudinal cross-sectional view at the time of making a storage container into a quadruple type. The simplified perspective view of the storage part of another structure. FIG. The general view of the specific curable composition manufacturing apparatus. The simplification figure which shows the prior art example which stocks the storage container. The simplification figure of the state which is dropping the crushed material from the storage container to the kneading apparatus.

Explanation of symbols

1 crushing part 2 storage part
2a1, 2a2 Storage container 3 Kneading part 4 Crushed material transport path
4a Vertical pipe section
4a1, 4a2 Branch pipe section 5 Switching damper
6a1, 6a2 Weighing instrument

Claims (1)

The slow-cooled slag lump is crushed by a crushing part into a size suitable for use as an aggregate of the curable composition, and the whole amount of the crushed material is supplied to a plurality of storage containers one by one. The entire amount of the crushed material is supplied to the kneading section as aggregate from the storage container storing the material, and a predetermined amount of water and hydraulic material corresponding to the supply amount of the crushed material are supplied to the kneading section. Each of the storage containers is provided with a measuring instrument for measuring the crushed material charged into the storage container, and the storage container is empty from the crushing section. When it is detected that a certain amount of crushed material necessary for the production of the curable composition is accommodated by measuring the crushed material charged in the storage container attached to the storage container, Switch the supply of crushed material from the crushing section to another empty storage container side, By supplying the crushed material into the storage container by switching, the entire amount of crushed material from the storage container in which a certain amount of crushed material is already stored is put into the kneading part to supply a predetermined amount of water and hydraulic material. A method for producing a curable composition, which is performed while producing a curable composition by kneading .

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