JPS588330B2 - Continuous mixing method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the invention of a continuous mixing method and device for continuously mixing fine aggregate such as sand and powder of a hydraulic substance such as cement. To produce a new mixed preparation efficiently and in a state suitable for a continuous production system by sequentially and continuously forming a mixed state of not only aggregates but also water and other liquids under the respective addition conditions in multiple stages. The aim is to provide a method and device that can.

Various technical methods for obtaining various mixtures have been studied and implemented in the past, and it has been found that mixing these mixtures in multiple stages is more advantageous than simply mixing them. Sometimes.

For example, the shell-forming kneading technology proposed by the present inventors for preparing a mixture of hydraulic substances such as cement (Japanese Patent Application No. 54-1
2164: Japanese Unexamined Patent Publication No. 55-104958), a specific amount of water adhering to the surface of fine aggregate such as sand is formed by mixing in the first stage, and another material is added to this state in the second and subsequent stages. It has been revealed that by adding such a mixture, a raw mixture different from that obtained by simply mixing the entire mixture can be obtained, and it is possible to obtain a special raw mixture using the same materials.

By the way, in order to perform such multi-stage mixing in a batch method, the purpose can be achieved simply by adding the mixed or kneaded materials in multiple stages, but this batch method is not suitable for the continuous working methods of today's industrial equipment. Otherwise, the green kneaded material, which generally needs to be prepared in large quantities for civil engineering and construction work, cannot be obtained appropriately.

That is, it is preferable to carry out the above multi-stage mixing continuously, but under the conditions where water or other highly fluid liquids are involved, this continuous mixing is preferred. Few techniques are found that can be properly implemented by mixed methods.

The present invention was devised after repeated studies in view of the above-mentioned circumstances, and it is possible to smoothly carry out appropriate continuous mixing under the above-mentioned conditions by adopting a specific method and equipment. succeeded in.

That is, in the first method according to the present invention, the amount of water to be attached to the particles is kept constant by adding particles such as sand and adding a part of the water to be finally added and mixed. A second mixing process in which a powder such as cement is added to the mixture that has gone through the first mixing process and mixing is continued, and the remainder that should be added to the mixture that has gone through the second mixing process. The third mixing process consists of adding moisture and continuing mixing, and the elastic action of the tensioned elastic membrane piece of the housing body is urged inward of the mechanism and the sliding contact with the periphery of the screw mechanism causes at least Each of the above mixing processes is performed while substantially preventing the water added in the third mixing process from entering the first or second mixing process, and the second mixing process described above In the third mixing process, the excess powder added to the particles is dispersed by the three-dimensional air flow effect obtained between the elastic membrane piece and the periphery of the rotating screw mechanism. Coarse particles are added, or one or more types of additives such as a dispersant, an accelerating agent, a retarder, etc., which are used to adjust the reaction conditions or mixing conditions in the mixture, are added.

To specifically explain the apparatus shown in the accompanying drawings for carrying out the method of the present invention as described above, as shown in FIGS. 1 and 2, a mixing chamber 10 with a screw mechanism 4 installed horizontally
has a U-shaped cross section as shown separately in FIG. 3, and an elastic membrane piece 5 is provided on the bottom surface of the elastic membrane piece 5. The mixing chamber 1
However, above the mixing chamber 10 as described above, a series of openings 7 are formed in the above-described U-shape configuration, and the openings 7 are From one side of the mixing chamber 10, a first material inputting mechanism 1 having a conveyor 11, a second material inputting mechanism 2 having a quantitative cutting mechanism 12, and another material feeding mechanism 2 having a quantitative cutting mechanism 13 are introduced. No. 3 resource input mechanisms 3 are arranged at predetermined intervals, and a pipe 15 from a tank 14 provided separately from these is provided behind the first input mechanism 1 and is used for inputting. A regulated predetermined amount of water is added to the sample through the valve 15V, and a branch pipe 16 from the pipe 15 is led to the rear of the third input mechanism 3 and is connected to the valve 16.
A predetermined amount of water with an adjusted setting of V is constantly supplied.

In addition to these, there is a pipe 1 hanging down from the admixture tank 17.
Reference numeral 8 is located at the rear of the third feeding mechanism 3 together with the branch pipe 16, and is filled with one or two types of admixtures such as a dispersant, a retarder, and an accelerating agent.
(If it is not preferable to mix a plurality of admixtures in advance, the tank 17 and piping 18 will be provided in plural numbers.)

A discharge port 9 is formed below the rear end of the mixing chamber 10, and a receiver 20 or a conveyor is provided below the discharge port 9 to continuously receive and carry out the mixed preparation.

In order to force out the elastic membrane piece 5 into the mixing chamber 10 in the pressurizing mechanism chamber 6 described above, the pressurizing mechanism chamber 6 is sealed and a fluid such as air or water is pressurized into the inside thereof.

That is, it is clear that the membrane piece 5 is forced out into the mixing chamber 10 by filling the pressurized fluid in this way, but the adhesion of the mixed material to the membrane piece 5 can also be achieved by applying pulsation to such a fluid. Facilitates removal.

However, according to the present invention, in some cases, a sponge-like rubber material or hairlock (human hair, pig hair, coconut fiber, etc.) is formed into a curly, loose and irregular state, that is, generally simply mixed with latex, synthetic resin binding. Even if other cushioning material 19 is filled as shown in FIG. 3, the above-mentioned pressurized fluid-filled case A similar effect can be obtained.

Furthermore, it is clear that the membrane piece 5 and the pressurizing mechanism chamber 6 may be formed in series on the entire bottom surface of the mixing chamber 10, but in particular when pressurizing fluid as described above, an appropriate length is required. It is preferable to adopt a plurality of membrane pieces 5 by dividing them into units of 100 mm.By doing this, it is possible to prevent the membrane pieces 5 from protruding excessively into the mixing chamber 10, that is, on average. It can be prevented from being forced out and causing a problem in the rotation of the screw mechanism 4.

It is clear that when the device according to the present invention performs the above-described kneading, the first feeding mechanism 1 as described above is used for feeding fine aggregate such as sand. It is well known that the moisture content of sand varies in various ways, and according to the technology proposed by the present inventors, the moisture content of sand is set to a specific state, and cement powder is added to this. By adding it, a favorable shell-forming effect can be obtained, and a product with excellent strength and consistency can be obtained.

That is, in such a case, if the adhering water content of the sand itself changes as described above, it will not be possible to obtain the adhering water content in the desired specific state, and inevitably the above-mentioned characteristics will change. You can't expect certain effects.

In the present invention, in order to respond immediately to such a case, a sampling mechanism 31 and a moisture measuring mechanism 32 are provided for the first feeding mechanism 1 as shown in FIG.
The sampling mechanism 31 is inserted into the flow of material continuously flowing down from the cylinder to collect a predetermined amount of sample, and the measuring mechanism 32 is inserted into this sample to measure the moisture content under energization conditions, high frequency conditions, etc. Measurements are made as appropriate.

It is clear that by adjusting the valves 15V and 16V based on such measured values, the technique described above can be rationally adopted.

Of course, the sand or the like introduced by the conveyor 11 may be subjected to a process to equalize its water content by using centrifugal force conditions, ventilation conditions, or the like.

In the above-mentioned device, the first mixing process (2) is formed between the first feeding mechanism 1 and the second feeding mechanism 2, and the time between the second feeding mechanism 2 and the third feeding mechanism 3 is As shown in FIG. 1, the space between the third feeding mechanism 3 and the discharge port 9 forms the second mixing process (2), and the third mixing process (2) forms the space between the third input mechanism 3 and the discharge port 9.

That is, to explain this in the case of preparing a cement-based mixture such as mortar or concrete as described above, in the first mixing process (■), a part of the water necessary for the final mixture is absorbed from the input material such as sand. It is added through the pipe 15 and mixed by the screw mechanism 4 to make the water uniform.

In this way, the second
Cement powder is quantitatively added from the feeding mechanism 2 and mixed by the screw mechanism 4 in the same manner, thereby forming a second mixing process in which the cement powder is evenly deposited on the surface of the sand grains.

In the third mixing process, in the case of mortar adjustment, it is sufficient to simply add and mix the remaining amount of water, but in the case of obtaining ready-mixed concrete, coarse aggregate such as gravel is further quantitatively cut out from the third feeding mechanism 3. It is loaded via mechanism 12.

However, regarding the addition of such coarse aggregate, as shown in Fig. 5, it is added to hopper 3a together with fine aggregate from hopper 1a.
The water may be added on the conveyor 11, and in this case, it is sufficient to simply add water from the branch pipe 16.

In this third mixing step, one or more additives to adjust the reaction conditions or mixing conditions in the mixture, such as a dispersant, quick setting agent, and retarder, are added from the admixture tank 17.

Regarding the addition of such additives, the additives can be added at the same time as the water is added as shown in Figure 1, or they can be added into the water and then added to the mixture as shown in Figure 5. In the case of the additive shown in Fig. 5, even a substance with a relatively high viscosity can be added evenly because the additive is dispersed in a relatively large amount of water and then mixed.

In FIG. 5 described above, the pressurizing mechanism chamber 6 as described above is shown.
A method is shown in which a tube 8 is further used as a pressurizing means.

This tube 8 is inserted into the pressurizing mechanism chamber 6 as shown in FIG.
However, as shown in FIG. 7, a plurality of them can be installed in parallel.

If the tube 8 is used in this way, it is clear that there is no need to maintain sufficient airtightness in the pressurizing mechanism chamber 6 itself, and the tube that requires airtightness due to friction with the screw mechanism 4 is also obvious. 8 will not be damaged.

Of course, in addition to gas, a liquid such as water can be sealed in this tube 8, and the pressure of this liquid also varies depending on the pressure of this tube 8.
This can be easily adjusted by simply changing the height position of the water supply source (e.g. tank or cistern) relative to the conduit connected to it.

As an example, a rubber pipe or a synthetic resin pipe is adopted as the above-mentioned conduit, and this is connected to a bucket-like container as a water supply source, and the set height of this bucket-like container is set at a height of 1.5 to 2 m from the mixing mechanism part. By setting the tube in this position and applying pressure due to the head difference to the inside of the tube 8, the process of mixing mortar or concrete as in the embodiment described later can be carried out smoothly.

The tube as described above is also provided with an elastic membrane piece 5 in series from the screw mechanism 4 to the upper part as shown in FIG. The tube 28 inside the pressurizing mechanism chamber 26 can be installed as a tube 28, and the tube 28 in the pressurizing mechanism chamber 26 reinforces the action at the bottom as described above.

Moreover, such a tube 28 acts on the entire elastic membrane piece 5 mounted in a U-shape as described above, and especially under conditions where the elastic membrane piece 5 is slightly aged or stretched. can be corrected to form a preferable sealing relationship with the peripheral edge of the screw mechanism 4.

Note that the outlet 9 formed at one end of the mixing chamber 10 may be formed on the side of the mixing chamber 10, as shown in FIG.

The outlet 9 formed on the side in this way fills the mixed material up to the end portion of the mixing chamber 10, and even in the case of a mixed material with considerable fluidity, the entire mixing chamber can be used as an effective mixing area. make it possible.

Even if the discharge port is formed on the side surface of the mixing chamber, there is almost no problem in receiving the mixture in the receiver 20.

FIGS. 8 and 9 show still another mechanism according to the present invention, that is, in the above-mentioned structures up to FIG. 7, an integrated structure is used as the housing body 10.
The present invention may be practiced using a plurality of housing bodies as shown in FIGS. 8 and 9, depending on the case.

In the case of the lid shown in FIG. 8, the housing parts 10a, 10b,
10c are arranged in multiple stages, and the first accommodating body 10a is provided with the above-mentioned first charging means 1 and water supply means 21, and the first charging means 1 is equipped with a moisture measuring means 22. The water content of the granular material is measured, and the amount of water supplied from the water supply means 21 is controlled based on the measurement result.

The second storage body 10b is provided with a hopper 10b' at one end for receiving the material discharged from the outlet of the first storage body 1, and furthermore, the second storage body 10b is provided with a hopper 10b' for receiving the material discharged from the outlet of the first storage body 1. Materials will be input.

A hopper 10c' of the third accommodating body 10c is provided below the outlet on the other end side of the second accommodating body 10b, and a water supply means 23 is separately provided for such hopper 10c'. As shown in the figure, a discharge pipe 24 provided below the other end of the third accommodating body 10c discharges the mixture into the receiver 20.

However, in the structure as described above, the first accommodating body 10a is provided with a screw mechanism 4 and the screw mechanism 4 is driven by the motor M1, but the second accommodating body 1
A screw mechanism 4a is fixed to the inner surface of 0b, and the second accommodating body 10b is rotatably provided with respect to the hopper 10b' and the support seat, and a gear 34 is attached to a part of its outer periphery to drive a motor. Rotate the accommodating body 10b itself with M2.

In the third accommodating body 10c, a rotating shaft 35 driven by a motor M3 is horizontally mounted, and a stirring plate 36 disposed on the rotating shaft 35 performs stirring and mixing. By appropriately selecting the angle, three-dimensional stirring is performed within the housing body 10c.

In contrast to the one shown in FIG. 8 described above, in the one shown in FIG. , 4c are driven by a motor M4 at one end, but the second and third housing bodies 10b and 10c are also driven by motors M2 and M3, respectively, and the above-mentioned Screw mechanism 4b, 4
It is designed to drive in the opposite direction to c to achieve efficient mixing.

Furthermore, even under such conditions that the second and third accommodating bodies 10b and 10c are rotated, at least the secondary water supply means 23 in the one shown in FIG. The rotating shaft corresponding to the third accommodating body 10c is cylindrical, and water is supplied from the water supply means 33 provided at the other end through the cylindrical rotating shaft to the water supply hole 33a at one end of the third accommodating body. This is something that has been done since then.

However, as shown in FIGS. 8 and 9, having a plurality of accommodating bodies complicates the structure in terms of illustration, but as mentioned above, by adding and mixing materials in multiple stages, it is possible to It is clear that the volume of the material changes, and the apparent volume also changes depending on the amount of water at each stage. It is possible to employ housing bodies 10a, 10b, and 10c that correspond to the volume of the process.

Further, in the mixing process, it is possible to employ specifically preferable mixing means, such as the stirring plate 36 shown in FIG. 8, as an example, and the stirring and mixing efficiency can be improved in any case.

Specific embodiments of the method of the present invention will be described below.

Example 1 As an apparatus as shown in Figs. 1 to 4, the mixing chamber diameter is 350 mm.
mm, and the length is 4000 mm, and the screw mechanism 4 is operated at a rotational speed of 70 rpm,
The mortar was adjusted without charging gravel from the third charging mechanism 3.

On the other hand, for the first input mechanism 1, prior to the conveyor 11, the present inventors proposed the first patent application for the bag in 1982.
8266 "Moisture adjustment method and device for fine-grained materials such as sand" mechanically performs water adhesion adjustment treatment on the surface of sand, and river sand is adjusted to have an adhesion water content of 3.8 to 4.2%. The water was charged at a rate of 60 kg/min, and water was sprinkled at an average rate of 7.02 l/min from the water sprinkler pipe 15, and mixed to adjust the surface water to a range of 15.9 to 16.5%. Portland cement is added from the second charging mechanism 2 at a rate of 40 kg/min to form a shell by continuously mixing it.
was set at around 24%.

Once the shell is formed in this way, 6 liters of water is added through the branch pipe 16.
/min while adding and mixing a lignin sulfonic acid admixture at a rate of 0.35 l/min to prepare the desired mortar with a water-cement ratio W/C of 39% and a cement-sand ratio C/S of 1: 1.5 were obtained continuously at a rate of 3 m3/h.

This mortar fluidity is 0.65g/cm3 for Fo, 0.32g・sec/cm4 for λ, and 0.0035g for ΔFo.
/cm4, with no separation or breathing observed at all, and the 3-day strength of the molded object made from this mortar is 412 Kg/m2, and the 7-day strength is 483.
Kg/cm2, 28-day compressive strength was 736 Kg/cm2, and bending strength was 94 Kg/cm2.

In the case of the above embodiment, the mixing amount was relatively small, and the above-mentioned mixing was performed within a height range of about 10 to 12 cm from the bottom of the mixing chamber.

Example 2 The mixing chamber diameter and length of the apparatus shown in FIG. 5 were the same as in Example 1, and the screw mechanism was operated at a rotational speed of 70 rpm.
232Kg of river sand with adjusted water landing in the same way as in
/min at the same time as charging from hoppers 3a to 41.
Charge 2Kg/min of gravel and install water pipe 15 into this thing.
Water was sprinkled at a rate of 11.25 l/min to adjust the aggregate surface water to 11.6 to 12.6%, and the second feeding mechanism Add cement from 2 at 115Kg/min and mix, W/C
A shell layer with a content of about 24% was formed.

For the above, further branch pipe 16 to 18.6 l/
min of water and 1.13 l of the same dispersant as in Example 1.
/min and continued mixing, W/C is about 42%, C/S is 1:2, and the ratio of sand and gravel S/G is 1.
:20m3 of fresh concrete with a mixing ratio of 1.78/
It was obtained continuously at a rate of hr.

The slump value of this fresh concrete is 12 cm without separation or breathing, and the compressive strength after 3 days of the molded body obtained from this fresh concrete is 254 kg/m2, 7
348Kg/cm2 after 2 days, 442Kg/m2 after 28 days
2, a preferable concrete could be obtained.

Example 3 The experiment was carried out using the apparatus shown in FIG. 8 described above.

In other words, artificial lightweight fine aggregate with a surface water content of approximately 8% (specific gravity 1
．． 4) and artificial lightweight coarse aggregate (specific gravity 1.6) with a diameter of about 15 mm and a surface water content of about 1%, and the fine aggregate
Coarse aggregate is fed into hopper 1 at a rate of 59 kg/min, and coarse aggregate is fed into hopper 1 at a rate of 181 kg/min.
and 11 l/mi from tank 21 to these items.
Sprinkle and add water at a ratio of n to bring the surface water content of the fine aggregate to 1.
It was attached so that it was 5%.

For this item, add 117% cement powder from hopper 2.
After adding and mixing at a rate of Kg/min to form a shell of cement on the surface of the aggregate (fine aggregate and coarse aggregate), 31 l/min of water and 6 l/min of naphthalene sulfonate system were added from tank 23. A water reducing agent was added and kneaded.

The resulting concrete had a slump of 15 cm and good fluidity, with almost no separation or breathing.
The composition is 350Kg/m3 of cement and 480Kg/m3 of sand.
Kg/m3, gravel 545Kg/m3, water 162L/
m3, water reducing agent is about 18l/m3, W/C is 4
6%, and the coarse aggregate ratio is approximately 50%, and the strength of the molded body obtained with this concrete is 216 kg/cm in 7 days.
2 and 28 days, 386 Kg/cm2, and these values are sufficiently high strength when compared to 173 Kg/cm2 at 7 days and 331 Kg/cm2 at 28 days in the case of a comparative example with the same composition according to the conventional method. It was confirmed that it was.

Example 4 This was carried out using the apparatus shown in FIG.

That is, prepare sand of 5 mm or less with a surface water content of 6% and gravel of 25 mm with a surface water content of 1%, and
0Kg/min, gravel is charged into the mixing chamber from hopper 1 at a rate of 348Kg/min, and then from tanks 21 to 8.
After adding water at a rate of l/min to adjust the surface water content of the sand to 9%, 117 kg of cement powder was added from hopper 2.
A cement shell was formed on the surface of the sand and gravel by adding and mixing at a rate of /min.

Next, the hopper 33 added water at a rate of 31 l/min and a ligninsulfonic acid water reducing agent at a rate of 6 l/min through the supply hole 33a, and kneaded the mixture.

The concrete obtained in receiving tank 20 has a slump of 17 cm.
It was also confirmed that no separation or breathing was observed, and the concrete had good fluidity, and the mixing ratio of cement in this concrete was 350 kg/m2.
3. Sand is 780Kg/m3, gravel is 1043Kg/m3
The water content was 162 l/m3, the water reducing agent was 18 l/m3, and the water-cement ratio was approximately 46%.

However, the compressive strength of the molded body made from this concrete after 7 days was 224 kg/cm2, and after 28 days it was 4 kg/cm2.
03Kg/cm2, and using this as a comparative example, the strength after 7 days of a concrete molded body adjusted for crosstalk according to the conventional method so that it has exactly the same composition as the above-mentioned mixture composition is 183Kg/cm2.
Kg/cm2, and the strength after 28 days was 348 Kg/cm2, and it was confirmed that the strength was significantly increased both after 7 days and after 28 days.

When using the method of the present invention as explained above, particles such as sand are added and a portion of the water to be added and mixed finally is added to maintain a constant amount of water to be attached to the particles. A first mixing process in which a powder such as cement is added to the mixture that has gone through this first mixing process and mixing is continued; Since this process consists of a third mixing process in which the remaining water to be added is added and mixing is continued, a specific amount of water is uniformly attached to fine aggregate such as sand in the first mixing process. In this way, a strong and stable shell coating is formed by adding and mixing powder such as cement in the second mixing process to the material with a specific amount of water uniformly attached. If the shell-forming film does not peel off during the water addition and kneading operations in the subsequent third mixing process, the resulting kneaded product through the third mixing process will have a progressively new kneading process in which separation breathing is completely eliminated. Furthermore, the kneaded product can be used to obtain an advantageous product having excellent strength properties and other properties, and when mixing these, the elastic membrane piece stretched over the housing body is Each of the above mixing steps is performed while substantially preventing the moisture added in at least the third mixing step from entering the first or second mixing step portion due to the elastic action energized by the screw mechanism and the sliding contact with the periphery of the screw mechanism. Because the process is carried out, even if the added liquid is continuously mixed, each process described above can be carried out accurately without entering the preceding or subsequent process, and furthermore, it is possible to carry out the kneading process. It has effects such as being able to perform post-treatment cleaning easily and effectively.

Further, when using the apparatus of the present invention, the method of the present invention as described above can be carried out accurately, and a pressurizing chamber for pressurizing the elastic membrane piece into the mixing chamber is formed on the outer surface of the elastic membrane piece. It is possible to effectively achieve a sealing effect between each mixing process, thereby appropriately obtaining a kneaded material having the above-mentioned characteristics, and both of them have great industrial effects. It is an invention.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a longitudinal sectional view of one embodiment of the device according to the invention, FIG. 2 is a partially cutaway side view thereof, and FIG. 3 is a cross-sectional side view thereof. ,
FIG. 4 is a perspective view of the pressurizing mechanism chamber portion, FIG. 5 is a vertical cross-sectional side view similar to FIG. 1 of another embodiment of the present invention, FIG. 6 is a cross-sectional side view thereof, and FIG. A cross-sectional side view showing a partial modification of the bottom part, FIG. 8 is a vertical cross-sectional view of yet another multi-stage embodiment of the present invention, and FIG. 9 is a vertical cross-sectional view of another embodiment. It is. However, in these drawings, 1, 2.3 are husband's first to
3rd material input mechanism, 4 and 4a are screw mechanisms, 5 is an elastic membrane piece, 6 is a pressurizing mechanism chamber, 7 is an open part of the housing body, 8 is a tube, 9 is an outlet, 10 is a housing body , 10a, 10
b, 10c are divided storage parts, 11 is a conveyor, 1
2 and 13 are quantitative cutting mechanisms, 14 are tanks, 15 are piping,
16 is a branch pipe, 17 is an admixture tank, 19 is a cushioning material, 20 is a receiver, 21 is a water supply means, 22 is a moisture measuring means, 26 is a pressurizing mechanism chamber formed in the upper part of the screw mechanism part, 28 is a The chip, 31, is the sampling mechanism, 3
2 is its moisture measuring mechanism, 34 is a gear, 35 is a rotating shaft, 3
6 is a stirring plate, and M, M1, M2, M3 and M4 are motors, respectively.

Claims (1)

[Claims] 1. A first method in which particles such as sand are introduced and a part of the moisture to be finally added and mixed is added to keep the amount of moisture to be attached to the particles constant. a mixing process;
A second mixing process is performed in which a powder such as cement is added to the mixture that has gone through the first mixing process and mixing is continued, and the remaining water that is to be added is added to the mixture that has gone through the second mixing process. Furthermore, it consists of a third mixing process in which mixing is continued, and at least in the third mixing process, due to the elastic action of the tensioned elastic membrane piece of the housing body that is urged in the direction inside the mechanism and the sliding contact with the periphery of the screw mechanism. A continuous mixing method characterized in that each of the above mixing processes is performed while substantially preventing added water from entering the first or second mixing process section. 2. Claim 1: In the second mixing process, the excess powder added to the particles is separated by the three-dimensional air flow effect obtained between the elastic membrane piece and the periphery of the rotating screw mechanism. Continuous mixing method as described in Section. 3. The continuous mixing method according to claim 1, wherein gravel and other coarse particles are added in the third mixing step. 4 Claim 1 in which one or more additives to adjust the reaction conditions or mixing conditions in the mixture, such as a dispersant, an accelerating agent, and a retarder, are added in the third mixing process.
Continuous mixing method as described in Section. 5. An elastic membrane piece is provided on the bottom surface of the cylindrical accommodating body in which the screw mechanism is installed horizontally, and a pressurizing mechanism chamber is formed on the outer surface of the elastic membrane piece for pressurizing the elastic membrane piece into the mixing chamber, An open part is formed on the top surface of the accommodating body, and first to third mixing processes are formed from one end side to the other end of the accommodating body, and a plurality of mixtures to be mixed in each of the mixing processes are formed. Addition mechanisms for sequentially adding the materials are provided in stages, each of these addition mechanisms is provided with fixed quantity supply means, and a discharge port is formed at the other end of the storage body. Continuous mixing equipment. 6. The continuous mixing device according to claim 5, wherein the elastic membrane piece and the pressurizing mechanism chamber are each divided into a plurality of parts. 7. The continuous mixing device according to claim 5, wherein a fluid consisting of either gas or liquid or both is applied to the pressurizing mechanism chamber. 8. The continuous mixing device according to claim 5, wherein a part or all of the pressurizing mechanism chamber is filled with sponge rubber or a cushioning material similar thereto. 9. The continuous mixing device according to claim 5, wherein a tube is installed in part or all of the pressurizing mechanism chamber, and a fluid consisting of either gas or liquid or both is sealed in the tube. 10 Lay out each housing body in stages. Claim 5, wherein the charging port of the rear storage body is located with respect to the discharge port of the front storage body, and a drive mechanism for each of the storage bodies or the mixing mechanism is provided for each of the storage bodies. Continuous mixing equipment as described.