JP3988974B2 - Concrete production method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concrete production method, in particular, a concrete production method using waste containing waste paper, waste pulp as part of sludge, stone powder, incinerated ash, ceramic powder, glass powder, on-site generated soil, etc. as aggregate. About.
[0002]
[Problems to be solved by the invention]
Conventionally, concrete has been manufactured by mixing water, cement, aggregates and various admixtures, and kneading them with a mixing device such as a mixer. As an aggregate used for manufacturing this type of concrete, Coarse aggregates such as gravel and quarry, and fine aggregates such as sand and fine sand are common.
[0003]
By the way, in recent years, most of industrial waste such as sludge, stone powder, incinerated ash, ceramic powder, glass powder, waste paper in some areas, and on-site generated soil containing waste pulp have to be disposed of for landfill. Although it cannot be obtained, environmental pollution due to a shortage of disposal sites and illegal dumping has become increasingly serious, and the treatment of such pollution is a problem. On the other hand, from the viewpoint of nature conservation and environmental protection, the collection of river sand and mountain sand used as concrete aggregate is limited, and sea sand is used as concrete aggregate because the salt content causes deterioration of concrete. Not suitable for. Therefore, the industrial waste containing waste paper and waste pulp as part of the sludge, stone powder, incineration ash, ceramic powder, glass powder, and soil generated on the site, which had to be discarded, should be used as the aggregate of concrete. In some cases, such as ceramic powder, glass powder, and soil generated in the field, waste paper and waste pulp generally have a high water content and a high water absorption rate. When stirring and mixing, the resistance becomes high, and stirring and mixing becomes difficult. For this reason, when using industrial waste containing waste paper and waste pulp as part of such sludge, stone powder, incinerated ash, ceramic powder, glass powder, and site-generated soil, the amount of water It must be increased. That is, when manufacturing this type of concrete, the ratio of water to cement is around 45-55%, but waste paper is used as part of sludge, stone powder, incinerated ash, ceramic powder, glass powder, on-site soil, etc. When industrial waste containing waste pulp is used as the aggregate of concrete, the ratio of water to cement needs to be set to about 55 to 75%. However, when the ratio of water to cement is increased in this way, it causes the occurrence of breathing and the strength and durability of the concrete. Therefore, a high-performance AE water reducing agent is added when kneading, or the amount of cement It is dealt with by increasing. For this reason, when using industrial waste containing waste paper and waste pulp as part of sludge, stone powder, incinerated ash, ceramic powder, glass powder, on-site generated soil, etc., compared to the case of producing general concrete. In terms of profit, sludge, stone powder, incinerated ash, ceramic powder, glass powder, industrial waste containing waste paper and waste pulp as part of the soil generated in the field has come to be used as concrete aggregate There is no current situation.
[0004]
The present invention solves such a problem and provides a concrete production method capable of producing a high-strength concrete structure with less cement by increasing the fluidity of the raw material when mixing the raw materials of the concrete structure. The purpose is to provide.
[0005]
[Means for Solving the Problems]
The method for producing concrete according to claim 1 of the present invention is a method for producing concrete, in which raw materials such as water, cement, aggregate, and admixture are mixed, and this is stirred and mixed to produce a concrete structure. A vibration step for vibrating the raw material during stirring and mixing of the raw material is provided. In the vibration step, internal vibration is applied to the raw material by a vibration device built in the stirring blade .
[0006]
With the above configuration, when the raw materials are vibrated during the stirring and mixing of the raw materials, the constituent particles having different masses are liquefied because the interparticle bonds are released by different inertial forces (vibration forces). Accordingly, when the raw materials are stirred and mixed, the raw material having high resistance is liquefied, and the raw materials can be reliably stirred. Thereby, since it becomes possible to suppress the ratio of water with respect to cement low, when manufacturing a concrete structure of the same strength, the amount of cement used can be suppressed.
[0007]
The method for producing concrete according to claim 2 of the present invention is a method for producing concrete, in which raw materials such as water, cement, aggregate, and admixture are blended, and this is stirred and mixed to produce a concrete structure. Provide a vibration process to vibrate the raw material during stirring and mixing of the raw material,
In the vibration step, internal vibration of 10000 to 15000 VPM is added to the raw material by a vibration device built in the stirring blade .
[0008]
With the above configuration, when the raw materials are vibrated during the stirring and mixing of the raw materials, the constituent particles having different masses are liquefied because the interparticle bonds are released by different inertial forces (vibration forces). Accordingly, when the raw materials are stirred and mixed, the raw material having high resistance is liquefied, and the raw materials can be reliably stirred. Thereby, since it becomes possible to suppress the ratio of water with respect to cement low, when manufacturing a concrete structure of the same strength, the amount of cement used can be suppressed.
[0009]
In the method for producing concrete according to claim 3 of the present invention, the aggregate is constituted by industrial waste containing waste paper, waste pulp in part of sludge, stone powder, incinerated ash, ceramic powder, glass powder, on-site generated soil, etc. Is.
[0010]
Due to the above configuration, on-site generated soil containing sludge, stone powder, incinerated ash, ceramic powder, glass powder, some waste paper, and waste pulp generally has a high water content and a high water absorption rate. Although the resistance is increased, the fluidity of the raw material can be increased without increasing the amount of water when the raw material is vibrated during the stirring and mixing of the raw material without increasing the amount of water.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show a first embodiment of the present invention, in which a concrete structure 1 is blended with water, cement, aggregate and mixed material as raw material A and mixed with a mixer or the like. It is manufactured by stirring and mixing in the device 2, but as the aggregate 3 of the concrete structure 1, conventionally sludge, stone powder, incinerated ash, ceramic powder, glass powder, some waste paper, waste Reuse of soil generated in the field including pulp.
[0012]
As shown in the cross-sectional view of FIG. 1, the mixing device 2 includes a bottomed cylindrical container 4 into which a forming raw material A of a concrete structure 1 is charged, a base 4A that supports the container 4, and the base. The rotating shaft 5 is rotatably supported by 4A, a driving device 6 such as a motor for rotating the rotating shaft 5, and a plurality of stirring blades 7 fixed to the tip of the rotating shaft 5 serving as a stirring device. The stirring blade 7 includes a vibration device 8 that vibrates the raw material A in part. That is, as shown in FIG. 2, in this embodiment, six stirring blades 7 are fixed to the rotating shaft 5, but three of the stirring blades 7A have a vibration device 8 incorporated therein. Yes. The stirring blades 7A and the stirring blades 7 provided with the vibration device 8 are alternately arranged, and the raw material A of the concrete structure 1 put into the container 4 is stirred and mixed by the rotation of the stirring blades 7 and 7A. . And the vibration of the internal vibration 10000-15000VPM (about 167-250Hz) is added to the raw material A with the vibration apparatus 8 incorporated in the inside of the stirring blade 7A. Thus, by applying high-frequency vibration to the raw material A by the vibration device 8 built in the stirring blade 7A, the constituent particles of the raw material A having different masses are liquefied because the interparticle bonds are released by different inertial forces (vibration forces). The fluidity of the raw material A is improved. For this reason, the raw material A can be reliably stirred and mixed by the stirring blades 7, 7 </ b> A, and the raw material A thus stirred and mixed is discharged from the discharge hole 9 formed at the bottom of the container 4. The discharge hole 9 is provided with an open / close shutter and a discharge chute (not shown).
[0013]
As described above, in this embodiment, water, cement, aggregate 3 and mixed material are mixed, and this is stirred and mixed (mixed) by the mixing device 2 to produce the concrete structure 1. The aggregate 3 recycles sludge, stone powder, incinerated ash, ceramic powder, glass powder, on-site generated soil containing some waste paper, waste pulp, etc., discarded as industrial waste. Since these aggregates 3 generally have a high water content and a high water absorption rate, they have high resistance during stirring and mixing and extremely poor fluidity. Therefore, this kind of general water-cement ratio (approximately 50%) %), It becomes difficult to stir and mix. However, in this embodiment, water, cement, aggregate 3, and mixed material introduced into the mixing device 2 are incorporated into the vibration device 8 into the stirring blade 7 </ b> A of the mixing device 2 that mixes the raw material A of the concrete structure 1. raw materials a consisting of, it is possible to liquefy a raw material a by giving high frequency vibration of the internal vibration 10000～15000VPM (approximately 167~250Hz). That is, gaps and bubbles between water, cement, aggregate 3 and mixed material are removed, and the fluidity of the raw material A is improved. Thereby, it becomes possible to mix very smoothly by the stirring blades 7 and 7A. Therefore, conventionally, in this type of hydraulic cement, various fluid additives such as expensive high-performance AE water reducing agents are added, or the mixing ratio of water is increased to ensure a predetermined fluidity. In the embodiment, by incorporating the vibration device 8 into the mixing device 2 that mixes the raw material A of the concrete structure 1, the flowability of the concrete can be easily and easily simply by giving a high frequency vibration to the raw material A input to the mixing device 2. It is possible to increase. Moreover, since the aggregate 3 is mixed evenly by applying vibration, the density of the concrete structure 1 is also improved, and the strength of the concrete structure 1 manufactured through the stirring and mixing process and the vibration process is also improved. Thereby, when manufacturing the concrete structure 1 of the same strength, the amount of cement used is reduced, so that the manufacturing cost of the concrete structure 1 can be reduced at a low cost.
[0014]
Moreover, in this embodiment, by incorporating the vibration device 8 inside the stirring blade 7A, the raw material A can be effectively vibrated while stirring the raw material A of the concrete structure 1 with the stirring blades 7 and 7A.
[0015]
As described above, in this embodiment, the vibration device 8 is provided in the stirring blade 7A of the mixing device 2, so that water, cement, aggregate 3, and mixed material that are the raw material A of the concrete structure 1 in the mixing device 2 are used. By applying vibration, the water, cement, aggregate 3 and mixed material can be liquefied to improve fluidity. For this reason, it is excellent as if the industrial waste containing waste paper and waste pulp was used as a part of sludge, stone powder, incinerated ash, ceramic powder, glass powder, field generated soil, etc. Therefore, it is not necessary to add an expensive mixed additive such as an expensive high-performance AE water reducing agent, and the ratio of water to cement can be reduced. As a result, even if an industrial waste containing waste paper or waste pulp is used as a part of sludge, stone powder, incinerated ash, ceramic powder, glass powder, on-site generated soil, etc., the ratio of water to cement is 20-30. %, That is, it can approach the theoretical water / cement ratio as much as possible. This is because the raw material A of the concrete structure 1 that has been agitated and mixed is liquefied by causing the mixing device 2 to vibrate while mixing the water, cement, aggregate 3 and mixed material that are the raw material A of the concrete structure 1 with vibration. In general, the aggregate used in the manufacture of concrete is 50% even when coarse aggregate such as gravel and quarry and fine aggregate such as sand and fine sand are used. Compared with the manufacture of a concrete concrete structure 1, the amount of water can be almost halved. Furthermore, by applying vibration, air bubbles and gaps between the raw materials A are removed, the aggregate 3 is mixed evenly, and the density of the concrete structure 1 is also improved, so the strength of the concrete structure 1 is improved. Can be made.
[0016]
In addition, by incorporating the vibration device 8 into the mixing device 2, it is possible to stir and mix water, cement, aggregate 3, and the mixed material as raw materials A of the concrete structure 1, so that the aggregate 3 can be sludge, stone powder, Even if incinerated ash, ceramic powder, glass powder, industrial waste including waste paper and waste pulp is used for some of the soil generated on the site, usually gravel, quarrying, etc. used in the production of this type of concrete The raw material A of the concrete structure 1 can be effectively mixed without any change from the case of using coarse aggregate and fine aggregate such as sand and fine sand. In addition, even when not using industrial waste including waste paper and waste pulp as part of sludge, stone powder, incinerated ash, ceramic powder, glass powder, and soil generated on site as the aggregate 3, Since the raw material A can be liquefied by applying high-frequency vibrations to the raw material A of the structure 1, even when coarse aggregates such as gravel and quarry and fine aggregates such as sand and fine sand are used. If the mixing device 2 of this embodiment is used, it is possible to reduce the amount of water relative to the cement and to reduce the amount of cement used, and thus it is possible to manufacture the concrete structure 1 at a low cost. It becomes.
[0017]
FIG. 3 shows a second embodiment of the present invention, where parts having the same functions as those of the first embodiment are denoted by the same reference numerals, description of overlapping parts is omitted, and only different parts will be described. In the above embodiment, an example in which the vibration function 8 is incorporated in a part of the stirring blade 7A of the mixing device 2 is shown. However, in this embodiment, the shaft-shaped vibration device 10 having a separate structure from the mixing device 2 is provided. The vibration device 11 is built in the vibration device 10.
[0018]
In the present embodiment configured as described above, water, cement, aggregate 3 and mixed material, which are the raw material A of the concrete structure 1, are put into the container 4 of the mixing device 2 and then the raw material A is vibrated. When the apparatus 10 is inserted and the raw material A is vibrated by the vibrating body 11 built in the vibration apparatus 10, the fluidity can be improved by liquefying as in the first embodiment. For this reason, it is possible to obtain excellent fluidity even when using on-site generated soil containing ceramic powder, glass powder, some waste paper, and waste pulp discarded as industrial waste. It is not necessary to add an expensive mixed additive such as an AE water reducing agent, and since the ratio of water to cement can be suppressed to a low level, when the concrete structure 1 having the same strength is manufactured, the amount of cement used is also small. Therefore, the manufacturing cost of the concrete structure 1 can be suppressed at a low cost.
[0019]
While the embodiments of the present invention have been described and described above, the present embodiment is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, as the structure of the mixing device 2, in the first embodiment, an example in which the mixing device 2 is incorporated inside the stirring blade is shown, and in the second embodiment, an example in which the vibrating rod 11 is provided separately from the mixing device 2 is shown. As in the third embodiment of the present invention shown in FIG. 4, the vibration device 15 is attached to the bottom of the container 4 of the mixing device 2, and the container 4 is vibrated as a whole by the vibration device 15 and inserted into the inside. You may comprise so that a vibration may be added to the raw material A of the concrete structure 1. FIG. Thus, if the container 4 is configured to vibrate as a whole, the raw material A of the concrete structure 1 can be more effectively vibrated. Further, as in the fourth embodiment of the present invention shown in FIG. 5, the vibration device 20 includes an eccentric shaft 23 in which a notch groove 22 is formed in a part of the shaft 21, and the concrete structure is formed by the rotation of the eccentric shaft 22. One raw material A may be vibrated. Such an eccentric shaft 22 is rotatably incorporated into the stirring blade 7A, for example, as in the first embodiment, or directly inserted into the container 4 as in the second embodiment. It is possible to apply vibration to the raw material A of the concrete structure 1. Thus, the structure of the vibration device may be a structure that can impart vibration to the raw material A of the concrete structure 1 put into the mixing container 2, and when the vibration device is incorporated in the mixing container 2, the mixing container 2 It is possible to attach to the outside of the side, the bottom or the inner surface of the mixing container 2. Moreover, what is necessary is just to select suitably the mixture ratios, such as the water used as the raw material A of the said concrete structure, cement, and an aggregate, according to the use and objective of a concrete structure.
[0020]
【The invention's effect】
According to the method for producing concrete of claim 1 of the present invention, a concrete production method for producing a concrete structure by mixing raw materials such as water, cement, aggregate, and a mixture, and stirring and mixing them. A vibration step for vibrating the raw material during stirring and mixing of the raw material, and internal vibration is applied to the raw material by a vibration device built in the stirring blade in the vibration step. These raw materials can be liquefied by vibrating. Thus, when the raw materials are stirred and mixed, even if the resistance of the raw materials is high, the raw materials can be reliably stirred, and the ratio of water to cement can be kept low. When manufacturing a concrete structure, the amount of cement used can be reduced.
[0021]
According to the concrete production method of claim 2 of the present invention, there is provided a concrete production method in which raw materials such as water, cement, aggregate, and a mixture are blended, and this is stirred and mixed to produce a concrete structure. In addition, a vibration process for vibrating the raw material during stirring and mixing of the raw material is provided, and in the vibration process, an internal vibration of 10000 to 15000 VPM is added to the raw material by a vibration device built in a stirring blade. These raw materials can be liquefied by vibrating the raw materials of the body. Thus, when the raw materials are stirred and mixed, even if the resistance of the raw materials is high, the raw materials can be reliably stirred, and the ratio of water to cement can be kept low. When manufacturing a concrete structure, the amount of cement used can be reduced.
[0022]
According to the method for producing concrete according to claim 3 of the present invention, the aggregate is an industrial waste containing sludge, stone powder, incinerated ash, ceramic powder, glass powder, on-site generated soil, etc. Therefore, industrial waste containing waste paper and waste pulp as part of the sludge, stone powder, incineration ash, ceramic powder, glass powder, on-site soil, etc. that could only be treated by landfill, etc. has been recycled as concrete aggregate. Industrial waste containing sludge, stone powder, incineration ash, ceramic powder, glass powder, waste paper and waste paper in some parts of the soil generated on the site, which can be used and difficult to reuse as aggregate And the cement can be reliably stirred and mixed, and the production cost can be kept low.
[Brief description of the drawings]
FIG. 1 is a plan view of a mixing apparatus showing a first embodiment of the present invention.
2 is a cross-sectional view taken along the line aa in FIG.
FIG. 3 is a cross-sectional view of a mixing apparatus showing a second embodiment of the present invention.
FIG. 4 is a cross-sectional view of a mixing apparatus showing a third embodiment of the present invention.
FIG. 5 is an exploded perspective view of a stirring blade showing a fourth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Concrete structure 2 Mixing device 3 Aggregate 4 Container 7, 7A Stirring blade 8, 15, 20 Vibrating device

Claims (3)

A concrete production method for producing a concrete structure by mixing raw materials such as water, cement, aggregate and a mixture, and stirring and mixing the raw materials, and a vibration step of vibrating the raw materials during the stirring and mixing of the raw materials Provided,
A method for producing concrete, wherein in the vibration step, internal vibration is applied to the raw material by a vibration device built in a stirring blade . A concrete production method for producing a concrete structure by mixing raw materials such as water, cement, aggregate and a mixture, and stirring and mixing the raw materials, and a vibration step of vibrating the raw materials during the stirring and mixing of the raw materials Provided,
In the vibration step, a concrete manufacturing method characterized in that internal vibration of 10000 to 15000 VPM is applied to the raw material by a vibration device built in a stirring blade . The concrete according to claim 1 or 2, wherein the aggregate is an industrial waste containing sludge, stone powder, incineration ash, ceramic powder, glass powder, waste paper and waste pulp in a part of on-site generated soil. Manufacturing method.

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