JP6414748B2 - Kit for plastic injection material, plastic injection material, method for manufacturing plastic injection material, and method for applying plastic injection material - Google Patents

Description

  The present invention relates to a plastic injection material, a method for manufacturing a plastic injection material, and a construction method for a plastic injection material.

An injection material containing cement is known as an injection material to be constructed by being injected into voids or cavities of the ground, concrete structures, and the like. In order to prevent the injection material from leaking to the surroundings until it is injected into the target construction site such as voids and cavities and cured, it has sufficient fluidity until construction and the surroundings after construction. It is required to have a property of agglomerating in a gel form so as not to flow, that is, plasticity.
As an injection material having such plasticity (hereinafter also referred to as a plastic injection material), for example, there is a material containing a plasticizing material as described in Patent Document 1.
The plastic injection material described in Patent Document 1 contains cement milk and bentonite as a plasticizing material. Since bentonite has swelling properties, when mixed with cement milk, it is swollen by moisture in the cement milk, and plasticity can be imparted to the cement milk.

However, since such a plastic injection material uses cement as a hardening material, there is a possibility that the cement may harden in the hose or the like at the time of injection or when pumped to the construction site.
Therefore, Patent Documents 2 to 4 describe that a latent hydraulic material is used as a hardener instead of cement.
The latent hydraulic materials described in Patent Documents 2 to 4 do not exhibit hydraulic properties by themselves, such as blast furnace slag and pozzolanic powder, but accelerate the hardening of the latent hydraulic materials in the presence of water. It means a material that exhibits hydraulic properties when in contact with a curing aid. Since such a latent hydraulic material does not easily increase in viscosity until it comes into contact with the curing aid, a mixture including the latent hydraulic material, the plasticizer, and water and a mixture including the curing aid and water are separately provided. By pumping to the vicinity of the construction site with a pump through a hose, mixing each component in the vicinity of the construction site, and injecting it into the construction site, it is possible to prevent the inside of the hose from being clogged with the mixture and to be plastic at the desired construction site. An injection material can be cast.
Thus, the plastic injection material prepared by mixing separately from the mixture containing the latent hydraulic material, the plasticizing material and water and the mixture containing the curing aid and water is a two-part plastic injection. It is called a material.

JP 11-310779 A JP 2005-281586 A JP 2001-302324 A JP 2007-45657 A

By the way, recently, a plastic injection material having a low flow value is required immediately after mixing a latent hydraulic material, a plasticizing material, and a mixture containing water, a curing aid, and a mixture containing water. There is.
Each mixture usually increases in viscosity as the number of days elapses from the time of preparation. When the time required for construction is several days or more, each mixture will be held in the hose etc., but the viscosity of each component will increase, making it difficult to pump over long distances, What is difficult to increase in viscosity is required.
The inventors of the present invention have intensively studied to produce a plastic injection material that satisfies the above-mentioned requirements for the flow value and the above-mentioned requirements for the viscosity. As a result, the amount of plasticizing material used in the conventional plastic injection materials is increased. Thus, even if the above-mentioned requirements for plasticity could be satisfied, the viscosity of the mixture containing the plasticizer increased with the increase in the plasticizer, and both of the requirements could not be satisfied.

Then, in view of the said request point, this invention makes it a subject to provide the plastic injection material which can suppress the increase in the viscosity of each mixture, reducing the flow value immediately after preparation.
Moreover, this invention makes it a subject to provide the manufacturing method of the plastic injection material which manufactures such a plastic injection material.
Furthermore, this invention makes it a subject to provide the construction method of the plastic injection material which constructs such a plastic injection material.

  The inventors of the present invention have made extensive studies and have found that a mixture containing a latent hydraulic material and water, a mixture containing a latent hydraulic material and water, and a mixture containing a plasticizing material and water, not a mixture containing a latent hydraulic material, a plasticizer, and water. Divided into three-component plastic injection material, one liquid more than the so-called two-component plastic injection material, using attapulgite as the plasticizing material, and further to a mixture containing attapulgite and water as the plasticizing material, Including the phosphate-based admixture has found that the flow value immediately after the production of the plastic injection material to be obtained is reduced, and that the increase in the viscosity of each mixture can be suppressed, and the present invention is completed. It came.

  That is, the plastic injection material of the present invention comprises a first mixture containing a latent hydraulic material and water, a second mixture containing attapulgite, a phosphate admixture and water, and the latent hydraulic material. A curing aid that can be cured and a third mixture containing water are mixed.

  As an aspect of the plastic injection material of the present invention, the second mixture may contain 0.5 to 3.0 parts by mass of the phosphate admixture with respect to 100 parts by mass of the attapulgite.

  Moreover, as one aspect | mode of the plastic injection material of this invention, the said phosphate type admixture can contain tetrapolyphosphate.

  Further, the method for producing a plastic injection material of the present invention comprises the steps of mixing a latent hydraulic material and water to produce a first mixture, mixing attapulgite, a phosphate admixture, and water. A step of preparing a mixture, a step of mixing a curing aid capable of curing the latent hydraulic material and water to prepare a third mixture, the first mixture, the second mixture, and the third mixture; And a step of producing a plastic injection material.

  Furthermore, the plastic injection material construction method of the present invention includes a step of preparing a first mixture by mixing a latent hydraulic material and water, a second step of mixing attapulgite, a phosphate admixture and water. A step of preparing a mixture, a step of mixing a curing aid capable of curing the latent hydraulic material and water to prepare a third mixture, the first mixture, the second mixture, and the third mixture; And a step of producing a plastic injection material and a step of injecting the plastic injection material into a desired construction place.

  One aspect of the construction method of the plastic injection material of the present invention can include a step of pumping the first mixture, the second mixture, and the third mixture to the vicinity of the construction site.

ADVANTAGE OF THE INVENTION According to this invention, the plastic injection material which can suppress the increase in the viscosity of each mixture can be provided, reducing the flow value immediately after preparation.
Moreover, according to this invention, the manufacturing method of the plastic injection material which produces such a plastic injection material can be provided.
Furthermore, according to this invention, the construction method of the plastic injection material which constructs such a plastic injection material can be provided.

An embodiment of the present invention will be described.
First, an embodiment of the plastic injection material of the present invention will be described.
The plastic injection material of the present embodiment includes a first mixture containing a latent hydraulic material and water, a second mixture containing attapulgite, a phosphate-based admixture, and water, and curing the latent hydraulic material. It is a plastic injection material obtained by mixing a curing aid and a third mixture containing water.
That is, the plastic injection material of the present embodiment is a plastic injection material formed by separately preparing the first mixture, the second mixture, and the third mixture and then mixing them, so-called two-component plasticity. It is a three-component plastic injection material that is one liquid more than the injection material.

(First mixture)
The first mixture contains a latent hydraulic material and water.

The latent hydraulic material is not particularly limited as long as the material has latent hydraulic properties. For example, blast furnace slag, pozzolanic powder, fly ash and the like can be mentioned, and blast furnace slag is particularly preferable from the viewpoint of excellent fluidity.
In this specification, the latent hydraulic property means that the hydration reaction is not substantially started in a normal state, and the hydration reaction is started in the presence of a curing aid to form a curable hydrate. A property that can be generated.

The content of the latent hydraulic material in the plastic injection material is, for example, 100 kg / m ³ or more and 500 kg / m ³ or less, preferably 200 kg / m ³ or more and 400 kg / m ³ or less. The unit kg / ^{m 3} is the kg per 1 m ³ of the plastic injection material.

(water)
In the first mixture, the ratio (mass ratio) of the amount of water to the amount of the latent hydraulic material is, for example, 0.4 to 1.2, preferably 0.5 to 1.0.
When this mass ratio is in the above range, the fluidity of the first mixture can be adjusted to a more appropriate range.

  The 1st mixture in this embodiment may mix | blend another component as needed. For example, in order to improve the fluidity of the first mixture, a fluidizing agent, a water reducing agent or the like used in the production of concrete may be included in the first mixture.

(Second mixture)
The second mixture contains attapulgite, a phosphate admixture and water.

  The attapulgite acts as a plasticizer when mixed with a latent hydraulic material, a curing aid, and water.

The content of the attapulgite in the second mixture is, for example, 50 kg / m ³ or more and 300 kg / m ³ or less, preferably 75 kg / m ³ or more and 150 kg / m ³ or less. The unit kg / ^{m 3} is the kg per 1 m ³ of the plastic injection material.
When the content of attapulgite is within the above range, it is preferable because the flow value of the plastic injection material can be made more appropriate and the fluidity of the second mixture can be adjusted to a more appropriate range.

  Examples of the phosphate-based admixture include sodium tetrapolyphosphate, sodium pyrophosphate, and sodium hexametaphosphate. Sodium tetrapolyphosphate is preferred from the viewpoint that the fluidity of the second mixture is easily maintained.

The second mixture preferably contains 0.5 to 3.0 parts by mass of the phosphate admixture with respect to 100 parts by mass of the attapulgite.
Further, when the phosphate-based admixture is sodium tetrapolyphosphate, the second mixture contains 0.5 to 3.0 parts by mass of the sodium tetrapolyphosphate with respect to 100 parts by mass of the attapulgite. It is preferable to do.
Further, when the phosphate admixture is sodium pyrophosphate, the second mixture contains 0.75 to 3.0 parts by mass of the sodium pyrophosphate with respect to 100 parts by mass of the attapulgite. Is preferred.
When the content of the phosphate-based admixture is within the above range, sedimentation and separation of the second mixture can be suppressed while maintaining the fluidity of the second mixture.

  The second mixture of the present embodiment can maintain fluidity even after a relatively long period of time has elapsed after preparation. Therefore, for example, the period during which the plastic injection material can be applied can be lengthened by storing it in the state of the second mixture. Moreover, since fluidity | liquidity can be maintained for a comparatively long period in the state of a 2nd mixture, handling, such as transfer of a 2nd mixture, is easy.

(Third mixture)
The third mixture of the present embodiment contains a curing aid that can cure the latent hydraulic material and water.

(Curing aid)
The curing aid of the present embodiment refers to a material that reacts with a latent hydraulic material contained in the first mixture in the presence of water to cause a hydration reaction to develop curability.
Specifically, as hardening aids, lime such as quick lime (calcium oxide CaO), slaked lime (calcium hydroxide Ca (OH) ₂ ), and bituminous lime (CaCO ₃ · MgCO ₃ ), hemihydrate gypsum, dihydrate Examples thereof include gypsum such as gypsum, alkali metal hydroxides, alkali metal alkali salts, phosphoric acid, phosphates, and cement hydrates.
When the latent hydraulic material is blast furnace slag, as a hardening aid, quick lime (calcium oxide, CaO), slaked lime (calcium hydroxide, Ca (OH) ₂ ), bitter lime (CaCO ₃ · MgCO ₃ ) Lime such as is preferable because it tends to cause a curing reaction.
When the latent hydraulic material is pozzolanic powder, examples of the hardening aid include quick lime (calcium oxide, CaO), slaked lime (calcium hydroxide, Ca (OH) ₂ ), and bituminous lime (CaCO ₃ .MgCO ₃ ). Lime, phosphoric acid, phosphate and the like such as these are preferable because they easily cause a curing reaction.

Content in the 3rd mixture of the hardening auxiliary material of this embodiment is 5 to 40 mass parts with respect to 100 mass parts of latent hydraulic materials in a 1st mixture, Preferably it is 10 to 25 mass parts. Or less.
When the content of the curing aid is in the above range, it is preferable because a curing reaction is more easily caused when mixed with the first mixture, the second mixture, and the third mixture.

(water)
In the third mixture, the ratio (mass ratio) of the amount of water to the amount of the curing aid is, for example, 0.8 to 4.0, preferably 1.2 to 3.0.
When this mass ratio is in the above range, the fluidity of the third mixture can be adjusted to a more appropriate range.

In addition, water is 650 kg / m ³ or more and 950 kg / m ³ or less, preferably 750 kg / m ³ or more and 900 kg / m ³ or less, so that the content in the plastic injection material is 750 kg / m ³ or more and 900 kg / m ³ or less, and It is preferable to mix | blend with a 3rd mixture. The unit kg / ^{m 3} is the kg per 1 m ³ of the plastic injection material.
When the content of water in the plastic injection material is within the above range, immediately after mixing the first mixture, the second mixture, and the third mixture, the flow value of the plastic injection material should be appropriate. Can do.

  The third mixture in the present embodiment may contain other components as necessary. For example, in order to improve the fluidity of the third mixture, a fluidizing agent, a water reducing agent or the like used in the production of concrete may be included in the third mixture.

The plastic injection material of this embodiment is a mixture of the first mixture, the second mixture, and the third mixture.
The mixing ratio of the first mixture, the second mixture, and the third mixture is not particularly limited. For example, the volume ratio of the first mixture to the second mixture is 50:50 to 75:25, preferably 60:40 to 70:30, and the ratio of the total volume of the first mixture and the second mixture to the volume of the third mixture is 80:20 to 95: 5, preferably 85. 15 to 90:10.

  Since the plastic injection material of the present embodiment is a three-component plastic injection material in which the first mixture, the second mixture, and the third mixture as described above are mixed, the first mixture, the second mixture, and the third mixture. The mixture can be prepared separately, and can be prepared by mixing the first mixture, the second mixture, and the third mixture at an arbitrary timing such as immediately before construction.

Next, an embodiment of a method for producing a plastic injection material for producing the above plastic injection material will be described.
The method for producing a plastic injection material of the present embodiment includes a step of preparing a first mixture by mixing a latent hydraulic material and water, and a second mixture by mixing attapulgite, a phosphate admixture and water. A step of preparing a third mixture by mixing a curing aid capable of curing the latent hydraulic material and water, the first mixture, the second mixture, and the third mixture. And a step of producing a plastic injection material by mixing.

  In the step of preparing the first mixture, a known mixing method such as mortar can be adopted as a means for mixing the latent hydraulic material and water. For example, using a mixing device such as a mortar mixer or a hand mixer, mixing may be performed at 5 ° C. to 35 ° C. for 1 minute to 10 minutes.

  In the step of preparing the second mixture or the third mixture, the means for mixing each material adopts a mixing method such as mortar under a known mixing condition using a known mixing device in the same manner as the step of preparing the first mixture can do.

The step of producing the first mixture, the step of producing the second mixture, and the step of producing the third mixture may be performed in parallel at the same time, or any one of the steps is performed first, and the remaining steps are performed. It may be performed continuously afterwards, or only two selected processes may be performed simultaneously.
After implementing these processes, the process of producing the plastic injection material by mixing the obtained 1st mixture, the 2nd mixture, and the 3rd mixture is implemented.

  In this case, the step of producing the first mixture and the step of producing the second mixture are carried out in a place away from the construction place where the plastic injection material is applied, for example, a factory, and the obtained first mixture, The process of transporting the two mixture and the third mixture to the vicinity of the construction site by means of separate hoses and the like, respectively, and mixing the first mixture, the second mixture, and the third mixture to produce a plastic injection material You may carry out near the construction site.

  Thus, the first mixture, the second mixture, and the third mixture are mixed in the vicinity of the construction site by mixing the first mixture, the second mixture, and the third mixture to produce the plastic injection material. After mixing the three mixtures, the plastic injection material can be injected into the construction site in a short time.

  As a means for transferring the first mixture, the second mixture, and the third mixture, as described above, a pressure feeding means composed of a pipe body such as a hose or a pipe and a pump may be used, or a means for transferring by a tank lorry, a belt conveyor or the like. However, it is not particularly limited.

In the manufacturing method of the plastic injection material of this embodiment, as a mixing method of the first mixture, the second mixture, and the third mixture, the means for mixing the respective materials is a known mixing method as in the step of preparing the first mixture. A mixing method such as mortar under known mixing conditions can be employed using an apparatus.
Moreover, in the manufacturing method of the plastic injection material of this embodiment, you may mix a 1st mixture, a 2nd mixture, and a 3rd mixture simultaneously. In addition, if the first mixture, the second mixture, and the third mixture are transferred to the vicinity of the construction site, the first mixture and the second mixture may be mixed and then mixed with the third mixture. Alternatively, the first mixture and the third mixture may be mixed before the second mixture is mixed therewith, and the second mixture and the third mixture may be further mixed before the first mixture is mixed therewith. May be. When the latent hydraulic material and the curing aid are mixed later, the mixture becomes easier to mix. Therefore, the first mixture (containing the latent hydraulic material) and the second mixture are mixed, and then the third mixture (curing aid) is mixed. It is preferable to mix a material), or to mix a second mixture and a third mixture (containing a curing aid) and then mix a first mixture (containing a latent hydraulic material).

Next, an embodiment of a method for applying the plastic injection material as described above will be described.
The construction method of the plastic injection material of the present embodiment includes a step of preparing a first mixture by mixing a latent hydraulic material and water, and a second mixture by mixing attapulgite, a phosphate admixture and water. A step of preparing a third mixture by mixing a curing aid capable of curing the latent hydraulic material and water, the first mixture, the second mixture, and the third mixture. A step of mixing to produce a plastic injection material, and a step of injecting the plastic injection material into a desired construction site.

  That is, a plastic injection material can be constructed by injecting the plastic injection material produced as described above into a desired construction location.

The construction method of the plastic injection material of this embodiment includes a step of pumping the first mixture, the second mixture, and the third mixture to the vicinity of the construction site.
That is, in the present embodiment, the method includes a step of pumping the first mixture from a location farther from the construction location than the production location of the plastic injection material to the production location.
Examples of the pressure feeding means include transport means such as a hose connected to a pump.
Since the first mixture, the second mixture, and the third mixture of the plastic injection material of the present embodiment maintain fluidity for a relatively long period of time, for example, long-distance pumping using a long pumping means. Even in this case, it is possible to suppress clogging inside the hose and difficult to pump.
In addition, the plastic injection material according to the present embodiment is constructed by installing a mixing device or the like in the vicinity of the injection location, and mixing the first mixture, the second mixture, and the third mixture in the vicinity of the injection location. The process of producing is implemented.

Further, the plastic injection material is injected into a desired construction place.
Examples of construction sites for injecting the plastic injection material according to this embodiment include cavities and voids in the ground and concrete structures. Since the plastic injection material of this embodiment has an appropriate flow value, the plastic injection material hardly flows out from the construction site.

  In addition, the plastic injection material of this invention, the manufacturing method of a plastic injection material, and the construction method of a plastic injection material are not limited to the structure of the said embodiment. Further, the plastic injection material, the method for producing the plastic injection material, and the method for applying the plastic injection material of the present invention are not limited to the above-described effects. Furthermore, the plastic injection material, the manufacturing method of the plastic injection material, and the construction method of the plastic injection material of the present invention can be variously modified without departing from the gist of the present invention.

  Examples of the present invention will be described below, but the present invention is not limited thereto. First, various measurement methods will be described.

<Measurement method of flow value>
The flow value is a method according to NEXCO test method JHS A 313 (flow value at rest) (hereinafter also simply referred to as “JHS”), and a method according to JIS R5201: 1997 (at the time of impact (for 15 seconds). The flow value was measured with a flow value) (hereinafter also simply referred to as “JIS15”).

<Measurement method of viscosity>
The viscosity was measured at 20 ° C. using an apparatus viscometer VT-04 (manufactured by Rion). In addition, in this embodiment, when a 2000 m sample is pumped at 100 L / min with a 4-inch tube, a preferable viscosity is obtained by using the Darcy-Wisebach equation in consideration of pressure loss. The viscosity is such that the pressure is 2.0 MPa or less. Here, the pressure in the 4-inch tube means the pressure on the inner peripheral surface of the inlet (sample inlet) of the 4-inch tube.

<Measurement method of P funnel>
P funnel is a method of testing fluidity of pre-packed concrete injection mortar (method using P funnel) using a funnel tester (trade name: Prepact Flow Cone (P funnel), manufactured by Kansai Kikai Seisakusho Co., Ltd.) JSCE-F 521) ".

<Comparative example: bentonite, two-component plastic injection material>
Bentonite (Kunigel V1, swelling degree 16 ml / 2 g, manufactured by Kunimine Kogyo Co., Ltd.) (hereinafter also referred to as “V1”), blast furnace slag (fine powder of blast furnace slag) so that the obtained plastic injection material has the composition shown in Table 1 below. , Manufactured by Nippon Steel & Sumikin Kashima Mining Co., Ltd. (hereinafter also referred to as “slag”), polycarboxylic acid-based water reducing agent (Geosper K, manufactured by Floric) (hereinafter also referred to as “GSK”), and water. Were mixed to obtain a first mixture, and slaked lime (No. 1 slaked lime, manufactured by Yoshizawa Lime Industry Co., Ltd.) and water were mixed to obtain a second mixture.
And the 1st mixture and the 2nd mixture were mixed, the plastic injection material of the following mixing | blending 1 was obtained, and the flow value of the plastic injection material immediately after preparation was measured. The results are shown in Table 1 below.

  As shown in Table 1, the flow value of the plastic injection material of Formulation 1 immediately after production showed a large value.

<Comparative example: Bentonite, three-component plastic injection material>

Bentonite (V1), water, and polycarboxylic acid-based water reducing agent (GSK) are mixed to obtain a second mixture so that the obtained plastic injection material has the composition shown in Table 2 below, and blast furnace slag, and Water was mixed to obtain a first mixture, and slaked lime and water were further mixed to obtain a third mixture.
And the 1st mixture, the 2nd mixture, and the 3rd mixture were mixed, the plastic injection material of the following mixing | blendings 2-4 was obtained, and the flow value of the plastic injection material immediately after preparation was measured. Moreover, about the mixing | blending 4, the viscosity of the 2nd mixture immediately after preparation was also measured. The results are shown in Table 2 below.

As shown in Table 2, the flow value of the plastic injection material immediately after the preparation of Formulations 2 and 3 showed a large value. For Formulation 4, the flow value of the plastic injection material immediately after production showed a small value, but the viscosity of the second mixture immediately after production showed a high value of 70 dPa · s.
By increasing the blending ratio of bentonite, the flow value can be decreased, but the viscosity of the second mixture is increased.
In addition, about the mixing | blending 4, in order to reduce the viscosity of a 2nd mixture, although GSK was increased, the viscosity was not able to be reduced so much.

  In place of bentonite (V1), bentonite (super clay, degree of swelling of 20 ml / 2 g or more) (hereinafter also referred to as “SC”) was used, and the blending ratios shown in Table 3 below were used. Similarly, the plastic injection material of the following formulations 5 and 6 was obtained, and the flow value of the plastic injection material immediately after production was measured. Moreover, about the mixing | blending 6, the P funnel and viscosity of the 2nd mixture immediately after preparation and 3 hours after preparation were also measured. The results are shown in Table 3 below.

As shown in Table 3, the flow value of the plastic injection material immediately after preparation of Formulation 5 showed a large value. For Formulation 6, the flow value of the plastic injection material immediately after production showed a small value, but the viscosity of the second mixture 3 hours after production showed a high value of 100 dPa · s.
By increasing the blending ratio of bentonite, the flow value can be reduced, but the viscosity of the second mixture tends to increase.

<Comparative example: attapulgite, two-component plastic injection material>
The attapulgite (hereinafter also referred to as “atp”), blast furnace slag, and sodium pyrophosphate as a phosphate-based admixture (hereinafter also referred to as “pyrroline”) so that the obtained plastic injection material has the composition shown in Table 4 below. ), A polycarboxylic acid water reducing agent (GSK) and water were mixed to obtain a first mixture, and slaked lime and water were mixed to obtain a second mixture.
And the 1st mixture and the 2nd mixture were mixed, the plastic injection material of the following combination 7-12 was obtained, and the flow value of the plastic injection material immediately after preparation was measured. The results are shown in Table 4 below. Moreover, about the mixing | blending 8-10, the P funnel and viscosity of the 1st mixture immediately after preparation and 5 days after preparation were also measured. Since Formulations 8 to 10 had similar results, Table 5 below shows only the results of Formulation 8. In addition, about the mixing | blending 11, since the slag of the 1st mixture settled, the measurement of a P funnel and a viscosity was not performed.

  As shown in Table 4, the flow value of the plastic injection material immediately after the preparation of Formulations 7 and 12 showed a large value. About the compounding 8-10, although the flow value of the plastic injection material immediately after preparation showed the small value, as shown in Table 5, the viscosity of the 2nd mixture 5 days after preparation showed the high value. About the compound 11, although the flow value of the plastic injection material immediately after preparation showed the small value, the blast furnace slag of the 1st mixture settled and separated.

<Example: attapulgite, three-component plastic injection material>
In order to obtain a plastic injection material as shown in Table 6 below, attapulgite, water, and sodium pyrophosphate as a phosphate-based admixture were mixed to obtain a second mixture, and blast furnace slag, and Water was mixed to obtain a first mixture, and slaked lime and water were further mixed to obtain a third mixture.
And the 1st mixture, the 2nd mixture, and the 3rd mixture were mixed, the plastic injection material of the following mixing | blendings 13-22 was obtained, and the flow value of the plastic injection material immediately after preparation was measured. The results are shown in Table 6 below.
Moreover, the following compounding 23 was carried out similarly to the compounding 13-22 except having used sodium tetrapolyphosphate (henceforth "tetra") instead of sodium pyrophosphate, and having become the compounding of the following Table 7. The plastic injection material was obtained, and the flow value of the plastic injection material immediately after production was measured. The results are shown in Table 7 below.

As shown in Tables 6 and 7, the flow values of the plastic injection material immediately after the preparation of the blends 15, 16, and 19 to 23 showed small values. In addition, increasing the amount of attapulgite decreased the flow value.
For blends 13 and 14, the flow value of the plastic injection material immediately after production exceeded the reference value, but the effect obtained by the small amount of attapulgite was slightly smaller than the other blends. Moreover, also about the mixing | blendings 17 and 18, the flow value of the plastic injection material immediately after preparation exceeds the reference value. In general, the flow value becomes large when the amount of blast furnace slag is small. Therefore, the flow values are large in the blends 17 and 18 in which the amount of the blast furnace slag is less than the blends 15, 16, and 19-22.

  A second mixture was prepared at the blending ratio (mass ratio) shown in Table 8 below using the fluidizing agent shown in Table 9 below, and the P funnel and viscosity were measured. The results are shown in Table 9 below. In the table, GSK means a polycarboxylic acid-based water reducing agent (Giosper K, manufactured by Floric), and Mighty 150 means a naphthalene sulfonic acid-based water reducing agent (Mighty 150, manufactured by Kao Corporation).

As shown in Table 9, the second mixture using a phosphate-based admixture as a fluidizing agent is when GSK (polycarboxylic acid-based water reducing agent) or Mighty 150 (naphthalene sulfonic acid-based water reducing agent) is used. In comparison, the P funnel and viscosity showed low values even after days. In addition, the second mixture using tetrapolyphosphoric acid among the phosphate-based admixtures showed a particularly low value even when the P funnel and the viscosity passed the number of days.
This shows that fluidity can be maintained by using a phosphate-based admixture as the admixture. Moreover, it turns out that especially tetrapolyphosphoric acid can hold | maintain fluidity among phosphate type | system | group admixtures.
Although not shown in the table, in the second mixture using GSK as a fluidizing agent, when GSK was increased (3.0 / 1.2 times the amount), fluidity could be maintained. However, it was observed that the attapulgite layer was formed by precipitation separation. When such a second mixture is pumped using a hose, deposits may accumulate in the hose and cause the hose to become clogged. From the viewpoint of workability, it is preferable to use phosphorus rather than GSK. It can be seen that it is better to use an acid salt-based admixture.

The 2nd mixture was produced using the phosphate system admixture of the following table 11 by the mixture ratio (mass ratio) shown in the following table 10 and the following table 11, and the P funnel and viscosity immediately after preparation were measured. Moreover, the presence or absence of sedimentation was confirmed visually. The results are shown in Table 11 below.
In addition, the presence or absence of sedimentation was confirmed by visual observation whether the material was separated after the second mixture was prepared and transferred to a container and allowed to stand for 10 minutes.
Here, the determination was performed based on the following criteria.
◎: When the flow time of the P funnel is 20 seconds or less and the viscosity is 5 dPa · s or less ×: When the viscosity is 40.0 dPa · s or more ○: Other than ◎ and ×

  In the second mixture, increasing the amount of the phosphate-based admixture could lower the viscosity and the P funnel. Further, it was found that when the amount of the phosphate-based admixture is reduced, it is difficult to settle.

  The 1st mixture and the 3rd mixture were produced with the compounding ratio (mass ratio) shown in the following Tables 12 and 13, and the viscosity immediately after preparation and after a predetermined number of days passed was measured. The results are shown in Tables 12 and 13 below.

As shown in Table 12, it can be seen that as the amount of water relative to the amount of slag increases, the viscosity can be kept low and the fluidity can be maintained.
Moreover, as shown in Table 13, it can be seen that as the amount of water (water / slaked lime) with respect to the amount of slaked lime increases, the viscosity can be kept low and the fluidity can be maintained.

Claims (7)

A first mixture containing a latent hydraulic material and water;
A second mixture containing attapulgite, a phosphate admixture and water;
A third mixture containing a curing aid capable of curing the latent hydraulic material and water is provided separately,
Plastic injection material for a kit that is used in the production of plastic injection material. The kit for plastic injection materials according to claim 1, wherein the second mixture contains 0.5 to 3.0 parts by mass of the phosphate admixture with respect to 100 parts by mass of the attapulgite. The kit for plastic injection materials according to claim 1 or 2, wherein the phosphate-based admixture contains sodium tetrapolyphosphate. Mixing a latent hydraulic material and water to produce a first mixture;
Mixing attapulgite, phosphate admixture and water to produce a second mixture;
Mixing a curing aid capable of curing the latent hydraulic material and water to produce a third mixture;
The manufacturing method of a plastic injection material provided with the process of mixing said 1st mixture, said 2nd mixture, and said 3rd mixture, and producing a plastic injection material. Mixing a latent hydraulic material and water to produce a first mixture;
Mixing attapulgite, phosphate admixture and water to produce a second mixture;
Mixing a curing aid capable of curing the latent hydraulic material and water to produce a third mixture;
Mixing the first mixture, the second mixture and the third mixture to produce a plastic injection material;
And a method of injecting the plastic injection material into a desired construction site.   The construction method of the plastic injection material according to claim 5, comprising a step of pumping the first mixture, the second mixture, and the third mixture to the vicinity of the construction site.   A first mixture containing a latent hydraulic material and water;
  A second mixture containing attapulgite, a phosphate admixture and water;
  A third mixture containing a curing aid capable of curing the latent hydraulic material and water; and
  A plastic injection material in which the phosphate-based admixture contains sodium tetrapolyphosphate.