JP5796764B2 - Grout, method for producing grout, method for placing plasticized grout, and method for producing plasticized grout - Google Patents

Description

  The present invention relates to a grout, a method for producing a grout, a method for placing a plasticized grout, and a method for producing a plasticized grout.

Conventionally, when placing grout (cement milk, mortar, concrete, etc.) containing cement, water, and admixture as necessary, grout kneaders (mixer trucks) near the placement site due to topographical factors, etc. Etc.) and the installation site of the kneader is far from the installation site (for example, when performing the back surface cavity filling work of the tunnel), the installation site from the installation site The grout is pumped by a pump through a pipe (for example, Patent Document 1).
For example, the liquid A as a grout and the liquid B as a plasticizing liquid in which a plasticizer (bentonite, attapulgite, etc.) is turbid in water are separately pumped and mixed at the setting site to place the plasticized grout. (For example, Patent Documents 2 to 5).

JP 2008-308837 A JP 11-310779 A JP 2001-335779 A JP 2003-82653 A JP 2003-261194 A

However, if the distance to be pumped (transport distance) is long (for example, 1 to 3 km), the time that the grout stays in the pipe becomes long, and the water and cement in the grout are separated while being pumped. There's a problem.
And as a result, there exists a possibility that the inside of a pipe | tube may be obstruct | occluded with the cement settled by this isolation | separation. In addition, when a grout having a high water content is cast by this separation, the cured product that has been cast and cured may have a low strength.

  Further, from the viewpoint of reducing the energy load during pumping, it is desirable that the grout has a low viscosity during pumping, that is, it is easy to keep the viscosity low.

  In view of the above problems and demands, an object of the present invention is to provide a grout in which water and cement are difficult to separate and the viscosity is easily kept low.

  As a result of intensive studies by the present inventors, it has been found that grout is difficult to separate water and cement by containing a predetermined amount or more of attapulgite. Further, it has been found that the grout is easily kept low in viscosity by containing a predetermined amount or less of attapulgite. And by discovering these, the present invention has been conceived.

  That is, the present invention is obtained by mixing a first mixed solution containing cement and water and a second mixed solution containing attapulgite and water, and 0.1 parts of the attapulgite are added to 100 parts by mass of water. It is in the grout characterized by containing -2.0 mass part.

According to such an invention, the first mixed liquid containing cement and water is obtained by mixing the second mixed liquid containing attapulgite and water, and the attapulgite is added to 0.1 part by weight of 100 parts by mass of water. By containing more than part by mass, it becomes difficult to separate water and cement. And since the grout of this invention cannot separate water and cement easily, when the grout of this invention is pumped with a pipe | tube, there exists an advantage that a pipe | tube is hard to obstruct | occlude. Moreover, even if it pumps and casts with a pipe | tube, there exists an advantage that there is also a low possibility that the obtained hardening body may become a thing with low intensity | strength partially.
Moreover, it is obtained by mixing the first mixed liquid containing cement and water and the second mixed liquid containing attapulgite and water, and contains 2.0 parts by mass or less of the attapulgite with respect to 100 parts by mass of water. Therefore, the viscosity is easily kept low. And since the grout of this invention is easy to keep a viscosity low, when the grout of this invention is pumped with a pipe | tube, there exists an advantage that it can pump with energy efficiency.
That is, when the grout is a grout obtained by mixing a first mixed liquid containing cement and water and a second mixed liquid containing attapulgite and water, the attapulgite is used with respect to 100 parts by mass of water. If it is contained in an amount of more than 2.0 parts by mass, water and cement may be more difficult to separate, but on the other hand, the viscosity becomes too high with time. As a result, this grout is difficult to pump with a tube and cannot be used as a pumped grout.
Furthermore, by mixing the first mixed solution and the second mixed solution containing attapulgite and water, the grout obtained by mixing attapulgite in powder form with the first mixed solution is obtained. In comparison, even if the amount of attapulgite is small, the separation of water and cement is easily suppressed, so that there is an advantage that the amount of attapulgite used is suppressed.

  Further, the present invention is obtained by mixing attapulgite in powder form with a first mixed liquid containing cement and water, and the attapulgite is 1.5 to 4.0 parts by mass with respect to 100 parts by mass of water. The grout is characterized by containing a part.

According to such invention, it is obtained by mixing attapulgite in powder form with the first mixed liquid containing cement and water, and contains 1.5 parts by mass or more of the attapulgite with respect to 100 parts by mass of water. This makes it difficult to separate water and cement. And since the grout of this invention cannot separate water and cement easily, when the grout of this invention is pumped with a pipe | tube, there exists an advantage that a pipe | tube is hard to obstruct | occlude. Moreover, even if it pumps and casts with a pipe | tube, there exists an advantage that there is also a low possibility that the obtained hardening body may become a thing with low intensity | strength partially.
In addition, attapulgite is obtained by mixing powder and attapulgite in the first mixed liquid containing cement and water, and the viscosity is increased by containing 4.0 parts by mass or less of the attapulgite with respect to 100 parts by mass of water. Easy to keep low. And since the grout of this invention is easy to keep a viscosity low, when the grout of this invention is pumped with a pipe | tube, there exists an advantage that it can pump with energy efficiency.
That is, when the grout is a grout obtained by mixing attapulgite in a powder form with the first mixed liquid containing cement and water, 4.0 mass of the attapulgite with respect to 100 mass parts of water. If it is contained more than the part, water and cement may be more difficult to separate, but on the other hand, the viscosity becomes too high with time. As a result, this grout becomes difficult to pump with a tube and cannot be used as a pumped grout.

Furthermore, the present invention provides a plasticized grout by pumping the grout as the A liquid, pumping the B liquid in which the plasticizer and water are mixed, and mixing the pumped A liquid and B liquid. in the striking設方method of plasticizing grout you pouring the reduction grout.

  In addition, the present invention provides a plasticizing grout that is produced by pumping the grout as an A liquid, pumping a B liquid in which a plasticizing material and water are mixed, and mixing the pumped A liquid and the B liquid. It is in the manufacturing method of grout.

  Furthermore, this invention mixes the 1st liquid mixture containing a cement and water, and the 2nd liquid mixture containing an attapulgite and water, 0.1-2 of the said attapulgite with respect to 100 mass parts of water. It is in the manufacturing method of grout characterized by obtaining grout containing 0.0 mass part.

  In the present invention, the first mixed liquid containing cement and water is mixed with attapulgite in powder form, and the attapulgite is contained in an amount of 1.5 to 4.0 parts by mass per 100 parts by mass of water. There is a method for producing a grout, characterized in that the grout is obtained.

According to the present invention, it is possible to provide a grout in which water and cement are hardly separated and the viscosity is easily kept low.
And since the grout of this invention cannot separate water and cement easily, when the grout of this invention is pumped with a pipe | tube, there exists an advantage that a pipe | tube is hard to obstruct | occlude. Moreover, even if it pumps and casts with a pipe | tube, there exists an advantage that there is also a low possibility that the obtained hardening body may become a thing with low intensity | strength partially.
Moreover, since the viscosity of the grout of the present invention is easily kept low, there is also an advantage that when the grout of the present invention is pumped with a pipe, it can be pumped with energy efficiency.

Schematic of a pumping device for an actual machine short-range pumping test.

  Hereinafter, an embodiment of the present invention will be described.

<First Embodiment>
First, the grout of the first embodiment will be described.
The grout of the first embodiment contains cement, water, and attapulgite.
Note that attapulgite is a hydrous magnesium silicate mineral generally represented by a chemical formula of Si ₈ O ₂ OMg ₅ (OH) ₂ (OH ₂ ) ₄ .H ₂ O.

  As the cement, at least one of ordinary portland cement such as blast furnace, early strength, super early strength, white color, sulfate resistance, moderate heat, low heat, and special cements such as jet cement and alumina cement is used. Can be mentioned.

  Moreover, the grout of this invention may contain an admixture and an admixture within the range which does not impair the effect of this invention.

  Examples of the admixture include silica fume and fly ash.

  Examples of the admixture include water reducing agents, high performance water reducing agents, and high performance AE water reducing agents.

  Moreover, the grout of 1st Embodiment contains water specifically, 40-100 mass parts with respect to 100 mass parts of cement, More specifically, 50-80 mass parts.

  Furthermore, the grout of 1st Embodiment is a grout obtained by mixing the 1st liquid mixture containing a cement and water, and the 2nd liquid mixture containing an attapulgite and water.

Moreover, the grout of 1st Embodiment is 0.1-2.0 mass parts with respect to 100 mass parts of water, Preferably it is 0.2-1.7 mass parts, More preferably, 0.6- Contains 1.4 parts by weight.
By containing 0.1 part by mass or more of the attapulgite with respect to 100 parts by mass of water, the grout of the first embodiment has an advantage that it is difficult to separate water and cement. Moreover, the grout of 1st Embodiment has the advantage that a viscosity is easy to be kept low by containing the said attapulgite below 2.0 mass parts with respect to 100 mass parts of water.

The grout of the first embodiment is configured as described above. Next, a method for manufacturing the grout of the first embodiment will be described.
In the manufacturing method of the grout of 1st Embodiment, the grout is obtained by mixing the 1st liquid mixture containing a cement and water, and the 2nd liquid mixture containing an attapulgite and water.
Specifically, in the method for producing a grout according to the first embodiment, a first mixed liquid preparation step of mixing cement and water to obtain a first mixed liquid, and attapulgite and water are mixed to form a second mixed liquid. A second mixed liquid preparation step to be obtained and a grout preparation step for obtaining a grout by mixing the first mixed liquid and the second mixed liquid are performed.

  In the first mixed liquid preparation step, the first mixed liquid is added so that the water is specifically 40 to 100 parts by mass, more specifically 50 to 80 parts by mass with respect to 100 parts by mass of the cement. Make it.

  In the second mixed liquid preparation step, attapulgite, water, and a dispersant as necessary are mixed to obtain a second mixed liquid.

  In the second mixed liquid preparation step, the second mixed liquid is prepared so that attapulgite is specifically 7 to 30 parts by mass, more specifically 10 to 25 parts by mass with respect to 100 parts by mass of water. Make it.

Examples of the dispersant used in the second mixed liquid preparation step include phosphate, water-soluble carboxylate, and sulfonate.
Examples of the phosphate include potassium pyrophosphate, sodium pyrophosphate, sodium tripolyphosphate, sodium tetrapolyphosphate, and the like.
Examples of the water-soluble carboxylate include sodium salts such as acetic acid, lactic acid, malic acid, tartaric acid, malonic acid, and gluconic acid, and potassium salts of these acids.
Examples of the sulfonate include lignin sulfonate, naphthalene sulfonate, melamine sulfonate, and the like.
As the dispersant, it is preferable to use a phosphate, and it is particularly preferable to use sodium pyrophosphate.

  In the second mixed liquid preparation step, the dispersant is specifically 0.2 to 3.0 parts by mass, more specifically 0.5 to 2.0 parts by mass with respect to 100 parts by mass of attapulgite. A second mixed solution is prepared so as to be a part.

  In the grout production step, grout is produced such that water is specifically 40 to 100 parts by mass, more specifically 50 to 80 parts by mass with respect to 100 parts by mass of cement.

Furthermore, in the grout preparation step, the attapulgite is 0.1 to 2.0 parts by weight, preferably 0.2 to 1.7 parts by weight, more preferably 0.6 to 1. A grout is produced so that it may become 4 mass parts.
By containing 0.1 part by mass or more of attapulgite with respect to 100 parts by mass of water, the resulting grout has an advantage that it is difficult to separate water and cement. Further, by containing 2.0 parts by mass or less of attapulgite with respect to 100 parts by mass of water, the resulting grout has an advantage that the viscosity is easily kept low.

  The grout of the first embodiment and the method of manufacturing the grout of the first embodiment are configured as described above. Next, a method for placing the plasticized grout of the first embodiment will be described.

  In the plasticizing grout placement method of the first embodiment, the A liquid pumping step of pumping the grout of the first embodiment as A liquid with a pipe, and the B liquid in which the plasticizing material and water are mixed are And a B liquid pumping process for pumping with another pipe, an AB mixing process for mixing the pumped A liquid and B liquid to obtain a plasticized grout, and a casting process for driving the plasticized grout. .

Examples of the plasticizer contained in the liquid B include attapulgite and bentonite. The bentonite is a clay mainly composed of montmorillonite mineral.
The plasticizer is preferably attapulgite. The kneading equipment for kneading attapulgite and water at the time of preparation of the liquid A can also be used for the preparation of the liquid B, and there is an advantage that it is not necessary to prepare a separate kneading facility for the liquid B. Because there is.

  Moreover, in the said B liquid pressure sending process, the said plasticizer, water, and a dispersing agent as needed are mixed, and B liquid is obtained.

  Furthermore, in the B liquid pressure feeding step, the plasticizer is specifically 0.2 to 3.0 parts by mass, more specifically 0.5 to 2.0 parts by mass with respect to 100 parts by mass of water. B liquid is produced so that it may become a part.

Examples of the dispersant used in the B liquid pressure feeding step include phosphate, water-soluble carboxylate, and sulfonate.
Examples of the phosphate include potassium pyrophosphate, sodium pyrophosphate, sodium tripolyphosphate, sodium tetrapolyphosphate, and the like.
Examples of the water-soluble carboxylate include sodium salts such as acetic acid, lactic acid, malic acid, tartaric acid, malonic acid, and gluconic acid, and potassium salts of these acids.
Examples of the sulfonate include lignin sulfonate, naphthalene sulfonate, melamine sulfonate, and the like.
When the plasticizer contained in the B liquid is attapulgite, it is preferable to use a phosphate as the dispersant used in the B liquid pumping step, and it is particularly preferable to use sodium pyrophosphate. .
When the plasticizer contained in the B liquid is bentonite, it is preferable to use a water-soluble carboxylate as the dispersant used in the B liquid pumping step, and in particular, use a polycarboxylate. Is particularly preferred.

  Moreover, in the said B liquid pressure feeding process, a dispersing agent is specifically 0.2-3.0 mass parts with respect to 100 mass parts of said plasticizers, More specifically, 0.5-2.0. B liquid is produced so that it may become a mass part.

  In the AB mixing step, specifically, the A liquid and the B liquid are in a volume ratio of A liquid: B liquid from 1: 0.8 to 1: 4, more specifically from 1: 1 to 1: 3. Mix so that

  In the AB mixing step, the plasticized grout is prepared so that water is specifically 60 to 300 parts by mass, more specifically 80 to 250 parts by mass with respect to 100 parts by mass of cement. .

  The grout according to the first embodiment, the method for producing the grout according to the first embodiment, and the method for placing the plasticized grout according to the first embodiment are configured as described above. The manufacturing method is a method for obtaining a plasticized grout by performing the A liquid pressure feeding step, the B liquid pressure feeding step, and the AB mixing step.

Second Embodiment
Next, the grout of the second embodiment, the grout production method, and the plasticized grout placement method will be described.
In addition, the description which overlaps with 1st Embodiment is abbreviate | omitted, and especially the thing which is not demonstrated in 2nd Embodiment shall be the same content as what was demonstrated in 1st Embodiment.

The grout of the second embodiment is a grout obtained by mixing attapulgite in powder form with a first mixed liquid containing cement and water.
“Mixing attapulgite into the first mixed solution in a powdery state” means “mixing attapulgite that is not mixed with water into the first mixed solution”.

Moreover, the grout of 2nd Embodiment contains 1.5-4.0 mass parts of the said attapulgite with respect to 100 mass parts of water, Preferably 2.0-3.5 mass parts is contained.
By containing 1.5 parts by mass or more of the attapulgite with respect to 100 parts by mass of water, the grout of the first embodiment has an advantage that water and cement are difficult to separate. Further, by containing 4.0 parts by mass or less of the attapulgite with respect to 100 parts by mass of water, the grout of the first embodiment has an advantage that the viscosity is easily kept low.

The grout of the second embodiment is configured as described above. Next, a method for manufacturing the grout of the second embodiment will be described.
In the method for producing a grout according to the second embodiment, grout is obtained by mixing attapulgite in powder form with the first mixed liquid containing cement and water.
Specifically, in the method for producing a grout according to the second embodiment, a first mixed liquid preparation step for obtaining a first mixed liquid by mixing cement and water, and attapulgite in a powder form are added to the first mixed liquid. A grout production step of obtaining a grout by mixing as it is is performed.

In the grout production step, grout is produced so that the attapulgite is 1.5 to 4.0 parts by mass, preferably 2.0 to 3.5 parts by mass with respect to 100 parts by mass of water.
By containing 1.5 parts by mass or more of attapulgite with respect to 100 parts by mass of water, the resulting grout has an advantage that water and cement are difficult to separate. Further, by containing 4.0 parts by mass or less of attapulgite with respect to 100 parts by mass of water, the resulting grout has an advantage that the viscosity is easily kept low.

  The grout according to the second embodiment and the method for producing the grout according to the second embodiment are configured as described above. Next, a method for placing the plasticized grout according to the second embodiment will be described.

  In the plasticizing grout placement method of the second embodiment, the A liquid pumping step of pumping the grout of the second embodiment as the A liquid with a pipe, and the B liquid in which the plasticizing material and water are mixed are used as the pipe. And a B liquid pumping process for pumping with another pipe, an AB mixing process for mixing the pumped A liquid and B liquid to obtain a plasticized grout, and a casting process for driving the plasticized grout. .

  The grout according to the second embodiment, the method for producing the grout according to the second embodiment, and the method for placing the plasticized grout according to the second embodiment are configured as described above. The manufacturing method is a method for obtaining a plasticized grout by performing the A liquid pressure feeding step, the B liquid pressure feeding step, and the AB mixing step.

  The grout, the grout production method, and the plasticized grout placement method according to the first and second embodiments have the above-described configuration. However, the grout, the grout production method, and the plasticization of the present invention are described above. The method of placing the grout is not limited to the above configuration, and the design can be changed as appropriate.

For example, the grout (A liquid) of the present invention may contain coarse aggregate and fine aggregate as long as the effects of the present invention are not impaired.
As the coarse aggregate and the fine aggregate, those according to JIS A 5308 can be preferably used. However, the material of the coarse aggregate and the fine aggregate does not impair the effects of the present invention. If it is in the range, there is no particular limitation. Moreover, as a material of a coarse aggregate and a fine aggregate, what mixed river sand, mountain sand, land sand, sea sand, quartz sand etc. individually by 1 type or 2 types or more, respectively is employable.

Next, the present invention will be described more specifically with reference to examples and comparative examples.
In addition, the quantity of the attapulgite shown below means the value converted into 100 mass% of attapulgite which is not mixed with other minerals.

<Preparation of grout of formulation 1-23>
First, attapulgite, water, and sodium pyrophosphate as a dispersing agent were mixed at a blending ratio shown in Table 1 to obtain attapuld muds 1 and 2 as a second mixed liquid.

Moreover, blast furnace cement, water, and polycarboxylic acid as an admixture were mixed at a blending ratio shown in Table 2 to obtain a first mixed solution.
Next, the 1st liquid mixture and the 2nd liquid mixture were mixed by the compounding ratio shown in Table 2, and the grout (A liquid) of the mixing | blending 2-15 was obtained. Moreover, the attapulgite was mixed with the 1st liquid mixture with the compounding ratio shown in Table 2 with the powder form, and the grout (A liquid) of the mixing | blending 16-23 was obtained. Furthermore, the 1st liquid mixture itself was used as the grout (A liquid) of the mixing | blending 1. FIG.

  And the following test was implemented using the grout of the mixing | blending 1-23.

<Viscosity>
Immediately after producing grouts of formulations 1 to 23 (immediately after kneading) and 3 hours after production, the viscosities of grouts of formulations 1 to 23 were measured. The viscosity was measured with a bisco tester (rotary viscometer).

<Simple sedimentation test>
Immediately after preparing grouts of formulations 1 to 23 (immediately after kneading), the densities of the grouts of formulations 1 to 23 were measured. Immediately after preparation of the grouts of Formulations 1 to 23, the grouts of Formulations 1 to 23 were each packed in a vinyl chloride cylindrical container (dimension: φ4 cm × h58 cm), and 3 hours after packing, the upper part ( A grout sample was taken from the position of 0-19 cm from the top of the container, middle (between 19-38 cm from the top of the container), and lower (between 38-58 cm from the top of the container), and the density of each sample was measured. Density is obtained by filling a 196.35 mL container with grout, measuring the mass of the grout including the container, subtracting the mass of the container from the mass to obtain the mass of the grout, and calculating the mass by the volume in the container. Obtained by dividing.

The results of the above test are shown in Table 3. The evaluation shown in Table 3 was judged based on the following criteria.
Scope of the present invention (Δ): The difference between the density of the grout immediately after production and the density of the grout collected from the upper part, the middle part, and the lower part three hours after filling the container is ± 0.1 g / cm ³ or less. And the mixing | blending whose viscosity of the grout 3 hours after preparation was 2.0 dPa * s or less.
Preferred range (◯): The difference between the density of the grout immediately after production and the density of the grout collected from the upper part, the middle part, and the lower part three hours after filling the container is ± 0.05 g / cm ³ or less, and A formulation in which the viscosity of the grout 3 hours after preparation was 1.8 dPa · s or less.
More preferable range (◎): The difference between the density of the grout immediately after preparation and the density of grout collected from the upper part, the middle part, and the lower part three hours after filling the container is ± 0.03 g / cm ³ or less. And the mixing | blending whose viscosity of the grout 3 hours after preparation was 1.5 dPa * s or less.
(X): A composition out of the range of evaluation of Δ, ○, ◎.

As shown in Table 3, the grout obtained by mixing the first mixed water and the second mixed water and the grout obtained by mixing attapulgite in powder form with the first mixed water are both water. As the amount of attapulgite (parts by mass) relative to 100 parts by mass increased, the viscosity immediately after kneading tended to increase.
Further, the grout obtained by mixing the first mixed water and the second mixed water had a lower density than the grout obtained by mixing the first mixed water with attapulgite in powder form.

<Preparation of grouts of formulations 24 and 25>
Similarly to the grouts of the above-mentioned blends 1 to 23, attapul mud having the blend of Table 4 below was prepared, and grouts of blends 24 and 25 of the following Table 5 were prepared using this attapul mud.

<Real machine short-distance pumping test 1>
The grouts of formulations 24 and 25 were pumped by a pump (Mono pump) 2 through a tube (hose) 1 (diameter: 2 inches, cross-sectional area: 19.8 cm ² ) (FIG. 1). The pumping distance was 60 m, the volume flow rate was about 1 L / min, the pumping time was 130 minutes, and the total pumped capacity was 120 L.
Then, the grout immediately after production (immediately after kneading), the grout pumped 20 m ahead (45 minutes after the start of pumping), the grout pumped 40 m ahead (90 minutes after the start of pumping), and the grout pumped 60 m ahead ( The density of 130 minutes after the start of pumping was measured for each of the blends 24 and 25. Density is obtained by filling a 196.35 mL container with grout, measuring the mass of the grout including the container, subtracting the mass of the container from the mass to obtain the mass of the grout, and calculating the mass by the volume in the container. Obtained by dividing. The results are shown in Table 6.

  The grout of Formulation 25 (Example) within the scope of the present invention had almost no change in density even during the pumping process as compared with the conventional type Formulation 24 (Comparative Example) containing no attapulgite. Therefore, it became clear that the grout of the compounding 25 (Example) within the scope of the present invention is difficult to separate.

<Preparation of grouts of formulations 26 and 27>
Similarly to the grouts of the above-mentioned formulations 24 and 25, the attapul mud of Table 4 was prepared, and the grouts (A liquid) of the following formulas 26 and 27 of Table 7 were prepared using this apatal mud.

<Real machine short-distance pumping test 2>
Under the same conditions as the actual machine short-distance pumping test 1, the grouts (Liquid A) of the blends 26 and 27 were respectively pumped.
Then, the grout (liquid A) pumped 20 m ahead (45 minutes after the start of pumping), the grout (liquid A) pumped 40 meters ahead (90 minutes after the start of pumping), and the grout pumped 60 m ahead (liquid A) ) (130 minutes after the start of pumping).
Next, this collected grout (liquid A), and immediately after production (immediately after kneading) grout (liquid A), and liquid B shown in Table 8 below are mixed with 83 parts by weight of liquid A with respect to 100 parts by weight of liquid B. The grout was obtained by mixing. Then, the grout was cast to prepare a specimen having a diameter of 5 cm × 10 cm, and the compressive strength and density of the specimen were measured. The compressive strength was measured according to a uniaxial compression test of soil (JIS A 1216). In addition, the density is measured by filling the grout in a 196.35 mL container, measuring the mass of the grout including the container, subtracting the mass of the container from the mass, obtaining the mass of the grout, and calculating the mass in the container. Determined by dividing by volume. The results are shown in Table 9.

  As shown in Table 9, compound 26 (comparative example) was used as a specimen obtained by mixing the grout of the composition 27 within the scope of the present invention (Example) as the A liquid and mixing with the B liquid after pumping. As compared with the case, even when pumped, the compressive strength of the specimen was high, and the density of the specimen was high.

  1: Pipe (hose), 2: Pump (Mono pump)

Claims (9)

It is obtained by mixing a first mixed solution containing cement and water and a second mixed solution containing attapulgite and water, and 0.1 to 1.7 parts by mass of the attapulgite with respect to 100 parts by mass of water. Pump the contained A liquid,
Pump B liquid mixed with plasticizer and water,
A method for placing a plasticized grout, in which the liquid A and the liquid B that are fed under pressure are mixed to obtain a plasticized grout, and the plasticized grout is placed. A solution containing 1.5 to 4.0 parts by mass of the attapulgite is obtained with 100 parts by mass of water obtained by mixing attapulgite in powder form with the first mixed liquid containing cement and water. Pumped,
Pump B liquid mixed with plasticizer and water,
A method for placing a plasticized grout, in which the liquid A and the liquid B that are fed under pressure are mixed to obtain a plasticized grout, and the plasticized grout is placed. Wherein before said the A solution B solution and is mixed, hitting設方method of plasticizing grout according to 請 Motomeko 1 or 2 you long distance pumping said solution A in a tube. The method for placing a plasticized grout according to claim 3, wherein a distance in which the liquid A is pumped by the pipe is 1 to 3 km . It is obtained by mixing a first mixed solution containing cement and water and a second mixed solution containing attapulgite and water, and 0.1 to 1.7 parts by mass of the attapulgite with respect to 100 parts by mass of water. Pump the contained A liquid,
Pump B liquid mixed with plasticizer and water,
A method for producing a plasticized grout, wherein the liquid A and the liquid B fed under pressure are mixed to produce a plasticized grout. A solution containing 1.5 to 4.0 parts by mass of the attapulgite is obtained with 100 parts by mass of water obtained by mixing attapulgite in powder form with the first mixed liquid containing cement and water. Pumped,
Pump B liquid mixed with plasticizer and water,
A method for producing a plasticized grout, wherein the liquid A and the liquid B fed under pressure are mixed to produce a plasticized grout. Wherein before the A liquid and the B liquid are mixed, the manufacturing method of plasticizing grout according to the A liquid 請 Motomeko 5 or 6 you long distances pumped tube. The method for producing a plasticized grout according to claim 7 , wherein a distance for pumping the liquid A through the pipe is 1 to 3 km.   The attapulgite is mixed in powder form with the first mixed liquid containing cement and water to obtain a grout containing 1.5 to 4.0 parts by mass of the attapulgite with respect to 100 parts by mass of water. A characteristic grout production method.

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