KR101697964B1

KR101697964B1 - Chemical composition for Grouting

Info

Publication number: KR101697964B1
Application number: KR1020160038880A
Authority: KR
Inventors: 이남영
Original assignee: 주식회사 리엔
Priority date: 2016-03-31
Filing date: 2016-03-31
Publication date: 2017-01-19

Abstract

There is provided a chemical liquid composition for grouting, which is able to protect the environment and reduce the material cost for construction by utilizing by-products of recycled resources, which are low-cost raw materials. Wherein the grouting chemical liquid composition comprises: a gelling agent containing sodium silicate; And a binder mixed with the gelling agent to produce a gel-type paper-based filler.

Description

[Technical Field] The present invention relates to a chemical composition for grouting,

The present invention relates to grouting, and more particularly, to a grouting chemical liquid composition used for construction of ground reinforcement, order, multi-story steel pipe, pile filling and the like.

In recent years, global warming has become more serious. As the first cause of global warming, the use of fossil fuels has been pointed out and it is continuously increasing with the development of industry. Cement, which has been used for a long time in the field of construction, is a large amount of carbon dioxide which is known as a cause of warming in the manufacturing process. Respectively.

During the manufacturing process of cement, 729 to 911 kg of carbon dioxide is emitted. According to the Korea Cement Association, the amount of cement produced in 2015 was announced to be 3.6 million tons. Based on this, the amount of carbon dioxide generated is at least 26 million to 32 million tons. From this point of view, we are looking for alternative materials that can reduce the amount of cement used in construction sites. Circulating resources such as fly ash and blast furnace slag are used in the ready mix sector. However, in the field of grouting and finishing, its use was restricted because of difficulty in controlling the strength problem and gelation (or condensation) time.

Grouting is defined as infiltrating and impregnating a modifying material into the stratum in order to improve it to meet the objectives of a specific nature of the ground. The grouting is divided into cement injection material (binder) and chemical solution injection material (gelling agent) according to the injection material. The two injection materials are mixed with each other and gelled and cured in several seconds to several minutes.

The origin of the grouting began in 1802, when French engineer CHARLESS BERIGNY, the early 19th century, used the suspension of clay and limestone to reinforce the wall of the DIEPPE harbor using the PERCUSSION PUMP he designed. Since then Portland Cement has been developed in the UK. MARCISAMBARD BRUNEL used portland cement for the construction of the Teeth Tunnel for the first time and used portland cement as an injection material to reinforce the foundation rock reinforcement of the RUNSTALL dam and to seal cracks in the mine. .

In 1887, JEZIORSKY of Germany acquired a patent as TWOSHOT method to control gelling time by adding calcium chloride as a reaction accelerator to sodium silicate. In 1909, DUMONT and LEMAIRE discovered a method of cementing by adding acid to sodium silicate as a reaction promoter And patented the method of ONE-SHOT injection. In 1906 FRANCOIS controlled the gelation time by adding aluminum sulphate to aluminum silicate as a reaction promoter. Professor HANS JAHDE of Germany devised a method of injecting a suspension of sodium silicate and cement into the ground. .

The composition of the water-swellable base is based on sodium silicate (also called water glass, sodium silicate, sodium silicate or the like) which causes gelation and is used as an acidic solution, basic salt, acid salt, metal salt, glyoxal, ethylene glycol, diacetate , Butyl lactone, triacetin and the like are used. The reaction promoter can be broadly classified into alkaline and non-alkaline.

The alkaline reaction promoter may be classified into a suspension type and a solution type.

The suspension-type alkaline reaction promoter generally has a gelation time of about 10 to 30 minutes when mixed with sodium silicate as a gelling agent and cement as a binder. The gelation time is generally 60 to 120 seconds, The gelling time of the complete type specified in seconds is greatly deviated, and it is not suitable to be referred to as a binder.

The solution type alkaline reaction promoter shortens the gelation time by adding an acidic reaction promoter to cement, which is a gelling agent and sodium silicate, but poses a problem of safety of workers due to the explosive reactivity of sulfuric acid used as an acidic reaction promoter.

The addition of a metal salt reaction promoter to cement, which is a gelling agent and sodium cement as a binder, has the advantage of being able to control the gelation time a little freely. However, metal chlorides such as calcium chloride, magnesium chloride, potassium chloride, Aluminum sulfate and the like have a weak point that the polymerization reaction of the gelling agent is significantly slower than that of the acidic reaction promoter and consequently the binder is easily leached into water.

The use of an organic reaction promoter for sodium cesium silicate as a gelling agent and cement as a binder facilitates the control of the gelation time like a metal salt reaction promoter while the use of the materials such as glyoxal and ethylene glycol is expensive, Positive organic matter raises the biochemical oxygen demand of groundwater and causes the environment to have a bad influence.

Non-alkaline reaction accelerators can also be classified into a suspension type and a solution type.

The suspension type non-alkaline reaction promoter has a problem in that the mixing of silica sol as a gelling agent and cement as a binder significantly reduces the problem of leaching and high strength as compared with the alkaline gelling agent, .

The solution type non-alkaline reaction promoter is a method in which silica sol, which is a gelling agent, is mixed with an acidic reaction promoter on the cement, which is a binding material, in situ, and can be used for leaching and high strength. However, when the acidic reaction accelerator is used The explosive reactivity of the acid solution threatens the safety of the operator and requires a large plant with an ion exchange tower, which requires a long time to secure the work space and preparation of the material, and to lower the strength of the sorbent material by acidification of the binder have.

Conventionally, various chemical compositions of the grouting material for grouting have used cement as a main material of the binder. In order to shorten the gelation time and increase the strength, the amount of sodium silicate which is expensive and strong alkaline is increased, so that the ratio of the material cost in the construction ratio is increased And explosive reactivity during the dilution of strongly acidic materials, posing a threat to safety at all times.

In addition, the cement as a binder is degraded in strength when it is acidified due to an acidic reaction promoter. On the other hand, in the production process, it is proposed to use cheap binders by using byproduct classified as recycled resource while suppressing the use of cement, which is a binder that emits a large amount of carbon dioxide. Such a binder, Even if the accelerator is used, the strength is not deteriorated.

Patent Registration No. 10-1582246 {December 28, 2015}

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a chemical liquid composition for grouting, which can protect the environment and reduce the material cost required for construction by utilizing by-products of recycled resources, .

According to an aspect of the present invention, there is provided a grouting chemical liquid composition comprising: a gelling agent containing sodium silicate; And a binder which is mixed with the gelling agent to produce a gel-type paper-based filler.

The sodium silicate is used in an aqueous solution composed of Na ₂ O and SiO ₂ either alone or diluted in water or in combination with a reaction accelerator or a reaction retarder and the weight ratio of the SiO ₂ to the Na ₂ O It is preferably 1.5 to 4.5 times.

Weight ratio of said gelling agent, said Na ₂ O is from 5 to 15% of the total weight, said SiO ₂ is 15 to 45%, and the binder is not less than 40% as CaSO ₄ standards, the binding agent is CaSO ₄ in the general formula , CaSO ₄ H ₂ O, CaSO ₄ 1 / 2H ₂ O, and CaO may be used alone or diluted with water, or an additive containing a carbonate or inorganic hydrate may be diluted together with water It is more preferable to use it.

The binder is a mixture of one or more selected from the group consisting of CaSO ₄ , CaSO ₄ H ₂ O, and CaSO ₄ 1 / 2H ₂ O, wherein CaO is 1 to 50% of the total weight ratio The weight ratio is 1 to 90%, and the weight ratio of the additive is preferably 10% or less of the binder.

Wherein the carbonate comprises at least one selected from the group consisting of calcium carbonate, magnesium carbonate, sodium carbonate, potassium carbonate and barium carbonate, and the inorganic hydrogen salt is selected from the group consisting of sodium monohydrogenphosphate, sodium dihydrogenphosphate, potassium monohydrogenphosphate, It preferably contains at least one selected from the group consisting of potassium hydrogen sulfate or sodium hydrogen sulfate, potassium hydrogen sulfate, methyl hydrogen sulfate, ethyl hydrogen sulfate, and hydrogen sulfate.

The binder preferably further comprises a Portland cement, a blast furnace slag cement, a fly ash cement, and a silica fume as a pozzolan-reactive material.

According to the present invention, since sodium hydrogen phosphate, sodium hydrogen sulfate, and methyl hydrogen sulfate are used instead of the conventional chloride or strong acid as a reaction promoter, the rate of the polymerization reaction can be appropriately controlled. However, in the case of a grouting chemical liquid composition requiring high strength, since the use of the above-mentioned reaction accelerator increases the amount of the gelling agent and the binder, the gelling time is shortened and the working time can not be secured in the field. When sodium carbonate, potassium carbonate, magnesium carbonate, barium carbonate or the like is selectively used as a reaction retarder for solving the above problems, only a reaction promoter is used in a grouting chemical composition requiring high strength, The gelation time can be controlled.

Therefore, the gelling time can be easily controlled while using a cheap binder by using the reaction accelerator and the reaction retarder as additives according to the present invention, and the physical properties can be controlled by increasing or decreasing the usage.

That is, if the weight ratio of sodium silicate to diluted water in the gelling agent is more than 1: 2, the gelation time becomes long. At this time, in order to shorten the gelation time, sodium hydrogen sulfate is mixed with diluted water of sodium silicate, or the mixture is preliminarily mixed with the binder in powder form. In this case, the amount of the reaction promoter is not required to be used when the weight ratio of the sodium silicate to the diluting water is 1: 1 or less, and when the weight ratio of the sodium silicate to the diluting water is 1: 2 or less, To 2% of sodium silicate is used, and when the weight ratio of sodium silicate to diluted water is between 1: 2 and 1: 3, the amount of the reaction promoter used is 2 to 3% of sodium silicate. Is 1: 3 or more, the amount of the reaction promoter is 3 to 5% of the amount of sodium silicate, so that the gelation time can be controlled.

If the weight ratio of the sodium silicate to the diluting water is 1: 1 or less, it is not necessary to use a reaction promoter, but rather a reaction retarder is required. In this case, the amount of the reaction retarder used is preferably 3% or less of the sodium silicate .

That is, in the case where the ratio of the diluting water in the total weight ratio of the sodium silicate as the gelling agent and the diluting water is 80 to 100%, sodium carbonate as the reaction retarder is used in an amount of 1% of the amount of the gelling agent and the total weight ratio of the gelling agent and the diluting water Sodium carbonate as the reaction retarder is used in an amount of 2% of the amount of the gelling agent. When the ratio of the diluting water is 65% or less, the sodium carbonate is used in an amount of 3% of the amount of the gelling agent do. However, if the amount of sodium carbonate is more than 3%, the gelation time becomes too long and the function of the gelling agent is lost.

In the composition of the binder, the gelation time varies depending on the ratio of the diluted water to the CaSO ₄ content or the CaO content. According to the present invention, it can be utilized to delay the warming of the atmospheric environment, which is becoming serious every day, by replacing or suppressing the cement that releases carbon dioxide in the cement production process. It is also possible to use a strong acid It is possible to create a condition for working in a safe working environment by removing the element, and it is also effective to reduce the material cost of the material to be dispensed.

FIG. 1 is a view showing a first step in which sodium silicate is bonded to each other by Ca ²⁺ to form a straight linear polymer structure.
FIG. 2 is a diagram showing a second step in which a linear polymer structure in the first step of FIG. 1 is dehydrated in a silicate monomer by acid catalysis and forms a reticulated polymer and then coagulates.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, the terms used in the specification and claims should not be construed in a dictionary sense, and the inventor may, on the principle that the concept of a term can be properly defined in order to explain its invention in the best way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

Therefore, the embodiments shown in the present specification and the drawings are only exemplary embodiments of the present invention, and not all of the technical ideas of the present invention are presented. Therefore, various equivalents It should be understood that water and variations may exist.

The chemical liquid composition for grouting according to the present invention comprises: a gelling agent containing sodium silicate; And a binder which is mixed with the gelling agent to produce a filler.

The sodium silicate is used by using an aqueous solution composed of Na ₂ O and SiO ₂ , either alone or diluted with water, or using a reaction promoter or a reaction retarder. The weight ratio of the SiO ₂ constituting the sodium silicate is preferably 1.5 to 4.5 times the weight ratio of the Na ₂ O.

Weight ratio of said gelling agent, said Na ₂ O is from 5 to 15% of the total weight, said SiO ₂ is 15 to 45%, and when diluted the water varies its rate, the binder is more than 40% as CaSO ₄ standard , And the ratio thereof is changed when diluted in the water.

The sodium silicate is a compound in which silica (SiO ₂ ) and alkali metal (M ₂ O) are bonded at various molar ratios as one of the oldest and friendly inorganic compounds. It is generally expressed by the molecular formula of M ₂ O-nSiO ₂ -xH ₂ O because it contains some water in the structure. It is also called water glass because of its solubility in water. The sodium silicate dissolved in the water exhibits various characteristics depending on the molar ratio of the silica to the alkali metal and the concentration of the solution and is used for various purposes.

Referring to gelling principles of the sodium silicate is not a single compound, as combination of a number of ratio of the Na ₂ O (sodium oxide) and SiO ₂ (silica), molecular formula as is Na ₂ O-nSiO ₂ (n is a mole Ratio). n is a molar ratio and n = 0.5 to 4 is suitable.

Herein, when n is 1 or less, it is referred to as crystalline sodium silicate, and when n is 1 or more, it is referred to as amorphous sodium silicate. Sodium silicate is classified into No. 1, No. 2, No. 3 and No. 4 by the molar ratio. In general, No. 3 or No. 4 may be used as the gelling agent for the chemical solution injection.

Figure 1 shows the first stage in which sodium silicate is bonded to each other by Ca < ^{2 +} > to form a straight linear polymer structure, Figure 2 shows that the first stage linear polymer structure of Figure 1 is acid catalyzed The dehydration reaction takes place in the silicate monomer, and the second step is shown in which the polymer forms a reticular polymer and then coagulates.

Many studies have been conducted on gelation for a long time. According to a study by Iler and UKIHASHI, the gelation of sodium silicate is formed by the following process.

In the first step, the silicate monomers are polymerized to form colloidal particles, and in the second step, the particles are polymerized with each other to form a continuous structure, thereby expanding through the solvent to effect coagulation.

That is, in the first step, a polymerization is carried out between sodium silicate to form a linear structure. In the second step, dehydration occurs due to the action of H ⁺ catalyst on the silanol group (Si-OH) Other silicate monomers bind to the generated sites and ultimately grow into siloxane bonds (-Si-O-Si) to form a three-dimensional network structure of gelation.

In addition, the liquid silicate reacts with the polyvalent metal cation almost instantaneously to form a refractory metal silicate. The metal cations generally used are Ca ⁺² , Mg ⁺² , Zn ⁺² , Cu ⁺² , Fe ^+3, etc., and since they react very rapidly with Ca ⁺² , the chloride can be used as a reaction accelerator , And a divalent metal salt is used in the SGR (Space Grouting Rocket system) method.

However, as compared with the acidic reaction promoter, the metal salt easily dissolves or leaches out, which is a phenomenon in which the gelling agent is exposed to water for a long period of time, before the polymerization reaction of sodium silicate occurs. Accordingly, in order to solve such problems, an acidic reaction promoter is used as a reaction accelerator for shortening the gel time.

As shown in FIG. 2, in the present invention, sodium monosilicate monomer was polymerized by selecting [H ⁺ ] as a gelation promoter to overcome the leaching phenomenon.

The binder may be a by-product of cyclic resources consisting of CaSO ₄ , CaSO ₄ H ₂ O, CaSO ₄ 1 / 2H ₂ O, and CaO, either alone or diluted in water, or may contain a carbonate or inorganic hydrate One additive is diluted with water.

The carbonate may include at least one selected from the group consisting of sodium carbonate, potassium carbonate, calcium carbonate, magnesium carbonate, and barium carbonate. The amount of the carbonate to be used may vary depending on the desired gelling time by the gelling agent and the binder, .

The inorganic hydrogencarbonate is selected from the group consisting of sodium monohydrogenphosphate, sodium dihydrogenphosphate, potassium dihydrogenphosphate, potassium dihydrogenphosphate or sodium hydrogenphosphate, potassium hydrogen sulfate, methyl hydrogen sulfate, ethyl hydrogen sulfate, hydrogen sulphate The amount of the inorganic hydrogen salt used varies depending on the gelling time desired by the gelling agent and the binder.

The binder preferably further comprises Portland cement, blast furnace slag cement, fly ash cement, and silica fume, which is a pozzolan-reactive material.

Example 1

4 kg of sodium hydrogen sulfate was added to 100 kg of sodium silicate No. 3 and 430 L of diluted water and mixed with 200 kg of a binder mainly containing calcium sulfate as a main component and 430 L of diluted water to prepare a chemical liquid composition.

The gelation time was measured by mixing each of the gelling agents and binders thus prepared, and the compressive strength was measured according to the ages of the specimens prepared by the cube mold. The degree of leaching was measured by immersing the prepared cube mold in water , And the same test pieces were simultaneously subjected to the same test three times, and the average values were shown in the following Tables 1 and 2.

Comparative Example 1

In Example 1, the same procedure was compared using a gelling agent to which sodium hydrogen sulfate was not added.

Comparative Example 2

The same procedure was used for the same conditions as in Example 1 except that only portland cement was used as a binder.

Comparative Example 3

Under the same conditions as in Example 1, the same procedure was used when 50% of the total weight of the binder was used as the Portland cement.

Example 2

390 L of diluted water and 3% sodium hydrogen sulfate were added to and mixed with 150 kg of sodium silicate No. 3 to form a gelling agent. The gelling agent and calcium sulfate as the main components were mixed with 200 kg of a binder and 430 L of diluted water to prepare a chemical composition The test was conducted under the same conditions as in Example 1.

Comparative Example 4

In Example 2, the same procedure was compared using a gelling agent to which no sodium hydrogen sulfate had been added.

Example 3

To 200 kg of sodium silicate No. 3, 360 L of diluted water and 2% sodium hydrogen sulfate were added and mixed to form a gelling agent. 200 kg of a binder containing the gelling agent and calcium sulfate as a main component and 430 L of diluted water were mixed to prepare a chemical liquid composition The test was carried out under the same conditions as in Example 1.

Comparative Example 5

In Example 3, the same procedure was compared using a gelling agent to which sodium hydrogen sulfate was not added.

Example 4

To 250 kg of sodium silicate No. 3, 320 L of diluted water and 1% of sodium hydrogen sulfate were added and mixed to form a gelling agent. 200 kg of a binding material containing calcium sulfate as a main component and 430 L of diluted water were mixed to prepare a liquid composition, Under the same conditions.

Comparative Example 6

In Example 4, the same procedure was compared using a gelling agent to which sodium hydrogen sulphate was not added.

Example 5

Sodium silicate No. 3 280 kg was mixed with 350 L of diluted water to form a gelling agent. Then, 200 kg of a binding material containing calcium sulfate as a main component was mixed with 430 L of diluted water to prepare a chemical liquid composition and tested under the same conditions as in Example 1.

Examples 6 to 9

The amount of sodium silicate No. 3 as the gelling agent and the dilution number of the gelling agent were changed after fixing the diluting water of the binder and the binder, and the amount of the reaction promoting agent according to the change of the gelation time is shown in Table 1.

Examples 10 to 13

Table 1 shows that the gelling time is shortened with increasing the amount of the reaction promoter after fixing the diluting water of the gelling agent, sodium silicate No. 3, the gelling agent, and the dilution water of the binder and the binder.

Examples 14 to 18

Table 1 shows that there is no significant change in the gelling time even if the diluting water of the gelling agent, sodium silicate 3, the diluting water of the gelling agent, and the dilution number of the binder and the binder are changed after fixing the reaction promoter.

Comparative Examples 7 to 10

Changes in gelation time, strength, and leaching were observed by varying the chemical composition of the binder.

That is, 90% of CaSO ₄ + 10% of CaO is mixed in the composition of the binder in # 1, 30% of CaSO ₄ and 30% of CaO are mixed in the composition of the binder in # 2, , 60% of CaSO ₄ + 40% of CaO is mixed, and in the composition of the binder in # 4, 50% of CaSO ₄ + 50% of CaO is mixed.

Examples 19 to 23

Table 2 below shows that the gelation time was changed by changing the reaction retardant after fixing the sodium silicate No. 3 as the gelling agent, the diluting water of the gelling agent, and the dilution water of the binder and the binder.

In comparison with class approval and Portland cement is formed by using a binder consisting of a main component the above experimental results CaSO _4, were not at all problematic to and control the gel time, except that the strength is somewhat lower, and CaSO ₄ There was no significant difference in compositional change of CaO. Rather, the problem of leaching tended to be reduced and the amount of reaction promoter used decreased.

Sample Silicic acid No.3 Gelling agent
Dilution number Binders Binders
Dilution number Reaction promoter Gel time
(second) 28 day strength
(kg /) Leaching
(ppm) Remarks Kinds usage
(%) Example 1 100 430 200 430 NaHSO ₄ 4 9 15 Less than 50 Comparative Example 1 100 430 200 430 0 - - - Comparative Example 2 100 430 * 200 430 NaHSO ₄ 4 20 24 Below 100 Comparative Example 3 100 430 100 + * 100 430 NaHSO ₄ 4 12 21 Less than 50 Example 2 150 390 200 430 NaHSO ₄ 3 10 17 Less than 50 Comparative Example 4 150 390 200 430 0 - - - Example 3 200 360 200 430 NaHSO ₄ 2 11 18 Less than 50 Comparative Example 5 200 360 200 430 0 120 14 Below 100 Example 4 250 320 200 430 NaHSO ₄ One 12 25 Less than 50 Comparative Example 6 250 320 200 430 0 60 20 Below 100 Example 5 300 280 200 430 NaHSO ₄ 0 15 26 Less than 50 Example 6 100 430 200 430 3 18 17 Below 100 Example 7 200 360 200 430 NaHSO ₄ 3 6 19 Less than 50 Example 8 250 320 200 430 NaHSO ₄ 3 4 - - Example 9 300 280 200 430 NaHSO ₄ 3 2 - - Example 10 100 430 200 430 NaHSO ₄ One 180 14 Below 100 Example 11 100 430 200 430 NaHSO ₄ 2 90 14 Below 100 Example 12 100 430 200 430 NaHSO ₄ 3 30 15 Below 100 Example 13 100 430 200 430 NaHSO ₄ 5 6 15 Less than 50 Example 14 200 360 150 450 NaHSO ₄ 2 11 18 Less than 50 Example 15 200 360 250 420 NaHSO ₄ 2 10 16 Less than 50 Comparative Example 7 200 360 # 250 420 NaHSO ₄ 2 9 18 Less than 50 #One Comparative Example 8 200 360 # 250 420 NaHSO ₄ 2 11 20 Less than 50 #2 Comparative Example 9 200 360 # 250 420 NaHSO ₄ 2 10 19 Less than 50 # 3 Comparative Example 10 200 360 # 250 420 NaHSO ₄ 2 9 17 Less than 50 #4 Example 16 200 360 300 400 NaHSO ₄ 2 9 18 Less than 50 Example 17 200 360 350 380 NaHSO ₄ 2 8 18 Less than 50 Example 18 200 360 400 360 NaHSO ₄ 2 7 18 Less than 50

Sample Silicic acid No.3 Gelling agent
Dilution number Binders Binders
Dilution number Reaction retarder Gel time
(second) 28 day strength
(kg /) Leaching
(ppm) Remarks Kinds usage
(%) Example 19 300 280 300 300 Na ₂ CO ₃ 0 2 - - Example 20 300 280 300 300 Na ₂ CO ₃ One 15 35 Less than 50 Example 21 300 280 350 300 Na ₂ CO ₃ 2 5 45 Less than 50 Example 22 300 280 350 300 Na ₂ CO ₃ 3 12 50 Less than 50 Example 23 300 280 350 300 Na ₂ CO ₃ 4 45 46 Below 100

In Table 1, the cement of Portland cement was used as a binder in the marks * of Comparative Example 2 and Comparative Example 3, and a binder mainly composed of calcium sulfate was used as the binder, The time was not measured as a result of greatly deviating from the standards of purity or completion.

As can be seen from Table 1 and Table 2, it is important that the gelling time is freely controlled in the largest function of the sorbent material. In the case of strength, there is a slight difference depending on the application, but for the purpose of order, 0.5 to 1 MPa And 2 ~ 5 MPa for ground reinforcement purposes.

While the present invention has been described with reference to the exemplary embodiments and the drawings, it is to be understood that the technical scope of the present invention is not limited to these embodiments and that various changes and modifications will be apparent to those skilled in the art. Various modifications and variations may be made without departing from the scope of the appended claims.

Claims

A gelling agent containing sodium silicate; And a binder which is mixed with the gelling agent to produce a filler,
The gelling agent, sodium silicate, is an aqueous solution of Na ₂ O and SiO ₂ , or diluted water diluted in water. To the sodium silicate is added sodium hydrogen sulfate, a reaction accelerator such as sodium hydrogen sulfate, potassium hydrogen sulfate, methyl hydrogen hydrogen sulfate, Ethyl, and hydrogen sulfate, or a reaction retarder,
The binder is composed of a mixture of CaSO ₄ , CaSO ₄ H ₂ O, CaSO ₄ 1 / 2H ₂ O and CaO, either alone or diluted with water, and a carbonate or a reaction accelerator An additive containing an inorganic hydrogencarbonate is further mixed and mixed,
The carbonate which is a reaction retarder as an additive of the binder includes at least one selected from the group consisting of sodium carbonate, potassium carbonate, calcium carbonate, magnesium carbonate and barium carbonate,
Wherein the inorganic hydride salt as a reaction promoter as an additive to the binder comprises at least one selected from the group consisting of sodium hydrogen sulfate, potassium hydrogen sulfate, methyl hydrogen sulfate, ethyl hydrogen sulfate, and hydrogen hydrogen propoxide. .

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The method according to claim 1, SiO ₂ weight ratio of said sodium silicate has chemical grouting composition, characterized in that 1.5 to 4.5 times the Na ₂ O weight ratio.

[6] The method according to claim 4,
Wherein the Na ₂ O is 5 to 15% of the total weight ratio, the SiO ₂ is 15 to 45%, and the binder is 40% or more based on CaSO ₄ .

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2. The connector according to claim 1,
Wherein CaO is 1 to 50% of the total weight ratio, and CaSO ₄ , CaSO ₄ H ₂ O, and CaSO ₄ 1 / 2H ₂ O are mixed in a weight ratio of 1 to 90% , And the weight ratio of the additive is 10% or less of the binder.

delete

2. The connector according to claim 1,
Portland cement, blast furnace slag cement, fly ash cement, and silica fume as a pozzolan reactive material.