KR20200064019A - Calcium aluminate inorganic material and preparation method thereof, and cement composition comprising the same - Google Patents

Abstract

Provided is a method of preparing a calcium aluminate inorganic material. The method of preparing a calcium aluminate inorganic material may comprise the following steps of: mixing a first source material including calcium oxide (CaO) and a second source material including aluminum oxide (Al_2O_3) to prepare a base source; and heat-treating the base source to prepare a calcium aluminate-based inorganic material including a first calcium aluminate inorganic material, and a second calcium aluminate inorganic material having a higher aluminum oxide content than the first calcium aluminate inorganic material.

Description

Calcium aluminate inorganic material and its manufacturing method, and cement composition comprising the same {Calcium aluminate inorganic material and preparation method thereof, and cement composition comprising the same}

The present invention relates to a calcium aluminate inorganic material and a method for manufacturing the same, and a cement composition comprising the same, more specifically, a calcium aluminate inorganic material composed of calcium aluminate inorganic materials having different compositions and a method for manufacturing the same, and the same It is related to the cement composition.

In the construction field, concrete is the most used material because it has excellent properties in terms of economy, formability, and durability compared to other materials. However, concrete is a ceramic material and has high brittleness and low ductility. Therefore, most construction structures are constructed by using rebar together to compensate for the low ductility of concrete.

In general, reinforcing bars used to compensate for the shortcomings of concrete are protected by a passivation film in a concrete environment with a high alkalinity of pH 12-13.5. However, in the environment where the neutralization process in which the pH is lowered due to carbon dioxide (CO ₂ ) in the atmosphere occurs in the vicinity of the rebar or where chlorine ions penetrate from the outside, corrosion of the reinforcing bar is promoted. When corrosion of the reinforcing bar occurs, expansion pressure is generated inside the concrete due to the corrosion product of the reinforcing bar. When the expansion pressure is generated, cracks in the concrete, peeling and peeling of the concrete surface, and the like result in deterioration of structural and durability performance of the reinforced concrete structure. In particular, chloride attack of reinforced concrete occurs frequently around the world and is also a deterioration phenomenon of concrete with high interest.

Among the clinkers of ordinary portland cement (OPC), which contribute to the improvement of salt resistance of reinforcing bar concrete, there is 3CaOAl ₂ O ₃ (C ₃ A). C ₃ A is one of calcium aluminate clinkers, 12CaO·7Al ₂ O ₃ (C ₁₂ A ₇ ), CaO·Al ₂ O ₃ (CA), CaO·2Al ₂ O ₃ (CA ₂ ) and CaO·6Al ₂ Among calcium aluminate inorganics such as O ₃ (CA ₆ ), it exhibits a fairly rapid hydration reaction property and high heat of hydration. Since high heat of hydration can cause temperature cracking in mass concrete, it can be solved by reducing the content of C ₃ A, but there is a disadvantage that salt resistance is reduced.

One technical problem to be solved by the present invention, CA (CaOAl ₂ O ₃ ), CA ₂ (CaO2Al ₂ O ₃ ) And C ₂ AS (2CaOAl ₂ O ₃ SiO ₂ ) high content of calcium aluminate mineral and its production Method, and to provide a cement composition comprising the same.

Another technical problem to be solved by the present invention is to provide a calcium aluminate inorganic salt with improved salt inhibitory properties, a method for manufacturing the same, and a cement composition comprising the same.

Another technical problem to be solved by the present invention is to provide a calcium aluminate inorganic material capable of mass production, a method of manufacturing the same, and a cement composition comprising the same.

The technical problem to be solved by the present invention is not limited to the above.

In order to solve the above-mentioned technical problems, the present invention provides a method for manufacturing a calcium aluminate inorganic material.

According to one embodiment, the method of manufacturing the calcium aluminate inorganic material comprises a first source material comprising calcium oxide (CaO), and a second source material comprising aluminum oxide (Al ₂ O ₃ ) to form a base source. A step of manufacturing, and heat-treating the base source to produce a calcium aluminate-based inorganic material comprising a first calcium aluminate inorganic material and a second calcium aluminate inorganic material having a higher aluminum oxide content than the first calcium aluminate inorganic material Including a step, by controlling the mixing ratio (wt%) of the first source material and the second source material, the proportion of the second calcium aluminate inorganic material (wt%) in the composition of the calcium aluminate-based inorganic material It may include controlling to be higher than the ratio (wt%) of the first calcium aluminate inorganic material.

According to one embodiment, the base source, the first source material of more than 30 wt% and less than 33 wt% and the second source material of more than 66 wt% and less than 69 wt% are mixed, and the calcium aluminate-based inorganic material In the composition of the ratio of the second calcium aluminate inorganic material may include more than 85 wt%.

According to an embodiment, the heat treatment of the base source may include heat-treating the base source at a first temperature to calcinate the base source, and heat-treating the base source at a second temperature higher than the first temperature. Sintering the base source by adding the ratio of the ratio of the first calcium aluminate mineral and the ratio of the second calcium aluminate mineral in the composition of the calcium aluminate-based inorganic material according to the second temperature. It may include what is controlled to more than 97 wt%.

According to one embodiment, the second temperature may include more than 1450 ℃ less than 1550 ℃.

According to an embodiment, the second temperature may be controlled according to a mixing ratio of the first source material and the second source material.

According to an embodiment, when the first source material greater than 29 wt% and less than 31 wt% and the second source material greater than 69 wt% and less than 71 wt% are mixed, the second temperature is controlled to 1550° C. or higher and , When the first source material greater than 31 wt% and less than 36 wt% and the second source material greater than 64 wt% and less than 69 wt% are mixed, the second temperature is controlled to be greater than 1450°C and less than 1550°C can do.

According to another embodiment, the method of manufacturing the calcium aluminate inorganic material is a step of preparing a base source by mixing limestone and bauxite, and heat treating the base source to form a first calcium aluminate inorganic material, And manufacturing a calcium aluminate-based inorganic material comprising a second calcium aluminate inorganic material having a higher calcium oxide content than the first calcium aluminate inorganic material, wherein the calcium aluminate is controlled by controlling the heat treatment temperature of the base source. The proportion of the first calcium aluminate inorganic and the proportion of the second calcium aluminate inorganic in the composition of the nate-based inorganic material may be controlled.

According to another embodiment, the base source may include being controlled to be greater than 1350°C and less than 1500°C.

According to another embodiment, the first calcium aluminate inorganic material may include CA ₂ (CaO ₂ Al ₂ O ₃ ), and the second calcium aluminate inorganic material may include C ₂ AS (2CaOAl ₂ O ₃ SiO ₂ ). .

According to another embodiment, the sum of the proportion of the first calcium aluminate inorganic and the proportion of the second calcium aluminate inorganic in the composition of the calcium aluminate-based inorganic material may include exceeding 70 wt%.

In order to solve the above-described technical problems, the present invention provides a calcium aluminate mineral.

According to an embodiment, the calcium aluminate inorganic material includes a first calcium aluminate inorganic material and a second calcium aluminate inorganic material having a higher aluminum oxide content than the first calcium aluminate inorganic material, and 2 The ratio of the calcium aluminate mineral is higher than the ratio of the first calcium aluminate mineral, and the sum of the ratio of the ratio of the first calcium aluminate mineral and the ratio of the second calcium aluminate mineral to total weight is 90 wt% or more. can do.

According to one embodiment, the first calcium aluminate inorganic is included in a proportion of more than 13.1 wt% and less than 19.1 wt%, the second calcium aluminate inorganic may be included in a proportion of more than 71.5 wt% and less than 85.6 wt% .

According to an embodiment, the first calcium aluminate inorganic material may include CA (CaOAl ₂ O ₃ ), and the second calcium aluminate inorganic material may include CA ₂ (CaO2Al ₂ O ₃ ).

In order to solve the above technical problems, the present invention provides a cement composition.

According to one embodiment, the cement composition may include 5-15 wt% of calcium aluminate mineral, and Portland cement according to the above-described embodiment.

A method of manufacturing a calcium aluminate inorganic material according to an embodiment of the present invention is a base by mixing the first source material containing calcium oxide (CaO) and the second source material comprising aluminum oxide (Al ₂ O ₃ ) Preparing a source, and heat-treating the base source to form a calcium aluminate-based inorganic material comprising a first calcium aluminate inorganic material and a second calcium aluminate inorganic material having a higher aluminum oxide content than the first calcium aluminate inorganic material. Including the step of manufacturing, by controlling the mixing ratio (wt%) of the first source material and the second source material, or by controlling the heat treatment temperature of the base source, the calcium aluminate-based inorganic material containing the agent The composition ratio of 1 calcium aluminate inorganic substance and the 2nd calcium aluminate inorganic substance can be controlled. Accordingly, the cement composition prepared using the calcium aluminate inorganic material according to the embodiment and ordinary Portland cement may have improved chloride resistance.

1 is a flowchart illustrating a method of manufacturing a calcium aluminate inorganic material according to a first embodiment of the present invention.
2 is a view showing a salt resistance mechanism of the cement composition according to an embodiment of the present invention.
3 is a flowchart illustrating a method of manufacturing a calcium aluminate inorganic material according to a second embodiment of the present invention.
4 and 5 are photographs of calcium aluminate minerals according to Example 3-3 of the present invention.
6 and 7 are photographs of a pellet manufacturing process of calcium aluminate inorganic raw materials.
8 is a state diagram of a pilot-sacle test operation of the calcium aluminate inorganic production process according to Example 12 of the present invention.
9 is a photograph of a rotary kiln used in the calcium aluminate inorganic production process according to Example 12 of the present invention.
10 is a photograph and composition graph of a calcium aluminate inorganic material according to Example 12 of the present invention.
11 and 12 is a photograph confirming the salt resistance of the cement composition prepared through a calcium aluminate mineral according to an embodiment of the present invention.
13 is a graph comparing the composition ratio of CA and CA ₂ according to the mixing ratio of limestone and alumina.
14 is a graph comparing the composition ratio of CA and CA ₂ in the calcium aluminate mineral according to Example 3 of the present invention.
15 is a graph comparing the composition ratio of CA and CA ₂ in the calcium aluminate mineral according to Example 4 of the present invention.
16 is a graph measuring the size of limestone and bauxite used in the manufacturing process of calcium aluminate mineral according to Example 6 of the present invention.
17 is a graph comparing the composition ratio of C ₂ AS and CA ₂ in the calcium aluminate mineral according to Example 8 of the present invention.
18 is a graph comparing the composition ratio of C ₂ AS and CA ₂ according to the mixing ratio of limestone and bauxite.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed contents are thorough and complete and that the spirit of the present invention is sufficiently conveyed to those skilled in the art.

In the present specification, when a component is referred to as being on another component, it means that it may be formed directly on another component, or a third component may be interposed between them. In addition, in the drawings, the thickness of the films and regions are exaggerated for effective description of the technical content.

In addition, in various embodiments of the present specification, terms such as first, second, and third are used to describe various components, but these components should not be limited by these terms. These terms are only used to distinguish one component from another component. Therefore, what is referred to as the first component in one embodiment may be referred to as the second component in another embodiment. Each embodiment described and illustrated herein also includes its complementary embodiment. In addition, in this specification,'and/or' is used to mean including at least one of the components listed before and after.

In the specification, a singular expression includes a plural expression unless the context clearly indicates otherwise. Also, terms such as “include” or “have” are intended to indicate the presence of features, numbers, steps, elements, or combinations thereof described in the specification, and one or more other features, numbers, steps, or configurations. It should not be understood as excluding the possibility of the presence or addition of elements or combinations thereof. In addition, in the present specification, “connecting” is used in a sense to include both indirectly connecting a plurality of components, and directly connecting.

In addition, in the following description of the present invention, when it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

1 is a flow chart illustrating a method of manufacturing a calcium aluminate inorganic material according to a first embodiment of the present invention, Figure 2 is a view showing a salt resistance mechanism of the cement composition according to an embodiment of the present invention.

Referring to Figure 1, the method of manufacturing a calcium aluminate inorganic material according to the first embodiment of the present invention, the step of preparing a base source by mixing a first source material and a second source material (S110), and the base source It may include a step of preparing a calcium aluminate-based inorganic material by heat treatment (S120). Hereinafter, each step will be described in detail.

In step S110, the first source material and the second source material may be mixed to produce the base source. According to one embodiment, the first source material may include calcium oxide (CaO). For example, the first source material may include limestone. Alternatively, the second source material may include aluminum oxide (Al ₂ O ₃ ). For example, the second source material may include calcined alumina for sintering.

According to one embodiment, the base source may be prepared by wet mixing. Specifically, the base source may be prepared by mixing the first source material, the second source material, and water (H ₂ O). In this case, water (H ₂ O) may be mixed at 20 to 25 wt% based on the total weight of the first source material and the second source material. Thereafter, the first source material, the second source material, and the material in which the water is mixed may be dried in a polyethylene container for 24 hours at a temperature of about 100°C.

According to another embodiment, the base source may be prepared by dry mixing. Specifically, the base source may be prepared by mixing the first source material and the second source material at a speed of 200 rpm through a steel ball of 10 mm in a ball mill.

In step S120, the base source may be heat treated. Accordingly, the calcium aluminate inorganic material according to the first embodiment may be prepared. According to an embodiment, the heat treatment of the base source may include heat-treating the base source at a first temperature to calcinate the base source, and heat-treating the base source at a second temperature higher than the first temperature. It may include the step of sintering (sintering) the base source. More specifically, the base source is heated at a rate of 10°C/min in an electric furnace, heat-treated for 1 hour at a temperature of 900°C, and calcined, and heat-treated for 30 minutes at a temperature of 1300°C to 1500°C. It can be sintered.

The calcium aluminate inorganic material may include a first calcium aluminate inorganic material and a second calcium aluminate inorganic material. According to an embodiment, the second calcium aluminate inorganic material may have a higher aluminum oxide (Al ₂ O ₃ ) content than the first calcium aluminate inorganic material. For example, the first calcium aluminate inorganic material may include CA (CaOAl ₂ O ₃ ). Alternatively, the second calcium aluminate inorganic material may include CA ₂ (CaO ₂ Al ₂ O ₃ ).

That is, by mixing calcined alumina and calcined alumina for sintering and heat treatment, calcium aluminate minerals including CA(CaOAl ₂ O ₃ ) and CA ₂ (CaO ₂ Al ₂ O ₃ ) can be prepared.

According to one embodiment, in the base source manufacturing step, the mixing ratio of the first source material (limestone) and the second source material (alumina) is controlled so that the first calcium aluminate contained in the calcium aluminate inorganic material is controlled. The composition ratio of the inorganic material (CA) and the second calcium aluminate inorganic material (CA ₂ ) may be controlled.

For example, the first source material of greater than 30 wt% and less than 33 wt% and the second source material of greater than 66 wt% and less than 69 wt% may be controlled in the base source manufacturing step. In this case, the ratio of the second calcium aluminate inorganic material in the composition of the calcium aluminate inorganic material may be controlled to 85 wt% or more. Accordingly, the chloride resistance of the cement composition described below can be improved.

In addition, according to one embodiment, the second temperature is controlled in the sintering step of the base source, the first calcium aluminate inorganic (CA) and the second calcium aluminate inorganic (containing the calcium aluminate inorganic) ( The composition ratio of CA ₂ ) can be controlled.

For example, in the sintering step of the base source, the second temperature may be controlled to be greater than 1450°C and less than 1550°C. In this case, the sum of the ratio of the first calcium aluminate mineral and the ratio of the second calcium aluminate mineral in the composition of the calcium aluminate mineral may be controlled to be 97 wt% or more. Accordingly, the chloride resistance of the cement composition described below can be improved.

Further, according to an embodiment, the second temperature in the sintering step of the base source may be controlled according to the mixing ratio of the first source material and the second source material mixed in the base source manufacturing step. have.

For example, when the first source material greater than 29 wt% and less than 31 wt% and the second source material greater than 69 wt% and less than 71 wt% are mixed, the second temperature may be controlled to 1550°C or higher. have. Alternatively, when the first source material greater than 31 wt% and less than 36 wt% and the second source material greater than 64 wt% and less than 69 wt% are mixed, the second temperature is controlled to be greater than 1450°C and less than 1550°C. Can be. In this case, the sum of the ratio of the first calcium aluminate mineral and the ratio of the second calcium aluminate mineral in the composition of the calcium aluminate mineral may be controlled to 80 wt% or more. Accordingly, the chloride resistance of the cement composition described below can be improved. Detailed description of the improvement of the chlorine resistance of the cement composition will be described later.

The calcium aluminate inorganic material according to the first embodiment may be used as a cement composition together with OPC. In the case of the cement composition, salt resistance may be improved by the calcium aluminate inorganic material.

More specifically, the calcium aluminate mineral according to the first embodiment including CA ₂ and CA, as shown in FIG. 2, can form the AFm phase in the Ca(OH) ₂ environment (Portland cement environment). have. Accordingly, the calcium aluminate mineral through ion exchange reaction of chloride ion (Cl ^-) and secure the carbonate ion (CO ₃ ^2-) and hydroxide ions (OH ^-) can be discharged. Due to this, the cement composition including the calcium aluminate inorganic material and Portland cement according to the first embodiment may improve salt resistance by fixing chlorine ions penetrating into concrete.

As a result, the higher the content of the first calcium aluminate inorganic (CA) and the second calcium aluminate (CA ₂ ) in the composition of the calcium aluminate inorganic, the cement composition may have a high salt resistance. In particular, the higher the content of the second calcium aluminate (CA ₂ ) in the composition of the calcium aluminate inorganic material, the cement composition may have high salt resistance.

Accordingly, as described above, by controlling the mixing ratio of the first source material and the second source material, or by controlling the second temperature at which the base source is sintered, it is possible to improve the salt resistance of the cement composition. .

However, when the content of the calcium aluminate mineral according to the first embodiment in the cement composition is excessively high, due to the low hydration reactivity of the calcium aluminate inorganic, a problem that the compressive strength of the cement composition may be lowered have. On the contrary, when the content of the calcium aluminate inorganic material according to the first embodiment in the cement composition is excessively low, a problem that does not have the above-described salt resistance resistance may be generated. Accordingly, in order to improve not only salt resistance but also compressive strength of the cement composition, the content of the calcium aluminate inorganic material according to the first embodiment in the cement composition must be controlled. Specifically, when the weight of the calcium aluminate inorganic material according to the first embodiment compared to the total weight of the cement composition is controlled to 5 to 15 wt%, salt resistance can be improved as well as compressive strength of the cement composition. .

A method of manufacturing a calcium aluminate inorganic material according to a first embodiment of the present invention is a mixture of the first source material containing calcium oxide (CaO) and the second source material comprising aluminum oxide (Al ₂ O ₃ ) To prepare a base source, and heat-treating the base source to form a calcium aluminate system comprising a first calcium aluminate inorganic material and a second calcium aluminate inorganic material having a higher aluminum oxide content than the first calcium aluminate inorganic material Including the step of manufacturing an inorganic material, by controlling the mixing ratio (wt%) of the first source material and the second source material, or by controlling the heat treatment temperature of the base source, the calcium aluminate-based inorganic is included Composition ratios of the first calcium aluminate inorganic material and the second calcium aluminate inorganic material may be controlled. Accordingly, the cement composition prepared using the calcium aluminate inorganic material according to the first embodiment and ordinary Portland cement may have improved chloride resistance.

As described above, the calcium aluminate inorganic material according to the first embodiment of the present invention and a method of manufacturing the same have been described. Hereinafter, the calcium aluminate inorganic material according to the second embodiment of the present invention and a method of manufacturing the same are described.

3 is a flowchart illustrating a method of manufacturing a calcium aluminate inorganic material according to a second embodiment of the present invention.

Referring to FIG. 3, a method of manufacturing a calcium aluminate mineral according to a second embodiment of the present invention comprises: preparing a base source by mixing limestone and bauxite (S210), and the base The heat treatment of the source may include the step of preparing a calcium aluminate-based inorganic material (S220). Hereinafter, each step will be described in detail.

In the step S210, the limestone (limestone) and bauxite (bauxite) may be mixed to prepare the base source. According to one embodiment, the base source may be prepared by wet mixing. Specifically, the base source may be prepared by mixing limestone, bauxite, and water (H ₂ O). In this case, water (H ₂ O) may be mixed at 20 to 25 wt% based on the total weight of limestone and bauxite. Subsequently, the limestone, bauxite, and water-mixed material may be placed in a polyethylene container and dried at a temperature of about 100° C. for 24 hours.

According to another embodiment, the base source may be prepared by dry mixing. Specifically, the base source may be prepared by mixing limestone and bauxite at a speed of 200 rpm through a 10 mm steel ball in a ball mill.

In step S220, the base source may be heat treated. Accordingly, the calcium aluminate inorganic material according to the second embodiment may be prepared. According to an embodiment, the heat treatment of the base source may include heat-treating the base source at a first temperature and calcining the base source, and heat-treating the base source at a second temperature higher than the first temperature. It may include the step of sintering (sintering) the base source. More specifically, the base source is heated at a rate of 10°C/min in an electric furnace, heat-treated for 1 hour at a temperature of 900°C, and calcined, and heat-treated for 30 minutes at a temperature of 1300°C to 1500°C. It can be sintered.

The calcium aluminate inorganic material may include a first calcium aluminate inorganic material and a second calcium aluminate inorganic material. According to one embodiment, the second calcium aluminate inorganic material is more calcium oxide than the first calcium aluminate inorganic material. The content of (CaO) may be higher. For example, the first calcium aluminate inorganic material may include CA ₂ (CaO ₂ Al ₂ O ₃ ). Alternatively, the second calcium aluminate inorganic material may include C ₂ AS (2CaOAl ₂ O ₃ SiO ₂ ).

That is, by mixing limestone and bauxite and heat treatment, calcium aluminate minerals including CA ₂ (CaO ₂ Al ₂ O ₃ ) and C ₂ AS (2CaOAl ₂ O ₃ SiO ₂ ) can be prepared.

According to one embodiment, the second temperature is controlled in the sintering step of the base source, the first calcium aluminate inorganic (CA ₂ ) and the second calcium aluminate inorganic (C) included in the calcium aluminate inorganic The composition ratio of ₂ AS) can be controlled.

For example, in the sintering step of the base source, the second temperature may be controlled to 1350°C and less than 1500°C. In this case, the sum of the ratio of the first calcium aluminate mineral and the ratio of the second calcium aluminate inorganic in the composition of the calcium aluminate inorganic may be controlled to 70 wt% or more. Accordingly, the chloride resistance of the cement composition described below can be improved.

The calcium aluminate inorganic material according to the second embodiment may be used as a cement composition together with OPC. In the case of the cement composition, salt resistance may be improved by the calcium aluminate inorganic material.

More specifically, the calcium aluminate inorganic material according to the second embodiment including C ₂ AS and CA ₂ may form an AFm phase in a Ca(OH) ₂ environment (Portland cement environment). Accordingly, the calcium aluminate mineral through ion exchange reaction of chloride ion (Cl ^-) and secure the carbonate ion (CO ₃ ^2-) and hydroxide ions (OH ^-) can be discharged. For this reason, the cement composition comprising the calcium aluminate inorganic material and Portland cement according to the second embodiment may improve salt resistance by fixing chlorine ions penetrating into concrete.

As a result, the higher the content of the first calcium aluminate inorganic (CA ₂ ) and the second calcium aluminate (C ₂ AS) in the composition of the calcium aluminate inorganic, the cement composition may have a high salt resistance have. Accordingly, as described above, the salt resistance of the cement composition can be improved by controlling the second temperature at which the base source is sintered.

However, when the content of the calcium aluminate mineral according to the second embodiment in the cement composition is excessively high, due to the low hydration reactivity of the calcium aluminate inorganic, a problem that the compressive strength of the cement composition may be lowered have. On the contrary, when the content of the calcium aluminate inorganic material according to the second embodiment in the cement composition is excessively low, a problem that does not have the above-described salt resistance resistance may be generated. Accordingly, in order to improve not only salt resistance but also compressive strength of the cement composition, the content of the calcium aluminate inorganic material according to the second embodiment in the cement composition must be controlled. Specifically, when the weight of the calcium aluminate inorganic material according to the second embodiment compared to the total weight of the cement composition is controlled to 5 to 15 wt%, it is possible to improve not only salt resistance resistance but also compressive strength of the cement composition. .

A method of manufacturing a calcium aluminate mineral according to a second embodiment of the present invention comprises the steps of preparing a base source by mixing limestone and bauxite, and heat treating the base source to heat the first calcium aluminate Comprising the steps of producing a calcium aluminate-based inorganic material, and a second calcium aluminate inorganic material having a higher content of calcium oxide than the first calcium aluminate inorganic material, by controlling the heat treatment temperature of the base source, the The composition of the calcium aluminate-based inorganic material may include controlling the proportion of the first calcium aluminate inorganic material and the proportion of the second calcium aluminate inorganic material. Accordingly, the cement composition prepared using the calcium aluminate inorganic material and the ordinary Portland cement according to the second embodiment may improve chloride resistance.

Hereinafter, the calcium aluminate inorganic material according to the second embodiment of the present invention and a method of manufacturing the same have been described. Hereinafter, specific experimental examples and properties evaluation results of the calcium aluminate inorganic material and the cement composition containing the same according to an embodiment of the present invention will be described.

Preparation of calcium aluminate mineral according to Example 1

A base source was prepared by mixing 29.97 wt% of limestone, 70.03 wt% of calcined alumina for sintering, and water, and placed in a polyethylene container and dried at a temperature of about 100° C. for 24 hours.

Then, the dried base source is heated at a rate of 10°C/min in an electric furnace, calcined for 1 hour at a temperature of 900°C, and sintered for 30 minutes at a temperature of 1550°C, Example 1 Calcium aluminate mineral according to was prepared.

Preparation of calcium aluminate mineral according to Example 2

A base source was prepared by mixing 30.64 wt% limestone, 69.36 wt% calcined alumina for sintering, and water, and placed in a polyethylene container and dried at a temperature of about 100° C. for 24 hours.

Then, the dried base source is heated at a rate of 10°C/min in an electric furnace, calcined for 1 hour at a temperature of 900°C, and sintered for 30 minutes at a temperature of 1550°C, Example 2 Calcium aluminate mineral according to was prepared.

Preparation of calcium aluminate mineral according to Example 3

A base source was prepared by mixing 31.97 wt% of limestone, 68.03 wt% of calcined alumina for sintering, and water, and placed in a polyethylene container and dried at a temperature of about 100° C. for 24 hours.

Thereafter, the dried base source is heated in an electric furnace at a rate of 10° C./min, calcined for 1 hour at a temperature of 900° C., and 30 minutes at a temperature of 1400° C., 1450° C., 1500° C., and 1550° C. During the sintering (sintering), a calcium aluminate inorganic material according to Example 3 was prepared. Calcium aluminate minerals prepared at a temperature of 1400°C are defined as Example 3-1, and calcium aluminate minerals prepared at a temperature of 1450°C are defined as Example 3-2, and calcium prepared at a temperature of 1500°C. The aluminate mineral is defined as Example 3-3, and the calcium aluminate mineral prepared at a temperature of 1550° C. is defined as Example 3-4.

Preparation of calcium aluminate mineral according to Example 4

A base source was prepared by mixing 33.92 wt% of limestone, 66.08 wt% of calcined alumina for sintering, and water, and placed in a polyethylene container and dried at a temperature of about 100° C. for 24 hours.

Thereafter, the dried base source is heated in an electric furnace at a rate of 10° C./min, calcined for 1 hour at a temperature of 900° C., and 30 minutes at a temperature of 1400° C., 1450° C., 1500° C., and 1550° C. During the sintering (sintering), a calcium aluminate inorganic material according to Example 4 was prepared. Calcium aluminate mineral prepared at a temperature of 1400 °C is defined as Example 4-1, calcium aluminate mineral prepared at a temperature of 1450 °C is defined as Example 4-2, and calcium prepared at a temperature of 1500 °C The aluminate mineral is defined as Example 4-3, and the calcium aluminate mineral prepared at a temperature of 1550° C. is defined as Example 4-4.

Preparation of calcium aluminate mineral according to Example 5

A base source was prepared by mixing 35.84 wt% limestone, 64.16 wt% calcined alumina for sintering, and water, and placed in a polyethylene container and dried at a temperature of about 100° C. for 24 hours.

Thereafter, the dried base source is heated in an electric furnace at a rate of 10° C./min, calcined for 1 hour at a temperature of 900° C., and 30 minutes at a temperature of 1400° C., 1450° C., 1500° C., and 1550° C. During the sintering (sintering), a calcium aluminate inorganic material according to Example 5 was prepared. Calcium aluminate mineral prepared at a temperature of 1400 °C is defined as Example 5-1, calcium aluminate mineral prepared at a temperature of 1450 °C is defined as Example 5-2, and calcium prepared at a temperature of 1500 °C The aluminate mineral is defined as Example 5-3, and the calcium aluminate mineral prepared at a temperature of 1550° C. is defined as Example 5-4.

Preparation of calcium aluminate mineral according to Example 6

A base sauce was prepared by mixing 63.22 wt% limestone, 36.78 wt% bauxite, and water, and placed in a polyethylene container and dried at a temperature of about 100° C. for 24 hours.

Thereafter, the dried base source is heated in an electric furnace at a rate of 10° C./min, calcined for 1 hour at a temperature of 900° C., and 30 minutes at a temperature of 1300° C., 1350° C., 1400° C., and 1500° C. During the sintering (sintering), a calcium aluminate inorganic material according to Example 6 was prepared. Calcium aluminate minerals prepared at a temperature of 1300°C are defined as Example 6-1, calcium aluminate minerals prepared at a temperature of 1350°C are defined as Example 6-2, and calcium prepared at a temperature of 1400°C The aluminate mineral is defined as Example 6-3, and the calcium aluminate mineral prepared at a temperature of 1500° C. is defined as Example 6-4.

Preparation of calcium aluminate mineral according to Example 7

A base sauce was prepared by mixing 56.76 wt% of limestone, 43.24 wt% of bauxite, and water, and placed in a polyethylene container and dried at a temperature of about 100° C. for 24 hours.

Then, the dried base source is heated at a rate of 10°C/min in an electric furnace, calcined for 1 hour at a temperature of 900°C, and sintered for 30 minutes at a temperature of 1400°C, Example 7 Calcium aluminate mineral according to was prepared.

Preparation of calcium aluminate mineral according to Example 8

A base source was prepared by mixing 51.22 wt% of limestone, 48.78 wt% of bauxite, and water, and placed in a polyethylene container and dried at a temperature of about 100° C. for 24 hours.

Thereafter, the dried base source is heated in an electric furnace at a rate of 10° C./min, calcined for 1 hour at a temperature of 900° C., and 30 minutes at a temperature of 1300° C., 1350° C., 1400° C., and 1500° C. During the sintering (sintering), a calcium aluminate mineral according to Example 8 was prepared. Calcium aluminate mineral prepared at a temperature of 1300°C is defined as Example 8-1, and calcium aluminate mineral prepared at a temperature of 1350°C is defined as Example 8-2, and calcium prepared at a temperature of 1400°C. The aluminate mineral is defined as Example 8-3, and the calcium aluminate mineral prepared at a temperature of 1500° C. is defined as Example 8-4.

Preparation of calcium aluminate mineral according to Example 9

A base source was prepared by mixing 53.85 wt% limestone, 46.15 wt% bauxite, and water, and placed in a polyethylene container and dried at a temperature of about 100° C. for 24 hours.

Thereafter, the dried base source is heated in an electric furnace at a rate of 10° C./min, calcined for 1 hour at a temperature of 900° C., and 30 minutes at a temperature of 1300° C., 1350° C., 1400° C., and 1500° C. During sintering, a calcium aluminate inorganic material according to Example 9 was prepared. Calcium aluminate minerals prepared at a temperature of 1300°C are defined as Example 9-1, calcium aluminate minerals prepared at a temperature of 1350°C are defined as Example 9-2, and calcium prepared at a temperature of 1400°C The aluminate mineral is defined as Example 9-3, and the calcium aluminate mineral prepared at a temperature of 1500° C. is defined as Example 9-4.

Preparation of calcium aluminate mineral according to Example 10

33.02 wt% of limestone and 66.98 wt% of bauxite were placed in a ball mill and mixed at a rate of 200 rpm using a 10 mm steel ball to prepare a base sauce, placed in a polyethylene container and placed in a polyethylene container at a temperature of about 100°C And dried for 24 hours.

Then, the dried base source is heated at a rate of 10°C/min in an electric furnace, calcined for 1 hour at a temperature of 900°C, and sintered for 3 hours at a temperature of 1400°C, Example 10 Calcium aluminate mineral according to was prepared.

Preparation of calcium aluminate mineral according to Example 11

26.99 wt% of limestone and 73.01 wt% of bauxite were placed in a ball mill and mixed at a rate of 200 rpm using a 10 mm steel ball to prepare a base sauce, placed in a polyethylene container and placed in a polyethylene container at a temperature of about 100°C And dried for 24 hours.

Thereafter, the dried base source was heated in an electric furnace at a rate of 10° C./min, calcined for 1 hour at a temperature of 900° C., and sintered for 3 hours at a temperature of 1400° C., Example 11 Calcium aluminate mineral according to was prepared.

Preparation of calcium aluminate mineral according to Example 12

A base source was prepared by mixing 37.5 wt% limestone, 62.5 wt% calcined alumina for sintering, and water, and placed in a polyethylene container and dried at a temperature of about 100° C. for 24 hours.

Thereafter, the dried base source was heated in a rotary kiln, and sintered for 30 minutes at a temperature of 1400° C. to prepare a calcium aluminate inorganic material according to Example 12.

The specific compositions of calcined alumina, bauxite, and calcined alumina for sintering used in the preparation of calcium aluminate minerals according to Examples 1 to 11 are shown in Table 1 below.

Raw material Limestone Bauxite Alumina Chemical composition (wt%) CaO 54.29 0.81 0.02 Al ₂ O ₃ 0.69 76.59 99.60 SiO ₂ 1.50 15.62 0.12 Fe ₂ O ₃ 0.30 2.00 0.04 MgO 1.11 0.16 - TiO ₂ - 3.90 - Na ₂ O 0.01 0.05 - K ₂ O 0.08 0.24 - SO ₃ 0.02 0.02 - P ₂ O ₅ 0.02 0.31 0.20 Loss on ignition (wt%) 41.90 0.96 -

In addition, the mixing ratio (wt%) molar ratio (molar ratio) of calcined alumina, bauxite, and calcined alumina used in the manufacturing process of the calcium aluminate minerals according to Examples 1 to 11 and the process type (wet or Dry) is summarized through <Table 2> below.

division Mixing ratio (wt%) Molar ratio Process type
(Wet/dry) Limestone Bauxite Alumina Al ₂ O ₃ /CaO SiO ₂ /CaO Example 1 29.97 - 70.03 2.36 0.03 Wet Example 2 30.64 - 69.36 2.29 0.03 Wet Example 3 31.97 - 68.03 2.15 0.03 Wet Example 4 33.92 - 66.08 1.97 0.03 Wet Example 5 35.84 - 64.16 1.81 0.03 Wet Example 6 63.22 36.78 - 0.45 0.16 Wet Example 7 56.76 43.24 - 0.59 0.20 Wet Example 8 51.22 48.78 - 0.74 0.26 Wet Example 9 53.85 46.15 - 0.67 0.23 Wet Example 10 33.02 66.98 - 1.57 0.54 deflation Example 11 26.99 73.01 - 2.10 0.73 deflation

4 and 5 are photographs of calcium aluminate minerals according to Example 3-3 of the present invention.

4 and 5, the calcium aluminate inorganic material according to Example 3-3 in the above before heat treatment (before burning) is photographed and illustrated in FIG. 4, and the sintered state (after sintering) is performed. The calcium aluminate mineral according to Example 3-3 was photographed and shown in FIG. 5. As can be seen in Figures 4 and 5, through the method for preparing a calcium aluminate inorganic material according to Example 3-3, it was confirmed that the calcium aluminate inorganic material was easily formed.

6 and 7 are photographs of a pellet manufacturing process of calcium aluminate inorganic raw materials.

6 and 7, it was confirmed that the pellets of the calcium aluminate inorganic raw material were easily prepared.

8 is a state diagram of a pilot-sacle test operation of the calcium aluminate inorganic production process according to Example 12 of the present invention, Figure 9 is a rotary kiln used in the calcium aluminate inorganic production process according to Example 12 of the present invention 10 is a photograph and composition graph of a calcium aluminate inorganic material according to Example 12 of the present invention.

8 to 10, it was confirmed that the calcium aluminate mineral according to Example 12 was manufactured through a rotary kiln. That is, in the case of the calcium aluminate inorganic material according to an embodiment of the present invention, it can be seen that a mass production process is possible. The composition of the calcium aluminate inorganic material according to Example 12 is summarized through <Table 3> below. Examples 12-1, 12-2, and 12-3 show calcium aluminate inorganics heat-treated at different temperatures.

division Example 12-1 Example 12-2 Example 12-3 Average C ₂ AS 4.2 wt% 5.5 wt% 4.2 wt% 4.6 wt% CA 35.2 wt% 35.1 wt% 36.6 wt% 35.6 wt% CA ₂ 45.8 wt% 49.0 wt% 46.5 wt% 47.1 wt% CA ₆ 0.9 wt% 1.4 wt% 0.8 wt% 1.0 wt% C ₃ A - - - - CAS ₂ - - - - CaO - - - - Al ₂ O ₃ 13.9 wt% 9.0 wt% 11.9 wt% 11.6 wt%

As can be seen through <Table 3>, the calcium aluminate mineral according to Example 12 is mostly composed of CA ₂ and CA ₂ , it was confirmed that the CA ₂ /CA mass ratio is about 1.32.

11 and 12 is a photograph confirming the salt resistance of the cement composition prepared through the calcium aluminate mineral according to an embodiment of the present invention.

11 and 12, after preparing the cement (Plain) according to the comparative example and the cement (A10) according to the embodiment, each cement was immersed in 165 g/L aqueous solution of NaCl for 35 days, and then Penetration depth was measured. The penetration depth of chlorine ion was confirmed by Electron probe micro-analysis (EPMA). OPC was used for the cement according to the comparative example (Plain), and cement (A10) according to the embodiment was usually used for cement containing 90 wt% of Portland cement and 10 wt% of the calcium aluminate mineral according to the above example 12 Became.

11 and 12, it was confirmed that chlorine ions penetrated 13.72 mm in the cement according to the comparative example, but chlorine ions penetrated by 11.50 mm in the cement according to the example. In addition, in the case of the cement according to the embodiment, it was confirmed that most of the penetrated chlorine ions are fixed and appear in a fixed chloride form. As a result, it was found that the cement according to the embodiment of the present invention has high chlorine resistance compared to the cement according to the comparative example.

13 is a graph comparing the composition ratio of CA and CA ₂ according to the mixing ratio of limestone and alumina.

13, after preparing the calcium aluminate inorganic material (sintering temperature is the same as 1550 ℃) according to Example 1, Example 2, Example 3-4, Example 4-4, and Example 5-4 Each composition was measured and shown. The results of FIG. 13 are summarized through <Table 4> below.

division Mixing ratio (wt%) Calcium aluminate mineral composition (wt%) Limestone Alumina CA CA ₂ CA ₆ Al ₂ O ₃ Example 1 29.97 70.03 2.1 78.4 17.2 2.4 Example 2 30.64 69.36 1.6 79.2 17.2 2.0 Example 3-4 31.97 68.03 13.1 85.6 0.4 0.9 Example 4-4 33.92 66.08 22.9 76.2 0.2 0.7 Example 5-4 35.84 64.14 32.8 66.1 0.3 0.8

13 and <Table 4>, when the calcined alumina and calcined alumina for sintering to prepare a calcium aluminate inorganic material, it was confirmed that the ratio of CA and CA ₂ appears high. In addition, it was confirmed that the calcium aluminate inorganic material according to Example 3-4 had the highest CA ₂ composition.

As a result, when the calcined alumina for sintering more than 30 wt% and less than 33 wt% and less than 66 wt% and less than 69 wt%, the composition of CA ₂ contained in the calcium aluminate mineral is as high as 85 wt% or more. You can see it appears.

14 is a graph comparing the composition ratio of CA and CA ₂ in the calcium aluminate mineral according to Example 3 of the present invention.

14, after preparing the calcium aluminate inorganic material according to Examples 3-1, 3-2, 3-3, and 3-4, the respective compositions were measured and shown. The results of FIG. 14 are summarized through <Table 5> below.

division Sintering temperature Calcium aluminate mineral composition (wt%) CA CA ₂ CA+CA ₂
(Total) Example 3-1 1400℃ 19.6 56.9 76.5 Example 3-2 1450℃ 19.1 71.5 90.6 Example 3-3 1500℃ 14.6 82.4 97 Example 3-4 1550℃ 13.1 85.6 98.7

14 and <Table 5>, it was confirmed that as the sintering temperature increased, the composition ratio of CA+CA ₂ gradually increased. However, in the case of the calcium aluminate inorganic material according to Example 3-4 sintered at a temperature of 1550°C, a problem in that the grinding process is difficult due to high abrasion resistance occurred.

Accordingly, in order to prepare a calcium aluminate mineral having a high composition ratio of CA+CA ₂ (97 wt% or more), it can be seen that it is an effective method to control the temperature at which the base source is sintered to more than 1450°C and less than 1550°C. .

15 is a graph comparing the composition ratio of CA and CA ₂ in the calcium aluminate mineral according to Example 4 of the present invention.

15, after preparing the calcium aluminate inorganic material according to Examples 4-1, 4-2, 4-3, and 4-4, the respective compositions were measured and shown. The results of FIG. 15 are summarized through <Table 6> below.

division Sintering temperature Calcium aluminate mineral composition (wt%) CA CA ₂ CA+CA ₂
(Total) Example 4-1 1400℃ 21.7 57.4 79.1 Example 4-2 1450℃ 28 67.6 95.6 Example 4-3 1500℃ 23.7 74.6 98.3 Example 4-4 1550℃ 22.9 76.2 99.1

15 and Table 6, it was confirmed that as the sintering temperature increased, the composition ratio of CA+CA ₂ gradually increased. However, in the case of the calcium aluminate inorganic material according to Example 4-4 sintered at a temperature of 1550° C., a problem in that the grinding process is difficult due to high abrasion resistance has occurred.

Accordingly, in order to prepare a calcium aluminate mineral having a high composition ratio of CA+CA ₂ (97 wt% or more), it can be seen that it is an effective method to control the temperature at which the base source is sintered to more than 1450°C and less than 1550°C. .

16 is a graph measuring the size of limestone and bauxite used in the manufacturing process of calcium aluminate mineral according to Example 6 of the present invention.

Referring to FIG. 16, the sizes of limestone and bauxite used in the manufacturing process of the calcium aluminate mineral according to Example 6 of the present invention are measured and illustrated. As can be seen in Figure 16, it was found that the median of limestone size is 34.05 μm and the median value of bauxite is 19.71 μm.

17 is a graph comparing the composition ratio of C ₂ AS and CA ₂ in the calcium aluminate mineral according to Example 8 of the present invention.

Referring to FIG. 17, after preparing the calcium aluminate minerals according to Examples 8-1, 8-2, 8-3, and 8-4, the respective compositions were measured and shown. The results of FIG. 17 are summarized through <Table 7> below.

division Sintering temperature Calcium aluminate mineral composition (wt%) C ₂ AS CA ₂ C ₂ AS+CA ₂
(Total) Example 8-1 1300℃ 23.5 4.4 27.9 Example 8-2 1350℃ 41.8 30.9 72.7 Example 8-3 1400℃ 42.9 32 74.9 Example 8-4 1500℃ 44.2 50.3 94.5

17 and <Table 7>, it was confirmed that as the sintering temperature increased, the composition ratio of C ₂ AS+CA ₂ increased gradually. However, in the case of the calcium aluminate inorganic material according to Example 8-4 sintered at a temperature of 1500°C, a high abrasion resistance resulted in a problem that the grinding process was difficult.

Accordingly, in order to prepare a calcium aluminate inorganic material having a high composition ratio of C ₂ AS+CA ₂ (70 wt% or more), it is found that it is an effective method to control the temperature of sintering the base source from 1350°C to less than 1500°C. Can be.

18 is a graph comparing the composition ratio of C ₂ AS and CA ₂ according to the mixing ratio of limestone and bauxite.

Referring to FIG. 18, after preparing the calcium aluminate minerals (sintering temperature is the same as 1400°C) according to Example 6-3, Example 7, Example 8-3, and Example 9-3, each composition was measured. It was shown. The results of FIG. 18 are summarized through <Table 8> below.

division Mixing ratio (wt%) Calcium aluminate mineral composition (wt%) Limestone Bauxite C ₂ AS CA ₂ C ₂ AS+CA ₂ (Total) Example 6-3 63.22 36.78 43.5 17.1 60.6 Example 7 56.76 43.24 43.5 27.7 71.2 Example 8-3 51.22 48.78 42.9 32 74.9 Example 9-3 53.85 46.15 41.1 12.5 53.6

As can be seen through Figure 18 and <Table 8>, when preparing a calcium aluminate mineral by mixing limestone and bauxite, it was confirmed that the ratio of C ₂ AS and CA ₂ is high. In addition, it was confirmed that in the case of the calcium aluminate inorganic material according to Example 8-3, the C ₂ AS+CA ₂ composition was highest.

As a result, it can be seen that when the limestone of less than 51.22 wt% and the bauxite of less than 48.78 wt% are mixed, the composition of C ₂ AS+CA ₂ contained in the calcium aluminate mineral is high, 74 wt% or more.

As described above, the present invention has been described in detail using preferred embodiments, but the scope of the present invention is not limited to specific embodiments, and should be interpreted by the appended claims. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

Claims (14)

Preparing a base source by mixing a first source material comprising calcium oxide (CaO) and a second source material comprising aluminum oxide (Al ₂ O ₃ ); And
Heat-treating the base source to produce a calcium aluminate-based inorganic material comprising a first calcium aluminate inorganic material and a second calcium aluminate inorganic material having a higher aluminum oxide content than the first calcium aluminate inorganic material,
By controlling the mixing ratio (wt%) of the first source material and the second source material, a ratio (wt%) of the second calcium aluminate inorganic material in the composition of the calcium aluminate-based inorganic material is the first calcium aluminium. Method for producing a calcium aluminate inorganic material comprising controlling to be higher than the proportion (wt%) of the nate mineral.
According to claim 1,
The base source is a mixture of the first source material greater than 30 wt% and less than 33 wt% and the second source material greater than 66 wt% and less than 69 wt%,
A method for producing a calcium aluminate inorganic material, wherein the ratio of the second calcium aluminate inorganic material in the composition of the calcium aluminate-based inorganic material is 85 wt% or more.
According to claim 1,
The base source heat treatment step,
Calcining the base source by heat treating the base source at a first temperature; And
And sintering the base source by heat treating the base source at a second temperature higher than the first temperature.
Calcium aluminate inorganic material comprising controlling the sum of the ratio of the ratio of the first calcium aluminate inorganic material and the proportion of the second calcium aluminate inorganic material in the composition of the calcium aluminate-based inorganic material according to the second temperature to 97 wt% or more Method of manufacturing.
According to claim 3,
The second temperature is more than 1450 ℃ 1550 ℃ less calcium aluminate method for producing inorganic materials.
According to claim 3,
A method of manufacturing a calcium aluminate inorganic material comprising controlling the second temperature according to a mixing ratio of the first source material and the second source material.
The method of claim 5,
When the first source material greater than 29 wt% and less than 31 wt% and the second source material greater than 69 wt% and less than 71 wt% are mixed, the second temperature is controlled to 1550°C or higher,
When the first source material of more than 31 wt% and 36 wt% or less and the second source material of more than 64 wt% and 69 wt% or less are mixed, the second temperature is controlled to be greater than 1450°C and less than 1550°C. Method for manufacturing calcium aluminate mineral.
A first calcium aluminate inorganic material, and a second calcium aluminate inorganic material having a higher content of aluminum oxide than the first calcium aluminate inorganic material,
The ratio of the second calcium aluminate mineral to the total weight is higher than the ratio of the first calcium aluminate inorganic,
Calcium aluminate inorganic material comprising the sum of the ratio of the ratio of the first calcium aluminate inorganic to the total weight and the ratio of the second calcium aluminate inorganic to 90 wt% or more.
The method of claim 7,
The first calcium aluminate mineral is contained in a proportion of more than 13.1 wt% and less than 19.1 wt%, the second calcium aluminate inorganic is included in a proportion of more than 71.5 wt% and less than 85.6 wt%.
The method of claim 7,
The first calcium aluminate inorganic material includes CA (CaOAl ₂ O ₃ ), and the second calcium aluminate inorganic material comprises CA ₂ (CaO2Al ₂ O ₃ ).
Cement composition comprising 5 to 15 wt% of calcium aluminate mineral according to claim 7, and Portland cement.
Preparing a base source by mixing limestone and bauxite; And
Heat-treating the base source, comprising the steps of preparing a calcium aluminate-based inorganic material comprising a first calcium aluminate inorganic material and a second calcium aluminate inorganic material having a higher calcium oxide content than the first calcium aluminate inorganic material,
A method of manufacturing a calcium aluminate inorganic material comprising controlling the heat treatment temperature of the base source to control the ratio of the first calcium aluminate inorganic material and the second calcium aluminate inorganic material in the composition of the calcium aluminate inorganic material .
The method of claim 11,
The base source is a method of manufacturing a calcium aluminate inorganic material comprising being controlled to more than 1350 ℃ less than 1500 ℃.
The method of claim 11,
The first calcium aluminate inorganic material includes CA ₂ (CaO ₂ Al ₂ O ₃ ), and the second calcium aluminate inorganic material comprises a C ₂ AS (2CaOAl ₂ O ₃ SiO ₂ ) method for producing a calcium aluminate inorganic material.
The method of claim 11,
A method of manufacturing a calcium aluminate water product comprising a sum of a ratio of the ratio of the first calcium aluminate mineral and a ratio of the second calcium aluminate mineral in the composition of the calcium aluminate-based inorganic material.

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