JP2001342050A - Environmental protection cement composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cement composition (inorganic adhesive or caulking material) having excellent environmental clean-up actions such as mildew resistance, antibacterial property, deodorization and the like. SOLUTION: This cement composition is constituted by incorporating a powdered natural stone such as tourmaline, quartz pieces, quartz diorite or the like which has the actions of far infrared radiation, minus ion generation and adsorption into a composition containing a cement substance, cement and aggregates or the mixture of cement, aggregates and other cement additives in an amount of 0.5 to 75 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an environment-friendly cement composition, and more particularly to an environment-friendly cement composition having an environment-purifying action by fungicidal properties, antibacterial properties, deodorizing properties and the like. The present invention relates to an inorganic adhesive effective for bonding concrete, wood, building materials, and plastics, and a joint material for ceramic tiles.

[0002]

2. Description of the Related Art Conventionally, an organic adhesive has been generally used as an adhesive for bonding construction interior materials, but in such an organic adhesive,
As is well known for sick house syndrome and the like, indoor pollution caused by its use has become a major problem. Specifically, such an organic adhesive contains a large amount of volatile organic substances such as formalin which are harmful to the human body, and the organic substances are volatilized, thereby contaminating the interior of the room.

In order to solve such a problem, in an organic adhesive, an organic substance is not dissolved in an organic solvent, but is dispersed in water to emulsify the organic substance or increase the boiling point of the organic substance. Although it has been practiced to reduce the amount of volatile organic substances by the method described above, in the case of organic adhesives mainly composed of organic substances, there is a limit to reducing the volatilization of organic substances. And it is still not enough. Also, even if it is possible to sufficiently reduce volatile components, the organic adhesive itself causes volatilization of organic substances,
The ability to absorb or remove such organic substances, that is, the ability to purify the indoor environment, that is, the action of purifying air, has never been desired. Under such circumstances, the development of environmentally friendly adhesives has been desired. It is.

On the other hand, the joint material of ceramic tiles has a problem that discoloration is apt to occur due to generation of mold and adhesion of contaminants such as oil stains. From an aesthetic and aesthetic point of view, this is a significant source of damage to the tiled image. As a countermeasure against such a problem, various antibacterial agents are added to the joint material or the water absorption of the joint material is reduced to prevent the attachment of contaminants. In the case of mixing the agent, since the antibacterial agent is eluted on the surface of the joint material, the antibacterial effect is obtained, so that a permanent antibacterial effect cannot be obtained, and Even when the water absorption rate of the latter is lowered, the adhesion of pollutants is somewhat reduced, but it is hardly sufficient.

Further, Japanese Patent Application Laid-Open No. 2000-73046 proposes a joint material having a photocatalyst such as titanium oxide on its surface in order to prevent the attachment of contaminants. Since the photocatalyst that is present on the surface of the joint works as a catalyst by absorbing light, when such a joint material is always used in a place that is exposed to light, it has excellent anti-mildew properties. Although the action is exhibited for a long time, such excellent action could not be sufficiently realized in a place where light is not irradiated, and the use of such a photocatalyst raises the cost of the joint material. There was a problem that causes.

[0006]

The present invention has been made in view of such circumstances, and has as its solution the problem of environmental purification such as excellent antifungal, antibacterial, and deodorant properties. Another object of the present invention is to provide a cement composition having a long-lasting effect, and another object of the present invention is to provide a cement composition having such excellent properties for bonding an interior material for a building. To provide an inorganic adhesive which can be used as an agent to minimize volatilization of organic substances as much as possible, and remove harmful substances around the adhesive, and thus the entire room, and purify the indoor environment; Furthermore, by using the cement composition having such excellent properties as a joint material of a ceramic tile, it has a fungicidal property, an antibacterial property, and an indoor environment purifying action such as a deodorant property, and has a discoloration effect. Potential ceramic And to provide a vessel tile joint fillers.

[0007]

According to the present invention, in order to solve the problems as described above, a composition containing a cement alone, a cement and an aggregate, or a cement, an aggregate and another cement additive is used. Pulverized powder of natural stone, such as tourmaline ore, quartz schist or quartz diorenite, which has far-infrared radiation, negative ion generation, and adsorption,
The gist of the present invention is an environment-friendly cement composition characterized by being contained at a ratio of 75% by weight.

That is, the present invention provides a cement composition containing a natural stone material having a far-infrared ray radiating action, a negative ion generating action and an adsorbing action, such as tourmaline ore, quartz schist or quartz diorite. However, it has a great feature, and the natural properties of such natural stones, namely, the far-infrared radiation action and the negative ion generation action, and also the adsorption action, prevent the cement composition from being prevented. Therefore, it is possible to effectively exhibit environmental purifying effects such as mold, antibacterial and deodorant properties, thereby suppressing or preventing mold and the like from contaminating the cement composition. The air in the vicinity where the object is used is effectively purified.

[0009] Further, since such a specific natural stone is blended as a crushed powder, the surface in contact with air, such as a cement composition to which a conventional antibacterial agent or the like has been added, has an antibacterial property. There is no such thing that the antibacterial action is lost due to the dissolution and disappearance of the agent, and a permanently excellent environmental purification action can be realized,
Furthermore, since such a crushed powder is made of a natural stone, it also exhibits effective strength and excellent durability.

[0010] According to one preferred embodiment of the environment-friendly cement composition according to the present invention, the quartz schist is preferably a natural ceramic produced in Kitashitara-gun, Aichi Prefecture. The economy can be obtained, and the object of the present invention can be more effectively realized.

In the present invention, an inorganic adhesive made of the above-mentioned environmentally friendly cement composition according to the present invention is also included in the gist of the present invention. Such an inorganic adhesive according to the present invention has excellent antifungal properties as described above,
Since it is composed of an environmentally-friendly cement composition having an environmental purification action such as antibacterial property and deodorant property, if it is used as an inorganic adhesive in the bonding work of building interior materials, the organic substance becomes air. Is prevented from being released into the inside, whereby the occurrence of indoor contamination by the adhesive can be effectively prevented, and furthermore, harmful organic substances released from materials other than the adhesive, such as building materials, can be prevented. It is absorbed or removed, and the room is effectively deodorized and purified.

Further, the gist of the present invention is a joint material for a ceramic tile made of the above-mentioned environmentally friendly cement composition according to the present invention. Since the ceramic tile joint material according to the present invention is made of the environment-friendly cement composition as described above, unlike the conventional joint material to which the antibacterial agent is added, the joint material is permanently resistant to mold. The antibacterial and deodorant properties of the environment are maintained, and discoloration of the joint material due to the adhesion of mold and other contaminants can be advantageously prevented. It is possible to achieve environmental purification in a room where joint materials are used.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the environment-friendly cement composition according to the present invention, by incorporating a specific natural stone material, an environmental purification action such as antifungal property, antibacterial property and deodorizing property is made permanent. In order to develop such an action (characteristic), such a natural stone must have a far-infrared radiation action, a negative ion generation action, and an adsorption action. Is required. In short, here, it is considered that such far-infrared radiation action and negative ion (anion) generation action exert an environmental purification action such as antifungal property and antibacterial property, and where natural stone is porous. Therefore, it is considered that an adsorption effect is exerted, and thereby, a deodorizing property is realized.

In the cement composition according to the present invention, such a natural stone having a far-infrared ray radiating action, a negative ion generating action and an adsorbing action is pulverized by a known suitable pulverizer, It is in powder form and can be incorporated into cement alone, cement and aggregate, or cement and aggregate and other cement additives. Therefore, since such powder does not evaporate or melt, it can permanently realize an excellent environmental purification action. In addition, since the crushed powder is made of a very hard natural stone, it provides high strength and excellent durability to the cement composition, and also plays a role as an aggregate. .

The mixing ratio of the ground powder of the natural stone material is appropriately determined depending on the type of the natural stone to be added and the required purification ability. In addition, the amount of far-infrared radiation and the amount of negative ions generated are determined to be equal to or more than predetermined values, and are generally added at 0.5 to 75% by weight, more preferably at 4 to 50% by weight. Becomes However, if the mixing ratio is less than 0.5% by weight, the effect of adding the compound cannot be sufficiently obtained.
When the content exceeds 75% by weight, not only is it uneconomical, but also the cement content is reduced, and the cement composition functions as a cement composition, specifically, hardens and binds by reaction with water. This is because the function cannot be sufficiently realized.

The particle size of the pulverized powder is of a size conventionally used in aggregates, that is, it can be easily mixed with cement and the like, and when it is kneaded by adding water, Any size may be used as long as the particle size is such that it has a far-infrared radiation effect, a negative ion generation effect, and an adsorption effect. However, when the cement composition according to the present invention is used as an inorganic adhesive or a joint material for tiles, when applying the adhesive using an applicator or the like, or when filling the joint. When carrying out, it is indispensable that it is a size that does not feel uncomfortable, such as ruggedness, and especially, when used for joint material, after joint finish,
It needs to be of a reasonable size to maintain its aesthetics,
Preferably, 0.1 to 100 μm will be advantageously employed.

By the way, as such a special natural stone, any material can be used as long as it has the above-mentioned far-infrared ray radiating action, negative ion generating action and adsorption action. For example, tourmaline ore, quartz schist, quartz diorenite and the like, among them, in particular, tourmaline ore, and natural ceramics, which are quartz schist produced in Kitashitara-gun, Aichi Prefecture, are more preferably employed. It is.

Here, the natural ceramics described above means 10,000 ceramics due to a large-scale crustal deformation that occurred when two plates collided about 20 million years ago.
A type of quartz schist in the Ryoke metamorphic belt on the Median Tectonic Line presumed to have been generated at an ultra-high pressure of 00 atm and an ultra-high temperature. A natural stone that is produced in the surrounding area of Kitashitara-gun, Aichi Prefecture, which has many things, and also has such redox action, negative ion generation action, absorption action by being porous, etc. I have. Such natural ceramics mainly have a mineral composition including quartz, soda feldspar, potassium feldspar, and mica, and the chemical components shown in Table 1, and generally have a negative ion generation amount of 75%.
About 00 / ml, far-infrared emissivity: about 90%.

[0019]

[Table 1]

On the other hand, tourmaline ore is also called tourmaline and is XY ₃ Al ₆ (BO ₃ ) ₃ (Si ₆ O ₁₈ ) (OH) ₄ (X =
Na, Ca, Y = Al, Fe ³⁺ , Li, Mg) A mineral represented by the general formula, which is classified according to the components of X and Y as follows. Among them, black tourmaline is , Far-infrared radiation and negative ions (anions)
It is known to have a generating action and an adsorbing action,
Generally, it has a negative ion generation amount of about 7500 pieces / ml and a far-infrared emissivity of about 93%. Black tourmaline schoorl NaFe ₃ B ₃ Al ₃ (Al ₃ Si ₆ O ₂₇ ) (OH) ₄ Bamboo tourmaline dravite NaMg ₃ B ₃ Al ₃ (Al ₃ Si ₆ O ₂₇ ) (OH) ₄ Lime mould tourmaline uvite CaMg ₃ B ₃ Al ₂ Mg (Al ₃ Si ₆ O ₂₇ ) (OH) ₄ Lithium tourmaline lithia Na (Al, Fe, Li, Mg) ₃ B ₃ Al ₃ (Al ₃ Si ₆ O ₂₇ ) (O, OH, F) _Four

According to the present invention, the pulverized powder of natural stone as described above is contained in a predetermined ratio in simple cement, cement and aggregate, or cement, aggregate and other cement additives. The cement composition is to be prepared.

As the cement used in the present invention as described above, conventionally used cement may be appropriately selected and used, and examples thereof include Portland cement, mixed cement, and alumina cement. Examples include, but are not particularly limited to, Portland cement, and among them, ordinary Portland cement, early-strength Portland cement, or white Portland cement is advantageously used, and the mixing ratio is generally 20 to 80. % By weight, more preferably 30 to
60% by weight will be employed.

In addition, any aggregate can be used as long as it has been conventionally used as an aggregate for cement. Depending on the use of the cement composition, etc.
What is necessary is just to select suitably. Specifically, examples of such aggregates include powdered inorganic materials such as heavy calcium carbonate, cold water, talc, silica, dolomite, and hollow glass beads, and silica sand. Such aggregates have various particle sizes. When the cement composition according to the present invention is used as an adhesive or a joint material, it is preferably 20%.
Particles having a particle size of 0 μm or less are advantageously employed. Further, the compounding amount is desirably 0.5 to 75% by weight.

On the other hand, as other cement additives, organic binders, water retention agents, dispersants, defoamers, cement setting regulators, pigments, and other known additives conventionally added to cement are necessary. In consideration of the use of the cement composition to be used, etc., it is appropriately selected and blended.

By the way, as the above-mentioned organic binder,
It is not particularly limited as long as it can enhance the adhesiveness and cohesiveness of the cement composition. Among them, it is particularly preferable to employ a re-emulsified powder resin. The re-emulsifying resin is obtained by spray-drying an emulsion of an organic resin at a high temperature and pulverizing the resin, and re-emulsifying by adding water. This is because, unlike an organic binder made of a resin, harmful volatile components are eliminated as much as possible. Examples of such re-emulsifying powder resins include EVA copolymer resins, acrylic resins, vinyl acetate resins, acryl vinyl acetate resins, vinyl acetate resins (copolymer resins of vinyl versatate and vinyl acetate), and the like. And any of these can be used. In addition, such an organic binder (re-emulsified powder resin) is to be contained in a cement composition requiring adhesiveness, but when it is added, it is generally 1 to It is desirable to be blended at a ratio of about 50% by weight, preferably about 4 to 30% by weight.

The water-retaining agent may be any one having a water-retaining effect. Specifically, methylcellulose (MC), hexamethylcellulose (HMC), carboxymethylcellulose (CMC), hydroxyethylcellulose (HEC), Hydroxypropyl methylcellulose (HPMC) and polyvinyl alcohol (PV
A) and the like, and any of these can be used. Among them, methyl cellulose (MC), hexamethyl cellulose (HMC), hydroxyethyl cellulose (HEC), and polyvinyl alcohol (PVA) are preferable. When such a water retention agent is employed, it is added at a rate of 0.1 to 10.0% by weight, preferably 0.2 to 3.0% by weight.

The dispersing agent is not particularly limited as long as it can be used as a dispersing agent for cement, but is not limited to metaphosphates such as sodium metaphosphate, ligninsulfonate, and oxycarboxylates. System, a polyol system or the like is suitably used, and when such a dispersant is selected and added, generally 0.01%
To 5.0% by weight, preferably 0.05 to 0.5% by weight
It is blended in the ratio of.

Further, any defoaming agent can be used as long as it has been conventionally used as a cement defoaming agent. Specifically, nonionic and cationic surfactants and water-soluble agents can be used. And the like. When it is added, it is desirable to mix it at a ratio of 0.01 to 5.0% by weight, preferably 0.05 to 0.5% by weight.

As the setting modifier, any one can be used as long as it can achieve the setting of cement. Specifically, oxycarboxylates having an action of delaying the setting of cement are used. Acids and silicofluorides, while those that accelerate the setting (hardening) of cement include calcium salts and chlorides of organic acids, depending on the use and purpose of the cement composition,
It will be decided. In addition, when using such a setting modifier, it is preferable to add 0.01 to 5.0% by weight.

Further, as the pigment, conventionally known pigments can be appropriately used according to the purpose, and are not particularly limited, but triiron tetroxide, titanium oxide and the like are preferably used. Becomes When the cement composition containing such a pigment is used for an adhesive, a joint material, or the like, the particle size is appropriately large, that is, 2 μm.
The thickness is desirably not more than 00 μm, and the mixing amount is not more than 10% by weight.

The cement composition according to the present invention is obtained by a usual method, for example, by stirring and mixing appropriately selected raw materials with a powder stirrer for a sufficient time, In the present invention, an appropriate amount of water is added to the cement composition thus obtained and kneaded, so that the cement composition is advantageously used as an inorganic adhesive or a joint material for ceramic tile.

The inorganic adhesive according to the present invention is used mainly as an adhesive for bonding concrete, wood, building materials, plastics and the like inside a building. Specifically, bonding of insulation, bonding of ceiling boards, bonding of wall boards, ceramic tiles for interior,
It is used for bonding natural stone, bonding plastic floor tiles, long sheets, bonding wooden flooring, and bonding various panels. As described above, the excellent cement composition as described above is used as an adhesive in the bonding work of building interior materials, and the release of organic substances into the atmosphere can be minimized as much as possible. Contaminants generated from other than the inorganic adhesive are advantageously absorbed or removed, whereby environmental pollution by the adhesive is effectively prevented and the indoor environment is advantageously purified.

Further, in the inorganic adhesive according to the present invention, the sound insulation is improved by the pulverized powder of natural stone as a component thereof, and the conventional organic adhesive is used by using an organic binder such as a re-emulsified powder resin. Comparable to system adhesives,
They also enjoyed excellent adhesion performance. In addition, since such an adhesive can be stored in a moisture-proof cement bag, waste materials generated after its use can be disposed of much more easily than organic adhesives.

On the other hand, the jointing material according to the present invention is used mainly as a jointing material for ceramic tiles and natural stones indoors and outdoors of a building, and is made of the above-mentioned environment-friendly cement composition. Unlike the jointing material to which the antibacterial agent is added, the antibacterial property, the antibacterial property, the deodorizing property and the like, the environmental purifying action is permanently maintained. Discoloration can be advantageously prevented, and the environment around the joint material is also advantageously purified.
Besides, from the place where the above-mentioned natural stone is added,
Thus, excellent compression strength and bending strength can be realized.

[0035]

The present invention will be described below in more detail with reference to typical examples of the present invention. However, the present invention is not limited by the description of such examples. It goes without saying that it is not what you receive. In addition, in addition to the following examples, the present invention may further include various changes and modifications based on the knowledge of those skilled in the art without departing from the spirit of the present invention, in addition to the above-described specific description. , Improvements and the like can be added.

First, natural ceramics and pulverized powder of tourmaline ore are prepared as pulverized powders of natural stone materials having a far-infrared radiation action, negative ion generation action and adsorption action, while portland cement and white portland cement are used as cements. Got ready. And, together with them, when used as an inorganic adhesive, an aggregate, a water retention agent, a re-emulsifying powder resin, a dispersant, an antifoaming agent, when used as a joint material, an aggregate, A water retention agent, a setting regulator, and a pigment are mixed so as to have the mixing ratios shown in Table 2 (inorganic adhesive) and Table 3 (joint material), and mixed and stirred by a cement stirring mixer for about 15 minutes. Thus, the cement compositions of Examples 1 to 10 according to the present invention were obtained. On the other hand, for comparison, the cement compositions of Comparative Example 1 (inorganic adhesive) and Comparative Example 2 (joint material), which do not contain any of the ground powder of natural ceramics and tourmaline ore, were mixed with the cement compositions shown in Tables 2 and 3 below. Prepared to be proportions. In the cement composition for an inorganic adhesive shown in Table 2, aggregate: silica sand, calcium carbonate, water retention agent: hydroxypropylmethylcellulose, hydroxyethylcellulose, re-emulsifying powder resin: EVA copolymer resin, dispersant: sodium metaphosphate , An antifoaming agent: a nonionic surfactant, respectively, while, in the cement composition for joint material shown in Table 3, aggregate: silica sand, calcium carbonate, water retaining agent: methylcellulose, setting agent: calcium formate And a pigment: titanium oxide.

[0037]

[Table 2]

[0038]

[Table 3]

Then, after water was added to the cement compositions of Examples 1 to 10 and Comparative Examples 1 and 2 and kneaded, the following various tests were performed, and the results were as follows. The results are shown in Tables 4 to 8 below. In addition, as such a test, for inorganic adhesives, adhesive strength, water-resistant adhesive strength,
Far-infrared emissivity, sound insulation, and odor measurement (ammonia,
(Formaldehyde), and various tests of joint strength, bending strength, compressive strength, odor measurement (ammonia) and mold resistance.

-Adhesive strength test- The inorganic adhesive obtained above (Examples 1 to 4, Comparative Example 1)
A floor material for building interior cut into a size of 40 mm × 40 mm is adhered to a slate board using a slate board, and after curing for 7 days, a uniaxial tensile test is performed using an Autograph AGS-1000A (manufactured by Shimadzu Corporation). The maximum stress up to destruction or peeling was taken as the adhesive strength, and the results obtained are shown in Table 4. In this table, "destruction" indicates that the building material was destroyed, and "peeling" indicates that the building material was peeled off at the bonding surface.

-Water-resistant adhesive strength test- As in the case of the adhesive strength test, a slate board was 40 mm x 40 mm using an inorganic adhesive (Examples 1 to 4 and Comparative Example 1).
glue the floor material for building interior cut to the size of
After curing for one day, further immersion and curing in water for one day, a uniaxial tensile test was performed with an Autograph AGS-1000A (manufactured by Shimadzu Corporation), and the maximum stress until destruction or peeling was measured. The results were shown in Table 4 as the water-resistant adhesive strength. In this table, "destruction" indicates that the building material was destroyed, and "peeling" indicates that the building material was peeled off at the bonding surface.

-Far-infrared emissivity test-The far-infrared emissivity was determined by molding the inorganic adhesives of Examples 1 and 3 and Comparative Example 1 into a size of 40 mm x 40 mm x 5 mm to prepare a test piece. Measurement was requested to the Ceramics Research Laboratory, and the obtained results are shown in Table 4. Here, the far-infrared emissivity is defined as the far-infrared irradiance of the specimen being 4
It is measured between wavelengths of ２０20 μm and is expressed as a percentage relative to an ideal black body (a substance with a far-infrared emissivity of about 100%). As the measurement conditions, a measurement machine: JIR-5300 manufactured by JEOL Ltd., and a measurement temperature: 135 ° C. were used.

-Sound insulation test- Using the inorganic adhesives of Example 1 and Comparative Example 1, a 300 mm x 300 mm flooring material for building interior was applied to a slate board, and the thickness of the adhesive layer was about 5 mm. After that, a 230 g weight was dropped from the height of 7 cm on the floor material, and the sound at that time was measured by a precision sound level meter NA-25 (manufactured by Rion Co., Ltd.). The results are shown in FIG.

[0044]

[Table 4]

-Bending strength test-A joint material (Examples 5 to 10 and Comparative Example 2) was prepared by
After being molded to 0 mm x 70 mm and cured for 28 days, a bending strength test was performed using a universal tensile tester Tensilon UTM10-T (Toyo Baldwin Co., Ltd.), and the maximum stress up to crushing was defined as bending strength. Table 5
It was shown to.

-Compression strength test- A joint material (Examples 5 to 10, Comparative Example 2) was
After being molded into 0 mm x 70 mm and cured for 28 days, a compressive strength test is performed using a universal tensile tester Tensilon UTM10-T (Toyo Baldwin Co., Ltd.), and the maximum stress applied to the test piece until crushing is measured. age,
Table 5 shows the results.

[0047]

[Table 5]

-Odor measurement test-Curing of each adhesive (Examples 1 to 4, Comparative Example 1) and joint material (Examples 5 to 10, Comparative Example 2) molded into a size of 50 mm x 50 mm x 10 mm Along with the product, one drop (about 0.008 g) of a 28% aqueous ammonia solution was used for measuring the odor of ammonia, and 6 ml of saturated steam of a 37% aqueous solution of formalin was used for measuring the odor of formaldehyde, and a 500 ml glass bottle (measurement). ) And measured by a semiconductor scent sensor NS700 / NS710 (manufactured by Keyence Corporation), and the results are shown in Tables 6 and 7. The values in the table are values in which the odor level at 1 minute after the start of the measurement is defined as the standard (100). A value of 100 or more indicates that the odor is stronger, and a value of 100 or less indicates that the odor is weaker than the standard. It is shown that.
The blanks in the table were obtained by performing the odor measurement in the same manner as described above without putting the cured product in the measurement container.

[0049]

[Table 6]

[0050]

[Table 7]

-Mold resistance test- To 100 parts by weight of the cement compositions of Example 5 and Comparative example 2, 33 parts by weight of water was added and kneaded well, each was used as a sample, and potato dextrose agar plate culture was performed. Earth (diameter 9
0mm), cut out the center part in a circular shape,
, Each of which contains five test strains defined in JIS-Z-2911: Aspergillus niger, Penicillium citrinum (P
enicillium citrinum), Rhizopus
oryzae), Cladosporium and Cladosporioides (C
A spore suspension of ladosporium cladosporioides) and ketomium globosum (Chaetomium globosum) is evenly sprayed, and cultured in a constant temperature / humidity chamber at 30 ° C. and 96% RH. The results are shown in Table 8 below. The test piece was a square of about 5 cm per piece.

[0052]

[Table 8]

As is apparent from the results shown in Table 4 above, the natural ceramics having a far-infrared ray radiating action, a negative ion generating action and an adsorbing action, natural ceramics and pulverized powder of tourmaline ore were added. The adhesive strength and the water-resistant adhesive strength of the inorganic adhesive (cement composition) are almost the same as the adhesive strength and the water-resistant adhesive strength of Comparative Example 1 to which none of them is added. No adverse effect on the adhesion was observed. The far-infrared emissivity of the inorganic adhesive (cement composition) of Example 1 to which natural ceramic powder was added was increased by 1.62% from that of Comparative Example 1, and tourmaline powder was added. It was confirmed that the measured value increased by 4.94%. Moreover, from Table 4, it can be confirmed that the inorganic adhesive (cement composition) of Example 1 also improved the sound insulation performance.

As is clear from Table 5, the bending strength and the compressive strength of the joint materials (cement compositions) of Examples 5 to 10 to which pulverized powders of natural ceramics and tourmaline ore were added were as follows. The joint material (cement composition) of Example 7 in which the natural ceramics was added at a ratio of 48% by weight was not lower than the flexural strength and the compressive strength of Comparative Example 2 to which no steel was added. )), Bending strength and compressive strength are about 20
It can be seen that the percentage has improved.

Further, from Tables 6 to 8, it can be confirmed that the adhesive and the joint material according to the present invention have excellent deodorizing and antifungal properties.

[0056]

As is clear from the above description, the cement composition according to the present invention has excellent environmental protection effects such as excellent antifungal property, antibacterial property and deodorant property, and has a long lasting effect. , High strength can be realized. In addition, the inorganic adhesive according to the present invention comprising such a cement composition, when used as an adhesive in the bonding of building interior materials, while having the same adhesiveness as conventional adhesives, and organic This makes it possible to minimize the volatilization of the substance as much as possible and to purify the indoor environment. Furthermore, in the joint material for ceramic tiles according to the present invention, regardless of the presence or absence of light irradiation, it is permanently mold-proof,
It has an indoor environment-purifying action such as antibacterial property and deodorant property, is hardly discolored, and can realize high bending strength and compressive strength.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C04B 24/00 C04B 24/00 24/26 24/26 C // C04B 111: 20 111: 20 (72) Inventor Noriyuki Noguchi 1-58, Shukuto-cho, Nakamura-ku, Nagoya-shi, Aichi F-term (reference) 4C080 AA05 AA07 BB02 BB05 BB06 CC01 HH05 JJ03 KK10 LL10 MM01 NN01 4G012 PA07 PA14 PA23

Claims (5)

[Claims] Claims 1. A composition comprising a cement alone, a cement and an aggregate, or a cement and an aggregate and other cement additives, emits far-infrared radiation such as tourmaline ore, quartz schist, or quartz diorite. An environment-friendly cement composition characterized in that ground stones having a negative ion generating action and an adsorbing action are contained at a ratio of 0.5 to 75% by weight. 2. The environment-friendly cement composition according to claim 1, wherein the quartz schist is a natural ceramic produced in Kitashitara-gun, Aichi Prefecture. 3. The environment-friendly cement composition according to claim 1, wherein the other cement additive is a re-emulsified powder resin. 4. An inorganic adhesive comprising the cement composition according to any one of claims 1 to 3. 5. A joint material for a ceramic tile comprising the cement composition according to claim 1.