KR100854121B1 - Yellow earth mortar composition for underfloor-heating room and manufacture method threreof - Google Patents

Abstract

A loess mortar composition for an underfloor-heating room is provided to prevent harmful materials from being generated from a cement component contained in mortar used as a finishing material. A loess mortar composition for an underfloor-heating room includes 100 parts by weight of a loess mixture and 80-300 parts by weight of water. The loess mixture comprises 40-60wt% of loess, 15-35wt% of aggregate, 4.7-12.2wt% of ash, 3.7-9.2wt% of anhydrous gypsum, 0.6-2.4wt% of an adhesive, 0.1-0.5wt% of a thickener, 0.1-0.5wt% of a plasticizer, 0.3-1.2wt% of a setting retarder, and 0.5-2wt% of a strength improver. The strength improver comprises alumina.

Description

Yellow earth mortar composition for underfloor-heating room and manufacture method threreof

Figure 1 is a flow chart illustrating a method for producing a loess mortar composition for ondol flooring according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

S10: ocher drying S20: ocher decomposition

S30: 1st mixture S40: 2nd mixture

S50: ocher mixture S60: ocher mortar

The present invention relates to a loess mortar composition for ondol flooring and a method for manufacturing the same, and more particularly, to minimize the shrinkage rate of loess mortar and to improve strength without cracking, for ondol flooring used in buildings including ondol floors. It relates to a loess mortar composition and a method for producing the same.

In general, the heating for the ondol is a traditional heating method in Korea with a long history, and the hot water heated by the boiler's heat passes through the floor and evenly heats the entire floor.

Looking at the conventional construction method for the heating for ondol, first install a heat insulator on the top of the bottom surface, and then install a wire mesh on the top of the heat insulator.

Then, heating pipes are arranged on the upper surface of the wire mesh at equal intervals, and finished with a mortar layer to sufficiently cover the heating pipe thereon, and finally, a plastering process is completed.

The mortar is generally used by mixing water with cement, but since the cement mortar is a non-breathable material, there is no ability to control moisture, and the harmfulness of the human body due to the strong alkalinity and the release of radon has been pointed out.

In order to compensate for the above problems, ocher is used as a material of mortar, but in the case of ocher mortar, there is a problem in that cracking occurs due to weak strength and abrasion and a large shrinkage rate during dry shrinkage because it mainly depends on physical bonding. Therefore, there is a need for improvement.

The present invention has been made by the necessity as described above, the object of the present invention is to provide a loess mortar composition for ondol floors for preventing the generation of harmful substances by the cement component contained in the mortar used as a finishing material and its manufacturing method have.

In addition, an object of the present invention is to provide a loess mortar composition for ondol flooring for preventing cracking due to the weak strength and the large shrinkage rate in using mortar using loess and a method of manufacturing the same.

The ocher mortar composition for ondol flooring according to an embodiment of the present invention is: ocher 40 to 60% by weight, aggregate 15 to 35% by weight, calcined lime 4.7 to 12.2% by weight, anhydrous gypsum 3.7 to 9.2% by weight, adhesive 0.6 to 2.4 weight %, Thickening agent 0.1-0.5% by weight, fluidizing agent 0.1-0.5% by weight, coagulation retardant 0.3-1.2% by weight, ocher mixture consisting of strength enhancer 0.5-2% by weight, and water by 80-100 parts by weight of the ocher mixture 300 parts by weight, the strength enhancer is characterized in that it comprises alumina.

Preferably, the aggregate is characterized in that the silica sand of 60 ~ 150 mesh standard.

The adhesive may include 40 to 60 parts by weight of ethylene vinyl acetate (EVA) 40 to 60 parts by weight of polyvinyl alcohol (PVA).

In addition, the thickener includes methyl cellulose (methyl celluose: MC).

The fluidizing agent may include at least one of melamine resins, naphthalene and lignin.

In addition, the coagulation delay agent may include at least one of citric acid, magnesium silicate, potassium silicate and sodium silicate.

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The ocher mortar composition for ondol flooring according to another embodiment of the present invention is: ocher 40 to 60% by weight, aggregate 15 to 35% by weight, calcined lime 4 to 10% by weight, anhydrous gypsum 3 to 7% by weight, cement 1.5 to 4.5 Ocher mixture consisting of weight percent, adhesive 0.6-2.4% by weight, thickener 0.1-0.5% by weight, fluidizing agent 0.1-0.5% by weight, coagulation retardant 0.3-1.2% by weight, strength enhancer 0.5-2% by weight, and the ocher mixture 80 to 300 parts by weight of water based on 100 parts by weight, the strength enhancer is characterized in that it comprises alumina.

Preferably, the aggregate is characterized in that the silica sand of 60 ~ 150 mesh standard.

The adhesive may include 40 to 60 parts by weight of ethylene vinyl acetate (EVA) 40 to 60 parts by weight of polyvinyl alcohol (PVA).

In addition, the thickener includes methyl cellulose (methyl celluose: MC).

The fluidizing agent may include at least one of melamine resins, naphthalene and lignin.

In addition, the coagulation delay agent may include at least one of citric acid, magnesium silicate, potassium silicate, and sodium silicate.

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The method for preparing the underfloor ocher mortar composition according to the present invention comprises: an ocher drying step of drying the soil to have a moisture content of 5% or less, and an ocher grinding step of grinding the dried loess to 0.1 to 0.5 mm or less; The crushed ocher 40-60% by weight, aggregate 15-35% by weight, calcined lime 4.7-12.2% by weight, anhydrous gypsum 3.7-9.2% by weight, adhesive 0.6-2.4% by weight, thickener 0.1-0.5% by weight, fluidizing agent 0.1- Ocher mixture obtaining step of obtaining an ocher mixture consisting of 0.5% by weight, 0.3 ~ 1.2% by weight of coagulation delay agent, and 0.5 ~ 2% by weight of strength enhancing agent, and mixed with 80 to 300 parts by weight of water based on 100 parts by weight of the ocher mixture. To obtain ocher mortar to obtain a,
The fluidizing agent may include at least one or more of the group consisting of melamine resin, naphthalene and lignin, and the strength enhancer may include alumina.

Preferably, in the step of obtaining the ocher mixture, the adhesive, the thickener, the fluidizing agent, the coagulant delaying agent and the strength enhancer are uniformly mixed in the primary mixture in which the ocher, aggregate, slaked lime and anhydrous gypsum are uniformly mixed for 5 to 30 minutes. The secondary mixture mixed for 3 to 15 minutes is mixed to obtain an ocher mixture.

And, the aggregate includes a silica sand of 60 ~ 150 mesh standard, the thickener will include methyl cell (methyl celluose: MC).

The adhesive may include 40 to 60 parts by weight of ethylene vinyl acetate (EVA) 40 to 60 parts by weight of polyvinyl alcohol (PVA).

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In addition, the coagulation delay agent may include at least one of citric acid, magnesium silicate, potassium silicate and sodium silicate.

Hereinafter, a preferred embodiment of the ocher mortar composition for the ondol flooring according to the present invention and a method for producing the same. For convenience of explanation, it will be described taking ocher mortar, which is constructed on the floor of an ondol as an example. The terms to be described below are terms defined in consideration of functions in the present invention, which may vary depending on the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

The ocher mortar composition for underfloor flooring according to an embodiment of the present invention is ocher 40 to 60% by weight, aggregate 15 to 35% by weight, calcined lime 4.7 to 12.2% by weight, anhydrous gypsum 3.7 to 9.2% by weight, adhesive 0.6 to 2.4% by weight , Ocher mixture consisting of 0.1 to 0.5% by weight of a thickener, 0.1 to 0.5% by weight of a fluidizing agent, 0.3 to 1.2% by weight of a coagulation delay agent, and 0.5 to 2% by weight of a strength enhancer, and water of 80 to 300 with respect to 100 parts by weight of the ocher mixture. It is made of parts by weight.

The ocher is preferably used to be crushed to less than 0.1% to 0.5mm after drying to less than 5% moisture content, but less than 0.1 to 0.3mm after being dried to 1 to 3% moisture content of loess It would be more preferable to use ground loess.

The drying and pulverization of the loess is intended to have uniform performance while facilitating mixing with other materials.

The main functions of the ocher have self-cleaning ability and deodorizing ability to maintain a constant humidity and temperature, and sterilize and sterilize harmful microorganisms due to far-infrared radiation of minerals and maintain vitality for beneficial microorganisms. All.

When the ocher is mixed with less than 40% by weight ocher in the ocher mortar it is difficult to have the characteristics of the ocher, and when the ocher is mixed with more than 60% by weight of ocher, the strength of the ocher mortar is weakened, causing a crack.

The aggregate is to use the number 7 sand silicate having a 60 ~ 150 mesh standard, but is not limited to this, may be selectively used one or more of the 6 sand yarn to 8 sand yarn.

The aggregate material is not limited to silica sand, and various materials may be used as the aggregate according to the present invention within the technical spirit for mixing with loess to maintain strength.

The slaked lime is a hardener so that the ocher mortar is cured in a short time to shorten the construction period.

When the calcined lime is less than 4% by weight in the ocher mortar, the effect of hardening cannot be expected, and when the calcined lime is more than 10% by weight, ocher mortar hardens during the pouring operation.

The anhydrous gypsum is characterized in that it comprises at least one or more from the group consisting of natural anhydrous gypsum, anhydrous anhydrous gypsum and calcined anhydrous gypsum as a kind of expansion material.

By the anhydrous gypsum ocher mortar according to an embodiment of the present invention will have an expansion action, and to act to fill the micropores in the ocher mortar.

The expansion material containing the anhydrous gypsum prevents cracking caused by the dry shrinkage of the ocher mortar, preferably 3 to 7% by weight of anhydrous gypsum having such a function, when it exceeds 7% by weight pops on the surface of the ocher mortar Out phenomenon may occur in the shape of a tortoise-like expandable crack, if less than 3% by weight anhydrous gypsum can not be expected to swell.

The adhesive is characterized in that 40 to 60 parts by weight of ethylene vinyl acetate (EVA) 40 to 60 parts by weight of polyvinyl alcohol (PVA) based on 100 parts by weight of the adhesive.

The ethylene vinyl acetate (EVA) is easily blended with high molecular weight, high solids and additives even at low viscosity, and is widely used as a binder for paper or paper tubes and an adhesive for wood.

The polyvinyl alcohol (PVA) is an environmentally friendly water-soluble polymer as a vinyl resin, and is used as a fiber-use, adhesive, papermaking, emulsion stabilizer, etc., and has a wide range of applications such as civil engineering, construction, and ceramics.

Ethylene Vinyl Acetate (EVA) and polyvinyl alcohol (PVA) are 40 to 60 parts by weight of polyvinyl alcohol (Ethylene Vinyl Acetate (EVA)) based on 100 parts by weight of the adhesive. alcohol: PVA) is preferably composed of 40 to 60 parts by weight, more preferably 50 parts by weight of ethylene vinyl acetate (EVA) 50 parts by weight of polyvinyl alcohol (PVA) with respect to 100 parts by weight of the adhesive. .

In addition, the thickener includes methyl cellulose (methyl celluose: MC).

The thickener improves the viscosity of the ocher mortar, cohesion and the like to facilitate the separation of the material and the ocher mortar casting, and also to prevent the material from sticking together.

In addition, the fluidizing agent may be called a water reducing agent, and may include at least one or more of the group consisting of melamine resin, naphthalene and lignin.

In general, in order to facilitate pump pumping of ocher mortar while obtaining sufficient workability, the amount of water in ocher mortar should be large. However, when the amount of water in ocher mortar increases, the possibility of material separation between ocher mixture and aggregate increases. In addition, the pores are increased in the cured product so that the strength decreases, and the shrinkage amount caused by drying increases, thereby increasing the possibility of cracking.

Therefore, a fluidizing agent is used to secure these disadvantages and to impart fluidity and material separation resistance to allow self-leveling control after pouring ocher mortar.

By using the fluidizing agent, only a small amount of water may be used in the ocher mortar, and greatly improves the fluidity and workability of the ocher mortar.

When the thickener is used together with the above-mentioned fluidizing agent at the same time, the viscosity of the ocher mortar mixed with water increases, and thus, the ocher mixture and the aggregate are uniformly formed after ocher mortar pouring because the resistance of material separation between the ocher mixture and the aggregate increases. It is distributed and cured.

Ocher mortar, including such a fluidizing agent and a thickening agent is excellent in fluidity and less material separation, it is possible to control the horizontal surface of the floor by simple surface finishing after casting, forming a good smooth surface.

The fluidizing agent is added 0.1 to 0.5% by weight in the ocher mixture, and if excessively added beyond this, side effects such as coagulation delay, poor curing, material separation and the like.

It is most preferable to use a melamine resin as the fluidizing agent, and the melamine resin does not proceed unless the melamine resin is 65 degrees or more, and a curing catalyst is required at 100 degrees or less.

The melamine resin has excellent water resistance, heat resistance, and aging resistance, and has high adhesive strength.

In addition, the coagulation delay agent may include at least one of citric acid, magnesium silicate, potassium silicate, and sodium silicate.

The coagulation delay agent is a chemical admixture that delays the coagulation and curing process of ocher mortar, and is added to a ready-mixed concrete transporter to enable long-term transportation.

Such a coagulation retardant occupies 0.3 to 1.2% by weight in the ocher mixture, and if excessively added beyond the above-mentioned value, hardening of the ocher mortar occurs, causing excessive air entrainment to cause a decrease in strength, which is less than the above value. In this case, it is difficult to expect the effect of condensation delay.

Most preferably, citric acid is used as the coagulation retardant. The citric acid is a white powder, which dissolves well in water, and is used to maintain freshness of preservatives, sweeteners, surfactants, humectants, warming agents and fruits and fish. .

And, the strength enhancer will include alumina.

The alumina significantly improves the various physical properties of the ocher mortar, and in particular, significantly increases the initial strength, and in the medium to long term, the ocher mortar becomes dense and provides improved durability.

In an embodiment of the present invention, alumina is used as the strength enhancer, but the present invention is not limited thereto, and various materials may be used as the strength enhancer according to the present invention within the technical spirit for enhancing the strength of ocher mortar.

The ocher mortar composition for ondol flooring according to another embodiment of the present invention is the ratio of hydrated lime and anhydrous gypsum in the ondol floor ocher mortar composition according to the one-time adjustment and the composition of the back cement is added.

For the description of the other components in addition to the back cement will be referred to an embodiment of the present invention.

Ocher mortar composition for ondol flooring according to another embodiment of the present invention is ocher 40 to 60% by weight, aggregate 15 to 35% by weight, calcined lime 4 to 10% by weight, anhydrous gypsum 3 to 7% by weight, cement 1.5 to 4.5 weight %, Adhesive 0.6-2.4% by weight, thickener 0.1-0.5% by weight, fluidizing agent 0.1-0.5% by weight, coagulant retardant 0.3-1.2% by weight, strength enhancer 0.5-2% by weight, and ocher mixture 100 It is made of 80 to 300 parts by weight of water with respect to parts by weight.

The back cement is also called white portland cement, and has excellent early strength and durability, and excellent coloring power due to the appearance of whiteness.

The back cement as described above serves as a binder in the ocher mortar, and is preferably mixed in the ocher mixture 1.5 to 4.5% by weight in the ocher mixture in consideration of fluidity and strength.

On the other hand, the manufacturing method of the ocher mortar composition for ondol flooring according to an embodiment of the present invention will be described with reference to the drawings.

Figure 1 is a flow chart illustrating a method for producing a loess mortar composition for ondol flooring according to an embodiment of the present invention.

As shown in FIG. 1, the method for preparing the ocher mortar composition for ondol underfloor according to the present invention has an ocher drying step (S10) of drying the soil so that the moisture content of ocher is 5% or less.

Then, the dried ocher has an ocher milling step (S20) for grinding to 0.1 ~ 0.5mm or less.

Then, the ground ocher 40 to 60% by weight, aggregate 15 to 35% by weight, calcined lime 4.7 to 12.2% by weight, anhydrous gypsum 3.7 to 9.2% by weight, adhesive 0.6 to 2.4% by weight, thickener 0.1 to 0.5% by weight, fluidizing agent It will have a loess mixture obtaining step of obtaining an ocher mixture consisting of 0.1 to 0.5% by weight, 0.3 to 1.2% by weight of a coagulation retardant, and 0.5 to 2% by weight of a strength enhancer.

In order to obtain the ocher mixture, an embodiment in which the respective components are put in one mixer and mixed is possible, but most preferably, the first mixture of the ocher, aggregate, slaked lime and anhydrous gypsum uniformly mixed for 5 to 30 minutes. A mixture (S30) is obtained, and a second mixture (S40), in which the adhesive, the thickener, the fluidizing agent, the coagulation delay agent, and the strength enhancer is uniformly mixed for 3 to 15 minutes, is obtained. The secondary mixture is combined to obtain an ocher mixture (S50).

The mixing time of the primary mixture and the secondary mixture may vary depending on the mixing amount and the working characteristics.

After the primary mixture is uniformly mixed, a relatively small amount of the secondary mixture is mixed with the primary mixture, so that each composition is mixed at a uniform ratio.

When the primary mixture is blended and the secondary mixture is not mixed, the components constituting the primary mixture and the components constituting the secondary mixture are mixed in a single mixer and mixed with a small amount of the secondary mixture evenly. As a result, ocher mortar has non-uniform properties.

Alternatively, after obtaining the primary mixture, the adhesive, the thickener, the fluidizing agent, the coagulation delay agent, and the strength enhancer may be mixed and mixed in one mixer.

In more detail with respect to the material constituting the ocher mixture, the aggregate comprises a silica sand of 60 ~ 150 mesh standard, the thickener comprises methyl cellulose (methyl celluose: MC), the strength enhancer is alumina It will include.

The adhesive may include 40 to 60 parts by weight of ethylene vinyl acetate (EVA) 40 to 60 parts by weight of polyvinyl alcohol (PVA).

The fluidizing agent may include at least one of melamine resins, naphthalene and lignin.

In addition, the coagulation delay agent may include at least one of citric acid, magnesium silicate, potassium silicate, and sodium silicate.

After the ocher mixture obtaining step to have the ocher mortar obtaining step (S60) of mixing the ocher mixture with water to obtain ocher mortar.

The water to be mixed in the ocher mixture is composed of 80 to 300 parts by weight of water with respect to 100 parts by weight of the ocher mixture, the mixing ratio of the water will vary depending on the amount of ocher mortar and the use and use conditions.

The ocher mortar prepared by the composition ratio and manufacturing method as described above is preferably casted to a thickness of 50 mm in order to be used for the floor of the ondol, but is not limited thereto, and the thickness of the ocher mortar depending on the intended use and construction area is Can be increased or decreased.

Ocher mortar made of the composition is made to adhere well to a variety of objects, including the surface and spheres of various building materials, including the ondol floor, even after curing has the advantage that the surface does not crack or dirt from the surface.

That is, the ocher mortar prepared at the blending ratio minimizes the shrinkage of the ocher so that no crack is generated, and when the heating is carried out on the floor of the ondol, a large amount of far-infrared rays are emitted and the temperature between the floor and the ceiling is kept constant. .

In addition, ocher has excellent heat storage property, which has a heat saving effect of about 30% than cement mortar.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand.

In addition, the ocher mortar, which is poured on the ondol floor has been described as an example, but this is merely illustrative, and the loess mortar of the present invention may be used for various objects including various buildings and spheres in addition to the ondol floor.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

As described above, the ocher mortar composition for the underfloor floor according to the present invention and its manufacturing method, unlike the prior invention, the main component of the mortar to the loess to prevent the generation of harmful substances by cement, drying of the ocher mortar By minimizing the time-shrinkage rate, it is possible to provide improved durability by improving strength while preventing cracks from occurring.

Claims (14)

Ocher 40-60 wt%, Aggregate 15-35 wt%, Slaked lime 4.7 ~ 12.2 wt%, Anhydrous gypsum 3.7-9.2 wt%, Adhesive 0.6-2.4 wt%, Thickener 0.1-0.5 wt%, Fluidizing agent 0.1-0.5 wt% It is made of an ocher mixture consisting of 0.3 ~ 1.2% by weight of a coagulation retardant, 0.5 ~ 2% by weight strength enhancer, and 80 to 300 parts by weight of water with respect to 100 parts by weight of the ocher mixture, The strength enhancer ocher mortar composition for the flooring, characterized in that it comprises alumina. Yellow soil 40 to 60% by weight, aggregate 15 to 35% by weight, slaked lime 4 to 10% by weight, anhydrous gypsum 3 to 7% by weight, white cement 1.5 to 4.5% by weight, adhesive 0.6 to 2.4% by weight, thickener 0.1 to 0.5% by weight It is made of an ocher mixture consisting of 0.1 to 0.5% by weight of a fluidizing agent, 0.3 to 1.2% by weight of a coagulation delay agent, and 0.5 to 2% by weight of an strength enhancing agent, and 80 to 300 parts by weight of water, based on 100 parts by weight of the ocher mixture. The strength enhancer ocher mortar composition for the flooring, characterized in that it comprises alumina. The method according to claim 1 or 2, The aggregate is ocher mortar composition for ondol flooring, characterized in that the silica sand of 60 ~ 150 mesh standard. The method according to claim 1 or 2, The adhesive is an ocher mortar composition for underfloor flooring, comprising 40 to 60 parts by weight of ethylene vinyl acetate (EVA) 40 to 60 parts by weight based on 100 parts by weight of an adhesive, polyvinyl alcohol (PVA). . The method according to claim 1 or 2, The thickener ocher mortar composition for ondol flooring, characterized in that it comprises methyl cellulose (methyl celluose: MC). The method according to claim 1 or 2, The fluidizing agent is ocher mortar composition for ondol flooring, characterized in that it comprises at least one or more of the group consisting of melamine resin, naphthalene and lignin. The method according to claim 1 or 2, The coagulation delay agent ocher mortar composition for ondol floors, characterized in that it comprises at least one or more from the group consisting of citric acid, magnesium silicate, potassium silicate and sodium silicate. delete Ocher drying step of drying so that the moisture content of ocher is 5% or less; Ocher grinding step of grinding the dried ocher to 0.1 ~ 0.5mm or less; The crushed ocher 40-60% by weight, aggregate 15-35% by weight, calcined lime 4.7-12.2% by weight, anhydrous gypsum 3.7-9.2% by weight, adhesive 0.6-2.4% by weight, thickener 0.1-0.5% by weight, fluidizing agent 0.1- Ocher mixture obtaining step of obtaining an ocher mixture consisting of 0.5% by weight, 0.3 ~ 1.2% by weight of coagulation delay agent, 0.5 ~ 2% by weight strength enhancer; And It comprises the step of obtaining ocher mortar by mixing 80 to 300 parts by weight of water with respect to 100 parts by weight of the ocher mixture, to obtain ocher mortar, The fluidizing agent includes at least one or more of the group consisting of melamine resin, naphthalene and lignin, The strength enhancer is a method for producing a loess mortar composition for ondol floors characterized in that it comprises alumina. The method of claim 9, In the step of obtaining the ocher mixture, the adhesive, the thickener, the fluidizing agent, the coagulant delaying agent and the strength enhancer are uniformly mixed in the primary mixture in which the ocher, aggregate, slaked lime and anhydrous gypsum are uniformly mixed for 5 to 30 minutes. Method for producing a loess mortar composition for ondol floors characterized in that to obtain a loess mixture by mixing the secondary mixture mixed for a minute. The method according to claim 9 or 10, The aggregate comprises a silica sand of 60 ~ 150 mesh standard, the thickener is a manufacturing method of ocher mortar composition for ondol floors characterized in that it comprises methyl cellulose (methyl celluose: MC). The method according to claim 9 or 10, The adhesive is ocher mortar composition for ondol flooring, characterized in that 40 to 60 parts by weight of ethylene vinyl acetate (EVA) 40 to 60 parts by weight of polyvinyl alcohol (PVA) based on 100 parts by weight of the adhesive Manufacturing method. delete The method according to claim 9 or 10, The coagulation delay agent is a method for producing ocher mortar composition for ondol floors, characterized in that it comprises at least one or more from the group consisting of citric acid, magnesium silicate, potassium silicate and sodium silicate.

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