JPH10121708A - Floor construction method and cement self-leveling material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the effect of preventing cracking at the time of floor construction, cut curing time and reduce cost by solidifying a self-leveling material containing water, a defoaming agent and a specified amount of a rubber latex from the substrate side or inside by heating with a heat medium. SOLUTION: A self-leveling water composition 3 is obtained by adding water and a defoaming agent to a self-leveling material whose base materials include cement, graphite and silica sand and by adding 0.1 to 10wt.% cationic chloroprene emulsion to the base materials. A heat medium 4 is placed on a substrate 1, and after the self-leveling water composition 3 is placed, the heat medium 4 is immediately heated to harden and cure the self-leveling water composition 3. Heating with the heat medium accelerates the networking formation reaction of the polymer of the cationic chloroprene emulsion and thereby prevents cracking in the surface. Thus the hardening time of the self-leveling water composition 3 can be cut and the period of construction can be shortened significantly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a floor construction method and a cement-based self-leveling material.

[0002]

2. Description of the Related Art In the construction of floors using self-leveling materials, measures have been taken to increase the blending amount of water, etc., since the self-leveling aqueous composition requires high fluidity.

[0003]

By the way, in the case of the floor construction method and the self-leveling material as described above, in the process of casting and curing the self-leveling aqueous composition, the evaporation and drying of water and the accompanying processes. There has been a problem that the surface of the self-leveling aqueous composition tends to crack due to shrinkage, and that the curing period is extended.
In particular, in cement-based self-leveling materials that are excellent in water resistance and versatile, dry cracks due to an increase in the amount of water content become remarkable, so that the workability is high, the occurrence of cracks is small, and the curing period is short and low cost. Product development was required.

As measures against cracks, for example, a lime-based expanding material is added as disclosed in JP-A-56-84538, or a lime / gypsum-based expanding material is added as disclosed in JP-A-59-146960. It is suggested that
In any case, it has not yet reached a sufficient crack prevention effect. JP-A-59-35053 discloses that a hemihydrate gypsum having an adjusted particle size is added to a cement-based self-leveling material to slow the rate of production of a reaction product between cement and fly ash, thereby reducing the production of a reaction product. It has been proposed to prevent the occurrence of cracks by making the expansion rate almost the same as the hardening and shrinking rate of cement, but this has not yet achieved a sufficient crack prevention effect. Japanese Patent Application 5-29467
And Japanese Patent Application No. Hei 7-187745 propose that an aggregate is added to a cement-based self-leveling material, but a relatively high crack prevention effect can be obtained as compared with other materials, but the fluidity is poor. Therefore, the workability is poor, and the problem cannot be solved fundamentally.

The present invention has been made in view of the above-mentioned problems, and provides a low-cost floor construction method and a cement-based self-leveling material having high workability, less occurrence of cracks, and a short curing period. The purpose is to do so.

[0006]

The present invention has the following features to attain the object mentioned above. That is, in the invention of claim 1, water and an antifoaming agent are added to a self-leveling material based on cement, fly ash and silica sand, and a rubber-based latex is added as a solid to the base material by 0.1%. A 10% by weight of the self-leveling aqueous composition is added to a base on which a heating medium is laid, and then the self-leveling aqueous composition is heated and cured from the base side or inside with the heating medium. A floor construction method characterized by the following is a means for solving the above problem.

According to the present invention, the cast self-leveling aqueous composition is heated with a heat medium and cured from the underside or inside, thereby suppressing the occurrence of shrinkage distortion during drying and preventing cracks on the surface. To prevent. As the rubber latex, a cationic chloropyrene emulsion or the like is applied.

In addition, the inventors have added water and a defoamer to a self-leveling material based on cement, fly ash and silica sand, and further added a cationic chloropyrene emulsion as a solid to the base material. It has been found that the self-leveling aqueous composition to which .1 to 10% by weight is added is excellent in water resistance after curing and adhesion to the underlying concrete, and also has improved compressive strength and flexural strength. The improvement in the strength is due to the fact that the carbon double bond of the polymer of the cationic chloropyrene emulsion added is linked via a silicon oxide (SiO) or calcium oxide (CaO) metal oxide to form a network. Probable cause. When the solid content of the cationic chloropyrene emulsion is 0.1% by weight or less based on the base material, the strength is insufficient to improve the strength.
Since the fluidity becomes insufficient at 0% by weight or more, the object of the present invention is achieved at 0.1 to 10% by weight.

For example, when the self-leveling material is used as mortar for floor heating, conventionally, a heating medium such as a hot water distribution pipe is laid on a base such as concrete, and a self-leveling aqueous composition is cast thereon. In general, the composition is cured by natural curing, but in the construction method of the present invention, the composition is cured by heating from the base side or inside with a heating medium immediately after the self-leveling aqueous composition according to claim 1 is cast. Let it. When a self-leveling aqueous composition containing 0.1 to 10% by weight of a cationic chloropyrene emulsion added to a base material is cast, the polymer network of the cationic chloroprene emulsion is formed by heating with a heat medium. By accelerating the reaction, cracks on the surface can be completely prevented. As a result, the hardening time and curing period of the self-leveling aqueous composition become less than 24 hours, which can be greatly reduced as compared with about 7 to 10 days in the related art, and several months in some cases. .

According to the second aspect of the present invention, water and an antifoaming agent are added to a self-leveling material based on cement, fly ash and silica sand, and a rubber-based latex is added to the substrate in an amount of 0.1 to 10%. Means for Solving the Problems A cement-based self-leveling material characterized in that 0.01 to 1% by weight of a cationically modified derivative of a water-soluble natural polysaccharide containing galactomannan as a main component is added to a substrate. And

According to the present invention, during the curing and curing period of the poured self-leveling aqueous composition, the cationically modified derivative of a water-soluble natural polysaccharide containing galactomannan as a main component suppresses the rate of water evaporation from the surface. To prevent the occurrence of cracks. When applied to the floor construction method according to claim 1, the crack prevention effect obtained by the construction method can be enhanced, and the crack prevention effect can be improved even in summer when the moisture evaporation rate is fast or in a drying room. Obtained reliably.

The cationically modified water-soluble natural polysaccharide mainly composed of galactomannan used in the present invention is
Modified guar gum (galactomannan) produced from guar bean endosperm is a cationic modified derivative having a substitution degree of 0.11 to 0.13 obtained by modifying 2,3-epoxypropyltrimethylammonium chloride as a reactant. In the embodiment, the commercial product name “Jaguar-CP
-13 "(made by May Hall, Switzerland) is dissolved in water and added to the self-leveling aqueous composition. This substance is known as a smoothing agent for electrolytic refining such as lead, and a coagulation and sedimentation aid for wood pulp and iron ore slime.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
3 will be described with reference to FIG. 1 and 2, reference numeral 1 denotes a base, 2 denotes a mold, 3 denotes a self-leveling aqueous composition, 4 denotes a heating medium (hot water distribution pipe), and 5 denotes a wire mesh. As the base 1, a concrete or a gravel laid on concrete is used. The self-leveling aqueous composition 3 is obtained by adding water and an antifoaming agent to a self-leveling material based on cement, fly ash and silica sand, and further adding 3% by weight of a cationic chloropyrene emulsion (chloroprene) to the substrate. (Based latex) as a solid content. Heat medium 4
Is laid on the entire surface of the base 1 on which the self-leveling aqueous composition 3 is to be cast, so that the whole of the self-leveling aqueous composition 3 can be uniformly heated.
The heating medium 4 is not limited to the hot water flow pipe, and for example, a heating wire or the like can be applied as long as the self-leveling aqueous composition 3 can be heated to about 55 ° C. The position of the heat medium 4 is determined by the self-leveling aqueous composition 3.
Is not limited to the upper surface of the base 1 as long as it is below the casting surface of the base 1, for example, it may be the center of the self-leveling aqueous composition 3 in the placement thickness direction or inside the base 1. Wire mesh 5
It is installed slightly above the substrate 1 and parallel to the upper surface of the substrate 1.

In the present embodiment, the self-leveling aqueous composition 3 is cast on a portion of the base 1 on which the heat medium 4 is laid, and immediately after this, hot water at 55 ° C. is flowed into the heat medium 4. The poured self-leveling aqueous composition 3 is cured and cured while being heated.

Table 1 shows the self-leveling aqueous composition 3
This shows the compressive strength, bending strength, and the presence or absence of cracks of the cured product of the self-leveling aqueous composition (hereinafter, “cured product”) obtained after curing of the composition. In Table 1, Comparative Example 1 was prepared by applying the self-leveling aqueous composition 3 by the conventional method, and was performed at room temperature (2
Cured and cured at 0 ° C.), Comparative Example 2 was prepared by applying a self-leveling aqueous composition having the same composition except that the cationic chloroprene emulsion was not added, according to a conventional method. (20 ° C.) cured and cured.

[0016]

[Table 1]

According to Table 1, in the cured product of the self-leveling aqueous composition 3 applied by the application method of the present invention, the strength already attained by half or more of the final achieved strength already appeared after 6 hours, and the shrinkage force due to moisture evaporation. It can be understood that no cracks occur at all. It is also found that a curing and curing period of about one day is sufficient. Further, the cured product of the self-leveling aqueous composition 3 has higher compressive strength and bending strength than the cured product of the self-leveling aqueous composition of another composition regardless of the application method. From this, the addition of 3 weight percent of the cationic chloropyrene emulsion,
It can be seen that it greatly contributes to the improvement of the compressive strength and the bending strength.

FIG. 3 shows a self-leveling aqueous composition 3.
The cured body obtained by applying the construction method of the present invention, and the cured body obtained by applying the self-leveling aqueous composition 3 by the conventional method, a conventional general mortar, and a quick-setting mortar, The relationship between curing and curing days and strength is shown. FIG.
According to the method, the cured product obtained by applying the self-leveling aqueous composition 3 by the application method of the present invention has the shortest curing and curing periods, and has a markedly lower compressive strength and bending strength than conventional ones. Improvement is recognized.

Table 2 shows that a self-leveling material based on cement, fly ash and silica sand was mixed with water and a defoamer. Further, a cationic chloroprene emulsion was used in an amount of 3% by weight based on the base material, and galactomannan was mainly used. A self-leveling aqueous composition in which a cationically modified derivative of a water-soluble natural polysaccharide as a component is added in an amount of 0.05% by weight based on the base material is cast on a portion of the base 1 on which the heat medium 4 is laid. Immediately after the casting, 55 ° C. hot water is passed through the heating medium 4 to heat and cure the cured self-leveling aqueous composition 3 while heating and curing the cured product. Indicates presence / absence. In addition, the cationically modified derivative of the water-soluble natural polysaccharide containing galactomannan as a main component is dissolved in water added to the self-leveling material, or a solution previously dissolved in a solvent is added to the self-leveling material. Even in the case of the addition form, the self-leveling aqueous composition 3 is made to have high fluidity by adjusting the amount of the solvent.

[0020]

[Table 2]

According to Table 2, this cured product also has 6
Already after half an hour, the intensity of the final achieved intensity is more than half,
It can be seen that cracking does not occur at all, withstanding the shrinkage due to moisture evaporation. It is also found that a curing and curing period of about one day is sufficient. In addition, the addition of a cationically modified derivative of a water-soluble natural polysaccharide containing galactomannan as a main component suppresses rapid evaporation of water from the surface of the cured product after casting. , The effect of preventing cracking is reliably obtained.

[0022]

As described above, according to the floor construction method of the first aspect, the cast self-leveling aqueous composition is heated by a heat medium to be cured from the ground side or from the inside. It suppresses the occurrence of shrinkage distortion during drying, so a smooth floor surface without cracks can be obtained, and the hardening and curing period can be reduced to about one day, greatly reducing the construction period. It has an excellent effect that it can be done.

According to the cement-based self-leveling material of the second aspect, the cationically modified derivative of a water-soluble natural polysaccharide containing galactomannan as a main component is added to the self-leveling aqueous composition, so that the self-leveling aqueous composition can be used. Since the rapid evaporation of water from the surface of the self-leveling aqueous composition is suppressed, a smooth floor without cracks can be obtained and cracks can be prevented even in an environment where water evaporation is promoted, for example, in summer. The effect is surely obtained. In particular, when the method is applied to the floor construction method according to claim 1, an excellent effect that the effect of preventing cracking can be reliably obtained even when curing and curing are performed in a short period of time in an environment where moisture evaporation is promoted. To play.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a floor construction method of the present invention.

FIG. 2 is a front sectional view of FIG.

FIG. 3 is a view showing the effect of the present invention, wherein the self-leveling aqueous composition of the present embodiment, the conventional self-leveling aqueous composition mortar, mortar, and quick-setting mortar, The relationship between curing time and strength is shown.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 3 Self-leveling aqueous composition 4 Heat medium

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[Procedure amendment]

[Submission date] December 26, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

According to the present invention, the cast self-leveling aqueous composition is heated with a heat medium and cured from the underside or inside, thereby suppressing the occurrence of shrinkage distortion during drying and preventing cracks on the surface. To prevent. The rubber latex, to apply the cationic chloro-flop Ren emulsion or the like.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

Further, the inventors cement, fly ash and silica sand in self-leveling materials based on water and antifoaming agent was added, the more cationic black <br/> b flop Ren emulsion as solids The self-leveling aqueous composition obtained by adding 0.1 to 10% by weight to the base material is excellent in water resistance after curing and adhesion to the underlying concrete, and that compressive strength and bending strength are improved. I found it. The improvement in strength is due to the added cationic chloro
Double bond of carbon in the polymer flop Ren emulsion ties a metal oxide of silicon oxide (SiO) or calcium oxide (CaO) system as an intervening, it is considered to be caused to form a network. Incidentally, with respect to a 0.1 weight percent cationic black <br/> b flop Ren emulsion solids substrate is insufficient in improving the strength, 1
Since the fluidity becomes insufficient at 0% by weight or more, the object of the present invention is achieved at 0.1 to 10% by weight.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

For example, when the self-leveling material is used as mortar for floor heating, conventionally, a heating medium such as a hot water distribution pipe is laid on a base such as concrete, and a self-leveling aqueous composition is cast thereon. In general, the composition is cured by natural curing, but in the construction method of the present invention, the composition is cured by heating from the base side or inside with a heating medium immediately after the self-leveling aqueous composition according to claim 1 is cast. Let it. Cationic chloro-flop Ren emulsion when Da設a self-leveling aqueous composition prepared by adding 10% by weight 0.1 relative to the substrate, the polymer of cationic chloroprene emulsion by heating with the heat medium network By accelerating the formation reaction, surface cracks can be completely prevented. As a result, the hardening time and curing period of the self-leveling aqueous composition become less than 24 hours, which can be greatly reduced as compared with about 7 to 10 days in the related art, and several months in some cases. .

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
3 will be described with reference to FIG. 1 and 2, reference numeral 1 denotes a base, 2 denotes a mold, 3 denotes a self-leveling aqueous composition, 4 denotes a heating medium (hot water distribution pipe), and 5 denotes a wire mesh. As the base 1, a concrete or a gravel laid on concrete is used. Self-leveling aqueous composition 3, cement, fly ash and silica sand was added water and antifoaming agent to the self-leveling materials based, 3% by weight of cationic chloro-flop Ren emulsion against further substrate ( (Chloroprene-based latex) as a solid content. Heat medium 4
Is laid on the entire surface of the base 1 on which the self-leveling aqueous composition 3 is to be cast, so that the whole of the self-leveling aqueous composition 3 can be uniformly heated.
The heating medium 4 is not limited to the hot water flow pipe, and for example, a heating wire or the like can be applied as long as the self-leveling aqueous composition 3 can be heated to about 55 ° C. The position of the heat medium 4 is determined by the self-leveling aqueous composition 3.
Is not limited to the upper surface of the base 1 as long as it is below the casting surface of the base 1, for example, it may be the center of the self-leveling aqueous composition 3 in the placement thickness direction or inside the base 1. Wire mesh 5
It is installed slightly above the substrate 1 and parallel to the upper surface of the substrate 1.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

[0016]

[Table 1]

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

According to Table 1, in the cured product of the self-leveling aqueous composition 3 applied by the application method of the present invention, the strength already attained by half or more of the final achieved strength already appeared after 6 hours, and the shrinkage force due to moisture evaporation. It can be understood that no cracks occur at all. It is also found that a curing and curing period of about one day is sufficient. Further, the cured product of the self-leveling aqueous composition 3 has higher compressive strength and bending strength than the cured product of the self-leveling aqueous composition of another composition regardless of the application method. Therefore, the addition of 3% by weight of cationic chloro-flop Ren emulsion,
It can be seen that it greatly contributes to the improvement of the compressive strength and the bending strength.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction contents]

[0020]

[Table 2]

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C04B 24:38) (72) Inventor Kuniyoshi Takagi 4-3-1-18 Nihonbashi Muromachi, Chuo-ku, Tokyo Inside Sky Aluminum Co., Ltd. (72 ) Inventor Yoichi Ichikawa 1-11-15 Higashi Gotanda, Shinagawa-ku, Tokyo Showa Denko DuPont Co., Ltd. (72) Inventor Toshiki Saito 3-7-16 Mita, Minato-ku, Tokyo

Claims (2)

[Claims] 1. A self-leveling material based on cement, fly ash and silica sand, to which water and an antifoaming agent are added, and that a rubber-based latex is added as a solid content in an amount of 0.1 to 10% by weight based on the base material. The self-leveling aqueous composition (3) is cast on a substrate (1) on which a heat medium (4) is laid, and then the self-leveling aqueous composition is heated from the substrate side or inside by the heat medium. A floor construction method characterized by being cured. 2. A self-leveling material based on cement, fly ash and silica sand, to which water and an antifoaming agent are added. Further, 0.1 to 10% by weight of a rubber-based latex based on the base material and galactomannan are added. A cement-based self-leveling material, wherein a cationically modified derivative of a water-soluble natural polysaccharide as a main component is added in an amount of 0.01 to 1% by weight based on a base material.