JP2010019012A - Construction method for floor structure and floor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor structure capable of forming a backing layer having high horizontal leveling property on an upper face of a non-water absorbing backing floor constituted by existing coated floor material finish or existing flooring material finish and a backing floor where the non-water absorbing backing floor constituted by existing coated floor material finish or existing flooring material finish remains partially in a short period of time and providing a coated floor material finish layer having high strength and high resistance to wear or a flooring material finish layer having satisfactory aesthetic appearance. <P>SOLUTION: This construction method for the floor structural body comprises: a process for providing a backing adjusting material layer on the upper face of the non-water absorbing backing floor by using any one of backing adjusting material selected from a polymer cement composition containing acrylic polymer emulsion (A) and primer containing acrylic polymer emulsion (B), and a process for providing a self-leveling material slurry hardened body layer on an upper face of the backing adjusting material layer by using a self-leveling material. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a floor structure construction method and a floor structure for construction or repair of a floor structure on a non-water-absorbing foundation floor of a building.

  Buildings such as offices and offices are often finished by sticking various finishing materials (upholstered floor materials) such as tiles, natural stone plates, ceramic plates, metal plates or resin sheets to the surface of the concrete floor. When these flooring materials are used as finishing materials for concrete floors, good aesthetics and high durability can be obtained.

  Also, in buildings such as factories and warehouses, various resin-based coating materials and various polymer cement-based coating materials are generally used for finishing concrete floors. When these coating floor materials are used as finishing materials for concrete floors, the effect of improving the wear resistance and chemical resistance of the floor surface can be obtained.

On the other hand, as a method for constructing a foundation layer having a high level level on the upper surface of a concrete floor of a new concrete structure, a floor foundation construction method using a self-leveling material or the like is known. Also, since the concrete floor has water absorption, it prevents moisture in the self-leveling material slurry from penetrating into the concrete floor surface, and further strengthens the adhesion with the hardened body of the self-leveling material slurry. In general, a primer layer for a self-leveling material is provided between the concrete floor upper surface and the self-leveling material slurry cured body. As a primer layer for a self-leveling material, it is common to use a primer mainly composed of an acrylic-styrene copolymer resin or an ethylene vinyl acetate copolymer. The primer layer is provided so as to have an application amount of 60 g / m ² .

  As a construction method of a concrete floor structure, for example, the cited document 1 is obtained by curing at least (E) a concrete floor layer, (D) a mixture of concrete and an ethylene-vinyl acetate copolymer emulsion or higher alcohol. Cured product, or a layer of a cured product obtained by curing an ethylene-vinyl acetate copolymer emulsion or higher alcohol, (C) a cured product layer of an acrylic primer for self-leveling material, and (B) a cement-based self The (B) layer is formed on the (C) layer, the (C) layer is formed on the (D) layer, and the (D) layer is formed on the (E) layer. ) A concrete floor structure of a building which is sequentially laminated on a layer is disclosed.

  In addition, in Patent Document 2, a cationic latex, a hydraulic inorganic powder, and an aggregate are blended into a base when a hydraulic inorganic material-based self-leveling material is poured into the base to which a resin material is adhered. A method for constructing a self-leveling floor is disclosed, in which a self-leveling material is poured after the applied base treatment material is applied and then a resin-based primer is applied.

  Further, Patent Document 3 is a layer structure material to be constructed on a steel plate of a ship, consisting of at least a vibration damping layer and a base layer, the vibration damping layer comprising a composition containing an acrylic resin emulsion, A marine structural material is disclosed in which the base is cement containing synthetic rubber latex.

Patent Document 4 discloses a cement composition comprising cement, a saponified ethylene-vinyl acetate copolymer, water, and alcohol as a cement composition for metal coating.
JP 2005-155130 A Japanese Patent Laid-Open No. 5-148988 JP 2004-249805 A Japanese Patent Laid-Open No. 1-138164

  In renovation of concrete floors of existing buildings that have a floor finish surface layer that has been finished using coated flooring and upholstered flooring, which have been increasing in recent years, existing coated flooring and upholstered floors have been used from the environmental aspect. There is an increasing demand to control construction waste generated when materials are removed. In addition, in response to the aging and decline of construction engineers, the work to remove existing coated flooring and upholstery flooring is reduced, and the concrete floor is ground to roughen rough irregularities. There is an increasing demand for a technique capable of forming a new coated flooring finish having a good flatness and a floor surface with a stretched flooring finish.

  Renovating the concrete floor of an existing building with a floor finish surface layer finished with painted flooring or upholstered flooring, and finishing with flat or upholstered flooring with good flatness and horizontal level When trying to form a floor, it is common practice to remove the existing coated floor and the existing upholstery that were initially constructed, and then polish the concrete floor to smooth out rough irregularities. In addition, a method of forming a base of a finishing material layer newly provided using a self-leveling material is employed.

  When using a self-leveling material, it is usually necessary to form a base layer using a primer for the self-leveling material before applying the self-leveling material in order to obtain good adhesion to the base floor. is there. However, when the primer for the self-leveling material is applied to a material having good water absorption such as concrete, the base floor and the hardened self-leveling material slurry can be firmly bonded by the anchor effect. When a non-water-absorbing base floor such as a wood floor or a flooring material was applied at the same coating amount as that of a concrete floor, it was not possible to obtain a good adhesive strength. Therefore, it has been difficult to obtain a new painted floor structure or a floor structure with a finished floor having good adhesion strength and durability by repairing or refurbishing without removing the existing foundation floor. In addition, even if the existing foundation floor is removed by performing a complicated lifting work, if the existing foundation floor remains partially, there is a risk that a defective adhesion will occur and the finishing material will float or peel off Had.

  Therefore, the present invention provides a non-water-absorbing foundation floor such as an existing coated floor finish (referred to as “existing coated floor finish”) or an existing stretched floor finish (referred to as “existing stretched floor finish”), or an existing painted floor. A high-strength, high-strength base layer is formed in a short period of time on the upper surface of the base floor where the non-water-absorbing base floor such as the finishing of the wood or the existing tension floor is partially left. It is an object of the present invention to provide a method of constructing a floor structure having an abrasion-resistant coated flooring finish layer or a tensioned flooring finish layer having good aesthetics, and a floor structure obtained by the method.

  In the present invention, on the upper surface of a non-water-absorbing base floor, any one base conditioning material selected from a polymer cement composition containing an acrylic polymer emulsion (A) and a primer containing an acrylic polymer emulsion (B) Is a method for constructing a floor structure, which includes a step of providing an undercoat conditioning material layer using, and a step of providing a cured self-leveling material slurry layer using a self-leveling material on the upper surface of the underlayer conditioning material layer.

The preferable aspect of the construction method of the floor structure of this invention is shown below. In the present invention, these embodiments can be appropriately combined.
(1) The non-water-absorbing base floor is provided with at least one non-water-absorbing finish selected from an existing tension floor finish or an existing painted floor finish on at least a part or the entire upper surface of the concrete floor surface layer. This is an existing non-water-absorbing foundation floor having a structure.
(2) The existing flooring finish is at least one selected from tile finishing, natural stone board finishing, ceramic board finishing, metal board finishing, resin board finishing and resin sheet finishing, and the existing coated flooring finish is epoxy. Selected from resin-based flooring, urethane resin-based flooring, methacrylic resin-based flooring, acrylic resin-based flooring, polyester resin-based flooring, vinyl ester-based flooring, and polymer cement-based flooring. One of them.
(3) It further includes a step of providing a finishing layer on the upper surface of the self-leveling material slurry cured body layer.
(4) The finishing layer is a coated floor material finishing layer or a tensioned floor material finishing layer, and the step of providing the coating floor material finishing layer uses a primer for the coating floor material on the upper surface of the self-leveling material slurry cured body layer. A step of providing a primer layer for a coating floor material, and a step of providing a base coat layer for a coating floor material on the upper surface of the primer layer for the coating floor material using a base coat for the coating floor material.
(5) The polymer cement composition includes a hydraulic composition containing Portland cement, fine aggregate, thickener and antifoaming agent, and the acrylic polymer emulsion (A) is made of styrene / alkyl acrylate / methacrylic acid. Including alkyl ester / methacrylic acid copolymer resin and polyoxyethylene / nonylphenyl ether.
(6) The acrylic polymer emulsion (B) contains styrene / acrylic acid alkyl ester / methacrylic acid copolymer resin and polyoxyethylene / nonylphenyl ether.
(7) The self-leveling material is one or more selected from a hydraulic component composed of alumina cement, Portland cement and gypsum, a polyacrylic ester resin system, a styrene butadiene synthetic rubber system and a vinyl acetate berobaacrylic copolymer system. Resin powder of resin.
(8) The self-leveling material further contains at least one selected from inorganic powders, fine aggregates, setting agents, fluidizing agents, thickeners and antifoaming agents.
(9) The Shore hardness of the surface of the self-leveling material slurry cured body layer is 10 or more after 2 hours from the completion of the placement of the self-leveling material slurry.
(10) The Shore hardness of the surface of the cured self-leveling material slurry layer is 50 or more after 6 hours from the completion of the placement of the self-leveling material slurry.

  Moreover, this invention is the repair method of a floor structure which repairs the existing non-water-absorbing foundation floor by the construction method of said floor structure.

  Moreover, this invention is a floor structure obtained by said construction method or repair method.

  According to the present invention, a non-water-absorbing foundation floor such as an existing painted floor finish or an existing tension floor finish, or a non-water-absorbent foundation floor such as an existing paint floor finish or an existing tension floor finish partially remains. It is possible to obtain a floor structure in which the adhesive strength between the upper surface of the underlying floor and the self-leveling material slurry cured body is further increased. In addition, according to the present invention, a non-water-absorbing foundation floor such as an existing painted floor finish or an existing tension floor finish, or a non-water-absorbent foundation floor such as an existing paint floor finish or an existing tension floor finish partially remains. A base layer having a high level level is formed on the upper surface of the base floor in a short period of time, and a high-strength, high-abrasion-resistant finish flooring layer or a tensioned flooring finish layer having a good aesthetic appearance is formed. A floor structure having the same can be obtained.

  As a result of repeated trial and error with respect to the above problems, the present inventors have extended the construction schedule while maintaining sufficient pot life (handling time) to stably apply the slurry of the self-leveling material. The present inventors have found a self-leveling material capable of forming a coated floor base having excellent horizontal level accuracy while having a fast curing property and a quick drying property capable of minimizing the problem.

  In addition, by combining this self-leveling material with a specified base material, it is possible to construct a non-water-absorbing base floor, providing excellent construction efficiency and horizontal level accuracy, and good durability during service. It has been found that a coated floor finished floor structure or a stretched floor finished floor structure can be obtained, and the present invention has been completed. In the construction method of the present invention, further, a floor structure having a good aesthetic appearance is obtained by constructing a finish layer on the upper surface of the self-leveling material slurry cured body layer using a coated floor material or a tension floor material. Can do. The “non-water-absorbing base floor” includes not only the case where the entire base floor is non-water-absorbing but also the case where at least a part of the base floor is non-water-absorbing.

  About the construction method of the floor structure of the present invention, a base layer having a high horizontal level is formed in a short period of time on the upper surface of a non-water-absorbing base floor such as an existing coating floor finish or an existing tension floor finish. An example of an embodiment will be described with reference to the drawings shown in FIGS. 1a to 1d, taking as an example the case of forming a coating floor finish layer.

  FIG. 1 a is a partial cross-sectional view showing a base floor 31 with an existing coated floor finish or an existing tension floor finish. The construction method of the present invention can be used to repair an existing non-water-absorbing foundation floor. As the existing non-water-absorbing foundation floor, for example, an ultra-high-strength concrete structure or a concrete structure finished with a mechanical trowel, the surface is extremely dense. A structure with an existing tension floor finish layer can be given. The existing tension floor finish may include at least one selected from tile finish, natural stone plate finish, ceramic plate finish, metal plate finish, resin plate finish, and resin sheet. In addition, the existing coating floor finishes include epoxy resin coating floor finishing, urethane resin coating floor finishing, methacrylic resin coating floor finishing, acrylic resin coating floor finishing, polyester resin coating floor finishing, and vinyl ester coating flooring. Any one selected from finishing and polymer cement-based coating floor finishing can be mentioned.

  In the present invention, first, as shown in FIG. 1 b, a base adjusting material layer 34 is provided on the upper surface of a non-water-absorbing base floor 31 having unevenness (small unevenness) 32 and a delicate slope 33 using a base adjusting material. The base material used for the construction method of the present invention is a base material made of a polymer cement composition containing an acrylic polymer emulsion (A) or a primer containing an acrylic polymer emulsion (B). The present inventors obtained knowledge that the polymer cement composition has good adhesion to a non-water-absorbing foundation floor, and limited the primer coating amount to an appropriate range, thereby preventing the non-water-absorbing foundation. The knowledge that the adhesion to the floor is good was obtained, and the present invention was achieved.

  In addition, as in the case where the existing base floor has a structure in which at least a part of the upper surface of the concrete floor surface layer is provided with a non-water-absorbing finish such as an existing tension floor finish or an existing coat floor finish, Even if a part of the material is non-water-absorbing and the other part is water-absorbing, the polymer cement composition or primer can be applied with good adhesion to the entire base floor.

  Next, after the base adjustment material layer 34 is dried, a self-leveling material slurry cured body layer 36 is provided on the upper surface of the base adjustment material layer 34 using a self-leveling material. Specifically, first, a self-leveling material slurry 35 is placed as shown in FIG. 1c. Preparation and construction of the self-leveling material slurry is carried into the construction site in the form of a bag, and a predetermined amount is used in the vicinity of the construction site using a mixer such as an on-site mixing / kneading device or hand mixer. A water slurry and a self-leveling material can be mixed to prepare a slurry.

  As shown in FIG. 1d, the self-leveling material slurry 35 shown in FIG. 1c supplied and applied to the concrete floor is cured, and the moisture content on the surface of the cured slurry is reduced to less than 5% (D value is less than 690). Further, a primer layer 37 for a coating floor material is provided on the upper surface of the cured self-leveling material slurry layer 36 formed by curing the self-leveling material slurry 35 using a primer for coating floor material. Furthermore, a base coat for a coating floor material is placed on the upper surface of the primer layer 37 for a coating floor material and cured to provide a base coating layer for a coating floor material 38.

  In the construction method of the present invention, the surface of the self-leveling material slurry cured body layer 36 is roughened by using a polishing apparatus or the like before the primer layer 37 for coating floor material is formed on the upper surface of the self-leveling material slurry cured body layer 36. Treatment or surface polishing treatment is preferable. This is because the adhesion between the surface of the self-leveling material slurry cured body layer 36 and the primer layer 37 for coating floor material and the base coat layer 38 for coating floor material can be further enhanced. When performing the roughening treatment, for example, a commercial electric floor polisher or the like can be suitably used, and it is preferable to use # 50 to # 200 abrasive paper attached to the polisher. When performing the surface polishing treatment, for example, a polishing machine manufactured by LINAX can be suitably used, and the polishing depth is preferably 0.1 to 0.5 mm.

  In the construction method of the present invention, for the purpose of protecting the surface layer of the base coat cured layer 38 and improving the functions such as durability and slip prevention, the top for the coated floor material is formed on the upper surface of the base coat cured body layer 38 for coated floor material. It is preferable to provide the topcoat layer 39 for coating floor materials using a coat.

Note that construction advance method of the present invention, when the construction area is a large area of 200 meters ² or greater, comprises a tank for storing the self-leveling material, as shown in FIG. 4 of JP 2008-57202 It is preferable to use a self-leveling material slurry preparation and construction truck. By using the self-leveling material slurry preparation and construction truck, it is possible to continuously prepare the slurry of the self-leveling material and continuously supply it to the construction site, so that it is more excellent from the viewpoint of construction efficiency and construction quality. A self-leveling material slurry cured body layer can be obtained.

The construction area where the self-leveling material slurry preparation and construction truck can be suitably applied is preferably a site having a construction area of 200 m ² or more, more preferably a site having a construction area of 400 m ² or more, particularly preferably 500 m ² or more. This site has a construction area of When applying a self-leveling material slurry to such a large-area site, the use of the truck makes the construction efficiency very high and significantly shortens the transition period to the next step, coating floor material construction. can do.

  According to the construction method of the floor structure of the present invention, there are various unevennesses and inclinations by combining a predetermined base conditioning material, a predetermined self-leveling material and a predetermined coated floor material or a predetermined upholstery floor material. In order to construct a coated floor material or a tensioned floor material after forming a self-leveling material slurry cured body layer having an excellent horizontal level by applying and curing a self-leveling material slurry on the upper surface of a non-water-absorbing base floor, The finished surface of the coated flooring or the finished surface of the upholstered flooring also has an excellent horizontal level, and good serviceability and aesthetics can be obtained.

  Moreover, the self-leveling material suitable for the construction method of this invention can form the floor surface which is excellent in quick-hardness and quick-drying property, and has the outstanding horizontal level property by containing an appropriate amount of alumina cement. By using such a self-leveling material, it is possible to construct the coating floor foundation very efficiently and stably.

  Further, when repairing a non-water-absorbing existing ground floor having a painted floor material or a tension floor material of an existing building using the construction method of the present invention, it is not necessary to remove the existing ground floor, On the upper surface, a new floor structure using a coated flooring material or a tensioned flooring material can be provided with good adhesion.

  By the construction method of the floor structure of the present invention, the existing non-water-absorbing foundation floor can be efficiently repaired. Moreover, since the floor structure obtained by the above method has characteristics of high strength and high wear resistance, it is possible to obtain excellent durability as a floor structure.

  The floor structure construction method of the present invention uses a self-leveling material with high self-fluidity, and therefore is preferably used for construction of an indoor floor structure that does not require a water gradient.

  Next, the base material, the self-leveling material, the coated floor material and the tension floor material that can be suitably used in the construction method of the present invention will be described.

<Ground adjuster / Part 1>
One of the ground preparation materials suitable for use in the construction method of the present invention is a ground conditioning material comprising a polymer cement composition containing an acrylic polymer emulsion (A). As the base preparation material used in the construction method of the present invention, preferably, a polymer cement composition further containing Portland cement, fine aggregate, thickener and antifoaming agent, and an acrylic polymer emulsion ( A) is a polymer cement composition containing styrene / acrylic acid alkyl ester / methacrylic acid alkyl ester / methacrylic acid copolymer resin and polyoxyethylene / nonylphenyl ether. Hereinafter, a preferred embodiment of a polymer cement composition (hereinafter referred to as “the present polymer cement composition”) that is preferable as a base material to be used in the construction method of the present invention will be specifically described.

  The acrylic polymer emulsion (A) contained in the polymer cement composition is preferably composed of styrene / alkyl acrylate / alkyl methacrylate / methacrylic acid copolymer resin and polyoxyethylene / nonylphenyl ether. The blending amount of styrene / alkyl acrylate / methacrylic acid / methacrylic acid copolymer resin is the resin component of the acrylic polymer emulsion (A) from the viewpoint of improving the adhesion with the layer in contact with the base material layer. As 100% by weight, it is preferably 80 to 98% by weight, more preferably 85 to 96% by weight, and still more preferably 90 to 94% by weight. The other resin component of the acrylic polymer emulsion (A) is preferably polyoxyethylene nonylphenyl ether.

  The hydraulic composition contained in the present polymer cement composition contains Portland cement as a hydraulic component. The hydraulic composition contained in the present polymer cement composition can consist of Portland cement, or can contain blast furnace slag powder as other components, for example inorganic components.

  As Portland cement, Portland cement such as ordinary Portland cement, early-strength Portland cement, ultra-early strong Portland cement, moderately hot Portland cement, low heat Portland cement, white Portland cement, and the like can be used. Moreover, blast furnace cement containing Portland cement, mixed cement such as fly ash cement, silica cement, and the like can be used.

  The hydraulic composition contained in the present polymer cement composition may further contain blast furnace slag powder as an inorganic component. When a hydraulic composition contains blast furnace slag powder, the crack resistance of the hardening body by drying shrinkage can be improved.

  When the hydraulic composition contained in the present polymer cement composition contains blast furnace slag powder, the blending amount is preferably 10 to 350 parts by mass, more preferably 15 to 200 parts by mass with respect to 100 parts by mass of the hydraulic component. More preferably, 20 to 150 parts by mass, particularly preferably 30 to 100 parts by mass are blended. When the blending amount of the blast furnace slag powder is less than 10 parts by mass, the curability may be poor, so it is preferable that the amount is more than 10 parts by mass. Moreover, when there is more compounding quantity of blast furnace slag powder than 350 mass parts, since there exists a possibility of causing the fall of hardening body strength, it is preferable that it is less than 350 mass parts.

As the blast furnace slag powder contained in the present polymer cement composition, those having a brain specific surface area of 3000 cm ² / g or more as defined in JIS A 6206 can be used.

  The hydraulic composition contained in the polymer cement composition can further contain inorganic components such as fly ash and silica powder, and can improve the crack resistance of the cured product due to drying shrinkage.

  In the hydraulic composition contained in the polymer cement composition, the amount of the inorganic component added is preferably 10 to 350 parts by mass, more preferably 30 to 200 parts by mass with respect to 100 parts by mass of the hydraulic component (Portland cement). More preferably, it is 50 to 180 parts by mass, particularly preferably 70 to 150 parts by mass.

  The hydraulic composition contained in the present polymer cement composition may further contain fine aggregate as necessary. When the hydraulic composition does not contain blast furnace slag powder, the fine aggregate is preferably 30 to 500 parts by mass, more preferably 50 to 400 parts by mass, and still more preferably 80 to 300 parts per 100 parts by mass of the hydraulic component. Part by mass, particularly preferably in the range of 100 to 250 parts by mass is preferred. When the hydraulic composition contains blast furnace slag powder, the fine aggregate is preferably 10 to 200 parts by mass, more preferably 20 to 150 parts by mass, and further preferably 25 to 100 parts by mass with respect to 100 parts by mass of the hydraulic component. Parts, particularly preferably in the range of 30 to 90 parts by weight.

  As the fine aggregate, an aggregate having a particle size of 2 mm or less, preferably an aggregate having a particle size of 0.032 to 1.5 mm, more preferably an aggregate having a particle size of 0.075 to 1 mm, particularly preferably 0.1 to 0.1 mm. The main component is an aggregate of 0.85 mm.

  As fine aggregates, sands such as quartz sand, river sand, sea sand, mountain sand and crushed sand can be preferably used. The fine aggregate is preferably silica sand.

  The particle size of the fine aggregate is measured using several sieves having different nominal dimensions as defined in JIS Z 8801.

  As the antifoaming agent, known materials such as synthetic materials such as silicone-based, alcohol-based, and polyether-based materials, mineral oil-based materials, and plant-derived natural materials can be used.

  An antifoaming agent can be added to the polymer cement composition as long as the characteristics of the present invention are not impaired. The addition amount of the antifoaming agent is preferably 0.001 to 2 parts by mass, more preferably 0.005 to 1.5 parts by mass, and more preferably 0.01 to 1 part by mass with respect to 100 parts by mass of the hydraulic component. Parts, particularly 0.02 to 0.5 parts by mass. The addition amount of the antifoaming agent is preferably in the range of 0.001 to 2 parts by mass because a good antifoaming effect is observed.

  A thickener can be added to the polymer cement composition. As the thickener, a thickener containing hydroxyethyl methylcellulose can be suitably used. Other celluloses except hydroxyethylmethylcellulose, modified starches such as starch ether and guar gum, proteins, latex, and water-soluble A polymer system or the like can be used in combination.

  The addition amount of the thickener can be added within a range that does not impair the characteristics of the present invention, and is preferably 0.001 to 2 parts by mass, more preferably 0.005 to 100 parts by mass of the hydraulic composition. It is preferable to contain 1 part by mass, more preferably 0.01 to 0.8 part by mass, particularly 0.03 to 0.6 part by mass. When the addition amount of the thickener is increased, the fluidity may be lowered. Therefore, it is preferably used within the above range.

  The use of a thickener and an antifoaming agent in combination with the present polymer cement composition can prevent the separation of aggregates such as hydraulic components and fine aggregates, suppress the generation of bubbles, It is preferable in order to give a favorable effect to the improvement and improve the properties of the polymer cement cured body.

  The hydraulic component contained in the hydraulic composition of the present polymer cement composition is preferably composed of Portland cement. Moreover, this polymer cement composition can contain the thickener and antifoamer which contain fine aggregates, such as silica sand, hydroxyethyl methylcellulose, as components other than a hydraulic component. The thickener can include hydroxyethyl methylcellulose. In addition, the polymer cement composition may optionally include blast furnace slag powder, and may optionally include a fluidizing agent and a setting modifier.

  The polymer cement composition is a hydraulic composition containing Portland cement and a polymer cement composition containing an acrylic polymer emulsion (A). The acrylic polymer emulsion (A) is made of styrene / alkyl acrylate / methacrylic. It is preferable that an acid alkyl ester / methacrylic acid copolymer resin and polyoxyethylene / nonylphenyl ether are included because of excellent adhesion strength to both the non-water-absorbing base floor and the self-leveling material slurry cured body layer.

  Mix the prescribed hydraulic component, inorganic component, fine aggregate, thickener and antifoaming agent, and blast furnace slag powder, fluidizing agent, setting agent, etc., if necessary. Thus, a premix powder of the present polymer cement composition can be obtained.

  Moreover, in this polymer cement composition, a hydraulic composition and water are added to an acrylic polymer emulsion (A) and mixed and stirred to obtain a polymer cement composition.

  In the present polymer cement composition, the blending ratio of the acrylic polymer emulsion (A) to the hydraulic composition is the total solid content (resin content) of the acrylic polymer emulsion (A) with respect to 100 parts by mass of the hydraulic composition. When the amount of use does not include blast furnace slag, the range of 1 to 20 parts by mass is preferable, the range of 1.5 to 15 parts by mass is more preferable, 2 to 13 parts by mass is more preferable, and 2.5 to 10 parts by mass. Part is particularly preferred. Moreover, when including a blast furnace slag, the range of 2-35 mass parts is preferable, the range of 3-30 mass parts is more preferable, 4-25 mass parts is more preferable, 5-20 mass parts is especially preferable. If the amount is less than the lower limit value (1 or 2 parts by mass), sufficient adhesive strength may not be obtained between the base floor and the cured body of the polymer cement composition. Moreover, since the raise of slurry viscosity will become remarkable when the upper limit (20 or 35 mass parts) is exceeded, and workability may be impaired, and economical efficiency may also be reduced, it is below the upper limit. Is preferred.

  The present polymer cement composition can be applied by a method such as trowel coating, roller coating, brush coating, spraying, casting, pouring, etc., and the foundation can be smoothly adjusted by the good fluidity of the material itself. When the present polymer cement composition does not contain blast furnace slag, it is preferably applied by trowel coating. Moreover, when this polymer cement composition contains blast furnace slag, it is preferable to construct by roller coating.

In the present polymer cement composition, the acrylic polymer emulsion (A), the hydraulic composition, and, if necessary, water are mixed at a constant ratio. Such a polymer cement composition preferably has a pot life of 0.3 to 2 hours in a temperature range of 2 ° C to 40 ° C, more preferably in a temperature range of 5 ° C to 35 ° C. The working time is sufficient to ensure the working time of the coating, and the curing time by drying and hydration is 0.75 hours not only when the coating thickness is 1 mm to 3 mm but also when the coating thickness is 3 mm to 30 mm. It is possible to form a base layer that cures rapidly in ˜9 hours and exhibits good adhesion.
<Preparation material / Part 2>
Another one of the ground preparation materials preferably used in the construction method of the present invention is a ground conditioning material comprising a primer containing an acrylic polymer emulsion (B). The primer for use in the construction method of the present invention is preferably a primer in which the acrylic polymer emulsion (B) contained in the primer contains styrene / acrylic acid alkyl ester / methacrylic acid copolymer resin and polyoxyethylene / nonylphenyl ether. Thus, good adhesive strength can be obtained by applying and applying to a non-water-absorbing foundation floor within an appropriate range. Hereinafter, the preferable aspect of a primer (henceforth "this primer") preferable as a foundation | substrate adjustment material used for the construction method of this invention is demonstrated concretely.

  The acrylic polymer emulsion (B) contained in the primer is preferably composed of styrene / alkyl acrylate / methacrylic acid copolymer resin and polyoxyethylene / nonylphenyl ether. The blending amount of the styrene / alkyl acrylate / methacrylic acid copolymer resin is 100% by weight of the resin component of the acrylic polymer emulsion (B) from the viewpoint of improving the adhesion with the layer in contact with the base material layer. It is preferably 80 to 98% by weight, more preferably 85 to 96% by weight, and still more preferably 90 to 94% by weight. The other resin component of the acrylic polymer emulsion (B) is preferably polyoxyethylene nonylphenyl ether.

The acrylic polymer emulsion (B) contains a resin component and water, and the acrylic polymer emulsion (B) is preferably 100 to 60% by weight, and the resin component is preferably 30 to 60% by weight, and 35 to 55% by weight. It is more preferable that it is 38 to 52% by weight.

When the primer is applied to the upper surface of the non-water-absorbing base floor, the solid content of the resin component of the acrylic polymer emulsion (B) contained in the primer is preferably 10 to 40 g / m ^2. It is preferable to perform the coating operation once in order to stably obtain excellent work efficiency, a shortening effect of the work process, and good adhesive strength.

In addition, in the case where the resin component of the acrylic polymer emulsion (B) contained in this primer is two types of styrene / alkyl acrylate / methacrylic acid copolymer resin and polyoxyethylene / nonylphenyl ether, non-water absorption The total mass (P) of the two types of resin components applied to the upper surface of the conductive base floor is preferably 10 to 40 g / m ² , more preferably 12 to 35 g / m ² , more preferably 15 to 30 g / m ² , It is particularly preferable that the primer is applied in a single coating operation so as to be 18 to 25 g / m ² , so that excellent work efficiency, a shortening effect of the work process, and good adhesive strength can be stably achieved. Preferred for obtaining.

When the application amount of this primer exceeds the range of 10 to 40 g / m ² , particularly when applying and constructing an amount in the range of 45 to 60 g / m ² , which is preferable for a general concrete floor base. When the adhesive strength of the floor structure is evaluated, the base conditioning material layer itself made of a primer between the non-water-absorbing base floor and the self-leveling material slurry cured body can be broken, and high strength can be stably obtained. Since it is difficult, it is preferable that it is below the upper limit of the range of 10-40 g / m < ² >. In addition, if the coating amount is less than the lower limit of the range of 10 to 40 g / m ² , it is difficult to form a good adhesion state between the non-water-absorbing base floor and the primer. / m as the lower limit or more resin component amount in the range of ^2, it is preferable to apply and construction of this primer on the base floor surface of the non-water absorptive.

  The primer preferably has a pot life of 0.3 to 2 hours in a temperature range of 2 ° C. to 40 ° C., more preferably in a temperature range of 5 ° C. to 35 ° C., which is sufficient to ensure practical working time. It has a long pot life and can be quickly cured in a drying time of 0.75 hours to 9 hours to form a base layer exhibiting good adhesiveness.

<Self-leveling material>
The self-leveling material used in the construction method of the present invention contains alumina cement as an essential component of the hydraulic component. Furthermore, the self-leveling material (hereinafter referred to as “the present self-leveling material”) preferably used in the construction method of the present invention contains a hydraulic component made of alumina cement, Portland cement and gypsum.

  As the alumina cement contained as the hydraulic component of the self-leveling material, several types of mineral compositions having different mineral compositions are known and commercially available, but the main component is monocalcium aluminate (CA). It can be used regardless of its type.

  Portland cement included as the hydraulic component of the self-leveling material is selected from Portland cements such as ordinary Portland cement, early-strength Portland cement, ultra-high strength Portland cement, moderately hot Portland cement, low heat Portland cement, and white Portland cement. Can be used. Further, it can be appropriately selected from mixed cements such as blast furnace cement, fly ash cement and silica cement.

  As for the gypsum contained as the hydraulic component of the present self-leveling material, each gypsum such as anhydrous gypsum, hemihydrate gypsum, and dihydrate gypsum can be used as one type or a mixture of two or more types. Gypsum functions as a component that retains dimensional stability after the mortar obtained by kneading the self-flowing hydraulic composition and water is cured.

  As the hydraulic component of the present self-leveling material, it is preferable to use a hydraulic component made of alumina cement, Portland cement and gypsum. The hydraulic component is preferably composed of 20 to 80 parts by mass of alumina cement, 5 to 70 parts by mass of Portland cement, and 5 to 45 parts by mass of gypsum (a total of alumina cement, Portland cement and gypsum is 100 parts by mass). A composition, more preferably 25-70 parts by mass of alumina cement, 10-60 parts by mass of Portland cement and 10-40 parts by mass of gypsum (the total of alumina cement, Portland cement and gypsum is 100 parts by mass), More preferably, the alumina cement is 30 to 60 parts by mass, the Portland cement is 20 to 50 parts by mass, and the gypsum is 15 to 35 parts by mass (the total of the alumina cement, Portland cement and gypsum is 100 parts by mass), particularly preferably the alumina cement. 40-50 parts by weight, Portland Semé 30 to 40 parts by mass and gypsum 20 to 30 parts by mass (the total of alumina cement, Portland cement and gypsum is 100 parts by mass). This is preferable because it is easy to obtain a cured product with low expansion and little volume change during curing.

  This self-leveling material has the effect of significantly reducing the air permeability of the cured body by preventing dry cracking of the cured body of the self-leveling material slurry, and further, the tensile strength of the cured body is further increased. Preference is given to using powder.

  In the present self-leveling material, it is preferable to supply the constituent components by premixing them because the blending ratio of the constituent components can be strictly controlled. Therefore, the resin powder to be used is also preferably a powdered re-emulsifying resin powder.

  The resin powder contained in the self-leveling material has an effect of improving resistance to the occurrence of cracks and an effect of densifying the hardened body structure in the process in which the shrinkage stress generated by drying leads to the occurrence of cracks. The resin powder is not particularly limited in its production method such as a resin pulverization method, and those produced by a known production method can be used. As the resin powder, an anti-blocking agent is mainly used. What has adhered to the surface of the resin powder can be used. As the resin powder, it is preferable to use a re-emulsification type resin powder obtained by removing the solvent and drying the aqueous polymer dispersion by a method such as spraying or freeze drying.

  As the resin powder, one or more resins selected from a polyacrylate resin system, a styrene butadiene synthetic rubber system, and a vinyl acetate vinyl acryl copolymer system can be used. A re-emulsification type resin powder and an acrylate-methacrylate copolymer type re-emulsification resin powder can be preferably used.

  As the particle size of the resin powder, those having a residue on the 315 μm sieve of 3% or less, a residue on the 300 μm sieve of 3% or less, and particularly a residue of 300% on the sieve of 2% or less can be preferably used.

  The resin powder is preferably 0.5 to 20 parts by mass, more preferably 0.8 to 15 parts by mass, still more preferably 2.0 to 8.0 parts by mass, particularly preferably 100 parts by mass of the hydraulic component. Can be blended with 0.8 to 10 parts by mass. When the ratio of the resin powder is larger than the range of 4.0 to 7.0 parts by mass, the viscosity of the slurry obtained by adding water increases and the workability decreases, and the compressive strength of the cured body tends to decrease. Since it exists, it is preferable that it is the range of 0.5-20 mass parts. Moreover, when it is smaller than the range of 0.5 to 20 parts by mass, the effect of improving the tensile strength of the cured body and the effect of reducing air permeability tend to be small, so the lower limit of the range of 0.5 to 20 parts by mass The above is preferable.

  The self-leveling material used in the construction method of the present invention includes a hydraulic component and a resin powder made of alumina cement, Portland cement and gypsum, and the resin powder includes a polyacrylate resin system, a styrene butadiene synthetic rubber system and a vinyl acetate base. It is preferably one or more resins selected from overacrylic copolymer systems. Furthermore, it is preferable to contain at least one selected from inorganic powder, fine aggregate, setting modifier, fluidizing agent, thickener and antifoaming agent. The self-leveling material used in the construction method of the present invention includes a hydraulic component and resin powder made of alumina cement, Portland cement and gypsum, and further includes inorganic powder, fine aggregate, setting agent, fluidizing agent, thickener and It is preferable that an antifoamer is included.

  The self-leveling material preferably contains at least one inorganic component selected from blast furnace slag fine powder, fly ash, silica fume, calcium carbonate fine powder and dolomite fine powder, and particularly contains blast furnace slag fine powder. Thus, the crack resistance of the cured body due to drying shrinkage can be enhanced. In the self-leveling material, the added amount of the inorganic component is preferably 10 to 200 parts by mass, more preferably 20 to 150 parts by mass, still more preferably 30 to 130 parts by mass, particularly preferably 100 parts by mass of the hydraulic component. It is preferable to set it as 40-100 mass parts.

In the present self-leveling material, the amount of blast furnace slag fine powder added is preferably 10 to 200 parts by weight, more preferably 20 to 150 parts by weight, and even more preferably 30 to 130 parts by weight with respect to 100 parts by weight of the hydraulic component. Especially preferably, it is preferable to set it as 40-100 mass parts. If the addition amount of the blast furnace slag fine powder is too small, the drying shrinkage of the cured body increases, and if it is too large, the initial strength may be lowered. As the blast furnace slag fine powder, those having a brain specific surface area of 3000 cm ² / g or more as defined in JIS A 6206 can be used.

  The self-leveling material can further contain fine aggregate as necessary. The fine aggregate is preferably in the range of 30 to 500 parts by mass, more preferably 40 to 400 parts by mass, still more preferably 60 to 300 parts by mass, and particularly preferably 80 to 150 parts by mass with respect to 100 parts by mass of the hydraulic component. Is preferred. As the fine aggregate, an aggregate having a particle size of 2 mm or less, preferably an aggregate having a particle size of 0.075 to 1.5 mm, more preferably an aggregate having a particle size of 0.1 to 1 mm, particularly preferably 0.15 to 0.15. It is preferable that the main component is an aggregate of 0.6 mm. The particle size of the fine aggregate is measured using several sieves having different nominal dimensions as defined in JIS Z 8801.

  Fine aggregates include silica sand, river sand, sea sand, mountain sand and crushed sand, alumina clinker, silica powder, clay mineral, waste FCC catalyst and inorganic materials such as limestone, urethane crushed, EVA foam and foaming resin It can be used by selecting from a resin pulverized product. In particular, as the fine aggregate, those selected from sands such as quartz sand, river sand, sea sand, mountain sand and crushed sand, waste FCC catalyst, quartz powder, alumina clinker and the like can be preferably used.

  The self-leveling material preferably uses a fluidizing agent (a water reducing agent such as a high performance water reducing agent) in order to ensure suitable fluidity while suppressing material separation. Since the expression strength of alumina cement, which is a hydraulic component, is greatly affected by the water / cement ratio, it is particularly preferable to reduce the water / hydraulic component ratio by using a fluidizing agent having a water reducing effect.

  As a fluidizing agent, a fluidizing agent selected from commercially available products such as formaldehyde condensate of melamine sulfonic acid, casein, calcium caseinate, lignin, polyether, etc. and polyether polycarboxylic acid, which also has a water reducing effect, It can be used regardless of the kind, and it is particularly preferable to use a commercially available fluidizing agent selected from polyether-based and polyether polycarboxylic acids.

  The fluidizing agent can be appropriately added in a range that does not impair the characteristics, depending on the hydraulic component used, and is preferably 0.01 to 2.0 parts by mass, more preferably 100 parts by mass of the hydraulic component. Can be blended in an amount of 0.02 to 1.0 parts by mass, particularly preferably 0.05 to 0.5 parts by mass. If the addition amount is less than the lower limit of the range of 0.01 to 2.0 parts by mass, a suitable effect (excellent fluidity and high cured body strength) may not be exhibited. The lower limit of the part range is preferred. In addition, when the addition amount is larger than the upper limit of the range of 0.01 to 2.0 parts by mass, an effect commensurate with the addition amount may not be expected. It is conceivable that the consistency increases and the amount of kneading water for obtaining the required fluidity increases to deteriorate the strength properties. Therefore, it is preferable that the addition amount of a fluidizing agent is below the upper limit of the range of 0.01-2.0 mass parts.

  Depending on the hydraulic component and other constituents contained in the present self-leveling material used for the present self-leveling material, it is preferable to add a setting regulator as long as the properties are not impaired. By appropriately selecting the components, addition amount and mixing ratio of the setting retarder and the setting accelerator, the pot life, fast curing and quick drying properties of the self-leveling material can be adjusted. This is because it becomes very easy to use.

  As the setting retarder, a known setting retarder can be used. Examples of setting retarders include sodium sulfate, sodium bicarbonate, sodium tartrate, sodium malate, sodium citrate, and organic acids such as sodium gluconate, such as sodium salts such as inorganic and organic sodium salts, and oxycarboxyl One of the components selected from acids and the like can be used alone or in combination of two or more components.

  Oxycarboxylic acids include oxycarboxylic acids and their salts. Examples of the oxycarboxylic acid include aliphatic oxyacids such as citric acid, gluconic acid, tartaric acid, glycolic acid, lactic acid, hydroacrylic acid, α-oxybutyric acid, glyceric acid, tartronic acid, malic acid, salicylic acid, and m-oxybenzoic acid. Examples thereof include aromatic oxyacids such as acid, p-oxybenzoic acid, gallic acid, mandelic acid and tropic acid. Examples of oxycarboxylic acid salts include alkali metal salts of oxycarboxylic acids (specifically, sodium salts, potassium salts, etc.), alkaline earth metal salts (specifically, calcium salts, barium salts, magnesium salts, etc.), etc. Can be mentioned.

  In particular, sodium bicarbonate and sodium L-tartrate are preferable from the standpoints of setting delay effect, availability, and cost.

  When one or more kinds of setting retarders are used, the addition amount of each setting retarder is preferably 0.01 to 1.5 parts by weight, more preferably 100 parts by weight of the hydraulic component. Is preferably 0.1 to 1.2 parts by weight, more preferably 0.2 to 1.0 parts by weight, and particularly preferably 0.25 to 0.8 parts by weight. It is preferable because the pot life (handling time) can be secured.

  As a setting accelerator, the well-known component which accelerates | stimulates can be used, for example, the lithium salt which has a setting promotion effect can be used suitably. Examples of lithium salts include inorganic lithium salts such as lithium carbonate, lithium chloride, lithium sulfate, lithium nitrate, and lithium hydroxide; organic acid organics such as lithium acetate, lithium tartrate, lithium oxalate, lithium malate, and lithium citrate Lithium salts such as lithium salts can be used. In particular, lithium carbonate is preferable from the viewpoints of the setting acceleration effect, availability, and cost.

  As the setting accelerator, it is preferable to use a particle size that does not hinder the properties, and the particle size is preferably 50 μm or less. Particularly when a lithium salt is used, the particle diameter of the lithium salt is preferably 50 μm or less, more preferably 30 μm or less, and particularly preferably 10 μm or less. When the particle diameter is larger than the range of 50 μm, the solubility of the lithium salt decreases. Since it is conspicuous as a large number of spots and may impair the beauty, it is preferably in the range of 50 μm or less.

  The setting accelerator is preferably 0.01 to 1 part by weight, more preferably 0.01 to 0.5 part by weight, and still more preferably 0.02 to 0.3 part, with respect to 100 parts by weight of the hydraulic component. It is preferable to use in the range of part by mass, particularly preferably in the range of 0.02 to 0.2 part by mass, because it is possible to obtain suitable quick-hardness and quick-drying after securing the pot life of the self-leveling material.

  The self-leveling material can contain a thickener. Thickeners include hydroxyethyl methylcellulose, and other cellulose-based excluding hydroxyethylmethylcellulose, modified starches such as starch ether and guar gum, protein-based, latex-based, and water-soluble polymer-based thickeners are used in combination. Can be used.

  The addition amount of the thickener can be added within a range not impairing the characteristics of the present invention, and is preferably 0.001 to 2 parts by mass, more preferably 0.005 to 100 parts by mass of the hydraulic component. It is preferable to include 1.5 parts by mass, more preferably 0.01 to 1 part by mass, particularly 0.05 to 0.8 parts by mass. When the addition amount of the thickener is increased, the mortar (slurry) viscosity is increased and the fluidity may be lowered.

  In this self-leveling material, the combined use of a thickener and an antifoaming agent has a favorable effect on suppressing the separation of aggregates such as hydraulic components and fine aggregates, suppressing the generation of bubbles, and improving the surface of the cured body. It is preferable for improving the properties of the cured product of the present self-leveling material.

  The defoaming agent contained in the self-leveling material is a combination of one or more known materials such as silicone-based, alcohol-based, polyether-based synthetic materials or mineral oil-based, plant-derived natural materials. Can be used.

  The addition amount of the antifoaming agent can be added within a range that does not impair the properties of the present self-leveling material. When one type of antifoaming agent is used, it is preferably 0.001 with respect to 100 parts by mass of the hydraulic component. -3.0 mass parts, More preferably, it is 0.005-2.5 mass parts, More preferably, it is 0.01-2.0 mass parts, It is preferable to contain 0.02-1.7 mass parts especially. The addition amount of the antifoaming agent is preferably in the range of 0.001 to 3.0 parts by mass because a suitable antifoaming effect is observed.

  In addition, when two or more kinds of antifoaming agents are used in combination, the addition amount of the antifoaming agent is preferably 0.001 to 2 parts by mass with respect to 100 parts by mass of the hydraulic component. More preferably, it is 0.005 to 1.5 parts by mass, more preferably 0.01 to 1.3 parts by mass, and particularly preferably 0.02 to 1.1 parts by mass. The addition amount of the antifoaming agent is preferably in the range of 0.001 to 2 parts by mass because a suitable antifoaming effect is observed.

  In the case of constituting this self-leveling material, particularly suitable component constitution is a hydraulic component composed of alumina cement, Portland cement and gypsum, fine aggregate such as resin powder, inorganic component and silica sand, fluidizing agent, It contains a thickener, an antifoaming agent, and a setting modifier.

  Mix the prescribed hydraulic components, resin powder, inorganic components, fine aggregate, fluidizing agent, thickener, antifoaming agent, and coagulation modifier with a mixer to obtain a premix powder of this self-leveling material. be able to.

  The pre-mixed powder of the self-leveling material can be mixed and stirred with a predetermined amount of water to produce a slurry (mortar) having a self-leveling property in the form of a slurry. The self-leveling material can be cured by curing the slurry. Can be obtained.

  This self-leveling material can be mixed and stirred with water to produce a slurry (mortar). By adjusting the amount of water added, the fluidity of the slurry (mortar), pot life, material separability, The strength of the slurry (mortar) cured body can be adjusted.

  The slurry of the present self-leveling material has a mass ratio (W / C) of the present self-leveling material (C) and water (W) of preferably 0.16 to 0.28, more preferably 0.18 to 0. .26, more preferably in the range of 0.19 to 0.25, particularly preferably in the range of 0.20 to 0.24.

  This self-leveling material has a flow value of a slurry (mortar) having a self-leveling property (self-fluidity) prepared by mixing with water, preferably 190 to 270 mm, more preferably 200 to 260 mm, particularly preferably 210 to 200 mm. It is preferable that the thickness is adjusted to 255 mm for the reason that it is easy to obtain a hardened body surface that is easy to construct and highly smooth.

  The thickness of this self-leveling material slurry depends on the unevenness of the concrete floor slab surface and the slope of the slab surface, and can be set appropriately for each construction site. Based on the partial upper surface, the construction thickness is preferably in the range of 2 mm to 70 mm, more preferably in the range of the construction thickness of 2 mm to 50 mm, more preferably in the range of the construction thickness of 2 mm to 40 mm, particularly preferably the construction thickness of 2 mm to Pouring is preferably performed within a range of 30 mm.

  When the slurry of this self-leveling material is applied thinly to a height of 2 mm to 5 mm with reference to the top surface of the most convex part of the floor slab surface, the slurry is poured using a spike roller, a dragonfly, a trowel, etc. while pouring the slurry. It is preferable to perform an operation of evenly spreading to form the slurry at a high level in a thin layer on the entire floor slab. When the slurry of this self-leveling material is applied thickly to a height of 5 mm to 70 mm with reference to the top surface of the most convex part of the floor slab surface, the slurry is spread evenly using a dragonfly while pouring the slurry. It is preferable to perform an auxiliary operation in order to form the slurry at a high level in a thick layer over the entire floor slab.

  This self-leveling material slurry has a sufficient pot life (handling time) to ensure good workability. The pot life of the self-leveling material slurry is preferably 40 minutes from the slurry preparation, more preferably 50 minutes, and particularly preferably 60 minutes.

  This self-leveling material slurry begins to cure between 1 hour and 3 hours after the completion of construction, depending on the temperature and humidity conditions at the construction site, and the surface hardness of the cured body increases with the progress of curing. In addition, the moisture content on the surface of the cured body is reduced. The Shore hardness of the surface of the self-leveling material slurry cured body layer is preferably 10 or more after 2 hours from the completion of the placement of the self-leveling material slurry. Further, the Shore hardness of the surface of the self-leveling material slurry cured body layer is preferably 50 or more after 6 hours, more preferably 50 or more after 4 hours, more preferably 50 after 3.5 hours from the placement (construction) of the slurry. As mentioned above, it is 50 or more especially after 3 hours, and after completion | finish of slurry construction, construction of a self-leveling material slurry is completed when hardening progresses rapidly.

  In addition, the water content of the surface of the cured slurry of the present self-leveling material is the time required to reach less than 5% (D value is less than 690), which is a water content suitable for the application of the coating floor material (from the placement of the slurry). Is preferably 12 hours to 24 hours, more preferably 12 hours to 22 hours, more preferably 12 hours to 20 hours, and particularly preferably 12 hours to 18 hours. By using this self-leveling material excellent in quick-curing and quick-drying used in the present invention, it is possible to quickly obtain a good cured state and a surface-dried state, and shift to the construction process of the coating floor material which is the next process Will be possible the next day.

  When this self-leveling material is used, the expansion of the length change rate of the self-leveling material slurry cured body layer is preferably 0 to 0.08%, more preferably 0 to 0.06%, and particularly preferably 0 to 0. 0.05% of the range, and the shrinkage of the length change rate is preferably -0.08 to 0%, more preferably -0.06 to 0%, and particularly preferably -0.05 to 0%. In addition, the self-leveling material having the above-mentioned expansion or contraction characteristics can prevent cracking of the cured body itself, and further has a high adhesive force between the base adjustment material layer serving as the base and the coating floor material applied to the upper layer. It is preferable because it can be retained. When the range of the length change rate is out of the above range, cracks may occur due to the curing shrinkage of the cured body of the self-leveling material slurry.

<Coating floor material>
In the construction method of the present invention, a coating floor finish layer can be provided on the upper surface of the self-leveling material slurry cured body layer. The coating floor material finishing layer is generally composed of a primer layer for coating floor material, a base coat layer for coating floor material, and a top coat layer for coating floor material. Also, depending on the purpose and application, it is composed of a primer layer for a painted floor and a base coat layer for a painted floor, and after further providing a primer layer for a painted floor, it is used for a base coat layer for a painted floor and a coated floor. A plurality of top coat layers are provided.

  In the construction method of the present invention, the kind of the flooring material used for providing the flooring material finish layer is appropriately selected from organic type flooring materials or inorganic type flooring materials according to the required properties. Can do.

  The primer layer for a coating floor material used in the construction method of the present invention is used for improving the adhesion of the coating floor material to the foundation, preventing the suction to the foundation, and preventing pinholes in the coating floor material. In addition, for the formation of a primer layer for a coating floor material, an organic coating floor primer, an inorganic coating floor primer, or the like can be used.

  The primer for organic coating floor material used to provide the primer layer for coating floor material is solvent type epoxy resin type, solventless type epoxy resin type, water type epoxy resin type, mixture of water type epoxy resin type and cement, solvent Urethane resin, solvent-type urethane resin and cement, solvent-free urethane resin, moisture-curing urethane resin, moisture-curing urethane resin and cement, methacrylic resin, solvent-based acrylic resin and An aqueous acrylic resin system or the like can be used. Moreover, the primer for coating floor materials containing fillers, such as an organic pigment, an inorganic pigment, a talc, a calcium carbonate, and powdery silica, can be used according to a use.

  As the primer for the inorganic coating floor material used in the construction method of the present invention, an aqueous ethylene vinyl acetate resin system, an aqueous acrylic resin system, a solvent epoxy resin system, a solvent acrylic resin system, or the like can be used.

  In the construction of the primer for the coating floor material used in the construction method of the present invention, a brush or a roller can be appropriately selected and used in accordance with the construction manual of each coating floor material manufacturer.

  The base coat layer for a coating floor material used in the present invention is used for imparting main functions such as durability, mechanical strength and elasticity of the coating floor material. In addition, for the formation of the base coat layer for a coating floor material, an organic coating floor coating base coat, an inorganic coating floor coating base coat, or the like can be used. Specifically, as a material for providing a base coat layer for a coating floor material (base coat for a coating floor material), an epoxy resin coating floor material, a urethane resin coating floor material, a methacrylic resin coating floor material, an acrylic resin coating It is preferable to use any one selected from flooring materials, polyester resin-based coating materials, vinyl ester-based coating materials, and polymer cement-based coating materials. This is because by applying these base coats for coating floor materials together with the above-mentioned base conditioner and self-leveling material to provide the base coats for coating floor materials, it is possible to obtain a good finish.

  More specifically, as a base coat for an organic coating floor material used in the construction method of the present invention to provide a base coating layer for a coating floor material, a solvent type epoxy resin type, a solventless type epoxy resin type, and an aqueous type epoxy resin , Solvent-based urethane resin-based, solvent-free urethane resin-based, moisture-curing urethane resin-based, methacrylic resin-based, solvent-based acrylic resin-based, water-based acrylic resin-based, polyester resin-based and vinyl ester resin-based floors Materials can be used. Depending on the application, organic base coating materials containing fillers such as organic pigments, inorganic pigments, talc, calcium carbonate and powdered silica, and fine aggregates can be used as the base coat for the coating floor material.

  In order to provide a base coat layer for a coating floor material, as a base coat for an inorganic coating floor material used in the construction method of the present invention, more specifically, a Portland cement, a white Portland cement, a super fast cement, a special fast curing cement, and Consists of a cementitious material composed of one or more alumina cements and a resin composed of one or more synthetic resin emulsions such as ethylene vinyl acetate, styrene butadiene rubber, chloroprene rubber, acrylic and epoxy. Can be used. Moreover, the inorganic type coating floor material containing fillers, such as an organic pigment, an inorganic pigment, a talc, a calcium carbonate, powdered silica, can be used as a base coat for coating floor materials by a use.

  In the construction of the base coat for a coating floor material used in the construction method of the present invention, a trowel, a roller, or a brush can be appropriately selected and used in accordance with the construction manual of each coating floor material manufacturer.

  The top coat layer for a coating floor material used in the present invention is used for the purpose of providing protection and various functions of the base coat layer such as weather resistance, stain resistance, anti-slip property and matte finish.

  As top coats for organic or inorganic coating floor materials used in the construction method of the present invention, solvent type epoxy resin type, solventless type epoxy resin type, aqueous type epoxy resin type, solvent type urethane resin type, solvent type urethane 1 type or 2 or more types selected from resin, moisture curable urethane resin, methacrylic resin, solvent acrylic resin, aqueous acrylic resin, polyester resin, vinyl ester resin, etc. One layer or two or more top coat layers can be applied using these materials.

  In the construction of the top coat for a coating floor material used in the construction method of the present invention, a trowel, a roller, a brush or the like can be appropriately selected and used in accordance with the construction manual of each coating floor material manufacturer.

<Upholstered floor finish layer>
The tension floor finishing layer in the construction method of the present invention is appropriately selected from a tension floor finishing selected from tile finishing, natural stone board finishing, ceramic board finishing, metal board finishing, resin board finishing and resin sheet finishing. It can be provided, and a finish with a good aesthetic appearance can be obtained by constructing together with the above-described base material and self-leveling material.

  Hereinafter, the present invention will be described in detail based on examples. However, the present invention is not limited by the following examples.

<Experimental Examples 1-4 and Reference Examples 1 and 2: Evaluation of Self-Leveling Material>
(Characteristic evaluation method)
(1) Fluidity evaluation of self-leveling material slurry:
・ Measurement method of flow value:
Measured according to JASS 15M-103. A plastic pipe (internal volume 100 ml) with an inner diameter of 50 mm and a height of 51 mm is placed on a 5 mm thick glass sheet, and after mixing the kneaded self-leveling material slurry up to the upper end of the resin pipe, the pipe is vertically oriented. Pull up. After the spread of the slurry stops, the diameters in two directions at right angles are measured, and the average value is taken as the flow value to evaluate the fluidity of the slurry.

-SL value measurement method:
The SL value is measured using the SL measuring device shown in FIG. 2, and a barrier plate is provided on a rail having a width of 30 mm × a height of 30 mm × a length of 750 mm and a length of 150 mm from the tip, and a predetermined amount of slurry immediately after kneading is filled. To mold. Immediately after molding, the weir plate is pulled up, and after the slurry flow is stopped, the distance from the gauge point (weir plate installation part) to the shortest part of the slurry flow is measured, and the value (SL value) is set to L0. The time for 200 mm is measured, and the measurement time is defined as SL flow velocity (L0) (second / 200 mm).

Similarly, after 20 or 30 minutes after molding, the weir plate is pulled up, and after the flow of the slurry is stopped, the distance from the gauge point (the installation portion of the weir plate) to the shortest portion of the slurry flow is measured, and the value (SL value) ) Is set to L20 or L30, the time for flowing 200 mm from the weir plate is measured, and the measurement time is set to SL flow velocity (L20, L30) (second / 200 mm), respectively.
・ Evaluation conditions are 20 ° C and 65% humidity.

(2) Evaluation of length change of self-leveling material slurry cured body:
-The length change rate is measured using the apparatus shown in FIG. The length change rate was measured by casting the slurry immediately after kneading to the height of the mold inside the mold, starting the measurement of the length change immediately after casting, and measuring the interval every 5 minutes. Measure until the day. The measurement conditions are 20 ° C. and RH 65%.

  The rate of change in length when the self-leveling material slurry is cured is the amount of change in the distance between the SUS disk 75b and the end of the displacement sensor 74 (end on the SUS disk 75b side) shown in FIG. ) Is divided by the distance (480 mm) between the SUS disk 75a and the SUS disk 75c.

  4, 5, and 6 are diagrams schematically illustrating an example of a change in the length of the sample in the process of curing the self-leveling material slurry.

  In FIG. 4, the measurement sample has an age of 0 days (point a) as a base length, and expands with hardening, expands most at point b, and then gradually contracts to a length of 28 days (point c). In Equations (1) to (3), B is the length of the sample at point a, C is the length of the sample at point b, and A is the length of the sample at point c.

  In FIG. 5, the measurement sample has an age of 0 days (point a) as a base length, and gradually contracts without being expanded with hardening, resulting in a length of material age of 28 days (point c). In Equations (1) to (3), B and C are the length of the sample at point a, and A is the length of the sample at point c.

  In FIG. 6, the measurement sample has an age of 0 days (point a) as a base length, and gradually expands without shrinking along with hardening, resulting in a length of material age of 28 days (point c). In equations (1) to (3), B is the length of the sample at point a, and A and C are the lengths of the sample at point c.

  Measurement method of length change rate: Measured using the apparatus shown in FIG. 3, and the length change rate is calculated according to the following formula (1). The measurement sample is filled with a self-leveling material slurry, and immediately after placement, the age is 0 days. The measurement conditions are 20 ° C. and RH 65%. The length change rate (−) means contraction, and (+) means expansion.

  Measurement method of expansion of length change rate: Using the apparatus shown in FIG. 3, measurement is performed using a measurement sample prepared by the measurement method of length change rate. The expansion of the rate of change in length is the length (C) of the sample when the sample is most expanded, and is calculated according to Equation (2).

  Measurement method of contraction of length change rate: Using the apparatus shown in FIG. 3, measurement is performed using a measurement sample prepared by the measurement method of length change rate. The contraction of the rate of change in length is calculated according to Equation (3), with the length when the sample is most expanded as the base length.

(3) Evaluation of surface properties of cured body of self-leveling material slurry:
-Shore hardness measurement method: At a predetermined elapsed time after pouring the self-leveling material slurry, the hardened surface is pressed vertically to any 3 to 5 locations using a spring type hardness meter type D (manufactured by Ueshima Seisakusho). The average value of the readings of the spring type hardness tester type D gauge at that time is regarded as the Shore hardness of the time, and the surface hardness is evaluated.

  ・ Scratch strength measurement method: After a self-leveling material slurry is poured, the cured surface is subjected to arbitrary 3 to 5 using a scratch tester (Japanese Architectural Institute of Japan, Japan Painted Floor Industry Association certified product). Scratch a length of about 10 cm along the ruler at a speed of 2 cm / second. The scratch width at a load of 1.0 kg is measured using a crack scale and a loupe, and the surface hardness is evaluated as the scratch strength at that time.

-Moisture content on the surface of the cured body The moisture content (D value) on the cured surface is measured using a concrete mortar moisture meter (manufactured by Kett Kagaku Kenkyusha Co., Ltd.) after a predetermined amount of time has elapsed since pouring of the leveling material slurry . Moisture content of less than 5% when measured value D value (HI-500) is less than 690 based on "Measurement method and grade of various qualities of concrete floor surface layer part" of Japan Floor Construction Technology Research Council It is determined that

-Hardened surface properties:
The surface of the hardened slurry was cured by pouring the self-leveling material slurry into a 13 cm x 19 cm resin mold at a thickness of 10 mm, and visually checking for pulverization and fine irregularities at 24 hours of age. It was evaluated by observing. Evaluation is as follows.
Evaluation conditions are performed in an environment of a temperature of 20 ° C. and a humidity of 65%.
○: None, ×: Present

(4) Evaluation of compressive strength (N / mm ² ) and bending strength (N / mm ² ) of the cured self-leveling material slurry:
・ Molded mortar in a 4 × 4 × 16 cm form shown in JIS R 5201, cured in air at a temperature of 20 ° C. and a humidity of 65% for 24 hours, demolded, and further in the air for a predetermined period (7th, 28th) Additional curing is performed to obtain a molded body. The molded body is measured according to the method described in JIS R 5201.

(5) Evaluation of adhesive strength:
・ Measurement method of adhesive strength:
Measured in accordance with NNK-005: 2000 (Japan Paint Floor Industry Association) coating strength test method. A primer layer for a painted floor material is provided on a cured layer of a self-leveling material slurry 14 days after the self-leveling material slurry is poured, and a base coat for a painted floor material is applied thereon to form a base coat layer for a painted floor material. Provide. A square steel jig having an attachment surface of 40 mm x 40 mm is adhered to a base coat layer for a coating floor material after 7 days of age with an adhesive at five locations. After the adhesive has hardened, cut along the periphery of the steel jig with a diamond cutter until reaching the hardened layer of the self-leveling material slurry, attach the steel jig to the Kenken-type adhesion tester, and gradually pull the steel jig. Apply a load and pressurize until it breaks. The maximum load until breaking is the maximum tensile load, and the average strength of the five locations is the bond strength with the coating floor.
The bond strength with the coating floor material is calculated according to Equation (4).

(6) Evaluation of dynamic load resistance:
・ Measuring method of caster test:
A primer layer for a coated flooring material is provided on a cured layer of a self-leveling material slurry 14 days after the self-leveling material slurry is poured, and a cured material layer is formed by applying a coating flooring material thereon. After a curing period until the day, the amount of dents (dynamic load resistance) is measured according to the test method of EN13892-5 (2003). The test apparatus has an operation device that operates a mounting table on which a test body is placed in a right angle direction and a parallel direction, and the mounting table and the rotating shaft of the caster are positioned at right angles to each other and move horizontally. The test conditions were as follows. One steel caster with a load of 2000 ± 10 N was used, and the stroke of the stage on which the test specimen was placed was 390 ± 2 mm stroke width in one direction and 7 ± 0.4 rpm. The direction is 1.72 ± 0.1 rpm with a 260 ± 2 mm stroke width. The process of reciprocating a predetermined area on the specimen is defined as one time, and the operation is repeated 10,000 times. In the measurement, after the operation is finished, four lines are drawn at equal intervals in the perpendicular direction and parallel direction on the surface of the test specimen, and the dent amount at the intersection (16 points) of each line is measured, and the average dent amount is obtained.

  (Materials used): The following materials were used.

  1) Primer for self-leveling material: U Primer G manufactured by Ube Industries, Ltd.

2) Self-leveling material: A self-leveling material in which the following raw materials were mixed at the blending ratio shown in Table 1 was used.
Alumina cement: Fondge, manufactured by Kerneos, Blaine specific surface area of 3100 cm ² / g.
Portland cement: Hayashi Cement, Ube Mitsubishi Cement Co., Blaine specific surface area 4500 cm ² / g.
Gypsum: Type II natural anhydrous gypsum, manufactured by Kokusai Corporation, Blaine specific surface area 3460 cm ² / g.
-Fine aggregate: Silica sand: No. 6 silica sand.
-Inorganic component: Blast furnace slag fine powder, rebirth, manufactured by Chiba Rebirth, Blaine specific surface area 4400 cm ² / g.
Resin powder: vinyl acetate / versaic acid vinyl ester / acrylic acid ester copolymer, manufactured by Nippon Synthetic Chemical Co., Ltd., LDM2071P.
-Setting retarder: Sodium bicarbonate, manufactured by Tosoh Corporation.
-Setting retarder: L-sodium tartrate, manufactured by Fuso Chemical Industries.
-Setting accelerator: Lithium carbonate, manufactured by Honjo Chemical Co., Ltd.
-Fluidizer: Polycarboxylic acid fluidizer, manufactured by Kao Corporation.
-Thickener: Hydroxyethyl methylcellulose-based thickener, Marporose MX-30000, manufactured by Matsumoto Yushi Co., Ltd.
Antifoaming agent a: a polyether antifoaming agent, manufactured by San Nopco.
-Antifoaming agent b: Polyether type antifoaming agent, made by ADEKA.

3) Primer / primer a for coating floor material: Epoxy resin, Infix EF, manufactured by Fujimaru Chemical Co., Ltd.

4) Base coat / base coat a for coating floor material: Epoxy resin type, Oncrete 73R, manufactured by Fujimaru Chemical Co., Ltd.

5) Top coat / top coat for coating floor material: Epoxy resin type, Oncrete # 58, manufactured by Fujimaru Chemical Co., Ltd.

(Preparation of slurry for self-leveling material)
Under conditions of room temperature 20 ° C. and relative humidity 65%, the self-leveling material and water prepared at the blending ratio shown in Table 1 were used, and in Experimental Example 1 and Experimental Example 2, water 22 was added to 100 parts by mass of the self-leveling material. Each of them is blended at a ratio of parts by mass. For Reference Example 1, blended at a ratio of 26 parts by mass of water with respect to 100 parts by mass of the self-leveling material, kneaded for 3 minutes using a chemistor with a rotation speed of 650 rpm, and self-leveling. A material slurry was prepared.

  Preparation of an epoxy resin-based flooring material manufactured by Fujimaru Chemical Co., Ltd. was performed by the following method.

(Preparation of primer for coating floor material)
Under conditions of room temperature of 20 ° C. and relative humidity of 65%, blended at a ratio of 50 parts by mass of B agent to 100 parts by mass of A agent of the epoxy resin primer for coating floor material, and using a chemistor with a rotation speed of 650 rpm. The mixture was kneaded for 3 minutes to prepare an epoxy resin primer for a coating floor material.

(Preparation of base coat for coating floor material)
Under conditions of room temperature of 20 ° C. and relative humidity of 65%, blended at a ratio of 25 parts by mass of curing agent B and 125 parts by mass of No. 7 silica sand with respect to 100 parts by mass of base A of the epoxy resin base coat for coating floor, An epoxy resin base coat for a coating floor material was prepared by kneading for 3 minutes using a 650 rpm chemistor.

(Preparation of top coat for coating floor material)
A chemistr at a rotation speed of 650 rpm under the conditions of room temperature of 20 ° C. and relative humidity of 65% in a ratio of 12.5 parts by mass of the curing agent B to 100 parts by mass of the base material A of the epoxy resin-based topcoat for coating floor materials. The mixture was kneaded for 3 minutes to prepare an epoxy resin top coat for a coating floor material.

[Experimental Examples 1-2, Reference Example 1]
A self-leveling material slurry was prepared using a self-leveling material containing the components shown in Table 1. Table 2 shows the measurement results of the fluidity (flow value, SL value) of the slurry.

Under conditions of room temperature of 20 ° C. and relative humidity of 65%, a 3 × solution of a primer for self-leveling material (stock solution 90 g / m ² , water 180 g) on a concrete plate of 300 mm × 300 mm × 60 mm specified for a concrete plate for pavement JIS A 5304 / M ² ) and dried. After the primer film formation, the self-leveling material slurry was poured and cured to a working thickness of 10 mm to obtain a self-leveling material slurry cured body layer. Table 3 shows the results of evaluating the surface hardness (Shore hardness), scratch strength, surface moisture content and surface properties of the cured slurry.

  In addition, a self-leveling material slurry of the above three types is packed in a 4 × 4 × 16 cm mold shown in JIS R 5201, and a specimen for measuring the rate of change in length, compressive strength and bending strength. Got. Table 3 shows the results of evaluating the rate of change in length, compressive strength, and bending strength of the cured slurry.

[Experimental Examples 3-4, Reference Example 2]
After applying a primer for self-leveling material to a JIS A 5304 pavement concrete plate and drying it to form a primer layer, the self-leveling material slurry was poured and cured to a working thickness of 10 mm, and JASS 15 M-103 According to the rule of the surface adhesion test specimen described in (Quality Standards for Self-Leveling Material), the material was cured for 14 days to obtain a cured self-leveling material slurry layer. Next, various coating floor materials were respectively applied on the hardened layer of the self-leveling material slurry. After the coating floor material was cured, the coating floor material was cured for 7 days to obtain specimens of the coated floor finished concrete structure.

  After applying a primer for self-leveling material to JIS A 5304 pavement concrete flat plate and drying it, the primer layer was formed, and then the self-leveling material slurry was poured and cured to a working thickness of 10 mm, and the material was cured for 14 days. Thus, a self-leveling material slurry cured body layer was obtained. Next, a coating floor material was applied on the hardened layer of the self-leveling material slurry. After the coating floor material was cured, the coating floor material was cured for 7 days to obtain a specimen of a coated floor finished concrete structure for caster test.

Construction of an epoxy resin-based coating floor material manufactured by Fujimaru Chemical Co., Ltd. was performed by the following method.
Apply and dry the epoxy resin primer for coating floor using a roller to 150g / m ² and form a primer layer, then trowel the epoxy resin base coat for coating floor to 1kg / m ^2. The base coat layer was provided by applying and applying. After the base coat for the coating floor material was cured, the epoxy resin top coat for the coating floor material was applied using a trowel so as to be 1.5 kg / m ² to provide a top coat layer.

  Table 4 shows the results of the adhesion test and caster test (evaluation of dynamic load resistance) of the specimens prepared using the self-leveling material and the coating floor material.

  (1) The self-leveling material of Reference Example 1 is excellent in the fluidity of the slurry and exhibits good rapid hardening because it contains 44% by mass of alumina cement in 100% by mass of the hydraulic component. A Shore hardness of 66 was obtained. In addition, when the Shore hardness is 45 or more, an operator can ride on the cured body layer.

  (2) The self-leveling material of Experimental Example 1 and Experimental Example 2 shows fluidity almost equal to that of Reference Example 1 in both the flow value and the SL value in the flow characteristics of the slurry. Good characteristics are obtained. Further, the Shore hardness of the cured body surface shows a Shore hardness of 70 or more in 3 hours from the construction, and the scratch strength of the cured body surface also exceeds the strength of Reference Example 1. Moreover, about the moisture content of the hardened | cured body surface, the moisture content less than 5% said to be able to construct | coat a coating floor material satisfactorily can be satisfied in 24 hours after slurry construction, and the extremely excellent quick-hardness and quick-drying property are shown. . The shrinkage rate of the cured slurry is also smaller than that of Reference Example 1, and the finished surface of the cured product has good properties equivalent to those of the Reference Example. Furthermore, the strength characteristic exceeding the reference example 1 is acquired also about the compressive strength and bending strength of a slurry hardening body.

  (3) In the adhesion strength test result regarding the specimen in which the flooring material was applied to the upper surface of the self-leveling material slurry cured body, the adhesion strength exceeding Reference Example 2 was obtained in both Experimental Example 3 and Experimental Example 4. Further, in the results of the caster test (evaluation of dynamic load resistance), in Experimental Example 3 and Experimental Example 4, a value significantly lower than the dent amount in Reference Example 2 was obtained.

  (4) The self-leveling material of Experimental Example 2 in which the amount of resin powder added is larger than that of Experimental Example 1 shows excellent characteristics in bending strength (Table 3) and adhesive strength (Table 4 and Experimental Example 4). ing. On the contrary, the self-leveling material of Experimental Example 1 in which the amount of resin powder added is smaller than that of Experimental Example 2 is superior in compressive strength (Table 3) and dynamic load resistance (Table 4, caster test / Experimental Example 3). The characteristics are shown.

<Examples 1-4>
On various base floors, floor structures were made using various base conditioners and self-leveling materials. The following materials were used for the polymer cement composition containing the acrylic polymer emulsion (A) and the primer containing the acrylic polymer emulsion (B) used as the base preparation.

(Use material of polymer cement composition containing acrylic polymer emulsion (A))
Acrylic polymer emulsion (A): Cationic and acrylic polymer emulsion, resin component (styrene / alkyl acrylate / alkyl methacrylate / methacrylic acid copolymer resin = 92 mass%, polyoxyethylene / nonylphenyl ether = 8 mass%) = 17.5 mass parts, water = 82.5 mass parts.
Portland cement (early strong cement, manufactured by Ube Mitsubishi Cement Co., Ltd., Blaine specific surface area 4500 cm ² / g).
-Fine aggregate: No. 7 quartz sand, manufactured by Ashiya Company.
Inorganic component: Blast furnace slag (Reverment, manufactured by Chiba Riverment Co., Ltd., Blaine specific surface area 4400 cm ² / g).
-Thickener: Hydroxyethyl methylcellulose-based thickener, Marporose MX-30000, manufactured by Matsumoto Yushi Co., Ltd.
Antifoaming agent: Polyethylene glycol antifoaming agent (manufactured by San Nopco).

(Primer containing acrylic polymer emulsion (B))
Nonionic / acrylic polymer emulsion resin component (styrene / alkyl acrylate / methacrylic acid copolymer resin = 93 mass%, polyoxyethylene / nonylphenyl ether = 7 mass%) = 45 mass parts, water = 55 mass parts .

(Procedure for preparing polymer cement composition)
The polymer cement composition used as the base material was prepared by the following procedure using the hydraulic composition and acrylic polymer emulsion (A) in the blending ratio shown in Table 5 as Experimental Example 5.

  A hydraulic composition prepared by mixing emulsion Portland cement, fine aggregate, inorganic components, thickener and antifoaming agent using a rocking mixer and acrylic polymer emulsion (A) are mixed for 3 minutes. Thus, a polymer cement composition was prepared.

  As the self-leveling material, the self-leveling material shown in Experimental Example 1 of Table 1 having the most excellent flow properties, fast curing properties, strength characteristics and dynamic load resistance (caster test) was used. The method for preparing the self-leveling material slurry was performed in the same manner as in Experimental Example 1.

  As the coating floor finishing material, the primer, base coat and top coat for the coating floor material were prepared in the same manner as in the experimental example, using the epoxy resin-based coating floor material used in the experimental example.

  An epoxy resin-based coated flooring material used in the experimental examples was applied to a 300 mm × 300 mm × 60 mm concrete flat plate defined as a JIS A 5304 pavement concrete flat plate, and a concrete flat plate for painted floor finishing was prepared.

  Under conditions of room temperature of 20 ° C. and relative humidity of 65%, a concrete plate of 300 mm × 300 mm × 60 mm defined in the concrete plate for pavement JIS A 5304 and a concrete plate for pavement finish pavement prepared in advance are displayed. An undercoat conditioning material comprising a polymer cement composition containing the acrylic polymer emulsion (A) shown in 5 was applied to a thickness of 1 mm and dried.

Similarly, the primer containing the acrylic polymer emulsion (B) was uniformly applied to the two types of concrete flat plates so as to be 22.5 g / m ^{2 in} terms of resin solid content in the primer and dried. .

  After the primer containing the polymer cement composition and the acrylic polymer emulsion (B) is dried, the self-leveling material slurry shown in Experimental Example 1 is poured and cured to a working thickness of 10 mm, and JASS 15 M-103 (self In accordance with the provisions of the surface adhesion test specimens described in "Quality Standards for Leveling Material", a specimen having a self-leveling material slurry cured body layer on the surface layer obtained by curing for 14 days is obtained. It was.

  A coated floor finish concrete structure is constructed by applying a coating floor material on a test body having a hardened self-leveling material slurry layer as a surface layer, and curing the coating floor material for 7 days. A specimen was obtained.

  Table 6 shows the results of adhesion tests on the specimens having the self-leveling material slurry cured body layer on the surface layer and the specimens having the coated floor finish layer applied on the top surface of the self-leveling material slurry cured body layer.

1) In the case of Example 1 in which the polymer cement composition containing the acrylic polymer emulsion (A) (Experimental Example 5) was used as the base preparation material and the painted floor was not finished, the adhesive strength exceeded 3 N / mm ² Even in the case of Example 3 where the painted floor was finished, a good adhesive strength exceeding ² N / mm ² was obtained.

2) In the case of Example 2 in which the primer containing the acrylic polymer emulsion (B) was used as the base preparation material and the painted floor was not finished, the adhesive strength exceeding 3.5 N / mm ² higher than that of Example 1 In the case of Example 4 where the painted floor finish was performed, excellent adhesive strength further exceeding the adhesive strength of Examples 1 to 3 was obtained. The reason why excellent adhesive strength was obtained when the primer containing the acrylic polymer emulsion (B) was used was that the primer coating amount was suitable for forming an excellent adhesion state with a non-water-absorbent floor substrate. This is probably due to the fact that

It is an example of the fragmentary sectional view of the floor structure which constructed the self-leveling material on the concrete floor and constructed the coating floor material. It is a schematic diagram which shows the outline which evaluates the self-leveling property of a hydraulic slurry using a SL measuring device. It is a schematic diagram of the apparatus which measures the length change of the process in which a self-leveling material hardens | cures. It is a schematic diagram which shows an example of the length change at the time of hardening of a self-leveling material. It is a schematic diagram which shows an example of the length change at the time of hardening of another self-leveling material. It is a schematic diagram which shows an example of the length change at the time of hardening of another self-leveling material.

Explanation of symbols

30: Concrete slab 31: Ground floor 32: Small unevenness 33: (Subtle) slope 34: Ground conditioning material layer 35: Self-leveling material slurry 36: Self-leveling material slurry hardened body layer 37: Primer layer for coating floor material 38: Base coat layer for coated floor material 39: Top coat layer for coated floor material 40: Surface of coated floor 71: Length change measuring device 72: Formwork 73: Buffer material 74: Eddy current displacement sensor 75: Disk made of SUS (75a, 75b, 75c)
76: SUS bar (76a, 76b)
77: Fluororesin sheet

Claims (13)

On the upper surface of the non-water-absorbing base floor, the base using any one base preparation material selected from a polymer cement composition containing the acrylic polymer emulsion (A) and a primer containing the acrylic polymer emulsion (B) Providing an adjustment material layer;
And a step of providing a self-leveling material slurry cured body layer using a self-leveling material on the upper surface of the ground adjustment material layer.   The non-water-absorbing foundation floor has a structure in which at least one non-water-absorbing finish selected from an existing tension floor finish or an existing coated floor finish is provided on at least a part or the entire upper surface of the concrete floor surface layer. The method for constructing a floor structure according to claim 1, which is an existing non-water-absorbing foundation floor. The existing upholstery flooring finish is at least one selected from tile finishing, natural stone board finishing, ceramic board finishing, metal board finishing, resin board finishing, and resin sheet finishing,
Existing coating floor finish is epoxy resin coating floor, urethane resin coating floor, methacrylic resin coating floor, acrylic resin coating floor, polyester resin coating floor, vinyl ester coating floor and polymer. The construction method of a floor structure according to claim 2, wherein the construction method is any one selected from cement-based coating floor materials.   The construction method of the floor structure of any one of Claims 1-3 which further includes the process of providing a finishing layer on the upper surface of a self-leveling material slurry hardening body layer. The finishing layer is a coated flooring finishing layer or a tension flooring finishing layer,
The process of providing a coating floor finish layer
A step of providing a primer layer for a coating floor material using a primer for a coating floor material on the upper surface of the self-leveling material slurry cured body layer;
The construction method of the floor structure of any one of Claims 1-4 including the process of providing the basecoat layer for coating floor materials using the basecoat for coating floor materials on the upper surface of the primer layer for coating floor materials. The polymer cement composition comprises a hydraulic composition comprising Portland cement, fine aggregate, thickener and antifoam agent;
The floor according to any one of claims 1 to 5, wherein the acrylic polymer emulsion (A) comprises styrene / alkyl acrylate / alkyl methacrylate / methacrylic acid copolymer resin and polyoxyethylene / nonylphenyl ether. Construction method of the structure.   The construction method of a floor structure according to any one of claims 1 to 5, wherein the acrylic polymer emulsion (B) contains styrene / alkyl acrylate / methacrylic acid copolymer resin and polyoxyethylene / nonylphenyl ether. . Self-leveling material
Hydraulic components consisting of alumina cement, Portland cement and gypsum;
The floor structure according to any one of claims 1 to 7, comprising a resin powder of one or more resins selected from a polyacrylic ester resin system, a styrene butadiene synthetic rubber system, and a vinyl acetate berobaacryl copolymer system. Body construction method.   The self-leveling material further comprises at least one selected from inorganic powders, fine aggregates, setting regulators, fluidizing agents, thickeners and antifoaming agents. Construction method of floor structure.   The construction of the floor structure according to any one of claims 1 to 9, wherein the Shore hardness of the surface of the cured self-leveling material slurry is 10 or more after 2 hours from the completion of the placement of the self-leveling material slurry. Method.   The construction of a floor structure according to any one of claims 1 to 10, wherein the Shore hardness of the surface of the cured self-leveling material slurry is 50 or more after 6 hours from the completion of the placement of the self-leveling material slurry. Method.   A floor structure refurbishing method in which an existing non-water-absorbing foundation floor is refurbished by the floor structure constructing method according to claim 1.   The floor structure obtained by the construction method of any one of Claims 1-11, or the repair method of Claim 12.

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