JP2009068277A - Concrete floor finishing method and finishing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the swelling of a floor finishing layer (a floor material) using a painted floor or a sheet on a concrete floor where many fine cracks and cavities such as small holes exist due to insufficient pressing work with a trowel. <P>SOLUTION: To the surface of the concrete floor 1, mixed liquid consisting of permeable reactive curing agent using silicate as a main component and inorganic fine powder having grain sizes of about 0.1-10 μm is applied. A surface treatment layer 2 which is strongly joined to the concrete floor 1 and hard, dense and free of water permeability and moisture permeability is formed on the surface of the concrete floor 1. Then, the floor finishing layer 4 using the painted floor 3a or the sheet 3b is formed on the surface treatment layer 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a measure for preventing swelling of a flooring material (floor finishing layer made of a coated floor or a sheet) directly applied to a concrete floor.

  The cause of the swelling of the floor finish layer (floor material) due to the painted floor or sheet is not clear at present, but a major factor is the moisture contained in the concrete. It is thought that this alkaline water dissolves flooring ingredients and flooring adhesive ingredients, and the osmotic pressure generated by attracting moisture due to the semi-permeability of concrete causes the floor finish layer (flooring) to swell. ing. It has been found that the generation of this osmotic pressure is greatly influenced by the water-cement ratio of concrete, and it has been reported that the osmotic pressure increases as the water-cement ratio increases. Also, in the examination of failure cases due to blistering, even when the moisture content of the ground concrete is not so large and the soil between the soils is also dry, the floor finish layer bulges due to the coated floor and sheets etc., and a small amount of moisture It has been confirmed that a bulge failure can occur if there is.

Therefore, conventionally, methods (1) to (3) have been adopted as measures for preventing the swelling of the floor finish layer (floor material) by a coated floor or a sheet, but it is difficult to solve either method. There is a problem, and the fact is that the occurrence of failure cases due to swelling has not been eliminated at all.
(1) Increase the adhesive strength between the concrete floor 1 and the floor finish layer (floor material) 4 (see FIG. 3). (2) A water permeable / air permeable layer 6 is formed between the concrete floor 1 and the floor finish layer (floor material) 4 and the pressure due to the evaporation of moisture is released to the atmosphere by the decylinder 7 or the like (see FIG. 4). .
(3) The floor finish layer (floor material) 4 itself has air permeability (see FIG. 5).

  In the method (1), the flooring component and the component of the flooring adhesive may be dissolved by the alkaline moisture contained in the concrete. In the method (2), securing the thickness of the water permeable / air permeable layer 6 and the installation interval of the decylinder 7 are problematic. In the method (3), it is necessary to form the floor finish layer 4 thinly. It is difficult to ensure the durability of the floor finish layer 4.

  In Patent Document 1, a hydrophilic epoxy resin mixture, cement and water, and an epoxy resin cement mixture containing fine aggregates as necessary are applied to the surface of the concrete floor and firmly bonded to the concrete floor. There has been proposed a method in which a ground treatment layer having a three-dimensional network structure having good water resistance and adhesion to a coating material is formed, and a floor finishing layer is formed on the ground treatment layer.

  This is considered to be one of the methods (1) in principle, but even if the adhesion to the coating material is improved by making the base treatment layer a three-dimensional network structure, the three-dimensional network structure There is a possibility that alkaline moisture in the concrete that has permeated the ground treatment layer may dissolve the adhesive component of the coating floor.

  In Patent Document 2, a surface treatment layer is formed by applying a floor conditioning material including polyol, water, an isocyanate compound, hydraulic cement, and an aggregate and filler that are blended as necessary to the surface of the concrete floor. A technique has been proposed in which a floor finish layer is formed by overlaying a reinforced resin layer made of a thermosetting resin and a fiber reinforcing material and a topcoat layer on the ground treatment layer.

This is because, in principle, the adhesion between the base concrete and the base treatment layer is enhanced so that the pushing-up stress due to the evaporation of moisture can be contained even when the water content of the base concrete is high. It is considered one of the methods. However, as described in Patent Document 2, this method is a construction condition that there is no crack on the surface of the concrete floor, but a concrete floor having no voids such as cracks and pores is formed. It is very difficult.

Japanese Patent Laid-Open No. 7-187859 JP 2004-183388 A

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is also in a concrete floor or the like that is insufficiently pressed by a trowel having many voids such as fine cracks and pores. The purpose of the present invention is to prevent the swelling of the floor finish layer (floor material) due to the coated floor or sheet.

  The technical means taken by the present invention in order to achieve the above object are as follows. In other words, the concrete floor finishing method according to the first aspect of the present invention is a method in which an osmotic reaction hardening agent mainly composed of silicate and an inorganic system having a particle size of about 0.1 μm to about 10 μm are formed on the surface of the concrete floor. A mixed liquid with fine powder is applied to form a base treatment layer, and then a floor finishing layer such as a coated floor or a sheet is formed on the base treatment layer.

  The concrete floor finishing structure according to claim 2 is a concrete floor surface comprising an osmotic reaction hardener mainly composed of silicate and an inorganic fine powder having a particle size of about 0.1 μm to about 10 μm. A ground treatment layer formed by applying a mixed solution is provided, and a floor finishing layer made of a coated floor or a sheet is formed on the ground treatment layer.

  According to the first and second aspects of the invention, on the surface of the concrete floor, there is an osmotic reaction curing agent mainly composed of silicate and an inorganic fine powder having a particle size of about 0.1 μm to about 10 μm. Since the mixed solution is applied, even if there are many voids such as fine cracks and pores on the concrete floor surface, the inorganic fine powder is filled in the voids and at the same time the penetration type reaction hardening agent is deep. Will penetrate.

  The silicate, which is the main component of the osmotic reactive curing agent, reacts with the free lime in the concrete to make the moisture in the concrete neutral, and at the same time forms a hard product. As a result, a non-water-permeable and moisture-permeable base treatment layer that is strongly bonded to the concrete floor is formed.

  Therefore, it is possible to prevent moisture from being collected at the interface with the floor finish layer (floor material) such as coated floors and sheets, and dissolution of flooring components and flooring adhesive components due to alkaline moisture. Even in concrete floors that are insufficiently pressed by a trowel having many voids such as holes, it is possible to prevent swelling of the floor finish layer (floor material) due to coated floors and sheets.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1A to 1C show an example of a finishing method and a finishing structure of a concrete floor according to the present invention. (A) of FIG. 1 shows the concrete floor 1 before the ground treatment which the concrete intensity | strength which can be walked at least expressed by the curing after concrete placement. In the illustrated embodiment, the concrete floor 1 is assumed to be a concrete floor in which many voids such as fine cracks and pores exist, such as a concrete floor that is insufficiently pressed by a trowel. However, a mirror finish with a mechanical iron may be used.

  FIG. 1B shows a state where the ground processing is performed, and FIG. 1C shows a state where finishing is completed. In the surface treatment step, the surface of the concrete floor 1 is mixed with a penetration type reaction hardening agent (aqueous solution) mainly composed of silicate and an inorganic fine powder having a particle size of about 0.1 μm to about 10 μm. The liquid is applied to form a base treatment layer 2 that is hard, dense, and strongly bonded to the concrete floor 1 and has no water permeability and moisture permeability.

  That is, when a mixed liquid of a permeable reactive curing agent mainly composed of silicate and an inorganic fine powder having a particle size of about 0.1 μm to about 10 μm is applied to the surface of the concrete floor 1, A large number of voids (cracks, pores, traces of aggregates, etc.) present on the surface are filled with the inorganic fine powder, and at the same time, the osmotic reactive curing agent penetrates deeply. And the silicate which is the main component of the penetration type reaction hardening agent reacts with the free lime in the concrete, the moisture in the concrete becomes neutral, and at the same time, a hard product is formed and hardened on the surface of the concrete floor 1. The base treatment layer 2 which is dense and strongly bonded to the concrete floor 1 and has no water permeability and moisture permeability is formed.

  In this case, the smaller the particle size, the better the fineness of the inorganic fine powder, but the inorganic fine powder having a particle size of 0.1 μm or less is difficult to produce. Since the filling property to the voids is not exhibited, the particle size of the inorganic fine powder needs to be in the range of about 0.1 μm to about 10 μm.

  As the osmotic reaction curing agent mainly composed of silicate, for example, CeraCure, silicate hardener USA, etc. of ABC Shokai Co., Ltd. is preferably used. As the inorganic fine powder, silica fume, silica sand powder and the like are used alone or in combination. Silica fume is most preferable because it has an average particle size of 0.1 μm.

  The ratio of the osmotic reaction curing agent mainly composed of silicate and the inorganic fine powder mixed therein is 100% by weight of the silicate solution. The inorganic fine powder (silica fume alone and a mixture of silica sand) ) Can be applied in the range of 1 to 50 parts by weight, but it is necessary to appropriately change the mixing ratio of the inorganic fine powder and the mixing ratio into the silicate solution depending on the finish of the concrete surface and workability during application. There is. If the concrete finish is a general level, the blending ratio is preferably 2 to 10 parts by weight.

  In the finishing step, as shown in FIG. 1C, a paint for a painted floor is directly applied on the base treatment layer 2 to form a floor finish layer (floor material) 4 by the painted floor 3a. Form.

  According to said structure, it can prevent that a water | moisture content collects in the interface with the floor finishing layer (floor material) 4 by the coating floor 3a, or the component of the coating floor 3a melt | dissolves by an alkaline water | moisture content. Even in a concrete floor that is insufficiently pressed by a trowel having a large number of voids, it is possible to prevent the floor finishing layer (floor material) 4 from swelling due to the coated floor 3a.

  FIG. 2 shows another embodiment of the present invention, which is characterized in that a sheet 3b is bonded onto the base treatment layer 2 to form a floor finishing layer (floor material) 4 by the sheet 3b. 5 is an adhesive.

According to this configuration, it is possible to prevent moisture from being collected at the interface between the sheet 3b and the floor finish layer (floor material) 4, and dissolution of the components of the sheet 3b and the adhesive 5 for the sheet 3b due to alkaline moisture. Even in a concrete floor that is insufficiently pressed by a trowel having many voids such as fine cracks and fine pores, it is possible to prevent the floor finish layer (floor material) 4 from swelling due to the sheet 3b. Other configurations and operations are the same as those in the embodiment of FIG.

It is a vertical side view which shows one Embodiment of this invention. It is a vertical side view which shows other embodiment of this invention. It is a vertical side view which shows a prior art example. It is a vertical side view which shows a prior art example. It is a vertical side view which shows a prior art example.

Explanation of symbols

1 Concrete floor 2 Ground treatment layer 3a Painted floor 3b Sheet 4 Floor finish layer (floor material)
5 Adhesive

Claims (2)

  On the surface of the concrete floor, a mixed solution of a permeable reactive curing agent mainly composed of silicate and an inorganic fine powder having a particle size of about 0.1 μm to about 10 μm was applied to form a base treatment layer. Then, a finishing method for a concrete floor, comprising forming a floor finishing layer by a coated floor or a sheet on the ground treatment layer.   A ground treatment layer formed by applying a mixed liquid of a permeable reactive curing agent mainly composed of silicate and an inorganic fine powder having a particle size of about 0.1 μm to about 10 μm to the surface of a concrete floor A finishing structure for a concrete floor, wherein a floor finishing layer made of a coated floor or a sheet is formed on the ground treatment layer.

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