JP2006097235A - Finishing sub-floor and construction method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a finishing sub-floor which can be inexpensively constructed on a floor slab of a concrete-based material such as reinforced concrete and autoclaved lightweight concrete, and a construction method for the finishing sub-floor. <P>SOLUTION: In the finishing sub-floor, a gypsum material is infilled and hardened between the floor slab and a face material for a finishing bed, installed on the top surface of the floor slab. The construction method for the finishing sub-floor is characterized as follows: after the face material for the finishing bed is installed on the top surface of the floor slab, a screw long enough to pass through the face material is inserted from the front side of the face material; the gypsum material is infilled into a void part, formed between the floor slab and the face material, from at least one opening provided on the front side of the face material, while a level of the face material is kept horizontal and constant by making a leading end of the screw abut on the floor slab; and subsequently, the leveling of the face material is performed by removing the screw after the gypsum material is hardened. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a finished foundation floor and a construction method thereof, and more particularly to a finished foundation floor and a construction method thereof that can be constructed at low cost on a floor slab made of a concrete material such as reinforced concrete and lightweight cellular concrete.

  Conventionally, concrete materials such as RC (steel reinforced concrete) and ALC (lightweight cellular concrete) that are used as floor foundations for buildings have a non-flat surface and are difficult to bond and nailing. was there. Therefore, it is difficult to directly apply a floor finishing material, and a method of using a floor, mortar placement, SL (self-leveling) material (see, for example, Patent Document 1) has been performed.

  In order to construct a floor of a building horizontally and smoothly using SL material, it is indispensable to provide fluidity without separation or breathing of aggregate in construction. In general, SL materials contain cement and / or gypsum as a hardening component, and in addition, various aggregate components, water reducing agents, thickeners, antifoaming agents, setting regulators, shrinkage reducing agents and the like are blended. However, in addition to strictly controlling the amount of various chemicals added in addition to the restrictions on the raw materials such as the maximum particle size, particle size distribution, and shape of the aggregate used, it is necessary to manage the fluidity sufficiently during on-site construction. It was.

By the way, although floor finishing is easily performed by sticking a face material on the floor slab, as described above, since the surface of the floor slab is rough, sufficient adhesion cannot be obtained. Therefore, it is indispensable to fill the depressions on the surface and smooth the surface, and the SL material is suitable as the material in terms of performance. However, the SL material is originally used for direct finishing of the floor, and is dense (high density) and has high strength so that it can withstand the bearing load (about 2 kg / cm ² ) from the floor surface. Therefore, there is a problem that the material cost is expensive.

From the above situation, there is a demand for a finished foundation floor that can be constructed on a floor slab at low cost.
JP2003-313069 (first page, second page)

  An object of the present invention is to provide a finished foundation floor that can be constructed at low cost on a floor slab made of a concrete material such as reinforced concrete, lightweight cellular concrete, and the construction method thereof in view of the above-mentioned problems of the prior art. There is.

  In order to achieve the above object, the present inventors have conducted extensive research on the finished foundation floor, and as a result, the plaster material is filled between the floor slab and the finish foundation face material installed on the upper surface of the floor slab. Then, when a finished foundation floor formed by forming a hardened body was constructed, it was found that a finished foundation floor that can withstand the bearing load from the floor surface can be constructed on the floor slab at low cost, and the present invention was completed. .

  That is, according to the first aspect of the present invention, there is provided a finished foundation floor in which a gypsum material is filled and cured between a floor slab and a finish foundation face material installed on the upper surface of the floor slab.

  According to a second aspect of the present invention, there is provided a finished ground floor according to the first aspect, wherein the gypsum material is a foamed gypsum material.

  According to a third aspect of the present invention, there is provided a finished ground floor according to the first aspect, wherein the face material has at least one opening having a honeycomb structure on the surface thereof. .

  Further, according to the fourth aspect of the present invention, after the face material for finishing base is installed on the upper surface of the floor slab, a screw long enough to penetrate the face material is inserted from the surface side of the face material. The level of the face material is kept horizontal and constant by abutting the front end portion thereof against the floor slab, and between the floor slab and the face material through at least one opening provided on the surface of the face material. The finishing according to any one of the first to third aspects, wherein a leveling of a face material is performed by filling a gap portion to be formed with a gypsum material and then removing the screw after the gypsum material is cured. A method for constructing a ground floor is provided.

  According to the finished foundation floor of the present invention, in the first invention, a finished foundation floor that can perform satisfactory floor finishing and can withstand a load bearing from the floor surface is provided. The value is extremely great. In addition, according to the second invention, foamed gypsum is used as the gypsum material, which is more preferable because the filling property of the gap between the floor slab and the face material is improved and the heat insulating property is also increased. According to the third aspect of the present invention, the opening serving as the exhaust port provided in the face material has a honeycomb-like structure, so that in the construction, the inlet for the kneaded material containing the gypsum material and the confirmation of the filling degree In addition to serving as a window, the strength of the opening can be maintained.

  Furthermore, according to the fourth aspect of the present invention, which is a finishing foundation floor construction method, it can be constructed at low cost on a floor slab made of a concrete material such as reinforced concrete, lightweight cellular concrete, etc., which is more advantageous. is there.

Hereinafter, the finishing foundation floor of the present invention and its construction method will be described in detail.
The finished foundation floor of the present invention is obtained by filling and curing a gypsum material between a floor slab and a surface material for finishing foundation installed on the upper surface thereof.

In the finishing foundation floor of the present invention, it is important to combine a face material and a gypsum material capable of performing a good floor finish. As a result, a finished foundation floor that can withstand the load from the floor can be constructed on the floor slab at low cost.
That is, when the bearing load from the floor surface (about 2 kg / cm ² ) corresponds to the finished ground floor made of the hardened body of the plaster material injected with the face material, the hardened body is dispersed load from the floor surface. It should be strong enough to withstand. The dispersion load depends on the face material, but about one hundredth of the bearing load, for example, about 0.02 kg / cm ² is sufficient. Therefore, as the gypsum material, a material that is hardened at an earlier stage than the ultimate strength of the cured body to obtain a desired strength can be used.

The gypsum material used for the finished foundation floor of the present invention is not particularly limited, and can be injected into the gap between the floor slab and the face material for the finished foundation, and can be cured early to exhibit a desired strength. Although what is obtained can be used, for example, gypsum alone as a hardener, cement or a mixture of cement and fine sand as a main component can be used.
Furthermore, a gypsum material having foaming properties such as foamed gypsum is preferable because it enhances the filling property of the gap between the floor slab and the face material and also improves the heat insulating property.

  As the gypsum, at least one gypsum selected from the group consisting of β hemihydrate gypsum, α hemihydrate gypsum, and anhydrous gypsum is used, and calcined gypsum containing β hemihydrate gypsum as a main component is preferable.

  In the injection of the gypsum material, a kneaded product with water containing the gypsum material is prepared in advance. Here, the blending amount of water with respect to the gypsum is adjusted so as to obtain a kneaded product capable of obtaining good fluidity and a cured state without breathing. Usually, 70 to 120 parts by weight of kneaded water is blended with 100 parts by weight of gypsum.

  Although it does not specifically limit to the said kneaded material, The commercially available setting regulator which has the effect | action which accelerates | stimulates or delays the hardening reaction of gypsum can be added in a predetermined amount. Usually, 0.01 to 1 part by weight of a setting regulator is added to 100 parts by weight of gypsum. Further, a thickening agent such as polyvinyl alcohol and cellulose, and a fibrous substance such as glass fiber, carbon fiber, and natural fiber, which are strength reinforcing materials, can be blended together with the setting regulator.

  The foamed gypsum is not particularly limited, and can be obtained by a method of mixing a lightweight aggregate and / or a method of using a foaming agent. In the former, a predetermined amount of lightweight aggregate such as shirasu balloon, pearlite, vermiculite is mixed and dispersed in the kneaded material. In the latter, a method is used in which a surfactant is added to the gypsum slurry to cause foaming, or a method in which a surfactant and a bubble stabilizer are added to water and foamed in advance is added to the gypsum slurry. A commercially available anionic surfactant or the like is used as the surfactant.

  The foamed gypsum is not particularly limited, but includes a coagulation regulator, a thickener such as polyvinyl alcohol and cellulose, and a fibrous material such as glass fiber, carbon fiber, and natural fiber as a strength reinforcing material. Can be blended.

  The method for producing the kneaded material containing the gypsum material is not particularly limited, and a usual method for preparing a gypsum slurry for casting is used. For example, hemihydrate gypsum, a foaming agent and / or a lightweight bone are used. A method of obtaining a kneaded product by kneading a material, a setting controller, etc., and a kneading water, if necessary, at a high speed with a mixer, or a method of adding bubbles previously foamed to a gypsum slurry Is used.

The surface material used in the finishing subfloor, but are not particularly limited, materials Bearing load from the desired floor (about 2 kg / cm ²⁾ is obtained, for example, hardboard (HB), cosmetics A board, a plywood, a particle board, or the like is used. Among them, a plywood or a particle board having particularly good interior workability, for example, screwing, nailing and adhesion is preferable.

  The thickness of the face material is not particularly limited, and a commonly used thickness, for example, 6, 9, or 12 mm, is used depending on the application.

  The face material may be provided with at least one opening on the surface thereof. The said opening part plays the role of an exhaust port, and the required number is provided. The opening also serves as a window for visually confirming the degree of filling when the kneaded material containing the gypsum material is poured between the floor slab and the finishing base material. Further, the opening can be used as an inlet for a kneaded material containing a gypsum material.

The shape and size of the opening are not particularly limited, but a shape and size that do not hinder the finishing material such as a floor board and a floor floor to be constructed on the face material are preferable.
The structure of the opening is not particularly limited, but a honeycomb structure capable of maintaining the strength as a face material is preferable.

A specific example of the construction of the finished foundation floor of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of the construction of the finished foundation floor of the present invention.
In FIG. 1, a foamed gypsum 3 is filled between a floor slab 1 and a plywood 2. The leveling screw 4 is inserted through the face material from the surface side of the plywood 2 so that the tip of the leveling screw 4 is brought into contact with the floor slab 1. A finishing material 5 is applied on the plywood 2. Moreover, when providing the partition wall 6, it can carry out by the nail 7 strike.

The construction method of the finishing foundation floor is not particularly limited, but is performed by pouring a kneaded material containing a gypsum material prepared in advance from the inlet after leveling the face material.
For example, after installing a finishing base material on the upper surface of the floor slab, insert a screw long enough to penetrate the surface material from the surface side of the surface material, and bring the tip of the screw into contact with the floor slab. By filling the gap formed between the floor slab and the face material from at least one opening provided on the surface of the face material, while maintaining the level of the face material horizontal and constant, Next, a method of leveling the face material by removing the screw after curing the gypsum material is preferable.

The number of screws used in the above method is not particularly limited, but is preferably 3 per face material in order to maintain horizontality. Moreover, iron etc. are used as a material of the screw used by the said method.
Here, the leveling of the face material can be performed by using a leveling screw and fixing to a certain level using a wood screw.

The injection port for the kneaded material containing the gypsum material is not particularly limited, and an additional injection port can be provided in addition to using the opening. For example, an opening is made in the joint portion or the like of the face material for the finishing base, and the sealing is performed after the pouring is completed.

EXAMPLES The present invention will be described in more detail below with reference to examples of the present invention, but the present invention is not limited to these examples.
Example 1
A plywood having a honeycomb structure opening (thickness 12 mm) was fixed to the upper part of the RC floor slab using three leveling screws so that the thickness of the gypsum layer was about 30 mm. Thereafter, with respect to 100 parts by weight of commercially available calcined gypsum, 0.05 part by weight of sodium citrate, 0.10 part by weight of an anionic surfactant and 80 parts by weight of kneaded water were weighed as a coagulation regulator. Kneaded for 5 minutes to foam. Subsequently, the obtained foamed gypsum slurry was poured from an inlet provided separately. Here, the opening of the plywood was used as a window for checking the degree of filling, and it was confirmed that the gypsum had entered the middle of the opening, and the supply of the foamed gypsum slurry was stopped. Thereafter, the finished foundation floor was completed upon completion of the curing of the foamed gypsum.
The finished ground floor was horizontal and smooth, and there were no problems in the construction of the finishing material and partition walls. Further, the strength was able to withstand a bearing load (about 2 kg / cm ² ) from the floor surface.

  As is clear from the above, the finishing foundation floor and its construction method of the present invention are suitable as a finishing foundation floor and its construction method that can be constructed on a floor slab of concrete material used in the construction field at a low cost. is there.

It is sectional drawing showing an example of construction of the finishing foundation floor of this invention.

Explanation of symbols

1 Floor slab 2 Plywood 3 Foamed gypsum 4 Leveling screw 5 Finishing material 6 Partition wall 7 Nail

Claims (4)

  A finished foundation floor in which a gypsum material is filled and cured between the floor slab and the finished foundation face material installed on the top surface.   The finished foundation floor according to claim 1, wherein the gypsum material is a foamed gypsum material.   2. The finished ground floor according to claim 1, wherein the face material has at least one opening having a honeycomb structure on a surface thereof.   After installing the base material for the finishing base on the upper surface of the floor slab, insert a screw long enough to penetrate the surface material from the surface side of the surface material, and bring its tip into contact with the floor slab Filling the gap formed between the floor slab and the face material from at least one opening provided on the surface of the face material while maintaining the level of the face material horizontal and constant, The method for constructing a finished foundation floor according to any one of claims 1 to 3, wherein the leveling of the face material is performed by removing the screws after the gypsum material is cured.

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