JPH0678681B2 - Leveling method for uneven floors - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for leveling (adjusting the unevenness) of a floor having unevenness in a building, a warehouse or the like using a synthetic resin leveling material.

[Conventional technology]

Conventionally, for leveling construction of uneven floors, a method of construction using a gypsum-based or cement-based inorganic material-based leveling material or a synthetic resin-based leveling material mixed with an inorganic aggregate such as calcium carbonate has been used. There are known methods for construction.

[Object of the Invention]

Conventionally, the unevenness of foundation concrete that occurs in buildings etc. is assumed to be about 30 mm at the maximum, and the leveling material for adjusting such unevenness is a cement-based leveling material with a large specific gravity. It was possible to respond. However, recently, there are cases where the unsteady amount of the base concrete is 60 to 70 mm with respect to the span interval of 7 m, and in such a case, the leveling material with high specific gravity such as cement as described above is high. It became a heavy load and hindered the durability of the building.

First, the applicant of the present invention has filed Japanese Patent Application No. 63-171290 (JP-A-2-49064).
No.) disclosed a self-leveling material based on synthetic resin with a low specific gravity.
A considerable amount of the synthetic resin-based self-leveling material is required, and it is unavoidable that it is lightweight but high in cost. Further, as one means to reduce the cost of the synthetic resin self-leveling material, increasing the amount of the lightweight aggregate mixed in the synthetic resin self-leveling material is one means.
Since the lightweight aggregate has a small particle size and is bulky, the mixing operation is difficult, and the mixing amount is limited, which is not practical.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems as described above, to provide a lightweight and low-cost leveling material, and to achieve leveling construction on a uneven floor using the leveling material.

[Means for achieving the purpose]

In order to achieve the above object, the construction method of the present invention is finished with a two-layer structure including a filling layer made of a synthetic resin type leveling material and a finishing layer made of a synthetic resin type self-leveling material.

The synthetic resin type leveling material for the filling layer and the synthetic resin type self-leveling material for the finishing layer used in the present invention are prepared as follows.

a. Synthetic resin-based leveling material for filling layer; synthetic resins include epoxy-based resins, polyurethane-based resins, silicone-based resins, etc. Of these, epoxy-based resins are preferred in terms of hardness after curing, curing shrinkage, etc. When preparing the resin liquid, the particle size should be 20% with respect to 100 parts by weight of the epoxy resin.
20-200 parts by weight of micron or more micro aggregate and particle diameter 25 mm
20 to 300 parts by weight of the following coarse-grained aggregate is added and mixed.

As the above epoxy resin, bisphenol A type,
Preferred are epoxy resins which are liquid at room temperature, such as bisphenol F type, and as curing agents, amines which are liquid at room temperature and harden at room temperature, such as diethylenetriamine and triethylenetetramine.

As a micro aggregate, the particle size is 20 microns or more and the specific gravity is 3.
Those having properties of 0 or less are preferable, and one or a mixture of two or more of the following is used. Inorganic or organic micro hollow bodies such as glass balloons, silica balloons, alumina balloons, aluminosilicate balloons, phenolic balloons, vinylidene chloride balloons, or inorganic foams containing silica, alumina, magnesium oxide, calcium carbonate, etc. Examples include fine powder of the body. The surface of these minute hollow bodies, minute powders, etc. is plated with a metal such as copper, aluminum, nickel, etc., the metal powder, metal oxide powder such as iron oxide, titanium oxide, etc., silica, alumina, calcium carbonate, etc. It may be coated with a synthetic resin compound containing an inorganic filler, such as an epoxy resin, a polyester resin, or a silicone resin. Examples of commercially available products include Showa Denko KK: Show Balloon QS (trade name) and Nippon Philite Co., Ltd .: Philite (trade name). Here, the specific gravity of the aggregate refers to the apparent specific gravity unless otherwise specified.

Further, as the coarse-grained aggregate, silica, alumina, calcium carbonate, an inorganic aggregate mainly composed of magnesium oxide, for example, shale fired, particle size 25 mm or less obtained by sieving cooled, specific gravity 0.8 ~ 2.0 Inflatable shale, etc., and commercially available examples include Mesalite Industrial Co., Ltd .: Mesalite (trade name) non-water type. As the coarse-grained aggregate, in addition to the above-mentioned inorganic aggregate, a synthetic resin-based aggregate such as polyethylene pellets and vinylidene chloride beret, or a metal-plated or coated surface of the synthetic resin-based aggregate is used. It is possible to add the above coarse-grained aggregates individually or in a mixture of two or more kinds.

The synthetic resin-based leveling material for a packed bed of the present invention is a combination of fine aggregates and coarse-grained aggregates. This is because the coarse-grained aggregate alone has a high porosity, and the synthetic method for filling the voids is high. The amount of resin used increases, and therefore, even with a synthetic resin having a small curing shrinkage, dents or the like are likely to occur. In order to prevent this, in the present invention, both are used together, and the voids between the coarse-grained aggregates are filled with the synthetic resin and the fine aggregates.

Regarding the particle diameters of the fine aggregate and the coarse aggregate, the fine aggregate may have a particle diameter that fills the voids between the coarse aggregates. However, if the particle size of the fine aggregate is less than 20 μm, the thixotropic property increases and the leveling property deteriorates. Further, if the particle diameter of the coarse-grained aggregate exceeds 25 mm, irregularities appear on the surface, which makes it difficult to perform the self-leveling material in the next step.

As other additives, antifoaming agents, surfactants, fillers such as silica powder, reactive diluents such as butyl glycidyl ether, o-cresyl glycidyl ether, p-tert butylphenyl glycidyl ether, or DOP, DBP, Non-reactive diluents such as benzyl alcohol, high boiling aromatic hydrocarbon compounds and the like may be used.

b. Synthetic resin-based self-leveling material for finishing layer: Synthetic resins include epoxy-based resins, polyurethane-based resins, silicone-based resins, etc. Epoxy-based resins are preferred as in (a). 20 to 200 parts by weight of a fine aggregate having a particle diameter of 20 to 500 microns is added to 100 parts by weight of the epoxy resin.

The epoxy resin is an epoxy resin such as bisphenol A type and bisphenol F type which is liquid at room temperature as in (a), and the curing agent is liquid at room temperature such as diethylenetriamine and triethylenetetramine and is cured at room temperature. Amines are preferred.

The fine aggregate may be the same as the fine aggregate used in (a) and may be used in combination of at least one of these. It is desirable that the specific gravity of the combined materials is about the same as the specific gravity of the synthetic resin. With respect to the particle size of the fine aggregate, if the particle size is less than 20 microns, the preparation liquid thickens, thixotropic property increases and self-leveling property deteriorates, and conversely the particle size is 500.
If it exceeds micron, there is a drawback that fine irregularities appear on the finished surface appearance.

Other additives include color pigments, defoamers, surfactants, fillers such as silica powder, butyl glycidyl ether,
Reactive diluent such as o-cresyl glycidyl ether, p-tert butylphenyl glycidyl ether, or DO
Non-reactive diluents such as P, DBP, benzyl alcohol, high boiling aromatic hydrocarbon compounds may be used.

The leveling construction method for a floor with unevenness of the present invention is carried out by pouring the synthetic resin type leveling material for a packed bed (a) adjusted as described above so as to be about 70 to 80% of the amount of unevenness, and using a trowel or the like. After the leveling resin is cured, (b) the synthetic resin type self-leveling material for the finishing layer is poured into the remaining 30 to 20%, and finishing is performed by using a T-shaped coating assisting device or the like.

In addition to the above-mentioned direct construction on the floor base, the construction may be carried out after the floor base has been treated with a primer such as an epoxy resin.

〔Example〕

Preparation of synthetic resin-based leveling material for packed bed; 85 parts by weight of bisphenol A glycidyl ether type epoxy resin having an epoxy equivalent of 190 as an epoxy resin and 30 parts by weight of benzylethylenediamine as a curing agent were added to a reactive diluent butyl. Showa Denko with 15 parts by weight of chrysidyl ether, 0.2 parts by weight of silicone-based defoaming agent, and 0.5 parts by weight of fluorine-based surfactant, silica-alumina-based fine aggregate with a particle size of 110 microns and a specific gravity of 0.7 ( 140 balloons of Show Balloon BS SG manufactured by Co., Ltd., and 140 weight parts of Mesalite (non-hydrated type) manufactured by Nippon Mesalite Industries Co., Ltd. having a particle diameter of 5 mm and a specific gravity of 1.4 as coarse aggregate are added and mixed. A synthetic resin leveling material for a packed bed is obtained.

b. Preparation of synthetic resin type self-leveling material for finishing layer; 85 parts by weight of bisphenol A glycidyl ether type epoxy resin having an epoxy equivalent of 190 as an epoxy resin and 30 parts by weight of benzylethylenediamine as a curing agent were added to a reactive diluent. 15 parts by weight of butyl chrysidyl ether,
Silicone defoamer 0.2 parts by weight, Fluorine surfactant 0.5
To the composition containing 1 part by weight, aluminosilicate spherical hollow bodies as fine aggregates have a particle diameter of 150 microns and a specific gravity of 0.7.
ZEEOSPHERS 600 manufactured by ZEELAN INDUSTRIES INC. With 90 parts by weight of Phillite 52 / 7S manufactured by Nippon Philite Co., Ltd. and a spherical diameter of silica-alumina type with a particle diameter of 180 microns and a specific gravity of 2.0.
50 parts by weight of is mixed in to obtain a synthetic resin self-leveling material for the finishing layer.

The above-mentioned (a) synthetic resin-based leveling material for a packed bed and (b)
Table 1 shows the properties of the synthetic resin self-leveling material for the finishing layer. As a comparative example, (b) a fine aggregate of a synthetic resin-based self-leveling material for the finishing layer has a particle diameter of 2 microns and a specific gravity of 2.7.
The thing changed into the fine powder of calcium carbonate of is shown.

c. Construction method: As a primer, for example, Aika Kogyo Co., Ltd.
Epoxy resin primer such as Joliace JE-50 manufactured by
It is applied as a pre-treatment for leveling construction on a concrete floor with a maximum of 60 mm over 7 m. Next, the synthetic resin leveling material for the packed bed (a) adjusted as described above is poured into the above-mentioned non-bed to a height of 50 mm, the surface is smoothed with a trowel or the like, and after resin curing, (B) The synthetic resin self-leveling material for the finishing layer is poured into the remaining portion, and the surface is leveled with a T-shaped coating assisting device or the like to achieve the leveling method for leveling a floor with unevenness of the present invention.

Table 2 shows the usage amount of the leveling material when applied based on the examples, and the usage fee when applied with only the synthetic resin self-leveling material for the finishing layer and when applied with the leveling material of the comparative example.

[Effect] In the present invention, as is clear from Tables 1 and 2, even if the floor is large and uneven, a high load is not applied.
Durability can be obtained from the structural aspect of the building without burdening the beams.
Further, in the synthetic resin-based leveling material, the amount of synthetic resin used, which causes a high cost in the material cost, can be reduced by the construction method of the present invention, which is also advantageous in terms of cost. Furthermore, the aggregate used for the synthetic resin leveling material for the packed bed has a coarse particle diameter, so that the resin liquid can be easily prepared.

In the present invention, the surface is finished with a synthetic resin self-leveling material, so that a smoother finished appearance is obtained rather than the uneven surface finish like the plaster-based or cement mortar-based leveling material, and when a machine is desired to be installed. There is also an advantage that the level can be easily set.

Claims (1)

[Claims] 1. A synthetic resin leveling material containing a fine aggregate having a particle diameter of 20 microns or more and a coarse aggregate having a particle diameter of 25 mm or less is applied to a synthetic resin as a filling layer, and then the synthetic resin is subjected to particles. A leveling construction method for a floor with unevenness, which comprises applying a synthetic resin self-leveling material containing a minute aggregate having a diameter of 20 to 500 microns as a finishing layer.