JP4945254B2 - Non-land surface adjustment composition, non-land surface adjustment material, and method of constructing a floor structure using the non-land surface adjustment material - Google Patents

Description

  The present invention relates to a composition for adjusting the unevenness, the unevenness adjusting material, and a method for constructing a floor structure using the unevenness adjusting material.

  As a floor structure in each dwelling unit of a conventional apartment house, a so-called double floor is constructed. As shown in FIG. 5, the double floor 13 is provided with dumpling-like unevenness adjusting materials 15 on the upper surface of the concrete slab 14 at appropriate intervals, and a thermoplastic foam resin is formed on the unevenness adjusting material 15. The lower floor 17 is formed by closely laying the floor base material 16 to be formed, and the finishing material 18 is stuck on the lower floor 17 for construction. As another method for constructing a floor structure, for example, the invention of JP-A-2005-133421 is known.

In addition, as a method of adjusting the unevenness of the floor surface, there is a method in which a self-leveling material typified by a gypsum system or a cement system is poured onto a slab with a thickness of several tens of millimeters to adjust the unevenness of the entire floor surface. Generally known. As a method for forming such a floor surface, for example, the invention of Japanese Patent Laid-Open No. 2-28269 is known.
JP 2005-133421 A Japanese Unexamined Patent Publication No. Hei 2-28269

  However, in the construction method of the floor structure as described above, since the unevenness adjusting material is manufactured with cement, sand and water, after the installation of the unevenness adjusting material, it is 24 hours or more in summer and 48 hours or more in winter. During this period, there was a problem that work efficiency was poor without entering the lower floor.

  Moreover, about the formation method of the floor surface using a self-leveling material, the uneven state may remain locally, and it was necessary to perform the uneven adjustment of the part.

  The present invention has been made in view of the above problems, and its purpose is to shorten the curing period of the non-land adjuster and improve work efficiency, the non-land adjuster, the non-land adjuster and the non-land adjuster. It is to provide a method for constructing a floor structure using a conditioning material.

  The composition for unevenness adjustment of the present invention is characterized by comprising 200 to 700 parts by weight of sand, 30 to 300 parts by weight of cement, and a curing regulator with respect to 100 parts by weight of calcined gypsum.

  In addition, the curing time when the unevenness adjusting material is mixed by adding 10 to 20 parts by weight of water to 100 parts by weight of the composition for adjusting unevenness of claim 1 is 1 considering the workability at the time of installation. It is more than time, Preferably it is 1 to 6 hours in order to make the required curing time within 16 hours.

  When the amount of calcined gypsum is less than 200 parts by weight with respect to 100 parts by weight, workability at the time of kneading and installation is deteriorated, and when it exceeds 700 parts by weight, the adhesive strength is lowered. If the cement is less than 30 parts by weight or more than 300 parts by weight, the adhesive strength decreases. Further, when a higher fatty acid salt is used as a curing modifier, if less than 0.005 parts by weight, kneading and installation work becomes difficult, and if it exceeds 0.1 parts by weight, the adhesive strength is lowered. Further, when water is less than 10 parts by weight with respect to 100 parts by weight of the composition for adjusting unevenness, kneading cannot be performed, and when it exceeds 20 parts by weight, the adhesive strength is lowered.

  In addition, the floor structure is constructed by forming the unevenness adjusting material according to claim 2 into a dumpling shape and installing it on the upper surface of the slab at an appropriate interval, and then forming an underfloor made of a thermoplastic foam resin on the dumpling shape unevenness adjusting material. A lower floor is formed by spreading ground materials closely, and a finishing material is stuck on the lower floor.

  Moreover, it includes installing a non-land adjustment material in the space | interval which the non-land adjustment material after non-land adjustment does not contact mutually. This is because in the situation where the non-land adjusters are in contact with each other during the non-land adjustment, there is not enough space for the non-land adjust materials to be deformed, so it takes time for the non-land adjustment work, or obtains the desired level and sufficient smoothness. This is to avoid deficiencies in the unevenness adjustment that cannot be performed. Furthermore, since the unevenness adjusting material has a property that the strength is improved by drying, the ventilation time in the vicinity of the unevenness adjusting material is secured, and the curing time is shortened by sufficiently drying the unevenness adjusting material. .

Further, the method for constructing the floor structure includes applying a primer between the floor base material and the unevenness adjusting material, and the adhesive strength between the floor base material and the unevenness adjusting material being 0.12 N / mm ² or more. In addition, a primer is applied between the upper surface of the slab and the unevenness adjusting material, and the adhesive strength between the upper surface of the slab and the unevenness adjusting material is 0.12 N / mm ² or more.

  Since the adhesive strength necessary for entering the lower floor can be obtained after curing for up to 16 hours after installation of the unevenness adjusting material, work efficiency is improved.

  Hereinafter, an embodiment of a construction method of a floor structure of the present invention will be described with reference to the drawings. 1 and 2 are a cross-sectional view and a plan view showing the floor structure 1 of the first embodiment. In this floor structure (double floor) 1, a dumpling-shaped unevenness adjusting material 4 is installed on the upper surface of a concrete slab 2 of an apartment house, and a floor base material 5 is closely installed on the unevenness adjusting material 4. Thus, the lower floor 6 is formed, and the finishing material 7 is spread on the lower floor 6.

The unevenness adjusting material 4 is composed of 200 to 700 parts by weight of sand, 30 to 300 parts by weight of cement, and 0.005 to 0.1 parts by weight of a hardening adjusting agent with respect to 100 parts by weight of calcined gypsum. 10 to 20 parts by weight of water is added to 100 parts by weight of the composition for mixing. This curing time is adjusted to 1 to 6 hours, the workability at the time of construction is good, and the adhesive strength of 0.12 N / mm ² is expressed by curing for 1 to 16 hours after construction using a primer together It is. Therefore, when a double floor is constructed using the unevenness adjusting material 4, an operator can enter the double floor from the next day to perform other work.

  The installation interval of the unevenness adjusting material is 100 to 200 mm, more preferably about 150 mm. When the installation interval is set to 150 mm in this way, about 20 to 24 unevenness adjusting materials 4 are installed per floor base material having a size of 595 mm × 900 mm. This is the interval at which the non-land adjustment materials after the non-land adjustment do not contact each other, and thus the non-land adjustment materials 4 do not contact each other even after the non-land adjustment.

  Further, in the composition for unevenness adjustment, calcined gypsum is an important component that imparts the curing time shortening performance of the unevenness adjusting material 4, and β-type hemihydrate gypsum, α-type hemihydrate gypsum, type III anhydrous gypsum, or those It is a mixture of The sand is quartz sand, recycled aggregate, or tankal sand (4-6). As the cement, ordinary Portland cement, early-strength Portland cement, blast furnace cement, or the like can be used. Also, a higher fatty acid salt is mixed as a curing regulator for slowing the curing rate and adjusting the pot life.

  On the other hand, the floor base material 5 is a foamed resin composite, and includes a lower member 8 made of a foamed resin such as a polystyrene resin, a polyolefin resin, or urethane, and a hard thermoplastic foamed resin installed on the upper surface of the lower member 8. The finishing material 7 is fixed to the pier 9 with a nail 10.

  Next, the construction method of the floor structure 1 using the above unevenness adjusting material 4 will be described. First, as shown in FIG. 3, an adhesive such as a primer is applied to the upper surface of the concrete slab 2, and a large number of dumpling-like unevenness adjusting materials 4 are installed on the upper surface of the concrete slab 2. A floor base material 5 is installed. When the floor base material 5 is pushed downward with the upper surface of the joist 3 as a reference line when installed on the inner periphery of the room, the upper portion of the non-land adjustment material 4 is crushed and the non-land and the level can be adjusted.

  Next, after the first row of the floor base material 5 is installed, the second row of the uneven land adjuster 4 is installed at the place where the second row of the floor base material is installed. And while installing the floor base material 5 by the same method as the above, the floor base material 5 is brought into close contact with the entire surface of the concrete slab 2 by sequentially repeating this process to form the lower floor 6. Then, the floor structure 1 is constructed by spreading the finishing material 7 on the lower floor 6.

  In addition, although the floor base material 5 was installed one row at a time, it is not limited to this, and a plurality of rows such as two rows or three rows can be installed. Furthermore, it is possible to install one by one instead of by column.

Table 1 below shows the adhesive strength and compressive strength of the unevenness adjusting material 4 with time. FIG. 4 shows changes in curing time and adhesive strength after the installation of the unevenness adjusting material of Example 2 and Comparative Example 1 in Table 1. In Comparative Example 1, which is a conventionally used unevenness adjusting material, the contact strength is only 0.07 N / mm ² at a curing time of 16 hours, whereas in Example 2, it is 0.20 N / mm ² , which is sufficient. It can be seen that the practical strength has been reached.

  In Table 1 above, “◯” indicates that the strength is good and “×” indicates that the strength is insufficient. In the table, “◯” in * 2 indicates that the iron break is good, and “×” indicates that the iron is bad.

  In this case, the floor base material is nedafoam (manufactured by Yuka Sansho Building Materials Co., Ltd.), the primer is nedaite (manufactured by Yuka Sansho Building Materials Co., Ltd.), the plaster is β-type hemihydrate gypsum (manufactured by Yoshino Gypsum Co., Ltd.) Is normal Portland cement (manufactured by Taiheiyo Cement Co., Ltd.), and the aggregate is natural silica sand (JIS No. 26).

  Moreover, Example 1 and Example 2 change the mixture ratio of each component, and are in the range which does not have a problem on construction, although there is a difference in compressive strength. Further, Example 3 shows the influence when the ambient temperature is lowered, but both the compressive strength and the adhesive strength are within the range where there is no problem even in an environment of 5 ° C. assuming winter. On the other hand, both Comparative Example 1 in which the blending ratio of calcined gypsum was 0, Comparative Example 2 and Comparative Example 3 in which the curing adjusting material was outside the appropriate range, lacked adhesive strength. As described above, it is possible to confirm that the adhesive strength and the compressive strength that allow the operator to enter the double floor and perform other operations can be obtained by curing for 16 hours after the installation of the unevenness adjusting material 4. did it.

It is a floor structure of a 1st embodiment, (1) is a sectional view and (2) is an expanded sectional view of an unevenness adjusting material. It is a top view of the floor structure of a 1st embodiment. (1) is a plan view in which the unevenness adjusting material is installed in the first row of additional striking layers, and (2) is a plan view in which the floor base material is installed in the first row of unevenness adjusting material. It is a graph showing the adhesive strength by the time-dependent change of a non-land surface adjustment material. (1) And (2) is sectional drawing of the construction method of the conventional floor structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,13 Floor structure 2,14 Concrete slab 3 Inkita 4,15 Non-land surface adjustment material 5,16 Floor base material 6,17 Lower floor 7,18 Finishing material 8 Lower member 9 Pier 10 Nail

Claims (6)

  A composition for unevenness adjustment comprising 200 to 700 parts by weight of sand, 30 to 300 parts by weight of cement, and a hardening adjusting agent with respect to 100 parts by weight of calcined gypsum.   Curing time when adding and mixing 10-20 weight part of water with respect to 100 weight part of the composition for unevenness adjustment of Claim 1 is 1 hour or more, The unevenness adjusting material characterized by the above-mentioned.   After the unevenness adjusting material according to claim 2 is dumped and placed on the upper surface of the slab at an appropriate interval, a floor base material made of a thermoplastic foam resin is closely spread on the dumpling unevenness adjusting material. A method for constructing a floor structure, characterized in that a floor is formed and a finishing material is stuck on the lower floor.   The method for constructing a floor structure according to claim 3, wherein the unevenness adjusting materials after the unevenness adjustment are installed at intervals at which the unevenness adjusting materials do not contact each other. 5. The primer according to claim 3, wherein a primer is applied between the floor base material and the unevenness adjusting material, and an adhesive strength between the floor base material and the unevenness adjusting material is 0.12 N / mm ² or more. To build a floor structure. The floor structure according to claim 3 or 4, wherein a primer is applied between the upper surface of the slab and the unevenness adjusting material, and an adhesive strength between the upper surface of the slab and the unevenness adjusting material is 0.12 N / mm ² or more. How to build.

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