JPH0579634B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for constructing a door-bounding wall that has excellent workability and good fire resistance, heat insulation, and sound insulation properties.

(Conventional technology) A boundary wall is a partition wall that completely separates a living space such as a building or a concrete house from a neighboring house.In the case of an RC wall or a PC version of a boundary wall, the construction method is as follows: First, a mortar base is applied on top of it, and after its adjustment, tiles or vinyl cloth are applied as a finishing touch.Then, as shown in Fig. This is accomplished by filling the gap between the boundary wall b and the sealing material a made of a heat insulating material such as mortar or rock wool.

(Problems to be Solved by the Invention) However, in the above-mentioned prior art, preparation of the base for the RC wall or PC board requires manpower and a considerable amount of time, and mortar is used for sealing the joint with the beam or column. Adhesiveness was also insufficient and partial peeling occurred after drying, so strong bonding, sufficient sealing performance, and easy workability could not be expected.

Even if the partition wall is fire-resistant and heat-insulating, it is not possible to provide sufficient fire-resistance, heat insulation, sound insulation, airtightness, etc. to the joints between it and the beams and columns, making it impossible to create an ideal partition wall. The construction structure had not yet been completed.

(Means for Solving the Problems) In view of the above problems, the inventor has conducted extensive research and found that
We have developed a sealing material suitable for construction of the above-mentioned door boundary walls.

By using this material to securely construct a partition wall, it is possible to easily provide a building that is better than previous ones.

That is, the present invention provides a method of constructing a door-bounding wall for fixing the door-bounding wall to a building frame, in which 20 to 65% by weight of cement and 80 to 35% by weight of aggregate are used as a sealant for fixing.
For the total amount of the mixture consisting of 100% by weight,
Raw coke 4.5-14% by weight, scaly mica 4.5-9
% by weight, 5 to 15% by weight of borax, 5 to 30% by weight of glaze, and 20 to 45% by weight of an organic foam adhesive.

As an example of the structure of a partition wall, there is one whose vertical cross section is shown in Figs. 2 to 4, in which two panel members 1 are erected facing each other with a space 4 in between between the upper and lower flooring materials. has been done. Then, on the surface thereof, tiles 3 are pasted through a calcium silicate layer 2 (Fig. 2), a decorative board 5 such as a decorative plaster board or a decorative asbestos board is pasted (Fig. 3), or rock wool is pasted. Attach the filling decorative panel 6 (4th
Figure).

As shown in the figure, the method for sealing the joint with the beam and/or column is to fill the gap between the beam and/or column (c) and the door boundary wall (b) disposed closely to the beam and/or column with the sealing material (a) according to the present invention. , by leaving it for a certain period of time. The filling of the sealing material a is carried out by inserting and filling the sealing material mixed with water into the gap between the beam or column c and the door boundary wall b using a filling tool such as a trowel.

Next, the sealing material according to the present invention will be explained.

In the composition of the sealant, various types of cement such as commercially available alumina cement and Portland cement are used as the cement, silica sand, calcite, marble, fly ash, etc. are used as the aggregate, and high temperature of 250℃ or more is used as the raw coke. Pitch coke, tar pitch, straight-run residual oil, etc., which sometimes undergo thermal decomposition polycondensation to produce optically anisotropic liquid crystal mesophase, are used for flaky mica, and flat mica such as biotite and muscovite are used for borax. Use crystalline powders such as pentahydrates and decahydrates, organic foaming adhesives such as isocyanate-based and urethane-based adhesives (self-foaming ones are better), and glazes with relatively high Melting point glaze, ordinary melting point glaze, and lead borate based,
A material with a low melting temperature such as thallium lead borate type or phosphate type is used.

In order to use the above compound as a sealing material for door walls, it is sufficient to add and knead an appropriate amount of water, but the amount of water added is usually 16 to 30 parts by weight per 100 parts by weight of the above compound.
Add part by weight.

In the above formulation, cement not only contributes to high strength as a binder but also acts as a refractory material when subjected to flame heating. In particular, when alumina cement is used as the cement, uniform and fine foaming of the cast molded product is promoted, a flexible and strong sealing material is obtained, and its fire resistance is increased. Furthermore, raw coke (pitch coke) is produced in a non-oxidizing atmosphere at a temperature of 250℃ or higher.
It produces a carbonaceous material with a mesophase crystal structure that is fire-resistant and has high high-temperature strength, and penetrates into the compound structure to make the entire sealing material fire-resistant and high-strength. Since scaly mica inherently has low heat conductivity in the thickness direction, even if it receives sudden heat from outside the sealing material surface, the scaly mica arranged in a layer along the sealing material surface will absorb the heat. Most of the heat does not transfer to the inside of the sealing material, and it protects the inside of the sealing material. The addition of borax causes an endothermic reaction and released water due to the release of crystallized water when the temperature exceeds 100°C, since borax forms penta- or decahydrates and contains a large amount of crystallized water. This prevents the combustion of the sealing material, and furthermore, when the temperature rises, alumina,
It reacts with inorganic components such as silica, lime, and scaly mica to form a glass compound, forming a binder or high heat barrier.

When limestone is used as aggregate, when placed in an environment with elevated temperatures, it thermally decomposes and generates CO ₂ gas, reducing the O ₂ content in the bubbles and remaining in the sealing material, making it flame retardant. It contributes to the improvement of raw coke and helps the raw coke to become mesophase.

Isocyanate-based, urethane-based, and epoxy-based adhesives are used as organic foamable adhesives, and serve to make the sealing material porous and lightweight.
During the production of the sealing material and at normal temperatures, these act as adhesives between the respective compounded components, as shape-retaining agents, and as flexibilizing agents for the product. Further, as a foaming agent, for example, a self-foaming foaming agent such as polysilosane may be used.

Instead of using one type of glaze, use a combination of several types of glazes, such as those with a relatively high melting point, those with a normal melting point, and those with a low melting point. is preferred. Examples of low melting point products include PbO−B ₂ O ₃ system,
B ₂ O ₃ −PbO−Tl ₂ O system, NaO−P ₂ O ₅ system, P ₂ O ₅ −
Select PbO-based, NaO-P ₂ O ₅ -SiO _2- based, or Zegel cone composition with various melting points, etc.
can be used.

When this low melting point glaze is heated due to a fire, etc., the borax is
At 200°C, it emits crystallized water and exhibits fireproofing (fireproofing) properties, and then becomes fireproof when the temperature reaches 200°C or higher. In addition, some other ingredients can be made by acting as a glaze; for example, borax has an anhydrous content of 740%.
Since it melts into glass at around ℃, it can act as a fire-resistant glaze at that temperature.

The glaze with a normal melting point or a high melting point may be appropriately selected and used from well-known enamel glazes, ceramic glazes, and the like.

The glaze is used by preparing glaze powders with various melting points, for example, 400, 600, 800°C, and mixing them into the building material formulation at the same time. In this case, in response to external heating, for example, when heated to about 400°C, the glaze with a melting point of 400°C melts and forms a glass film, and when heated to about 600°C, the glaze with a melting point of 600°C melts and forms a glass film. The interior is protected from external heat by forming a glass film with glaze at ℃.

For this reason, this sealing material has a very large effect of protecting the interior from external high-temperature heat, and when heated due to a fire, etc., the glaze forms a glass layer within the sealing material by heating and melting, preventing heat from the outside world. Since it has the function of shutting out, it is possible to provide a doorway wall structure with excellent fire resistance and heat insulation properties.

In addition, it is also preferable that not only the sealing material but also the door boundary wall itself is made of the same composition as the sealing material according to the present invention, and in that case, since the sealing material and the door boundary wall are of the same composition. The bondability between the two is very good.

(Example 1) Alumina cement 200Kg, crushed limestone 400Kg,
Raw coke (softening point approximately 430℃, fixed carbon 88.8%,
Volatile content 10.7%, ash content 0.5%) 25Kg, scaly mica 25
Kg, borax (decahydrate) 90Kg, isocyanate foam adhesive (water-soluble urethane prepolymer)
A rice cake-like product obtained by adding and mixing 250 kg of water to a powder mixture consisting of 250 kg of water was dried at room temperature for 24 hours to produce a panel with a length of 1.8 m, a width of 0.9 m, and a thickness of 40 mm.

The physical properties of this panel are as follows.

Bending strength: 22.5Kg/cm ² , Compressive strength: 28.4Kg/cm ² , Bulk specific gravity: 1.09, Sound insulation: Passed Level 1 (Equivalent to Architectural Institute of Japan, Sound Insulation Performance Standards for Buildings, Level 1 D50) ) Next, a panel with a thickness of 100 mm was manufactured as described above, and within it, as shown in Figure 6, from the front side to the back side, a position (first point) with a depth (thickness) of 15 mm and a depth of 32.5 mm was made. mm position (second point), depth 50.0mm
Flame was applied to the surface of the temperature sensors buried at the position (3rd point), 67.5 mm deep (4th point), and 85.0 mm deep (5th point). The fire resistance and heat insulation properties were measured.

The results are shown in FIG. In the figure, line 1 is the time-temperature curve at the first point, line 2 at the second point, line 3 at the third point, line 4 at the fourth point, line 5 at the fifth point, and line P is the panel surface. The temperature curve, line J, is the panel fire resistance test heating temperature curve specified by the Japanese Industrial Standards (JIS).

From this graph, it can be seen that even when the heated surface reaches about 1000° C., the temperature of the sealing material of the present invention at the fifth point near the opposite side hardly rises, indicating that the sealing material has excellent fire resistance and heat insulation properties.

(Example 2) Portland cement 240Kg, limestone powder 90Kg,
Raw coke (softening point approximately 430℃, fixed carbon 88.8%,
Volatile content 10.7%, Ash content 0.5%) 35Kg, scaly mica 29
Kg, borax (decahydrate) 40Kg, isocyanate foam adhesive (water-soluble urethane prepolymer) 90
Kg, _B2O3 - _PbO - _Tl2O glaze with melting point 300℃45
Kg, PbO−B ₂ O ₃ −SiO ₂ glaze with melting point 480℃ 40Kg
Add and mix 250 kg of water to a powder mixture consisting of
After leaving it for 24 hours, a panel with a length of 1.8 m, a width of 0.9 m, and a thickness of 40 mm was manufactured.

Its physical properties were as follows.

Transverse bending strength: 21.0Kg/cm ² , Compressive strength: 27.0Kg/cm ² , Umbrella specific gravity: 1.10, Sound insulation: Passed grade 1 (Equivalent to Architectural Institute of Japan, sound insulation performance standards for buildings, grade 1 D50) As described above, the sealing material of the present invention has excellent fire resistance and heat insulation properties, far exceeding JIS standard products (Japanese Industrial Standard A1304, (2-hour fire resistance)), and also has excellent bending strength. The sound insulation is sufficient and the average sound transmission loss is low in the frequency range of 125Hz to 4KHz.
It is good at about 57.4 dB (grade 1 pass) and has a low specific gravity.

It also has extremely high chemical resistance, water resistance, and airtightness.

(Effects of the Invention) As detailed above, the sealing material used in the door boundary wall construction method of the present invention has many necessary excellent physical properties.
It has chemical properties and is of higher quality and more suitable than conventional products.

In other words, since it self-foams after being filled, it automatically inserts into all the gaps between the door boundary wall, beams, and columns, becoming a porous material that completely seals and joins the door boundary wall and beams (or columns). be.

Furthermore, since it has very good adhesive properties, it has the advantage of being easy to install on-site.

Due to the effects of the various melting point glazes, scaly mica, organic foam adhesive, etc. in the sealing material, it has fire resistance (JIS 2 hour fire resistance), heat insulation ((3.0Kcal/ ^m2・h・℃), Thermal conductivity 0.03~0.035
is 0.027 for Rock wool, and 0.027 for urethane foam.
0.021, much better than ALC's 0.09), has excellent sound insulation, water resistance, flexibility, etc., does not cause cracks, and is lightweight (specific gravity 0.3 to 1.6).

Therefore, the present invention is excellent as a method for constructing partition walls for buildings and concrete houses.

In addition, the door boundary wall sealing material of the present invention has physical properties similar to those of artificial wood, and can be easily ground and polished during finishing work.

[Brief explanation of the drawing]

Fig. 1 is a sectional view for explaining the joint state of the door partition wall, beam, and column in the embodiment of the present invention and the conventional example, and Fig. 2 to 4
The figure is a longitudinal cross-sectional view of the door-boundary wall installation state of the present invention, Figure 5 is a graph of the fire resistance and heat insulation test of the door-boundary wall sealing material according to the present invention, and Figure 6 is the fire resistance of the sealing material,
This figure shows the embedded state of the temperature sensor during the insulation test. a... sealing material, b... door boundary wall, c... beam (or pillar),
1... Panel material, 2... Calcium silicate layer, 3... Tile, 4... Space, 5... Decorative board, 6... Rock wool filled decorative panel.

Claims (1)

[Claims] 1. In the construction method of door-bounding walls that fix the door-bounding walls to the building frame, as a sealing material for fixing, for 100% by weight of the total amount of a mixture consisting of 20-65% by weight of cement and 80-35% by weight of aggregate, Raw coke 4.5~14
Weight%, scaly mica 4.5~9% by weight, borax 5~
1. A method for constructing a door border wall, characterized by using a compound containing 15% by weight of a glaze, 5 to 30% by weight of a glaze, and 20 to 45% by weight of an organic foamable adhesive.