JPS5830460B2 - Insulating wall construction method for concrete buildings - Google Patents

Description

[Detailed Description of the Invention] The present invention is an insulating wall construction method for preventing dew condensation from forming on indoor wall surfaces due to temperature differences in the outside air when constructing the interior and exterior walls of concrete structures such as hotels, condominiums, and other general buildings. This method involves gluing small flat insulation pieces at regular intervals to the interior and exterior walls of the interior and exterior walls after concrete has been poured and hardened, and then adhering the interior base material to the insulation pieces using plaster bond. A suitable number of small circular injection holes are drilled in the later interior base material, and semi-fluid urea resin foam is injected and filled into the gap created between the injection holes and the concrete wall surface, hardened and insulated. This article relates to a method of constructing heat insulating walls in concrete buildings that achieves this effect.

In recent years, with the onset of the oil crisis, various types of insulation materials have been attached to the indoor walls of the exterior walls of concrete buildings to block the direct conduction of the temperature difference in the outside air to the buildings, thereby preventing dew condensation on the indoor walls. In addition to preventing the occurrence of air conditioning, the walls absorb the thermal energy of indoor air conditioning and heating to prevent a decrease in efficiency. However, condensation occurs not only in winter when the outside temperature is low,
In the summer, especially during the rainy season, hot and humid outdoor air enters the room,
Condensation forms when you touch cold wall surfaces such as behind chests of drawers, inside closets or corners, and in basement warehouses.
When condensation forms on the walls, it not only stains the interior walls, but also accelerates the damage and decay of the walls, and also damages the clothing and food stored inside the room, significantly impairing the livability of the room. be.

For this reason, the conventional insulation wall construction method involves correcting the unevenness that occurs on the indoor and outdoor walls after concrete is poured and hardened, and applying a certain thickness of mortar to create a vertical wall surface to create a smooth surface. Alternatively, after preparing the base by pasting non-woven fabric on the indoor wall, apply a petrochemical insulation material such as standard urethane foam board or styrene foam board to a certain thickness over the entire wall surface. After bonding, an interior base material is attached to the surface of the material, but with this method, it is extremely difficult to bond a solid plate-shaped heat insulating material to the entire wall without any gaps. In particular, heat shrinkage creates gaps at the connection between the wall and the ceiling, and at the four corners of the wall, resulting in a significant drop in insulation performance.In addition, the work procedure is complicated and the cost is high. This is the result.

Furthermore, since these insulation materials are petrochemical products, they are highly flammable and self-combustible in the event of a fire, and their heat and toxicity are extremely high, so there is almost no way to extinguish the fire.

Another construction method is to build up gypsum bond at regular intervals on the indoor wall surface after concrete has been poured and hardened, and then glue the interior base material vertically to the wall to form the wall. However, according to this, there is a space between the concrete inner wall and the interior base material, so when the air between them changes according to the temperature of the outside air, the plaster bond that connects the two becomes a cold bridge. However, since it causes dew condensation, the insulation effect is negligible.

The present invention involves strongly adhering the concrete wall and the interior base material by using small pieces of insulation pieces and plaster bond at regular intervals, and using the insulation pieces to form a cold bridge at the bonded area. In addition to preventing this, urea resin foam is poured into the gap between the interior base material and the concrete wall through small holes drilled at appropriate intervals in the interior base material, and is foamed on-site to cover the entire surface of the gap. Since it is injected and filled, insulation and airtightness can be easily achieved without creating any gaps.
After the foam dries and hardens, it is bonded to concrete wall interior underlayment buttons, insulation pieces, etc. to form an integral wall that prevents air convection, and even in the event of a fire, the urea resin foam is self-sustaining. It has fire-extinguishing and flame-retardant properties, generates little smoke, and has extremely low thermal conductivity, making it an excellent insulating wall.

To explain this with an example, an acrylic non-woven fabric is coated on one side of the indoor wall surface 2 of the inner and outer walls 1 of a concrete building.
Alternatively, when gluing flat small pieces of insulation pieces 4 to which adhesive material 3 such as asbestos cloth is pasted, the side of the insulation pieces 4 to which adhesive material 3 is not pasted is sealed with adhesive. After adhering to the inner wall surface 2 and applying appropriate amount of plaster bond 5 on each of the three surfaces of the adhesive material of the heat insulation piece 4, interior base material 6 is sequentially pasted on these plaster bonds 5, and the interior is finished. Adjust the adhesion part of the plaster bond 5 by appropriately pressing it so that the base material 6 forms a vertical inner wall surface 7, and when the plaster bond 5 hardens and adheres the interior base material 6, the interior base material 6 A suitable number of small circular injection holes 8 are bored at regular intervals, and semi-fluid urea resin foam 3 is formed between the wall surface 2 and the interior base material 6 by in-situ foaming through the injection holes 8. In the figure, 11 is an injection hose, 12 is a floor, and 13 is a closed pore material.

The present invention is constructed using a diagonal construction method. The material 3 is pasted and cut into small pieces, and the indoor wall surface 2 to which this is pasted is
In this method, the side of the heat insulating piece 4 that is not covered with the adhesive 3 is directly bonded to the concrete surface of , after the formwork has been removed after the concrete has been poured and hardened, and the other side is bonded with the plaster bond 5. The adhesive material 3 is attached using acrylic non-woven fabric or asbestos cloth in order to improve the adhesive force and provide stability during adhesion.

When adhering the insulation pieces 4 to the indoor wall surface 2 at regular intervals, if they are adhered at regular intervals to the ceiling buttons and floor surfaces that touch the top and bottom of the wall surface 2, the urea resin foam 9 injected between them will fill the gaps. Since it can be filled without any defects, it becomes a heat insulating wall without any defects.

In addition, the plaster bond 5 that is raised on the surface of the adhesive 3 is raised in an appropriate amount so that the interior base material 6 to be adhered thereto becomes a vertical inner wall surface 7, so that some unevenness may occur on the interior wall surface 2. Even if the adhesive part of the interior base material 60 and the plaster bond 5 is properly pressed and adjusted, a vertical inner wall surface 7 can be easily obtained.

After adhering the interior base material 6 to the entire surface of the indoor wall surface 2 in this manner, an appropriate number of small circular injection holes 8 are bored at appropriate locations on the interior base material 6 at regular intervals, and the injection holes 3 By injecting the semi-fluid urea resin foam 9 by foaming on-site, the urea resin foam 9 can be easily formed without any gaps in the gap 10 that is created between the indoor wall surface 2 and the interior base material 6. After the urea resin foam 9 is dried and hardened, the indoor wall surface 2, the interior base material 6, the heat insulation piece 4, and the gypsum board 5 are attached to each other and integrated. It becomes a heat insulating wall and the injection hole 8
If a closed pore material 13 such as cheesecloth or synthetic resin film is attached and a beautiful facing material is attached to the surface of the interior base material 60, a heat insulating wall with unprecedented excellent heat insulating power can be created. be.

In this way, the present invention eliminates the need for ground preparation when constructing not only concrete walls but also external walls and partitions such as cement walls and metal walls that are directly affected by the temperature and temperature of the outside air, making the work simple. It can be constructed according to a procedure, and when making the 9 layers of urea resin foam thicker in cold regions etc., a thicker wall can be obtained by making the insulation piece 4 thicker. Since the urea resin foam 9 is made by foaming foaming liquid and resin liquid at the construction site using compressed air and injecting the foamed liquid into the gap 10 through the injection hose 11, there is no gap in any complicated gap. After entering the wall and drying, it becomes an integrated heat-insulating wall with no heat shrinkage, exhibiting excellent heat insulation and soundproofing properties, making it inexpensive not only for new concrete buildings but also for extensions and renovations. It can be easily constructed.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the construction order of the present invention, where part A is when the insulation piece is bonded, part B is just before the plaster bond is raised and the interior base material is pasted, and part 0 is when the construction is completed. This shows that. Figure 2 is a partially enlarged cross-sectional view immediately before the interior base material is attached, Figure 3 is a partially enlarged cross-sectional view when the urea resin foam is injected, and Figure 4 is a partially enlarged cross-sectional view when the interior base material is pasted. FIG. 5 is a partially cutaway sectional view of the heat insulating wall, FIG. 6 is a sectional view of the interior base material bonded part, and FIG. 7 is a slanted view of the heat insulating piece. FIG. 8 shows an embodiment of the present invention. In the figure, 1... External wall, 2... Indoor wall surface, 3... Tough adhesive 4... Insulation piece 5... Plaster bond, 6...
・Interior base material, 7...Inner wall surface, 8...Injection hole, 9.
...Urea resin multifoam, 10...Gap.

Claims (1)

[Claims] 1. When gluing flat, small pieces of insulation pieces with elasticity material of acrylic non-woven fabric or asbestos cloth affixed on one side to the interior and exterior walls of concrete buildings at regular intervals, the insulation pieces will have elasticity. Glue the side that is not covered with adhesive to the indoor wall surface with adhesive, apply an appropriate amount of gypsum bond on each side of the remaining adhesive material of the insulation piece, and then apply interior base material on top of these gypsum bonds. Glue them one by one, press and adjust the attached part of the plaster bond appropriately so that the interior base material becomes a vertical inner wall surface, and when the plaster bond hardens and the interior base material adheres to the insulation piece. , small circular injection holes are drilled at appropriate intervals in the interior base material, and semi-fluid urea resin foam is poured from each injection hole onto the interior wall surface by foaming in situ.
A method of constructing insulation walls for concrete buildings by injecting and filling the gap between the interior base material and the interior base material.