JPH0440499B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fire protection construction method for wall or floor penetrations.

In various constructions such as buildings and Plato,
Despite the presence of bulkheads, electric wires, cable water pipes, gas pipes, etc. pass through the bulkheads, so in the event of a fire, the fire can spread through the holes, often resulting in serious injury.

Various proposals have been made for fire-proofing the penetrating portion; for example, in addition to mortar treatment, putty-like fireproof sealing materials are currently widely used.

However, in cases such as large penetration areas,
It is inefficient to fill a large amount of putty-like sealing material, and it is not easy to disassemble when new piping is to be installed.

Based on the above, an object of the present invention is to provide a method for fireproofing penetrations that allows easy filling and dismantling work, has excellent fire resistance, and is substantially smokeless and harmful.

That is, the present invention makes a seal bag by tying a non-combustible material mainly consisting of ceramic chopped fiber, vermiculite, and frit that completely melts below the temperature of a general fire into a bag made of inorganic material, and then attaching this seal bag to a wall or This is characterized by filling the floor penetrating portion.

Ceramic chopped fiber is the main component of non-combustible material, and is a cotton-like material with excellent fire resistance and heat insulation properties.

For example, it is manufactured by adding a small amount of flux to alumina and silica, melting the mixture in an electric furnace, and then draining the mixture to form fibers.

Vermiculite expands in volume at high temperatures, blocking the flow of hot air and preventing temperature increases due to its endothermic effect when crystal water vaporizes.

Since frit melts below the general fire temperature (approximately 1000℃), it functions as a bonding agent to bond ceramic hopped fibers or ceramic hopped fibers to vermiculite, etc., and prevents hot air and smoke. The effect of preventing penetration can be further enhanced. A frit with a melting point of 300°C or higher is suitable.
Since these components are uniformly dispersed, there is no problem even if a small amount of organic material is used as an adhesive.

Noncombustible materials, mainly consisting of ceramic chopped fibers, vermiculite, and frit, are packed into inorganic bags to make sealed bags, which are then filled into wall or floor penetrations for fire protection.

Glass loss is suitable for the bag, and by using it, a sealed bag that has excellent fire resistance and does not generate harmful gases can be obtained. The size of the seal bag can be changed arbitrarily, but a seal bag of approximately 40 cm x 20 cm x 4 cm is suitable in consideration of the filling work in the penetrating part.

Since the non-combustible material is made in bags, it is easy to fill the penetrating portions, and is easy to disassemble, allowing for reuse even after disassembly.

Examples of the present invention will be described below.

Example 1 Ceramic steeped fiber (Nippon Isolite Kogyo ``Cao Wool Bulk (trade name)'' 500g
After spraying 20g of silicone oil on the
Evenly mix 80g and 300g of fritto (“phosphate fritto” made by Nippon Enamel Glaze), and add 900g of this mixture.
Packed in glass cloth and sealed, size 38cm x 19
A sticker bag measuring cm x 4 cm was made.

Next, as shown in Figure 1, a 100cm x 100cm through hole 2 was made in a 15cm thick concrete wall 1.
Fill 110 seal bags 3 obtained above,
4 mesh wire mesh 4 to support the seal bag 3
has been established.

This penetration part was installed in a fire resistance test furnace, and JISA1304
As a result of heating for 3 hours according to the heating curve specified in (Fire resistance test method for building structural parts), the temperature of the sealed bag on the non-fire side was 94°C.

Example 2 As shown in Figure 2, a 50 cm x 50 cm through hole 2 was provided in a 15 cm thick concrete wall 1, filled with 25 seal bags 3 similar to those in Example 1, and a cable 5 passed through the center. Ta.

In addition, a four-mesh wire mesh 4 is provided to support the seal bag 3, and a cable 5 and the seal bag 3 are
The microscopic voids were filled with a commercially available putty-like fireproof sealant.

As a result of heating for 2 hours under the same conditions as Example 1,
No cracks occurred in the penetration parts, and no spread of fire was observed in the cables.

Example 3 The same penetration as in Example 2 was made, except that a 2.5 cm thick calcium silicate plate was used instead of the wire mesh to support the seal bag.

As a result of heating for 2 hours under the same conditions as Example 1,
No cracks occurred at the penetrations, and no spread of fire was observed in the cables.

Example 4 As shown in Fig. 3, a 50 cm x 50 cm through hole 2 is provided in a concrete wall 1 with a thickness of 15 cm, and 20 seal bags 3, which are the same as in Example 1, are filled, and a hole with a diameter of
A 10 cm iron conduit 7 was passed through it. Then, ten cables 5 were passed through the conduit 7, and the spaces between the cables 5 in the conduit 7 were filled with a room temperature curing fireproof sealing material. Further, an iron plate 6 was used to support the seal bag 3.

As a result of heating for 2 hours under the same conditions as Example 1,
No cracks occurred at the penetrations, and no spread of fire was observed in the cables.

As explained above, according to the present invention, a penetrating portion that has extremely high fire resistance, is substantially harmless, and has excellent workability can be obtained.

Furthermore, it has excellent disassembly properties, and the same material can be used many times for temporary filling of penetrations during construction, making it economically advantageous.

In the fire prevention method of the present invention, conventional fire prevention techniques such as a putty fireproof sealing material, a fireproof sealing material for casting, a fireproof paint, etc. may be used in combination with the seal bag.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of Example 1, FIG. 2 is an explanatory diagram of Examples 2 and 3, and FIG. 3 is an explanatory diagram of Example 4. 1... Concrete wall, 2... Through hole, 3...
Seal bug.

Claims (1)

[Claims] 1 A seal bag is made by filling a bag made of inorganic material with non-combustible materials mainly consisting of ceramic chopped fiber, vermiculite, and frit that melts below the temperature of a general fire, and this seal bag is installed in a wall or floor penetration. A fire prevention construction method for walls or floor penetrations characterized by fire prevention treatment.