JPH06102566B2 - Filling material to prevent fire spread - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a novel fire spread filler, and more particularly to a fire spread filler for a portion of an electric wire that penetrates a fireproof compartment of a structure made of concrete walls.

[Conventional technology]

A method of filling rock wool, refractory mortar, or the like is known to prevent the spread of electric wires penetrating the fireproof compartment.

When using rock wool, fix the calcium silicate plate on one side of the wall or the floor if it matches the electric wire or rack in the opening of the compartment, and on the bottom surface, further seal it with adhesive and stuff the rock wool into the other side. Also attach a calcium silicate plate, etc.

When using refractory mortar, the same blocking plate is fixed, and after being sufficiently sealed, refractory mortar is poured or patched and filled.

Further, JP-A-62-270450 discloses a cable spread prevention fire resistant filler made of inorganic fiber, inorganic powder which is thermally decomposed and causes an endothermic reaction as a fire resistant filler, hydraulic cement, and an organic paste material.

However, with these methods, in the case of rock wool, the packing density tends to be uneven. Since the air permeability is large, it is difficult to obtain a sufficient fire spread prevention effect when the wire becomes thick.

In the case of mortar, if the shape of the seal portion is complicated, the work of sealing is difficult and there is a possibility that the filling may be incomplete in a fine gap. Further, when dried, the shrinkage is large, and the generation of cracks becomes a problem.

Further, in the case of the above-mentioned refractory filler, the workability and the heat insulation performance are not sufficient, and it cannot withstand the long-term fire resistance, so that it is not satisfactory.

[Object of the Invention]

The present invention solves the above-mentioned problems of the prior art, has good construction workability, is unlikely to cause cracks when dried, and has a large heat insulating effect in the event of a fire, thus exhibiting excellent fire resistance. The purpose is to provide a filler for use.

[Outline of Invention]

The present invention comprises 5 to 50 parts by weight of refractory fiber, 20 to 70 parts by weight of dense refractory material and lightweight refractory material, 1 to 10 parts by weight of ultrafine refractory powder, 3 to 30 parts by weight of alumina cement and 0.01 to 0 of peptizer. .
The present invention relates to a filler for preventing the spread of fire which comprises 5 parts by weight.

The present invention also includes 5 to 50 parts by weight of refractory fiber, 20 to 70 parts by weight of dense refractory material and lightweight refractory material, and 1 to 10 refractory ultrafine powder.
Parts by weight, alumina cement 3 to 30 parts by weight, peptizer 0.01 to
The present invention relates to a flame spread preventive filler comprising 0.5 parts by weight and 0.5 to 20 parts by weight of a fire-resistant expansive material.

[Action]

The filler of the present invention has good fluidity when kneaded with water by the refractory ultrafine powder and the deflocculant, and can be easily filled even in narrow gaps such as between cables, and good workability can be obtained.

Further, the refractory fiber can suppress shrinkage after drying, or crack generation and strength reduction which are likely to occur when heated to a high temperature.

In addition, among the refractory fibers and refractory materials, particularly lightweight refractory materials have good heat insulation even when heated to high temperatures, but when using refractory expansion materials, the heating surface becomes pumice stone due to foaming of the refractory expansion materials The property is further improved, and it has a high flame spread prevention ability that can withstand heating for a long time.

In the filler for preventing the spread of the electric wire according to the present invention, it is preferable that the filler can be easily dismantled to some extent when a fire is generated during use and the wiring is reconstructed. For example, it is effective that the dense refractory material can provide the necessary strength, and the lightweight refractory material or the fire-expandable material can be used to improve the heat insulation property and improve the dismantling work.

[Specific Description of the Invention]

 The present invention will be described in detail below.

The refractory fiber used in the present invention is rock wool, slag wool, alumina-silicate fiber, silica fiber, alumina fiber, zirconia fiber,
Fibers such as glass fibers, which can be used alone or in combination thereof, have heat insulating properties and prevent cracks, cracks, and chipping due to dry heating.

The content of the refractory fiber is preferably 5 to 50 parts by weight based on 100 parts by weight of the filler as a whole, and if less than 5 parts by weight, the heat insulating property is poor, and cracks, cracks, and chipping due to drying and rapid heating are likely to occur. . Also, if it exceeds 50 parts by weight, it has excellent heat insulation performance and does not cause cracks, cracks due to drying or heating,
Uniform dispersion is difficult and the fluidity during construction is poor, and the strength of the filler cannot be obtained.

Next, in the present invention, a dense and lightweight refractory material is used. As the dense refractory material, bauxite, alumina, chamotte, loach, silica sand or the like can be used. As the lightweight refractory material, perlite, fuyolite (trade name), vermiculite, or the like can be used.

By using a dense refractory material, workability at the time of construction can be obtained, and strength can be obtained in the density of the filler. Also,
By using a lightweight refractory material, heat insulation and workability during dismantling can be obtained. One or more of the refractory materials can be used depending on the degree of workability, heat insulation, strength, workability at the time of dismantling and the like required for the fire spread filler.

The addition amount of the refractory material is preferably 20 to 70 parts by weight, and if it is less than 20 parts by weight, workability at the time of construction cannot be obtained, and the strength of the filler cannot be obtained, and cracks and cracks are likely to occur. On the other hand, if it exceeds 70 parts by weight, the heat insulating property cannot be obtained if the dense substance is the main component, and the structural strength cannot be obtained if the lightweight component is the main component.

In the present invention, refractory ultrafine powder is used in order to disperse well inside the filler and increase the fluidity when kneading with water. The refractory ultrafine powder used in the present invention has a particle size of 10 μm or less, preferably 1 μm or less, silica flour produced as a by-product of the production of clay, kaolin, ferrosilicon and metasilicon, hydrous silicic acid, carbon black, and silica produced by a vapor phase method. 1 to 10 parts by weight of one or more of alumina, titanium oxide, and calcined alumina. When the particle size is 10 μm or more, the damping effect due to the combined use with the peptizer is small, and it becomes particularly remarkable in the ultrafine powder of 1 μm or less.
If the addition amount is less than 1 part by weight, a sufficient water reducing effect cannot be obtained, and if it exceeds 10 parts by weight, the necessary kneading water content increases and the strength of the finished structure decreases.

As the alumina cement used in the present invention to further improve the strength, trade name Alcoa CA-25, trade name electrified high alumina cement spar, trade name Sekar 25, and JI
One or more types of S1 type or two types of alumina cement can be used. The content of alumina cement is preferably 3 to 30 parts by weight, and if it is less than 3 parts by weight, the strength after drying cannot be obtained, and if it exceeds 30 parts by weight, the strength of the filler cannot be improved and the drying shrinkage becomes large. .

In the present invention, a deflocculant is used in order to disperse the refractory fiber, ultrafine powder, etc. well. As a peptizer, a formalin compound of naphthalene sulfonic acid, lignin sulfonate,
0.01 to 0.5 parts by weight of at least one kind of sodium phosphate salt is added. If the addition amount of the deflocculant is less than 0.01 part by weight, the sufficient water-dispersing effect cannot be obtained, and if it exceeds 0.5 part by weight, the optimum dispersion state cannot be obtained.

In the present invention, a fire-expandable material is used, if necessary, in order to further improve the outer heat insulating property. The fire-expandable material used in the present invention rapidly expands to pumice when heated, for example, pearlite, obsidian, pine rock, expansive flint, inorganic powder of expansive shale, or one of expansive graphite or Two
More than one species can be used. The blending amount is 0.5 to 20 parts by weight. If it is less than 0.5 parts by weight, expansion and thermal insulation cannot be obtained when heated to a high temperature, and if it exceeds 20 parts by weight, the volume expansion becomes too large and the structure is formed. The organization of is destroyed.

In addition, in order to improve the dispersibility of the refractory fiber, a polycarboxylic acid salt, naphthalene sulfonate, polyethylene oxide or the like can be added as a surfactant.

〔Example〕

As an example and a comparative example, each component was blended as shown in Table 1 below to prepare a filler, and its physical properties were measured.

In Table 1, refractory fiber, refractory material, refractory ultrafine powder (particle diameter 2 μm or less), alumina cement, peptizer, refractory expandable material, and surfactant.

The following results were obtained when the test was conducted on each example of such a formulation.

Example-1 The materials shown in Table-1 were kneaded to form a penetrating portion of an electric wire,
Heated to 1000 ° C with a propane air burner. Two minute cracks were found on the upper surface side, but no gas leakage was observed. On the other hand, in the lower part, a slight contraction was seen around the construction.

Example-2 In this example a refractory expandable material was added. A similar heating test was conducted, but no cracks were generated and no material contraction in the lower part was observed.

Example-3 This formulation is a lightweight version with increased fiber content, especially for large openings. Although the amount of water in the kneaded product tends to increase as the number of fibers increases, consideration was added so that the water content can be suppressed as much as possible by the water reducing agent and ultrafine powder. Following the procedure of Example 1, a penetrating part having a slightly larger area was formed, and a heating test was conducted by applying the penetrating part to this part. A few cracks were found on the upper surface side after the construction, but no gas leakage was observed.

Comparative Example-1 The same test was tried by adding the ultrafine powder, the deflocculant and the surfactant from the formulation of Example 1 and performing the same test, but slight cracks were observed on the upper surface after the material was applied and cured. It was When a heating test was performed, minute cracks developed on the upper surface. Also, contraction around the lower part was recognized.

Comparative Example-2 In the same manner as in Comparative Example 1, the composition shown in Table 1 was prepared by removing the ultrafine powder, the peptizer and the surfactant from the composition of Example-1, and kneading with water. It was like gathering. When simulated construction was performed and heating was performed, cracks were formed at the boundary between the portion with a large amount of fiber and the portion with a small amount of fiber, and it expanded over time, leading to some gas leakage.

〔The invention's effect〕

According to the present invention, as a material for preventing the spread of electric wire, it is possible to use a mortar-like filler that can be easily and uniformly applied, and that is lightweight and has high durability. Further, it is possible to perform uniform work even on a large opening where uneven work is likely to occur.

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Claims (2)

[Claims] 1. A refractory fiber 5 to 50 parts by weight, a dense refractory material and a lightweight refractory material 20 to 70 parts by weight, refractory ultrafine powder 1 to 10 parts by weight, alumina cement 3 to 30 parts by weight and a peptizer 0.01. ~
0.5 parts by weight of filler to prevent fire spread. 2. Refractory fiber 5 to 50 parts by weight, dense refractory material and lightweight refractory material 20 to 70 parts by weight, refractory ultrafine powder 1 to 10 parts by weight, alumina cement 3 to 30 parts by weight and peptizer 0.01 ~
Filling material for preventing fire spread consisting of 0.5 parts by weight and 0.5 to 20 parts by weight of fire-expandable material.