JPH0532448A - Flame-resistant coating material - Google Patents

Abstract

PURPOSE:To provide the subject material containing a heat-resistant inorganic fiber material such as ceramic wool, a filler and the non-foamed powder of vermiculite and capable of giving a heat-resistant and heat-insulating coating film at a low costs. CONSTITUTION:(A) A flame-resistant coating material used for spraying on rock wool, granular wool, etc., comprises 100 pts.wt. of a heat-resistant inorganic fiber material such as rock wool, a filler and >=25 pts.wt. of non-foamed vermiculite powder having a granule size of 40-80 mesh. (B) A flame-resistant coating material used for spraying as a cement slurry is characterized by adding >=20wt.% of the non-foamed vermiculite powder and water to the cement. The component A or B is, if necessary, sprayed to one side of a steel plate, etc., in a thickness of approximately 30mm to produce a heat-resistant coating film.

Description

Detailed Description of the Invention

[0001]

[Industrial application] Steel frames used for pillars and beams of buildings suffer from strength deterioration due to heating during a fire. Steel frames are fireproof coated to prevent buildings from collapsing due to fire.
Therefore, as the performance required for the fireproof coating material, the fireproof performance against fire and the heat insulating performance at that temperature must be satisfied. While satisfying the above-mentioned performance, more labor-saving, cheaper, and faster work is required for the fireproof coating work. Labor saving, low cost, and speeding up are the emergence of fireproof coating materials that are easy to construct, use a small amount of material (that is, have a thin fireproof coating thickness), and satisfy the required performance. In the present invention, by using unexpanded vermiculite powder, it is possible to achieve more labor saving, less cost, and more speedy operation when applying the fireproof coating material.

[0002]

BACKGROUND OF THE INVENTION Blown refractory coating materials can be classified as follows. (B) A fire-resistant coating material that is mainly composed of heat-resistant inorganic fiber material and cement, and is sprayed on the fiber material in a dry state. (B) A refractory coating material in which raw materials such as heat-resistant inorganic fibers, cement, gypsum, vermikilite, aluminum hydroxide, and other inorganic fillers and surface-active agents are mixed in advance with water and sprayed to form a slurry.

[0003]

The refractory coating material is required to exhibit fire resistance and heat insulation performance in a high temperature state caused by a fire. Therefore, the constituent elements of the fireproof coating material are a material having a high heat insulating property at a high temperature and a binder which can withstand the high temperature. In order to achieve more labor saving, lower cost, and faster work, the roles of these constituent elements have been fully elucidated, and by discovering and applying more suitable constituent materials, fire resistance that meets the required performance even with a thin coating thickness To discover the coating material.

[0004]

[Means for Solving the Problems] Water is the best material for suppressing the temperature rise in a high temperature state at the time of fire. The factors of the heat insulation performance are the properties peculiar to the material and the thickness of the heat insulation material.
Therefore, a material containing water, which expands at high temperature to improve the heat insulation performance inherent to the material, and whose thickness increases due to expansion, is ideal as a constituent material of the fireproof coating material. . Hydrous foaming ores such as vermiculite and pearlite almost satisfy the above conditions. The present invention is a fluke,
By utilizing expandable ore powder such as pearlite as a fireproof coating material, we have succeeded in inventing a fireproof coating material that can be dramatically thinner in fireproof insulation performance at high temperatures and can be applied thinner.

[0005]

Next, the experimental results of the method of practicing the present invention and its fireproof thermal insulation performance will be described with reference to examples.

Example 1 (a) The material of the present invention, 100 parts by weight of rock wool, has a grain size of 40 mesh to 8
30 parts by weight of 0-mesh unexpanded vermiculite powder is added, and rock wool granular cotton mixed with unexpanded vermiculite powder is produced using a granular cotton manufacturing machine. On the other hand, about 100 parts by weight of water is added to 40 parts by weight of cement to prepare a cement slurry. These are sprayed by a conventional rock wool fireproof coating spraying machine to one side of a 1-meter square iron plate so as to have a thickness of 30 mm, and one side of the iron plate is coated with the fireproof coating material of the present invention. (B) Conventional material Using a rock wool fireproof coating material that has been used for a long time, it is sprayed with the same spraying machine as (a) onto one side of an iron plate of the same standard as described above so as to have a thickness of 30 mm. Is coated on one side with a conventional refractory coating material. (A), (b)
After co-drying, a heat and fire resistance test was conducted. As can be seen from the above test results, in the fire resistant coating material of the present invention, (1) evaporation of crystal water of unfoamed vermiculite occurred in the course of the heating and fire resistance test, which prevented an increase in internal temperature. (2) The fire-resistant coating material of the present invention expanded due to the foaming of unexpanded vermiculite, and the coating thickness increased by about 20%. Due to these effects, the increase in the temperature of the iron plate was reduced by about 30%, which proved that the fireproof coating material of the present invention was excellent in the fireproof heat insulating performance.

Second Example In the same spraying operation as the conventional method of spraying heat-resistant inorganic fibers in a dry state, in the step of defibrating rock wool granular cotton, 40 mesh is added to 100 parts by weight of rock wool granular cotton. About 100 parts by weight of unexpanded vermiculite powder of 100 mesh size is added and added, and ordinary cement slurry is used as a binder to form a 30 mm thickness on one side of an iron plate of the same standard as the first example. Was spray coated with the fire resistant coating material of the present invention. After the fire resistant coating material was naturally dried, a heat fire resistance test was performed. Similar to the results of the first example, the above test results also proved that the fireproof coating material of the present invention was excellent in fireproof heat insulation performance.

[0008]

As will be apparent from the work and the examples, the fire-resistant coating material of the present invention, as compared with the conventional fire-resistant coating material,
It shows that even if the work is applied with a thickness of 20% to 30% less, the fireproof insulation performance for protecting the steel frame can be guaranteed. That is, it means that the amount of the fireproof coating material can be reduced by 20 to 30%, the raw material cost, the number of spraying steps, the number of construction days, etc. are reduced, and the economic effect is proved to be very large.

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Claims (3)

[Claims] 1. A fire-resistant coating material comprising a heat-resistant inorganic fiber material such as ceramic wool and rock wool and a filler material and unexpanded vermiculite powder. 2. A fireproof coating material comprising heat-resistant inorganic fibers as a main raw material, wherein 5% by weight or more of unexpanded vermiculite powder is mixed with the inorganic fiber material in a spraying step, and the spray coating is carried out. material 3. A fireproof coating material comprising heat-resistant inorganic fibers as a main raw material, which is applied by spraying a cement slurry containing 20% by weight or more of unexpanded vermiculite powder to cement.