JPS6217054B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for applying fireproof coating to a steel structure.

There are two methods for applying fireproof coatings to steel structures: one is to spray mortar mixed with noncombustible fibers such as rock wool, and the other is to install fireproof coatings made of precast concrete around the steel frames.

The former method not only requires a spraying machine, but also requires skill in mixing mortar on site and spraying uniformly, and has the disadvantage that construction is time-consuming.

In the latter case, since the fireproof covering material is hard and has a constant shape, it is bulky and heavy, making it inconvenient to transport to and within the site.

The present invention provides a novel means that can solve both of these drawbacks at once.

That is, the method for installing a fireproof coating on a steel structure according to the present invention involves using a flexible fireproof coating mat made of noncombustible fibers in the form of felt of a required thickness and carrying cement dispersed therein, and soaking it in water. It is characterized in that it is attached to the surface of a steel structure in a state in which the cement hardens to form a fireproof coating layer with a uniform shape.

EMBODIMENT OF THE INVENTION Hereinafter, the embodiment of the fireproof coating construction method of the steel frame structure based on this invention is demonstrated based on drawing.

A flexible fireproof covering mat made by interlacing non-combustible fibers such as rock wool and glass wool and adding a binder such as a thermosetting resin to form a felt of a desired thickness, and carrying cement dispersed therein. is produced in a factory and transported to the construction site.
As a means for dispersing and supporting cement on the nonflammable felt fibers, for example, spraying an adhesive on both sides of the felt fiber group,
After thoroughly penetrating the inside, cement is attached to both sides of the felt fiber group, and with a large amount of cement placed on one side of the felt fiber group, vibration is applied to the felt fiber group. Alternatively, a method can be adopted in which the cement is spread inside the felt fiber group and the excess cement is sieved off.

Pine 1 obtained by this method is
As shown in the figure, the cement 3 is uniformly dispersed and carried over the entire wall thickness of the felt fiber group 2. Alternatively, the adhesive may be applied only to one side of the felt fiber group 2 to form a layer in which cement 3 is dispersed and supported on one side, as shown in FIG.

In addition, in either method, it is possible to support not only cement but also a mixture of cement and fine aggregate such as perlite.

The pine 1 carried to the site is uniformly sprinkled with water using a shower head, or the entire pine 1 is soaked in water, and the pine 1 soaked in water is attached to the surface of the steel structure.

In this case, since the mat 1 is flexible and deforms freely, the steel frame 4 of the H-shaped column or beam as shown in FIG. 4, the brace 5 as shown in FIG. 5, and the steel plate 6 as shown in FIG. Etc., the mat 1 can be deformed in accordance with the surface shape of the target steel structure and attached in a close contact state.

In this state, as the cement hardens, it becomes a fireproof coating layer that maintains a constant shape, that is, a shape that has been deformed to match the surface shape of the steel structure.
Since it is integrated with the steel structure due to the adhesive force between the cement and the steel structure, there is no need to attach it with bolts, nuts, adhesive-mixed mortar, etc.

Incidentally, it is also possible to carry out the method by sprinkling water while the mat 1 is attached to the surface of the steel structure so that the mat 1 is soaked with water.

The present invention has the above-mentioned configuration, and the fireproof covering mat is flexible and deformable, and is relatively lightweight until it is soaked with water, so it is easy to transport to the site and carry it small at the site. It's easy. Moreover,
Construction can be carried out easily and quickly by simply soaking the pine with water by sprinkling water and attaching it to the steel structure, and spraying machines or the like are not required.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a perspective view of a mat for fireproof coating, FIG. 2 is a schematic sectional view, and FIG.
6 to 6 are perspective views of essential parts for explaining the construction procedure, and FIG. 7 is a schematic sectional view showing another embodiment of the present invention. 1... Pine for fireproof coating, 2... Felt-like fiber group, 3... Cement.

Claims (1)

[Claims] 1. A flexible fireproof covering mat made of non-combustible fibers in the form of felt with a required thickness and cement dispersed thereon is attached to the surface of a steel structure while moistened with water. By hardening,
A method for constructing a fireproof coating for a steel frame structure, characterized by forming a fireproof coating layer with a constant shape.