JPS59451A - Heat insulating structure for concrete - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat insulating structure for concrete, and particularly to a heat insulating structure for concrete suitable for maintaining the heat insulating performance of a heat insulating material installed between fast breeder reactor building concrete and a steel liner. Regarding insulation structure.

The heat insulating material and steel liner installed on the concrete surface of the fast breeder reactor building are made by pre-fabricating the heat insulating material and steel liner into a panel shape in order to simplify the construction method and shorten the construction period. The method used is to position the mold so that it faces the building concrete, and use this as a formwork to pour the building concrete into. Perlite concrete is generally used as the heat insulating material here, and since such perlite concrete is a porous material, the heat insulating material is absorbed into the concrete during the process of pouring the building concrete and before the concrete hardens. absorbs water.

For this reason, the heat insulating material layer has a problem in that its original heat insulating performance deteriorates.

In order to prevent such problems, there is a method of pre-coating the entire surface of the insulation material with a waterproof material, but since the insulation material layer and the concrete are stuck together through the coating layer, sodium When the steel liner side becomes hot during a fire and moisture is generated from the surface layer of the concrete IJ, there is a problem in that it is difficult to release this moisture to the outside through the heat insulating material layer.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, to maintain the insulation performance without the insulation material absorbing water during concrete pouring, and to prevent moisture generated on the building concrete side. An object of the present invention is to provide a heat insulating structure for concrete that can easily release water to the outside.

In order to achieve the above object, the present invention provides a plurality of holes penetrating the insulation material installed between the building concrete and the steel liner in the thickness direction, and provides insulation including the inner peripheral surface of the holes. By covering the entire surface of the material with a waterproof material and filling the pores within this waterproof material film with a porous material,
This prevents moisture from penetrating into the heat insulating material during concrete placement, and when moisture is released from the surface layer of the concrete, it can be released to the outside through the porous material. Further, the inside of the hole penetrating the insulation material in the thickness direction is filled with a porous material, and since this porous material has a low thermal conductivity, the insulation performance of the insulation material does not deteriorate.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an example of the structure of a heat insulating material used in the heat insulating structure for concrete of the present invention, and FIG. 2 is a cross-sectional view of the main part thereof. In FIG. 1, the heat insulating material 1 is formed into a plate shape,
A shallow groove 2 is provided on one side of the insulation material 1, and a plurality of holes 3 penetrating through the insulation material 1 in the thickness direction are provided at the bottom of the groove 2. The entire surface of the heat insulating material having such a shape, including the inner surface of the through hole 3, is covered with a waterproof film 4. As a method for forming a film of a waterproof substance, a method may be adopted in which a heat insulating material in which through holes 3 are formed is immersed in a solution in which a waterproof substance is dissolved. Next, after the inner circumferential surface of the hole 3 is formed with a waterproof material membrane 4, this gap is filled with a porous material 5. Filling of the porous material 5 is achieved by filling the holes 3 with pearlite concrete, lightweight concrete, or the like and solidifying the same. FIG. 2 shows the state in which the porous material 5 is filled in this manner. Figure 3 is the first
The structure of a vertical wall cell liner for a fast breeder reactor is shown using the heat insulating material 1 shown in the figure, and FIG. 4 is a cross-sectional view thereof. Third
In the figure, anchor beams 8 having studs 7 are attached to the back side of the steel liner 6 by welding at regular intervals, and a heat insulating material 1 is attached between the steel liner 6 and the anchor beam 8.
is installed so that #2 is located on the steel Lychiro side.

The gap between the heat insulating material 1 and the anchor beam 8 is filled with a sealing material 9.

In the formwork having such a configuration, when building concrete 10 is filled on the side of the heat insulating material 1 on which the grooves are not formed, the concrete 10 adheres to the entire surface of one side of the heat insulating side 1 including one side of the porous material 5. , and a gap is formed between the steel liner 6 and the heat insulating material 1 by the groove 2.

In the concrete insulation structure according to this embodiment, the waterproof material membrane 4 prevents water from penetrating into the insulation material during concrete pouring and reducing the insulation performance, and prevents sodium leakage in the cells from affecting the surface layer of the concrete. When the temperature of the concrete rises and water is released, the water released from the surface layer of the concrete permeates through the communication holes in the porous material 5, and the water between the heat insulating material 1 formed by #2 and the steel liner 6 increases. It is guided into the space between the particles and easily released to the outside.

FIG. 5 and FIG. 6 show other examples of the structure of the heat insulating material in the present invention. The structure of the heat insulating material in this example is the same as that shown in FIG. 1 except that the groove 2 shown in FIG. 1 is not formed. Therefore, in FIG. 5, the same components as in FIG. 1 are indicated by the same reference numerals.

The heat insulating material 1 according to this embodiment is also installed in the same way as the cell liner at the edge of the heat insulating material 1 in FIG. In this embodiment as well, the same effects as in the previous embodiment can be obtained when filling building concrete. Furthermore, although there is no gap between the steel liner 6 and the heat insulating material 1 due to grooves, if the steel liner becomes hot due to sodium leakage, the steel liner 6
Strictly speaking, since the coefficient of thermal expansion is different between the steel liner 6 and the heat insulating material 1, a slight gap is created between the steel liner 6 and the heat insulating material 1, so that the performance of releasing moisture generated from the concrete can also be ensured. Furthermore, this embodiment has the advantage that the heat insulating material can be manufactured more easily than the previous embodiments.

In the present invention, as the waterproof material formed on the surface of the heat insulating material 1, any material can be used as long as it has good adhesion to the heat insulating material 1 and has good heat resistance.A typical example of such a material is epoxy resin. can be mentioned. Further, the porous material is not limited to pearlite concrete or lightweight concrete, but any material having communicating pores and low thermal conductivity can be used. Furthermore, as a means for forming a waterproof material film on the surface of the heat insulating material 1, a method such as spraying may be used in addition to the dipping method.

As described above, according to the present invention, the surface of the insulation material is covered with a waterproof material, so even if it is installed before concrete is poured, the insulation material will not absorb water, thus maintaining high insulation performance. In addition, since the plurality of pores penetrating the insulation material in the thickness direction are filled with a porous material, moisture generated on one side of the insulation material can be easily removed.
can be released.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the structure of the heat insulating material in the present invention, Fig. 2 is a cross-sectional view of the main part of Fig. 1, and Fig. 3 is a heat insulating structure for concrete using the heat insulating material shown in Fig. 1. FIG. 4 is a cross-sectional view of the main part of FIG. 3; FIG. 5 is a perspective view of another example of the structure of the heat insulating material in the present invention; FIG. 6 is the main part of FIG. 5. FIG. l...insulation material, 2...M, 3...hole, 4...
waterproof material membrane, 5... porous material, 6... steel liner, 7... stud, 8... anchor beam, 9...
...Sealing material, 10...Kon-Kaya 1 Eye 3 Figure 1θ

Claims (1)

[Claims] 1. In a heat insulating structure for concrete in which a heat insulating layer is provided between a steel liner and concrete, a plurality of holes penetrating the heat insulating layer in the thickness direction are formed, and a heat insulating layer including the inner peripheral surface of the hole is formed. A heat insulating structure for concrete, characterized in that the entire surface of the material layer is covered with a waterproof material membrane, and the holes in which the waterproof material membrane is formed are filled with a porous material.