JPS60129252A - Baked cement product, in hollow section thereof vitreous foam is fusion-bonded - Google Patents

Abstract

(57) [Summary] 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 fired cement product in which a vitreous foam is fused into the hollow part of a cement molded body that covers the inside.

Conventionally, when a cement molded body having a hollow portion of kW cannot be used as a heat insulating material, it has not been able to sufficiently achieve its purpose due to the convection phenomenon of air within the hollow portion. Therefore, in order to prevent air convection within the hollow part of the cement molded body, rock wool 3 is stuffed into the hollow part 2 of the conventional cement molded body 1, as shown in FIGS. 1 and 2. As is well known, rock wool is used as a heat insulating material, a sound absorbing material, and a fireproofing material. Therefore, by filling the hollow part 2 of the cement molded body 1 with the rock wool 3, the cement molded body 1 increases the effects of heat resistance, heat insulation, sound absorption, etc. without causing any air convection phenomenon in the hollow part 81sz. My heart was being taken care of. However, the conventional cement molded body 1 filled with rock wool 3 has no problem when used lying down as shown in Fig. 1, but it can be used upright as shown in Fig. 2. This eliminates the tendency for the rock wool 3 packed in the hollow portion 2 to gradually move downward. In addition, the rocks, Il, and IK, have moisture absorption properties, and as a result, they absorb moisture and become heavy, further promoting the downward migration tendency and creating a gap in the upper part of the hollow part 2. This caused a situation in which the effects of heat resistance, heat insulation, etc. that rice must have were reduced. In addition, conventionally, cement) U-shaped body 1
There was also one in which the hollow part was filled with 2Vc organic foam, but this could not provide the necessary insulation properties.

The present invention was created in view of the above-mentioned problems, and an object of the present invention is to provide a fired cement product that has excellent heat resistance, heat insulation properties, and sound absorption properties.

The gist of the present invention is to inject a foamable mixture comprising a molten substance such as glass powder or water glass and a gas releasing substance such as dolomite or Sin' (silicon carbide) into the hollow part of a cement 14 shape having a hollow metal. The vitreous foam obtained by firing and foaming is now available.

The detailed TLC of the present invention #4 will be explained below based on the drawings showing the embodiments thereof.

Cement molded body 4H1o having a hollow part 5 shown in FIG.
, p, c (ordinary portland cement) is 100 (
(parts by weight), magnetic chamotte 150 (parts by weight), M
c (This is an extrusion molded mixture of 2.5 (weight) of methylcellulose, 10 (parts by weight) of asbestos, and 35 (parts by weight) of water. In the figure, the wall thickness of the food product 4 and the dimensions of the hollow portion 5 are as shown in the figure.

Of course, this dimension is not limiting. In the hollow part 5 of the cement molded body 4, there is glass powder 93 as a molten substance.
．． 5 (wt%) and dolomite as a gas releasing substance at a mixing ratio of 6.5 (wt%), the foamable mixture 6 was uniformly poured along the wide inner wall surface of the hollow part 5. The amount of foamable mixture 6 to be put into the hollow part 5 is as follows:
It is appropriate that the space between the upper and lower sides of the hollow part 5 is 2~&. Therefore, the foamable mixture 6 is placed in the hollow part 5 to the extent that the foamable mixture 6 has a uniform thickness of 1 to 1.5 (cm) relative to the thickness 3 (cm) of the hollow part 5. When trying to obtain a glazed cement product with a glazed surface, the surface of the cement molded body 40 is glazed. However, if you are trying to obtain a simple cement product rather than a glazed cement product, there is no need to glaze the surface of the cement molded body 4.
The cement molded body 4 is fired at 850 ('C) for 20 minutes. At this time, the glass powder in the foamable mixture melts, and the dolomite becomes CO2 (
Carbon dioxide) gas is released and a bubbling phenomenon occurs within the molten glass. The cement molded body 4 was immersed in water for 5 minutes after baking U, and after 7'j, 70 (''C), 100e@R,H
Steam-cured for 3 days in Aigari wet room. In the hollow part 5 of the cement 14 shaped body 4' which has been fired or steam cured, a glassy foam 7 obtained by the foaming phenomenon is fused to the entire inner surface as shown in FIG. In addition, the temperature when firing the cement molded body 4 is 650 to 950 ('C).
If the range is 0.00, then dolomite is 00. (carbon dioxide) gas is released and the foamable mixture expands. Furthermore, although the strength of the cement compact 4 is temporarily degraded by the firing, the strength is recovered by subsequent steam curing.

The components of the foam that is fused to the hollow part of the cement molded body are:
In addition to glass powder, water glass, whitebait, etc.6 can be used as molten substances.
Any material that melts in the range of 50 to 950 ('C) is suitable. In addition to dolomite, 810 (
Silicon carbide), carbon, water glass (e.g. soda water glass), etc., which sips gas in the range of 650 to 950 ('C) are fine.0And the mixing ratio of the molten substance and the gas releasing substance is However, usually, foams are It is advisable to determine the mixing ratio of the molten material and the gas-releasing material so that a foaming ratio of 2 to 3 times can be obtained so that the foam can be appropriately fused to the inner surface of the hollow part of the cement molded body.

As explained in detail above, according to the present invention #1] K, the foam is fused to the inner surface of the hollow part of the cement molded body, and since the foam is glassy, it does not absorb moisture. Even if the foam were to fall downward, there would be no convection of air in the hollow part of the cement molding. Therefore, due to the air bubbles in the foam, it is possible to obtain a cement molded body having excellent heat resistance, heat insulation properties, and sound absorption properties.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a conventional example, Fig. 2 is a cross-sectional perspective view showing a conventional example, Fig. 3 is a perspective view showing a cement molded body used in an embodiment of the present invention, and Fig. 4 is a foamed lJ. ? ] Fig. 5 is a perspective view showing the embodiment of the present invention in a vc, and Fig. 5 is a front view (snow surface view) showing the embodiment of the present invention after foaming. ...Foamable mixture 7...Foam watch applicant Ina Seito Co., Ltd. Agent Patent attorney Satoshi Uchida Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A foaming mixture made of a molten substance such as glass powder or water glass and a gas emitting material such as dolomite or SiO (silicon carbide) is fired and foamed in the hollow part of a cement molded product having a hollow part. A fired cement product in which a vitreous foam is fused in a hollow part.