JPS61169205A - Manufacture of light-weight aerated concrete panel with through-hole - 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 "Field of Industrial Application" The present invention relates to a method of manufacturing a lightweight cellular concrete panel having through holes in the surface direction of the panel that provide space for wiring or piping.

"Conventional technology" Lightweight aerated concrete panels used in panel construction method c
In order to form concrete panels (hereinafter referred to as concrete panels) by factory production, a considerable amount of foam is added to the concrete slurry (fluid mixture), and this is poured around a framework provided in a forming form, covering the framework. It is known to carry out a method in which the material is subjected to secondary curing, and after being demolded, it is pressurized and heated in an autoclave and then subjected to steam curing.

By the way, in a house constructed using the above-mentioned concrete panels, when it becomes necessary to install electrical wiring or various pipes on the walls, conventionally, the internal space of the steel frame to which the concrete panels are attached is used. This was done by means such as using .

This means that inside the concrete panel, along the width direction of the concrete panel, or along the surface direction such as the vertical direction,
This is because it is difficult to form long holes for electrical wiring or piping. The reason for this is that since the tm depth is provided inside the concrete panel, this framework becomes a nuisance for hole formation, and cutting one long hole may cause cracks in the concrete panel. Further, it is difficult to form through holes oriented in a required direction to match the orientation of wiring and piping by cutting from the outside of the concrete panel.

Therefore, conventionally, in houses using concrete panels of this type, wiring and piping could not be installed directly inside the concrete, which caused the problem of restrictions on the formation positions of outlet boxes and gas pipe outlets. there were.

In addition, when forming the concrete panel and pouring the aerated concrete slurry into the molding form, it is possible to expose the ends in advance and install wiring and piping, but it is possible to Because the position is unspecified, there are many unevenness in fitting to factory-produced panels, and there is also the problem that wiring and piping parts may be damaged by steam curing under high temperature and pressure in autoclaves. It's not practical.

``Object of the Invention J The present invention has been made in view of the above-mentioned circumstances, and it is possible to simultaneously form a through hole in the concrete panel in the surface direction VCG of the concrete panel at the time of panel molding. The purpose of the present invention is to provide a method for obtaining concrete panels that enable wiring and piping.

"Means for Solving the Problems" The present invention provides a flexible rod having approximately the same diameter as the diameter of a through hole necessary for wiring, piping, etc. The panel base is formed by pouring aerated concrete slurry, and the rods are pulled out to form through holes before or after curing in an autoclave.

``Function'' By inserting a flexible rod and pouring concrete slurry, it becomes possible to form holes of any shape, and the flexible rod makes it easy to pull out.O ``Implementation'' Example” Figures 1 to 4 show an embodiment of the present invention.
1 in FIG. 1 shows a box-shaped molding frame with an open top surface, and the molding space S in this molding frame 1 is filled with anti-rust treated @ Angle members 2a and steel reinforcing bars 2b are arranged to have the same thickness as the structure (flat foam concrete panel) P, while the frame 2 has a pair of lattice-structured reinforcing bars 2b facing each other. and reinforcing bar 2b
The ends of the concrete panel PKm are connected to each other to form a flat rectangular parallelepiped shape, and this frame 2 is installed on the concrete panel PKm to reinforce the concrete panel P.

To manufacture a concrete panel P, first set the wiring position or internal piping position of the concrete panel P in advance, and then drill the through hole T that matches that position.
In order to form this, flexible rods 3 having a rectangular or circular cross section are prepared (two rods are shown in the drawing). This rod 3 is made of a flexible material such as rubber, foamed polyethylene, foamed polystyrene, foamed polystyrene, etc., and is preferably formed of a material whose volume decreases at the steam curing temperature in an autoclave device 7, which will be described later. Its length is set to a value corresponding to the length of the through hole T, and its diameter is set to be approximately the same as the diameter of the through hole T, respectively. In addition,
A mold release agent is applied to the outer circumferential surface of the rod 3, if necessary. Then, these rods 3 are installed at the positions where the through holes T are to be formed. For this installation a, as shown in FIG. This is done by tying the reinforcing bars 2b together so that the bars 3 and 2b do not come into contact with each other. .

Note that this KIAI u material 5 is preferably made of mortar or the like, which is compatible with the concrete slurry described later. Note that the end 3a of the rod 3 is placed close to the inner surface of the mold frame 1. I'll keep it.

After the installation of the rod 3 is completed, the molding space F of the molding frame 1 is
9TSVC aerated concrete slurry (a conventionally known slurry in which a considerable amount of foam is added to a fluid mixture of cement and silica sand) is placed and allowed to stand for a predetermined number of hours. Note that by pouring the foamed concrete slurry, the rod 3'i2 is completely buried in the foamed concrete slurry. If the poured aerated concrete slurry is left to stand, it will gradually harden, but before it completely hardens, the ends 3a of the rods 3 will be exposed to the edges of the panels as shown in FIG. If the rod 3 is installed at a position close to the rod 3, holes 8 are made in the semi-hardened aerated concrete slurry around the rod 3 to expose each end 3a of the rod 3. After this operation, the aerated concrete slurry is completely hardened (second hardening) to form a panel base P, and this panel base P1 is removed from the molding form 1.

Next, the panel base P formed by performing the same operation as above
, are put together and pre-cured by the pre-curing device 6. This pre-curing device 6 is for holding the panel substrate P1 in a steam atmosphere under normal pressure.

After pre-curing for a predetermined period of time, the panel substrate P1
is carried into the autoclave device 7 and heated to a high temperature C, for example 1
The panel substrate P1 is converted into a concrete panel P by performing a steam curing treatment in which it is maintained in a steam atmosphere at high pressure (for example, 10° C.) for several hours (for example, 6 hours).

Once the steam curing process is completed, the concrete panel P
Take out the rod 3 from the autoclave device 7 and remove it from the rod 3 in the hole 8.
When the rod 3 is pulled out as shown in FIG. 4 while tearing off the threads 4, a through hole T is formed inside the concrete panel P. When pulling out the rod 3, since the rod 3 itself is melted and shrunk by heating at the steam curing temperature, the mold release effect is good and the rod 3 can be easily pulled out. In this case, it is more effective to apply a mold release agent. Note that a part of the adjustment material 5 is exposed at several places on the inner peripheral surface of the through hole T, but the adjustment material 5 is made of a material that is compatible with the aerated concrete slurry, so it is not integrated into the concrete panel P. There is. Note that if a concrete panel is formed by directly tying the rigid body 3 to the reinforcing bars 2b without using this material 5, the reinforcing bars 2b will be exposed on the inner surface of the through hole T, and the reinforcing bars 2b will be exposed. This will cause problems in terms of rust prevention. Therefore, the adjustment material 5
This prevents the reinforcing bars 2b from being exposed and ensures an appropriate cover thickness.

The through hole T formed as shown in the previous ml can be used as a space for indoor air conditioning wiring, TV wiring, etc., and CD air wiring.
Alternatively, it can be used as a space for piping such as flexible gas pipes, refrigerant distribution pipes for air-conditioning machines, or hot water pipes for central heating.

Moreover, since the rod 3 is flexible, it can be bent freely in a desired direction when tying it to the reinforcing bars 2b. Therefore, the through holes T can be formed to suit various wiring routes or piping routes.

FIG. 5 is a cross-sectional view of another example of rods 30 used in the method of the present invention, and this row of rods 30 has a core material such as wire.
It has a composite structure consisting of a core material 30a and an outer sheath 30b that covers the outer periphery of the core material 30a. The outer cover 30b is made of the same material as the material of the rod 3.

When the method of the present invention is carried out using the rod 30, in addition to achieving the same effect as the above embodiment, even when the rod 30 is pulled out, even if the pulling resistance is large, the rod 3
It has the effect of being able to pull out 0 without cutting it off in the middle.

Further, in this example, if the core moon 30a is formed into an irregular shape such as a spiral shape or a zigzag shape at a proper location, it will be better caught on the outer sheath 30b.

In addition, considering the fact that the rods 3 and 30 can be pulled out after autoclaving, as mentioned above, it is desirable that the rods shrink at the autoclave temperature, but if they are made of a wear-resistant material such as silicone rubber, the template material may not necessarily be used. There is no need to use it. In addition, for any of the above-mentioned tables, the pulling out of the 1-piece bodies 3 and 30 is done after autoclaving, but if it has excellent 1lil# formability and is convenient for the panel manufacturing process, it may be done before autoclaving. This Kawai can also accomplish the initial purpose.

Furthermore, the shape of the adjusting member 5 may be f:t, for example, a block shape, as long as it allows direct contact between the rods 3, 30 and the reinforcing bars 2b.

"Effects of the Invention" As explained above, the present invention provides a flexible rod having a diameter approximately the same as the diameter of the required through hole, and inserts this rod into a framework within the molding frame. Place the concrete in a fixed position with support, and then pour aerated concrete slurry into the molding form.
This is hardened to form the panel base, and then the rods are pulled out to form the through holes before or after steam is generated at a controlled temperature and pressure in an autoclave. It is possible to form a long hole along the Therefore, according to the method of the present invention, it is possible to obtain a concrete panel having a through hole for wiring or piping inside, and the effect of enabling wiring or piping inside the concrete panel is diminished. Further, since the rod has the ability to pass through, it is easy to pull out the through hole, and there is an advantage that the through hole can be easily formed to match the routing route of wiring and piping.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention,
Figure 1 is a schematic diagram showing the manufacturing process of concrete panels.
Y view, Figure 2 is a sectional view of the panel base, Figure 3 is a plan view showing how the rod is attached to the frame, Figure 4 is a sectional view showing the rod being pulled out, and Figure 5 is a sectional view of the panel base. The figure is a cross-sectional view showing the usage state of an example of a curved rod body. 1...Molding formwork, S...Molding space, 2
...Frame, P...Light soft foam concrete panel (concrete panel), Pl...
・Nokunel base, 3..., rod, 7...
・Autoclave device, T...through hole, 30...
...Stand. Procedural Amendment (Jigen Showa Month/Date 1, Case Description Showa 60 Patent Application No. 10530 2, Title of Invention Method for Manufacturing Light-weight Aerated Concrete Panels with Perforations 3)
, Person making the amendment Patent H5 applicant Misawa Homes Co., Ltd. 4, "Detailed description of the invention" column of the agent's specification. 6. Correction details +11 Correct "unevenness" to "waste" Kd on page 9, line 9. (2) Delete "Release material" on page 11, line 7. (3) No. 1/G line, "use" is corrected to "shrinkage". (4) In the 1st/Sada lines 1 and 2, correct "initial" to "intended".

Claims (3)

[Claims] (1) Placing a frame in a molding cavity within a molding frame, covering the framework in the molding cavity, pouring aerated concrete slurry and hardening it to form a panel base within the molding frame; , a method for manufacturing a lightweight cellular concrete panel in which the panel base is demolded from the molding form and steam-cured at high temperature and pressure in an autoclave, the panel having a diameter substantially the same as that of the required through hole, and forming a concrete panel. A flexible rod with good mold releasability is prepared, the rod is supported by the framework and placed in the molding cavity before the foamed concrete slurry is poured, and then the foamed concrete slurry is poured. 1. A method for producing a lightweight cellular concrete panel having through-holes, the method comprising: forming a panel base by using the same method, and then pulling out the rods before or after autoclave curing to form through-holes in the surface direction of the panel. (2) The through hole according to claim 1, wherein the rod has a composite structure consisting of a core material such as a wire and an outer cover formed to cover the outer periphery of the core material. A method for manufacturing a lightweight aerated concrete panel. (3) A method for manufacturing a lightweight cellular concrete panel having through holes as set forth in claim 1, which comprises applying a mold release agent to the outer periphery of the rod.