JPH0249881B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing lightweight cellular concrete panels, and more particularly to an improvement in the method of defining the surface of a cellular concrete slurry within formwork.

Concrete panels are generally widely used as construction materials, but the material for such concrete panels has the advantages of both concrete and wood.In other words, although it is a concrete panel, it is lightweight and has good insulation properties. In recent years, aerated concrete has been adopted in an attempt to

The following process has been proposed as a manufacturing process for such aerated concrete. First, the frame of the panel is formed by combining a number of coil materials vertically and horizontally into a wire mesh shape, and the periphery of this wire mesh-like coil material is fixed to a frame. Degrease this framework, wash it with water,
After being soaked in mortar and subjected to rust prevention treatment, it is set in a formwork, and aerated concrete slurry (fluid mixture) consisting of cement, admixtures, water, etc. is poured into this formwork and allowed to temporarily cure for a while. .

Once the temporary curing is complete, the pieces are removed from the formwork and several pieces are poured together in the pre-curing process, then placed in an autoclave (pressure steam oven) and cured at high temperature and pressure. The panels cured in an autoclave are finished with external coating, etc., and then stored as a finished product.

In the manufacturing process of such lightweight aerated concrete panels, as shown in FIG. This results in the formation of a bulge and a bulge portion 5.

Conventionally, a method has been adopted in which this raised portion 5 is scraped off using a scraper or the like. but,
This method has a disadvantage in that it generates shavings, and it is necessary to take measures to remove the shavings. In addition, the raised part 5
In some cases, depressions caused by air bubbles inside the panel appear on the surface of the panel where the panel surface has been scraped away, so the panel is not necessarily suitable as a wall surface of a building as it is. Therefore, a method for manufacturing lightweight aerated concrete panels having a panel surface that is more suitable for use as a wall surface of a building has been desired.

An object of the present invention is to create a lightweight aerated concrete panel which has a panel surface that is easy to work with and eliminates the raised part of the aerated concrete slurry in the formwork, and at the same time has a panel surface that is highly suitable for use as a wall surface of a building. To provide a manufacturing method.

In the present invention, after pouring aerated concrete slurry into a formwork, before the slurry surface loses its fluidity, granular material made of aggregate is sprinkled on the slurry surface, and then the mounds formed on the slurry surface are At the top,
A roller-shaped pressure member whose position is regulated by the formwork is brought into contact with the mold, and the roller-like pressure member presses the raised portion against the formwork to a predetermined level to define the panel surface and at the same time remove the powder and granules. The purpose is to achieve the above object by fixing the panel surface to the panel surface to further enhance the suitability of the panel surface as a wall surface of a building.

Here, as the positional regulation by the formwork, a means for regulating movement in the direction close to the panel surface can be used, for example, by bringing a roller-shaped pressure member into contact with the edge of the formwork.

Further, the predetermined level at which the raised portion is pushed may be appropriately set depending on the regulating position of the roller-shaped pressure member.

Examples of the manufacturing method according to the present invention will be described below based on the drawings.

2 to 8 show the manufacturing process of one embodiment of the present invention. In FIG. 2, a wire mesh-like coil material 2 is placed in a rectangular formwork 1. As shown in FIG. With this formwork 1 placed on a flat plate-shaped mounting table or the like, aerated concrete slurry 4 is poured into the formwork 1 from a bucket 3, as shown in FIG.

Next, the slurry 4 in the formwork 1 is cut along the upper edge of the formwork 1 to flatten the slurry surface, and then left for a while, as shown in Fig. 4 (and Fig. 1). As shown, a raised portion 5 is formed approximately in the center due to the air bubbles inside the slurry.

Next, before the fluidity of the surface of the slurry 4 is lost, as shown in FIG. Powder 7 is uniformly spread by a spreader 6 that moves in the direction indicated by a middle arrow M.

This granular material 7 is what is called aggregate, such as kansui stone or silica sand.

After uniformly dispersing the powder 7 over the entire surface of the slurry 4 (see FIG. 6), as shown in FIG. Arrow M in the figure covers the entire surface area.
Press and rotate in the direction of . With this move,
The granular material 7 is pushed into the surface of the slurry 4 and becomes fixed, but the granular material 7 prevents the slurry 4 from adhering to the circumferential surface of the roller-shaped pressure member 8.

In this way, as shown in FIG. 8, the granular material 7 is fixed to the panel surface 9 at the same time as the panel surface 9 is defined.

At this time, a touch sensor (not shown) that sends a signal when it comes into contact with the upper edge of the formwork 1 in the figure is set so that it moves vertically together with the roller-shaped pressure member 8. 7. The movement level of the roller-shaped pressure member 8 in the direction indicated by the arrow M in FIG. 7 is kept constant with respect to the upper edge of the formwork 1. Further, it is desirable that the pressure applied to the surface of the slurry 4 by the roller-shaped pressure member 8 is such that the penetration resistance value is within 10 C.PS and the light pressure distance is within 10 mm, particularly around 3 mm.

Note that, as shown in FIG. 9, the inside of the slurry 4 pressurized by the roller-shaped pressure member 8 has a high specific gravity (density) on the pressurizing surface side, and becomes continuous as it reaches the non-pressurizing surface side. The structure is such that the specific gravity decreases. Further, the powder 7 is fixed to the surface portion on the pressure side, and the surface portion is formed extremely densely.

After the panel surface 9 is defined in this way, it is cured, and if necessary, a finishing coat is applied to the exterior, and then it is stored as a product.

Next, the effects of this embodiment will be explained.

Unlike the case in which the raised portion 5 is scraped off as a means for defining the panel surface 9, there is an effect that there is no need to take any means for removing scrapings.

Furthermore, since the powder 7 is pressed and fixed to the panel surface 9 at the same time as the panel surface 9 is defined, work efficiency and productivity can be improved. Furthermore, the panel surface 9 is formed extremely smoothly, and by appropriately selecting the color etc. of the powder 7, there is no need for subsequent finishing coating, and it is suitable as a base for finishing coating. It has the effect of becoming something new.

Furthermore, since the panel surface 9 is pressed by the roller-shaped pressure member 8, and the powder 7 is also spread and fixed, the surface hardness is increased, chipping of the surface is prevented, and abrasion resistance is also improved. In addition to improving various mechanical strengths such as, the water impermeability of the surface also improves. Therefore, it is possible to provide a concrete panel that is extremely suitable for use as a wall surface of a building, regardless of whether it is used as an inner wall surface or an outer wall surface.

Moreover, as shown in FIG. 9, since the interior of the panel is kept at a low specific gravity, the inherent advantages of the aerated concrete panel, such as being lightweight and having high heat insulation properties, are not impaired. In addition, since the specific gravity inside the panel changes continuously, no faults occur inside the panel, stress concentration due to impact etc. does not occur, and it is difficult to place concrete slurries with different specific gravity in multiple layers. No more chipping or peeling occurs.

Furthermore, if the powder 7 is spread before the surface of the slurry 4 loses its fluidity, that is, when the slurry 4 is soft and sticky, the powder 7 may The powder particles 7 easily adhere to the surface of the slurry 4, and there is very little risk that the powder 7 will peel off from the surface of the slurry 4 before being pressed by the roller-shaped pressure member 8.

Furthermore, while the slurry 4 is in a soft state, the granular material 7 is
Since it is possible to press the granular material 7, the bonding of the granular material 7 to the slurry 4 can be strengthened, and the adhesion of the granular material 7 can be achieved reliably.

In addition, since the slurry 4 is poured into the formwork 1, it is possible to reliably hold the slurry 4 in a fluid state, making it easy to handle the slurry 4, and when pressing with the roller-shaped pressure member 8. Moreover, the slurry 4 does not lose its shape or protrude, and a good molding operation is possible.

Furthermore, when the surface of the slurry 4 is pressed by the roller-shaped pressure member 8 in a soft state, the slurry 4 tends to adhere to the circumferential surface of the pressure member 8;
Sprinkle powder 7 on the surface of slurry 4,
Since it is interposed between the pressure member 8 and the pressure member 8, it is possible to prevent the slurry 4 from adhering to the pressure member 8, and the panel surface 9 can be formed extremely easily and smoothly.

Furthermore, since the movement level of the roller-shaped pressure member 8 is regulated by the formwork 1 and the touch sensor, the panel surface 9 must always be defined at a constant level flat with respect to the upper edge of the formwork 1. Can be done.

Furthermore, the above-described embodiments can be easily applied to the manufacture of large panels, and have the effect of easily responding to the recent trend of increasing panel size.

In the above embodiment, the spreader 6 and the roller-shaped pressure member 8 are moved relative to the formwork 1, but the formwork 1 may be moved. In addition, although a touch sensor or the like is used to control the movement level of the roller-shaped pressure member 8, control by a touch sensor or the like is not necessarily necessary, and the position may be regulated by mechanical contact between the pressure member side and the formwork side. It's okay.

For example, the roller-shaped pressure member 8 can be pressed against the panel surface 9 with a predetermined pressure by the peripheral surface, shaft, etc. of the roller-shaped pressure member 8, and by rolling it into pressure contact with the upper edge of the formwork 1. The movement level can be kept constant, and the panel surface 9 can be defined as a flat state at a constant level to which the powder 7 is fixed.

However, if a touch sensor or the like is used, it is possible to extremely easily define the panel surface 9 to be flat at a certain level by servo control or the like.

As described above, according to the present invention, the panel surface is defined with good workability by eliminating the raised part of the aerated concrete slurry in the formwork, and at the same time, it is lightweight and has a panel surface that is excellently suited as a wall surface of a building. A method of manufacturing an aerated concrete panel can be provided.

[Brief explanation of drawings]

FIG. 1 is a side view showing a raised portion of slurry poured into a formwork, and FIGS. 2 to 8 are perspective views showing the manufacturing process of an embodiment of the method for manufacturing a lightweight aerated concrete panel according to the present invention. 9 are diagrams showing changes in the specific gravity in the thickness direction inside the panel manufactured according to the above embodiment. DESCRIPTION OF SYMBOLS 1... Formwork, 4... Aerated concrete slurry, 5... Mounded portion, 7... Powder, 8... Roller-shaped pressure member, 9... Panel surface.

Claims (1)

[Claims] 1 After pouring the aerated concrete slurry into the formwork, before the slurry surface loses its fluidity, powder consisting of aggregate is sprinkled on the slurry surface, and then the bulges formed on the slurry surface are removed. A roller-shaped pressure member whose position is regulated by the formwork is brought into contact with the mold, and the roller-shaped pressure member presses the raised portion against the formwork to a predetermined level to define the panel surface and at the same time remove powder. A method for producing a lightweight aerated concrete panel characterized by fixing granules to the panel surface.