JPH02190305A - Manufacture of light foam concrete-plate with inserted reinforcing core - Google Patents

Abstract

PURPOSE:To improve remarkably the efficiency of production, while the postworking after curing is unnecessary by molding a concrete plate, while a reinforcing core is supported with cement spacers. CONSTITUTION:The reinforcing core 4 composed of metal or the resin with relative by high heat resistance such as polypropylene or polyester, etc., is supported with spacers 3, and then cement slurry 5 is cast in a form 1. The spacer 3 is the formed object of the cement group composed of the almost same compound as the cement slurry 5 for the plate of light foam cement, and it is preferably the material wherein precuring is finished. By causing the compounding amounts of the spacer 3 and the cement slurry 5 to be almost same, compatibility of the spacer 3 to the cement slurry 5 is excellent, whereby the crack or peeling which is otherwise apt to occur at the peripheral part of the spacer 3 of the light foam concrete-plate 6 at the time of the curing of cement slurry 5 in the curing after molding, may be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for manufacturing lightweight aerated concrete plates with reinforcing cores inserted therein. More specifically, this invention
The present invention relates to a method for manufacturing lightweight aerated concrete plates with reinforcing cores, which does not require post-processing after forming and can improve manufacturing efficiency.

(Prior art) Lightweight aerated concrete molded plates, which are made by mixing air bubbles into a slurry mainly composed of cement and water, have been known, and are widely used as they have excellent heat insulation properties and are easy to construct.・As such molded plates, various types have been developed, such as low specific gravity ALC and aerated concrete plates, which have a specific gravity reduced to about 0.6 to 0.7 by dispersing lightweight aggregate and air bubbles, etc., and have various uses. It has been used in various ways depending on the situation.

In addition, in the case of low specific gravity concrete plates made of ALC, aerated concrete, etc., although their various properties such as heat insulation and sound absorption are good, their strength is low, so metal Alternatively, reinforcing cores made of heat-resistant resin such as polypropylene and polyester have been inserted into lightweight cellular concrete plates to improve their strength. For this lightweight aerated concrete board with a reinforcing core, for example, as shown in Figure 2, a mold (B) is placed at the bottom of the formwork (A), and the mold is placed at a predetermined position on the top surface at arbitrary intervals. Spacers (2) are placed to support the reinforcing core (2), and then cellular cement slurry is poured into the formwork (A) to form lightweight cellular concrete plates (3).

(Problems to be Solved by the Invention) However, the lightweight aerated concrete plate (E) formed by the conventional method illustrated in FIG. For example, as shown in Figure 3,
The heat treatment melts the resin spacer (2) and creates holes (force) on the surface of the lightweight cellular concrete board (E). For this reason, the holes had to be filled after curing, making post-processing troublesome.

In addition, even if holes (force) do not occur, the compatibility between the spacer (1) and the cement slurry is poor due to the difference in materials between the spacer (1) and the lightweight aerated concrete board (O).
As the cement slurry hardens, cracks (
There was also the problem that peeling occurred.

Furthermore, the boundary between the spacer (2) and the lightweight aerated concrete plate (3) was noticeable, so post-processing after curing was essential.

This invention was made in view of the above circumstances,
It eliminates the disadvantage of post-processing after forming in the conventional manufacturing method of lightweight aerated concrete plates with reinforcing cores, and has excellent strength.
Moreover, it is an object of the present invention to provide an improved method for manufacturing lightweight aerated concrete plates with reinforcing cores inserted, which does not require post-processing after forming and can improve manufacturing efficiency.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention proposes, in manufacturing lightweight aerated concrete plates with reinforcing cores, supporting the reinforcing cores with cement-based spacers and performing cast molding. The present invention provides a method for manufacturing a lightweight aerated concrete board with a reinforcing core inserted.

(Function) In the method of manufacturing lightweight aerated concrete plates with reinforcing cores of the present invention, spacers made of cement are used, so even if curing such as autoclaving after molding is performed, the spacers will not melt as in conventional methods. In addition, when using a cement-based spacer with a combination of lightweight aerated concrete plates and roadways, the spacer and the lightweight aerated concrete plates fit well together. , No cracks or peeling occur around the spacer, so there is no need for post-processing after curing.

Hereinafter, the method for manufacturing a lightweight aerated concrete plate with a reinforcing core according to the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a cross-sectional view illustrating the method of manufacturing a lightweight aerated concrete plate with a reinforcing core inserted according to the present invention.

Similar to the conventional method shown in Fig. 2, this method also places a mold (2) at the bottom of the mold (1), and
) Cement spacers (3) are placed at predetermined positions on the upper surface of the base plate at arbitrary intervals. This spacer (3) supports a reinforcing core (4) made of metal or a resin with high specific axial heat resistance such as polypropylene or polyester, and then cement slurry (5) is poured into the formwork (1). .

The spacer (3) is a cement-based molded body made of a mixture of the cement slurry (5) of a lightweight cellular cement board and the cement slurry (5), preferably at the end of pre-curing. 5), the spacer (3) and the cement slurry (5) have good compatibility, and during curing after forming, the lightweight aerated concrete board ( It is possible to prevent cracks and peeling that tend to occur around the spacer (5) in 6), and
The boundary between the spacer (3) and the lightweight aerated concrete board (6) is also inconspicuous.

A specific example of the method for manufacturing a lightweight cellular concrete board with a reinforcing core inserted as shown in FIG. 1 will be described below.

(Example) Prepared air bubbles were added to a cement slurry made by mixing cement, lightweight aggregate, and water to prepare a lightweight cellular cement slurry whose specific gravity was adjusted to 0.7. This slurry was used to mold a spacer. It was then pre-cured and manufactured. As shown in Figure 1, this spacer is placed on the top surface of the mold placed at the bottom of the predetermined formwork, a reinforcing bar as a reinforcing core is inserted, this is supported by the top surface of the spacer, and the formwork is placed on the top surface of the mold. Inside, the specific gravity of air bubbles mixed with the same composition as the spacer is 0.
7 cement slurry was cast. After the cement slurry had hardened, the molded body was removed from the mold and cured in an autoclave.

No holes were found on the surface of the lightweight aerated concrete board after curing. Furthermore, no cracks or peeling were observed around the spacer of the concrete plate, and the boundary between the spacer and the concrete plate was not noticeable.

Of course, the invention is not limited to the above examples. It goes without saying that various aspects are possible with respect to the component composition and specific gravity of the cement slurry, the material and structure of the formwork and mold, and even the curing method, based on conventional methods.

(Effect of the invention) By the method of manufacturing a lightweight aerated concrete board of this invention,
There is no need for post-processing after curing, and the manufacturing efficiency of lightweight aerated concrete plates is significantly improved.

In addition, the boundary between the spacer and the concrete plate is not noticeable, and it is possible to easily produce a lightweight aerated concrete plate with a reinforcing core inserted, which has a good surface finish.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of the method for manufacturing a lightweight aerated concrete plate with a reinforcing core inserted according to the present invention. FIG. 2 is a sectional view showing a conventional method. FIG. 3 is a sectional view showing a lightweight aerated concrete board with a reinforcing core inserted by a conventional method. 1... Formwork 2... Molding mold 3.
...Spacer 4...Reinforcement core 5...
Cement Slurry 6...Lightweight Aerated Concrete Plate Agent Patent Attorney Toshio Nishizawa Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) A method for producing a lightweight aerated concrete board with a reinforcing core, characterized in that the reinforcing core is supported by a cement spacer and cast-molded. (2) The method for manufacturing a lightweight cellular concrete board with a reinforcing core inserted therein according to claim (1), wherein the spacer is a cement-based molded body having substantially the same composition as the cement slurry.