JP2628959B2 - Manufacturing method of lightweight concrete board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a lightweight concrete plate.

[0002]

2. Description of the Related Art Conventionally, it has been known to use a reinforcing steel net to increase the bending strength of a lightweight concrete plate.

[0003]

However, in the above-mentioned conventional manufacturing method, the rebar mesh used has a large specific gravity of 7.8, which causes an increase in the weight of the lightweight concrete plate to be manufactured. There is a possibility that the most important purpose of the conversion cannot be achieved.

In addition, there is a problem that the bending strength of the lightweight concrete plate is degraded due to corrosion of reinforcing steel due to cracks or the like due to a decrease in durability of the lightweight concrete plate.

The present invention has been made in view of the above circumstances, and has as its object to provide a method of manufacturing a lightweight concrete plate having a light weight and a high bending strength.

[0006]

SUMMARY OF THE INVENTION According to the present invention, an alkali-resistant synthetic resin fiber net is attached to a mold under tension.
An end of the alkali-resistant synthetic resin fiber net projecting outside the formwork is welded and fixed to the formwork by means such as heating.
A light-weight ready-mixed concrete or light-weight mortar is poured into the formwork and solidified .
The present invention relates to a method for manufacturing a lightweight concrete plate, wherein a fixing portion is removed from the mold and the mold is removed .

[0007]

Therefore, in the present invention, since the alkali-resistant synthetic resin fiber net is used, the bond between the alkali-resistant synthetic resin fiber net and the lightweight ready-mixed concrete is strengthened, and the lightweight concrete having light weight and excellent bending strength is provided. A plate can be manufactured, and when the alkali-resistant synthetic resin fiber net is fixed in the mold, the end of the alkali-resistant synthetic resin fiber net protruding outside the mold is heated or the like. to weld the mold, members for fixing the alkali-resistant synthetic resin fiber network is unnecessary, it can be securely fixed to the alkali-resistant synthetic resin fiber network in place it is possible to reduce the cost of the member min So you can improve the strength of the product
And when removed from the mold, an alkali-resistant synthetic resin fiber net
Is cut off, and this cut causes the alkali resistance
The tension of the synthetic resin fiber network is released and the alkali-resistant synthetic resin
Due to the shrinkage of the fiber net,
The stress due to shrinkage occurs, and as a result,
The strength of the entire lightweight concrete plate is further improved by the force
Will be able to

[0008]

Embodiments of the present invention will be described below.

FIGS. 1 to 4 show an embodiment of the present invention.

An alkali-resistant synthetic resin fiber net 1 is attached to a mold 2 while being pulled left and right into the mold 2, and the end of the alkali-resistant synthetic resin fiber net 1 protruding outside of the form 2 is fixed so as not to be displaced. The fixing portion 3 is provided by welding by means of heating or the like, and then lightweight ready-mixed concrete or lightweight mortar 4 is poured into the mold 2 and, after hardening, fixed from the mold 2 to the fixing portion 3.
Then, the plate-shaped lightweight concrete plate 5 is taken out.

As the lightweight concrete, for example, 50 parts by weight of a commercially available Portland cement as a binder,
A mixture prepared by adding 70% by weight of water to a concrete material mixture of 10 parts by weight of quick lime and 40 parts by weight of silas balun (finely divided shirasu) as an aggregate is used.

The lightweight concrete plate 5 obtained as described above
Since the specific gravity of the alkali-resistant synthetic resin fiber net 1 is 1.14, the specific gravity of the conventional reinforcing steel net is as small as about 1/7 as compared with that of 7.8, which is very light. Even when the cut surface is observed, the alkali-resistant synthetic resin fiber net 1 is evenly embedded in the lightweight ready-mixed concrete or the lightweight mortar 4, and the alkali-resistant synthetic resin fiber net 1 is separated from the light-weight ready-mixed concrete or the four layers of the lightweight mortar. No adhesion was observed and the adhesion was good.

Since the alkali-resistant synthetic resin fiber net 1 is buried in lightweight ready-mixed concrete or light-weight mortar 4, the connection between the alkali-resistant synthetic resin fiber net 1 and the light-weight ready-mixed concrete or light-weight mortar 4 is strengthened. A lightweight concrete plate 5 having excellent properties such as strength (bending, tenacity, friction, and knotting) and elastic recovery of the alkali-resistant synthetic resin fiber net 1 can be manufactured.

The method for manufacturing a lightweight concrete plate of the present invention is not limited to the above-described embodiment.
It goes without saying that various changes can be made without departing from the spirit of the present invention.

[0015]

According to the method for manufacturing a lightweight concrete board of the present invention described above, the use of the alkali-resistant synthetic resin fiber network strengthens the bond between the alkali-resistant synthetic resin fiber network and the lightweight concrete. The low specific gravity of the alkali-resistant synthetic resin fiber net and the excellent bending strength characteristics can be imparted, and therefore, the disadvantage that the weight of the lightweight concrete board is degraded due to the heavy weight and the deterioration of the bending strength using the conventional reinforcing net is greatly reduced. It is possible to manufacture a lightweight concrete plate that has been eliminated, and when fixing the alkali-resistant synthetic resin fiber net in the mold, heat the end of the alkali-resistant synthetic resin fiber net protruding outside the form. And the like, the member for fixing the alkali-resistant synthetic resin fiber net becomes unnecessary, and the cost for the member can be reduced. The so alkali resistance synthetic resin fiber network Ru can be securely fixed in position in improving the strength of the product
Can be made, and when demolded, alkali-resistant synthetic resin fiber
The end of the net is cut, which cuts the alkali resistant
The alkali-resistant synthetic tree
Due to the shrinking of the fatty fiber net,
The stress due to the shrinkage comes to occur, as a result,
The stress further increases the strength of the entire lightweight concrete plate
An excellent effect ing so that it can be.

[Brief description of the drawings]

FIG. 1 is a cutaway front view showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a cut front view of a product obtained according to one embodiment of the present invention.

FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Alkali-resistant synthetic resin fiber net 2 Formwork 3 Fixing part 4 Lightweight ready-mixed concrete or lightweight mortar 5 Lightweight concrete board

Claims (1)

(57) [Claims] 1. An alkali-resistant synthetic resin fiber net is attached to a mold while being tensioned, and an end of the alkali-resistant synthetic resin fiber net protruding outside the mold is heated by means such as heating. A fixed portion is provided by welding and fixing to the frame, light weight ready-mixed concrete or lightweight mortar is poured into the mold to be solidified , and the fixed portion is removed from the mold and removed from the mold. Manufacturing method of lightweight concrete board.