JPH06280331A - Permanent form for concrete construction - Google Patents

Abstract

(57) [Abstract] [Purpose] A permanent formwork for concrete work, which allows the formwork to be cut very easily, and in which the engaging step can naturally be formed even after cutting. The purpose is to provide. [Structure] A fiber-reinforced cement plate-shaped body 1 having a smooth surface 1A and a plurality of convex stripes 2 ... 2 formed on a back surface 1B, and a step-like shape in which widthwise ends 1C and 1C are fitted to each other. The engaging step portions 4A, 4B are provided, and at least the wall base material 5 is provided.
A separation layer 6 having a width b substantially equal to the width B of the engaging step portions 4A and 4B is provided in the thickness of the solid plate-like body 1 at a position corresponding to the engaging step portion if cut at this portion. Is made to appear.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent formwork for concrete work.

[0002]

2. Description of the Related Art Generally, when building a concrete wall, a mold made of plywood or the like is assembled, concrete is poured into the mold to wait for hardening, and the mold is removed to apply various makeups or heat insulation to the surface. The construction was done by the procedure of sticking the material. However, in the case of the above-mentioned formwork method, the formwork is used only as a mold for constructing a wall surface, and there is a drawback that the subsequent work of removing the formwork takes a lot of time and effort.

Further, since the conventional formwork is made of plywood and uses natural materials, even if it is repeatedly used, it will eventually be discarded, and the amount used in one construction work is very large. In addition to this, the consumption of natural materials is significant, and their use must be restricted from the viewpoint of protecting the natural environment. From such a viewpoint, a concrete formwork made of fiber reinforced cement has been proposed, and it has been proposed to use it instead of the conventional plywood formwork (for example, JP-A-3-293473).
Issue). This kind of concrete formwork has an advantage that it hardly uses natural resources such as wood, and finally it is integrated with the concrete to be placed, and it is directly integrated with the walls or columns of the building structure. Therefore, there is an advantage that the subsequent frame removing work can be omitted.

[0004]

[Problems of the prior art] However, since the concrete formwork is hard in terms of material, it is difficult to nail and fix it during frame work, and when it is necessary to cut the formwork according to the size of the building. Since concrete formwork is hard and brittle, it is not easy to cut it, and if it is cut, there is no engaging step part, so there is a drawback that joining with other concrete formwork is very troublesome. It was

[0005]

SUMMARY OF THE INVENTION In view of the above problems, the present invention makes it possible to very easily perform cutting of a mold or the like in a concrete mold, and the engaging step can be formed naturally even after cutting. It was made for the purpose of providing a permanent formwork for concrete construction.

[0006]

That is, a permanent formwork for concrete construction according to the present invention is a solid plate body made of fiber reinforced cement having a plurality of ridges formed on the back surface, and has a widthwise end portion. Is provided with a stepped engagement step portion that fits with each other, and a separation layer having a width substantially equal to the width of the engagement step portion is provided at a position corresponding to at least the wall base material of the solid plate body. It is characterized in that it is provided within the thickness of the plate-like body, and that cutting marks are provided at both ends of the separation layer on the front and back surfaces of the solid plate.

[0007]

Embodiments of the present invention will be described below. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a plan view showing a usage state of the embodiment.

Permanent formwork 1 for concrete work shown in FIG.
Is a fiber-reinforced cement plate-shaped body 1 having a smooth surface 1A and a plurality of ridges 2 ... 2 formed on the back surface 1B, and has a step-like shape that fits to width-direction end portions 1C and 1C. Engaging step portions 4A, 4B are provided, and at least the wall base material 5 (FIG. 3)
A separating layer 6 having a width b substantially equal to the width B of the engaging step portions 4A and 4B is provided in the thickness of the solid plate body 1 at a position corresponding to.

Further, as is apparent from the operation described below,
Marks or notch grooves 3 and 3 indicating cut points are provided on the front and back surfaces of the plate-shaped body 1 corresponding to the separation layer 6. The separation layer 6 is a thin hollow layer in addition to embedding a sheet subjected to a peeling treatment.

The permanent mold 1 for concrete work is molded by extrusion molding or cast molding. Needless to say, the length and width of the permanent formwork 1 for concrete construction are formed according to the same standard dimensions as those of conventional building materials.

[0011]

When performing the formwork using the permanent formwork 1 for concrete work according to the present invention, when it becomes necessary to cut the permanent formwork 1 for concrete work, both sides of the separation layer 6 part, Using the marks or notch grooves 3 and 3 as marks, the permanent formwork 1 for concrete construction is cut at that portion.

As shown in FIG. 3, the stepped shape appears at the boundary of the separation layer 6 by cutting, and the shape at this time directly constitutes the engaging stepped portions 4A, 4B. Therefore, it becomes possible to join the new permanent formwork 1 for concrete work by utilizing this. Since the thickness of the separation layer 6 is much smaller than the thickness of the entire permanent formwork 1 for concrete construction, there is almost no effect on the strength of the separation layer 6 when it is not cut.

[0013]

As described above, according to the present invention, when performing a formwork with a concrete formwork, and when it becomes necessary to cut the permanent formwork for concrete work, it is possible to cut it with the separation layer 6 portion as it is. Since the shape of the step portion for joining appears, it becomes possible to join the new permanent mold 1 for concrete work without difficulty, and the accurate mold assembling work becomes possible. Further, since wood, which is a natural resource, is not used at all, it has various effects such as contributing to nature conservation.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a plan view showing a usage state of the embodiment.

[Explanation of Codes] 1 ... Permanent formwork for concrete construction 1A ... Front surface 1B ... Back surface 1C ... Width direction end portion 2 ... Convex groove 3 ... Notch groove 4A, 4B ... Engaging step portion 5 ... Wall base material 6 ... Separation layer

Claims (1)

[Claims] 1. A solid plate body made of fiber reinforced cement having a plurality of ridges formed on the back surface, wherein stepwise engaging step portions are provided at the ends in the width direction for fitting with each other. A separating layer having a width substantially equal to the width of the engaging step portion is provided within the thickness of the solid plate at least at a position corresponding to the wall base material of the solid plate, and the front and back surfaces of the solid plate. A permanent formwork for concrete construction, characterized in that cutting marks are provided at both ends of the separation layer.