JPH10119025A - Foam synthetic resin formwork - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent troubles such as corrosion and dew condensation from developing in an exterior finishing material by leading excess water not used for the curing of a concrete to the outside by a method wherein passages for discharging the excess water are formed on the inside surface on the concrete placement side of a form member made of foamed synthetic resin. SOLUTION: Excess water, which is not used for the curing of a concrete during the process, in which the placed concrete cures, leaks to the surface of the concrete. Since the excess water passes through a covering material, these excess waters are discharged in near vertical grooves 31 and flow down in the grooves 31 and finally discharged outside through the gap provided at the lower end surfaces of form members 12 or the like. Accordingly, even at the stage for completing a building by interposing an exterior finishing material, the corrosion of a foundation, of the exterior finishing material or the like and the dew condensation near the surface of the concrete or the like can be prevented from developing. Further, even after the elapse of long period of time, no excess water is left near the surface of the concrete.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a foamed synthetic resin form used for constructing concrete foundations, walls and the like in the field of civil engineering or construction.

[0002]

2. Description of the Related Art Conventionally, when building a foundation or a wall of a building, a wooden form material made of a so-called "panel", such as a southern lumber or a plywood, has been widely used. Therefore, today, a large amount of timber, which is a valuable forest resource, is consumed as a formwork, and furthermore, a large amount of industrial waste is produced.

In view of such circumstances, in recent years, effective use of resources has been advocated from the viewpoint of global environmental protection and the like. Therefore, such a wooden form member has been replaced with another form member. Instead, effective use of wood is being pursued. For example, as a substitute for a wooden formwork, a formwork made of unfoamed synthetic resin or foamed synthetic resin is used. Among them, in particular, when a foamed synthetic resin formwork is used, the use of wood is reduced. Needless to say, heat insulation can be imparted to the concrete wall, and the utilization effect is enormous.

[0004]

By the way, of the water contained in the poured concrete, about 15% to 30% of the water is not usually used for hardening the concrete, but is used as surplus water. Remains.

The surplus water not used for concrete hardening is discharged from the concrete surface gradually within a short period of time until the concrete hardens or over a long period after the hardening. But,
If the surplus water loses a refuge, there is a problem that the exterior material on the outer surface of the concrete is corroded, and dew condensation occurs on the concrete surface in winter.

SUMMARY OF THE INVENTION In view of the above problems, the present invention can actively lead surplus water not used for concrete hardening to the outside until concrete hardens or for a long period thereafter. It is an object of the present invention to provide a foamed synthetic resin form that can be formed and that can prevent problems such as corrosion and dew condensation of an exterior material.

[0007]

In the foamed synthetic resin form of the present invention, a passage for discharging surplus water is formed on the inner surface of the foamed synthetic resin form member on the concrete casting side. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a discharge passage for surplus water is formed in a vertical direction. The passage for discharging the surplus water may be any structure that can guide water or steam.
Specifically, it can be constituted by a groove or a covering material extending in the vertical direction, or a combination of these.

Non-woven fabric,
It is preferable to use any one of the mesh-like cloth bands.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the foamed synthetic resin form of the present invention, and particularly illustrates a foamed synthetic resin form used when constructing a foundation with a footing of a building. FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

The foamed synthetic resin form 11 of the present embodiment is composed of a pair of form members 12 and 12 which are arranged to face each other, and these form members 12 have the same shape. Are arranged facing each other with a certain distance therebetween so as to form a space A for placing concrete. The height width and thickness of the mold member 12 are not particularly limited, and can be set freely. However, the form member 12 must have a self-holding property, and the thickness of the form member 12 is actually 20 mm to 70 mm so that it can withstand the internal pressure caused by casting concrete. About 30 mm to 60 mm.

As the foamed synthetic resin material forming the frame member 12, foamed synthetic resins such as polystyrene, polyethylene, polyvinyl chloride, polypropylene, polyurethane, epoxy resin and phenol resin can be used, and particularly limited ones are available. is not.

The expansion ratio differs depending on the material used.
It is 0 times, and the expansion ratio of about 40 times is most preferable in consideration of reduction of material costs and the like. The foaming ratio can be changed between the inner surface of the form member 12 on the side in contact with the concrete and the outer surface on the side not in contact with the concrete.

Further, as shown in FIG.
On the inner surface 14 of the footing portion 33 and the fabric base portion 32,
Vertical grooves 31 extending downward from above are formed at predetermined intervals. These vertical grooves 31 function as passages for discharging excess water in the concrete to the outside as described later, and the number of formed vertical grooves 31 is not limited to two. It is set appropriately according to the conditions.

The contact boundary between the vertical groove 31 and the space A into which the concrete is poured, that is, the vertical groove 3
As shown in FIG. 3, a covering material 34 is fixed to the opening end face of the first member 1 by an appropriate means.

The covering material 34 may be made of any material as long as it blocks the flow of concrete, but it is preferable to use a lath, a nonwoven fabric, a mesh-like cloth band, or the like. By fixing such a covering material 34, concrete is prevented from flowing into the groove 31. When a non-woven fabric or a mesh-like cloth band is selected as the covering material 34, the covering material 34 is used.
Can be used as a passage for guiding steam or liquid water upward or downward. In addition, these coating materials 34 can be interposed over the entire area of the inner surface 14.

Further, as shown in an enlarged view in FIG. 4, the form member 12 has an inner surface 14 on the concrete casting side.
A plurality of conical or tapered separator recesses 13 are provided at regular intervals. The separator recess penetrating guide recess 13 guides the leading end 43A of the separator 40 shown in FIG. 5 and penetrates from the separator leading end 43A toward the outside in the thickness direction of the mold member 12 to form the mold member. 12 are large enough to be inserted up to the outer surface 15 of the device 12, and are formed in large numbers at the top, bottom, left and right at appropriate intervals. The shape of the guide recess 13 for penetrating the separator is not limited to the illustrated conical shape. Further, a thin hole may be formed to the outer surface 15 in communication with the guide recess 13 for penetrating the separator.

On the other hand, the separator 40 used together with the mold member 12 of the present embodiment regulates the distance between the pair of opposed mold members 12 to be constant, and when the concrete is cast, the mold member 12 is It has a function of preventing it from bulging outward, and is inserted through the form member 12. The separator may have any configuration as long as it has such a function. For example, the separator 4 shown in FIG.
In the case of 0, the cone 42 and the foam tie 4
3 are arranged, and a round pipe rib washer 44 and a nut 45 are attached to both ends of the foam tie 43.

If the tip 43A of the foam tie 43 of the separator 40 is pierced from the separator fitting guide recess 13 formed on the inner surface 14 on the concrete casting side of the foam member 12 made of expanded polystyrene, As shown in FIG. 6, a continuous small hole 16 is formed in the outer surface 15 of the form member 12 so that the form tie 43 can be inserted.

The operation procedure when assembling such a form member 12 as a form work on site is described below.
This will be described with reference to FIG. First, the form members 12, 12 are opposed to each other with a predetermined space therebetween on the waste concrete 47 cast on the crushed stone 46, and the concrete placing space A is formed by these form members 12. Form.

Then, the leading end 43A of each foam tie 43 penetrates through the guide recess 13 for penetrating the separator formed on the inner surface 14 of the form member 12 on the concrete casting side, and the outside of the form member 12 is The assembly including the round bar 41, the cone 42, and the foam tie 43 is disposed between the form members 12.

As described above, when the round bar 41 is inserted together with the cone 42, the vertical and horizontal pipes 4
8 and 49 are arranged, the washer 44 is inserted into the foam tie 43, and the foam tie 43 is fixed by fastening with a nut 45.

On the other hand, the form members 12, 12 are assembled, and the reinforcing bars 51, the width bars 52, the vertical bars 53, and the horizontal bars 54 are provided in the concrete placing space A formed therebetween.
Are laid out and connected with a binding wire (not shown). In this way, all preparations for placing concrete are completed, and concrete is actually placed.

According to this embodiment, when concrete is poured into the concrete placing space A, the form member 1
Since the covering material 34 is interposed in advance on the inner surface 14 on the concrete placing side of No. 2, concrete containing gravel and the like does not flow into the vertical groove 31. Therefore,
Even if concrete is cast, the space of the vertical groove 31 can be secured as it is without being crushed.

On the other hand, in the process until the poured concrete is hardened, surplus water not used for hardening the cement leaks to the concrete surface. Since these surplus water passes through the covering material 34, as shown in FIG. 7, the surplus water discharged into the nearby flute 31 is further discharged into the flute 31. And is discharged outward through a gap such as the lower end surface of the form member 12. On the other hand, a part of the surplus water discharged into the vertical groove 31 may be steam, but in that case, it is guided upward and discharged to the outside through a gap formed in the upper part. .

As described above, the surplus water not used when the concrete hardens is guided downward or upward through the vertical groove 31 and is discharged to the outside. As shown in FIG. Even when it is time to set up a foundation above the foundation, build a wall on top of it, and interpose exterior materials outside to complete the building, the foundation or exterior materials etc. are corroded by water Or dew condensation or the like near the surface can be prevented.

When the concrete hardens, the vertical and horizontal pipes 48 and 49 are removed, and the foam tie 43 is removed. Also, the form members 12, 12 are left in a state where they are driven as they are.

As described above, by leaving the form member 12 made of the foamed synthetic resin around the concrete block, a heat insulating foundation can be constructed here. Even if several years have passed after the concrete has hardened, the excess water that has not yet been used for concrete hardening will leak from the concrete surface as steam in many cases. The water is impregnated with the air in the groove 31 and then guided upward or downward, and is discharged to the outside together with the air from an opening or the like communicating with the outside. When the covering material 34 is made of a water-permeable material, it can be used as a passage itself. In that case, the water vapor or solidified water can be guided upward or downward and discharged to the outside. Therefore, even after a long time has passed, surplus water does not remain near the concrete surface.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example,
In the above embodiment, the coating material 34 is fixed to the opening of the vertical groove 31 and the vertical groove 31 and the coating material 34 are used as the discharge passage. However, the vertical groove 31 is not formed and only the coating material 34 is used. A discharge passage for surplus water may be formed. In that case, it is preferable to use any of a nonwoven fabric and a mesh-like cloth band as the covering material 34.

Even when only the covering material 34 is formed as a passage for surplus water as described above, the surplus water discharged when the concrete hardens or thereafter gradually discharges over a long period of time. Surplus water that comes can be positively discharged to the outside.

Therefore, as in the above embodiment, there is no possibility that moisture causing dew condensation or the like remains near the concrete surface. In the above embodiment, the foamed synthetic resin form used for the footing-equipped base has been described. However, the present invention is, of course, applicable to a form for constructing other portions such as a form for a wall for constructing a wall. Is also applicable.

[0032]

As described above, in the foamed synthetic resin form of the present invention, since a groove or a passage made of a coating material is formed on the inner surface of the form to promote the discharge of water, surplus water is reduced downward. Alternatively, the excess water can be guided upward, so that the surplus water can be actively discharged to the outside even during a short period of time until the concrete hardens or for a long period thereafter.

Therefore, it is possible to prevent problems such as corrosion of the exterior material and dew formation. Further, according to the foamed synthetic resin form of the present invention, the use of wood can be reduced, and the form can be easily assembled even when there is no skilled worker.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a foamed synthetic resin form of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged sectional view showing a state in which a coating material is interposed in the vertical groove shown in FIG.

FIG. 4 is a sectional view when a separator is assembled to the foamed synthetic resin form of the embodiment.

FIG. 5 is an exploded view showing an example of a separator used in the embodiment.

FIG. 6 is a cross-sectional view when the foamed synthetic resin form of the embodiment is actually assembled.

FIG. 7 is a sectional view showing the operation of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Foam synthetic resin form 12 ... Form member 14 ... Inner surface 31 ... Vertical groove 34 ... Coating material 40 ... Separator

Claims (5)

[Claims] 1. Foaming characterized in that a vertical groove for discharging surplus water remaining after the concrete is hardened is formed on the inner surface of the mold member made of foamed synthetic resin on the concrete casting side. Synthetic resin formwork. 2. A foam synthetic resin form according to claim 1, wherein a covering material is interposed at a contact interface between the flute and the cast concrete. 3. The foamed synthetic resin form according to claim 2, wherein the covering material is one of a lath, a nonwoven fabric, and a mesh-like cloth band. 4. A coating material for discharging surplus water remaining after the concrete has hardened to the outside is interposed on the inner surface of the form member made of foamed synthetic resin on the concrete casting side. Foam synthetic resin formwork. 5. The foam synthetic resin form according to claim 4, wherein the covering material is one of a nonwoven fabric and a mesh-like cloth band.