JPH0510025A - Constructing method for concrete structural-body having rugged section on surface - Google Patents

Abstract

PURPOSE:To ensure the quality of concrete by fitting a non-water-absorbing sheet having rugged sections on the surface, to be easily separated, in a form, to place concrete on said sheet, and by forming a concrete structural-body with rugged sections formed on the surface. CONSTITUTION:A rugged surface forming non-water-absorbing sheet 1 is formed with recessed sections (a) and projected sections (b) arranged on one side surface. Then, inside a form 2, the non-water-absorbing sheet 1 is fitted with the use of stapler pins or the like to be easily separated from the form 2. After that, in the form 2, concrete 5 is placed, and after the concrete is hardened, the form 2 is removed in a state that the non-water-absorbing sheet 1 is left. Besides, when the non-water-absorbing sheet 1 is removed at a proper time, then a concrete structural-body with rugged sections having anchor effect formed on the surface is obtained, and the work of mortar coating or the like is easily executed. As a result, the rugged sections are worked also as wet curing for the concrete structural-body, and the quality of the concrete can be ensured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a concrete structure having an uneven surface.

[0002]

2. Description of the Related Art When mortar is applied to the surface of a concrete skeleton to finish it, or when tiles are fixed with mortar to finish it, unevenness for engaging the mortar layer on the surface of the concrete skeleton to exert the anchoring effect is provided in advance. Forming it is very effective in preventing the mortar layer and tiles from peeling off.

However, in the past, Japanese Patent Publication No. 3-37
As can be seen in Japanese Patent Publication No. 83, the concrete is placed using a formwork having a protrusion on its inner surface or a formwork having a formwork material with a protrusion fixed to its inner surface, and the concrete exhibits a certain strength. At that time, it was demolded to form a recess on the surface of the concrete skeleton.

For this reason, after the demolding, before the mortar is applied, the recesses are clogged with dust, the adhesive force of the mortar layer is reduced, and only near the surface of the concrete skeleton is quickly dried and shrunk to cause the quality of the concrete to rise. Could have an adverse effect on. Of course, these disadvantages can be avoided by removing the mold immediately before applying the mortar, but in this case, since the mold is left for a period longer than necessary,
Convertibility of formwork is reduced, which is disadvantageous in terms of cost.

[0005]

SUMMARY OF THE INVENTION The present invention has been made with the above points in mind. The purpose of the present invention is to remove the mold from the mold as soon as possible to improve the diversion of the mold. Even while securing it, dust is not clogged into the irregularities formed on the concrete skeleton surface from the demolding to the formation of the mortar layer, and the hardening of the concrete skeleton progresses slowly to ensure concrete quality. To do.

[0006]

In order to solve the above problems, in the present invention, concrete is placed in a mold with a non-water-absorbent sheet for molding uneven surfaces attached to the inner surface of the mold. After the hardening of the concrete, the form was removed while leaving the non-water-absorbent sheet left, and then the non-water-absorbent sheet was removed to construct a concrete structure having irregularities on the surface.

[0007]

According to the above construction, the mold is removed while leaving the non-water-absorbent sheet for molding the uneven surface, so that the mold can be removed as early as possible to ensure the convertibility of the mold. While
The concrete body is cured by the non-water-absorbent sheet. Therefore, the hardening of the concrete skeleton proceeds slowly, the quality of the concrete can be ensured, and there is no fear that the irregularities formed on the surface of the concrete skeleton are clogged with dust between the demolding and the formation of the mortar layer.

[0008]

EXAMPLES As shown in FIGS. 1 and 2, unevenness a,
The non-water-absorbing sheet 1 for molding uneven surface having b formed thereon is attached to the inner surface of the outer wall mold 2 in a state where the unevenness a and b are located inside the mold 2. A double-sided pressure-sensitive adhesive tape or an adhesive may be used to attach the non-water-absorbent sheet 1 to the form 2, but the legs may be easily separated between the non-water-absorbent sheet 1 and the form 2 during demolding. It is desirable to use a short tacker (stapler), nails with washers, etc.

As shown in FIG. 3, concrete 3 for walls is placed in the mold 2. Then, when the concrete 3 develops a certain amount of strength, as shown in FIG. 4, the form 2 is removed with the non-water-absorbent sheet 1 left, and is diverted to another place. In this case, if the non-water absorptive sheet 1 is attached to the mold 2 by a tacker or a washer-attached nail, the legs of the tacker and the washer-attached nail easily come out of the form 2 at the time of releasing the die, The frame 2 and the non-water absorbent sheet 1 are easily separated. By continuing this state until just before the construction of the mortar layer, the non-water-absorbent sheet 1 is used as a sheet for wet curing on the surface of the concrete skeleton.

Then, as shown in FIG. 5, the non-water-absorbent sheet 1 is removed at an appropriate time to form irregularities a'and b'corresponding to the irregularities a and b on the surface of the concrete skeleton. Thereafter, as shown by phantom lines in FIG. 5, the surface of the concrete skeleton is troweled with mortar or sprayed from a direction substantially perpendicular to the surface to form the mortar layer 4.

As the non-water-absorbent sheet 1 for molding the uneven surface, in addition to the solid shape as shown in the figure, as shown in FIG. 6, the flat sheet substrate 1a and the cross section have a square or trapezoidal shape. Resin sheet with hollow protrusions having a structure in which a flexible film 1b on which a large number of protrusions c are formed are laminated (same as that generally used as a cushioning material for packing easily scratched or fragile articles) ) May be used.

If this resin sheet is used, since the projection c has a hollow shape, as shown in FIG.
When the concrete is cast, the projection c is deformed into a thickened flat shape by receiving the lateral pressure of the concrete 3, and as shown in FIG. 9, a recess c ′ is formed on the surface of the concrete skeleton. Therefore, the engaging force with the mortar layer 4 can be further increased. The mold 2 and the resin sheet with hollow protrusions are removed in the order of the mold 2 and the resin sheet with hollow protrusions, as shown in FIG. 8, as in the previous embodiment.

[0013]

As described above, according to the present invention, the mold is removed while leaving the non-water-absorbent sheet for molding the uneven surface, so that the mold can be removed as soon as possible. While securing the transferability of the frame, the concrete skeleton is to be cured by the non-water-absorbent sheet, and during the period from the demolding to the formation of the mortar layer, the irregularities formed on the surface of the concrete skeleton are clogged with dust. Moreover, the hardening of the concrete skeleton progresses slowly, and the concrete quality can be secured.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a non-water-absorbent sheet for molding an uneven surface used in the present invention.

FIG. 2 is a vertical cross-sectional side view of an essential part for explaining a construction method of a concrete structure having unevenness on the surface according to the present invention.

FIG. 3 is an explanatory diagram of a construction procedure subsequent to FIG.

FIG. 4 is an explanatory diagram of a construction procedure subsequent to FIG.

FIG. 5 is an explanatory view of a construction procedure following FIG.

FIG. 6 is a vertical cross-sectional side view of essential parts showing another embodiment of the present invention.

FIG. 7 is an explanatory diagram of a construction procedure following FIG.

8 is an explanatory diagram of a construction procedure following FIG.

FIG. 9 is an explanatory diagram of a construction procedure subsequent to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Non-water-absorbent sheet for molding uneven surface 2 ... Formwork 3 ... Concrete a ', b' ... Unevenness

Claims (1)

Claim: What is claimed is: 1. Non-water-absorbent sheet for molding uneven surface is placed in the mold with the non-water-absorbent sheet attached to the inner surface of the mold. The formwork is removed with the sheet left, and thereafter, the non-water-absorbing sheet is removed to construct a concrete structure having unevenness on the surface.Construction of a concrete structure having unevenness on the surface. Law.