JPH028460A - Concrete form made of frp - Google Patents

Abstract

PURPOSE:To make building of a retaining wall easy by forming non-straight longitudinal edges, respectively curved inwardly and outwardly, for a form that reproduces natural-stone-inlaid surface, and by placing the said form with the recessed parts of the natural-stone-like shape settled within the form. CONSTITUTION:Selected natural stones, after being applied with release agent, are coated with fiberglass reinforced plastic (FRP) in prepreg state to an extent that approximately a half of each stone is covered, and a form is made thereby. Then molding agent is poured into the form and natural-stone-like half bodies 10 are made thereby. The half bodies 10 are placed in a suitable arrangement in a base form 11, whose longitudinal edges are respectively curved inwardly and outwardly. Release agent is then applied over the half bodies 10 and the bodies are further covered with FRP 8 in prepreg state. After hardening by heating under pressure, a form 2 is made. A plurality of the forms 2, with release agent applied thereupon, are erected at the fixed places, and between concrete panels placed at the fixed intervals, concrete is placed, and a concrete retaining wall is built thereby.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is a rigid concrete form made of FRP that can easily and economically construct a retaining wall that looks like a pile of natural stones embedded in it. .

[Conventional technology]

Conventionally, most retaining walls formed on mountain slopes on the road side or around houses have been simply plain walls with straight surfaces, and retaining walls that are aesthetically pleasing have not been adopted.

In other words, building a so-called castle-style retaining wall made of stacked natural stones was very expensive and labor-intensive, so in the end, they had no choice but to build a simple retaining wall with a straight surface.

Therefore, the applicant's affiliated company conducted research to see if it would be possible to construct a so-called castle-style retaining wall without requiring much expense or effort, and completed the idea disclosed in Utility Model Application No. 63-48697.

[Problem to be solved by the invention]

However, the example according to Utility Application No. 63-48697 is 1
The shapes of the two formworks are rectangular, and in order to create a natural feeling as much as possible, the natural stone-shaped recesses that reproduce natural stone are not properly housed in one formwork, but the natural stone-shaped recesses straddle the adjacent formworks. Therefore, when forming a concrete retaining wall that looks like it was formed by pouring concrete formwork and stacking natural stones in a state of being inserted, it is possible to fill the gaps between the formwork adjacent to the surface of the natural stone-shaped convex part of the completed concrete retaining wall. The concrete burr line that had flowed in was reproduced to some extent, which had the disadvantage of being unsightly and detracting from the natural stone feel.

In order to solve this drawback, in the embodiment according to Utility Model Application No. 63-48697, the silicone rubber layer on the surface of the mold is extended to the side of the mold to prevent the formation of paris lines. The inventor realized that this was still insufficient and completed the present invention.

[Means to solve the problem]

The configuration of the present invention will be described in detail with reference to the accompanying drawings.

The long edge 4a of the FRP stiff concrete formwork 2 has a convex edge 3a instead of a straight edge. This non-linear edge 4a is formed on a non-linear edge 4a having a
' has a shape in which the opposite long edge 5a is formed into a non-linear edge 6a' having a concave edge 19a that matches the non-linear edge 4a',
Most of the natural stone-shaped recesses 7 are disposed within this formwork 2.

[Examples and effects]

To explain based on an example, first, we go to the riverbank, select natural stones 1 of various shapes and sizes, apply a mold release agent to each one, and place the FRP board 8 in a prepreg state into natural stones. 1 and harden it under heat and pressure to form a mold 9.
(See Figure 1).

This mold 9 adopts a method in which unsaturated polyester resin is applied to approximately half of the natural stone 1, glass nonwoven fabric, woven fabric, or both are layered, this is repeated to laminate the FRP material, and the FRP material is hardened by using a hardening agent. You may do so.

A modeling material such as plaster or cement mortar may be poured into this mold 9, or a mold release agent for resin may be applied to the inner surface of this mold 9.
10 natural stone halves with unsaturated polyester resin layered inside
(See Figure 2).

A large number of natural stone halves 10 of different shapes and sizes made in this way are arranged and fixed to the base frame 11 in a state where all of the natural stone halves 10 are accommodated within the base frame 11, taking into consideration the combination and design. (See Figure 3).

This base frame 11 has a long edge 4a not in a straight line but a curved edge with one convex edge 3a, and a long edge 5a opposite to this curved edge has a concave edge 19a that matches the curved edge. It has a shape with a curved edge.

The product of the present invention is manufactured by applying a mold release agent to the surface of the base frame 11 on which the natural stone halves 10 are placed and fixed, covering the FRP board 8 in a prepreg state, and hardening it under heat and pressure. This process may be repeated by applying unsaturated polyester resin, layering it with glass nonwoven fabric, or both, to laminate the FRP material, and curing it using a curing agent (see Figure 4).

A mold release agent or silicone rubber is applied to the surface of the thus completed product of the present invention to improve mold release, and then concrete is poured.

When the product of the present invention is removed after the concrete has hardened, a concrete block having an uneven surface that reproduces the unevenness of a retaining wall made of stacked natural stones 1 as shown in FIG. 6 is obtained.

In advance, a plurality of formworks 2 according to the present invention are joined together with bolts or the like and erected at a predetermined position, concrete panel plates 13 are erected with a desired gap in between, and concrete is poured into the desired gap. A concrete retaining wall will be formed that looks like natural stones stacked together with the desired gap width (see Figure 5).

In addition, mold release agents and silicone rubber are used to improve mold release.
It is desirable to extend the coating to the side of the formwork 2 of the product of the present invention because it prevents concrete from flowing into the joints of adjacently joined products of the present invention and forming paris lines. Also,
In order to make the concrete retaining wall formed by the product of the present invention look more like natural stone, it is preferable to mix inorganic pigments and weathering preventive agents into the inflowing concrete to retain the color of natural stone.

Fig. 7.8 shows a case in which the products of the present invention are installed in series, and will be described in detail below.

In FIG. 7, the long edge 4a is formed into a curved edge with a convex edge 3a, and the opposite long edge 5a has a concave edge 19 that matches the curved edge.
The basic formwork A is formed into a curved edge having a curved edge a, and the short edges 13a on both sides are formed into a straight edge.
A convex edge 151 which matches the curved edge of the basic formwork A is formed on the opposite long edge 16 and short edges 171 on both sides. A corner form B with a straight edge is placed in series on the lowest level, and the corner form B is divided into 7 pieces on the top level, and 7 corner forms C and D are placed in series to form a rectangular shape. A case where a frame is formed is illustrated.

FIG. 8 also shows that the continuous convex edge 18a formed by the two basic forms A is formed by moving the basic form A laterally by a length Σ of the long side length of the basic form A. The basic formwork A on the upper tier is installed in a row so as to match the concave edge 19a of the basic formwork A on both sides of the upper tier basic formwork A! A basic formwork E divided into T is installed in series, a corner formwork B and two 7 corner formworks C and D are installed in a row at the bottom, and two corner formworks B are installed at the top. The figure shows a case in which a rectangular formwork is formed by arranging them in series.

As shown in Fig. 7.8, the basic formwork A according to the product of the present invention.

/ / By combining corner form B, Σ corner form C, D, and Σ basic form E, it is possible to freely create a rectangular form of any size.

In addition, the drawings are basic formwork A, corner formwork B, and Z corner form! Frames C, D, 2-Although the short side edges of the basic formwork E are illustrated as straight edges, the short side edges may be formed as curved edges.

Figures 9 and 10 illustrate another example of the basic formwork A in which straight convex edges 3a and concave edges 19a are formed on the long edge 4a and the opposite long edge 5a.

[Effect of idea]

As described above, the present invention has a structure having natural stone-shaped recesses in which natural stones are piled up, so that natural stones can be formed by simply forming a retaining wall using the product of the present invention without stacking natural stones. A retaining wall with a shape similar to that of a retaining wall that is stacked in a fitted state can be easily and economically produced.

In addition, since the present invention uses FRP boards to form an uneven surface, any shape of natural stone can be clearly molded into the exact shape, and the concrete is not disposable but can be used repeatedly and durablely. It becomes the formwork.

Furthermore, since the uneven surface of the present invention can be continuously extended vertically and horizontally, by selecting an arbitrary number of consecutively installed stones of the present invention according to the size of the construction site, natural stone can be extended vertically and horizontally. It is also possible to manufacture large retaining walls that extend continuously in a stacked state.

Further, in the present invention, the long edge is not a straight edge but a non-linear edge having a convex edge, and the opposite long edge of the non-linear edge is formed as a non-linear edge having a concave edge that coincides with the non-straight edge. Since most of the natural stone-shaped recesses are arranged in this formwork, when a plurality of stones of the present invention are installed in a row, the previous application (
Compared to the rectangular formwork according to Utility Model Application No. 63-48697), the natural stone-shaped recesses are arranged in a more natural state, and the paris lines that occur when concrete is poured are also placed on the surface of the natural stone-shaped convex parts. The concrete formwork made of FRP exhibits excellent effects, such as being able to provide a concrete retaining wall that looks more natural and has a very good appearance because it does not appear and only appears at the joints of each block.

[Brief explanation of the drawing]

Figures 1, 2, 3, and 4 are explanatory sectional views illustrating an example of the manufacturing process of the product of the present invention, and Figure 5 is a diagram showing the process of manufacturing a retaining wall on site using the product of the present invention. FIG. 6 is a perspective view showing an example of a concrete block molded using the product of the present invention, and FIGS. 7 and 8 are explanatory front views of the product of the present invention arranged in series. , FIG. 9.10 is a front view of another example of the product of the present invention. 1... Natural stone, 2... FRP stiff concrete formwork a... convex edge, 4a... long edge, 4a/... non-linear edge, 5a... opposite long edge, 6 a'...Non-linear edge, 7... Natural stone shaped recess, 19 a... Concave edge. June 25, 1988 Applicant Nippon Brahuohm Co., Ltd. Designer Yoshi
Nora Heido Kaneko Jun Agent Yoshii Akie

Claims (1)

[Claims] The shape of the FRP concrete formwork 2, which has an uneven surface on the formwork surface that reproduces the unevenness of a retaining wall stacked with natural stones 1 inset, has a long edge 4a with a convex edge 3a instead of a straight edge. The non-linear edge 4a' is formed with a non-linear edge 4a'
The long edge 5a opposite to a' is formed into a non-linear edge 6a having a concave edge 19a that matches the non-linear edge 4a', and is arranged so that most of the natural stone-shaped concave portions are accommodated within this formwork 2. FRP concrete formwork is characterized by the fact that