JP3339050B2 - Concrete molding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to the mold method of concrete to reduce the thickness of the concrete formwork.

[0002]

2. Description of the Related Art Conventionally, a concrete product is formed by filling concrete inside a concrete formwork, curing the concrete, and removing the concrete from the mold. Such a concrete form is generally a solid structure formed of steel plates.Especially when molding a relatively large-sized concrete product, the concrete form is deformed by deformation or warping due to the internal pressure of the filled concrete. A thick steel plate is used so as not to cause cracks. For this reason, the concrete formwork is heavy and it is inconvenient to handle when carrying or opening and closing the concrete formwork, and the work of assembling the concrete formwork is also troublesome,
The cost was high.

[0003] The invention, together with thinner and simplifying the concrete form in intended to solve such problems, to provide a molding how concrete can prevent deformation of the concrete formwork The purpose is to:

[0004]

According to a first aspect of the present invention, there is provided a method for molding concrete, wherein concrete filled in a concrete crete mold formed into a predetermined shape is hardened to form a concrete product. In the method of molding concrete, an outer frame for accommodating the concrete form is provided.
Substantially concrete <br/> you want to fill in the concrete form in the outer frame and have a substantially same specific gravity, and its concrete
After filling with the same amount of fluid filler,
With the concrete formwork placed, this concrete
By filling the formwork with concrete,
The concrete form was surrounded by the filler filled in the space formed between the concrete form and the outer form until the cleat form was settled and the concrete in the concrete form hardened at least. Things.

[0005] With the above configuration, at the time of molding a concrete product, a filler having substantially the same specific gravity as the concrete product to be molded outside the mold is filled, and the inside of the outer frame is previously filled.
Place the formwork on the filled filler and fill the form with the filler.
By filling the form with concrete, the form
Form sinks according to the weight of concrete filled inside
And, always concrete of internal pressure and external pressure is approximately equal,
The deformation of the concrete formwork during molding of the concrete product is suppressed.

According to a second aspect of the present invention, there is provided the concrete molding method according to the first aspect of the present invention, wherein the filling material has a hardening rate lower than that of the concrete filled in the concrete form. Since the concrete surrounding the concrete form has a lower curing speed than the concrete in the concrete form, even if the concrete in the form hardens, the concrete in the outer form does not harden and becomes a paste. It is. Therefore, when molding the concrete product,
Since the concrete having the same specific gravity is filled inside and outside the formwork, the internal pressure and the external pressure of these concretes are equalized, so that the deformation of the concrete formwork during molding of the concrete product is suppressed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, 1
Is a concrete form (hereinafter, simply referred to as a form) for molding a concrete product S such as a concrete block. In this embodiment, the form is a bottomed box having a bottom 2 and a side 3 and an open top.

Reference numeral 5 denotes an outer frame for accommodating the inner frame 1, similarly to the inner frame 1, a bottomed box type having a bottom plate 6 and a side plate 7 erected on the periphery of the bottom plate 6 and having an open top. Is formed.

A method of forming the concrete product S of the present embodiment configured as described above will be described. At the time of molding the concrete product S, the inside of the mold 1 is filled with concrete K, and a space 8 formed between the mold 1 and the outer frame 5 is filled with a filler inside the mold 1. Is filled with concrete K1. It is desirable that the amount of concrete to be filled into the space 8 and the formwork 1 be substantially the same. Also, concrete K, K filled in the form 1 and the space 8
The specific gravity of the concrete 1 is approximately 2.3, which is the same, but the concrete K1 in the space 8 is hardened faster than the concrete K in the form 1 by changing the mixing ratio of the hardener of the concrete K and K1. Is slow. For this reason, even if the concrete K in the mold 1 hardens, the concrete K1 in the space 8 does not harden and is in a paste state. Therefore, at the time of molding the concrete product S, since the concretes K, K1 having the same specific gravity are filled inside and outside the formwork 1, the internal pressure and the external pressure of these concretes K, K1 become equal. Therefore, even if the form 1 is thinned, the concrete K
Does not deform the mold 1. When molding the concrete K, as shown in FIG. 2A, the mold 1 is placed on the concrete K1 previously filled in the outer frame 5 and the concrete K is filled in the mold 1. Accordingly, as shown in FIG. 2B, the form 1 may be lowered onto the concrete K and the form 1 may be placed on the outer frame 5. Thus, if the outer frame 5 is previously filled with the concrete K1 and then the mold 1 is arranged inside the outer frame 5 and the concrete 1 is filled with the concrete K, the outer frame 5 and the mold 1 can be filled. The work of filling the concrete K and K1 is easy. That is, when concrete K and K1 are filled in the space 8 and the form 1 of the outer frame 5 and the form 1 with the form 1 disposed inside the outer form 5, the space 8 and the form 1 must be filled with concretes K and K1 having different curing speeds. If either one of them has a large amount of filling, there is a risk that the pressure balance between the inside and outside of the form 1 is lost and the form 1 is deformed. However, if the mold 1 is placed on the concrete K1 previously filled into the outer frame 5 and the concrete K is filled into the mold 1, the concrete 1 according to the weight of the concrete K filled in the mold 1 is filled. As a result, the mold 1 sinks, and the balance between the internal pressure and the external pressure of the mold 1 can be always maintained.

When the concrete K in the mold 1 hardens and is released from the mold, the concrete K1 surrounding the mold 1 has a hardening speed lower than that of the concrete K in the mold 1. In a state where the concrete K in the inside is hardened, the concrete K1 in the space portion 8 is in a state where it is not hardened. For this reason, after the paste-like concrete K in the mold 1 is hardened, the concrete 1 is formed by lifting the mold 1 and removing the concrete K from the mold 1. Thereafter, the paste-like concrete K1 is extracted from the outer frame 5, and the molding of the concrete product S is completed.

As described above, in the present embodiment, the pasty concrete K1 having a hardening rate lower than that of the concrete K filling the mold 1 is filled outside the mold 1 for molding the concrete product S. By hardening the concrete in the mold 1 while surrounding the mold 1 with the paste-like concrete K1, the balance between the internal pressure and the external pressure of the mold 1 can be maintained. For this reason, even if the form 1 is made thin, the form 1 is not deformed by the internal pressure of the concrete K filled in the form 1.

The outer frame 5 filled with the paste-like concrete K1 is required to have high strength, but the outer frame 5 may have a box-like shape for simply accommodating the form frame 1. On the other hand, the mold 1 for molding the concrete product S needs to be formed into a shape corresponding to the shape of the product. However, since it is not necessary to have a strong structure in terms of strength, for example, the concrete mold 1 may be made of synthetic resin. The product S can be molded, and the concrete form 1 can be mass-produced at low cost. Furthermore, the outer frame 5, although strength high strength is required, because it is sufficient to accommodate a concrete form 1 in accordance with the concrete product S in the outer frame 5, can the outer frame 5 in common, It is possible to use the common outer frame 5 for different concrete products S.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the shapes, structures, and the like of the mold and the outer frame are not limited to the above-described embodiment, and may be appropriately selected. Further, in the above-described embodiment, the paste-like concrete K1 filled in the space 8 is illustrated as an example in which the form 1 is extracted and then extracted from the form 1. However, the form 1 is provided with a discharge port that can be opened and closed. , May be discharged from the outlet. Further, after a mold corresponding to the shape of the concrete product S is arranged in the outer frame 5, the space 8 is filled with concrete K1, the concrete K1 is hardened, and the mold is released from the mold. Can be used as a mold for the concrete product S. In this case, if concrete K is filled in a mold formed of concrete K1 in a state where a releasing agent or the like is applied to the inner surface side of concrete K1, after concrete K is hardened, it is easily released from concrete K1. be able to.

Further, in the above-described embodiment, the paste-like concrete has been described as an example of the filler to be filled in the outer frame. However, for example, the specific gravity is almost the same as concrete such as epoxy resin having a specific gravity of 2.2. Any fluid may be used.

[0015]

According to the concrete molding method of the first aspect of the present invention, concrete filled in a concrete form formed into a predetermined shape is hardened to form a concrete product. in the method of molding, before
The outer frame that houses the serial concrete form provided, have a substantially same specific gravity as the concrete is filled into the outer frame in <br/> the concrete form within, and substantially the same amount of flow <br/> and its concrete After filling the solid filler, the condensate is placed on this filler.
With the REIT formwork placed on the concrete formwork,
By filling concrete, the concrete
Before the mold in the filling material filled in a space portion formed between said concrete form and the outer frame to the concrete of at least the concrete form frame by precipitation hardened
Since the concrete form is surrounded, it is possible to prevent deformation of the concrete form during molding of the concrete product.

According to the concrete molding method of the second aspect of the present invention, in the concrete molding method of the first aspect, the setting rate of the filler is lower than that of the concrete filled in the concrete form. Since the concrete is a paste, the molding operation of the concrete can be simplified by configuring the filler surrounding the concrete product with the same concrete as the concrete product.

[Brief description of the drawings]

FIG. 1 is a sectional view of a mold showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a molding state of the concrete, in which FIG. 2 (a) shows a state in the middle of molding, and FIG. 2 (b) shows a state after molding.

[Explanation of symbols]

 1 Formwork 5 Outer frame 8 Space K Concrete K1 Paste concrete (filling material)

Claims (2)

(57) [Claims] 1. A method of molding concrete for molding the concrete products by curing a concrete filled into the concrete formwork which is formed into a predetermined shape, said con
The outer frame is provided to accommodate the cleat mold, after said possess approximately the same specific gravity as the concrete to be filled in the concrete form in and filled with nearly the same amount of fluid-like filler and the concrete in this outer frame The concrete on this filler
While the formwork is placed on the concrete formwork,
The concrete formwork by filling
Wherein in the filling material filled in a space portion formed between said concrete form and the outer frame to the concrete at least within the concrete form by precipitation hardened con
A method of molding concrete, comprising surrounding a cleat form . 2. The concrete molding method according to claim 1, wherein said filler is a paste-like concrete whose curing speed is lower than that of the concrete filled in said concrete formwork.