JPH07102771A - Cleaning method of concrete - Google Patents

Abstract

PURPOSE:To control a temperature rise of concrete efficiently by uniformly forming a flow path for a refrigerant extending over the whole in forms without requiring complicated operation. CONSTITUTION:Hollow sectional separators are used as separators 11 which have been employed as form bearing members, and each separator 11 is communicated on the outside of a frame board 20, thus forming a flow path for a refrigerant flowing extending over the whole forms 10. That is, the end sections of the separators 11 projected from the frame board 20 are communicated by using communicating tubes 15 such as rubber hoses on the outside of the frame board 20. The refrigerant is flowed into the flow path formed by such separators 11, thus cooling placed concrete.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete cooling method for cooling concrete which is placed in a mold and is being heated by hardening.

[0002]

2. Description of the Related Art Conventionally, for example, a pipe cooling method has been used for the purpose of suppressing the temperature rise of concrete during curing in order to prevent cracking of concrete caused by a temperature difference caused by a temperature rise during curing and a temperature drop thereafter. Has been adopted. In this method, before placing concrete in the formwork, a cooling pipe network is arranged in advance in the formwork, and a cooling medium such as cold water is circulated through the pipe network to obtain a cooling medium. It is intended to suppress the temperature rise of concrete during hardening by heat exchange.

[0003]

However, in the above-described conventional pipe cooling method, the work of arranging the piping network is complicated, and particularly when constructing a wall-shaped concrete structure, it is arranged in the formwork. The position of the piping network is restricted due to the interaction with the reinforcing bars and other metal objects, so it becomes difficult to install the piping network evenly throughout the formwork, and the temperature rise of concrete is efficiently suppressed. There was a problem that I could not do it.

Therefore, the present invention has been made in view of the above-mentioned problems, and the flow passages for the cooling medium are formed evenly throughout the mold without any complicated work, thereby efficiently producing concrete. It is an object to provide a concrete cooling method capable of suppressing a temperature rise.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned object, and its gist is to provide a concrete cooling method for cooling concrete which is placed in a mold and is undergoing hardening heat generation. In, using a separator having a hollow cross section as a separator as a mold support member that is installed in a large number in the mold, by circulating a cooling medium such as cold water in the hollow separator that is installed in a large number, the cast concrete It is a concrete cooling method characterized by cooling.

[0006]

According to the concrete cooling method of the present invention, it has been conventionally used as a form supporting member when assembling the form, and is placed by using a large number of separators evenly installed over the entire form. Cool the concrete. That is, without providing a separate cooling pipe network inside the mold, the separators are connected to each other outside the mold, or the separators are connected to the cooling medium supply pipes. The cooling medium flow passages are evenly formed through the separators. Therefore, by supplying the cooling medium to the flow passages, the temperature rise of the concrete can be efficiently suppressed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. The concrete cooling method according to the present embodiment is used, for example, when constructing a wall-shaped concrete structure. As shown in FIG.
As a form supporting member for keeping the space between the frame plates 20, 20, separators 11 which are evenly installed over the entire form are used as they are to cool concrete.

That is, the separator 11 is provided on the outer surface of the frame plates 20 or 20 in order to prevent the space between the frame plates 20 and 20 from expanding due to the lateral pressure due to the weight of concrete cast in the formwork 10, for example. A suitable design, for example, 50 cm, is provided to prevent the space between the frame plates 20 and 20 from being narrowed by tightening a mold fixing member (not shown) such as a vertical end and a lateral end. A space of 100 cm or the like is provided so as to penetrate the frame plates 20 and 20 while avoiding the disposition position of reinforcing bars and the like (not shown) arranged in the mold 10, and to make the entire form 10 horizontal. A large number are evenly arranged in rows in the vertical and vertical directions.

In this embodiment, as shown in FIG. 2, the separators 11 having a hollow cross section are used, and the separators 11 are communicated with each other through the communication pipes 15 and the like outside the frame plate 20. The separator 1
In the inside of the mold 10, 1 forms a flow path of a cooling medium that flows over the whole of the mold 10. That is, as shown in FIG. 2, each separator 11 has a male screw portion 11a formed at the end thereof, and the male screw portion 11a has a length larger than the sum of the thickness of the frame plate 20 and the thickness of the nut 13. It is provided in a long range and therefore each separator 1
In the state where each end of the separator 11 is fixed to the frame plate 20 by inserting the end of the separator 1 into the mounting hole 12 formed in the frame plate 20 and tightening the nuts 13 into the mounting hole 12, the end of the separator 11 is attached to the nut 13.
Further out from. Then, the hollow elbows 14 are screwed into the protrusions, and the adjacent hollow elbows 14 are connected to each other by a communication pipe 15 such as a rubber hose, so that the separators 11 communicate with each other, thereby forming the flow passage.

That is, the mold 1 is formed by a simple operation of connecting the separators 11 outside the frame plate 20.
A cooling medium flow passage is easily formed across the inside of the mold 10 over the entire 0.

It is not always necessary for all the separators 11 to be connected as one flow path at the same time in the flow path by the separators 11. For example, the entire formwork is divided into several blocks, and a distribution network is provided for each block. It may be formed, and a pipe for supplying the cooling medium may be connected to each separator 11.

Further, in FIGS. 1 and 2, reference numeral 16 denotes a so-called cone, which is attached to the end of the separator 11 so as to abut against the inner surface of the frame plate 20 and bites inward of the frame plate 20. This is to prevent the space between the frame plates 20, 20 from being narrowed by pressing. In this embodiment, the separator 1 including the cone 16 is also included.
However, if it is not necessary to consider the inward cutting of the frame plate 20, the cone 16 does not necessarily have to be attached, and the end of the separator 11 may be the cone 1.
It is also possible to directly project to the outside of the frame plate 20 without going through 6. When another form supporting member such as a foam tie is further attached to the end of the separator 11,
The present invention can be easily applied by using a hollow section for these members and connecting the piping for supplying the cooling medium to them.

In order to cool the concrete by means of the cooling medium flow passage formed by using the separator 11, a pipe for supplying a cooling medium such as cold water or cooling gas is connected to the end of the flow passage, and concrete is poured. A cooling medium is circulated in the flow passage before installation or after placing concrete. That is, the concrete that is being hardened has its temperature rise suppressed by heat exchange with the cooling medium through the outer periphery of the separator 11, and the separator 11 is evenly arranged over the entire form 10.
The concrete is efficiently cooled by such a cooling medium.

In this embodiment, both sides of the frame plate 20,
Although the case of constructing a wall-shaped concrete structure by placing concrete in a portion sandwiched by 20 has been described, the present invention, as shown in FIG. 3, one of the concrete skeletons 21 is already constructed and the other is a frame. It can be easily applied to the case of constructing a wall-shaped concrete structure using the form 22 formed by the plate 20. That is, according to such a form 22, the separator 2 fixed to the body 21 via the anchor 23 and the fixing jig 30.
In the end portion of the No. 4 on the side of the skeleton 21, although the skeleton 21 is an obstacle and cannot connect the adjacent separators 24 to each other, it is easy to use a separator having a double hollow section as the separator 24. The present invention can be applied to. Here, the separator 24 having the double hollow cross-section has, for example, an inner pipe 26 inside an outer pipe 25.
Are inserted and installed while maintaining these intervals by a spacer 27, and they are communicated with each other at the tip end on the side of the frame 21 and also with pipes 28 for supplying or discharging a cooling medium to each end at the side of the frame plate 20. It was done.
In addition to the separator 24 having the double hollow section, a so-called double pipe-shaped separator, which is formed of two rows of hollow separators that extend in close contact in parallel and communicate with each other at the front end of the body 21, is used as a cooling medium. You can also make a round trip.

In the above embodiment, the case of constructing a wall-shaped concrete structure has been described, but the present invention is not limited to such a structure, and a separator is used to cast concrete. It can be applied to any framed structure.

[0016]

As described above, according to the concrete cooling method of the present invention, concrete cooling is performed while using a large number of separators, which are installed in the mold as frame supporting members, as the cooling medium flow passages. So
The cooling medium flow passage can be installed in the mold without requiring complicated work, and the temperature rise of concrete can be efficiently suppressed by the cooling medium flow passage by the separators evenly arranged over the entire mold. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment in which a cooling medium flow path is formed using a separator.

FIG. 2 is an explanatory diagram showing a mounting state of a hollow separator.

FIG. 3 is an explanatory diagram showing an example of using a formwork formed by a concrete skeleton and a frame plate.

[Explanation of symbols]

 10 Formwork 11 Separator 15 Communication Tube 20 Frame Plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inori Noritake Takeda 4-640 Shimo-Seido, Kiyose-shi, Tokyo Inside Obayashi Technical Research Institute Co., Ltd. (72) Inventor Masami Kurihara 4-640 Shimoseido, Kiyose-shi, Tokyo Obayashi Corporation Technical Research Institute Co., Ltd.

Claims (1)

[Claims] 1. A method for cooling concrete, which is cast in a mold to cool concrete that is undergoing heat generation during hardening, wherein a separator having a hollow cross section is used as a separator as a frame supporting member that is installed in a large number in the mold. A method for cooling concrete, which comprises using and cooling a poured concrete by circulating a cooling medium such as cold water in a large number of installed hollow separators.