JP2003268976A - Net heater for curing concrete and concrete curing method using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the deterioration of quality while promoting the curing of concrete by obviating the freezing of placed concrete in winter, and to shorten a construction cycle. <P>SOLUTION: A net heater 11 for curing concrete in which a plurality of rows of electric floor-heating wires 13 controlled at a fixed temperature are disposed within the fixed range of a net 12 by using a fixing means is provided while a concrete curing method using the net heater curing concrete by installing the net heater 11 between placing-stop forms and a concrete panel is provided. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete curing net heater and a concrete curing method using the net heater. In particular, in concrete construction using a stop formwork in winter, The present invention relates to a concrete curing net heater for preventing freezing of concrete before solidification and a concrete curing method using the net heater.

[0002]

2. Description of the Related Art Conventionally, in winter concrete pouring work, water freezes before the concrete is solidified, and the concrete that is driven into is not completely solidified, or it becomes a so-called "screw-like" sponge. Therefore, it was necessary to incubate the entire part of the concrete for a certain period of time to cure it, because of poor construction.

Therefore, for curing after pouring concrete, temporary columns are erected around the pouring concrete, a sheet is supported by the columns, and the pouring concrete is covered with the sheet, and a petroleum stove in the sheet. Burns briquette and briquette to keep the placed concrete warm.

However, with this method, there is a risk of fire, and even if the vicinity of the combustion equipment can be kept warm, it is difficult to keep the whole warm evenly. There was a problem that a difference was created and a crack caused by this was generated. Also, a concrete panel with a heater embedded is commercially available. However, with this method, if the concrete panel is damaged during the cologne work of the concrete panel after deframing (the work of peeling off the stuck concrete with a brush, a hammer, and high-pressure water) and the number of diversions exceeds 10 times, the heater built The whole panel will have to be replaced and it will be expensive.

Further, FIG. 4A shows a conventional concrete curing net heater 1 for solving the above-mentioned problems.
In the net heater 1 for concrete curing, the flexible edge member 2 is formed into a rectangular shape, the synthetic fiber filaments 3, 3 ... One cord heater 4 which is continuous every other lateral direction of the filaments 3, 3 ... Is braided, and further, the input end 4a of the cord heater 4 is extended outward and the cord heater 4 is also provided. Four
Is connected to the synthetic fiber filaments 3, 3 ..., and the four-sided edges of the synthetic fiber filaments 3, 3 ... are locked to the edge members 2, 2 ... It is braided.

The input end 4a is connected to the connector 5
Is connected to the power cord 6 via the, and the power cord 6 is connected to the plug 7. Further, the cross section of the cord heater 4 has two heating wires 4 as shown in FIG.
c and 4c are covered with silicone rubbers 4d and 4d, a silicone rubber layer 4e and a glass fiber woven cloth 4f, and further protected with a stainless blade 4g.
Then, as shown in FIG. 3C, the exothermic wire 4c is folded back into a U shape at the end portion 4b and accommodated therein.

Then, the concrete curing net heater 1 is laid on the cast concrete, the sheet (not shown) is coated on the concrete curing net heater 1, and then the plug 7 is not shown. When connected to a power source, the heating wire 4c generates heat, heats and cures the placed concrete.

[0008]

SUMMARY OF THE INVENTION The above conventional curing of cast concrete is performed by standing a temporary column around the cast concrete and covering it with a sheet, and burning a petroleum stove or briquette to burn the concrete. Although this method keeps the heat, there is a risk that a fire may occur in this method, and it is difficult to keep the whole temperature uniform, and there is a problem that cracks are generated in the concrete due to the uneven heat retention.

Also, a concrete panel having a heater embedded therein is commercially available, but in this method, the concrete panel is damaged in the cologne work of the concrete panel after deframed. You have to replace the entire panel, which is expensive.

Further, a method of using a net heater for concrete curing is to lay a net heater for concrete curing on cast concrete, coat a sheet from above, and then heat the concrete heater for concrete curing to cast concrete. The concrete heating net heater is laid so as to directly contact the surface of the cast concrete, so that the concrete heating net heater needs to be installed after waiting for a certain degree of solidification of the concrete. Therefore, there is a problem that the curing of the concrete cannot be promoted because the heat cannot be kept immediately after the concrete is poured.

Therefore, technical problems to be solved in order to prevent freezing of cast concrete in winter and prevent deterioration of quality, to promote curing of concrete, and to shorten construction cycle occur. The present invention aims to solve this problem.

[0012]

DISCLOSURE OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and an electric hotbed line controlled to a predetermined temperature in a predetermined range of a net is arranged in a plurality of rows by using fixing means. The concrete curing net heater and the electric heating floor wire whose temperature is controlled to a predetermined temperature within a predetermined range of the net are arranged in a plurality of rows using a fixing means to form a concrete curing net heater, and the concrete curing net heater is used. A concrete curing method using a net heater for concrete curing, in which a net heater is installed between a stop formwork and a concrete panel to cure concrete.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to FIGS. In FIG. 1, reference numeral 11 denotes a concrete curing net heater, and the concrete curing net heater 11 includes a single electric hotbed wire 13 over substantially the entire surface of a commercially available flexible net 12 made of polyethylene.
Is bent and arranged in a plurality of rows and fixed.

The electric hotbed wire 13 has an output of, for example, 25 W / m.
The electric hotbed wire 13 is arranged so as to have a temperature of about 200 W / m ^2, and is controlled to a predetermined temperature by a bimetal or the like.
Two heating wires (not shown) folded back at the end portion 13a of the electric hotbed are accommodated, and one end of the electric hotbed wire 13 is extended from the net 12 and has a plug 14 at the tip.
Is provided.

In FIG. 2, the electric hotbed wire 1 is connected to the net 12.
The method of mounting the electric hotbed wire 13,
13 together with the net 12 into glass fibers 15, 15 ...
And the electric hotbed wires 13, 13 ... And the net 12
Are fixed by using the plastic binding bands 16, 16 ... As the fixing means.

Accordingly, the concrete curing net heater 11 can be produced relatively easily and inexpensively, and since it is a lightweight and flexible net, it is easy to carry and various It is possible to install in the place. Then, as shown in FIG. 3, the concrete curing net heater 11 in which the electric hotbed wires 13, 13 ... Are attached to the net 12 is used as an iron stopping formwork 17 and wooden concrete panel before concrete is placed. Install between 18.

Then, after the concrete C is placed on the side of the concrete panel 18 and the concrete curing net heater 11 is energized, the heat of the concrete curing net heater 11 keeps the concrete C warm and cures. You can

As a result, the temperature of the concrete C can be maintained and cured immediately after placing the concrete C without directly contacting the concrete C, and the concrete C can be frozen in the winter.
And, it is possible to prevent the deterioration of quality, and at the same time secure the integrated temperature necessary for curing the concrete C at an early stage,
Curing can be promoted, the mold can be demolded at an early stage, and the construction cycle can be shortened. Further, in the curing method, if the concrete panel 18 is damaged by the cologne work, only the concrete panel 18 needs to be replaced, and the concrete curing net heater 11 can be diverted many times, which is economical.

Although not shown, the concrete curing net heater 11 may be used, for example, in addition to the above-described method of use, for example, waiting for a certain solidification of the cast concrete to be applied to the surface of the concrete curing net heater. It is also possible to extend 11 to keep the surface of the concrete warm and to cure it.

Furthermore, it is also possible to spread the above-mentioned concrete curing net heater 11 on the surface of the concrete which has been cleaned before pouring to splice the concrete, thereby preventing freezing and curing. The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.

[0021]

As described in detail in the above-mentioned one embodiment, the invention according to claim 1 has a plurality of rows of electric hotbed wires controlled to a predetermined temperature in a predetermined range of the net by using a fixing means. Since it is a concrete curing net heater arranged in, the concrete curing net heater can be produced relatively easily and inexpensively, and is lightweight,
Moreover, since it is a flexible net, it is easy to carry and can be installed in various places.

According to a second aspect of the present invention, an electric hotbed wire whose temperature is controlled to a predetermined temperature in a predetermined range of the net is arranged in a plurality of rows by using a fixing means to form a net heater for concrete curing, and the concrete curing is performed. A concrete net heater is installed between the stop formwork and the concrete panel to cure the concrete, so it can be heated and cured immediately after placing the concrete without directly contacting it. It is possible to prevent the deterioration of quality, promote the curing of concrete, accelerate the demolding of the mold, and shorten the construction cycle. Further, in the curing method, when the concrete panel is damaged in the cologne work, only the concrete panel needs to be replaced, and the concrete curing net heater can be diverted any number of times and is economical. It is an invention that produces a great effect.

[Brief description of drawings]

FIG. 1 is a front view of a concrete curing net heater showing an embodiment of the present invention.

FIG. 2 is a partially enlarged front view showing a state in which an electric hotbed wire is attached to the net shown in FIG.

FIG. 3 is a front vertical cross-sectional view showing a state in which a net heater for concrete curing is attached between a stop formwork and a concrete panel.

FIG. 4 (a) is a front view of a concrete curing net heater showing a conventional example. (B) The side surface longitudinal cross-sectional view of the cord heater shown in FIG. 4C is a front vertical cross-sectional view of the end portion of the cord heater shown in FIG.

[Explanation of symbols]

11 Net heater for concrete curing 12 net 13 Electric hotbed line 17 Stop Form 18 concrete panels

Continued front page    F-term (reference) 2E172 EA03 EA06                 3K034 AA02 AA12 BA08 BA10 BA12                       BB02 BB05 BB08 BB10 BB12                       BC02 BC14 CA32 GA06 HA09                       JA09                 4G012 RA08 RC01

Claims (2)

[Claims] 1. A net heater for concrete curing, characterized in that an electric hotbed wire whose temperature is controlled within a predetermined range of a net is arranged in a plurality of rows by using a fixing means. 2. A concrete curing net heater is formed by arranging electric hotbed wires controlled to a predetermined temperature in a predetermined range of a net in a plurality of rows by using fixing means, and the concrete curing net heater is stopped. A concrete curing method using a net heater for concrete curing, which is installed between a frame and a concrete panel to cure the concrete.