KR20110058935A - Reduction device of concrete temperature gap, reduction method using the device and structure using the method - Google Patents

Abstract

PURPOSE: A reduction method of a concrete temperature difference, the reduction device, and a structure cured by the reduction method are provided to cut down on the cost by simplifying equipment for reducing the temperature cracks in concrete, to control temperature exactly and to improve constructability. CONSTITUTION: A reduction device for a concrete temperature difference contains: a hose(300) installed to the outer surface(20) of a caisson and provided with plural holes(310), and connected to a water tank by an injection pipe; a curing blanket(200) covering the outer surface of the caisson and absorbing a portion of water(40) discharged from the holes of the hose; a heat insulating member(210) putting on the curing blanket and keeping the temperature of water; and a water tank stored with water.

Description

Reduction device of concrete temperature gap, reduction method using the device and structure using the method

The present invention relates to a method for reducing cracks caused by temperature differences generated during curing of a structure formed by poured concrete, an apparatus for reducing temperature cracks, and a structure cured for the method. More specifically, the water stored in the water tank is heated by a heating means, and the heated water flows through the front surface of the outer surface by a hose forming a hole to raise the outer surface temperature to reduce the temperature difference between the inner and outer surfaces of the caisson. To an apparatus and a method for causing the

Concrete cures concrete mixtures of cement, sand, gravel, and water, and is used as an important material in civil engineering or building structures because it resists natural winds such as water, fire, and earthquakes.

Such concrete is produced in a batch plant and transported to a concrete truck called a ready-mixed concrete, which is then poured into a concrete structure to be compacted and cured. The batch plant kneads the concrete every time by weighing the amount of concrete dough into a mixer, discharging the fully kneaded concrete, and then adding new concrete dough.

The poured concrete (caisson in the specific embodiment) is accompanied by hydration when it is cured, because hydration is a phenomenon in which solute molecules or ions attract several water molecules around them to form a molecular group. Hydration heat is generated in the process of forming one molecular group.

The heat of hydration raises the internal temperature of the caisson, and as a result, the internal and external temperature difference of the caisson is generated, causing the temperature crack. Such temperature cracking inevitably occurs during curing, because the internal temperature is increased by the heat of hydration, and the internal and external temperature difference of the caisson is more than 30 ° C. In addition, in addition to the temperature cracking caused by the temperature difference between the inner and outer surfaces, there is also a dry shrinkage crack that is generated as the outer surface shrinks in hay during the caisson curing process.

Figure 1a is a graph showing the temperature and temperature difference of the inner and outer surfaces of the caisson with curing time. It takes about 12 to 15 days to complete curing. The internal temperature is increased to about 90 ° C according to the heat of hydration, and the maximum temperature difference with the internal temperature is about 60 ° C or more. Therefore, cracks such as cracks are generated in the cured structure having such a temperature difference.

In particular, in the middle temperature (하는 中), where the temperature of the outside air increases significantly, the heat of hydration increases with the increase of the outside temperature, and the temperature cracking of the caisson becomes more severe. Therefore, in the art, various measures such as material measures, construction measures, and structural measures are used as measures to reduce temperature cracking. In particular, construction measures of summer concrete in summer, such as pre-cooling by ice plant ( Pre-cooling and pipe cooling are used, and another method is to install a pipe on the outside to wet the external surface by spraying water on the external surface.

The former pre-cooling is to immerse sand or gravel in ice water and then mix it with cement or to spray cold coolant on aggregate or sand. The latter pipe cooling involves placing pipes at regular intervals inside the structure before concrete is poured and then placing concrete. And curing the concrete while circulating the cooling water in the pipe to lower the internal temperature of the concrete.

FIG. 1B schematically illustrates a method of spraying water onto the outer surface 20 of the caisson 10 by installing a pipe 30 outside the conventional caisson 10. As shown in FIG. 1B, water is wetted to the outer surface 20 of the caisson 10 through the pipe 30 to prevent dry shrinkage cracks generated during dry shrinkage. However, this method prevents dry shrinkage cracks, and there is a problem that cracks due to temperature differences between the outer surface and the inner surface still occur.

1C schematically illustrates a temperature difference reducing device by a conventional pipe 30 cooling method. As shown in FIG. 1C, the coolant 40 is stored in the water tank 100, and the coolant 40 is supplied to the pipe 30 installed inside the caisson 10 by a pump (not shown). Therefore, the cooling water flows inside the caisson, thereby cooling the inside of the caisson. As the inside of the caisson 10 is cooled, the temperature difference between the outer surface 20 and the inside is reduced.

However, the pre-cooling has a problem that the ice plant equipment is complicated and the cost is increased, the precise temperature control is not possible, the pipe cooling is complicated in construction and the microcracks are generated around the pipe.

Therefore, the present invention was devised to solve the above problems, the facility is simple to reduce the temperature cracking of the concrete, the cost is reduced, accurate temperature control, easy construction and temperature crack reduction method and ease of construction It is an object to provide a device.

 The proposed apparatus and method for reducing temperature cracks are provided with a hose having a plurality of holes formed at a relatively high position to heat the outer surface, so that the temperature difference between the outer surface temperature of the caisson and the inner temperature due to the hydration heat of the caisson is within 20 ° C. Keep it healthy.

This object is made possible by the control means controlling the heating means provided in the water tank so that water heated to an appropriate temperature is efficiently heated on the entire outer surface through the hose hole. Efficient heating of the outer surface is made possible by the curing cloth covering the entire outer surface and the insulating member covering the curing cloth.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings.

An object of the present invention is to assemble a reinforcing bar, install a formwork, the temperature difference reduction device generated in the caisson formed by pouring concrete into the formwork, the water storage can be stored inside, the water tank; And a hose installed at one side of the outer surface of the caisson and having a plurality of holes in the surface thereof, and having water stored in the water tank supplied through the injection pipe to be discharged through the holes. It can be achieved as a concrete temperature difference reducing device that flows to the surface to reduce the temperature difference between the inner and outer surfaces of the caisson.

At least one hose is installed at the high part of the caisson so that the water discharged from the hole flows down the entire outer surface, and is formed around the end where the caisson and the ground are combined to collect the water flowing down the outer surface. It may be characterized in that it further comprises a water channel for supplying water to the tank.

It may be characterized in that it further comprises a pump which is provided between the water tank and the injection tube to supply the heated water to the hose.

It may be characterized in that it further comprises a curing cloth installed on the entire outer surface to absorb a portion of the water discharged from the hole to make the absorbed water in contact with the outer surface.

It is characterized in that it further comprises a thermal insulation member which is provided to cover the entire curing cloth to keep the water.

The insulating member may be characterized in that the vinyl canvas.

The bath may be characterized in that it further comprises a heating means for heating the water.

It is connected to the heating means, it may be characterized in that it further comprises a control means for supplying power to the heating means, maintaining the temperature of the water supplied to the hose at 50 ~ 80 ℃.

The control means may be characterized in that for controlling the pump to adjust the supply rate of water.

A temperature sensor is further included in each of the outer surface and the inside of the caisson, and the control unit calculates the temperature difference between the outer surface and the caisson and when the temperature difference is greater than the preset temperature difference, the heating means is operated to supply the heated water to the hose through the pump. It may be characterized by.

As another category, an object of the present invention is to reduce the temperature difference generated in a caisson formed by assembling reinforcing bars, installing a formwork, and placing concrete into the formwork. It is provided with a plurality of holes in one end, at least one end of the hose is installed, connected to each of the other end of the hose through the injection pipe connected to the water tank for storing the water inside, the edge of the caisson and the ground contact Installing a channel; Heating the water stored in the tank by the heating means provided in the tank; Supplying heated water to the hose by a pump; Water supplied to the hose is discharged from the hole, the front surface of the outer surface is heated by the water, so that the temperature difference between the outer surface and the inside of the caisson is reduced; And a step of repeating the heating step, the supplying step and the reducing step until the water flowing down to the outer surface is collected into the channel and supplied to the tank, and curing of the caisson is completed. Can be achieved.

The installation step may further include a step of installing the curing cloth over the outer surface, and in the step of reducing the temperature difference, the curing cloth may be characterized by absorbing a part of the water discharged from the hole.

After the curing step of installing the curing, and further comprising the step of covering the insulating member on the curing cloth, it may be characterized in that to maintain the temperature of the water heated in the temperature reduction step.

In the heating step, the control means may supply power to the heating means to heat the temperature of the water to 50 ~ 80 ℃.

In the supplying step, the control means may control the pump to adjust the supply speed of the water.

Before the heating step, the control means calculates the temperature difference between the external surface and the internal temperature based on the external surface temperature and the caisson internal temperature measured by the temperature sensor installed in each of the external surface and the caisson, and when the temperature difference is more than the preset temperature difference, heating It may be characterized in that it further comprises the step of operating the means and the pump.

The control means may control the heating means and the pump to maintain the temperature difference below a predetermined value.

Another object of the present invention can be achieved as a concrete structure cured by the concrete method for reducing the temperature difference.

Therefore, according to one embodiment of the present invention as described above, by installing a hose having a plurality of holes on the outer surface of the caisson to increase the temperature of the caisson outer surface to reduce the temperature between the caisson inside and the outer surface It will have the effect of preventing internal cracking caused by the difference.

In addition, by increasing the external surface temperature, the temperature difference between the inside and outside surfaces of the caisson is reduced to prevent internal cracking due to the temperature difference, and the external surface is efficiently heated because the absorbent curing cloth always contacts the external surface. It can be, and has the effect of preventing the surface cracks due to dry shrinkage. In addition, the water flowing on the outer surface is gathered back into the water supply can be supplied to the water tank is continuously circulated, there is an advantage that can reduce the temperature difference.

And, according to an embodiment of the present invention, by further comprising a heat insulating member on the curing cloth, there is an effect that can increase the heating efficiency of the external surface by maintaining the temperature of the heated water for a long time. In addition, the hose having a hole is installed in the high portion of the caisson, the naturally flowing water is supplied back to the tank can circulate the water with a relatively low power to achieve the advantage of the present invention economically To have.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be readily apparent to those skilled in the art that various other modifications and variations are possible without departing from the spirit and scope of the present invention. Are all within the scope of the appended claims.

With reference to the accompanying drawings will be described in detail a preferred embodiment that can be easily implemented by those skilled in the art to which the present invention pertains. However, in describing in detail the operating principle of the preferred embodiment of the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In addition, the same reference numerals are used for parts having similar functions and functions throughout the drawings. Throughout the specification, when a part is 'connected' to another part, this includes not only 'directly connected' but also 'indirectly connected' with another element in between. do. In addition, "including" a certain component does not exclude other components unless specifically stated otherwise, it means that may further include other components.

<Configuration of temperature difference reducing device>

Hereinafter, to describe the configuration of the abatement apparatus for reducing the temperature difference between the outer surface 20 and the inner surface 50 of the caisson 10 generated during the pouring of the mass concrete (caisson) in accordance with an embodiment of the present invention do. First, Figure 2 shows a perspective view of a concrete temperature difference reducing apparatus according to an embodiment of the present invention. As shown in FIG. 2, the concrete temperature difference reducing device includes a hose 300 installed on a part of the outer surface 20 of the caisson 10, a curing cloth 200 and an insulating member 210 covering the outer surface 20. The water 40 includes a water tank 100 stored therein.

The hose 300 is provided on the outer surface 20 of the caisson 10. As shown in FIG. 2, the hose 300 is provided at a higher portion of the outer surface 20 of the caisson 10. A plurality of holes 310 are formed in the hose 300 and have a structure in which water 40 can be discharged through the holes 310. Therefore, the hose 300 is installed at a position where water 40 discharged by the hole 310 can naturally flow on the outer surface 20 by gravity. Each of the hoses 300 is connected to the water tank 100 through an injection tube. Water 40 is stored in the water tank 100, including the pump 110 between the injection pipe and the water tank 100 to supply the water (40) stored in the water tank 100 to the hose 300.

In addition, a water channel 400 is formed at a corner portion where the caisson 10 and the ground 1 are coupled to each other. The water 40 discharged into the hose hole 310 flows to the outer surface 20 and is collected in the water channel 400. The water channel 400 is configured such that the water 40 collected in the water channel 400 enters the water tank 100 again. In addition, the water tank 100 includes a heating means (500). The heating means 500 heats the water 40 stored in the water tank 100. The temperature of the heated water 40 becomes 40-80 degreeC. The control means 600 is coupled to the heating means 500, and the control means 600 supplies power to the heating means 500 to operate the heating means 500 to store the water 40 stored in the water tank 100. It is controlled to be heated to the set temperature.

3A is a cross-sectional view taken along the line A-A 'of FIG. As shown in FIG. 3A, the hose 300 is located at the uppermost portion of the highest surface of the outer surface 20 of the caisson 10. Accordingly, the water 40 discharged through the hose hole 310 naturally flows downward by the inclination formed in the caisson 10, and the water 40 flowing down is collected in the water channel 400. And, as shown in Figure 3a, the outer surface 20 of the caisson 10 is provided with a curing cloth 200.

Curing cloth 200 is provided with a surface material such as a nonwoven fabric. Therefore, a portion of the water 40 discharged from the hose hole 310 is absorbed by the curing cloth 200. Therefore, since the curing cloth 200 absorbing the water 40 is always in contact with the outer surface 20 of the caisson 10, the water 40 is always in contact with the outer surface 20 of the caisson 10. do. The temperature of the water 40 discharged by the hose hole 310 corresponds to about 40 ~ 80 ℃. The outer surface 20 of the caisson 10 is heated by the water 40 discharged corresponding to approximately 10 to 30 ° C.

In addition, a temperature sensor (not shown in FIG. 3A) may be provided on each of the outer surface 20 and the inside 50 of the caisson 10. The temperature sensor installed in the caisson 50 is installed in the formwork 50 before placing concrete. Therefore, the control means 600 which will be described later can calculate the temperature difference between the outer surface 20 and the inner 50 by the temperature sensor installed on the caisson outer surface 20 and the temperature sensor installed on the caisson inner 50. have. Then, based on the calculated temperature difference, the pump 110 is controlled to adjust the supply speed of the water 40, and the heating means 500 is controlled to adjust the temperature of the water 40.

Curing cloth 200 is installed to increase the heating efficiency. As the curing cloth 200 comes into contact with the outer surface 20, the water 40 discharged into the hose hole 310 continues to come into contact with the outer surface 20 without gaps, thereby allowing the outer surface of the caisson 10 to be more quickly formed. 20) is heated. In addition, the heat insulating member 210 covers the curing cloth 200 and the hose 300. By covering the heat insulating member 210 on the curing cloth 200 to heat the heated water (40). That is, the water 40 heated for a longer time may be maintained at a high temperature to increase the heating efficiency. The thermal insulation member 210 may be provided with a vinyl canvas having a thermal insulation effect.

Figure 3b is a plan view of a concrete temperature difference reduction apparatus according to an embodiment of the present invention. As shown in FIG. 3B, the water 40 stored in the water tank 100 controls the heating means 500 to heat the water 40 to a set temperature. The heated water 40 is supplied to the hose 300 by the pump 110, and the water 40 supplied to the hose 300 is discharged to the hole 310 formed in the hose 300. As shown in FIG. 3B, the water 40 discharged into the hole 310 naturally flows down to the water channel 400 and collects. In addition, as described above, the curing cloth 200 covers the outer surface 20, and the outer surface 20 of the caisson 10 is heated by the water 40 absorbed by the curing cloth 200. . In addition, since the thermal insulation member 210 is included on the curing cloth 200, the temperature of the water 40 is maintained for a longer time. As shown in FIG. 3B, the water 40 collected in the water channel 400 is supplied to the water tank 100 to be circulated continuously after heating.

< Example >

Hereinafter, a reduction method for reducing the temperature difference between the outer surface 20 and the inside 50 of the caisson 10 generated during the concrete curing using the temperature difference reducing device described above will be described. First, Figure 4 shows a flow chart of a concrete temperature difference reduction method according to an embodiment of the present invention. Assembling the reinforcing bars to form the structure, install the formwork to cast concrete into the form to form the caisson 10.

The hose 300 is installed at a relatively high portion of the caisson 10 forming a slope. As described above, the hose 300 has a plurality of holes 310 formed therein. Therefore, the water 40 may be discharged to the hole 310 by the hydraulic pressure inside the hose 300. In addition, the at least one hose 300 is installed at the highest position in the caisson 10 so that the water 40 discharged to the hole 310 can naturally flow down by gravity. Then, the hose 300 is connected to the water tank 100 by the injection tube. The water tank 100 is filled with the appropriate amount of water 40 (S10).

The waterway 400 is installed at a corner portion where the caisson 10 and the ground 1 contact each other. The water channel 400 is located in a portion where water 40, which flows down, rides on the outer surface 20 of the caisson 10 later. In addition, as described above, the water channel 400 is connected to the water tank 100 and the water 40 is supplied back to the water tank 100 through the water channel 400 to be circulated. Then, the entire outer surface 20 of the caisson 10 is covered with a curing cloth 200 (S20). Curing cloth 200 can be used irrespective of the type as long as the material can absorb the water (40). In a specific example, a nonwoven fabric was used.

Then, the insulating member 210 is put on the curing cloth 200 covered with the outer surface 20 (S30). Insulating member 210 is to maintain the temperature of the water 40, while the water 40 is discharged from the hose hole 310 and absorbed by the curing cloth 200 to heat the outer surface 20 Is installed. In a specific embodiment, the vinyl canvas was used as the insulating member 210. However, other materials and configurations are also possible as long as they are excellent in thermal insulation and can generate a warming effect.

The control means 600 determines whether to supply the water 40 to the hose 300, to what extent the speed of supply of the water 40, or to what extent the temperature of the water 40 to be supplied to the hose 300 is set. Done. That is, each of the outer surface 20 and the inner 50 of the caisson 10 is provided with a temperature sensor 60 and the temperature sensor 60 installed in the inner 50 is installed in the formwork before pouring concrete. Done. The control means 600 detects the current temperature of the outer surface 20 and the caisson inside 50 from the temperature sensor 60 and the temperature sensor 60 installed on the inner surface of the caisson 50, The temperature difference between the outer surface 20 and the caisson inside 50 is calculated.

The operation of the heating means 500 and the operation of the pump 110 by the control means 600 may start immediately after installing the hose 300 and the water tank 100, but the temperature difference calculated by the control means 600 It may also be activated when the temperature difference exceeds a preset temperature difference. That is, after the concrete is poured, the temperature difference is increased by the heat of hydration, and the operation is started when the temperature difference is more than the preset temperature difference (30 ° C. in the specific embodiment).

The control means 600 supplies power to the heating means 500 to heat the water 40 filled in the water tank 100 (S40). The temperature of the heated water 40 is set based on the temperature difference calculated at the present control means 600. That is, it will have to be heated to a higher temperature if the temperature difference is greater than if it is small. The control means 600 causes the water 40 to be heated within the range of 40 to 80 ° C. by the heating means 500 based on the current temperature difference.

Then, the control means 600 operates the pump 110 to supply the heated water 40 to the hose 300 (S50). The control means 600 sets the flow rate of the water 40 flowing in the hose 300 based on the temperature difference between the current outer surface 20 and the inside 50, and supplies the water 40 at the set supply speed. Done. 5 is a block diagram showing a signal flow by the control means 600 of the concrete temperature difference reducing apparatus according to an embodiment of the present invention. As shown in FIG. 5, the control means 600 is connected to the current external surface 20 in real time by the temperature sensor 60 installed on the outer surface 20 and the temperature sensor 60 installed on the caisson inside 50. The temperature inside the caisson 50 may be sensed. In addition, the control means 600 calculates the temperature difference between the outer surface 20 and the inside 50, adjusts the temperature of the water 40 supplied to the hose 300 based on the current temperature difference, the pump 110 By controlling the control the supply speed of the water 40 is supplied to the hose (300).

Since the hose 300 is closed at the opposite end of the portion to which the injection pipe is connected, the water 40 supplied to the hose 300 by hydraulic pressure is discharged to the hose hole 310. A portion of the water 40 discharged from each of the hose holes 310 is absorbed by the curing cloth 200 (S60). Since the curing cloth 200 is covered in front of the caisson outer surface 20, the heated water 40 is always in contact with the outer surface 20 by the curing cloth 200. Therefore, the external surface 20 is heated by the water 40 absorbed by the curing cloth 200. In addition, the outer surface 20 is heated to reduce the temperature difference between the inner temperature of the caisson 10 and the outer surface 20. Therefore, while preventing adverse effects due to temperature cracking due to the heat of hydration, the water 40 soaked in the curing cloth 200 is always in contact with the outer surface 20 to prevent cracking due to dry shrinkage.

The water 40 which is not absorbed by the curing cloth 200 and flows down along the outer surface 20 is collected in the water channel 400. The water 40 collected in the water channel 400 is supplied to the water tank 100 again (S70). The step of reducing the temperature difference by heating the water 40, supplying the hose 300, and heating the outer surface 20 is continued until curing of the caisson 10 is terminated (S80). 6 is a graph illustrating a temperature difference with time in a concrete temperature difference reduction method according to an embodiment of the present invention. As shown in FIG. 6, the time (age) until curing is completed takes about 7 to 8 days. When the temperature difference reaches 30 ° C., the heated water 40 is supplied to the hose 300 by the pump 110, and the temperature difference is reduced by heating the outer surface 20. In addition, the maximum temperature difference ΔT = T ₁ -T ₂ is also reduced in comparison with FIG. 1A.

Figure 1a is a graph showing the outer surface temperature and the internal temperature and the temperature difference of the caisson during the pouring concrete,

Figure 1b is a schematic diagram of a device for preventing dry shrinkage cracks by spraying water on the outer surface using a conventionally installed pipe,

1C is a schematic diagram of a temperature difference reducing device in which a pipe tube through which a cooling water flows is installed in a conventional caisson;

2 is a perspective view of a concrete temperature difference reducing apparatus according to an embodiment of the present invention,

3A is a cross-sectional view along the line A-A 'of FIG.

Figure 3b is a plan view of a concrete temperature difference reducing apparatus according to an embodiment of the present invention,

Figure 4 is a flow chart of the concrete temperature difference reduction method according to an embodiment of the present invention,

Figure 5 is a block diagram showing the signal flow of the concrete temperature difference reducing apparatus according to an embodiment of the present invention,

6 is a graph illustrating an external surface temperature, an internal temperature, and a temperature difference with curing time according to a concrete temperature difference reducing method according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

1: ground

10: caisson

20: outer surface

30: Pipe of the invention

40: water

50: inside the caisson

60: temperature sensor

100: tank

110: pump

200: Curing cloth

210: Thermal insulation member

300: hose

310: hose hole

400: channel

500: heating means

600: control means

Claims (18)

In the temperature difference reducing device generated during the curing of the structure formed by assembling the reinforcing bars, installing the formwork, and placing concrete into the formwork, A water tank capable of storing water therein and heating the water; And A hose installed at one side of the outer surface of the structure, provided with a plurality of holes in the surface, and the water stored in the tank is supplied through an injection pipe and discharged through the hole; And the heated water flows through the hole to the outer surface to reduce the temperature difference between the inside of the structure and the outer surface. The method of claim 1, At least one hose is installed on the upper end of the structure, the water discharged from the hole flows down the entire outer surface, It is formed around the end of the structure and the ground is coupled, the water flowing down the external surface is collected, the concrete temperature difference reducing device further comprises a water supply for supplying the collected water to the tank. The method of claim 2, And a pump which is provided between the water tank and the injection pipe to supply the heated water to the hose. The method of claim 3, wherein And a curing cloth installed on the entire outer surface to absorb a portion of the water discharged from the hole so that the absorbed water comes into contact with the outer surface. The method of claim 4, wherein It is provided so as to cover the entire curing cloth, concrete temperature difference reducing device further comprises a heat insulating member for insulating the water. The method of claim 5, The thermal insulation member is a concrete temperature difference reduction device, characterized in that the vinyl canvas. The method of claim 1, The water tank further comprises a heating means for heating the water concrete temperature difference reduction device. The method of claim 7, wherein And a control means connected to the heating means to supply power to the heating means and to maintain the temperature of the water supplied to the hose at 50 to 80 ° C. The method of claim 8, The control means controls the pump to control the temperature difference concrete concrete, characterized in that for adjusting the supply speed of the water. The method of claim 9, Further comprising a temperature sensor on each of the outer surface and the inside of the structure, The control means calculates the temperature difference between the outer surface and the inside of the structure, when the temperature difference is more than a predetermined temperature difference, by operating the heating means to supply the heated water to the hose through the pump Temperature difference reduction device. In the method of reducing the temperature difference generated when the structure is formed by assembling the reinforcing bars, installing the formwork, and placing concrete into the formwork, It has a plurality of holes in the outer surface of the upper end of the structure forming the inclined, one end is installed at least one blocked hose, the water is stored inside through the injection pipe connected to each of the other end of the hose Connecting to the water tank, and installing a water channel at a corner portion of the structure and the ground contacted with the water tank; Heating the water stored in the tank by heating means provided in the tank; Supplying the heated water to the hose by a pump; The water supplied to the hose is discharged from the hole, and the front surface of the outer surface is heated by the water to reduce a temperature difference between the outer surface and the inside of the structure; And And repeating the heating step, the supplying step, and the reducing step until the water flowing down the outer surface is collected into the water channel and supplied to the water tank, and curing of the structure is completed. How to reduce concrete temperature difference. The method of claim 11, The installation step, Further comprising the step of covering the cured cloth in front of the outer surface, In the temperature difference reduction step, The method for reducing the temperature difference of the concrete, characterized in that the curing cloth absorbs a portion of the water discharged from the hole. 13. The method of claim 12, After the curing step installation step, Further comprising the step of covering the insulating member on the curing cloth, Concrete temperature difference reduction method characterized in that to maintain the temperature of the water heated in the temperature reduction step. The method of claim 11, In the heating step, The control means supplies power to the heating means to heat the temperature of the water to 50 ~ 80 ℃ concrete temperature difference reduction method. The method of claim 14, In the supply step, The control means controls the pump to adjust the concrete temperature difference, characterized in that for adjusting the water supply speed. The method of claim 15, Before the heating step, By the external surface temperature and the internal temperature of the structure measured by the temperature sensor installed on each of the outer surface and the inside of the structure, And the control means calculates a temperature difference between the outer surface and the inside and operates the heating means and the pump when the temperature difference is greater than or equal to a preset temperature difference. The method of claim 16, And said control means controls said heating means and said pump to maintain said temperature difference at or below a predetermined value. A concrete structure cured by the temperature difference reducing method of claim 11.

Images