KR20140036735A - Concrete heat of hydration reduction device and operation method thereof - Google Patents

Abstract

The present invention relates to a concrete hydration heat reducing device and a method for operating the concrete hydration heat reducing device including: a supply pipe arranged in a mold in a height direction of the mold and receiving water from an external water supply pipe; a header pipe horizontally arranged in the lower part of the inside of the mold, having one side communicated with the supply pipe, and making water moved from the supply pipe to branch off; and a plurality of drain pipes connected upward of the mold from the header pipe, connected apart from each other in a lengthwise direction of the header pipe, and discharging water supplied from the header pipe to the outside. [Reference numerals] (AA) External supply

Description

Concrete heat hydration reduction device and operation method

The present invention relates to a device for reducing heat of hydration of concrete and a method of operating the same, and more particularly, to a method for reducing heat of hydration of concrete and improving a method of operating the same by reducing the heat of hydration generated when curing concrete. .

Concrete cures concrete mixtures of cement, sand, gravel, and water, and is used as an important material in civil engineering or building structures by resisting natural winds such as water / fire / earthquake.

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.

When the concrete structure is poured, it is accompanied by hydration. The 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.

The heat of hydration raises the internal temperature of the structure, and as a result, a temperature difference occurs inside and outside the structure, causing a temperature crack. Such temperature cracks inevitably occur during curing, because the internal temperature is increased by the heat of hydration, and the internal and external temperature difference of the structure is 30 ° C. or more. In addition, in addition to the temperature cracking caused by the temperature difference between the inner surface and the outer surface, there is also a dry shrinkage crack that occurs as the outer surface is dried and contracted during the curing process of the structure.

In particular, these problems are emerging as larger problems in mass concrete structures. Therefore, by reducing the heat of hydration that causes these problems to prevent the concrete structure, in particular, the mass cracks while curing the concrete concrete structure, it is possible to accurately control the temperature of the hydration heat reduction device or operating method that can be improved accordingly Development is needed.

Korea Patent Registration No. 10-0412980

The present invention is to provide a concrete hydration heat reduction device and its operating method to artificially reduce the heat of hydration and improve the curing speed of concrete when the heat of hydration is generated at an excessively high temperature when curing concrete after pouring concrete in the formwork For the purpose of

The present invention, the supply pipe pipe is arranged along the height direction of the formwork inside the formwork to receive water from an external water pipe; A header pipe pipe disposed horizontally below the formwork to communicate with the supply pipe pipe and branching water flowed from the supply pipe pipe; And connected to the upper direction of the formwork from the header pipe pipe, a plurality of spaced apart from each other along the longitudinal direction of the header pipe pipe, drain pipe pipe for discharging the water supplied from the header pipe pipe to the outside Includes, when water is supplied to the supply pipe pipe from the outside, the supplied water flows to the header pipe pipe, flows to the drain pipe pipe is discharged to the outside of the concrete to the heat of hydration generated in the concrete It provides a concrete hydration heat reduction device to reduce.

According to another aspect of the invention, the present invention, a) the supply pipe pipe disposed along the height direction of the formwork, the header pipe pipe connected in communication with one side of the supply pipe pipe arranged in the horizontal direction of the formwork And a drain pipe pipe connected to the header pipe pipe and spaced apart from each other along a length direction of the header pipe pipe and disposed along a height direction of the formwork; b) pouring the concrete into the formwork; c) water supplied from an external water pipe flows through the supply pipe and flows to the header pipe pipe, branches from the header pipe pipe to the drain pipe pipe, flows, and is discharged to the outside of the concrete to exchange heat; It provides a method of operating a concrete hydration heat reduction device comprising the step of reducing the heat of hydration of concrete.

Concrete hydration heat reduction apparatus according to the present invention and its operation method has the following effects.

When hydration heat is generated in the process of curing concrete after pouring concrete into the formwork, when water is supplied, water flows through the supply pipe, header pipe, and drainage pipe, and is discharged to the outside of the concrete to reduce the heat of hydration generated in concrete. As the concrete is cured, cracks may be prevented from being generated by the heat of hydration.

In particular, the plurality of drain pipes and the drainage control means can be adjusted so that the water is concentrated in the area where more heat of hydration is generated in the concrete can be prevented from excessively wasted water to reduce the heat of hydration.

By storing the water overflowing to the outside of the formwork, the discharged water can be recycled after flowing inside the concrete, and the stored water can be recycled by recycling it back into the supply pipe pipe, thus wasteing water necessary to reduce the heat of hydration of the concrete. Can be prevented.

By providing the drainage control means and the temperature sensor, it is possible to measure the temperature of the heat of hydration during the concrete curing process can effectively control the hydration heat reduction device. In particular, the area where the heat of hydration is not necessary to supply water can close the drainage pipe, and only the area where the heat of hydration is generated can open the drainage pipe to prevent waste of water and to reduce the heat of concrete hydration. By controlling effectively, the curing speed of concrete can be improved and the workability can be improved.

1 is a view illustrating a concrete hydration heat reduction apparatus and an operation process according to an embodiment of the present invention.
2 is a view illustrating a concrete hydration heat reduction device and an operation process according to another embodiment of the present invention.
3 is a view illustrating a concrete hydration heat reduction apparatus and an operation process according to another embodiment of the present invention.
4 to 6 illustrate a form in which the drain pipe of the concrete hydration heat reduction apparatus according to the present invention is disposed according to various embodiments.

1 is a concrete hydration heat reduction apparatus and operation process according to an embodiment of the present invention is shown, Figure 2 is a concrete hydration heat reduction apparatus and operation process according to another embodiment of the present invention is shown, Figure 3 The concrete hydration heat reduction apparatus and the operation process according to another embodiment of the present invention is shown, Figures 4 to 6 is a form in which the drain pipe pipe of the concrete hydration heat reduction apparatus according to the present invention is arranged according to various embodiments will be.

1 to 6, the concrete hydration heat reduction apparatus according to an embodiment of the present invention, the supply pipe pipe 151, the header pipe pipe 153 and the drain pipe pipe 155.

First, the supply pipe pipe 151 is disposed along the height direction of the formwork 110 inside the formwork 110. The supply pipe 151 receives water used to reduce the heat of hydration generated when curing the mass concrete 130 placed in the formwork 110 from an external water pipe (not shown). However, since the mass concrete is described to describe the embodiments according to the present invention, it is not always limited to the mass concrete.

Referring to FIG. 1, a hose 101 is connected to the supply pipe pipe 151, and water is supplied from an external water pipe through the hose 101. As shown in FIG. 1, a pump 103 is connected to the hose 101 so that the water of the water pipe may be supplied to the supply pipe 151 by the operation of the pump 103.

The header pipe tube 153 is disposed horizontally in the lower side of the formwork 110. One side of the header pipe pipe 153 is connected to communicate with the supply pipe pipe 151. When water is supplied from the external water pipe to the supply pipe pipe 151, the water is the header pipe pipe 153. Flows). As will be described later, a plurality of drain pipes 155 are connected to the header pipe pipe 153 so that water flowing into the header pipe pipe 153 branches along the plurality of drain pipe pipes 155 and flows. Can be. That is, when the header pipe pipe 153 is cured after the concrete is poured, it serves to branch the water supplied to evenly reduce the heat of hydration generated in the concrete in all areas.

The drain pipe 155 is connected to the header pipe 153, and the drain pipe 155 is connected in communication with the header pipe 153. The drain pipe 155 is provided with a plurality of spaced apart from each other at equal intervals along the longitudinal direction of the drain pipe 153. One side of the drain pipe pipe 155 is connected in communication with the header pipe pipe 153, and is disposed in the height direction of the formwork 110 similarly to the supply pipe pipe 151. Water supplied from an external water pipe to the supply pipe pipe 151 flows through the header pipe pipe 153, and each of the plurality of drain pipe pipes 155 connected in communication with the header pipe pipe 155. Branched and flows to the outside.

On the other hand, as described above, the plurality of drain pipe pipe 155 may be provided spaced apart from each other at equal intervals along the longitudinal direction of the header pipe pipe 153, as shown in Figures 4 to 6 It may be arranged and provided in an embodiment. First, as shown in FIG. 4, the drain pipe pipe 155 is disposed in the most common manner. It is spaced apart.

Referring to FIG. 5, the drain pipe pipe 155 is a drain pipe pipe 155 having the same diameter, but is disposed in the central area of the concrete 130 at a narrow interval from each other, and the The farther apart from the outer region, the spaced apart interval between the drain pipe 155 is arranged to be wider. This arrangement form is to improve the effect of reducing the heat of hydration in the central region because the heat generated in the central region of the concrete 130 is relatively higher than the outer region of the concrete 130 when the concrete 133 is cured For sake.

Referring to FIG. 6, the plurality of drain pipes 155a and 155b are spaced apart from each other at equal intervals along the length direction of the header pipe pipe 153, and disposed in the central region of the concrete 130. The diameter of the drain pipe 155b is arranged to be larger than the diameter of the drain pipe 155a disposed in the outer region of the concrete 1350. This is to improve the effect of reducing the heat of hydration generated at a higher temperature in the central region of the concrete 130 for the same reason as the shape arranged in FIG. 4 described above.

As shown in Figures 4 to 6, the drain pipe pipe 155 and the header pipe pipe 153 of the concrete hydration heat reduction apparatus according to the present invention is arranged in only one row in the drawing, but need not be limited thereto. It can be arranged in two or more rows without. At this time, if there are two or more rows, the supply pipe pipe 151 may be provided to supply water to each row, it is also possible to supply water to only one of the supply pipe pipe 151.

4 to 6 illustrate only some of the various arrangement forms of the drainage pipe 155 of the concrete hydration heat reduction apparatus according to the present invention, for example, with the drawings, the arrangement of the drainage pipe 155 is In addition, since it can be arranged in more various forms as needed, it is not necessary to be limited to the above-described arrangement.

The supply pipe pipe 151, the header pipe pipe 153, and the drain pipe pipe 155 as described above are provided inside the formwork 110 after the formwork 110 is installed. After installing the supply pipe pipe 151, the header pipe pipe 153 and the drain pipe pipe 155 in the formwork 110, the concrete is poured into the formwork 110. When the concrete is poured, the supply pipe pipe 151, the header pipe pipe 153, and the drain pipe pipe 155 are buried in the concrete as shown in FIG. 1.

When the concrete is cured in the formwork 110, heat of hydration is generated in the concrete. When water is supplied to the supply pipe 151 from the outside, the water flows to the header pipe 153, Flow from the header pipe pipe 153 to the drain pipe pipe 155 is discharged to the outside of the concrete (130). Water flows through the supply pipe 151, the header pipe 153, and the drain pipe 155 to reduce the heat of hydration generated in the concrete around the respective pipe 151, 153, and 155. .

On the other hand, the water discharged to the outside of the concrete 130 through the drain pipe pipe 155 flows to the outside of the formwork 110 is stored around the formwork 110. The water stored around the formwork 110 may be recycled to the supply pipe 151 by a pump 107 provided to supply external water to the supply pipe 151. And when the water thus stored is recycled to the supply pipe pipe 151 by the pump 107, the hose 101 of the side connected to the external water pipe for supplying water to the supply pipe pipe 151 is To be closed by the valve 103.

And as described above, the stored water may be stored in a separate structure 170 shown in FIGS. The structure 170 may be another formwork provided for pouring concrete, or may be a structure separately provided to store the stored water, and may be various types of structures.

The concrete hydration heat reduction device may further include a drain control means 157 in addition to the above-described supply pipe pipe 151, header pipe pipe 153 and drain pipe pipe 155. The drain control means 157 is installed on each of the drain pipe pipe 155 is provided to control the discharge of water through the drain pipe pipe 155.

The drain control means 157 may be provided as an automatic valve which is operated manually by an operator or automatically operated according to a predetermined condition. When the drain control means 157 is manually operated is provided with a stopper (not shown) for closing the drain pipe 155, the operator closes the drain pipe 155 with the stopper to the drain It is possible to directly control the discharge of water through the pipe 155. For example, when the concrete 130 is poured after curing, it may be opened to the drain pipe pipe 155 corresponding to the portion where the heat of hydration is generated at a high temperature, and the portion where the heat of hydration is not generated at a high temperature is a corresponding position. The drain pipe 155 can be closed with the stopper.

On the other hand, when the drain control means 157 is provided with an automatic valve, the operator can set the valve to be opened in advance and the valve to be closed. In this case, the plurality of drain pipes 155 may be divided into at least two groups, and the opening and closing of the automatic valve may be set according to the divided groups. Referring to FIG. 4, the plurality of drain pipes 155 are divided into two groups. The automatic valve 157a of the drain pipe 155 corresponding to the odd numbered position with respect to the supply pipe 151 is closed and corresponds to the even numbered position with respect to the supply pipe 151. The automatic valve 157b of the drain pipe 155 is left open. In this case, since the water is not discharged to all of the drain pipes 155, the burden of the pump 107 operated to supply water is relatively higher than when water is discharged to all of the drain pipes 155. It can be reduced to prevent the life of the pump 107 is shortened rapidly. Meanwhile, the dividing of the drain pipe 155 into groups is not limited to the above-described FIG. 3, and the worker may divide the group of the drain pipe 155 into various forms according to circumstances.

Concrete hydration heat reduction apparatus according to the present invention may further include a temperature sensor 159 connected to each of the drain pipe (155). The temperature sensor 159 senses the temperature of the concrete 130 around each of the drain pipe 155. The temperature sensor 159 may set a reference temperature in advance to open or close the drain control means 157 according to the temperature of the concrete 130 around each of the drain pipe 155. .

That is, each of the temperature sensor 159 detects the temperature of the concrete 130 around the drain pipe 155, and when the temperature of the concrete 130 is equal to or higher than a reference temperature, When the drain control means 157 is installed, and the concrete 130 temperature is less than the reference temperature, the drain control means 157 installed in the drain pipe pipe 155 may be closed. At this time, the drain control means 157 may be any of the manual valve or automatic valve, depending on the needs of the operator.

Hereinafter, the operating method of the concrete hydration heat reduction apparatus according to the present invention as described above will be described.

First, to form the concrete 110 to pour the concrete, before the concrete is placed on the formwork 110, install the concrete hydration heat reduction device in the formwork 110 as shown in Figure 1 and 2 do. In more detail, inside the formwork 110, a supply pipe pipe 151 is disposed along the height direction of the formwork 110, and is horizontally formed on the formwork 110 on one side of the supply pipe pipe 151. The header pipe pipe 153 is connected in communication. The plurality of drain pipe pipes 155 spaced apart from each other at equal intervals along the length direction of the header pipe pipe 153 in the header pipe pipe 153 are the dies 110, like the supply pipe pipe 151. Are connected in communication along the height direction.

As described above, when the concrete hydration heat reduction device is installed inside the formwork 110, the concrete is poured into the formwork 110. When concrete is poured, the concrete hydration heat reduction device is buried in the concrete. When it is time to cure the poured concrete 130, water is supplied to the concrete hydration heat reduction device to reduce the heat of hydration generated in the concrete (130).

 The supply pipe pipe 151 is connected to the hose 101 to receive water. The first water supplied to the supply pipe pipe 151 is supplied from a water pipe (not shown) provided outside, and the water thus supplied flows into the header pipe pipe 153. Water flowing into the header pipe pipe 153 is branched and flows into the drain pipe pipes 155 connected in communication with the header pipe pipe 153, and flows along the drain pipe pipe 155 and the concrete 130. Discharged outside).

The concrete 130 is generated in the concrete 130 while being heat exchanged by the water flowing and discharged along the supply pipe pipe 151, the header pipe pipe 153, and the drain pipe pipe 155 as described above. The heat of hydration to be reduced can be reduced.

On the other hand, the water discharged from the drain pipe pipe 155 to the outside of the concrete 130 and overflowed to the outside of the formwork 110 is stored in the periphery of the formwork 110. Water stored around the formwork 110 is recycled to the supply pipe 151 by a pump 107 provided to supply external water to the supply pipe 151. And when the water thus stored is recycled to the supply pipe pipe 151 by the pump 107, the hose 101 of the side connected to the external water pipe for supplying water to the supply pipe pipe 151 is It is closed by the valve 103.

And as described above, the stored water may be stored in a separate structure (170). The structure 170 may be another formwork provided for pouring concrete, or may be a structure separately provided to store the stored water, and may be various types of structures.

When the water discharged and stored in this way is recycled and used, it is not necessary to continuously receive water from an external water pipe, and water is generated when curing the concrete 130 because the water is not used once. It is possible to prevent excessive waste of water used to reduce the heat of hydration.

On the other hand, concrete hydration heat reduction apparatus according to the present invention may further include a drain control means 157 in the above-described configuration. In the concrete hydration heat reduction device as described above, when water is supplied to reduce the hydration heat generated in the concrete 130, the water is supplied to the supply pipe pipe 151, the header pipe pipe 153, and the drain pipe pipe 155. After flowing the), it is discharged to the outside of the concrete 130 through all of the drain pipe (155).

However, when water flows through all of the drain pipes 155 as described above, the burden on the pump 107 provided to supply water increases. And since the heat of hydration generated in the concrete 130 is not generated at the same temperature over the entire region, more heat is generated in some areas, less heat is generated in some areas the drainage pipe 155 The discharge of water through everything can be a waste.

Therefore, when manually operating the drainage control means 157 installed in the drainage pipe 155 is provided with the drainage control means 157 as a stopper, the worker is generated at a low temperature of the heat of hydration of the concrete 130 The drain pipe pipe 155 corresponding to an area to be closed is closed with the cap so that water is not discharged. Accordingly, the operator can adjust the concrete hydration heat reduction device according to the degree of the heat of hydration generated in the concrete 130, it is possible to prevent unnecessary waste of water.

On the other hand, in another embodiment of the concrete hydration heat reduction device is provided with the drain control means 157 in the configuration as described above, each of the drain pipe 153 is further provided with a temperature sensor 159 will be. At this time, the initial state of the drain control means 157 to close the drain pipe 155. After the concrete hydration heat reduction device is installed in the formwork 110, the temperature sensor 159 connected to the drain pipe 155 in the process of curing after pouring concrete into the formwork 110, the respective drainage The concrete temperature around the pipe 155 is sensed.

When the temperature of the concrete 130 detected by the temperature sensor 159 is equal to or higher than the reference temperature, the temperature sensor 159 sets a reference temperature in advance so that the drain control means 157 may be manually operated. When provided, the operator opens the occupation valve, and when the drain control means 157 is provided with an automatic valve, the valve is automatically opened.

Such an operation method has an effect of preventing excessive consumption of water supplied to reduce the heat of hydration generated in the concrete 130. Hydration heat generated when the concrete 130 is cured may not be generated at the same temperature in the entire region of the concrete 130. In particular, the central region of the concrete 130 may generate a higher heat of hydration than the outer region of the concrete 130, the heat of hydration generated in the outer region of the concrete 130 is not high temperature and continuously It may not be necessary to artificially reduce the heat of hydration by supplying.

Therefore, when operating the concrete hydration heat reduction device as in the present embodiment, in particular in the region of the concrete 130, the water is continuously supplied only to the region where the heat of hydration is generated, and the heat of hydration is not artificially reduced By using the drainage control means 157, the drainage pipe 155 may be closed to prevent unnecessary waste of water.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

101: hose 103: valve
107: pump 110: formwork
130: concrete 150: concrete hydration heat reduction device
151: supply pipe pipe 153: header pipe pipe
155: drain pipe 157: drain control means
159: temperature sensor

Claims (9)

In the hydration heat reduction device for reducing the heat of hydration generated during the curing of the structure formed by pouring concrete into the formwork,
A supply pipe tube disposed along the height direction of the formwork in the formwork to receive water from an external water pipe;
A header pipe pipe disposed horizontally below the formwork to communicate with the supply pipe pipe and branching water flowed from the supply pipe pipe; And
A drain pipe pipe connected to the upper side of the formwork from the header pipe pipe and spaced apart from each other along the length direction of the header pipe pipe, and draining water supplied from the header pipe pipe to the outside; Including,
When water is supplied to the supply pipe pipe from the outside, the supplied water flows to the header pipe pipe, flows to the drain pipe pipe is discharged to the outside of the concrete while reducing the heat of hydration generated in the concrete concrete hydration heat Abatement system. The method according to claim 1,
And a pump for discharging the water discharged from the drain pipe pipe to the outside of the concrete and overflowing into the formwork, and recycling the water to the supply pipe pipe. The method according to claim 1,
It is coupled to each of the drain pipe, concrete hydration heat reduction device further comprises a drain control means for controlling the discharge of water through the drain pipe. The method according to claim 3,
The plurality of drain pipe pipe is divided into at least two groups,
Concrete hydration heat reduction device that is operated to open and close the drain pipe pipe differently according to each group. The method according to claim 3,
When the drain control means is operated manually,
The drain control means is a concrete hydration heat reduction device is provided with a stopper for closing the drain pipe. The method according to claim 3,
In each said drain pipe,
A temperature sensor is installed to detect the concrete temperature around each of the drain pipes,
Opening and closing of the drain control means is controlled by the temperature sensor,
The drain control means is a concrete hydration heat reduction device provided with an automatic valve. The method of claim 6,
The drain control means,
When the concrete temperature detected by the temperature sensor is higher than the set temperature, the drain pipe is opened,
The concrete hydration heat reduction device for closing the drain pipe if the water temperature in the drain pipe detected by the temperature sensor is less than the set temperature. In the method of operating the concrete hydration heat reduction device for reducing the heat of hydration generated during the curing of the structure formed by pouring concrete into the formwork,
a) a supply pipe pipe disposed along a height direction of the formwork, a header pipe pipe connected to one side of the supply pipe pipe and arranged in a horizontal direction of the formwork, and connected to the header pipe pipe, Installing a drain pipe pipe spaced apart from each other along a longitudinal direction of a header pipe pipe and disposed along a height direction of the die inside the mold;
b) pouring the concrete into the formwork;
c) water supplied from an external water pipe flows through the supply pipe and flows to the header pipe pipe, branches from the header pipe pipe to the drain pipe pipe, flows, and is discharged to the outside of the concrete to exchange heat; Concrete hydration heat reduction device operating method comprising the step of reducing the heat of hydration of concrete. The method according to claim 8,
The hydration heat reduction device further includes a pump,
In the step c)
Recirculating the water discharged to the outside of the concrete through the drain pipe pipe and overflowed to the formwork, the method of operating a concrete hydration heat reduction device further comprising the step of recirculating to the supply pipe pipe using the pump.

Images