KR101644111B1

KR101644111B1 - (Apparatus For Curing Concrete Structure

Info

Publication number: KR101644111B1
Application number: KR1020150173046A
Authority: KR
Inventors: 권영덕
Original assignee: 권영덕
Priority date: 2015-12-07
Filing date: 2015-12-07
Publication date: 2016-07-29

Abstract

The present invention relates to a concrete structure curing apparatus capable of optimizing concrete curing conditions according to an external environment to improve quality, energy savings, simplification of construction management, and cost reduction. His composition is; The present invention relates to a form plate assembly for curing a concrete structure used in constructing a molding, a building or a bridge made of concrete, which forms a three-dimensional space in which concrete is laid and is in direct contact with concrete; A form plate support for supporting the form plate assembly such that the form plate assembly has a three-dimensional shape; And heating means for heating the form plate assembly; The die plate assembly is in direct contact with the concrete, and comprises a die plate made of a steel plate; A support pipe for supporting the back surface of the form board in the same manner as the joist line; A heat insulating material adhered to the back surface of the form board and sandwiched between the support tubes; And a support beam supporting the support tube from below; And the heating means uses an electric force.

Description

(Apparatus For Curing Concrete Structure)

The present invention relates to a concrete structure curing apparatus, and more particularly, to a concrete structure curing apparatus capable of optimizing concrete curing conditions according to an external environment so as to improve quality, reduce energy, simplify construction management, To a curing device.

Reinforced concrete structures are laid out and installed in formwork,

It is built through the process of injecting and curing litt mortals. As the structure of the structure becomes increasingly complex, the form and function of the form have undergone many changes and developments. Structures are concepts that include buildings, sculptures and bridges. Conventional reinforced concrete bridge structures are classified into FSM (Full Staging Method), MSS (Movable Scaffolding System), FCM (Free Cantilever Method), ILM (Incremental Launching Method) and PSM (Precast Segment Method) according to the construction method. And the curing method of the cast concrete in the field can be largely divided into accelerated curing and wet curing.

The upper girders of the bridges are in situ casting and the accelerated curing (ILM, PSM) methods such as wet curing (FSM, MSS, FCM) or factory production are being implemented.

Wet curing (FSM, MSS or FCM method) is a method of curing and supplying water at the video temperature, and is generally carried out for construction works carried out from March to November for 9 months.

If the concrete is constructed during the winter (from December to the following February), the concrete should be temporarily covered with a vinyl tent in the windshield so that the concrete does not get wet before the initial curing, and the object ) Keep the surrounding temperature at the video temperature to cure the concrete.

The burner stove and the steam boiler are mainly used for the heater, and the lignite stove is economical but troublesome and the risk of fire is great. Also, it is necessary to pay attention to the gas poisoning by the manager because the harmful gas is released. Steam boiler is also not economical due to low heat insulation of vinyl tents and high temperature steam loss. When the object is cured by spraying with a high temperature steam, deformation of form occurs as the number of times of use is increased. Also, steam is frozen, Attention should be paid to safety accidents caused by falling accidents or slipping on the move.

FSM. MSS. In the winter of the FCM method, the temporary curing method of the concrete is curing the vinyl tent for windshield which is temporarily used because the insulation performance is low and the heat loss of the tent is very high.

It is very difficult to keep the temperature at the video temperature. Therefore, it is insufficient to supply the amount of heat required for initial curing of concrete, so that there is no promoting heat required for curing.

The accelerated curing is carried out in order to increase the turnover rate of the early demolded form by obtaining the required strength early in the molding of the concrete product and to use the product quickly. It is also called steam curing by using steam in general. The accelerated curing (ILM, PSM method) is a curing method using water vapor. The curing tent to cover the object and the steam supply pipe of the steam boiler are installed on the back of the steel formwork. In order to suppress the loss of steam, It is also practiced later.

The problems of accelerated curing can be summarized as follows.

In general, the environmental factors such as temperature and humidity have a close relation with the quality of concrete structure, such as strength degradation and cracking, when constructing concrete structures. Therefore, during the winter season, care should be taken not to freeze early after concrete pouring, and the wind should be prevented to avoid rapid temperature changes and water evaporation.

Conventional accelerated curing is a method of installing water vapor piping on the back of a steel formwork and curing the concrete by spraying hot water vapor through the piping. Concrete adjacent to the steam piping and concrete located away from the piping are hot Sudden temperature difference occurs due to water vapor, and it is likely to cause cracks due to temperature in the product. In addition, the steam pressure increases in the space between the steel formwork and the steam pipe insulation (styrofoam and vinyl), and the high temperature steam is lost at a high speed through the gap. Instead of recycling and reusing high-temperature steam generated from a large amount of energy, it is used as a one-time operation, resulting in excessive energy loss and costs. In addition, the steam boiler is bulky and has a long piping path of steam, resulting in high perfusion loss. Concrete curing steam boilers have fire and air pollution problems due to the use of large-scale oil storage facilities and petroleum, and there is also a problem of environmental pollution such as undeveloped groundwater due to excessive use of water which is the source of water vapor.

Korean Patent Application No. 10-2000-0066260

It is an object of the present invention to solve the above problems and to provide a method of continuously supplying concrete required for continuous curing without being restricted by the construction method (FSM, MSS, FCM) at a temperature below freezing in the winter season, (ILM, PSM) to hot water circulation system to supply heat to the circulating hot water. When hot, it can be equipped with a device (hot water boiler, cooler) for heating the concrete unnecessary for concrete curing, And to provide a concrete structure curing apparatus capable of minimizing environmental pollution, saving energy, simplifying construction, and reducing various costs.

The above object is achieved by curing a concrete structure used in constructing a concrete, a building or a bridge made of concrete,

A form plate assembly for forming a three-dimensional space in which concrete is poured and directly contacting with concrete;

A form plate support for supporting the form plate assembly such that the form plate assembly has a three-dimensional shape;

Heating means for heating the die assembly;

&Lt; / RTI >

The form plate assembly is in direct contact with the concrete, and comprises a form plate made of a steel plate; A support pipe for supporting the back surface of the form board in the same manner as the joist line; A heat insulating material adhered to the back surface of the form board and sandwiched between the support tubes; And a support beam supporting the support tube from below;

Wherein the heating means uses an electric force.

According to another aspect of the present invention,

The heating means may be a heating sheet heated by an electric force, and the heating sheet may be installed in a long, unidirectional manner so as to indirectly touch the entire area of the back surface of the woodworking mold through a waterproof protective film and a heat insulating material.

And may include a heat insulating material for suppressing temperature changes in the inside and outside of the object and for radiating the heat of the heat generating sheet toward the object.

According to another aspect of the present invention, the heating means heats the circulation pipe circulation water provided in a staggered manner on the back surface of the steel formwork board, and circulates heated hot water through the circulation pipe to heat the steel formwork board Which may be an electric boiler. Here, the circulation pipe may have a rectangular cross-sectional shape so as to be in surface contact with the back surface of the formwork to increase the heat transfer area.

According to another aspect of the present invention, there is further provided a cooling device for lowering the temperature of the steel formwork board, wherein the cooling means cools the circulation pipe circulation water installed in contact with the back surface of the steel formwork board in a staggered manner And a cooling device for reducing the temperature of the die by passing the cooled circulated water through the circulation pipe.

According to still another aspect of the present invention, there is provided a non-woven fabric comprising a non-woven fabric and a vinyl installed to cover a top surface of a concrete which does not come in contact with a form board after concrete is poured. A fog nozzle supplying means installed in the form plate assembly for spraying hot water onto the non- . According to another aspect of the present invention, the heat insulating material may be formed by spraying and fixing the back surface of the steel formwork board.

According to the above configuration, it is not possible to construct the concrete in place during the winter, but it is possible to construct the concrete during the winter season by installing the heat sheet and the thermal insulation material. The temperature is controlled by checking the temperature inside the concrete, Concrete can be produced with high quality without being frozen.

In addition, construction work is managed continuously without a period of rest in winter, construction cost can be saved, and continuous work without downtime can ensure high quality with skilled functions of workers.

According to the above construction, the concrete structure curing apparatus can be provided which can solve various problems associated with the use of high-temperature steam by replacing the heating of the mold with circulating hot water, and can improve the heat insulating function and minimize heat loss. More specifically, it is possible to produce high-quality concrete products having uniform strength by supplying necessary temperature and humidity required for curing in the winter concrete through the heating pipe and mist nozzle. In addition, when the concrete is poured into summer,

It is possible to cope with cracks occurring during curing. In addition, it is easy to adjust the heating device by automatically controlling the proper temperature for curing while checking the hydration heat inside the concrete. It is easy to cure concrete even in cold or unexpected weather, and energy saving and construction cost are reduced by using pipe with excellent heat exchange area and excellent insulation. In addition, the use of environmentally friendly electricity without using petroleum, which is a steam boiler fuel, is economical because there is no air pollution and maintenance cost is low. Also, the initial installation cost is economical due to the use of electric boiler compared to steam boiler. In addition, the use of circulating hot water without evaporating water vapor does not require a large amount of water, thereby reducing the cost of developing groundwater. Also, the boiler room and the oil storage facility are not separately needed, and the initial installation cost and maintenance are easy, which is economical. Above all, it is very economical because it produces hot steam and does not evaporate but uses hot water produced (circulated).

1 is a front view of a concrete structure to which the present invention is applied.
2 is a block diagram of a concrete structure curing apparatus according to an embodiment of the present invention.
FIG. 3 is a layer structure diagram of a concrete structure curing apparatus according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached hereto. Basically referring to FIG. 2, the remaining drawings are referred to where necessary.

The curing device for curing the concrete structure (C) as shown in Fig. 1 of the present invention. This curing device includes a die. Figure 1 illustrates in particular a bridge slab. The concrete structure (C) can be cured for various sculptures, buildings or bridges, and each requires a formwork. A curing device is used to shorten the air or cure well in the winter or summer.

The concrete structure curing apparatus of the present invention may be installed at a construction site or at a factory. The concrete structure curing device is built on the base plate 20 and is demolded or demolded after curing.

The concrete structure curing device basically forms a three-dimensional space in which concrete is poured, and has a form plate assembly to be in direct contact with concrete; And a form plate support for supporting the form plate assembly such that the form plate assembly has a three-dimensional shape. It further includes heating means for heating the form plate assembly. The form member supporting members include a plurality of length adjustable supports (7, 21). The supports (7, 21) are installed in the vertical direction to support the vertical load and also to support the side load in the horizontal direction.

The form plate assembly is in direct contact with the concrete C and comprises a plate 4 made of an iron plate and a support pipe 3 supporting the back surface of the plate 4 in the same manner as a joist, A heat insulating material 2 to be attached to the back surface of the board 4 and sandwiched between the support tubes and support beams 22, 22 ', 23, 23' or yoke supporting the support tube 3 from below. However, according to the embodiment of the present invention, the formwork board 4 may be made of wood (plywood).

The present invention is characterized by the heating method of the heating means. The heating means is means for transferring heat to the concrete (C) by heating the die (4). The heating means of the present invention uses electric force.

The heating means may comprise an electric boiler (8). The heating means comprises a circulation pipe (1) provided so as to contact in a zigzag form on the back face of the formwork (4), and a hot water heated by heating the circulation water is passed through the circulation pipe (1) And an electric boiler (8). The circulation pipe 4 may be made of aluminum, copper or synthetic resin. The temperature of the hot water may be adjusted according to various circumstances, for example, it may be 40 to 80 ° C. The present invention can recover the residual heat as compared with the conventional apparatus which uses the circulation pipe to discharge the used steam to the atmosphere. Therefore, the heat loss can be greatly reduced as compared with the conventional steam heating method.

According to the present embodiment, the circulation pipe 4 may have a rectangular cross-sectional shape so as to be in surface contact with the back surface of the die 4 so as to increase the heat transfer area. And may have an elliptical or rectangular cross-sectional shape as shown by bending the circular pipe and pressing it up and down.

The heating means according to another embodiment of the present invention may include a heating sheet 1 'heated by an electric force as shown in Fig. The heating sheet 1 'may be a planar heating element using carbon, or a heating element such as a heating mat may be arranged in a zigzag form. The electric wire 1a should be electrically connected to the heat generating sheet 1 '.

The heat generating sheet 1 'may be installed so as to indirectly contact the die 4 via the waterproof protective film 11. The heating sheet 1 'is advantageous in that the circulation pipe 1 does not need to be disposed, which makes the construction much easier and the temperature control is very easy. Since the heating sheet 1 'is likely to be damaged, it is not preferable to directly contact the die plate 4 made of an iron plate, and thus the protective film 11 is used. The heat generating sheet 1 'is lightweight and can be conveniently reused, and is flexible, so it can cope with various steric forms of concrete. For example, it can be easily bonded to curved concrete.

According to another embodiment of the present invention, it further comprises cooling means for lowering the temperature of the die 4. The cooling means includes a circulation pipe 1 installed so as to contact in a staggered manner on the back face of the formwork 4 and a cooling device 1 for cooling the water and lowering the temperature of the form plate 4 by flowing low- (9). This cooling means is used in the summer season to prevent the steel plate from becoming locally hot. The circulating water may be simply ground water or tap water, or it may be water cooled below room temperature by a refrigeration system.

According to another embodiment of the present invention, the nonwoven fabric 5 is disposed so as to cover the upper surface (exposed surface) of the concrete which does not come in contact with the formwork 1 after the concrete is poured. The water vapor supply means includes a plurality of spray nozzles 6 installed on the guide frame 26 of the form plate assembly so as to supply the hot water 6a in a spray form onto the nonwoven fabric 5; And a steam generator (10) for supplying the generated steam to the injection nozzle (6). The injection nozzle 6 is installed at the edge and sprayed hot water 6a in the lateral direction toward the upper surface of the concrete. The spray nozzle can spray the hot water 6a while rotating left and right by a predetermined rotating mechanism (not shown, refer to the rotating mechanism of the fan).

According to another aspect of the present invention, the heat insulating material 2 may be formed by spraying (urethane or epoxy spray) on the back surface of the dies 4 and fixing them. When the heat insulating material is adhered by spraying, the circulating pipe 4 used as the heating means or the cooling means is buried so that the circulating pipe 4 can be fixed.

Meanwhile, according to the embodiment of the present invention, since the formwork 4 can be used not only for the metal material but also for the wood (plywood), it can be employed in various formwork methods.

The above description is only an example based on the technical idea of the present invention. Those skilled in the art will recognize that various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims. For example, all embodiments described above may be freely combined and practiced by those skilled in the art, and any combination thereof should be construed as being included within the scope of the present invention.

1: Circulating piping 1 ': Heating sheet
1a: Wire 2: Insulation
3: Support tube 4:
5: nonwoven fabric 6: injection nozzle
6a: Hot water (in spray form) 7, 21: Support
8: Electric boiler 9: Cooling system
10: steam generator 11: protective film
20: base plate 22, 22 ', 23, 23'
C: Concrete (structure)

Claims

For curing a concrete structure used in the construction of a concrete, a building or a bridge,
A form plate assembly for forming a three-dimensional space in which concrete is poured and directly contacting with concrete;
A form plate support for supporting the form plate assembly such that the form plate assembly has a three-dimensional shape;
Heating means for heating the die assembly;
&Lt; / RTI >
The die plate assembly is in direct contact with the concrete, and comprises a die plate made of a steel plate; A support pipe for supporting the back surface of the form board in the same manner as the joist line; A heat insulating material adhered to the back surface of the form board and sandwiched between the support tubes; And a support beam supporting the support tube from below;
Wherein the heating means uses an electric force.

The method according to claim 1,
Wherein the heating means is a heating sheet heated by an electric force;
Wherein the heating sheet is installed so as to be in indirect contact with the die plate through a waterproof protective film.

2. The apparatus of claim 1, wherein the heating means comprises:
A circulation pipe installed on the back surface of the form board in a staggered manner;
And an electric boiler for heating the circulating water and heating the hot plate by passing the hot water through the circulating pipe.

The method of claim 3,
Wherein the circulation pipe has a rectangular or elliptical cross-sectional shape so as to be in surface contact with the back surface of the formwork so as to increase the heat transfer area.

The method according to claim 1,
Further comprising a cooling means for lowering the temperature of the form die;
Said cooling means comprising:
A circulation pipe installed on the back surface of the form board in a staggered manner;
And a cooling device for cooling the circulation water and lowering the temperature of the work plate by flowing low-temperature cooling water through the circulation pipe.

The method according to claim 1,
A nonwoven fabric installed so as to cover a top surface of the concrete which is not in contact with the form plate after the concrete is poured;
And water vapor supply means installed in the workpiece assembly to spray and supply water vapor onto the nonwoven fabric.

The method according to claim 1,
Wherein the heat insulating material is formed by spraying and fixing the back surface of the formwork board.