KR100619544B1 - Structure for Protecting the Surface of Concrete and Concrete Structure having the Same Protecting Structure, and Executing Method of the Same Concrete Structure - Google Patents

Abstract

Provided are a protector for protecting a surface of a concrete structure such as a large tank for water and sewage treatment, a bridge, or tanks, and a concrete structure having the same.

The concrete surface protector is a unit cell having a concrete filling space of the inner expansion type including a concrete escape prevention jaw is formed integrally protruding from the upper and lower sides to be filled with the concrete to be cured to the inside, and to block the departure from the concrete after curing. They are composed of a body member formed by gathering, and a surface protection member that is integrally attached to one side of the body member to block the concrete surface and the outside.

According to the present invention, the concrete is tightly filled into the body filling space of the protective body during the concrete casting, and since the separation of the protective body from the concrete after curing is completely prevented, the construction of the protective body is easy, and the separation after construction As well as being prevented, it is possible to effectively prevent the surface of the concrete structure from being corroded by moisture or other environmental factors to obtain an improved effect of preventing strength degradation and shortening of life.

Concrete surface protector, surface protector, filling space, concrete structure

Description

Structure for Protecting the Surface of Concrete and Concrete Structure having the Same Protecting Structure, and Executing Method of the Same Concrete Structure}             

1 is a perspective view showing a concrete surface protector of a first embodiment according to the present invention;

Figure 2 is a perspective view of the main portion showing the first concrete surface protector of the present invention

3 is a structural diagram showing a state of use of the first concrete surface protector of the present invention

Figure 4 is a structural diagram showing another embodiment of the first concrete surface protector of the present invention

5 shows a concrete surface protector of a second embodiment according to the present invention,

(a) a perspective view of the main part

(b) shows the state of use

6 shows a concrete surface protector of a third embodiment according to the present invention,

(a) a perspective view of the main part

(b) shows the state of use

Figure 7 is a use state showing the concrete surface protector of the fourth embodiment according to the present invention

8 illustrates a state in which the 1-4 concrete surface protector according to the present invention is used in a polygonal shape,

(a) is the main

(b) shows the state of use

9 is a view showing a state used in the form of stairs in the concrete surface protector according to the present invention,

(a) is the main

(b) shows the state of use

10 is a perspective view showing another modified use of the concrete surface protector according to the present invention

11 is a view showing the various applications of the concrete surface protector according to the present invention,

(a) is a schematic diagram showing the state used in the concrete structure of large tanks for water and sewage treatment

(b) is a schematic diagram showing the state used in the area in contact with the surface of the bridge

(c) is a schematic diagram showing the state used in the concrete structure where the upper surface is exposed to the outside while buried underground

Figure 12 is a schematic diagram showing the construction step of the structure having a concrete surface protector of the present invention the surface protection member is made of synthetic resin

Explanation of symbols on the main parts of the drawings

1,1a, 100,200,300 .... concrete surface protector

10,110,210,310 .... Concrete filling space

20,120,220,320 .... unit cell

30,130,230,330 .... Body member

50,150,250,350 .... Surface protection member

C, C1, C2, C3 ..... concrete or concrete structure

12,312 .... Breakaway jaw 112,212 .... Concrete through hole

114,216 .... Bulkhead 214,352 .... Turning

The present invention relates to a protector for protecting the surface of concrete structures such as large tanks, bridges, tanks, etc. for water and sewage treatment, and more specifically, is filled closely into the inner filling space of the protector during concrete pouring, curing It is not only possible to completely prevent the protection from the concrete, but also to effectively prevent corrosion of the surface of the concrete structure due to moisture or other environmental factors, thereby maintaining and extending the strength and the service life of the concrete structure. Of course, in particular, the concrete body is tightly filled and cured to a certain thickness of the body member, and a flat surface sign member is tightly attached to the body member, so that the surface protection member exposed to the outside after curing of the concrete is kept smooth and looks beautiful. If the surface protection member is a synthetic resin, concrete structure through heat fusion And the concrete surface to be protected to facilitate the construction relates to a concrete structure and its construction method having the same.

At present, techniques for protecting the surface of large tanks for water and sewage treatment, top plate support structures of bridges, tanks or other concrete structures of buildings are known.

For example, after curing of a concrete structure using a formwork, it is generally known to prevent corrosion of the concrete surface by applying a corrosion inhibitor to the surface of the concrete structure.

However, the application of anti-corrosion material, for example, anti-corrosion paint, on the concrete surface after it is simply cured, initially protects the surface of the concrete to some extent, but the surface of the concrete is exposed to the passage of time and the corrosion caused by moisture. As mold or mold is generated, the surface strength of the concrete structure is lowered, and the appearance is not beautiful.

In addition, it is known to protect the surface of concrete by attaching a protective sheet to the surface of concrete by curing a thin sheet on the concrete surface when placing concrete in a formwork in another manner.

In this case, a small V-shaped fixture is usually provided on the rear side of the sheet so that the sheet is attached to the surface of the concrete.

However, when the sheets are attached in this way, the actual sheets are very thin and the fixtures are arranged at intervals, and when the concrete is cured through the formwork, the sheets are shrunk and the exterior is not kept smooth.

On the other hand, Korean Patent Laid-Open Publication No. 2000-0032500 discloses a method for strengthening the surface of a concrete structure.

However, in the method of reinforcing the surface of the concrete structure disclosed in the above publication, the structure of attaching the concave-convex sheet to the concrete surface is weakened over time as the strength of the sheet is attached to the concrete surface, which is filled with concrete. This is because there is no close contact structure when the concrete is cured in the seat space, and the material is easily shrunk from the surface of the concrete structure due to the material detachment that causes the concrete structure to shrink finely after curing the concrete. If the sheet is made of stainless metal, it is difficult to maintain the adhesion strength.

Therefore, in the conventional concrete surface protection sheet or the method known so far, the surface protection sheet is easy to occur after the concrete curing, or it does not remain smooth even if it does not escape from the concrete, but it does not remain smooth and looks beautiful There were several problems, such as not doing.

Accordingly, the concrete is closely filled in the interior filling space of the protector so that the curing is prevented from being released from the concrete, while the surface protection member is kept smooth after curing, making the appearance beautiful and easy to construct. There has been a need for concrete surface protectors and concrete structures or construction methods thereof.

The present invention has been made in order to solve the above conventional problems, the purpose of which is the concrete is tightly filled with the inner filling space of the protector during concrete pouring, completely prevents the departure of the protector from the concrete after curing As a result, the protection body is easy to install concrete, and the separation after construction is prevented, as well as the concrete body is tightly filled and cured. The surface protection member exposed to is kept smooth without wrinkles to provide a concrete surface protection body that is beautiful in appearance.

Another object of the present invention is to provide a concrete surface protector which does not depart from concrete, and thus effectively prevents the surface of the concrete structure from corroding with moisture or other environmental factors after curing. And a concrete structure having a concrete surface protector for maintaining and extending its service life.                         

In addition, another object of the present invention, when the surface protection member of the protective body is a synthetic resin to provide a construction method of a structure having a concrete surface protector to facilitate the construction of the concrete structure in a temporary bonding method more easily. It's there.

The present invention as a technical embodiment for achieving the above object, in the protector for protecting the surface of the concrete structure, is filled with concrete to be cured inward, so as to block the departure from the concrete after curing A body member comprising unit cells having a concrete filling space of an internal extension type, including a concrete escape prevention jaw formed integrally protruding from the lower side; And,
A surface protection member integrally attached to one side of the body member to block the concrete surface and the outside;
By providing a concrete surface protector consisting of.

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In another aspect, the present invention, in the protector for protecting the surface of the concrete structure, is filled with concrete that is cured inward, and provided with a barrier rib-filled filling space to block the departure from the concrete after curing. A body member composed of one unit cell; And,

A surface protection member integrally attached to one side of the body member to block the concrete surface and the outside;

By providing a concrete surface protector configured to include.

And, as another technical embodiment of the present invention, in the protector for protecting the surface of the concrete structure, filled with the concrete to be cured inward, the barrier and protrusion-type filling to block the separation from the concrete after curing A body member composed of unit cells having a space; And,
A surface protection member integrally attached to one side of the body member to block the concrete surface and the outside;
By providing a concrete surface protector configured to include.

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In another aspect, the present invention is to provide a concrete structure having a concrete surface protector of one of the above embodiments.

Finally, as another technical aspect, the present invention comprises the steps of fixing the concrete surface protector, the surface protection member is a synthetic resin inside the formwork;

Injecting hot-gas through the holes of the form to weld the surface protecting member made of synthetic resin of the protector to temporarily attach the form to the form; And,

Filling and curing concrete in the formwork to which the protector is temporarily bonded, and cooling the surface protection member of the protector to separate and detach the formwork from the structure;

By providing a method of constructing a concrete structure including a.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the various embodiments, the same components will be described by the same reference numerals, and the related components will be described by reference numerals of 100 units.

First, Figures 1 to 3 show a first embodiment of the concrete surface protector according to the present invention.

That is, as shown in Figure 1, the first concrete surface protector (1) according to the present invention is filled with the concrete to be cured inward, the internally expandable filling space (10) to block the departure from the concrete after curing It is composed of a body member 30 having a unit cell 20 having a) and a surface protection member 50 is integrally attached to one side of the body member 30 to block the concrete surface and the outside.

At this time, the internal expansion type filling space 10 formed in the body means 30 is formed in the internal space expansion type by the concrete separation prevention projection 12 formed integrally protruding from the upper and lower sides of the unit cell 20. Will be.

Therefore, as shown in Figure 2, the oval unit cells 20 are integrally formed to form a body member 30 of the plate as a whole, and the separation prevention jaw provided on the upper and lower sides of the unit cells (20) ( After the inner space is expanded by the internal expansion filling space (10) is expanded by the 12) it is possible to completely prevent the departure of the protector (1) from the cured concrete (C).

At this time, the first concrete surface protector 1 of the present invention, since the separation preventing jaw (12) is formed in the upper and lower sides of the unit cell, in actual production, after the reverse V-shaped unit cells are integrated in series, these unit cells are connected in series The upper part and the lower part of the phosphorus are integrally connected to the body member 30 can be manufactured.

In addition, the body member 30 is elastic, it is preferable to produce a synthetic resin, such as polyethylene (PE), polypropylene (PP), such as rolled up the body member 30 to store or move,

In addition, the surface protection member 50 may be a material that blocks the concrete surface from the outside, for example, a corrosion resistant synthetic resin resistant to corrosion such as moisture, preferably reinforced plastic (FRP) or tube having a certain strength Beautiful stainless steel sheet or iron sheet may be used, and in the case of synthetic resin (sheet), it may be attached to the upper surface of the unit cell of the body member 30 of the synthetic resin by a heat fusion method or by using an adhesive. In the case of stainless steel or iron sheet, the adhesive is tightly bonded.

In addition, in the following other embodiment, the surface protection member 50 is shown by the code | symbol of 100 unit, The structure is the same as the 1st concrete surface protection body 1, and the description is abbreviate | omitted below.

Therefore, as shown in Figure 3, by placing the first concrete surface protector (1) of the present invention on the inner surface of the formwork not shown in the drawings and cast concrete on the formwork of the body member 30 of the protector Curing in the state of filling the internal expansion type filling space 10, and removing the formwork, since the surface of the concrete structure (C) is protected from the inside of the protective body surface protection member 50 of the present invention, Various problems such as corrosion of the concrete surface does not occur, and in particular, the appearance of the concrete structure (C) will be very beautiful, although there are differences depending on the material of the surface protection member 50.

At this time, the body member 30 of the concrete surface protector of the present invention and the body members 130, 230, 330 of the second embodiment 4-4 described later have a thickness of about 15mm and the surface of a certain thickness Since the protective members 50, 150, 250 and 350 are closely attached, concrete is poured from the formwork and filling curing in various types of filling spaces 10, 110, 210 and 310 inside. Afterwards, the surface protection members exposed to the outside of the concrete structure can maintain a smooth state, so that the conventional concrete surface protection sheet and the like are prevented from being shuffled, which provides an advantage that the appearance is beautiful.

Next, FIG. 4 shows another embodiment (1a) of the first concrete surface protector 1 of the present invention, which is used by cutting the first concrete surface protector. It is preferably formed on the opposite side of the protective member (50).

Accordingly, as shown in FIG. 4, the protector is firmly concrete while being prevented from leaving the cured concrete C filled and cured in the semi-expanded filling space 10 by the escape stop 12 at the opposite side of the surface protection member 50. It will be attached to the surface of the (structure).

Next, FIG. 5 shows a second embodiment of the concrete surface protector according to the present invention.

That is, as shown in Figure 5a, the second concrete surface protector 100 of the present invention is filled with the concrete to be cured inward, partition wall protrusion filling space 110 to block the separation from the concrete after curing. The unit cell 120 having a unit is composed of a body member 130 and a surface protection member 150 is integrally attached to one side of the body member 130 to block the concrete surface and the outside.

In this case, the partition wall protrusion filling space 110 formed inside the body member 130 is integrally formed horizontally at an inner central portion of the unit cell 120, and at least one concrete through hole 112. The partition wall 114 is formed as a partition wall protrusion filling space.

In addition, the partition wall connecting portion 120a of the body member unit cell 120 in which the partition wall 114 is horizontally formed in the center is preferably formed convex for maintaining strength.

Therefore, as shown in Figure 5b, after placing the second concrete surface protector 100 of the present invention in the formwork and pouring the concrete (C) so that the concrete is filled in the bulkhead protrusion filling space 110, curing When the formwork is removed, the concrete (C) is cured while being closely filled through the concrete through-hole 112 formed in the partition wall 114 of the filling space, the concrete (structure) C of the present invention in the second Departure of the protective sleeve 100 is more surely prevented than the first protective member 1.

However, the second concrete surface protector 100 of the present invention may be installed in a place where the wind is bad or the external environment is poor.

At this time, the surface protection member 150 is the same as the first concrete surface protection body (1).

Next, Fig. 6 shows a third embodiment of the concrete surface protector according to the present invention.

That is, as shown in Figure 6a, the third concrete surface protector 200 of the present invention is filled with the concrete to be cured inward, the partition and protrusion-filled filling space (blocking the separation from the concrete after curing) Unit member 220 having a unit 210 is formed of a body member 230 and a surface protection member 250 is integrally attached to one side of the body member 230 to block the concrete surface and the outside. .

In addition, the barrier ribs and the protrusion-filled filling space 210 are horizontally integrally formed at an inner central portion of the body member unit cell 220 and protrude upward and downward with at least one concrete passage hole 212. The barrier rib 216 having the 214 is provided as a barrier rib and a protrusion filling space.

At this time, the partition wall connection portion 220a of the body member unit cell 220 in which the partition wall 216 is horizontally formed in the center may be formed to be convex for maintaining strength.

Therefore, as shown in Figure 6b, after placing the third concrete surface protector 200 of the present invention in the formwork and pouring the concrete (C) so that the concrete is filled in the partition wall and protrusion-filled filling space 210 When cured to remove the formwork, the concrete (C) is closely filled through the concrete through hole 212 formed in the partition wall 216 of the filling space, and at the same time, the projections 214 formed perpendicular to the partition wall 216 and Since the second protective member 200 of the present invention is cured closely after filling closely, the protective member is more reliably released from concrete than the first and second concrete surface protective members 1 and 100 described above. Prevent it.

As a result, the third concrete surface protector 200 of the present invention has a specific location, for example, where corrosion is most frequently caused by contact with water at all times, or where rain frequently occurs, or when the temperature difference is severe, expansion or contraction is repeatedly generated. It would be desirable to be provided to the concrete structure C of the site.

At this time, the surface protection member 250 is the same as the first and second concrete surface protector.

Next, Fig. 7 shows a fourth embodiment of the concrete surface protector according to the present invention.

That is, as shown in Figure 7, the fourth concrete surface protector 300 of the present invention, the rectangular unit cells 320 forming the concrete filling space 310 is filled with concrete to be cured inward is integrated The body member 330 is configured to be integrally attached to one side of the body member 330 to be in close contact with the concrete to prevent the separation from the concrete to protrude through the filling space 310 It is provided, and is composed of a projection-type surface protection member 350 to block the concrete surface and the outside.

At this time, it is preferable that a protrusion head 352a for increasing the contact force with the concrete is further formed at the upper end of the contact protrusion 352 of the protrusion-type surface protection member 350.

That is, the fourth concrete surface protector 300 of the present invention is characterized in that the protrusion 352 is formed integrally with the surface protection member 350 to increase the adhesion to the concrete (C), in this case the surface protection member ( 350 is formed of synthetic resin, for example, reinforced plastic (FRP) to form the protrusion 352 integrally.

Therefore, the body member 330 of the fourth concrete surface protector 300 of the present invention is made of only a rectangular unit cell 320 formed of an inner filling space 310 while being made of synthetic resin by simplifying its structure. Instead of providing a projection 352 to the surface protection member 350 to prevent the departure from the concrete, in this case it is used when a protector that functions as a finishing material to make the exterior of the concrete wall inside the building beautiful Would be desirable.

Next, FIGS. 8 and 9 illustrate bending means for facilitating the actual construction of the 1-4 concrete surface protector (1) (100) (200) (300) described so far.

That is, this bending means is to enable the inward or outward bending of the surface protection member according to the shape of the concrete structure (C), for example, as shown in Figure 8, the body member bending means is a concrete structure ( Slope to enable close contact with the body members 30, 130, 230, 330 of the 1-4 concrete surface protectors 1, 100, 200, 300 at the corners when C) is a polygon. It may be provided as a type (V type) cutout 70a.

Alternatively, as shown in FIG. 9, when the concrete structure C is stepped, the body members 30, 130, and 230 of the first to fourth concrete surface protectors 1, 100, 200, and 300. The vertical cutout 70b, which enables outward bending (folding to 90 or more) of the 330s, or both may be provided with 70a and 70b.

Therefore, as shown in FIGS. 8 and 9, the first to fourth concrete surface protectors of the present invention can be easily constructed corresponding to the shape of the concrete surface structure (C).

Next, in FIG. 10, the 1-4 concrete surface protectors (1) (100) (200) (300) of the present invention are provided at both sides, and the concrete (C) is cured in a unit form to form the concrete structure (C). One single block is shown.

Concrete blocks with such block surface protection can be manufactured in an automated facility, it is a single product is easy to distribute or application to buildings using the same.

Next, FIG. 11 shows various examples of concrete structures having the present invention 1-4 concrete surface protectors 1, 100, 200, and 300.

For example, as shown in FIG. 11A, concrete structures C1 such as large tanks and tanks for treating water and sewage, or as shown in FIG. 11B, may be used for the upper plate support structures C2 of bridges. Since all of the corrosion of the concrete structure surface is easily generated by moisture, constructing a corrosion resistant protector together will prolong the life of the concrete structure, while preventing self-pollution by corrosion and enhancing the appearance of the structure.

Next, FIG. 11C illustrates a concrete structure C3 having a concrete surface protector made of stainless steel or iron plate, and having the cover exposed outside.

Therefore, in this case, only the protection part of the surface part of the concrete structure will be mainly visible, and in the case of stainless steel or iron plate, it is possible to attach and attach other structures to the stainless steel plate or the stainless steel plate, especially after constructing the concrete structure first. It can be more firmly attached to the structure than attaching a finishing material such as stainless thereon.

Next, in FIG. 12, the surface protection members 50, 150, 250, and 350 in the first to fourth concrete surface protectors 1, 100, 200, and 300 of the present invention are reinforced with synthetic resin, for example. The construction of the concrete structure of the protector in the case of plastic is shown.

That is, the 1-4 concrete surface protector (1) (100) 200 (300) of the present invention is applied to one of the formwork T, and hot through the holes (T ') formed in one formwork (T). -When the gas (hot-gas) is injected, the surface protection members 50, 150, 250, 350 of the synthetic resin are welded to the formwork as heat, and then temporarily bonded to the formwork. When the concrete (C) is poured and cured, the protective body of the present invention can be firmly and firmly installed on the concrete structure.

Next, when the concrete is poured or cured, the surface-protection member that is temporarily melted by hot-gas is cooled and proceeds without difficulty when removing the structure of the formwork T. In this case, the hot-gas injection site is as small as possible Injecting through the holes would be preferable because it would not damage the appearance of the surface protection member.

As a result, in the method of constructing a concrete structure having a protective body made of synthetic resin, the surface protection member of the present invention is filled with curing while partially fused by using hot gas to formwork, so the construction work is very easy. It is.

As described above, according to the present invention, the concrete surface protector, the concrete structure having the same, and the construction method thereof, the concrete is tightly filled into the inner filling space of the protector when the concrete is poured, and the curing body is completely removed from the concrete after curing. This prevents the protection body from being easily installed in concrete, prevents the breakage after construction, and effectively prevents the surface of the concrete structure from being corroded by moisture or other environmental factors, thereby improving the strength and service life of the concrete structure. It is to provide an excellent effect of maintaining and extending.

In particular, it is very convenient to construct and use because the shape of the concrete structure can be easily corresponded to the angled part, and the body member of constant thickness is filled with concrete and cured, and the flat surface sign member is attached to the body member. Since the surface protection member exposed to the outside after concrete curing is kept smooth, it is also beautiful in appearance.

In addition, when the surface protection member of the concrete surface protector is a synthetic resin, it is possible to easily attach and cure the protector to the surface of the concrete structure using hot-gas, thereby providing another excellent effect of facilitating its construction.

While the invention has been shown and described in connection with specific embodiments so far, it will be appreciated that the invention can be varied and modified without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

Claims (20)

In the protector for protecting the surface of the concrete structure, A body member configured to be filled with concrete that is cured inward, and unit cells having an internally expanded concrete filling space including a concrete escape prevention jaw formed integrally protruding from the upper and lower sides to block the departure from the concrete after curing; And, A surface protection member integrally attached to one side of the body member to block the concrete surface and the outside; Concrete surface protector, characterized in that configured to include. delete In the protector for protecting the surface of the concrete structure, The body member is filled with the concrete is cured to the inside, the body member consisting of unit cells having a partition wall protrusion filling space for blocking the departure from the concrete after curing; And, A surface protection member integrally attached to one side of the body member to block the concrete surface and the outside; Concrete surface protector, characterized in that configured to include. The partition wall protrusion filling space formed in the body member is integrally horizontally formed at an inner central portion of the unit cell, and is partitioned by a partition wall having at least one concrete through hole formed therein. Concrete surface protector, characterized in that consisting of a filling space. In the protector for protecting the surface of the concrete structure, A body member which is filled with concrete to be cured inward, and unit cells having a partition wall and a protrusion-filled filling space for blocking departure from the concrete after curing; And, A surface protection member integrally attached to one side of the body member to block the concrete surface and the outside; Concrete surface protector, characterized in that configured to include. The barrier rib of claim 5, wherein the barrier rib and the protrusion filling space are integrally horizontally formed at an inner central portion of the body member unit cell, and the barrier rib is formed by a barrier rib having at least one concrete passage hole and protrusions protruding up and down. And a protrusion-filled filling space. delete The method according to any one of claims 1, 3 and 5, further comprising a body member bending means for enabling the inward or outward bending of the surface protection member according to the shape of the concrete structure, The body member bending means is one of the inclined incision to enable the close contact of the body member in the corner when the concrete structure is polygonal, and the vertical incision to enable the outward bending of the body member when the concrete structure is stepped, or Concrete surface protector, characterized in that consisting of all. delete The concrete surface protector according to any one of claims 1, 3, and 5, wherein the body member is formed of a synthetic resin. 6. The concrete surface protector according to any one of claims 1, 3, and 5, wherein the surface protection member is made of synthetic resin. 12. The concrete surface protector of claim 11, wherein the synthetic resin is formed of Fiberg lass Reinforced Plastic. 6. The concrete surface protector according to any one of claims 1, 3, and 5, wherein the surface protection member is made of stainless steel. The concrete surface protector according to any one of claims 1, 3, and 5, wherein the surface protection member is made of a steel plate. The concrete structure provided with the concrete surface protector as described in any one of Claims 1, 3, and 5. The concrete structure according to claim 15, wherein the concrete surface protector is provided on both sides of the structure to block the concrete surface. The concrete structure according to claim 15, wherein the concrete structure comprises one of a large tank for water and sewage treatment, a top plate supporting structure of a bridge, or tanks. A concrete structure comprising the concrete surface protector according to claim 13, wherein the protector is embedded in the ground while being exposed to the outside. A concrete structure comprising the concrete surface protector according to claim 14, which is embedded in the ground while the protector is exposed to the outside. Fixing the concrete surface protector according to claim 11 to the inside of the formwork; Injecting hot-gas through the holes of the form to weld the surface protecting member made of synthetic resin of the protector to temporarily attach the form to the form; And, Filling and curing concrete in the formwork to which the protector is temporarily bonded, and cooling the surface protection member of the protector to separate the form from the structure; Construction method of concrete structure with concrete surface protector configured to include

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