KR102261721B1 - Covered plate for preventing crack when curing of concrete - Google Patents

Abstract

By protrudingly forming a plurality of contact protrusions on the curvature and installing the curved plate so that the contact protrusions are in close contact with the corners of the formwork, it is possible to prevent cracks that usually start at the corners of the openings. In particular, by forming the contact protrusions into a cylindrical shape with a minimum gap, the contact protrusions are exposed to the outside after curing the concrete, while maximizing the contact area between the contact protrusions and the formwork before concrete pouring, allowing cracks to occur. can be minimized. In addition, by penetrating two inlet holes on each of the two surfaces, the aggregate is sandwiched or spanned between the formwork and the curved plate through the inlet hole to resist stress through these aggregates, thereby preventing load distribution, temperature change, and drying shrinkage. cracking can be prevented.

Description

COVERED PLATE FOR PREVENTING CRACK WHEN CURING OF CONCRETE

The present invention relates to a curved surface plate for preventing cracks, and more particularly, by protruding a contact protrusion so that the curved portion can come into contact with the entrance of the opening, the cracks likely to occur in the corner of the opening are prevented from proceeding further to prevent cracks. that could have been prevented. In addition, since a sawtooth shape is formed in the inlet hole through which the concrete flows between the curved plate and the formwork, it is possible to enhance the crack prevention effect while curing the aggregate firmly by preventing the aggregate and the like from coming off.

In general, when manufacturing the form (M) to construct the wall by pouring concrete (C) as shown in [Fig. 1] and [Fig. 2], it is manufactured to form an opening for window and door construction. At this time, a stress distribution plate (P') is mounted in the form (C) so that it can be embedded in the concrete (C) in the form (C) because the edge of the opening may crack due to the temperature difference during stress concentration and curing of the concrete. Such a stress dissipation plate is produced and used in various forms as shown in the following (Patent Document 1) to (Patent Document 3).

(Patent Document 1) Korea Registered Utility No. 20-0417507

It relates to a means for preventing cracks in concrete, in particular, to prevent cracks occurring after plastering in the corner of the wall connected to the floor or the corner of the window frame or door frame, so that it can be attached to the corner of the wall or the corner of the door frame or window frame Provided is a concrete crack prevention device comprising a circular band-shaped crack prevention plate partially open and an attachment plate formed integrally with the open part of the crack prevention plate and forming a right angle to each other.

(Patent Document 2) Korean Patent No. 10-1022708

This is a stress distribution plate to prevent sine cracks occurring at the corners of square openings in the construction of various concrete structures. The principle that cracks do not occur around the openings when non-square, circular openings are installed in reinforced concrete structures. By installing a curved stress distribution plate at the corner of a square opening using the , it is possible to improve the aesthetics of the building and reduce crack repair costs due to the non-occurrence of cracks, and to prolong the life of the structure by securing the durability of concrete. It is possible to reduce material cost and labor cost by using alternative use of signage crack prevention rebar, and because it is installed in a location and space where there is no interference with reinforcing bars, it is very easy to improve construction while effectively preventing cracks in the opening of the structure. As countermeasures are established, it is possible to design and construct concrete structures with more various types of openings and exteriors.

(Patent Document 3) Korean Patent No. 10-1613702

In the construction of various reinforced concrete structures, it is about a stress-dispersing curved surface plate to prevent sinusoidal cracking due to drying shrinkage in the initial curing period that occurs at the corner of a square opening, and more specifically, a straight part and a curved part are formed integrally. In the stress dispersing curved surface plate with the concrete inlet hole formed, an elastic flow part is formed by a support and a horizontal bar at the tip of the stress dispersing curved plate, and a reinforcing guide and an induction guide opposite to each other are formed at the tip of the curved part and the lower end of the horizontal bar, , while forming a large concrete filling part and expanding the area of the curved surface, while improving the bonding of the stress-dissipating curved plate to be simple and robust, the stress-dispersing curved plate flows or deforms due to interference with the formwork due to construction errors, and as a result, the reinforcing bar is damaged. It prevents flow and facilitates concrete filling, makes bonding with reinforcing bars simple and strong, and increases the area of the curved surface to obtain a more efficient stress dissipation effect, thereby improving the aesthetics of the building and reducing the cost of repairing cracks. It saves money, and it is possible to extend the lifespan of the structure by securing the durability of concrete. It is light and easy to install and saves costs because it is manufactured from synthetic resin with the best stress reduction effect. Stress dispersing curved plate replaces reinforcing bars and is recycled The use of synthetic resins can be expected to save resources.

However, the existing stress-dispersion curved plate has the following problems.

(1) A gap occurs at the edge of the curved dispersion plate and the opening, and the cracks that start at this edge progress to the curved dispersion plate and become visible from the outside after the building is constructed. .

(2) Mortar can permeate between the formwork forming the opening and the curved dispersion plate, but aggregates that can reinforce rigidity, such as gravel, are filtered through the curved dispersion plate, and construction is made between this form and the curved dispersion plate. There is a limit to preventing cracks in the signed field only with the mortar filled in.

(3) As the contact portion of the stress-dispersing curved plate that is in close contact with the inner surface of the form used for making openings for window and door construction is widened, as the form is removed, the area exposed to the outside of this stress-dispersing curved plate increases, which may impair the aesthetics. In addition, there is a risk of weakening the rigidity of concrete and inducing cracking.

Korea Registered Utility No. 20-0417507 (Registration Date: May 23, 2006) Korean Patent No. 10-1022708 (Registration Date: 2011.03.09) Korean Patent No. 10-1613702 (Registration Date: 2016.04.12)

The present invention is made in consideration of this point, so that several contact protrusions are formed to protrude from the curvature part formed to be bent in the middle part, and the curved surface plate can be installed so that these contact protrusions are closely attached to the edge part of the form used to manufacture the opening. An object of the present invention is to provide a curved surface plate for preventing cracks that can prevent cracks that normally start at the corners of the openings from occurring by configuring them.

In particular, the present invention forms such a contact protrusion in a cylindrical shape of 4 to 6 mm (most preferably 5 mm), and is produced with an interval of 4 to 6 mm (most preferably 5 mm) between adjacent contact protrusions. By doing so, it is possible to minimize the exposure of the contact protrusion to the outside after curing the concrete, and to maximize the area where the contact protrusion contacts the formwork before concrete pouring to minimize the space where cracks can occur. has a different purpose.

In addition, the present invention is formed by penetrating at least two inlet holes each having a length of (80 to 95) mm × (55 to 65) mm on two surfaces integrally formed on both sides of the curvature, thereby forming aggregates such as gravel. For preventing cracks, which is sandwiched between the formwork and the curved plate through the inlet hole or spanned through the inlet hole to resist the sinusoidal stress through these aggregates to prevent cracking due to load distribution, temperature change, and drying shrinkage. Another object is to provide a curved surface plate.

The curved surface plate for preventing cracks according to the present invention for achieving this object is integrally formed using a flexible material so that the two surfaces 110a and 110b facing each other are at right angles or obtuse angles through the curved curvature portion 120 as a medium. It includes a main body 100; but, in the main body 100, a plurality of connecting protrusions 130 are formed to protrude from one curved edge, and the other curved edge is connected to a position facing the connecting protrusion 130 The chin portion 140 formed through the hole 141 is formed to protrude into the curved inner side of the main body 100; on the surfaces 110a and 110b, the length of each of the two sides is (80-95) mm × At least two inlet holes 111 of (55 to 65) mm are formed through, but the entire edge of the inlet hole 111 has a sawtooth shape 112; It is characterized in that the contact protrusions 121 are formed to protrude in three rows so that two adjacent to each other maintain the same distance.

In particular, in the surfaces 110a and 110b, the length of the side A parallel to the curved portion 120 is 125 to 145 mm, and the length of the side B in contact with the curved portion 120 is 90 to 110 mm, and the curvature portion 120 has a width (W) of 25 to 35 mm in plan view.

In addition, the contact protrusion 121 is formed in a cylindrical shape having a diameter of 4 to 6 mm, and the interval between the two adjacent ones is 4 to 6 mm.

Finally, the main body 100 is characterized in that the thickness is 1.5 to 3.5 mm.

The curved plate for preventing cracks according to the present invention has the following effects.

(1) Concrete can be poured by installing the curvature part connecting the two faces in close contact with the edge of the formwork that forms the edge of the opening. progress can be prevented.

(2) In particular, since the angle formed by the two surfaces is a right angle or an obtuse angle, it can be used according to the angle formed by the opening or installed by bending the curved plate, so that no matter how the opening is manufactured, use the curved plate to prevent cracking. can do.

(3) At this time, contact protrusions are formed on the curvature part in contact with the corners of the opening, but the adjacent contact protrusions are manufactured to have the same spacing, so that the stress concentrated on the corners of the opening is uniformly distributed to minimize cracks. can

(4) In addition, the contact protrusions are arranged in at least two rows, preferably three rows, and two adjacent contact protrusions are formed to be 4 to 6 mm, so that several contact protrusions are densely formed to closely adhere to the edge of the opening. It helps to prevent cracks by allowing the concrete to permeate between the contact protrusions and form integrally.

(5) On the other hand, since at least two inlet holes having a length of (80 to 95) mm × (55 to 65) mm of two sides are formed through the two surfaces constituting the body, a formwork and a curved plate for forming an opening Through this inlet hole in between, aggregates such as gravel can freely pass in and out, thereby dispersing the stress concentrating on the corners, thereby increasing the crack prevention effect.

[Fig. 1] and [Fig. 2] are prior art views showing the mounting position of the stress distribution plate.
[FIG. 3] is a perspective view showing the overall configuration of the curved plate for preventing cracks according to the present invention.
[Fig. 4] is a front view showing the overall configuration of the curved plate for preventing cracks according to the present invention.
[Fig. 5] is a plan view showing the overall configuration of the curved plate for preventing cracks according to the present invention.
[Fig. 6] is a perspective view showing an example in which two curved anti-cracking plates according to the present invention are connected and extended in the width direction.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor may properly define the concept of the term in order to best describe his invention. It should be interpreted as meaning and concept consistent with the technical idea of the present invention in accordance with the principle that can be.

Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only one most preferred embodiment of the present invention and do not represent all the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that there may be variations and examples.

(Configuration)

The curved plate for preventing cracks according to the present invention is made of a flexible material so that the two surfaces 110a and 110b integrally formed on both sides of the curvature portion 120 are at right angles or obtuse angles, as shown in FIGS. 3 to 6 . It includes a body 100 formed integrally by using.

In particular, by forming a plurality of contact protrusions 121 in three rows to protrude the curved portion 120 to be in close contact with the mold portion corresponding to the corner portion of the opening, the curved surface plate is in contact with the edge portion of the mold while firmly in close contact. The concrete is allowed to permeate between the projections 121 and hardened to minimize the occurrence of cracks so that it can be used safely.

At this time, the contact protrusion 121 is manufactured in a cylindrical shape having a diameter of 4 to 6 mm, and by configuring the interval between two adjacent two to be 4 to 6 mm, between the curved portion 120 and the edge of the opening It allows a sufficient amount of concrete to permeate while increasing the contact area so that the concrete can be cured in one body.

In addition, since at least two inlet holes 111 having a length of two sides of (80 to 95) mm × (55 to 65) mm are formed through the surfaces 110a and 110b, aggregates such as gravel constituting concrete It is made possible to reduce the occurrence of cracks by preventing the stress concentration by allowing it to flow between the formwork and the curved plate to resist the sinusoidal stress.

Hereinafter, such a configuration will be described in more detail with reference to the accompanying drawings. Here, the formwork is used when constructing a building, and in particular, it refers to use when constructing a wall having an opening for forming an entrance door or a window.

end. main body

The main body 100, as shown in [Fig. 3] to [Fig. 5], the two surfaces (110a, 110b) are connected to the curved portion 120 is formed integrally. In particular, the two surfaces 110a and 110b are made of a flexible material to form a right angle or an obtuse angle. Here, as the flexible material, it is most preferable to use a synthetic resin.

In a preferred embodiment of the present invention, the main body 100 is preferably configured to have a thickness of 1.5 to 3.5 mm and to be easily deformed with flexibility or to be easily deformed to fit the shape of the formwork.

In addition, in the main body 100, as shown in [Fig. 3] to [Fig. 5], the above-described two surfaces 110a and 110b, a curvature portion 120, a connecting protrusion 130, and a chin portion 140. includes

I. if

The surfaces 110a and 110b are formed integrally on both sides of the curvature portion 120 to be described later, respectively, as in [Fig. 3] to [Fig. 5], and by making the interior angles facing each other a right angle or an obtuse angle, it is usually The curved plate according to the present invention is installed inside the mold in the form of enclosing the corner of the opening of the window produced in a rectangular shape, or the curved plate according to the present invention is installed inside the mold by bending the body 100 of a flexible material to fit it, even if it is not a right angle. configure it to be installed.

In particular, at least two inlet holes 111 are formed through each of the surfaces 110a and 110b as shown in FIGS. 3 and 4 . The inlet hole 111 forms a hole through which aggregate such as gravel constituting the concrete can enter between the curved plate and the formwork according to the present invention. Accordingly, the inlet hole 111 is preferably formed in a rectangular shape having a size that aggregates can pass in and out, preferably having a length of two sides of (80 to 95) mm × (55 to 65) mm.

At this time, the inlet hole 111 is, as in [Fig. 3] and [Fig. 4], by forming a sawtooth shape 112 on the entire edge, the aggregate that has passed through the inlet hole 111 can easily come out or aggregate It is preferable to configure it so that the resistance to resist the sinusoidal stress can be increased.

These surfaces (110a, 110b), as in [Fig. 4] and [Fig. 5], the length of the side (A) parallel to the curvature portion 120 to be described later is produced to be 125 to 145 mm, and the curvature portion 120 ) and the length of the side (B) in contact with 90 ~ 110mm is most preferable to produce.

All. curvature part

The curvature portion 120 is formed to be bent so that the two surfaces 110a and 110b described above can be connected as one, as shown in FIGS. 3 to 5 . This is because, when the two surfaces 110a and 110b are bent at a right angle, stress is concentrated and easily damaged, or there is a risk that the construction may be difficult or broken during construction.

In particular, in the curvature portion 120, as shown in [Figs. 3] to [Fig. 5], the contact protrusions 121 are respectively formed to protrude from both surfaces. At this time, the contact protrusion 121 formed on the inside is closely formed when the curved plate according to the present invention is installed on the edge of the formwork, thereby minimizing the exposure of the curved plate according to the present invention to the outside of the concrete while at the corner. It is desirable to configure so as to obtain the effect of minimizing the occurrence of cracks that have started and preventing further cracks from proceeding at the same time.

In a preferred embodiment of the present invention, the contact protrusions 121 are arranged side by side along the longitudinal direction of the curved portion 120 in three rows so that the adjacent two intervals are equal, as shown in FIGS. 3 to 5 . By integrally protruding, the contact protrusions 121 are brought into contact with the edge portion of the formwork, respectively, in the vicinity of both edges adjacent to the edge portion, thereby increasing the contact efficiency of the curved plate according to the present invention while minimizing the occurrence of cracks. It is possible to minimize the progression of cracks that have occurred.

In addition, in a preferred embodiment of the present invention, the contact protrusion 121 is made of a cylindrical shape having a diameter of 4 to 6 mm, as shown in FIGS. 3 to 5, and two adjacent contact protrusions ( 121) by forming the gap to be 4 to 6 mm, while minimizing the contact area between the contact protrusion 121 and the formwork, allows the concrete to penetrate sufficiently, thereby minimizing the exposure of the curved surface plate according to the present invention to the outside while minimizing the concrete curing effect made it possible to increase

This curvature portion 120, as shown in [Fig. 4], by making the width in a plan view to be 25 ~ 35mm, the gap between the edge portion of the formwork and the above-mentioned surfaces (110a, 110b) is too wide It is desirable to make it so that the space that can proceed even if a crack occurs at this edge can be minimized.

la. connection protrusion

Connecting protrusions 130, as shown in [Fig. 3] to [Fig. 6], a plurality of protrusions are formed on one edge folded in the body 100. At this time, these connecting protrusions 130 are integrally formed to protrude at a predetermined position, but by protruding at a position corresponding to the jaw portion 140 to be described later, when connecting the two main bodies 100 in the width direction, they are connected as one It can also be used on wide windows.

hemp. chin part

The chin portion 140, as shown in [Fig. 3] and [Fig. 4], are respectively formed on the other edge of the curved portion 120 due to the above-described curvature. At this time, the chin portion 140 is formed on the edge facing the edge where the connecting protrusion 130 is formed, and connects the two main bodies 100 manufactured according to the present invention in the width direction as shown in FIG. 6 . This is to configure it so that it can be connected to one another when the wall thickness is thick.

Accordingly, the chin portion 140, as shown in [Fig. 3] and [Fig. 4], one side protrudes upward with respect to the above-mentioned main body 100 and is formed to be chin, and two curved plates according to the present invention are formed. When the edge portion is overlapped, it is configured to be assembled by overlapping with the edge on which the above-described connection protrusion 130 is formed. In the drawing, an example in which the chin portion 140 protrudes inwardly curved of the main body 100 is shown.

In addition, in the jaw portion 140, as shown in [Fig. 3] to [Fig. 6], by penetrating each connection hole 141 at a position facing the above-described connection projection 130, such a connection projection 130 ) and the chin portion 140 can be used to connect at least two curved plates according to the present invention to adjust the width for construction.

As described above, the present invention protrudes and forms several contact protrusions so that the curved part can be in close contact with the formwork. be able to

In addition, since the present invention is formed through the inlet hole so that aggregate such as gravel can pass through, the aggregate can be caught between the curved plate and the formwork according to the present invention, thereby reducing the sinusoidal stress and minimizing the occurrence of cracks. .

100: body
110a, 110b: cotton
111: inlet hole
112: sawtooth shape
120: curvature part
121: contact projection
130: connection protrusion
140: chin part
141: connection hole

Claims (4)

It includes a body 100 integrally formed using a flexible material so that two surfaces 110a and 110b facing each other are at right angles or obtuse angles through the curved curvature portion 120,
In the main body 100, a plurality of connecting protrusions 130 are formed to protrude from one curved edge, and a connecting hole 141 is formed through the other curved edge at a position facing the connecting protrusion 130. (140) is formed to protrude inwardly curved of the main body (100),
The surface (110a, 110b), the length of the side (A) parallel to the curvature portion 120 is 125 ~ 145 mm, the length of the side (B) in contact with the curved portion 120 is 90 ~ 110 mm However, at least two inlet holes 111 each having a length of (80 to 95) mm × (55 to 65) mm of two sides are formed through the surfaces 110a and 110b, but the entire inlet hole 111 is formed through. The edge is made of a sawtooth shape (112),
The curvature portion 120 has a width W of 25 to 35 mm when viewed in a plan view, and the curved portion 120 has a contact protrusion 121 such that two adjacent to both sides are spaced at the same distance. ) is a curved plate for preventing cracks, characterized in that it is formed to protrude in three rows.
delete In claim 1,
The contact protrusion 121 is
A curved surface plate for preventing cracks, characterized in that it has a cylindrical shape with a diameter of 4 to 6 mm, and the interval between two adjacent ones is 4 to 6 mm.
In claim 1 or 3,
The main body 100,
A curved surface plate for preventing cracks, characterized in that the thickness is 1.5 to 3.5 mm.

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