KR20240007481A - A Structure of Insulator for Preventing Thermal Bridge And Precast Concrete Girder, Precast Concrete Column - Google Patents

Abstract

The present invention relates to a thermal break member for attachment to the exterior side of a precast concrete member, a precast concrete beam, and a precast concrete column using the same. More specifically, it relates to a precast concrete member such as a precast concrete beam or a precast concrete column. It is configured on the side that is in contact with the outside air, so that the insulation material is continuously installed during internal insulation, so that the insulation of the building can be constructed without interruption, and the insulation material is inserted into the UHPC case made of UHPC, preventing deformation or damage to the insulation material and increasing compressive strength at the same time. It relates to a thermal bridge blocking member for attaching to the exterior side of a precast concrete member that can block the fire continuity of the insulation material, and to a precast concrete beam and a precast concrete column using the same.
A preferred embodiment of the thermal break member for attachment to the exterior side of a precast concrete member of the present invention includes a UHPC case formed of UHPC in a box shape with an empty interior and an open side on one side; It consists of an insulating material formed inside the UHPC case.

Description

Thermal break blocking member for attaching to the exterior side of a precast concrete member, a precast concrete beam using the same, and a precast concrete column {A Structure of Insulator for Preventing Thermal Bridge And Precast Concrete Girder, Precast Concrete Column}

The present invention relates to a thermal break member for attachment to the exterior side of a precast concrete member, a precast concrete beam, and a precast concrete column using the same. More specifically, it relates to a precast concrete member such as a precast concrete beam or a precast concrete column. It is configured on the side that is in contact with the outside air, so that the insulation material is continuously installed during internal insulation, so that the insulation of the building can be constructed without interruption, and the insulation material is inserted into the UHPC case made of UHPC, preventing deformation or damage to the insulation material and increasing compressive strength at the same time. It relates to a thermal bridge blocking member for attaching to the exterior side of a precast concrete member that can block the fire continuity of the insulation material, and to a precast concrete beam and a precast concrete column using the same.

In general, a house is defined as a building that consists of a roof and walls to distinguish the inside from the outside. The walls and roof of such houses are usually made of slabs formed by pouring concrete.

The walls of houses like this are completed through many processes, including rebar assembly, formwork installation, concrete pouring, exterior finishing, insulation attachment, and interior finishing.

In this process, insulation materials are used to allow internal heat to escape to the outside or to prevent heat from entering from the outside. At this time, insulation materials are usually attached to the inside (inner wall) or outside (exterior wall) of the building to block heat.

However, in a structure where the wall and slab are connected, the insulation material is broken, and where the insulation material is broken, a lot of heat escapes to the outside along the slab or rebar, etc. This phenomenon is called a thermal bridge phenomenon. To prevent this, separate thermal bridge blocking members, etc. must be installed.

The technology behind the present invention includes Patent Registration No. 1462800, “Thermal bridge blocking device using discontinuous rebar” (Patent Document 1). In the above background technology, the insulation material 10 and the tensile module 20, which are respectively disposed at the upper and lower parts in the width direction of the insulation material 10 to resist tension in the moment direction, bear the compressive force of the slab for the vertical load of the balcony. It consists of a compression module 30, a tension module 20, and a truss-type inclined shear bar 40 that interconnects the compression module 30.

However, such thermal bridge blocking devices are installed and insulation is also installed on the sides of precast concrete beams or precast concrete columns that are in contact with the outside air to ensure continuity of insulation during internal insulation.

However, in the case of construction by attaching insulation directly to the side of a precast concrete beam or precast concrete column that is in contact with the outside air, not only was it difficult to attach the insulation, but there was a problem in that the insulation was damaged when attaching the exterior wall panel.

Patent Registration No. 1462800 “Thermal bridge blocking device using discontinuous rebar”

The present invention is intended to solve the above problems, and is constructed on the side that is in contact with the outside air of precast concrete members such as precast concrete beams or precast concrete columns, so that the insulation material is continuously installed during internal insulation, so that the insulation of the building is uninterrupted. A thermal bridge isolating member for attaching to the exterior side of a precast concrete member that prevents deformation or damage of the insulation while simultaneously increasing compressive strength and blocking fire continuity of the insulation, and precast concrete beams and precast using the same. The purpose is to provide concrete pillars.

The present invention provides a UHPC case made of UHPC in the shape of a box with an empty interior and an opening on one side; The object of the present invention is to provide a thermal barrier member for attaching to the exterior side of a precast concrete member, which is characterized in that it consists of an insulating material formed inside the UHPC case.

In addition, the insulation materials include urethane foam, bead insulation board (EPS), extruded insulation material (XPS), extruded phenolic foam board (PF), rigid urethane (PIR), vacuum insulation material (VIP), glass wool, and rock wool. (Rock wool). The object is to provide a thermal break member for attachment to the exterior side of a precast concrete member, which is characterized by being one of mineral wool.

In addition, the aim is to provide a thermal bridge blocking member for attachment to the exterior side of a precast concrete member, wherein the thickness from the opening to the inside of the UHPC case is thicker by a certain amount than the thickness of the insulation material.

In addition, the UHPC case contains 24 to 26 parts by weight of silica fume, based on 100 parts by weight of cement; 20 to 60 parts by weight of fine aggregate; 30 to 150 parts by weight of silica beads; and 3 to 4 parts by weight of a fluidizing agent, and is mixed with water so that the water-cement ratio is 28% (cement weight ratio).

In addition, the object is to provide a thermal break member for attachment to the exterior side of a precast concrete member, wherein the silica bead is spherical.

In addition, it is intended to provide a thermal break member for attachment to the exterior side of a precast concrete member, wherein the silica beads have a size of 4 to 7 ㎛.

In addition, the present invention seeks to provide a thermal bridge blocking member for attachment to the exterior side of a precast concrete member, wherein the fine aggregate is silica sand.

In addition, it is intended to provide a precast concrete beam composed of a thermal break member for attachment to the side of the outside air, wherein the thermal break member is opened and the surface where the insulation is exposed is in contact with the side in contact with the outside air.

In addition, it is intended to provide a precast concrete beam composed of a thermal barrier member for attachment to the side of the exterior air, characterized in that a thermal barrier member is configured on the side of the precast concrete beam in contact with the outside air.

In addition, it is intended to provide a precast concrete column composed of a thermal barrier member for attachment to the side of the outside air, characterized in that the thermal barrier member is opened and the surface where the insulation material is exposed is in contact with the side in contact with the exterior air.

In addition, the present invention seeks to provide a precast concrete column configured with a thermal barrier member for attachment to the side of the exterior air side, wherein the thermal barrier member is seated on the side of the precast concrete column that is in contact with the outside air.

The thermal break member for attachment to the outside air side of a precast concrete member of the present invention, and the precast concrete beam and precast concrete column using the same, are constructed on the side that is in contact with the outside air of a precast concrete member such as a precast concrete beam or a precast concrete column. During internal insulation, the insulation material is installed continuously to ensure that the insulation of the building is constructed without interruption, and the insulation material is inserted into the UHPC case made of UHPC to prevent deformation or damage to the insulation material, while simultaneously increasing the compressive strength and ensuring the fire continuity of the insulation material. There is a very useful effect that allows blocking.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention along with the detailed description of the invention. Therefore, the present invention is limited to the matters described in the attached drawings. It should not be interpreted as limited.
Figure 1 is a perspective view of a thermal break member for attachment to the exterior side of a precast concrete member of the present invention.
Figure 2 is a cross-sectional view of Figure 1.
Figure 3 is a perspective view of a precast concrete beam using a thermal break member for attachment to the exterior side of the precast concrete member of the present invention.
Figure 4 is a perspective view of a precast concrete column using a thermal break member for attachment to the exterior side of the precast concrete member of the present invention.
Figure 5 is a cross-sectional view showing an example in which the precast concrete beam of the present invention is constructed.

Below, the present invention will be described in detail with reference to embodiments shown in the attached drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

Hereinafter, the technical configuration of the present invention will be described in detail according to preferred embodiments.

Figure 1 is a perspective view of a thermal break member for attachment to the exterior side of a precast concrete member of the present invention, and Figure 2 is a cross-sectional view of Figure 1.

As shown in Figures 1 and 2, the thermal break member 10 for attachment to the exterior side of a precast concrete member of the present invention is a UHPC case 110 formed of UHPC in a box shape with an empty interior and an open side. , It consists of an insulating material 120 formed inside the UHPC case 110.

As shown, the UHPC case 110 has a hexahedral box shape with an empty interior and an open side, and can accommodate an insulating material 120 therein.

At this time, as shown in Figures 1 and 2, the thickness from the opening to the inside of the UHPC case 110 is formed to be thicker by a certain amount than the thickness of the insulation material 120, so that when the insulation material 120 is stored, the insulation material 120 ) so that the side wall surrounding it is configured to be more protruding, so that this protruding side wall is fixed to the end of the beam 2 as shown in FIG. 5 to protect the internal insulation 120, In the case of vacuum insulating material, the internal depth of the UHPC case 110 into which the insulating material 120 is inserted is preferably 5 mm, and in the case of other insulating materials, it is preferably 3 mm.

As shown in FIG. 2, the UHPC case 110 is preferably configured so that its thickness (t) is within the range of 1/100 to 1/200 of the height (H).

The insulation material 120 uses insulation materials made of semi-non-combustible materials, including urethane foam, bead insulation board (EPS), extruded insulation material (XPS), extruded phenolic foam board (PF), rigid urethane (PIR), and vacuum insulation material (VIP). , Glass wool, Rock wool. It can be used in a variety of ways, such as mineral wool.

Figure 3 is a perspective view of a precast concrete beam using a thermal break member for attachment to the outside air side side of the precast concrete member of the present invention, and Figure 4 is a precast concrete beam using a thermal break member for attachment to the outside side side of the precast concrete member of the present invention. It is a perspective view of a concrete column, and Figure 5 is a cross-sectional view showing an example in which the precast concrete beam of the present invention is constructed.

When attaching the insulation 120 directly to the surface of the precast concrete beam 2 or the precast concrete column 3 in contact with the outside air, there was a problem of the insulation 120 being damaged when installing the panel 7, etc. In addition, by making the lower insulation material 6 and the upper insulation material 5 continuous, there was a problem in that the fire continuity of the insulation material could not be blocked and the fire could not be prevented from spreading.

Therefore, in the present invention, the UHPC case 110 is formed using ultra-high strength concrete (UHPC) with excellent strength in order to strengthen structural performance, and when the insulation material 120 is formed inside, the insulation material 120 itself While preventing damage, as shown in FIG. 5, fire continuity between the upper and lower insulation materials 5 and 6 can be blocked by the box-shaped UHPC case 110.

In the present invention, the UHPC case 110 is used to prevent deformation or destruction of the insulation material 120 while improving structural performance. In particular, in order to further increase the insulation of the UHPC case 110 itself, the present invention uses a UHPC case ( 110) can be made by mixing silica beads into the UHPC composition to block radiant heat, thereby increasing insulation properties and at the same time increasing compressive strength.

For this purpose, based on 100 parts by weight of cement, it consists of 24 to 26 parts by weight of silica fume, 20 to 60 parts by weight of fine aggregate, and 30 to 150 parts by weight of silica beads, and mixed with water so that the water-cement ratio is 28% (cement weight ratio). Let it come true.

In ultra-high performance concrete compositions, cement and silica fume are used as binders. If silica fume is mixed in less than 24 parts by weight, the constructability deteriorates, and if it is mixed in more than 26 parts by weight, the amount of water required to ensure fluidity increases and the proportion of voids remaining after final curing increases, which reduces the strength of the concrete. It is preferable to mix 24 to 26 parts by weight of silica fume based on 100 parts by weight.

In the present invention, coarse aggregate is not included and only fine aggregate is included. Fine aggregate is inexpensive and hard among mineral materials, so all conventionally commonly used materials can be used.

Although such fine aggregate does not react chemically with water, it occupies a portion of the volume of concrete and the aggregate itself contributes to strengthening the concrete.

In particular, in the present invention, silica sand (sized about 0.8 to 0.2 mm) can be used as the fine aggregate.

The strength of fine aggregate decreases when mixed with less than 20 parts by weight based on 100 parts by weight of cement, and when mixed with more than 60 parts by weight, there is a high possibility of cracking, etc., so 20 to 60 parts by weight based on 100 parts by weight of cement. Mixing is desirable.

Silica beads are made up of small, round shapes of slica gel with SiO ₂ as the main ingredient.

The compressive force is increased by dispersing the silica beads to increase the packing density. However, when mixing less than 30 parts by weight per 100 parts by weight of cement, it is difficult to lower the thermal conductivity, and when mixing exceeding 150 parts by weight, the strength is lowered. Therefore, it is preferable to mix 30 to 150 parts by weight of silica beads with 100 parts by weight of cement.

In particular, in the present invention, since both heat insulation and increased compressive strength must be satisfied, the structural shape and size of the added silica beads are very important.

Therefore, in the present invention, the silica beads can be formed into a spherical shape that can uniformly distribute the compressive force, and the compressive force can be increased by dispersing with the added silica sand to increase the packing density.

Such spherical silica beads may have a diameter of 1 to 10 ㎛, preferably 4 to 7 ㎛. If it is less than 4㎛ or more than 7㎛, the packing density decreases and the compressive strength decreases, so it is preferable that the spherical silica beads are formed in a size of 4~7㎛.

<Experimental Example 1>

As in Table 1, in the comparative examples, silicon beads were not mixed, in all examples, silica beads were mixed in the range of 30 to 150 parts by weight based on 100 parts by weight of cement, and in both comparative examples and examples, 100 parts by weight of cement was mixed. 3.4 parts by weight of fluidizing agent were additionally mixed, and the weight ratio of water to cement was fixed at 28% in both comparative examples and examples, and compressive strength and thermal conductivity tests were performed on the compositions of comparative examples and examples.

Unit: weight% division W/C C science fiction SS SP SB AG Comparative example 28.0 37.0 9.3 40.7 13.0 - - Example 1 28.0 46.5 11.6 11.6 - 30.2 - Example 2 28.0 45.7 11.4 25.1 - 16.0 1.8 Example 3 28.0 45.7 11.4 25.1 - 29.7 1.8 Example 4 28.0 37.0 9.3 - - 53.7 -

To the mixing ratio in Table 1, in both comparative examples and examples, 3.4 parts by weight of fluidizing agent was additionally mixed based on 100 parts by weight of cement.

Here, W/C: water cement ratio

C: cement, SF: silca fume, SS: silica sand

SP: silca powder, SB: silica bead, AG: aerogel

* The above figures represent the addition ratio of each mixed material to the total mixed material.

* Steel fibers can be additionally mixed at about 1 part by weight based on the weight of cement, and in this case, the fiber length is about 10 to 14 mm.

In both comparative examples and examples, 3.4 parts by weight of fluidizing agent was additionally mixed based on 100 parts by weight of cement. The fluidizing agent can be additionally mixed in an amount of 3 to 4 parts by weight based on 100 parts by weight of cement.

The fluidizing agent is added to improve mixing properties, and various known fluidizing agents can be used. Since the fluidity enhancing effect is weak at less than 3 parts by weight, a large amount of mixing water is used, causing a decrease in compressive strength, 4 When used in excess of parts by weight, not only does it not have a significant effect in improving fluidity, but it also causes material separation, etc., so it is desirable to additionally mix 3 to 4 parts by weight based on 100 parts by weight of cement.

As in Table 1, in the comparative examples, silicon beads were not mixed, and in all examples, silica beads were mixed in the range of 30 to 150 parts by weight based on 100 parts by weight of cement. In both comparative examples and examples, the water to cement was mixed. The weight ratio was fixed at 28%.

As shown in Table 1, the compressive strength and thermal conductivity of the compositions of Comparative Examples and Examples were measured, and the results are shown in Table 2.

division Compressive strength (MPa) Thermal conductivity (W/m.K) Comparative example 186.0 1.39 Example 1 187.29 0.89 Example 2 107.39 0.79 Example 3 110.59 0.64 Example 4 208.96 0.77

As shown in Table 2, in the comparative example in which silica beads were not mixed, the compressive strength was measured at 186.0 MPa and the thermal conductivity was measured at 1.39, and it can be seen that all examples in which silica beads were mixed showed lower thermal conductivity than the comparative example. In addition, In Examples 2 and 3, the compressive strength was slightly lower than that of the comparative example, but unlike Example 2 and Example 3, Example 1, in which the mixing ratio of silica sand was reduced, showed almost the same compressive strength as the comparative example. The compressive strength in Example 4, in which the mixing ratio of silica beads was increased except for silica sand, was 208.96 MPa, showing a significantly higher compressive strength than the comparative example.

Therefore, it can be seen that by mixing silica beads to block radiant heat, the thermal insulation is increased and the compressive strength is increased at the same time, so that the thermal insulation performance and structural performance, including the thermal insulation material, can be satisfied at the same time.

As shown in FIG. 5, the thermal insulation member (10) of the present invention has the upper and lower insulation materials (5) and (6) in the wall and parapet areas where insulation is discontinuous, such as at the joint of the floor slab, by the thermal insulation material (1). While being continuous, an insulation material 120 is formed inside the UHPC case 110 on the side of the precast concrete beam 2 to ensure that the insulation of the building is constructed without interruption, thereby performing two roles as a structure and an insulation material.

The thermal break member 10 for attachment to the outside air side of the precast concrete member as described above is constructed on the side of the precast concrete beam 2 or the precast concrete column 3 that is in contact with the outside air. At this time, external shock is In order to prevent direct transmission to the insulation material 120, the open side of the UHPC case 110, that is, the surface where the insulation material 120 is exposed, is directly exposed to the outside air from the precast concrete beam (2) or the precast concrete column (3). It is configured to be in contact with the side that touches.

At this time, in order to facilitate the installation of the thermal barrier member (10) on the side of the precast concrete beam (2) or precast concrete column (3) that is in contact with the outside air, and to reduce the external shock of the thermal barrier member (10), A thermal break member (10) may be formed on the side of the precast concrete beam (2) or precast concrete column (3) that is in contact with the outside air.

In particular, the thermal bridge blocking member 10 of the present invention may be installed as one member on the side of the precast concrete beam 2 or precast concrete column 3 that is in contact with the outside air, or a plurality of members may be installed.

The thermal break blocking member for attachment to the outside air side of the precast concrete member of the present invention as described above, and the precast concrete beam and precast concrete column using the same, are the side that is in contact with the outside air of the precast concrete member such as a precast concrete beam or a precast concrete column. It is configured to ensure that the insulation material is continuously constructed during internal insulation, so that the insulation of the building is constructed without interruption, and by inserting the insulation material into the UHPC case made of UHPC, it prevents deformation or damage of the insulation material and at the same time increases the compressive strength of the insulation material. It has a very useful effect in allowing fire continuity to be interrupted.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various changes and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such variations and modifications, but is limited by the claims appended below.

10: Thermal blocking member for attachment to the exterior side of a precast concrete member
110: UHPC case
120: insulation material
2: Precast concrete beam
21: Seating groove
3: Precast concrete column
31: Seating groove

Claims (11)

A UHPC case 110 made of UHPC in the shape of a box with an empty interior and an open side on one side;
A thermal bridge blocking member for attachment to the exterior side of a precast concrete member, characterized in that it consists of an insulation material (120) formed inside the UHPC case (110). In claim 1,
The insulation material 120 is urethane foam, bead insulation board (EPS), extruded insulation material (XPS), extruded phenolic foam board (PF), rigid urethane (PIR), vacuum insulation material (VIP), glass wool, Rock wool. A thermal break member for attachment to the exterior side of a precast concrete member, characterized in that it is one of mineral wool. In claim 1,
A thermal break member for attachment to the exterior side of a precast concrete member, characterized in that the thickness from the opening to the inside of the UHPC case 110 is thicker by a certain amount than the thickness of the insulation material 120. In claim 1,
The UHPC case (110) is,
Based on 100 parts by weight of cement,
24 to 26 parts by weight of silica fume;
20 to 60 parts by weight of fine aggregate;
30 to 150 parts by weight of silica beads; and
A thermal bridge blocking member for attachment to the exterior side of a precast concrete member, which is composed of 3 to 4 parts by weight of a fluidizing agent and mixed with water so that the water-cement ratio is 28% (cement weight ratio). In claim 4,
A thermal break member for attachment to the exterior side of a precast concrete member, wherein the silica bead is spherical. In claim 5,
The silica bead is a thermal bridge blocking member for attachment to the exterior side of a precast concrete member, characterized in that the size is 4 to 7㎛. In claim 4,
A thermal break member for attachment to the exterior side of a precast concrete member, characterized in that the fine aggregate is silica sand. The outside air side, characterized in that the thermal break member (10) for attachment to the outside air side side of the precast concrete member of any one of claims 1 to 7 is opened and the surface where the insulation material (120) is exposed is in contact with the side that is in contact with the outside air. A precast concrete beam composed of thermal break members for side attachment. In claim 8,
A precast concrete beam composed of a thermal barrier member for attachment to the side of the exterior air side, characterized in that a thermal barrier member (10) is formed on the side of the precast concrete beam (2) in contact with the outside air. The outside air side, characterized in that the thermal break member (10) for attachment to the outside air side side of the precast concrete member of any one of claims 1 to 7 is opened and the surface where the insulation material (120) is exposed is in contact with the side that is in contact with the outside air. A precast concrete column composed of thermal break members for side attachment. In claim 10,
A precast concrete column composed of a thermal barrier member for attachment to the side of the exterior air side, characterized in that a thermal barrier member (10) is formed on the side of the precast concrete column (3) in contact with the outside air.

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