Horizontal slit material, slit structure, method for forming a slit structure, and method for forming a horizontal slit material

Abstract

The objective is to provide a horizontal slit material, a slit structure, a method for forming a slit structure, and a method for forming a horizontal slit material that can reliably seal horizontal slits and are easy to manufacture and install. [Solution] A base material 110, which is continuously and integrally formed from a foam that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness on the bottom surface, is installed on the bottom surface of a horizontal slit provided horizontally between a floor slab 30, which is an existing concrete structure, and a wall 20, which is a newly constructed concrete structure.

Description

Technical Field

[0001] The present invention relates to a horizontal slit material, a slit structure, a method for forming a slit structure, and a method for forming a horizontal slit material. In particular, it relates to a horizontal slit material, a slit structure, a method for forming a slit structure, and a method for forming a horizontal slit material that are arranged in a horizontal slit, which is a slit formed in the horizontal direction, with respect to a concrete structure constructed in the vertical direction.

Background Art

[0002] Conventionally, in order to prevent a concrete building wall from collapsing due to the stress on the wall being applied to the column and the column buckling, a construction method of forming slits along the boundary positions between the wall and the column and between the wall and the floor is known.

[0003] FIG. 13 is an elevation view showing an example of a wall with seismic reinforcement. As shown in FIG. 13, a wall 20 formed between two columns 10 has a horizontal slit 40 formed in the horizontal direction between the wall 20 and the floor slab 30, so that the restraint between the wall 20 and the floor slab 30 is interrupted, and a horizontal slit material 50 is interposed in the horizontal slit 40.

[0004] Also, the wall 20 has vertical slits 60 formed in the vertical direction between the wall 20 and each column 10, so that the restraint between the wall 20 and the column 10 is interrupted, and a vertical slit material 70 is interposed in the vertical slit 60.

[0005] By providing the horizontal slit 40 and the vertical slit 60 along the boundary positions between the wall 20 and the floor slab 30 and between the wall 20 and the column 10 in this way, the wall 20 and the floor slab 30, and the wall 20 and the column 10 have a discontinuous structure, and the stress applied to the wall during an earthquake does not transfer to the column. Thereby, buckling of the column during an earthquake can be prevented.

[0006] The horizontal slit material 50 and vertical slit material 70, which are interposed in the horizontal slit 40 and vertical slit 60 around the wall, are made of a material that has compressive resilience, fire resistance, water resistance, and other properties.

[0007] Figure 14 is a cross-sectional view in the wall thickness direction showing a horizontal slit material made of foam and non-combustible material installed horizontally on the surface of the floor slab. As shown in Figure 14, for example, the horizontal slit material 50 is arranged horizontally to the surface of the floor slab 30 and consists of a foam 51 made of polyethylene resin or the like, and a non-combustible material 52 made of rock wool or the like.

[0008] In this manner, the horizontal slit material 50 that seals the horizontal slit 40 is configured such that the foam 51 is responsible for water resistance, strength, and elasticity, and the non-combustible material 52 is responsible for fire resistance. A joint member M can also be provided as needed.

[0009] The horizontal slit material 50 is fixed by being inserted into vertical bracing bars installed in the floor slab 30. The wall formwork and vertical slit material 70 are assembled on top of the horizontal slit material 50 which is fixed horizontally to the surface of the floor slab 30, and then the wall is formed by pouring concrete for the wall 20. If a joint member M is provided, the joint member M is removed after the formwork is dismantled, and the formed joint is filled with sealant to prevent water leakage.

[0010] However, because the non-combustible material 52, made of rock wool or the like, is much softer than the foam 51, made of polyethylene resin or the like, there is a risk that when concrete is poured for the wall 20, the pressure of the concrete may deform the non-combustible material 52, causing the foam 51 and the non-combustible material 52 to separate.

[0011] If the foam 51 and the non-combustible material 52 separate, a gap will be created between them. Therefore, to prevent the foam 51 and the non-combustible material 52 from separating, it is conceivable to bond them together with an adhesive or the like. However, the non-combustible material 52 is softer than the foam 51, resulting in poor adhesion.

[0012] Therefore, it is conceivable to seal the horizontal slits 40 with a continuous, non-combustible material that can withstand the pressure during concrete placement. Specifically, by making the main raw material of the horizontal slit material 50 an inorganic calcium carbonate, the horizontal slit material 50 will not only carbonize but also not burn even if a fire occurs, and its high hardness will allow it to withstand the pressure during concrete placement. However, a horizontal slit material made primarily from inorganic calcium carbonate has high hardness and therefore cannot accommodate the unevenness that occurs on the surface of the floor slab 30.

[0013] Therefore, a horizontal slit material has been developed that can accommodate unevenness in the floor slab 30, is easy to manufacture and install, and can seal the horizontal slit 40 with a continuous non-combustible material (see, for example, Patent Document 1).

[0014] Figure 15 is a cross-sectional view in the wall thickness direction showing the horizontal slit material disclosed in Patent Document 1 installed on a floor slab. As shown in Figure 15, for example, the horizontal slit material 80 is a laminate consisting of a first layer 81 and a second layer 82 arranged horizontally to the surface of the floor slab 30, the first layer 81 being made of calcium carbonate foam or the like which has excellent fire resistance, and the second layer 82 being made of polyethylene or the like which has water resistance and elasticity. Joint members M can also be provided as needed.

[0015] As a result, the horizontal slit material 80 can be easily manufactured because it has a laminated structure in which a first layer 81 and a second layer 82 are superimposed. Furthermore, the first layer 81 is made of a material with high fire resistance, which prevents the intrusion and leakage of flames, and the second layer 82 is made of a material with high water resistance, which prevents the intrusion of water from the outside. Furthermore, since the second layer 82 is made of a highly elastic material, it can seal the horizontal slit 40 in response to unevenness on the surface of the floor slab 30. [Prior art documents] [Patent Documents]

[0016] [Patent Document 1] Japanese Patent Publication No. 2013-68009 [Overview of the project] [Problems that the invention aims to solve]

[0017] However, the horizontal slit material 80 disclosed in Patent Document 1 had room for improvement in terms of waterproofing and fire resistance. Furthermore, in order to reliably seal the horizontal slit 40 with the horizontal slit material 80 disclosed in Patent Document 1, a very time-consuming manufacturing process was required, resulting in high labor costs.

[0018] Specifically, the horizontal slit material 80 disclosed in Patent Document 1 is a laminate consisting of a first layer 81 and a second layer 82 arranged horizontally to the surface of the floor slab 30. Therefore, it is necessary to ensure that the first layer 81 and the second layer 82 are securely bonded together.

[0019] However, it is extremely difficult to reliably bond the first layer 81 and the second layer 82. For example, if air or dust gets between the first layer 81 and the second layer 82 during bonding, the adhesive strength will decrease.

[0020] If the adhesive strength between the first layer 81 and the second layer 82 decreases, there is a risk that the first layer 81 and the second layer 82 may separate during concrete placement. Also, if air or dust gets trapped between the first layer 81 and the second layer 82, that dust or air itself could create a gap.

[0021] Therefore, it is necessary to firmly bond the first layer body 81 and the second layer body 82 without any gaps. For example, it is necessary to carefully and accurately bond them so that foreign substances such as air and dust do not enter between the first layer body 81 and the second layer body 82.

[0022] Specifically, the workplace for manufacturing the horizontal slit material 80 is sealed, and an air purifier and a dust collector are installed in the workplace to remove foreign substances in the air. Workers wear clean wear and clean caps to suppress the dust sources such as hair and skin flakes, and before working, they remove the dust attached to their bodies such as with an air duster and then carry out the work.

[0023] Then, after completely removing the dust attached to the bonding surfaces of the first layer body 81 and the second layer body 82, the first layer body 81 and the second layer body 82 are bonded together. At this time, careful work is required so that air does not enter. Therefore, it is very time-consuming to manufacture the horizontal slit material 80 that can surely seal the horizontal slit 40.

[0024] Alternatively, it is conceivable to surely close the gap generated during the bonding of the first layer body 81 and the second layer body 82 with a sealing material or the like, but it is difficult to completely close the gap generated inside the bonding surfaces of the first layer body 81 and the second layer body 82.

[0025] The present invention has been made in view of such points, and an object thereof is to provide a horizontal slit material, a slit structure, a method for forming a slit structure, and a method for forming a horizontal slit material that can surely seal a horizontal slit and are easy to manufacture and install.

Means for Solving the Problems

[0026] In order to solve the above problems, the present invention provides a horizontal slit material that is placed in a horizontal slit, which is a slit formed horizontally in a concrete structure constructed in the vertical direction, and is characterized by having a base material portion that is installed on the bottom surface of the horizontal slit and is continuously and integrally formed from a foam that has elasticity and fire resistance that can follow the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness of the bottom surface.

[0027] As a result, a base material, which is continuously and integrally formed from a foam that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness on the bottom surface, is installed on the bottom surface of the horizontal slit.

[0028] Furthermore, the present invention provides a slit structure in which a horizontal slit material is installed in a horizontal slit, which is a slit formed horizontally in a concrete structure constructed in a vertical direction, and is characterized in that a base material portion, which is continuously and integrally formed from a foam that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness on the bottom surface of the horizontal slit, is installed on the bottom surface.

[0029] As a result, a base material is continuously and integrally formed from a foam that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness on the bottom surface of the horizontal slit, and is installed on the bottom surface of the horizontal slit.

[0030] Furthermore, the present invention provides a method for forming a slit structure in which a horizontal slit material is installed in a horizontal slit, which is a slit formed horizontally in a concrete structure constructed in a vertical direction, and the method is characterized by comprising the step of installing a base material portion, which is continuously and integrally formed from a foam material having elasticity and fire resistance that can follow the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness on the bottom surface of the horizontal slit, on the bottom surface.

[0031] As a result, a base material is continuously and integrally formed from a foam that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness on the bottom surface of the horizontal slit, and is installed on the bottom surface of the horizontal slit.

[0032] Furthermore, the present invention provides a method for forming a horizontal slit material, which is a slit formed horizontally in a concrete structure constructed in a vertical direction, characterized in that the method includes a step of continuously and integrally forming a base material portion installed on the bottom surface of the horizontal slit using a foam material that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and absorbing unevenness on the bottom surface.

[0033] As a result, the base material installed on the bottom surface of the horizontal slit is continuously and integrally formed from a foam material that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and absorbing unevenness on the bottom surface. [Effects of the Invention]

[0034] According to the present invention, the horizontal slit material, slit structure, method for forming the slit structure, and method for forming the horizontal slit material, a base material portion is continuously and integrally formed from a foam that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness on the bottom surface, and is installed on the bottom surface of the horizontal slit. This ensures that the horizontal slit is reliably sealed and simplifies manufacturing and installation work.

[0035] Specifically, in the horizontal slit material, slit structure, method for forming a slit structure, and method for forming a horizontal slit material of the present invention, the base material of the horizontal slit material is continuously and integrally formed from a foam that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness of the bottom surface, thus eliminating the need to bond different components together.

[0036] This simplifies manufacturing and eliminates the inclusion of dust and air during bonding. Furthermore, since the horizontal slit material is made of a single material to fill the horizontal slit, no gaps are created within the horizontal slit material. Because the horizontal slit material is made of a single material, installation is easy. And the horizontal slit can be reliably sealed. [Brief explanation of the drawing]

[0037] [Figure 1] This is a cross-sectional view in the wall thickness direction showing the horizontal slit material according to the first embodiment installed on a floor slab. [Figure 2] This is a cross-sectional view in the wall thickness direction showing a slit structure in which a horizontal slit material according to the first embodiment is installed, and a method for forming the same. [Figure 3] This is a perspective view showing a vertical slit material installed on top of a horizontal slit material according to the first embodiment. [Figure 4] This is a perspective view showing a corner section where a horizontal slit material is installed, and in particular, a perspective view showing a corner section where a horizontal slit material is provided at an external corner. [Figure 5] This is a perspective view showing a corner section where a horizontal slit material is installed, and in particular, a perspective view showing a corner section where a horizontal slit material is installed in an inner corner. [Figure 6] This is a cross-sectional view in the wall thickness direction showing the horizontal slit material according to the second embodiment installed on a floor slab with a step. [Figure 7] This is a cross-sectional view in the wall thickness direction showing a slit structure in which a horizontal slit material according to the second embodiment is installed, and a method for forming the same. [Figure 8] This is a perspective view showing a vertical slit material installed on top of a horizontal slit material according to the second embodiment. [Figure 9] This is a perspective view showing a corner section where a horizontal slit material is installed, and in particular, a perspective view showing a corner section where a horizontal slit material is provided at an external corner. [Figure 10]This is a perspective view showing a corner section where a horizontal slit material is installed, and in particular, a perspective view showing a corner section where a horizontal slit material is installed in an inner corner. [Figure 11] This is a cross-sectional view in the wall thickness direction showing the horizontal slit material according to the third embodiment installed on a floor slab with a step. [Figure 12] This is a cross-sectional view in the wall thickness direction showing the horizontal slit material according to the fourth embodiment installed on a floor slab with a step. [Figure 13] This is an elevation drawing showing an example of a wall that has undergone seismic reinforcement. [Figure 14] This is a cross-sectional view in the wall thickness direction showing a horizontal slit material made of foam and non-combustible material installed horizontally on the surface of the floor slab. [Figure 15] This is a cross-sectional view in the wall thickness direction showing the horizontal slit material disclosed in Patent Document 1 installed on a floor slab. [Modes for carrying out the invention]

[0038] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [First Embodiment] Figure 1 is a cross-sectional view in the wall thickness direction showing the horizontal slit material according to the first embodiment installed on a floor slab.

[0039] As shown in Figure 1, the horizontal slit material 100 is a plate-like body whose dimensions in the short direction are equal to the thickness of the wall 20 that is formed later, and whose dimensions in the long direction are equal to the distance between the two columns 10 (not shown here) that are formed later.

[0040] Furthermore, as will be described later, if a joint is provided in the horizontal slit 40, the dimension in the shorter direction of the horizontal slit material 100 can be made shorter than the thickness of the wall 20, and the horizontal slit material 100 can be made into any shape as appropriate so that multiple horizontal slit materials 100 can be arranged by dividing the dimension between the two columns 10.

[0041] The horizontal slit material 100 consists of a continuously formed base material 110. The base material 110 is not particularly limited as long as it is a foam with elasticity and fire resistance that can follow the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness on the surface of the floor slab 30 which is the bottom surface. However, a non-water-absorbent or low-water-absorbent phenolic foam with excellent elasticity and fire resistance that can follow the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness on the surface of the floor slab 30 is preferred.

[0042] Furthermore, if elasticity and fire resistance are required to adequately follow the load during concrete placement and deformation during drying shrinkage, and to adequately absorb unevenness on the surface of the floor slab 30, the density of the base material 110 is preferably 20 kg / m³ to 50 kg / m³, and even better, the density of the base material 110 is 29 kg / m³.

[0043] To give a more specific example of materials, the base material 110 should be a phenolic foam insulation material of type 1, no. 2, CII, as specified by JIS (Japanese Industrial Standards).

[0044] The base material 110 is formed from phenolic foam insulation with a density of 29 kg / m3, which allows it to adequately follow the load during concrete placement and deformation during drying shrinkage, and also to adequately absorb unevenness on the surface of the floor slab 30.

[0045] Therefore, unlike the horizontal slit material 80 disclosed in Patent Document 1, there is no need to have a laminated structure in which a first layer 81 and a second layer 82 are stacked on top of each other. As a result, there is no manufacturing process to bond the first layer 81 and the second layer 82 together, which can reduce manufacturing costs.

[0046] Furthermore, since it is not a laminated structure in which the first layer 81 and the second layer 82 are superimposed, no gaps occur between the layers. Therefore, the horizontal slit 40 can be reliably sealed, making it suitable in terms of waterproofing and fire protection.

[0047] Figure 2 is a cross-sectional view in the wall thickness direction showing a slit structure in which a horizontal slit material according to the first embodiment is installed, and a method for forming the same. As shown in Figure 2(A), the floor slab 30 is constructed first. The construction of the floor slab 30 involves assembling the required reinforcing bars, setting up the formwork, pouring concrete for the floor slab 30, and then the poured surface is smoothed by workers using trowels and other tools. However, it is impossible to make the floor slab 30 perfectly smooth, and unevenness will occur on the surface of the floor slab 30.

[0048] Next, as shown in Figure 2(B), after the concrete of the floor slab 30 has hardened sufficiently, the horizontal slit material 100 is installed on top of the floor slab 30. At this time, joint members M can be installed as needed.

[0049] The horizontal slit material 100 can be fixed by being inserted into vertical bracing bars (not shown) installed in the floor slab 30, but it is also possible to simply place the horizontal slit material 100 on the surface of the floor slab 30, or to fix it using adhesive or concrete nails.

[0050] At this time, the horizontal slit material 100 has elasticity that can sufficiently absorb the unevenness that occurs on the surface of the floor slab 30, so that the unevenness that occurs on the surface of the floor slab 30 is absorbed by the horizontal slit material 100, causing the floor slab 30 and the horizontal slit material 100 to be in close contact, and no gap is created between the floor slab 30 and the horizontal slit material 100.

[0051] Next, as shown in Figure 2(C), after installing the horizontal slit material 100 on the surface of the floor slab 30, the columns 10 and walls 20 or the ceiling (floor slab 30 on the upper floor) are constructed. For the construction of the columns 10 and walls 20, the predetermined reinforcing bars for constructing the columns 10 and walls 20 are assembled, formwork is installed, and concrete is poured for constructing the columns 10 and walls 20.

[0052] In this case, the horizontal slit material 100 of the present invention is installed in a horizontal slit 40 between a floor slab 30, which is an existing concrete structure where concrete has already been poured, and a wall 20, which is a newly constructed concrete structure where concrete is poured after the horizontal slit material 100 is installed. The horizontal slit material 100 is elastic enough to follow the load during concrete pouring and deformation during drying shrinkage, and to absorb unevenness on the surface of the floor slab 30.

[0053] Therefore, even after the construction of the new concrete structure, no gap will form between the horizontal slit 40 and the horizontal slit material 100. Furthermore, since the horizontal slit material 100 is fire-resistant, it can prevent the spread of fire in the event of a fire.

[0054] Figure 3 is a perspective view showing a vertical slit material installed on top of a horizontal slit material according to the first embodiment. The vertical slit material 70 comprises, for example, a support material 71 made of rigid polyvinyl chloride or the like, which has an H shape in cross-section, and a base material 72 made of calcium carbonate foam.

[0055] The base material 72 is held in place by support members 71 positioned at both ends of the base material 72. In addition, joint material attached to a formwork (not shown here) can be held in the space on the side where the support members 71 do not grip the base material 72, as needed.

[0056] Figure 4 is a perspective view showing a corner section where a horizontal slit material is installed, and is a perspective view showing a corner section in which a horizontal slit material is provided at an external corner. As shown in Figure 4, the entire structure can be easily installed in corners such as outside corners by installing specially shaped horizontal slit material 100S, which is obtained by cutting the horizontal slit material 100 to the required shape. In this way, by installing the horizontal slit material 100 or horizontal slit material 100S, the effort required to install the horizontal slit material 100 is easy, even in outside corners.

[0057] In this case, since the horizontal slit material 100 is made of a single foam material formed as a continuous, integral piece, discontinuities at the joints between materials that occur in conventional slit materials formed from multiple materials do not occur at the outside corner. Therefore, a continuous structure with fire resistance and water resistance can be ensured even at the outside corner.

[0058] In this embodiment, the horizontal slit material 100 was described as being placed between a floor slab 30, which is an already constructed concrete structure, and a column 10 or wall 20, which is a newly constructed concrete structure. However, it is also possible to form a horizontal slit 40 by cutting between the existing floor slab 30 and the column 10 or wall 20, and then place the horizontal slit material 100 in the formed horizontal slit 40. The same applies to the following embodiments.

[0059] Figure 5 is a perspective view showing a corner section where a horizontal slit material is installed, and is a perspective view showing a corner section in which a horizontal slit material is installed in an inner corner. As shown in Figure 5, in corners such as inner corners, the entire structure can be easily installed by installing specially shaped horizontal slit material 100S, which is obtained by cutting the horizontal slit material 100 to the required shape. In this way, by installing the horizontal slit material 100, the effort required to install the horizontal slit material 100 is easy, even in inner corners.

[0060] In this case, since the horizontal slit material 100 is made of a single foam material formed as a continuous, integral piece, discontinuities at the joints between materials that occur in conventional slit materials formed from multiple materials do not occur at the outer corner. Therefore, even at the inner corner, a continuous structure with fire resistance and water resistance can be ensured.

[0061] [Second Embodiment] Next, a second embodiment of the present invention will be described. The horizontal slit material of this embodiment is substantially the same as that shown in the first embodiment, except that the horizontal slit material is equipped with a stepped member. For this reason, the same reference numerals are used for components that are substantially the same as those in the first embodiment, and their descriptions will be omitted as appropriate.

[0062] Figure 6 is a cross-sectional view in the wall thickness direction showing the horizontal slit material according to the second embodiment installed on a floor slab with a step. As shown in Figure 6, the horizontal slit material 200 according to the second embodiment is installed to fill the gap in a horizontal slit 40, which is a horizontally arranged gap between an existing concrete structure attached below, such as a floor slab 30, and a newly constructed concrete structure that is later constructed above, such as a wall 20, and has a stepped portion S to prevent water from entering from the outside.

[0063] The horizontal slit 40 in the second embodiment is the bottom surface of the horizontal slit 40 and has a step in the floor slab 30. Specifically, the upper surface of the floor slab 30, which is a pre-constructed concrete structure, has two levels: an upper surface 31 which is higher on the indoor side than on the outdoor side to prevent water from entering when the water level rises, and a lower surface 32 which is lower on the outdoor side than the upper surface 31. For convenience, the vertical surface at the boundary between the upper surface 31 and the lower surface 32 will be referred to as the boundary surface 33 and will be explained below.

[0064] The horizontal slit material 200 according to the second embodiment comprises a base material portion 210, a part of which is installed on at least the upper surface 31, and a stepped fitting portion 220, which is installed to fit into the stepped portion S.

[0065] Specifically, the stepped fitting portion 220 is formed such that its bottom surface contacts the lower surface 32, and its back surface, which is on the indoor side, contacts the boundary surface 33. The base material portion 210, which is placed on the upper surface 31, and the stepped fitting portion 220 are formed as a continuous, integral unit.

[0066] In this embodiment, the interface 33 is depicted vertically, but it may also be a slope. As long as the bottom surface of the stepped fitting portion 220 contacts the lower step surface 32 and the back surface of the stepped fitting portion 220 contacts the interface 33, the shape of the horizontal slit material 200 can be formed arbitrarily. The material of the horizontal slit material 200 is the same as that of the horizontal slit material 100 in the first embodiment.

[0067] In this embodiment, the uppermost surface of the stepped fitting portion 220 is formed at the same height as the upper surface of the base material portion 210, but a height difference may be provided between the uppermost surface of the stepped fitting portion 220 and the upper surface of the base material portion 210.

[0068] At this time, the uppermost surface of the stepped fitting portion 220 is formed at a higher position than the upper step surface 31, Even if the water level rises above the upper surface 31, the stepped fitting portion 220 can act as a breakwater because its uppermost surface is higher than the upper surface 31. This prevents water from entering the interior of the building.

[0069] Even if a stepped portion S is provided in the horizontal slit 40, as in the second embodiment, by installing the horizontal slit material 200, it is possible to adequately follow the load during concrete placement and deformation during drying shrinkage, and to adequately absorb unevenness that occurs on the surface of the floor slab 30, especially on the upper surface 31, the lower surface 32, and the boundary surface 33.

[0070] Therefore, unlike the horizontal slit material 80 disclosed in Patent Document 1, there is no need to have a laminated structure in which a first layer 81 and a second layer 82 are stacked on top of each other. As a result, there is no manufacturing process to bond the first layer 81 and the second layer 82 together, which can reduce manufacturing costs.

[0071] Furthermore, since it is not a laminated structure in which the first layer 81 and the second layer 82 are superimposed, no gaps occur between the layers. Therefore, the horizontal slit 40 can be reliably sealed, making it suitable in terms of waterproofing and fire protection.

[0072] Figure 7 is a cross-sectional view in the wall thickness direction showing a slit structure in which a horizontal slit material according to the second embodiment is installed, and a method for forming the same. As shown in Figure 7(A), first a floor slab 30 having a stepped section S is constructed.

[0073] Next, as shown in Figure 7(B), after the concrete of the floor slab 30 has hardened sufficiently, the horizontal slit material 200 is installed on the floor slab 30 having the stepped portion S. At this time, joint members M can be installed as needed.

[0074] The horizontal slit material 200 is installed on the floor slab 30 having a stepped portion S such that the bottom surface of the stepped fitting portion 220 is in contact with the lower step surface 32 and the back surface of the stepped fitting portion 220 is in contact with the boundary surface 33.

[0075] At this time, the horizontal slit material 200 has elasticity that can sufficiently absorb unevenness on the surface of the floor slab 30. As a result, unevenness on the surface of the floor slab 30 having a stepped portion S, especially unevenness on the upper surface 31, the lower surface 32, and the boundary surface 33, is absorbed by the horizontal slit material 200, causing the floor slab 30 and the horizontal slit material 200 to be in close contact, and no gap is created between the floor slab 30 and the horizontal slit material 200.

[0076] Next, as shown in Figure 7(C), after installing horizontal slit material 200 on the surface of the floor slab 30 having a stepped section S, the columns 10 and walls 20 or ceiling are constructed. For the construction of the columns 10 and walls 20, the predetermined reinforcing bars for constructing the columns 10 and walls 20 are assembled, formwork is installed, and concrete for constructing the columns 10 and walls 20 is poured.

[0077] In this case, the horizontal slit material 200 of the present invention is installed in the horizontal slit 40 between the floor slab 30, which is an existing concrete structure, and the wall 20, which is a newly constructed concrete structure. The horizontal slit material 200 follows the load during concrete placement and deformation during drying shrinkage, and has elasticity that can absorb unevenness on the surface of the floor slab 30 which has a stepped portion S.

[0078] Therefore, even after the construction of the new concrete structure, no gap will form between the horizontal slit 40 and the horizontal slit material 200. In addition, since the horizontal slit material 200 is fire-resistant, it can prevent the spread of fire in the event of a fire.

[0079] Figure 8 is a perspective view showing a vertical slit material installed on top of a horizontal slit material according to the second embodiment. The vertical slit material 70 comprises, for example, a support material 71 made of rigid polyvinyl chloride or the like, which has an H shape in cross-section, and a base material 72 made of calcium carbonate foam.

[0080] The base material 72 is held in place by support members 71 positioned at both ends of the base material 72. In addition, joint material attached to a formwork (not shown here) can be held in the space on the side where the support members 71 do not grip the base material 72, as needed.

[0081] Figure 9 is a perspective view showing a corner section where a horizontal slit material is installed, and is a perspective view showing a corner section in which a horizontal slit material is provided at an external corner. As shown in Figure 9, by installing a specially shaped horizontal slit material 200S, which is a horizontal slit material 200 cut to the required shape, at the corner of an external corner, the entire structure can be easily installed. In this way, by installing the horizontal slit material 200 or horizontal slit material 200S, the effort required to install the horizontal slit material 200 is negligible, even at the corner of an external corner.

[0082] In this case, since the horizontal slit material 200 is made of a single foam material formed as a continuous, integral piece, discontinuities at the joints between materials that occur in conventional slit materials formed from multiple materials do not occur at the outside corner. Therefore, even at the outside corner, a continuous structure with fire resistance and water resistance can be ensured.

[0083] Figure 10 is a perspective view showing a corner section where a horizontal slit material is installed, and is a perspective view showing a corner section in which a horizontal slit material is installed in an inner corner. As shown in Figure 10, by installing a specially shaped horizontal slit material 200S, which is a horizontal slit material 200 cut to the required shape, at the inner corner, the entire structure can be easily installed. In this way, by installing the horizontal slit material 200 or horizontal slit material 200S, the effort required to install the horizontal slit material 200 is negligible, even at the inner corner.

[0084] In this case, since the horizontal slit material 200 is made of a single foam material formed as a continuous, integral piece, discontinuities at the joints between materials that occur in conventional slit materials formed from multiple materials do not occur at the outer corner. Therefore, even at the inner corner, a continuous structure with fire resistance and water resistance can be ensured.

[0085] [Third Embodiment] Next, a third embodiment of the present invention will be described. The horizontal slit material of this embodiment is substantially the same as that shown in the first and second embodiments, except that the horizontal slit material includes a stepped member made of a different material from the base material. For this reason, components that are substantially the same as those in the first and second embodiments will be given the same reference numerals and their descriptions will be omitted as appropriate.

[0086] Figure 11 is a cross-sectional view in the wall thickness direction showing the horizontal slit material according to the third embodiment installed on a floor slab with a step. As shown in Figure 11, the horizontal slit material 300 according to the third embodiment is installed to fill the gap in a horizontal slit 40, which is a horizontally arranged gap between an existing concrete structure attached below, such as a floor slab 30, and a newly constructed concrete structure that is later constructed above, such as a wall 20, and has a stepped portion S to prevent water from entering from the outside.

[0087] The horizontal slit material 300 according to the third embodiment comprises a base material portion 310, a part of which is installed on at least the upper surface 31, and a stepped fitting portion 320, which is installed to fit into the stepped portion S.

[0088] Specifically, the stepped fitting portion 320 is formed such that its bottom surface contacts the lower surface 32, and its back surface, which is on the indoor side, contacts the interface surface 33. The base material portion 310, which is placed on the upper surface 31, and the stepped fitting portion 320 are integrally formed.

[0089] Furthermore, while the base material 310 is a non-absorbent or low-absorbent phenolic foam that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and absorbing unevenness on the surface of the floor slab 30 which is the bottom surface, the stepped fitting portion 320 is made of a material that prioritizes waterproofing more than the base material 310, and the base material 310 and the stepped fitting portion 320 are integrally formed.

[0090] The stepped portion S is provided to ensure that water does not enter, and the stepped fitting portion 320 that fits into the stepped portion S in the horizontal slit 40 is required to have a waterproof function. For this reason, the stepped fitting portion 320 is made of a material that has an even greater waterproof function than the base material portion 310. Specific materials for the stepped fitting portion 320 include resins such as polyethylene and polypropylene.

[0091] In order to integrally form the base material 310 and the stepped fitting portion 320 from different materials, it is necessary to bond the joint surfaces of the base material 310 and the stepped fitting portion 320. By providing the joint surfaces of the base material 310 and the stepped fitting portion 320 in a vertical direction, it is possible to prevent water from entering the interior even if water penetrates the joint.

[0092] Even if a stepped portion S is provided in the horizontal slit 40, as in the third embodiment, by installing the horizontal slit material 300, it is possible to adequately follow the load during concrete placement and deformation during drying shrinkage, and to adequately absorb unevenness that occurs on the surface of the floor slab 30, especially on the upper surface 31, the lower surface 32, and the boundary surface 33, and furthermore, to reliably prevent water from entering the stepped portion S.

[0093] Therefore, unlike the horizontal slit material 80 disclosed in Patent Document 1, there is no need to have a laminated structure in which a first layer 81 and a second layer 82 are stacked on top of each other. As a result, there is no manufacturing process to bond the first layer 81 and the second layer 82 together, which can reduce manufacturing costs.

[0094] Furthermore, since it is not a laminated structure in which the first layer 81 and the second layer 82 are superimposed, no gaps occur between the layers. Therefore, the horizontal slit 40 can be reliably sealed, making it suitable in terms of waterproofing and fire protection.

[0095] [Fourth Embodiment] Next, a fourth embodiment of the present invention will be described. The horizontal slit material of this embodiment is substantially the same as that shown in the first to third embodiments, except that the horizontal slit material has a stepped member and a multilayer structure. For this reason, components that are substantially the same as those in the first to third embodiments will be given the same reference numerals and their descriptions will be omitted as appropriate.

[0096] Figure 12 is a cross-sectional view in the wall thickness direction showing the horizontal slit material according to the fourth embodiment installed on a floor slab with a step. As shown in Figure 12, the horizontal slit material 400 according to the fourth embodiment is installed to fill the gap of a horizontal slit 40, which is a horizontally arranged gap between an existing concrete structure attached below, such as a floor slab 30, and a newly constructed concrete structure that will be constructed later, such as a wall 20, and has a stepped portion S to prevent water from entering from the outside.

[0097] The horizontal slit material 400 according to the fourth embodiment comprises a base material portion 410, a part of which is installed on at least the upper surface 31; a stepped fitting portion 420, which is installed to fit into the stepped portion S; and an unevenness absorbing portion 430 interposed between the base material portion 410, the stepped fitting portion 420, and the floor slab 30.

[0098] In the horizontal slit material 200 according to the second embodiment, the base material 210 and the stepped fitting portion 220 are made of a non-water-absorbing or low-water-absorbing phenolic foam in order to allow them to follow the deformation of concrete during concrete placement loads and drying shrinkage, and to absorb unevenness that occurs on the surface of the floor slab 30.

[0099] By using this non-absorbent or low-absorbent phenolic foam, it is possible to adequately address unevenness on the surface of the floor slab 30. Furthermore, if an optimal material capable of addressing unevenness on the surface of the floor slab 30 is selected, that material can be interposed between the floor slab 30 and the unevenness-absorbing portion 430, as in the horizontal slit material 400 according to this embodiment.

[0100] Specifically, the stepped fitting portion 420 is formed such that its bottom surface contacts the lower step surface 32 via the unevenness absorbing portion 430, and its back surface, which is the indoor side of the stepped fitting portion 420, contacts the boundary surface 33 via the unevenness absorbing portion 430. The base material portion 410 and the stepped fitting portion 420 are formed continuously and integrally, with the base material portion 410 being placed on the upper step surface 31 via the unevenness absorbing portion 430.

[0101] In this embodiment, the base material portion 410 and the stepped fitting portion 420 are formed as a continuous, integral part. However, as in the third embodiment, the base material portion 410 and the stepped fitting portion 420 can also be formed from different materials. Furthermore, in the case of a horizontal slit 40 without a stepped portion S, as in the first embodiment, the unevenness absorbing portion 430 can be interposed between the base material portion 110 and the floor slab 30.

[0102] Even if a stepped portion S is provided in the horizontal slit 40, as in the horizontal slit 40 according to the fourth embodiment, by installing the horizontal slit material 400, it is possible to adequately follow the load during concrete placement and deformation during drying shrinkage, and the unevenness absorbing portion 430 can adequately absorb the unevenness that occurs on the surface of the floor slab 30, especially on the upper surface 31, the lower surface 32, and the boundary surface 33. [Explanation of Symbols]

[0103] 20 Walls 30 floor slab 40 horizontal slits 100 Horizontal Slit Material 110 Base material part

Claims

1. In a horizontal slit material placed in a horizontal slit, which is a slit formed horizontally in a concrete structure constructed in the vertical direction, A base material is continuously and integrally formed from a foam that is installed on the bottom surface of the horizontal slit, and is capable of following the load during concrete placement and deformation during drying shrinkage, and is also capable of absorbing unevenness on the bottom surface, and is elastic and fire-resistant. A horizontal slit material characterized by having the following features.

2. The aforementioned foam is It is a non-absorbent or low-absorbent phenolic foam. A horizontal slit material according to claim 1, characterized by the above.

3. The density of the phenol foam is, The density should be between 20 kg / m³ and 50 kg / m³. The horizontal slit material according to claim 2, characterized by the above.

4. The density of the phenol foam is, It is 29 kg / m³. A horizontal slit material according to claim 3, characterized by the above.

5. The aforementioned horizontal slit is On one side of the bottom surface in the thickness direction of the concrete structure, a stepped portion is provided to form a stepped bottom surface which is lower than the other side. Stepped fitting portion installed by fitting into the stepped portion, The horizontal slit material according to claim 1, characterized by comprising the above.

6. The base material portion and the stepped fitting portion are formed in a continuous and integral manner. A horizontal slit material according to claim 5, characterized by the above.

7. The stepped fitting portion is, It consists of a material that has a higher waterproof function than the aforementioned base material, The joining surface between the base material and the stepped fitting portion is provided in the vertical direction. A horizontal slit material according to claim 5, characterized by the above.

8. The uppermost surface of the stepped fitting portion is It is formed at a position higher than the bottom surface which is formed higher than the aforementioned stepped bottom surface. A horizontal slit material according to claim 5, characterized by the above.

9. In a slit structure in which a horizontal slit material is installed in a horizontal slit, which is a slit formed horizontally in a concrete structure constructed in the vertical direction, A base material, continuously and integrally formed from a foam that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and absorbing unevenness on the bottom surface of the horizontal slit, is installed on the bottom surface. A slit structure characterized by the following.

10. In a method for forming a slit structure in which a horizontal slit material is placed in a horizontal slit, which is a slit formed horizontally in a concrete structure constructed in the vertical direction, A base material, which is continuously and integrally formed from a foam that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and can absorb unevenness on the bottom surface of the horizontal slit, is installed on the bottom surface. A method for forming a slit structure, characterized by comprising the following features.

11. In a method for forming horizontal slit materials that are placed in horizontal slits, which are slits formed horizontally in a concrete structure constructed in a vertical direction, A process of continuously and integrally forming a base material to be installed on the bottom surface of the horizontal slit using a foam material that has elasticity and fire resistance capable of following the load during concrete placement and deformation during drying shrinkage, and absorbing unevenness on the bottom surface. A method for forming a horizontal slit material, characterized by comprising the following features.

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