JP3364082B2 - Embedded material for concrete slab, substrate for concrete slab having the embedded material, and concrete slab using the substrate - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an embedding material that is embedded in a concrete slab substrate that is produced in a factory and is carried into a building construction site to be assembled as a slab.
The present invention relates to a concrete slab substrate having the embedding material, and a concrete slab using the substrate.

[0002]

2. Description of the Related Art As a construction method for concrete slabs, in order to reduce the weight and improve the sound insulation effect, as shown in FIG. 9, a synthetic resin foam molding such as expanded polystyrene is performed in a factory or in a sub facility near a construction site. An embedding material 1 made of a product is fixed on a concrete substrate 3 having a truss bar 2 and the like by a fastener to manufacture a hollow concrete slab substrate A, which is carried into a construction site, and shown in FIG. As shown in the figure, the so-called hollow concrete slab is placed between the beams B of the required number of frames and the upper chord member of the truss reinforcement 2 is used as a spacer to attach the slab top reinforcement 4 and the like, and then cast in-place concrete C. Construction methods for constructing CS are widely used.

FIG. 11 and FIG. 12 show an example of the embedding material 1 which is put to practical use, and has an overall box-like (rectangular) shape having a surface 10, a side wall 11 and a partition wall 12. ,
The side wall 1 has a plurality of hollow portions S whose one side is open inside.
1 includes a notch 13 for driving a locking tool (not shown).
Are formed in plural. In this embedding material, a predetermined number of the concrete is arranged on the concrete for a substrate cast in the formwork for the concrete substrate while the concrete is uncured.
Drive the fastener through 3 through to the inside of the concrete,
When the concrete is solidified, it is integrated with the concrete.

As another method for fixing the embedding material to the concrete for a substrate, for example, as described in the full-text specification of Japanese Utility Model Publication No. 54-140514, a subsidizing agent such as an adhesive agent is used without using a locking tool. To be fixed in JP-B-57-4700
As described in Japanese Patent Publication No. 7, a joint such as a concave portion and a convex portion is formed on a back surface, a side surface, and the like of an embedding material, which is attached to concrete, and the joining portion of the adhered surface portion is in an uncured state. So that it is buried in the concrete substrate,
The one in which the embedding material is fixed to the concrete by solidifying the concrete, or JP-A-4-2160.
As described in Japanese Patent Publication No. 10, a hole that penetrates the embedding material is formed in the embedding material, and the embedding material is arranged on the concrete surface in a state where the substrate concrete is uncured, and a part of the through hole. By injecting uncured concrete into and solidifying it,
Those in which the embedding material is fixed to concrete are also known.

[0005]

In the production of a concrete slab substrate, a plurality of embedding materials are arranged on the substrate concrete in an uncured state, and a locking tool is placed at a predetermined position on the embedding material. While it is excellent to securely fix the embedding material to the concrete, it requires a large amount of work to secure and fix the locking tool. There is a need for other methods for fixing the potting material to the concrete substrate. Since the method of fixing with the aid of an adhesive does not require driving of a locking tool,
Although the work can be speeded up to some extent, there is the disadvantage that an adhesive application work is required and that if the concrete surface is uneven, sufficient adhesion cannot be obtained.

[0006] A method of forming a joint portion such as a concave portion or a convex portion on the concrete adhering surface of the embedding material and fixing it by embedding it in the concrete, and a method in which a through hole is provided in the embedding material and the through hole is not formed in the through hole. The method of inflowing hardened concrete and fixing it by solidification is to simply place the embedding material on the uncured concrete surface, press it to some extent from above if necessary, and wait for the solidification of concrete,
It contributes to the simplification and speeding up of work.

However, the embedding material made of a synthetic resin foam-molded product is lightweight and has a large buoyancy, and the uncured concrete surface is not necessarily a flat surface. Therefore, the embedding material is arranged on the concrete surface. By itself, there is no guarantee that it will be placed parallel to the reference plane. Further, even when pressing from above as necessary, it is not easy for the operator to press the entire surface of the embedding material with the same force, and uneven inclination from above may further increase the degree of inclination. Furthermore, the amount of the embedding material embedded in the uncured concrete may vary depending on the magnitude of the pressing force. This causes a partial change in the thickness of concrete as a substrate, which may lead to a decrease in the yield strength of the concrete substrate. In order to avoid that, at the construction site,
It is necessary for an operator to perform position and leveling work using a ruler or a ruler, which is a disadvantage that work efficiency is reduced.

Further, when a concrete slab is constructed using this type of concrete slab substrate, the thickness of the concrete to be cast on the embedding material is defined by regulations. When the embedding material fixed on the concrete slab substrate is inclined, thick and thin parts of the cast concrete partially occur, and it is impossible to cast concrete to the specified thickness. Can not. Also, when pressing from above, if the subsidence amount of the embedding material due to pressing is different for each embedding material, the concrete substrate as a whole will have thick and thin parts of the poured concrete. , Not preferable.

An object of the present invention is to provide a substrate for concrete slab in which an embedding material is arranged on a concrete surface while the concrete for the substrate is uncured and the embedding material is fixed to the concrete without using a fastener. To eliminate the above-mentioned inconvenience occurring in the manufacturing method, more specifically, to allow the embedding material to be easily and reliably arranged horizontally with respect to the concrete substrate and with a predetermined embedding amount, To provide an embedding material for a concrete slab and a substrate for a concrete slab having the embedding material, by which the thickness of the concrete cast on the embedding material can be always made to be a reference value at the time of on-site construction. It is in. Still another object of the present invention is to provide a concrete slab using the substrate for concrete slab as described above.

[0010]

According to the present invention, the above object is to provide a mark for leveling on a side wall as an embedding material formed of a synthetic resin foam-molded product at the time of manufacturing a concrete slab substrate. This is achieved by using the provided one. Although it is preferable that the marks are provided on all of the side walls, the intended purpose can be achieved by providing the marks only on two opposing side walls.

The shape of the embedding material is arbitrary, and is shown in FIGS.
As shown in 2, the whole is rectangular and has a hollow part on the back side, a solid one, or one or more recessed grooves on the front side, water and steam drain on the back side May have a large number of openings for the like. In addition,
It is not always necessary to form the locking notch 13 shown in FIGS. 11 and 12 in the embedding material.

The mark for leveling formed on the side wall of the embedding material is used by an operator who arranges the embedding material on the surface of the uncured concrete for a substrate. It is arbitrary as long as it can confirm the posture and position of the embedding material by looking at the mark, but at a certain distance from the ridgeline on the back surface side of the embedding material, preferably at a position of about 10 mm, continuously or in parallel with the ridgeline. Intermittently formed recesses or protrusions, or projections or recesses arranged at appropriate intervals are particularly preferable marks. Further, the mark may be a scale in the thickness direction, which is arranged on the side wall at a predetermined interval.
Further, these marks may be colored, and in that case, the function as the mark is further exerted. More preferably, this mark is the side wall position where the surface of the uncured concrete will be located when the back surface side of the embedding material is partially embedded at the position as designed from the surface of the uncured concrete for substrate. Alternatively, it is formed in the vicinity thereof. Further, a continuous or intermittent concave line may be integrally provided on the side wall of the embedding material at a position below the convex line as the mark, and the bite of concrete into the concave line, the concrete of the embedding material Is more stable. The method of forming the mark on the side wall of the embedding material is arbitrary, and it may be integrally molded at the same time as the molding of the embedding material.
A stamp or the like may be used, or a method such as engraving with a roller having a protrusion may be used.

The concrete slab substrate using the embedding material according to the present invention is preferably manufactured as follows. Similar to the production of a conventional substrate for concrete slabs, required reinforcement is carried out in a formwork, and concrete for substrate is placed therein with a predetermined thickness. While the cast concrete is uncured, the embedding material is placed at a predetermined position on the concrete surface. The back side of the embedding material is partially embedded in the cast concrete by pressing the embedding material from above. At this time, the operator presses while visually confirming the positional relationship between the position of the mark provided on the side wall of the embedding material, which is preferably four circumferences, and the reference plane, for example, the cast concrete surface. Thereby, the levelness of the entire embedding material can be easily and surely achieved, and a predetermined embedding amount can also be reliably ensured. At that time, if necessary, a small number of locking tools may be used.

After arranging the embedding material, the embedding material is cured and solidified by holding the embedding material with or without pressing the embedding material from above by an appropriate means to fix the embedding material on the concrete. After fixing, remove the mold. By adopting the manufacturing method as described above, it becomes unnecessary to use the locking tool for fixing the embedding material, and the work can be simplified and speeded up. Further, the embedding material can be easily fixed on the concrete for a substrate in a posture according to the design value. As a result, the proof stress of the concrete substrate can be maintained at a predetermined value, the thickness of the poured concrete at the construction site becomes constant, and a concrete slab with a predetermined strength can be reliably manufactured.

When an embedding material having a groove formed on the surface side is used, equipment pipes required to be placed in a concrete slab are laid through the groove,
After that, in-situ concrete is poured. As a result, the pipe distance can be shortened, and unnecessary cross-section defects in the concrete slab can be avoided.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail based on the following examples. 1 to 4 are perspective views showing some examples of embedding materials for concrete slabs according to the present invention. In these examples, the embedding materials 1a are all described with reference to FIGS. 11 and 12. Similar to the embedding material 1, it is a synthetic resin foam molded article such as expanded polystyrene, and has grooves 15 formed vertically and horizontally on the surface 10, and is used as a passage for equipment piping during concrete slab construction. The concave groove 15 is not essential, and the surface 10 may be flat.

A mark for leveling according to the present invention is provided on the side wall 11 of the embedding material 1a on four sides. In the example of FIG. 1, a predetermined distance L from the ridge line 16 on the back surface side of the embedding material 1a.
A large number of elongated ridges 20 are intermittently integrally formed at a position above and parallel to the ridge line 16 at intervals.
Preferably, the distance L is about 10 to 20 mm. Figure 2
In the above example, a continuous continuous ridge 21 is integrally formed on the side wall of four rounds, instead of the many elongated ridges 20 which are intermittently formed.

In the example shown in FIG. 3, the scales 22 for indicating the distance in the thickness direction of the side wall 11 are printed on the side wall 11 of four turns at a plurality of positions at predetermined intervals. Although not shown, a numerical scale may be attached, and from the bottom,
Numbers may be attached only to the places of 10 mm, 15 mm or 20 mm. The scale 22 may be integrally formed at the time of molding by a molding die instead of printing.

FIG. 4 shows another example of a mark for level adjustment. As shown in FIG. 4a, a pattern 23 such as a star mark may be formed in a horizontal line, and a side wall as shown in FIG. 4b. The recessed line 24 may be formed. This groove 24
Is not limited to the continuous one shown in the figure, and may be an intermittent recess. Further, the above-mentioned mark is, for example, a position of 10 mm in the thickness direction, 15 m, except for the case of the scale 22 of FIG.
It may be formed in a plurality of stages such as two stages and three stages such as a position of m and a position of 20 mm. further. The marks may all be of the same type, or may be a combination of different types, such as integrally forming the concave line 24 below the convex line 21 as the mark as shown in FIG. 4c. Figure 4
In the case of forming a recessed strip as shown in Fig. 4b and Fig. 4c, the concrete is invaded into the recessed strip, which further stabilizes the fixing of the embedding material to the concrete.

Next, a method for manufacturing a concrete slab substrate using the embedding material 1a will be described with reference to FIGS. In FIG. 5, reference numeral 30 denotes a concrete substrate mold, and after the truss bars 2 and the like have been arranged in the mold 30, concrete 3 for a substrate is poured. Next, as shown in FIG. 6, the embedding material 1a according to the present invention is placed at a predetermined position on the concrete surface while the cast concrete is uncured.
Are arranged by a worker or by an appropriate robot arm or the like.

FIG. 7 is a partial cross-sectional view showing a part of FIG. 6 in an enlarged manner, and the embedding material 1a after the placement is in a posture in which the back surface is brought into close contact with the surface of the uncured cast concrete. The embedding material 1a made of a synthetic resin foam-molded product is relatively lightweight and is in a floating state as it is. Even if the concrete is cured and solidified in this state, the concrete 3 and the embedding material 1a are integrated. There is no such thing, and when force is applied from the side, the two easily separate. In order to avoid this, after arranging the embedding material 1a on the concrete surface, the operator manually pushes the embedding material 1a from above as shown by an arrow F in FIG. At the time of the pressing, the operator should make a mark for leveling formed on the side wall of the embedding material 1a, in which the convex strip 21 is a reference plane in the illustrated example, and is always parallel to the top surface of the cast concrete in this example. Finally, as shown in FIG. 8, the ridge 21 formed on the side wall 11 of the embedding material 1a, preferably four laps, is equally cast on the top surface of the concrete. The embedding material 1a is embedded up to the depth at which it touches or is somewhat embedded. Thereby, the embedding material 1a is fixed to the surface of the concrete 3 for a substrate in a posture in which the back surface side is embedded in the concrete by a predetermined amount and in a horizontal state. That is, the ridges 21 are not
When it is formed at about mm, the embedding material 1
The a is fixed in a state where the lower end side of about 10 mm is embedded in uncured concrete.

In that state, the concrete is cured and solidified. Thereby, the embedding material 1a is firmly integrated with the concrete 3 and is not separated. The upper surface side of the embedding material 1a may be pressed by an appropriate means so that the embedding material does not float up during curing and solidification, but normally, sufficient integration is achieved without such means. To be done.

In fixing a conventional embedding material to a concrete surface for a substrate, in order to secure the levelness of the embedding material, an operator used a ruler or a ruler to perform position and leveling work. In the embedding material according to the present invention, since a mark for leveling is formed on the side wall of the embedding material, it is easy and reliable to visually check the level without using any special tool. A certain degree and a certain amount of embedding can be achieved, resulting in speeding up the work.

Press-fitting the embedding material is not a manual operation of the operator,
It is also possible to use an appropriate pressing device or the like. Even in that case, the person who operates the press machine can visually follow the position of the mark for leveling the embedding material,
It is possible to easily confirm whether or not the embedding material has reached the predetermined embedding distance. Form 3 after the concrete has solidified
From 0, the concrete slab substrate is taken out, and thereafter, it is placed between the beams B and B of the skeleton at the construction site and the cast-in-place concrete C is cast in the same manner as in the conventional method, and the hollow concrete slab CS is constructed.

[0025]

As is apparent from the above description, by using the embedding material for concrete slab according to the present invention, the operator can easily and surely insert the embedding material without using any special tool. It becomes possible to arrange the concrete surface for hardening the substrate at a predetermined depth and in a horizontal state.
As a result, the embedding material will be placed at the position of the designed value for the manufactured concrete slab substrate, and the yield strength of the concrete slab substrate will not be reduced, and the concrete slab substrate will be laid. The strength of the concrete slab is also constant.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an embedding material according to the present invention.

FIG. 2 is a diagram showing another example of an embedding material according to the present invention.

FIG. 3 is a view showing still another example of the embedding material according to the present invention.

FIG. 4 is a view showing still another example of the embedding material according to the present invention.

FIG. 5 is a cross-sectional view illustrating a state in which concrete for a substrate is cast on a formwork.

FIG. 6 is a cross-sectional view illustrating a state in which an embedding material is arranged on cast concrete.

FIG. 7 is an enlarged view showing a state in which an embedding material is arranged on cast concrete.

FIG. 8 is a diagram showing a state where a part of the embedding material is embedded in an uncured concrete surface.

FIG. 9 is a bird's-eye view showing a concrete slab substrate.

FIG. 10 is a diagram showing an example of a concrete slab using a concrete slab substrate.

FIG. 11 is a diagram showing an example of a conventional embedding material.

FIG. 12 is a diagram showing an example of a conventional embedding material.

[Explanation of sign]

A ... Concrete slab substrate, 1 ... Conventional embedding material, 2 ... Truss streak, 3 ... Concrete substrate, 1a ... Embedding material according to the present invention, 10 ... Embedding material surface, 11 ... Embedding material side wall 20-24 ... Marks for level adjustment

Claims (7)

(57) [Claims] 1. An embedding material for concrete slabs, which is made of a synthetic resin foam-molded product and has side walls provided with marks for level adjustment. 2. An embedding material for a concrete slab, which is made of a synthetic resin foam-molded product and is fixed on the concrete surface in a state where a part of the back surface side is embedded in concrete as a substrate. An embedding material for concrete slabs, characterized in that a mark indicating the embedding position is provided on the side wall of the. 3. The embedding material for concrete slabs according to claim 1 or 2, wherein the mark is formed of a ridge and is integrally formed on the side wall of the embedding material. 4. The embedding material for concrete slabs according to claim 3, wherein a recessed line is integrally formed on a side wall of the embedding material at a position below the convex line which is the mark. 5. The embedding material for concrete slabs according to claim 1 or 2, wherein the mark is a recessed line and is integrally formed on a side wall of the embedding material. 6. A substrate for concrete slab, wherein the embedding material for concrete slab according to claim 1 or 2 is embedded in a concrete substrate so that the mark provided on the side wall substantially coincides with the concrete surface. 7. A concrete slab formed by laying a required number of the concrete slab substrates according to claim 6 and pouring cast-in-place concrete on the upper portion thereof.