JPS6032248Y2 - Embedment material for concrete slabs - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an embedding material used in the construction of concrete slabs, and attempts to provide an embedding material suitable for preventing vibration of concrete slabs.

Various types of embedding materials have been proposed for use in the construction of concrete slabs used as flooring and ceiling materials in buildings. Typical examples include iron plates and paraffin-impregnated cardboard. It was something.

However, with steel plates, increasing the wall thickness to maintain strength will lead to a significant increase in weight, and if you try to provide ribs for load-bearing properties, the manufacturing workability will be extremely poor. In addition, when it is made of cardboard, it easily absorbs water and the cardboard swells and changes, so there is a risk that cracks will occur in the concrete after pouring.

Therefore, in this invention, we have attempted to obtain an embedding material that can eliminate the drawbacks and inconveniences of the conventional technology and is also excellent in terms of preventing vibration (secondary vibration).The structure is made of foamed synthetic resin. It is made of a molded product and is characterized by having an appropriate number of grooves formed on the surface side that do not penetrate inward.

Next, embodiments of this invention will be illustrated below with reference to the drawings.

Reference numeral 1 denotes an embedding material, which is made of a hard foam molded product of synthetic resin, such as a molded product of expanded polystyrene.

2 is an appropriate number of grooves formed on the surface side of the embedding material 1, with a depth that does not penetrate inward, and is formed in the longitudinal direction of the embedding material 1 as in the case of Figs. 1 to 3. In addition to the case where it is formed in the short direction as shown in FIG. 7, it is also possible to form it in the short direction as shown in FIG.

In particular, in the case of Fig. 8, if the depth of the groove is varied vertically and horizontally and a step is created, it becomes easy to arrange reinforcement in both directions, and it is also convenient to use this groove for piping.

Moreover, in any of these cases, the groove length may extend to the entire length or may extend halfway.

Furthermore, reference numeral 3 denotes a plurality of recesses formed on the back side of the embedding material 1, which are formed without penetrating the front side, and whose opening ends are large enough to withstand pressure when stepped on by a worker. It is formed to the desired dimensions and helps reduce overall weight.

In addition, the upper part 4 located at the back of the concave part 3 has an arc shape.
It is preferable to do this in such a way that it forms an arch shape and does not easily impair load-bearing properties.

Reference numeral 5 designates cutout steps formed at multiple locations around the embedding material 1 for piercing the locking tool, and in consideration of usage, the upper side is formed with a wide cutout. The wall thickness is increased at the location where the cutout step portion 5 is formed to prevent the wall thickness from decreasing due to the formation of the cutout step portion 5.

Further, numeral 6 indicates an example of a fixed fixture with a head used as a locking fixture.

As the foamed molded product constituting the above-mentioned embedding material 1, other foamed molded products can be used in addition to the molded product made of expanded polystyrene.

This device is constructed as described above, and one example of its use is to place the embedded material 1 made of the foamed molded product into the base during the curing process where the foundation that will become the bottom side of the slab, that is, the concrete substrate C4 has not yet solidified. The embedding material 1 is placed with the concave portion 3 side facing down, and the fixing metal fittings 6 are inserted as locking tools from the positions of the cutout steps 5 formed at multiple locations around the embedding material 1 to attach the embedding material 1 to the concrete substrate. C (see Figure 4).

Next, after fixing the embedded material 1 to the concrete substrate C by solidifying the concrete substrate C, concrete C' that will become the upper side of the slab is poured. Since an appropriate number of grooves 2 that do not penetrate into the concrete are formed, a portion of the concrete C' flows into the grooves 2 of the embedded material 1.

With the concrete C' entering the groove 2 like this, the concrete C' solidifies and the concrete,
cl are integrated to provide a concrete slab in which the embedding material 1 is embedded (see FIG. 5).

In addition, before pouring the upper concrete C', usually the reinforcement 10, 10' is placed as appropriate according to the design conditions, and the reinforcement 10' above the groove 2 (see the state after construction in Figure 6), etc. is applied.

Further, as described above, not only can concrete slabs containing embedded materials be formed by on-site construction, but also concrete slabs that are integrated into units can be obtained by factory production.

As mentioned above, the embedded material according to this invention has an appropriate number of grooves formed on the surface side that do not penetrate inward, so when constructing a concrete slab, concrete is poured into the grooves and hardens as described above. Therefore, by constructing such a part as a concrete slab, the effect of preventing vibration (secondary vibration) after construction is increased.

Therefore, as an embedding material with grooves, it is very useful for vibration prevention.

In addition, if multiple recesses are formed on the back side of the embedding material that do not penetrate to the surface, compared to solid foam molded products,
It is economical because it saves a lot of material, and it is stable with little floating up, and it can also be used when sparks fly during welding of reinforcing bars etc. after placing the embedded material. , it becomes easier for sparks to penetrate, eliminating the risk of being trapped inside and causing a fire.

In addition, in practice, if the size of the recess is made so that it can withstand the pressure that a worker steps on, it will be able to withstand the load sufficiently even if the worker steps on it during construction, and the worker's foot will sink into the through hole. There will be no more irritation.

Furthermore, in this invention, the embedding material is made of a foam molded product as described above, so the groove 2 described above can be used for piping such as electric conduit pipes and gas pipes, but the embedding material must be partially cut. This is a very convenient thing that you can easily respond to.

As mentioned above, this invention can exhibit various excellent effects as an embedding material used in concrete slab construction.

[Brief explanation of drawings]

The figures illustrate the embodiment of this invention, and Fig. 1 is a perspective view, Fig. 2 is a plan view, Fig. 3 is a sectional view taken along the line ■-■, and Fig. 4 is an illustration of fixing to a concrete substrate. Figure 5 is a cross-sectional view showing the condition, and Figure 5 is a cross-sectional view when the concrete slab is being constructed with the upper side concrete poured from the previous condition.
The figure is a cross-sectional view of the case where reinforcement is added during concrete slab construction, and FIGS. 7 and 8 are perspective views of modified examples. 1...embedding material, 2...groove, 3...
...Concave part, 5...Cut-out step part, 6...
Fixing metal fittings, , cl... Concrete.

Claims (1)

[Claims for Utility Model Registration] 1. An embedding material for concrete slabs, which is made of a synthetic resin foam molded product, and is characterized by having an appropriate number of grooves formed on the surface side that do not penetrate inward. 2. The concrete slab embedding material according to claim 1 of the above-mentioned utility model registration claim, wherein a plurality of recesses that do not penetrate to the surface are formed on the back side. 3. The concrete slab embedding material according to claim 1 of the above-mentioned utility model registration claim, wherein cutout steps are formed at a plurality of locations around the embedding material body for piercing the anchor.