JP3395990B2 - Method of manufacturing concrete slab for joint - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a concrete slab for jointing, which can be used as a discarded form when joining concrete girders or columns. . 2. Description of the Related Art Conventionally, when the next girder is to be joined with a concrete girder, a wooden (veneer) formwork is removed, and the end face of the cast concrete is dropped or roughened. After the surface area is increased, concrete is inherited. [0003] However, in the above-mentioned conventional method, it is necessary to perform a work of removing a wooden formwork, a work of dropping a file, a work of roughening, and the like. It was hanging. SUMMARY OF THE INVENTION The present invention has been proposed in view of the above. After laying an aggregate in a frame, a holding material liquid is supplied to partially remove the aggregate. Buried inside, dissolve agar
Striking joint, characterized in that by Da設concrete to form a through hole rebar are inserted, and to embed the aggregate on the surface before the concrete is hardened after curing the holding material liquid consisting of liquid The present invention relates to a method for manufacturing a concrete slab. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. First, an aggregate 2A is laid in a frame 1 as shown in FIG. The material of the frame 1 is not particularly limited as long as it has a liquid-tightness that does not leak the holding material liquid 3 described later.
As for A, its type and particle size are not limited.
For example, those having a particle size of 10 to 25 mm can be used. [0007] The holding material liquid 3 is supplied so that a part of the aggregate 2A is buried. The holding material liquid 3 is used for a short time.
And hardly changes in volume between when hardened and when liquid
Use agar solution. This agar solution can be reused, is mostly water, is inexpensive, can be liquefied or coagulated at a temperature that is relatively easy to handle, and has a low viscosity when liquefied. is there. Of course,
When the holding material liquid 3 adheres to the surface of the aggregate 2A, the contact with the concrete 4 to be poured later is hindered, and the holding material liquid 3 is separated without obtaining sufficient adhesive strength (burial strength). It is desirable to take great care when supplying. Next, as shown in FIG.
After hardening, concrete 4 is poured. At this time, a frame portion (not shown) for through holes is installed in advance and concrete 4
By digging or using an excavator (not shown) on the concrete 4 in a sufficiently soft state immediately after casting.
The through holes 5 are formed. The size of the diameter of the through hole 5 is not particularly limited, either.
m may be formed. Before the surface of the poured concrete 4 hardens, an aggregate 2B similar to the aggregate 2A is embedded. If the embedding of the aggregate 2B is performed according to the laying of the aggregate 2A, the physical properties of the front and back of the obtained product 6 are the same. After the concrete 4 is sufficiently cured, it is taken out of the frame 1 to obtain a product (concrete flat plate for joint) 6 as shown in FIG. 1C. When using the concrete flat plate 6 obtained as described above to connect the next girder with a concrete girder as shown in FIG. 2, a reinforcing wire such as a reinforcing bar is inserted into the through holes 5. a, and the concrete flat plate 6 for jointing is used as a mold. At this time, the aggregates 2A and 2B protrude from the front and back of the joint concrete plate 6, respectively, to have a large surface area, and the bonding strength with the jointed concrete 7 becomes extremely high. Also, if the concrete flat plates 6 for connection are previously set at appropriate intervals, the concrete 7 can be continuously set and the construction time is extremely short. Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and may be implemented in any manner unless the configuration described in the claims is changed. Can be. [0013] In summary, the present invention makes it possible to extremely simply produce a concrete slab for jointing, which can be used as a discarded frame when joining concrete girders or columns. is there. According to the present invention, a concrete slab for joining can be used for joining a girder or a column extremely easily and in a short time as compared with a conventional method using a wooden formwork.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a production process of one embodiment of a concrete slab for joining. FIG. 2 is a schematic perspective view showing an example of a construction for joining a concrete girder using the joining concrete flat plate of FIG. [Description of Signs] 1 Frame 2A, 2B Aggregate 3 Retaining material liquid 4 Concrete 5 Through hole 6 Concrete plate a for jointing a Reinforcing wire

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04G 21/02 103 E04B 1/16

Claims (1)

(57) [Claims] [Claim 1] After laying aggregate in the frame, agar solution
A part of the aggregate is buried in the holding material liquid by supplying a holding material liquid consisting of, and after hardening the holding material liquid, concrete is poured and a through hole through which a reinforcing wire or the like is inserted is formed. A method of manufacturing a concrete slab for jointing, wherein an aggregate is embedded in the surface before the concrete hardens.