JPH0443523Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a formwork concrete block for construction.

(Prior Art) A formwork concrete block shown in FIG. 5 is known as a concrete block for construction. In this formwork concrete block, the upper and lower surfaces of the web shell 3 that connects the front and rear face shells 1 and 2 are cut out in a large U-shape.
The web shell 3 is formed in such a shape that the upper and lower parts thereof are substantially removed, so that the transverse reinforcement 4 can be placed in the empty space above the web shell during masonry. Note that a large U-shaped gouge may be provided only in the upper part.

(Problem that the invention aims to solve) Since concrete blocks are porous, even if rainwater does not enter through the layer of fresh concrete poured into the voids inside the concrete block after masonry, it will cause damage to the concrete block. Rainwater permeates inside through the face shells 1 and 2 and the web shell 3. Therefore, if horizontal stripes are placed on the top surface of the web shell 3 of a conventional formwork concrete block, rainwater that permeates through the face shells 1, 2 and the web shell 3 will be absorbed into the web shell 3.
Since the upper horizontal stripes will get wet and rust will occur, as shown in
A method is used to fix the horizontal strip 4 with a wire 6 so that it is 2 cm or more above the top surface of the web shell 3.
Fixing it is troublesome, hindering work efficiency, and
Variations occurred in the height and spacing of the horizontal strips 4, and the height above the top surface of the web shell 3 was often insufficient. In the dropping reinforcement method in which vertical reinforcements are inserted from the topmost block after the blocks are assembled, it is impossible to fix the horizontal reinforcements 4, and the position is uncertain, making it difficult to insert the dropping reinforcements.
Particularly when arranging a plurality of horizontal stripes, it is not possible to arrange these transverse stripes in parallel with an interval between them.

This invention provides a formwork concrete block for construction in which two to three horizontal reinforcements can be arranged in parallel at intervals, easy insertion of drop reinforcements, and no rust on the horizontal reinforcements. It is.

(Means for solving the problem) At least the upper surface of the web shell 3 connecting the front and rear face shells 1 and 2 is the face shell 1,
2, in which the face shells 1 and 2 and the web shell 3 contain a waterproofing agent, and the upper surface of the web shell 3 has a horizontal groove for installing horizontal stripes. It is characterized in that 2 to 3 3a are formed at intervals equal to or larger than the thickness of the vertical stripes.

In addition, waterproofing agents include inorganic waterproofing agents such as calcium chloride type, sodium silicate type, silica powder type, higher fatty acid type, paraffin type, asphalt emulsion type, polymer dispersion type, and water-soluble polymer type. Organic waterproofing agents such as

(Function) By fitting the horizontal reinforcements 4 into the horizontal grooves 3a on the upper surface of the web shell 3 during masonry, the horizontal reinforcements 4 can be
The horizontal bars 4 are fixed parallel to each other at intervals, and gaps are automatically formed between these horizontal bars 4 in which vertical bars can be inserted. On the other hand, since rainwater does not permeate into the interior from the surfaces of the face shells 1 and 2, the horizontal stripes 4 on the horizontal grooves 3a of the web shell 3 are not wetted by rainwater permeating from the outside.

(Example) The formwork concrete blocks shown in Figs. 1 and 2 are mainly made of calcium stearate,
It was obtained by mixing 1.5 to 2.0% by weight of a waterproofing agent containing a small amount of anion activator and methyl cellulose to the cement, and adding other ingredients such as cement, crushed stone, sand, etc. in the usual proportions, kneading, and molding. The front and rear face shells 1 and 2 are connected by two web shells 3 and 3, and there is a large vertical hole 7 between the web shells 3 and 3, and a half of the vertical hole 7 on the outside of the web shells 3 and 3. Vertical grooves 8 of different widths are formed respectively. The web shell 3 has a U-shaped shape in which the upper and lower parts are greatly hollowed out relative to the upper and lower surfaces of the face shells 1 and 2, respectively.
That is, it has an H-shape so that the left and right vertical holes 7 and vertical grooves 8 communicate with each other, and three semicircular horizontal grooves 3a into which horizontal stripes 4 can be fitted are formed on the upper surface of this web shell 3. .

The above-mentioned architectural formwork concrete block is built up to a height of about 3 m on a horizontal foundation on which vertical reinforcements 5 of about 1 m are erected at predetermined intervals, and at that time, two horizontal reinforcements 4 are installed at each level. The web shells 3 are arranged in rows and fitted into the horizontal grooves 3a at both ends of the web shell 3, and after being stacked up to the top level, stripping reinforcements (vertical reinforcements) are inserted from above. After the reinforcement arrangement is completed, fresh concrete or mortar is poured into the vertical holes 7 and vertical grooves 8 between the vertically and horizontally adjacent formwork concrete blocks.

In the embodiment shown in FIGS. 3 and 4, a large U-shaped recess is formed only in the upper part of the web shell 3, and the distance between the left and right web shells 3 is narrowed to reduce the area of the vertical hole 7. , the area of the vertical groove 8 is widened.

In the above embodiment, the number of lateral grooves 3a may be reduced to two. Further, on the upper and lower surfaces of the face shells 1 and 2, it is possible to form uneven stripes or steps for forming driving joints that fit into each other during assembly.

(Effects of the invention) The architectural formwork concrete block of this invention contains a waterproofing agent and has water repellency.
Rainwater will not seep in from outside. Then, there are 2 to 3 horizontal grooves for arranging horizontal stripes on the top surface of the web shell.
Because they are spaced at intervals equal to or greater than the thickness of the vertical stripes,
It is easy to position the horizontal reinforcements during masonry, and there is no misalignment, and a gap larger than the thickness of the vertical reinforcement is automatically created between the horizontal reinforcements, making it easy to insert drop reinforcements. , its position is stabilized, and there is no need to bind it with vertical reinforcements as in the past, improving the efficiency of masonry work. Moreover, since rainwater does not penetrate as described above, the horizontal stripes fitted in the horizontal grooves do not come in contact with rainwater and rust.

[Brief explanation of drawings]

Fig. 1 is a side view of an embodiment of this invention, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a side view of another embodiment.
FIG. 4 is a plan view of FIG. 3, and FIG. 5 is a side view of a conventional formwork concrete block. 1, 2...face shell, 3...web shell, 3a...horizontal groove, 4...horizontal stripe, 5...vertical stripe.

Claims (1)

[Scope of utility model registration request] At least the top surface of the web shell connecting the front and rear face shells is U from the top surface of the face shell.
In a concave architectural formwork concrete block, the face shell and web shell contain a waterproofing agent, and the upper surface of the web shell has 2 to 3 horizontal grooves for installing horizontal stripes, and thick vertical strips. Architectural formwork concrete blocks characterized by being formed with a spacing of more than 300 mm.