JPH01310061A - Concrete placing formwork and formation of concrete wall using that formwork - Google Patents

Abstract

PURPOSE:To simplify a work by placing concrete after laminating a water conveying cushion sheet and a permeable filter sheet on the concrete placing surface of a formwork, and curing the placed concrete with the remaining filter sheet. CONSTITUTION:A water conveying cushion sheet 3 is fixed to the concrete placing surface of a formwork main body 2, and a permeable filter sheet 4 is so laminated on the sheet 3 as to be capable of being peeled off. Then, concrete 9 is placed in the formwork 1 and moisture accruing from the concrete 9 is drained via the sheets 4 and 3. Furthermore, after the concrete 9 is cured, the main body 2 is removed, together with the sheet 3 and the sheet 4 is made to remain on the concrete placed surface. In addition, the concrete 9 is insulated with the sheet 4 and wet cured. According to the aforesaid construction, it is unnecessary to specifically treat a curing sheet and the like, and a work can be simplified.

Description

[Detailed Description of the Invention] 1. The present invention can remove and eliminate moisture generated from concrete during concrete placement, and therefore does not leave any blisters on the concrete placement surface. Furthermore, the present invention relates to a concrete casting form that can keep concrete warm during curing, and a method of forming a concrete wall using the form.

Conventionally, formwork made of wooden plywood (veneer board) or iron frames has been used for concrete pouring, but these formworks are used to pour concrete and harden it. When this happens, the concrete surface in contact with the formwork will have traces of blisters caused by the moisture mixed in the concrete, as well as fine irregularities (so-called junkers), which will cause problems when performing post-processing such as mortar finishing. It had become.

For this reason, recently, a water-permeable layer has been installed on the surface of the formwork, as described in Japanese Patent Application Laid-Open No. 11766/1983, for the purpose of actively discharging the water present on the surface of concrete. There have been proposals for molds in which a large number of through-holes are formed in the formwork to drain excess water and air bubbles.

Shujiri Eiga Nukito yo j top note 1! When pouring concrete using these formworks, it is possible to remove and eliminate excess moisture generated from the concrete during pouring, but it is also possible to
After removing the formwork, it is necessary to cover the concrete pouring surface with a curing sheet or the like to keep the concrete warm. Furthermore, during curing, water is constantly sprinkled onto the surface of the concrete to prevent rapid drying and shrinkage of the concrete. For this reason, there is a problem in that curing when pouring concrete on a slope requires a great deal of labor.

The present invention has been developed in view of the above circumstances, and is capable of removing and eliminating water generated from concrete during concrete pouring, thereby not leaving any blisters on the concrete surface, and furthermore keeping the concrete warm during curing. An object of the present invention is to provide a formwork for concrete pouring that can be used to place concrete, and a method for forming a concrete wall using the formwork.

In order to achieve the above-mentioned object, the present invention has a structure of a formwork for placing concrete, in which a water-conducting buffer sheet is fixed to the surface of the main part of the formwork on the concrete placing side. A water permeable filter sheet is removably laminated on a buffer sheet. In addition, as a method for forming concrete walls, after pouring concrete using the formwork described above, the buffer sheet and filter sheet are separated and the formwork is removed, while the furnace sheet remains on the concrete pouring surface. Let me.

The furnace material sheet is used to keep concrete warm and moist. In this case, in areas where there are severe outside temperature fluctuations, it is preferable to spray a heat insulating material onto the filter sheet left on the surface of the concrete to keep it warm and moist.

Here, the above-mentioned buffer sheet includes a synthetic resin net, a synthetic resin corrugated sheet, a water-impermeable plastic film, and a large number of hollow plastic disc-shaped protrusions with elasticity, each of which has air sealed inside and whose interior becomes an independent air chamber. A sheet or the like can be used in which the furnace material sheets are integrally protruded in a zigzag manner at a predetermined distance from each other, and non-woven fabrics, woven fabrics, etc. can be used as the furnace material sheet.

- In the formwork of the present invention, concrete is placed on the side of the furnace material sheet, but when concrete is poured, moisture generated from the concrete is transferred to the furnace material sheet of the formwork and further to this furnace material sheet. The rainwater flows through the buffer sheets, flows through these rainsheets, and is removed to the outside, thereby reliably preventing the formation of blisters and fine irregularities on the concrete pouring surface, which allows the concrete surface to be poured cleanly. can be set. In addition, when pouring concrete using this formwork to form a concrete wall, after pouring and hardening the concrete using this formwork, separate the buffer sheet and filter sheet and replace the formwork. At the same time as it is removed, the furnace material sheet is left on the concrete pouring surface, and the concrete can be kept warm and moistened with this furnace material sheet.Furthermore, by spraying a heat insulating material onto the filter sheet left on the concrete pouring surface. , it is possible to perform even better heat retention and moist curing, and to prevent rapid drying shrinkage of concrete. Therefore, there is no need to perform heat-insulating treatment on the concrete surface after concrete placement, such as stretching a curing sheet, and there is no need to constantly sprinkle water on the concrete surface to prevent rapid drying shrinkage of the concrete. This simplifies the work of forming concrete walls.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Fig. 1 shows a formwork 1 for pouring concrete according to an embodiment of the present invention.
A water-conducting buffer sheet 3 is fixed to the concrete pouring side surface of a water-impermeable formwork body 2 such as a synthetic resin board, and a water-permeable filter sheet 4 is removably laminated on top of this buffer sheet 3. It is said that the configuration is as follows. Here, as the buffer sheet 3, a material having water permeability itself, such as a synthetic resin net, is used. Further, the furnace material sheet 4 may be any material as long as it has water permeability, and for example, woven fabric, nonwoven fabric, knitted fabric, etc. are preferably used.

When pouring concrete using the formwork 1 to form a concrete wall, first pour concrete 9 in contact with the furnace material sheet 4 (Figure A), as shown in Figure 2.
. As a result, water generated from the concrete 9 flows through the furnace material sheet 4 and further through this into the buffer sheet 3, thereby being discharged. Therefore, according to this formwork 1, water generated from the concrete 9 can be efficiently and reliably discharged and removed to the outside, and as a result, blistering marks and fine irregularities caused by water bubbles occur on the concrete pouring surface. There is no such problem, and a smooth concrete pouring surface is formed.

Next, after the concrete 9 has solidified, the main body 2 of the formwork together with the buffer sheet 3 is removed by separating the buffer sheet 3 and the filter sheet 4, and the furnace material sheet 4 is left on the concrete pouring surface ( As a result, the concrete 9 is kept warm by this furnace material sheet 4, and the concrete is well kept warm and moistened (Fig. 6). in this case,
By spraying the heat insulating material 1o onto the furnace material sheet 4 remaining on the concrete placement surface, the heat retention and moisture effect can be further enhanced. After curing, the furnace material sheet 4 on the surface of the concrete is removed to complete the formation of the concrete wall (Figure D).

In this way, according to the formwork 1, after concrete is poured and hardened, the formwork 1 is removed by separating the furnace material sheet 4 and the buffer sheet 3, and the furnace material sheet 4 is placed on the concrete pouring surface. The sheet can be used to keep the concrete warm and moist, and therefore there is no need to perform heat insulation treatment such as placing a curing sheet on the concrete pouring surface or watering, and the work of forming concrete walls can be done easily. It can be simplified.

FIG. 3 shows another embodiment of the present invention, in which the formwork 1 has air sealed inside one surface of a water-impermeable plastic film 5 made of polyethylene, ethylene-vinyl acetate copolymer, etc. A buffer sheet 3 having a configuration in which a large number of elastic hollow disk-shaped protrusions 7 made of elastic plastic are integrally protruded in a staggered manner with a predetermined distance from each other, with an independent air chamber 6, is placed in the concrete of the formwork main body 2. It sticks to the installation side.

A furnace material sheet 4 is releasably laminated thereon, and a water conduction calendar 8 is provided between the furnace material sheet 4 and the water-impermeable plastic film 5.
The water from the concrete passes through the furnace material sheet 4 and further through the water guide M8 to be discharged to the outside.

An example of such a buffer sheet is Air Cap (trade name, manufactured by Ube Industries, Ltd.). In addition,
Since the other configurations and effects are the same as those of the above-described embodiment, their explanation will be omitted.

Further, the concrete pouring formwork and concrete wall forming method of the present invention are not limited to the above embodiments, and the configuration and shapes of the constituent elements may be changed as appropriate within the scope of the gist of the present invention. There is no problem.

As explained above, according to the formwork for concrete pouring of the present invention and the method of forming a concrete wall using the formwork, moisture generated from concrete during concrete pouring can be reliably removed from the outside. Therefore, it is possible to reliably prevent the formation of blisters and fine irregularities on the concrete placement surface, and thus the concrete surface can be placed cleanly. In addition, after concrete is cast and hardened using this formwork, the buffer sheet and filter sheet are separated and the formwork is removed, and the furnace material sheet is left on the concrete pouring surface. The sheet can be used to keep the concrete warm and moist, and by spraying the heat insulating material onto the furnace material sheet remaining on the surface of the concrete, it is possible to achieve good heat and moisture curing. In this case, since the furnace material sheet is interposed between the insulation material and the concrete pouring surface, the insulation material sticks to the concrete pouring surface and cannot be removed, unlike when the insulation material is sprayed directly onto the concrete pouring surface. It can be easily peeled off from the concrete pouring surface together with the furnace material sheet. As described above, according to the concrete casting formwork and concrete wall forming method of the present invention, there is no need to perform treatments such as separately applying a curing sheet or sprinkling water when curing concrete. , it is possible to simplify the work of forming concrete walls, etc.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of the formwork for concrete pouring of the present invention, and Figures 2 (A) to (D) are concrete walls constructed by pouring concrete using the formwork of the present invention. FIG. 3 is a sectional view showing another embodiment of the present invention. 1... Formwork for concrete pouring, 2... Formwork main body, 3... Buffer sheet, 4... Furnace material sheet, 9...
・Concrete, 10...insulation material. Figure 2 (A) (c)

Claims (1)

[Claims] 1. A water-conducting buffer sheet is fixed to the concrete casting side of the formwork, and a water-permeable filter sheet is removably laminated on the buffer sheet. Formwork for concrete pouring. 2. After pouring concrete using the concrete casting form according to claim 1, separating the buffer sheet and the filter sheet and removing the form, and leaving the filter sheet on the concrete pouring surface. A method for forming a concrete wall, which comprises curing concrete with heat and humidity using the filter sheet. 3. The method for forming a concrete wall according to claim 2, wherein the concrete is kept warm and moist by spraying a heat insulating material onto the filter sheet left on the surface of the concrete.