JP4437072B2 - Concrete wet curing apparatus and method - Google Patents

Description

  The present invention relates to an apparatus and a method for continuously applying wet curing to a concrete structure such as a foundation of a building to prevent cracks and to surely develop the design strength of concrete.

  When manufacturing concrete structures, water is required in the process of pouring ready-mixed concrete into the formwork and then hardening by the hydration reaction of the cement. Need to replenish water for about 7 days).

  Such water replenishment means include sprinkling water on the surface of the placed concrete, covering it with water, placing a sponge soaked in water, and a sheet to prevent water from evaporating. However, it was difficult to carry out the work continuously over a considerable period of time.

  In summer, it is necessary to block the direct sunlight and spray water frequently to lower the temperature.In winter, it is necessary to keep the temperature so that it does not decrease excessively. Management is also necessary.

  Moreover, as a method for automatically supplying water to the surface of the placed concrete for wet curing, there is an invention disclosed in Japanese Patent Application Laid-Open No. 2002-70309. In this method, a watering pipe is provided along the surface of the placed concrete, and water is supplied to the watering pipe while controlling the time.

However, this method merely automatically and regularly sprays the concrete surface, and during summer daytime, the water may evaporate during the watering, and in winter nighttime etc. There is a risk of freezing.
JP 2002-70309 A

  The present invention has been made in view of such circumstances, and constantly and constantly supplements the placed concrete with water to maintain a wet state, control the temperature of the supplied water, and circulate water at an appropriate temperature. The purpose is to replenish water.

  Thus, the concrete wet curing apparatus according to the present invention has a rod-like sponge having open cells, which is respectively placed along the surfaces of a plurality of placed concretes having steps, and spans between the rod-like sponges. And a water replenishing tank installed on the upper part of the water absorbent sheet on the uppermost concrete and having a small hole formed on the lower surface, and water is supplied from the water replenishing tank to the water absorbing sheet. It is characterized by having shown.

  The concrete wet curing device of the present invention preferably includes a water supply tank having a water supply means having a water level adjusting function, and a circulation device for circulating water between the water supply tank and the supplementary water tank.

  Further, in this apparatus, the replenishment tanks respectively provided on the plurality of concrete that are substantially in the same plane are connected to each other by a connecting pipe, and a circulation path is formed from the water supply tank through the plurality of replenishment tanks. preferable.

  Moreover, in the apparatus of this invention, it is preferable to provide an adjustment valve in the small hole of the said water replenishment tank. Furthermore, in the apparatus of this invention, it is preferable to cover the outer side of the said concrete, sponges, and a water replenishment tank with an insulating material. Further, it is desirable that the water supply tank is provided with a temperature adjusting means for controlling the temperature of water therein. Moreover, it is preferable that the water supply tank is provided at a position higher than the water replenishment tank.

  Next, in the concrete wet curing method of the present invention, rod-like sponges each having open cells are placed on the surfaces of a plurality of placed concretes having steps, and a water-absorbent sheet is placed between the rod-like sponges. A water replenishing tank having a small hole in the lower surface is installed on the upper part of the water absorbent sheet on the uppermost concrete, water is supplied from the water replenishing tank to the water absorbent sheet through the small hole, and the water is absorbed in the water absorbing sheet. It supplies to the surface of the concrete of each step through an adhesive sheet and a stick-like sponge.

  In the method of the present invention, it is preferable that water whose temperature is adjusted from a water supply tank is circulated to the water replenishing tank, and the water is supplied from each water replenishing tank to the concrete surface through a water-absorbent sheet and a rod-like sponge below it.

  Further, in the concrete wet curing method of the present invention, replenishment tanks respectively provided on a plurality of concrete that are substantially coplanar are connected to each other by connecting pipes, and a circulation path is connected from the water supply tank through the plurality of replenishment tanks. It is preferable that the water supplied through the circulation path is supplied from the water replenishing tanks to the surface of the concrete through the water-absorbent sheet and the rod-like sponge below it.

  According to the present invention, water can be supplied from a water retention tank provided at the uppermost stage through a water absorbent sheet and a rod-like sponge to concrete at each stage and supplied from a water supply tank to a plurality of concrete having steps. By circulating the water in the replenishing tank, water is constantly supplied from the replenishing tank to the concrete via a stick-like sponge, and the temperature of the concrete is controlled even in summer and winter by controlling the temperature of the circulating water. It can be controlled, and the placed concrete can be wet-cured to ensure that its design strength is expressed.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which the present invention is applied to concrete placed as a foundation of a building, and FIG. 2 is an enlarged cross-sectional view showing a part thereof.

  In the drawing, 1 is concrete placed as a foundation of a building, which is poured by pouring ready-mixed concrete into a mold 2, and is composed of a base portion 3 and an upright portion 4 protruding in the center thereof. As a whole, the cross section is formed in a substantially convex shape. In FIG. 1, the mold 2 is not shown.

  FIG. 1 shows a foundation A of the concrete 1, and an outer peripheral portion Aa formed by surrounding the outer periphery in a substantially rectangular shape, a transverse portion Ab formed across the central portion of the outer peripheral portion Aa, and an outer periphery It consists of a connection part Ac that connects the part Aa and the crossing part Ab, and a building is constructed on top of the foundation A.

  Then, stick-like sponges 5 a and 5 b are placed along the path of the foundation A on the upper surfaces of the standing part 4 and the base part 3 in the concrete 1. The rod-like sponges 5a and 5b are foams of synthetic resin such as polyurethane having open cells, and have water absorption.

  Then, a water absorbent sheet 6 is hung on a rod-like sponge 5 a placed on the upper end of the upright portion 4, and both side portions of the water absorbent sheet 6 hang down on both sides of the upright portion 4, and the rod-like sponge on the base portion 3. It is also stretched over 5b. As the water absorbent sheet 6, a sheet-like sponge or towel cloth is suitable.

  A rod-like sponge 7 is placed on the water-absorbing sheet 6 on the standing portion 4, and this rod-like sponge 7 is also made of a synthetic resin such as polyurethane having open cells similar to the rod-like sponges 5a and 5b. It is made of foam and has water absorption.

  A water replenishment tank 8 is placed on the rod-like sponge 7. The water replenishment tank 8 is a metal or plastic container, and a small hole 10 is formed in the lower surface of the main body 9 so that the water 11 in the water leaks little by little. In addition, you may install the water replenishment tank 8 directly on the water absorbing sheet 6, without providing the rod-shaped sponge 7. FIG.

  A rod-like sponge 5a, a water-absorbing sheet 6 and a rod-like sponge 7 are placed on the upright portions 4 of the portions Aa, Ab and Ac of the foundation A, respectively. The tank 8 is connected by a connecting pipe 12.

  A water supply tank 13 is supplied with water 11 from an external water source (for example, a water tap) through a supply pipe 14 serving as water supply means, and the water level adjusting means (not shown) supplies water 11 in the water supply tank 13. The amount is kept constant, and the temperature of the water 11 in the water supply tank 13 is controlled by a temperature adjusting means (not shown) as required.

  The water supply tank 13 is connected to some of the water replenishing tanks 8 through a water supply pipe 16 via a circulation device 15, and a circulation path for circulating water 11 from the water supply tank 13 through all the water replenishing tanks 8 is formed.

  17 is a heat insulating material that covers the concrete 1, sponges 5, 6, and 7 and the water replenishing tank 8, and the temperature of the concrete 1 and the water 11 supplied to the concrete 1 fluctuates excessively particularly in summer and winter. To prevent.

  FIG. 3 shows another example of the apparatus according to the present invention. The refill water tank 8 is hung from the upper portion of the heat insulating material 17 by a hanging strap 18, and the small hole 10 of the refill water tank 8 is adjusted. A valve 19 is attached so that the amount of water supplied from the replenishing tank 8 to the rod-like sponge 7 can be adjusted by the adjusting valve 19.

  Thus, in the present invention, a fixed amount of water 11 is supplied from the supply pipe 14 to the water supply tank 13, the temperature of the water 11 is adjusted by the temperature adjusting means, and the water 11 is supplied to the water supply tank 8 by the circulation device 15. Supply and circulate.

  Water 11 in the water replenishing tank 8 leaks downward from the small hole 10 and penetrates into the rod-like sponge 7 and further penetrates into the sheet-like sponge 6. Part of the water 11 that has permeated into the sheet-like sponge 6 further penetrates into the rod-like sponge 5 a on the upright part 4, and the other part passes through the part that hangs down on both sides of the upright part 4 and sticks on the base part 3. Water 11 is supplied to the concrete 1 in contact therewith from the rod-like sponges 5a and 5b, and the concrete 1 is kept in a wet state.

  In summer and winter, the temperature of the water 11 supplied to the replenishing tank 8 is adjusted in the water supply tank 13, and the temperature of the heat insulating material 17 is controlled by covering the periphery with the heat insulating material 17. 11 is maintained at a temperature of 11, and the concrete 1 can always be wet-cured in an optimum state.

  In the above description, the concrete 1 has a substantially convex cross section, and is described as curing a concrete surface with a step. However, even when curing a concrete surface on a single plane. For example, the sheet-like sponge 6 and the rod-like sponge 7 are not necessary, and the water replenishing tank 8 can be directly placed on the rod-like sponge 5.

  In addition, when the concrete 1 has a plurality of stages having different heights of three or more stages, a rod-like sponge 5 is placed on the concrete 1 of each of the steps, and a sheet-like sponge is placed on the rod-like sponge 5. 6 and the water replenishment tank 8 is provided only on the uppermost concrete 1, the water 11 can be supplied to the lower concrete 1 via the sheet-like sponge 6.

  Further, by installing the water supply tank 13 at a position higher than the water replenishing tank 8, even when the function of the circulation device 15 is stopped due to a power failure or the like, at least water supply to the water replenishing tank 8 is stopped by natural flow. The minimum function of supplying water to the concrete 1 can be ensured.

  In the above description, the case of curing the concrete 1 as the foundation A of the building has been described, but the present invention is not limited to this application, and can be widely applied to the production of various concrete products. it can.

The perspective view which shows the state which applies this invention to the foundation of a building 1 is an enlarged cross-sectional view showing a part of FIG. Partial cross-sectional view showing another example of the apparatus of the present invention

Explanation of symbols

1 Concrete 5 Bar Sponge 6 Sheet Sponge 7 Bar Sponge 8 Water Replenishment Tank 10 Small Hole 11 Water 12 Connection Pipe 13 Water Supply Tank 14 Supply Pipe (Water Supply Means)
15 Circulating device 17 Heat insulation material 19 Control valve

Claims (10)

Hang between the stick-like sponges (5a, 5b) having open cells and the stick-like sponges (5a, 5b) respectively placed along the surface of the plurality of placed concrete (1) having steps. A passed water-absorbing sheet (6), and a water replenishing tank (8) provided on the upper surface of the water-absorbing sheet (6) on the uppermost concrete (1) and having a small hole (10) formed in the lower surface thereof. A concrete wet curing device characterized in that water is supplied from the water replenishing tank (8) to the water absorbent sheet (6). A water supply tank (13) having a water supply means (14) having a water level adjustment function, and a circulation device (15) for circulating water (11) between the water supply tank (13) and the water replenishment tank (8) The concrete wet curing device according to claim 1, characterized by comprising: The replenishing tanks (8) respectively provided on the plurality of concrete (1) on the same plane are connected to each other by the connecting pipe (12), and the plurality of replenishing tanks (8 The concrete wet curing apparatus according to claim 2 , wherein a circulation path is formed.   The concrete wet curing device according to claim 1, 2 or 3, characterized in that an adjustment valve (19) is provided in the small hole (10) of the water replenishing tank (8).   The outside of the concrete (1), sponges (5, 6, 7) and the water replenishment tank (8) are covered with a heat insulating material (17), characterized in that Concrete wet curing equipment The concrete wet curing device according to claim 2, 3, 4, or 5 , characterized in that the water supply tank (13) is provided with temperature adjusting means for controlling the temperature of the water (11) therein. The concrete wet curing device according to claim 2, 3, 4, 5, or 6 , wherein the water supply tank (13) is provided at a position higher than the water replenishment tank (8). Rod-like sponges (5a, 5b) each having open cells are placed on the surface of a plurality of placed concrete (1) having steps, and a water-absorbing sheet (between the rod-like sponges (5a, 5b)) ( 6), a water replenishing tank (8) having a small hole (10) in the lower surface is installed on the upper part of the water absorbent sheet (6) on the uppermost concrete (1), and the water replenishing tank (8) Water (11) is supplied to the water absorbent sheet (6) from the small holes (10) through the small holes (10), and the water (11) is passed through the water absorbent sheet (6) and the rod-like sponges (5a, 5b) in each stage. Concrete wet curing method, characterized in that it is supplied to the surface of concrete (1) Water (11) whose temperature has been adjusted is circulated from the water supply tank (13) to the water replenishing tank (8). The concrete wet curing method according to claim 8, wherein the concrete is supplied to the surface of the concrete (1) through (5a, 5b). The replenishing tanks (8) respectively provided on the plurality of concrete (1) on the same plane are connected to each other by the connecting pipe (12), and the plurality of replenishing tanks (8) are connected to the water supply tank (13). ) Through which the water (11) supplied through the circulation path is supplied from each replenishment tank (8) through the lower water absorbent sheet (6) and the rod-like sponge (5a, 5b) of the concrete (1). The concrete wet curing method according to claim 9, wherein the concrete wet curing method is supplied to a surface.

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