JP3165905B2 - Three-layer curing mat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curing mat which is laid on the upper surface of a concrete placed in a concrete work such as a civil engineering work or a construction work to cure the concrete. Is a three-layer curing mat having an air mat.

[0002]

2. Description of the Related Art Conventional concrete curing methods differ depending on the construction site. For mass concrete, however, a water-retaining mat having a single layer structure is laid on a concrete surface, or cured by directly impregnating or spraying water on the concrete surface. . However, in flooding or watering, it is difficult to flood or water the entire surface, and in order to completely inundate water, it is necessary to stop water at each corner, which takes time and requires concrete work. When the next work after installation and curing was performed, flooding curing was a bad condition for the next work. In addition, when a water-retention mat is laid, the water-retention capacity is determined only by the material of the mat, so that the water-retention mat is often dried unless water is frequently sprayed. Further, the water retention mat often shifts or winds up due to the influence of the wind, and it is difficult to maintain the cured state in the initial stage of laying for several days.

[0003] As a countermeasure against cracking of the temperature of concrete, there is a method in which several air mats having a great effect are laid one on another. However, it required relatively heavy labor, and even if it was weighed, the air mat was very light, so it was still affected by the wind and it was difficult to spread it evenly over the entire surface.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a concrete surface to be cured which is capable of being continuously and uniformly impregnated with water, has a good heat retaining property, and has an appropriate curing condition for concrete. Another object of the present invention is to provide a curing mat which can be manufactured without weight, and has good workability in laying.

[0005]

The three-layer curing mat according to the present invention comprises a hollow upper layer 2 filled with air, a hollow middle layer 3 for storing water, and a water-retaining property for infiltrating water from the middle layer 3. A three-layer structure consisting of the lower layer 4, the lower layer 4 is a water retention mat,
Middle layer 3 is a water mat that doubles as water storage, upper layer 2
Functions as an air mat having a heat insulating and heat insulating effect.

The middle layer 3 forms a hollow water storage space 9 by upper and lower impermeable soft plastic sheets 7, 8.
A number of convex portions 5 are formed by the lower soft plastic sheet 8.
Is formed on the lower surface, and is joined to the upper surface of the lower layer 3 by the convex portions 5 to form a gap 12 closed between the convex portions 5 on the upper surface of the lower layer 3. In addition, a plurality of micro holes 13 for infiltrating the water in the water storage space 9 into the lower layer 4 are provided.

In order to supply water to the middle layer 3,
A water inlet 10 for the middle layer 3 is provided. In order to be able to use a large number of three-layer curing mats laid like a block and use them side by side, a joint portion is connected to the outer surface of the middle layer 3 so as to be separably connected to the joint portion of the outer surface of the middle layer 3 of another three-layer curing mat. 17 may be provided.

[0008]

Next, embodiments of the present invention will be described in detail. FIG. 1 shows an example of a three-layer curing mat 1A according to the present invention.
1 shows a cross-sectional structure. The three-layer curing mat 1A includes a hollow upper layer 2 containing air and a hollow middle layer 3 for storing water.
And a lower layer 4 for retaining water that infiltrates the water from the middle layer 3. The upper surface of the middle layer 3 is flat, and a large number of hemispherical projections 5 are formed on the lower surface.

The lower layer 4 is a cloth mat having a high water retention property and has a uniform thickness, but has flexibility to conform along the upper surface of the concrete 6 to be cured.

The middle layer 3 has a hollow water storage space 9 formed by upper and lower impermeable soft plastic sheets 7 and 8, and one or a plurality of water inlets 1 protruding from the upper surface of the upper layer 2.
Water can be poured into the water storage space 9 from 0, and the three-layer curing mat 1A
After the water storage space 10 is emptied and brought to the site and placed on the concrete 6, the water inlet 10 can be closed by the detachable cap 11 after water injection.

The middle layer 3 is formed by molding a large number of hemispherical projections 5 with a soft plastic sheet 8 thereunder.
The protrusions 5 are joined to the upper surface of the lower layer 3 to form a gap 12 closed between the protrusions 5 on the upper surface of the lower layer 3. In addition, the three-layer curing mat 1A has a water storage space 9A.
As shown in FIG. 2, a plurality of micro holes 13 are provided in each convex portion 5 in order to allow the water inside to infiltrate the lower layer 4.

The upper layer 2 is a layer in which air is sealed in a hollow portion 16 formed by upper and lower airtight plastic sheets 14 and 15, and functions as a heat insulating layer having a low heat transfer coefficient.

The three-layer curing mat 1A is emptied of the water storage space 9 of the middle layer 3 and brought to the site, laid on the concrete 6, and then poured into the water storage space 9. The injected middle layer 3 serves as a weight to prevent the mat from being rolled up by wind or the like, and to infiltrate the lower layer 4 with water through the minute holes 13. The lower layer 4 infiltrated with water retains water uniformly on the entire area to give the concrete 6 an appropriate amount of water. The upper layer 2 enclosing the air has a heat retaining and heat insulating effect. The synergistic effect of the upper, middle, and lower three layers 2, 3, 4 provides the best environment for the hardening action of concrete as the initial curing of concrete.

Since there are various places in the concrete curing section, as shown in FIG. 3, a three-layer curing mat 1A is formed into a rectangular or square block having a predetermined size (in the case of a rectangle, for example, a width of 1.8 m and a length of 5 m). Produced in a form like
Desirably, a plurality of required blocks are connected and laid in accordance with the situation at the site as shown in FIG. In this case, one or a plurality of short pipe-shaped joints 17 which are detachably connected to other blocks are provided on the outer surface of the middle layer 3. When the blocks are connected to each other at the joint portion 17, as shown in FIG.
Communicate with each other to allow the water in the middle layer 3 to flow between the blocks.

In addition to being manufactured in advance as a block as described above, as shown in FIG. 6, if it is manufactured as a long object that can be wound into a roll so that it can be cut in a predetermined dimension unit along the cutting line 18, the cutting unit is Can be used as one unit of the three-layer curing mat 1A either in a state of being separated into one unit or in a state where a plurality of units are continuous.

[0016]

As described above, the three-layer curing mat of the present invention comprises a hollow upper layer containing air, a hollow middle layer for storing water, and a water-retaining lower layer for infiltrating water from the middle layer. In the three-layer structure, the lower layer functions as a water retention mat, the middle layer functions as a water mat that also functions as storage and weight, and the upper layer functions as an air mat that has heat insulation and heat insulation effects. In addition to being able to be continuously immersed in water, it has good heat retention and can be set to a proper curing condition for concrete. In addition, the weight is not required due to the water storage in the middle layer, and since the middle layer can be emptied and brought to the site, handling such as transportation is easy, and in addition, it is connected and laid in a block form, Since it can be laid as a long object from a roll to an appropriate length, the workability of laying is also very good.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an example of a three-layer curing mat of the present invention.

FIG. 2 is a view showing that, in the three-layer curing mat of the above, micropores for infiltrating water into a lower layer are provided in each convex portion of a middle layer.

FIG. 3 is a perspective view of a three-layer curing mat in a block form.

FIG. 4 is a plan view showing a connected state of a three-layer curing mat in a block form.

FIG. 5 is a partial cross-sectional view of the same.

FIG. 6 is a plan view of a three-layer curing mat which can be used as a long object by cutting it into units as needed.

[Explanation of symbols]

 1A Three-layer curing mat 2 Upper layer 3 Middle layer 4 Lower layer 6 Concrete 10 Water inlet 13 Micro hole 17 Joint

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-46-1186 (JP, A) JP-A-55-49460 (JP, A) Jpn. Field (Int. Cl. ⁷ , DB name) E04G 21/02 104

Claims (3)

(57) [Claims] 1. A hollow upper layer 2 in which air is sealed, a hollow middle layer 3 for storing water, and a water-retaining lower layer 4 infiltrating water from the middle layer 3, wherein the middle layer 3 is impermeable to water. Upper and lower soft plastic sheets 7
A hollow water storage space 9 is formed by 8 and a large number of convex portions 5 are formed on the lower surface by the lower soft plastic sheet 8. The convex portions 5 are joined to the upper surface of the lower layer 3, and the convex portions 5 and the convex portions 5 are formed. A gap 1 closed at the upper surface of the lower layer 3
2. A three-layer curing mat characterized in that a plurality of micropores 13 are formed in each of the projections 5 to allow water in the water storage space 9 to infiltrate into the lower layer 4. 2. The three-layer curing mat according to claim 1, wherein a water inlet is provided to the middle layer. 3. A joint portion 17 provided on the outer surface of the middle layer 3 so as to be separably connected to a joint portion on the outer surface of the middle layer 3 of another three-layer curing mat. The three-layer curing mat described.