JPH0327164Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The invention relates to a concrete curing sheet for curing concrete.

Conventional technology Conventionally, curing of concrete was done by placing a plywood board on the surface of the poured concrete.
A method using concrete curing paper is known, as described in Publication No. 47323.

The method using plywood requires a large amount of plywood, is expensive, has a large volume and weight, requires a lot of work to handle, has poor workability, and the surface of the plywood comes into contact with the dry concrete surface. Since the exposed surface absorbs water, the plywood board will curve significantly, and in order to prevent this bending, a polyethylene sheet must be laid on the concrete surface before using the plywood board, which is a disadvantage that requires an extremely large amount of work. It had

In addition, the idea described in Japanese Utility Model Publication No. 56-47323 is made of kraft paper so as to have water supply properties, and the concrete surface is soaked with water. The area in contact with the surface supplies water while the outer surface dries, causing the sheet to become distorted or curved, which has the drawback of significantly impairing the curing effect of concrete. In addition, since the above-mentioned device forms many wrinkles, grooves are formed only in a certain direction on the surface that contacts the concrete, and ventilation intervals are created in the extending direction of the grooves. In parallel directions, no ventilation interval is created, resulting in the disadvantage that only a part of the concrete surface is insufficiently dried, or conversely, only a part of the concrete surface is dried.

Problems that the invention attempts to solve This invention aims to solve the problems mentioned above. It maintains the humidity of concrete without impregnating the sheet with water, and allows uniform curing of the entire surface of the concrete. The objective is to prevent distortion, curvature, etc. from occurring due to a significant difference in humidity between the surface in contact with the concrete and the outer surface.

Means for solving the problems In order to solve the problems mentioned above, the present invention
A plastic film is interposed between the laminated surfaces of multiple sheets of waterproof paper, and the plastic film is placed on the outer surface of the outer waterproof paper to form a sheet body, and this sheet body is heated with a thermal uneven embossing roll. The sheet body is formed by continuously forming concave and convex patterns at regular intervals and heat welding the plastic film to form an integral sheet body.

Function As mentioned above, this invention is made of plastic film and waterproof paper, so it can be extremely light in weight compared to plywood.
In addition to being easy to handle, the plastic film and waterproof paper prevent water from impregnating the sheet and retain the humidity of the concrete. Furthermore, the uneven molding creates a ventilation gap between the concrete surface and the sheet body, making it easier to handle the concrete. This prevents only a portion of the surface from drying poorly, or from drying only a portion of the surface, allowing for uniform curing of the entire surface of the concrete, and preventing formation of tortoise lines on the surface. .

In addition, unlike curing paper made from kraft paper, there is no need to impregnate it with water, and since a plastic film is placed on the outer surface of the processed paper to prevent water from entering, the contact surface to the concrete is There will be no distortion, curvature, etc. due to a significant difference in humidity between the material and the outer surface.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. 1 is a plurality of sheets of waterproof paper, and a heat-fusible plastic film 2 is interposed between the laminated surfaces, and a waterproof paper is placed on the outside. A plastic film 2 is placed on the outer surface of the processed paper 1 to form a sheet body 3. This sheet body 3 is continuously patterned with unevenness at regular intervals using a thermal uneven embossing roll (not shown) to continuously form uneven portions 4, and this uneven patterning allows the space between the waterproof paper 1 and the waterproof The plastic film 2 on the outer surface of the processed paper 1 is heat-welded to integrate the sheet body 3.

Effects of the invention As mentioned above, this invention is made of plastic film and waterproof paper, so it maintains the humidity of concrete without impregnating the sheet with water. A ventilation gap is created between the main bodies, which enables uniform curing of the entire concrete surface, and eliminates the formation of ridges on the surface.

In addition, unlike curing paper made from kraft paper, there is no need to impregnate it with water, and since a plastic film is placed on the outer surface of the processed paper to prevent water from entering, the contact surface to the concrete is There will be no distortion, curvature, etc. due to a significant difference in humidity between the material and the outer surface.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with FIG. 1 being a sectional view and FIG. 2 being a perspective view. 1...Waterproof paper, 2...Plastic film, 3...Sheet body, 4...Irregularities.

Claims (1)

[Scope of utility model registration request] A plastic film is interposed between the laminated surfaces of multiple sheets of waterproof paper, and the plastic film is placed on the outer surface of the outer waterproof paper to form a sheet body, and this sheet body is heated with a thermal uneven embossing roll. A concrete curing sheet characterized by continuously forming uneven patterns at regular intervals and heat-welding a plastic film to integrate the sheet body.