Concrete curing mat

Abstract

To provide a concrete curing mat allowing a drying degree to be easily grasped.SOLUTION: A concrete curing mat has a substrate mat having at least one through-hole and a water absorption expansion member provided at the through-hole. The water absorption expansion member is provided to be exposed to a first face of the substrate mat and to a second face opposite to the first face. Water expansion rubber is used as the water absorption expansion member. Provision of the water absorption expansion member to penetrate the substrate mat and use of the concrete curing mat allow a drying degree to be easily grasped, to thereby appropriately cure the concrete without depletion.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] One embodiment of the present invention relates to a structure of a concrete curing mat used for curing concrete. [Background technology]

[0002] Concrete develops its strength through the hydration reaction between cement and water, which forms bonds with the aggregate. If the water content of concrete is insufficient due to wind or temperature during the hydration reaction, the reaction may not proceed sufficiently, and the expected strength may not be achieved, or plastic shrinkage cracks may occur. Therefore, it is important to keep the concrete moist after pouring in order to prevent water loss and to cure the concrete to promote hardening and strength development.

[0003] When curing concrete, a curing mat is used to cover the surface of the concrete. There are various types of concrete curing mats, and for example, a concrete curing mat has been disclosed in which a moistening material that swells by absorbing water is arranged on the concrete surface of the base material in order to increase adhesion to the concrete surface and retain moisture for a long period of time (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-081210 A Summary of the Invention [Problem to be solved by the invention]

[0005] The concrete curing mat disclosed in Patent Document 1 is said to be capable of curing concrete for a long period of time by having multiple moistening materials arranged on the concrete surface absorb moisture, expand, and deform to fill the gaps between adjacent materials. However, since the moistening materials are covered by the base mat, they are not visible from the outside, and there is a problem that the degree of dryness of the moistening materials cannot be easily determined from the outside.

[0006] In view of such problems, an object of one embodiment of the present invention is to provide a concrete curing mat that allows the degree of dryness to be easily grasped. [Means for solving the problem]

[0007] A concrete curing mat according to one embodiment of the present invention comprises a base mat having at least one through hole and a water-absorbing expansion member provided in the through hole, with the water-absorbing expansion member being exposed on a first surface of the base mat and a second surface opposite the first surface.

[0008] In one embodiment of the present invention, a gap may be formed between the water-absorbent expansion member and at least one of the through holes when the water-absorbent expansion member is dried, and a protrusion that can be caught by the base mat may be provided on the exposed parts of the first and second faces of the water-absorbent expansion member. The at least one through hole may be composed of a plurality of through holes, the plurality of through holes being provided at a distance from each other in the base mat, and a water-absorbent expansion member may be provided in each of the plurality of through holes.

[0009] In one embodiment of the present invention, the water-swelling member may be a water-swelling rubber, and the water-swelling member may have anisotropic expansion direction. Effect of the Invention

[0010] According to one embodiment of the present invention, a water-absorbing expansion member is provided so as to penetrate the base mat, making it possible to easily grasp the degree of dryness while curing the concrete, and enabling appropriate curing without depleting the moisture. [Brief description of the drawings]

[0011] [Figure 1] 1A and 1B are plan views of a concrete curing mat according to an embodiment of the present invention, where (A) shows a configuration according to a first embodiment, and (B) shows a configuration according to a second embodiment. [Diagram 2]1A and 1B show cross-sectional views of a concrete curing mat according to one embodiment of the present invention, in which (A) shows the cross-sectional structure corresponding to the section AB shown in FIG. 1A, and (B) shows the cross-sectional structure corresponding to the section CD shown in FIG. 1B. [Diagram 3] 1 shows a cross-sectional structure of a concrete curing mat according to one embodiment of the present invention, where (A) and (B) show a configuration according to a first embodiment, and (C) and (D) show a configuration according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the embodiments of the present invention will be described with reference to the drawings. However, the present invention can be implemented in many different aspects, and should not be interpreted as being limited to the description of the embodiments exemplified below. In the drawings, the width, thickness, shape, etc. of each part may be shown schematically compared to the actual aspect in order to make the explanation clearer, but it is merely an example and does not limit the interpretation of the present invention. In this specification and each figure, elements similar to those described above with respect to the previous figures may be given the same reference numerals (or reference numerals with A, B, or a, b, etc. added after the numerals) and detailed explanations may be omitted as appropriate. Furthermore, the letters "first" and "second" added to each element are convenient labels used to distinguish each element, and have no further meaning unless otherwise specified.

[0013] [First embodiment] FIG. 1(A) shows a plan view of a concrete curing mat 100A according to the first embodiment. The concrete curing mat 100A includes a base mat 102 and a water-absorbent expansion member 106a. The base mat 102 has a first surface 10 and a second surface 20 opposite the first surface 10, and is a mat that is spread and laid on a concrete surface. The base mat 102 has at least one through hole 104 that penetrates from the first surface 10 to the second surface 20. A water-absorbent expansion member 106a is provided in the at least one through hole 104. The water-absorbent expansion member 106a is provided so as to be exposed to the first surface 10 and the second surface 20 of the base mat 102.

[0014] It is preferable that a plurality of through holes 104 are provided in the base mat 102. It is preferable that the plurality of through holes 104 are arranged so as to be spaced apart from one another and to spread over the entire surface of the base mat 102. It is preferable that each of the plurality of through holes 104 is provided with a water-absorbing expansion member 106a as described above.

[0015] There is no limitation on the dimensions of the base mat 102, and the base mat may be cut to a size of 900 mm long and 1800 mm wide, or may be provided in a rolled state. There is no limitation on the size of the through holes 104, and the through holes 104 may be provided in an appropriate size as long as the strength of the base mat 102 is not impaired. For example, the through holes 104 are formed in a circular shape with a diameter of 20 mm to 40 mm. There is no particular limitation on the number of through holes 104 provided in the base mat 102 (in other words, the number of water-absorbing expansion members), but it is preferable that about 10 to 100 through holes 104 are provided per square meter.

[0016] There is no particular limitation on the material and structure of the base mat 102. The base mat 102 is preferably formed of a material capable of suppressing the evaporation of moisture, or has a structure capable of suppressing the evaporation of moisture. For example, the base mat 102 may be a mat in which a non-breathable sheet and a non-woven fabric or a woven fabric are laminated. The base mat 102 may be a mat in which a non-woven fabric or a woven fabric is stretched on the second surface 20 that faces the concrete, a non-breathable resin sheet is stretched on the first surface 10 that faces the outside, and a foamed resin sheet is sandwiched between the two.

[0017] The water-absorbing expansion member 106a is a member that expands in volume by absorbing water. For example, water-expanding rubber is used as the water-absorbing expansion member 106a. Water-expanding rubber is a composite of a rubber-based basic material and a water-absorbing material, and the degree of expansion can be appropriately adjusted by combining the type and amount of water-absorbing material, and it can be molded into any shape.

[0018] The cross-sectional structure between AB shown in Fig. 1(A) is shown in Fig. 2(A). Fig. 2(A) shows a partial cross-sectional structure of the concrete curing mat 100A when the water-absorbing expansion member 106a is dry. As described above, the base mat 102 is provided with a through hole 104, and the water-absorbing expansion member 106a is attached so as to be fitted into the through hole 104. The water-absorbing expansion member 106a is attached so as to pass through the through hole 104 and be exposed on the first surface 10 and the second surface 20 of the base mat 102.

[0019] As shown in Fig. 2(A), when the water-absorbing expansion member 106a is dry, it is preferable that there is a gap between the water-absorbing expansion member 106a and the through-hole 104. The water-absorbing expansion member 106a expands in volume when it absorbs water, so if there is no gap between the water-absorbing expansion member 106a and the through-hole 104 when it is dry, the expansion in volume when the water is absorbed may deform the base mat 102, making it impossible to lay it flat on the concrete surface. Therefore, by making a gap between the water-absorbing expansion member 106a and the through-hole 104 when it is dry, in anticipation of the expansion in volume of the water-absorbing expansion member 106a, problems associated with the expansion in volume can be eliminated.

[0020] The water-absorbing expansion member 106a may be provided so as to protrude from both the first surface 10 and the second surface 20 of the base mat 102, and may have a shape in which the protruding portion is provided with a eaves-like protruding portion 108. The protruding portion 108 protrudes outward from the through-hole 104, and therefore the water-absorbing expansion member 106a can be prevented from falling out of the base mat 102. In other words, the water-absorbing expansion member 106a has an H-shape (or an "E" shape) in cross section, and the portion that becomes the protruding portion 108 protrudes outward more than the through-hole 104, so that the water-absorbing expansion member 106a can be maintained in a state of being inserted into the through-hole 104 of the base mat 102.

[0021] 2(B) shows a partial cross-sectional structure of the concrete curing mat 100A when the water-absorbing expansion member 106a absorbs water and expands. When the water-absorbing expansion member 106a absorbs water, it expands in the same direction, and the water-absorbing expansion member 106a protrudes from the base mat 102, and the change can be confirmed in appearance.

[0022] 3(A) and (B) show a state in which a concrete curing mat 100A is laid on a concrete surface when curing a concrete member 200. Fig. 3(A) shows a state in which the water-absorption expansion member 106a is dry, and Fig. 3(B) shows a state in which the water-absorption expansion member 106a has expanded due to water absorption.

[0023] The water-absorption expansion member 106a is attached so as to penetrate from the first surface 10 to the second surface 20 of the base mat 102, and is therefore disposed so as to be in direct contact with the concrete surface when the concrete curing mat 100A is laid on the concrete member 200. The concrete curing mat 100A expands from a state in which the water-absorption expansion member 106a is dry as shown in Fig. 3(A) by spraying water and absorbing moisture contained in the concrete member 200, and becomes deformed so that the water-absorption expansion member 106a protrudes from the base mat 102 as shown in Fig. 3(B). After expanding by absorbing water, the water-absorption expansion member 106a contracts again when the concrete surface dries, and returns to its original size as shown in Fig. 3(A).

[0024] In the concrete curing mat 100A, the shape of the water-absorbent expansion member 106a changes depending on the wet state of the concrete member 200, and this change is visible in the exterior, so that the degree of dryness of the area to be wet cured can be grasped visually. By arranging the water-absorbent expansion members 106a at intervals all over the surface of the base mat 102, even if the area to be wet cured of the concrete member 200 covers a wide area, unevenness in the degree of dryness can be visually confirmed. This allows the contractor to grasp the areas that require watering, etc., and to take appropriate measures.

[0025] [Second embodiment] 1(B) shows a plan view of a concrete curing mat 100B according to the second embodiment. The concrete curing mat 100B according to the second embodiment has a different characteristic of the water-absorbing expansion member 106b from that shown in the first embodiment. In the following description, the differences from the first embodiment will be mainly described, and overlapping descriptions will be omitted as appropriate.

[0026] The concrete curing mat 100B includes a base mat 102 and a water-absorbing expansion member 106b. The base mat 102 is provided with a through hole 104, and the water-absorbing expansion member 106b is attached so as to be exposed to the through hole 104.

[0027] The water-absorbing expansion member 106b in the second embodiment has anisotropy in the expansion direction when it absorbs water. That is, while the water-absorbing expansion member 106a in the first embodiment has no anisotropy in the expansion direction and expands in one direction, the water-absorbing expansion member 106b in the second embodiment has a property that the expansion rate in a specific direction is greater than the expansion rate in other directions.

[0028] FIG. 2(C) shows the cross-sectional structure between C and D shown in FIG. 1(B). FIG. 2(C) shows a partial cross-sectional structure of the concrete curing mat 100B when the water-absorption expansion member 102b is dry. The water-absorption expansion member 106b is attached so as to fit into the through-hole 104 provided in the base mat 102. At this time, the water-absorption expansion member 106b may be fitted into the through-hole 104 without any gap. The water-absorption expansion member 106b may have a certain amount of gap as in the first embodiment. In this case, the water-absorption expansion member 106b may be bonded to the base mat 102 with an adhesive or the like. The shape of the water-absorption expansion member 104b is arbitrary, but it may have a shape that is inserted into the through-hole 104 from the second surface 20 of the base mat 102 and has an upper part that is approximately flush with the first surface 10 when dry.

[0029] 2(D) shows a partial cross-sectional structure of the concrete curing mat 100B when the water-absorbing expansion member 106b absorbs water and expands. When the water-absorbing expansion member 106b absorbs water, it expands mainly in one direction (the thickness direction of the base mat 102) and deforms so that the upper part of the water-absorbing expansion member 106b protrudes from the first surface 10 of the base mat 102.

[0030] 3(C) and (D) show the state in which the concrete curing mat 100B is laid on the concrete surface when curing the concrete member 200. Fig. 3(C) shows the state in which the water-absorption expansion member 106b is dry, and Fig. 3(D) shows the state in which the water-absorption expansion member 106b has expanded due to water absorption.

[0031] Water-absorbing expansion member 106b expands in one direction from a dry state as shown in Fig. 3(C) when water is sprayed onto the concrete surface or when it absorbs moisture contained in concrete member 200, and deforms so that its upper portion protrudes from base mat 102 as shown in Fig. 3(D). After expanding by absorbing water, water-absorbing expansion member 106b contracts again when the concrete surface dries, and returns to its original size as shown in Fig. 3(C).

[0032] In the concrete curing mat 100B, the shape of the water-absorbent expansion members 106b deforms in one direction depending on the wet state of the concrete member 200, and this deformation appears on the outside as a shape protruding from the base mat 102, so that the degree of dryness of the area to be wet cured can be grasped visually. By arranging the water-absorbent expansion members 106b at intervals all over the surface of the base mat 102, even if the area to be wet cured of the concrete member 200 covers a wide area, it is possible to visually confirm the unevenness of the degree of dryness. This allows the contractor to grasp the areas that require watering, etc., and to take appropriate measures. [Explanation of symbols]

[0033] 100A, 100B: concrete curing mat, 102: base mat, 104: through hole, 106a, 106b: water-absorbing expansion member, 108: protrusion, 200: concrete member

Claims

1. a substrate mat having at least one through hole; A water-absorbing expansion member provided in the at least one through hole; having A concrete curing mat, characterized in that the water-absorbing expansion member is exposed on a first surface and a second surface opposite to the first surface of the base mat.

2. 2. The concrete curing mat according to claim 1, wherein a gap is formed between the water-absorption expansion member and the at least one through hole when the water-absorption expansion member is dried.

3. 3. The concrete curing mat according to claim 1, wherein the exposed portions of the first surface and the second surface of the water-absorbing expansion member are provided with protrusions for being caught by the base mat.

4. the at least one through hole comprises a plurality of through holes; The plurality of through holes are provided at intervals in the base mat, 4. The concrete curing mat according to claim 1, wherein the water-absorbing expansion member is provided in each of the plurality of through holes.

5. 5. The concrete curing mat according to claim 1, wherein the water-absorbing expansion member is a water-expanding rubber.

6. The concrete curing mat according to claim 1 , wherein the expansion direction of the water-absorbent expansion member is anisotropic.

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