JPWO2018021230A1 - Mesh and concrete peeling prevention material - Google Patents

Abstract

Provided is a mesh excellent in punching characteristics, which is an index of concrete's anti-slip characteristics. A mesh fabric 1 constituted by a warp 2 and a weft 3 and having a glass composition of 12% by mass or more of ZrO 2 and 10% by mass of R 2 O (R is at least one selected from Li, Na and K) A mesh fabric 1 comprising: a glass fiber bundle, and a synthetic fiber bundle having a breaking elongation of 4% to 35% as measured according to JIS R 3420 (2013).

Description

  The present invention relates to a mesh and a concrete anti-slip material provided with the mesh.

  Heretofore, as a measure to prevent spallation in concrete structures such as buildings and tunnels, a method of attaching a reinforcing material to the surface of a concrete structure is known. As the reinforcing material, a structure in which a mesh fabric is embedded in a steel plate, fiber reinforced plastic, cement mortar, resin or the like is used.

  For example, Patent Document 1 below discloses a reinforcing fabric used for repairing or reinforcing a concrete surface. The reinforcing fabric is a mesh fabric in which warps and wefts made of reinforcing fiber yarns such as carbon fibers are arranged in a mesh. Further, between the reinforcing fiber yarns, 1 to 3 warp auxiliary yarns and weft auxiliary yarns made of glass yarn are arranged. In Patent Document 1, the reinforcing fiber yarn and the auxiliary yarn as described above are integrated in a plain weave structure.

  Further, Patent Document 2 below discloses a mesh fabric having a main fiber bundle composed of a plurality of strands and an auxiliary fiber bundle entangled with the main fiber bundle. In patent document 2, the glass fiber bundle is used as a main fiber bundle. In addition, cotton yarn is used as an auxiliary fiber bundle.

Patent No. 4228497 JP 2007-291590 A

  However, in the mesh fabrics of Patent Document 1 and Patent Document 2, both the load (core breaking load) and displacement (push-out load after displacement) in the push-out test, which is an index of concrete's anti-peeling properties, are sufficiently enhanced. There was no such thing. If both of the load and displacement in the punching test are not high, a small load may cause a crack or a cracked concrete piece to fall immediately. Therefore, when it was used as an anti-peeling material for concrete, there was a case where the peeling of concrete could not be sufficiently prevented.

  An object of the present invention is to provide a mesh and a concrete material for preventing peeling of concrete using the mesh, which is excellent in punching characteristics which is an index of the characteristic of preventing peeling of concrete.

The mesh according to the present invention is a mesh composed of a plurality of warps and a plurality of wefts, and has a glass composition of 12% by mass or more of ZrO ₂ and R ₂ O (R is Li, Na and K A glass fiber bundle containing 10% by mass or more of at least one selected from: and a breaking elongation of 4% or more and 35% or less measured according to JIS R 3420 (2013) And a fiber bundle.

  In the mesh according to the present invention, the synthetic fiber bundle is preferably a vinylon fiber bundle.

The mesh according to the present invention preferably has a basis weight of 100 g / m ² or more and 450 g / m ² or less.

In the mesh according to the present invention, the basis weight of the glass fiber bundle is 50 g / m ² or more and 250 g / m ² or less, and the basis weight of the synthetic fiber bundle is 30 g / m ² or more and 200 g / m ² or less Is preferred.

  In the mesh according to the present invention, the mass ratio of the synthetic fiber bundle in the mesh is preferably 10% by mass or more and 70% by mass or less.

  In the mesh according to the present invention, the volume ratio of the synthetic fiber bundle in the mesh is preferably 20% or more and 80% or less.

  As for the mesh which concerns on this invention, it is preferable that the mass ratio of the said glass fiber bundle in the said mesh is 30 to 90 mass%.

  In the mesh according to the present invention, the volume ratio of the glass fiber bundle in the mesh is preferably 20% or more and 80% or less.

  The mesh according to the present invention preferably has a tensile strength of 200 N / 25 mm or more in each of the direction along the warp and the direction along the weft.

  The mesh according to the present invention is preferably made of a twill weave fabric.

  In the mesh according to the present invention, it is preferable that at least one of the warp and the weft be constituted by both the glass fiber bundle and the synthetic fiber bundle.

  It is preferable that the mesh which concerns on this invention is used for a concrete peeling prevention material.

  The concrete anti-slip material according to the invention comprises a matrix and a mesh constructed according to the invention.

  ADVANTAGE OF THE INVENTION According to this invention, the mesh which is excellent in the punching property used as the parameter | index of the falling-off prevention characteristic of concrete can be provided.

FIG. 1 is a schematic plan view showing a mesh fabric according to a first embodiment of the present invention. FIG. 2 is a schematic plan view showing a mesh fabric according to a second embodiment of the present invention. FIG. 3 is a schematic cross-sectional view showing a concrete peeling-off preventing material according to an embodiment of the present invention. FIG. 4 is a schematic plan view showing the mesh fabric obtained in Examples 1 to 12 and Comparative Example 1. FIG. 5 is a schematic plan view showing the mesh woven fabric obtained in Examples 13-17. FIG. 6 is a schematic plan view showing the mesh woven fabric obtained in Examples 18 and 19. FIG. 7 is a schematic plan view showing the mesh fabric obtained in Example 20. FIG. 8 is a schematic plan view showing the mesh fabric obtained in Examples 21 and 22. FIG. 9 is a schematic plan view showing the mesh woven fabric obtained in Examples 23 and 24.

  Hereinafter, preferred embodiments will be described. However, the following embodiments are merely illustrative, and the present invention is not limited to the following embodiments. In each drawing, members having substantially the same functions may be referred to by the same reference numerals.

[mesh]
First Embodiment
FIG. 1 is a schematic plan view of a mesh according to a first embodiment of the present invention.

  As shown in FIG. 1, the mesh according to the first embodiment is a mesh in which a plurality of warps and a plurality of wefts are woven, so-called mesh fabric 1. The mesh fabric 1 is composed of a plurality of warps 2 and a plurality of wefts 3. Each warp yarn 2 has a first strand 2a and a second strand 2b. In the mesh fabric 1, the first strand 2 a and the second strand 2 b are twisted together so that a plurality of weft threads 3 are interwoven therebetween. That is, the mesh fabric 1 is a fabric in which the first strand 2 a and the second strand 2 b constituting the warp 2 and the weft 3 are entangled.

  In the present embodiment, the first strands 2a of the warp 2 are glass fiber bundles. The one glass fiber bundle is composed of a coating and a plurality of glass fiber monofilaments. The surface of the glass fiber monofilament is covered by a coating. The coating is also present between the glass fiber monofilaments and on the surface of the glass fiber bundle, and also plays a role of bundling a plurality of glass fiber monofilaments. On the other hand, the second strand 2b of the warp 2 is made of one or more synthetic fiber bundles. The one synthetic fiber bundle is composed of a plurality of synthetic fiber monofilaments.

  In the present embodiment, each of the weft yarns 3 is preferably made of a composite yarn in which a glass fiber bundle and a synthetic fiber bundle are twisted. The weft yarn 3 may not be a double-twisted yarn, and may be a non-twist yarn in which a glass fiber bundle and a synthetic fiber bundle are bundled without being twisted. Two types of glass fiber bundles and synthetic fiber bundles may be prepared, and each fiber bundle may be a woven fabric alone. For example, when glass fiber bundles and synthetic fiber bundles are alternately arranged as a plurality of wefts 3 in the direction in which the warp 2 extends, the arrangement distribution of the glass fiber bundles and the synthetic fiber bundles in the mesh fabric 1 becomes uniform. Because it is preferable. In addition, all of the plurality of weft yarns 3 may be composed of only the glass fiber bundle or only the synthetic fiber bundle.

The above glass fiber bundle contains, as a glass composition, 12% by mass or more of ZrO ₂ and 10% by mass or more of R ₂ O (R is at least one selected from Li, Na and K). Therefore, the mesh fabric 1 is excellent in alkali resistance and flame retardancy.

  Moreover, the above-mentioned synthetic fiber bundle has a breaking elongation of 4% or more and 35% or less measured in accordance with JIS R 3420 (2013). When the elongation at break of the synthetic fiber bundle is too small, the synthetic fiber bundle is broken at a displacement amount similar to that of the glass fiber bundle in the punching test which is an index of the anti-slip property of concrete, so sufficient displacement is obtained I can not do it. Therefore, the broken concrete pieces will fall immediately. On the other hand, when the breaking elongation of the synthetic fiber bundle is too large, the tensile strength of the synthetic fiber bundle is reduced, so that a sufficient load can not be obtained in the punching test. Therefore, a crack will occur with a small load.

  The mesh fabric 1 of the present embodiment is provided with the glass fiber bundle having the above specific composition and the synthetic fiber bundle having the above specified breaking elongation, so that a punching test as an indicator of the anti-slip property of concrete High load and high displacement can be obtained. This is because the load can be maintained without breakage of the synthetic fiber bundle even after breakage of the glass fiber bundle having a low breaking elongation in the punching test. Further, when the synthetic fiber bundle is stretched, it has an effect of peeling the glass fiber bundle from the matrix, and even a glass fiber bundle having a small tensile elongation can bear a load without being further cut. In this case, when any of the plurality of warp yarns 2 or the plurality of weft yarns 3 is composed of a glass fiber bundle and a synthetic fiber bundle, this effect is more remarkably observed.

  As described above, since the mesh fabric 1 is excellent in punching performance (characteristics) which is an index of the anti-slip property of concrete, the reinforcing effect of the concrete structure can be enhanced, which is suitable for the anti-slough application of concrete It can be used.

In the present invention, the basis weight of the mesh fabric 1 is not particularly limited, but is preferably 100 g / m ² or more and 450 g / m ² or less. The load and displacement in a punching test can be further enlarged as the fabric weight of mesh textile fabric 1 is more than the above-mentioned minimum, and the reinforcement effect to a concrete structure can be heightened further. On the other hand, when the fabric weight of the mesh fabric 1 is not more than the above upper limit, the mesh fabric 1 can be more easily integrated with the resin matrix constituting the concrete peeling prevention material described later, and the reinforcing effect on the concrete structure can be further enhanced.

The basis weight of the mesh fabric 1 is more preferably 150 g / m ² or more, and more preferably 350 g / m ² or less, in view of cost and in order to further enhance the reinforcing effect to the concrete structure.

The basis weight of the glass fiber bundle constituting the mesh fabric 1 is not particularly limited, but is preferably 50 g / m ² or more and 250 g / m ² or less. When the fabric weight of the glass fiber bundle is above the above lower limit, the load in the punching test can be further increased, and the reinforcing effect on the concrete structure can be further enhanced. On the other hand, when the basis weight of the glass fiber bundle is below the above-mentioned upper limit, breakage of the glass fiber bundle is less likely to damage the synthetic fiber bundle, and the displacement in the punching test can be further enhanced. From the viewpoint of further enhancing the punching characteristics, the basis weight of the glass fiber bundle is preferably 80 g / m ² or more, and preferably 200 g / m ² or less.

Moreover, the fabric weight of the synthetic fiber bundle which comprises the mesh fabric 1 is although it does not specifically limit, It is preferable that they are 30 g / m < ² > or more and 200 g / m < ² > or less. When the fabric weight of the synthetic fiber bundle is above the above lower limit, the displacement in the punching test can be further increased. On the other hand, below the above-mentioned upper limit, the load in the punching test can be further increased. From the viewpoint of further improving the punching characteristics, the basis weight of the synthetic fiber bundle is preferably 50 g / m ² or more, preferably 180 g / m ² or less.

  In addition, the fabric weight of a glass fiber bundle is the value calculated | required by deducting mass of components other than the glass fiber bundle which comprises mesh fabric 1, for example, a synthetic fiber bundle, coating resin etc. which are mentioned later. The basis weight of the synthetic fiber bundle is a value obtained by subtracting the mass of components other than the synthetic fiber bundle constituting the mesh fabric 1, for example, a glass fiber bundle and a coating resin described later. When the mesh fabric 1 is composed only of the glass fiber bundle and the synthetic fiber bundle, the basis weight of the mesh fabric 1 is the sum of the fiber basis weight of the glass fiber bundle, the fabric basis weight of the synthetic fiber bundle and the covering resin.

  From the viewpoint of further improving the punching characteristics, the mass ratio of the synthetic fiber bundle in the mesh fabric 1 is preferably 10% by mass or more and 70% by mass or less. Moreover, it is preferable that the volume ratio of the synthetic fiber bundle in the mesh fabric 1 is 20 volume% or more and 80 volume% or less. In addition, the mass ratio and volume ratio of a synthetic fiber bundle mean the ratio when making the whole mesh fabric 1 100 mass% or 100 volume%, respectively.

  From the viewpoint of further improving the punching characteristics, the mass ratio of the glass fiber bundle in the mesh fabric 1 is preferably 30% by mass or more and 90% by mass or less. Moreover, it is preferable that the volume ratio of the glass fiber bundle in the mesh fabric 1 is 20% or more and 80% or less. In addition, the mass ratio and volume ratio of a glass fiber bundle mean the ratio when making the whole mesh fabric 1 100 mass% or 100%, respectively.

  Moreover, even after reinforcement, the distance between adjacent warps 2 and the distance between adjacent wefts 3 are 2 to 10 mm from the viewpoint of confirming the concrete structure and from the viewpoint of uniformly impregnating the matrix resin described later. Is preferred.

  Further, from the viewpoint of further increasing the load in the punching test and further enhancing the punching characteristics of the mesh fabric 1, the tensile strength in the direction along the warp 2 and the direction along the weft 3 is respectively 200 N / 25 mm or more Is preferred. The tensile strength can be measured in accordance with JIS L1096 (2010).

  In the mesh fabric 1 of the first embodiment, the plurality of warp yarns 2 and the plurality of weft yarns 3 are respectively formed of a glass fiber bundle and a synthetic fiber bundle. However, in the present invention, at least one of the plurality of warps 2 and the plurality of wefts 3 may include the glass fiber bundle. In addition, at least one of the warp 2 and the weft 3 may include a synthetic fiber bundle. In addition, at least one of the plurality of warp yarns 2 and the plurality of weft yarns 3 may contain the glass fiber bundle. In addition, at least one of the plurality of warp yarns 2 and the plurality of weft yarns 3 may contain the synthetic fiber bundle. That is, the mesh fabric 1 may be provided with the synthetic fiber bundle and the glass fiber bundle.

  For example, both the first strand 2a and the second strand 2b may be glass fiber bundles. In that case, the weft yarn 3 may contain at least a synthetic fiber bundle. Alternatively, both of the first strand 2a and the second strand 2b may be synthetic fiber bundles. In that case, the weft yarn 3 may contain at least a glass fiber bundle.

  Moreover, in the present invention, the mesh fabric 1 may be further covered with a coating resin. When the mesh fabric 1 is covered with a coating resin, the workability can be further enhanced. In addition, as such a coating resin, an acrylic resin, vinyl acetate type resin, unsaturated polyester resin, vinyl ester resin etc. can be used, for example. When covering the mesh fabric 1 with the covering resin, the resin as the raw material can be emulsified, and the emulsified resin can be applied to the mesh fabric 1.

(Glass fiber bundle)
The glass fiber bundle contains, as a glass composition, 12% by mass or more of ZrO ₂ and 10% by mass or more of R ₂ O (R is at least one selected from Li, Na and K).

As such a glass fiber bundle, for example, as a glass composition, SiO ₂ 54 to 65%, ZrO ₂ 12 to 25%, Li ₂ O 0 to 5%, Na ₂ O 10 to 17% by mass as K ₂ O _0~8%, R'O (provided that, R 'is, Mg, Ca, Sr, Ba , represents a _{Zn) 0~10%, TiO 2 0~7} %, the _Al 2 O 3 _0~2% Containing, preferably, by mass%, SiO ₂ 57-64%, ZrO ₂ 14-24%, Li ₂ O 0.5-3%, Na ₂ O 11-15%, K ₂ O 1-5%, R 'O (wherein R' represents Mg, Ca, Sr, Ba, Zn) 0.2 to 8%, TiO ₂ 0.5 to 5%, Al ₂ O _{30 to 1} % is used be able to.

As described above, the mesh of the present invention is excellent in alkali resistance because it includes the glass fiber bundle containing 12% by mass or more of ZrO ₂ as the glass composition. Therefore, the mesh is less likely to be corroded by alkali components present in cement and the like. Therefore, it is possible to prevent the mesh from being deteriorated.

Of course, glasses containing 12% by mass or more of ZrO ₂ are difficult to melt, but in the present invention, since they further contain 10% by mass or more of R ₂ O, they contain 12% by mass or more of ZrO ₂ Is also excellent in meltability. In addition, 10 mass% or more of R ₂ O means that the total of the content of Li ₂ O, Na ₂ O and K ₂ O in the glass fiber bundle is 10 mass% or more.

  In the first embodiment, the glass fiber bundle may be, for example, a bundle of several tens to several hundreds. The glass fiber bundle is obtained by applying a sizing agent to the surface of the glass fiber, focusing, and drying the sizing agent. The dried sizing agent becomes a coating covering the surface of the glass fiber.

  As resin which comprises such a film, polyester resin is mentioned, for example. The polyester resin may be a saturated polyester resin or an unsaturated polyester resin. In addition, vinyl acetate resins and urethane resins may be used.

  Moreover, although the count of a glass fiber bundle is not specifically limited, It is preferable that it is 100-3000 tex. When the count of the glass fiber bundle is within the above range, the punching property of the mesh fabric can be further enhanced, and the reinforcing effect on the concrete structure can be further enhanced.

(Synthetic fiber bundle)
The synthetic fiber bundle has a breaking elongation of 4% or more and 35% or less measured in accordance with JIS R 3420 (2013). Examples of such synthetic fiber bundles include vinylon fiber bundles, polyester fiber bundles, polypropylene fiber bundles, and nylon fiber bundles. Among them, a vinylon fiber bundle is preferable from the viewpoint of further increasing the load in the punching test and further improving the punching characteristics.

  In the first embodiment, the synthetic fiber bundle may be a bundle of a plurality of synthetic fiber monofilaments or one synthetic fiber.

  Moreover, although the count of a synthetic fiber bundle is not specifically limited, It is preferable that it is 100-3000 tex. When the count of the synthetic fiber bundle is in the above range, the punching property of the mesh fabric can be further enhanced, and the reinforcing effect on the concrete structure can be further enhanced.

  Hereinafter, an example of a method of manufacturing the mesh fabric 1 will be described.

(Production method)
The method for producing the mesh fabric 1 is not particularly limited, and can be produced, for example, by the following method.

  First, a glass raw material introduced into a glass melting furnace is melted to be a molten glass, and after the molten glass is brought into a homogeneous state, the molten glass is drawn from a heat-resistant nozzle attached to a bushing. Thereafter, the drawn molten glass is cooled to form a glass fiber monofilament (glass fiber).

  Next, a sizing agent for forming a coating is applied to the surface of the glass fiber. With the sizing agent applied evenly, several hundreds to several thousands of the glass fibers are gathered, collected and dried to form a glass fiber bundle.

  The sizing agent preferably contains a solvent such as water, a polyester resin such as a saturated polyester resin or an unsaturated polyester resin, or a vinyl acetate resin or a urethane resin. It is desirable that these resins be in an emulsion state.

  The sizing agent may also contain, for example, a silane coupling agent. Specifically, aminosilane, epoxysilane, vinylsilane, acrylsilane, chlorosilane, mercaptosilane or ureidosilane can be used as the silane coupling agent. In addition, the effect of protecting the surface of a glass fiber bundle is produced by adding a silane coupling agent, and mechanical strength, such as tensile strength, can be improved further. In the present invention, since it is necessary to impregnate with a unsaturated polyester resin which is cured by radical polymerization, or a vinyl ester resin or to impregnate with various resins, vinylsilane or aminosilane is preferable.

  In addition to the above-mentioned silane coupling agent, the above-mentioned sizing agent can contain each component such as a lubricant, a nonionic surfactant or an antistatic agent.

  The obtained glass fiber bundle is made into the 1st strand 2a, and the warp yarn 2 is formed by being entangled with the synthetic fiber bundle as the 2nd strand 2b prepared beforehand. Further, the glass fiber bundle separately prepared by the above method and the synthetic fiber bundle separately prepared are twisted to form the weft yarn 3. By weaving the weft yarn 3 into the warp yarn 2, it is possible to obtain the mesh fabric 1 woven by entanglement.

  As described above, the mesh fabric 1 may be further covered with a coating resin. In such a case, a covering resin material such as an acrylic resin, unsaturated polyester resin or vinyl ester resin is applied to the mesh fabric 1 by a dipping method or a spraying method, and the crossing portion of the warp 2 and weft 3 is closed. In this case, the resin raw material may be in the form of either a resin emulsion or a solvent-based resin.

  Then, the resin applied to the mesh fabric 1 is dried. In addition, before drying, for example, the mesh may be pressed by a pair of squeeze rollers to squeeze the excessively applied resin. In the case of using a resin emulsion, drying is to evaporate water at a temperature of 100 to 120 ° C., and in the case of a solvent-based resin, the main purpose is to dry the contained solvent, so excessive curing may not be promoted. Preferably, it is dried at a temperature of 40 to 80 ° C.

  Further, in addition to the method of covering with a coating resin and performing a sealing process, a thermally fusible yarn may be mixed in the warp yarn 2 or the weft yarn 3 and the heat sealing may be performed by hot pressing. It is preferable to use a yarn having a glass transition temperature of 150 ° C. or less as the heat-fusible yarn because it can be sealed by hot pressing at a low temperature.

Second Embodiment
FIG. 2 is a schematic plan view showing a mesh according to a second embodiment of the present invention.

  As shown in FIG. 2, the mesh fabric 21 is configured by plain weave of the warp yarns 4 and the weft yarns 5. The warp 4 is composed of a glass fiber bundle 4a and a synthetic fiber bundle 4b. The glass fiber bundles 4 a and the synthetic fiber bundles 4 b are alternately arranged in the extending direction of the weft 5. The weft 5 is composed of a glass fiber bundle 5a and a synthetic fiber bundle 5b. The glass fiber bundles 5 a and the synthetic fiber bundles 5 b are alternately arranged in the extending direction of the warp 4. The other points are the same as in the first embodiment.

  The mesh fabric 21 of the second embodiment also includes the glass fiber having the above-mentioned specific composition and the synthetic fiber bundle having the above-mentioned specific breaking elongation, so that the punching as an index of the anti-slip property of concrete is carried out. In testing, both high loads and high displacements can be obtained. As described above, since the mesh fabric 21 is excellent in the punching property which is an index of the anti-slip property of concrete, the reinforcing effect of the concrete structure can be enhanced, and the mesh fabric 21 can be suitably used for the anti-slough application of concrete .

  As the mesh of the present invention, not only entanglement and plain weave as in the first and second embodiments but also imitation twill woven fabric can be used. However, the mesh of the present invention may be a woven fabric, and the method of forming the mesh is not particularly limited. Among these, it is preferable to be imitation twill weave. In the imitation twill weave, since one warp or one weft is constituted by three strands, the area of the contact point of the intersection of the warp and weft becomes large and it becomes easy to fasten. This makes the mesh difficult to unravel.

  Also, in the first and second embodiments, both the warp and weft are composed of both the glass fiber bundle and the synthetic fiber bundle, but in the present invention, all the warp yarns are only the glass fiber bundle or the synthetic fiber It may be composed only of bundles, and all the weft yarns may be composed only of fiber bundles different from warp yarns. However, in concrete flaking prevention applications, load is applied from the direction (vertical direction) perpendicular to the surface direction of the mesh, so from the viewpoint of dispersing the load from the vertical direction, all warp threads and all weft threads are all glass fiber It is preferable that it is comprised by both a bundle | flux and a synthetic fiber bundle.

[Concrete prevention material]
FIG. 3 is a schematic cross-sectional view showing a concrete peeling-off preventing material according to an embodiment of the present invention. As shown in FIG. 3, the concrete peel-off preventing material 10 includes a mesh fabric 1 and a matrix 12. The mesh fabric 1 is the mesh fabric of the first embodiment described above. The mesh fabric 1 is embedded inside the matrix 12. In addition, as shown in FIG. 3, the concrete peeling prevention material 10 can be stuck and used for the concrete housing 13, for example.

  Thus, in the concrete peeling prevention material 10, since the mesh fabric 1 having excellent punching characteristics is embedded in the inside of the matrix 12, the reinforcing effect of the concrete can be enhanced, and the concrete is effectively prevented from peeling off. be able to.

  The material of the matrix 12 is not particularly limited, and for example, a resin matrix made of an epoxy resin, an acrylic resin, a urethane resin or the like can be used. These may be used alone or in combination of two or more. Also, in the present invention, the matrix may not be resin, and may be, for example, cement. In any case, since the mesh fabric 1 is excellent in the punching property, the reinforcing effect of the concrete can be enhanced, and the peeling of the concrete can be effectively prevented.

  Hereinafter, the present invention will be described in more detail based on specific examples. The present invention is not limited to the following examples at all, and can be implemented with appropriate modifications without departing from the scope of the present invention.

(Examples 1 to 12)
_First, SiO 2 57.9 _wt%, ZrO 2 17.2 _wt%, Li 2 O 0.5 _wt%, Na 2 O 14.8 _wt%, K 2 O 1.3 wt%, CaO 0.9 mass The raw material was prepared to be a glass having a composition of%, TiO ₂ 7.4% by mass, and the molten molten glass was drawn out of a bushing having several hundreds to several thousands of nozzles.

  Next, a sizing agent in which vinylsilane, a saturated polyester resin, and a lubricant are dispersed in water is prepared and applied to the surface of the obtained glass fiber by an applicator so that the ignition loss is 0.8% by mass. After bundling the glass fibers, the sizing agent was dried to produce a glass fiber bundle.

  Next, a mesh fabric 31 shown in FIG. 4 was produced. Specifically, the glass fiber bundle 32a obtained as described above and the synthetic fiber bundle 32b prepared in advance were entangled to produce a warp yarn 32. Next, the glass fiber bundle 33a separately prepared as described above and the synthetic fiber bundle 33b were twisted to produce a weft yarn 33. By weaving the weft yarn 33 into the warp yarn 32, a mesh woven fabric 31 woven by entanglement was obtained. The details of the material constituting the mesh fabric 31 obtained in Examples 1 to 12 are shown in Tables 1 and 2 below. In Examples 1 to 7 and Examples 9 to 12, vinylon fiber (break elongation: 9.5%) was used as a synthetic fiber bundle. In Examples 4 and 12, as the synthetic fiber bundle, one obtained by combining two vinylon fiber bundles is used. In Example 8, polypropylene fibers (PP, elongation at break: 30%) were used as the synthetic fiber bundles.

(Examples 13 to 17)
In Examples 13 to 17, the mesh fabric 41 shown in FIG. 5 was produced. Specifically, a glass fiber bundle 42a obtained in the same manner as in Example 1 and a synthetic fiber bundle 42b prepared in advance were entangled to produce a warp yarn 42. Further, separately, a glass fiber bundle 43a prepared in the same manner as in Example 1 and a synthetic fiber bundle 43b prepared separately were used as the weft yarn 43. By weaving the weft yarn 43 into the warp yarn 42, a mesh woven fabric 41 woven by entanglement is obtained. In the mesh fabric 41, the glass fiber bundles 43a and the synthetic fiber bundles 43b as the weft yarn 43 are alternately arranged in the direction in which the warp yarns 42 extend. The details of the materials constituting the mesh fabric 41 obtained in Examples 13 to 17 are shown in Tables 1 and 2 below. In addition, in the warp of Examples 13-15 and Examples 16 and 17, the vinylon fiber (breaking elongation: 9.5%) was used as a synthetic fiber bundle. In the wefts of Examples 16 and 17, polypropylene fibers (PP, elongation at break: 30%) were used as synthetic fiber bundles.

(Examples 18, 19)
In Examples 18 and 19, the mesh fabric 51 shown in FIG. 6 was produced. Specifically, two glass fiber bundles obtained in the same manner as in Example 1 were entangled to produce a warp yarn 52. Also, a synthetic fiber bundle prepared separately was used as the weft yarn 53. By weaving the weft yarn 53 into the warp yarn 52, a mesh woven fabric 51 woven by entanglement is obtained. The details of the materials constituting the mesh fabric 51 obtained in Examples 18 and 19 are shown in Tables 1 and 2 below. In Example 18, vinylon fiber (break elongation: 9.5%) was used as a synthetic fiber bundle, and in Example 19, polypropylene fiber (PP, break elongation: 30%) was used as a synthetic fiber bundle.

Example 20
In Example 20, a mesh fabric 61 shown in FIG. 7 was produced. Specifically, a warp yarn 62 was produced by intertwining two previously prepared vinylon fiber bundles (breaking elongation: 9.5%). Further, a glass fiber bundle obtained in the same manner as in Example 1 was used as the weft yarn 63. By weaving the weft yarn 63 into the warp yarn 62, a mesh woven fabric 61 woven by entanglement is obtained. The details of the material constituting the mesh fabric 61 obtained in Example 20 are shown in Tables 1 and 2 below.

(Example 21)
In Example 21, a mesh fabric 71 shown in FIG. 8 was produced. Specifically, a glass fiber bundle 72a obtained in the same manner as in Example 1 and a vinylon fiber bundle (break elongation: 9.5%) as a synthetic fiber bundle 72b prepared in advance were used as a warp yarn 72. . In addition, a glass fiber bundle 73a separately obtained in the same manner as in Example 1 and a vinylon fiber bundle (break elongation: 9.5%) as a synthetic fiber bundle 73b prepared in advance were used as the weft yarn 73. The woven fabric 71 was obtained by plain-weaving the warp yarn 72 and the weft yarn 73. The glass fiber bundles 72 a and the synthetic fiber bundles 72 b were alternately arranged in the direction along the weft yarn 73. The glass fiber bundles 73 a and the synthetic fiber bundles 73 b were alternately arranged in the direction along the warp yarn 72. The details of the material constituting the mesh fabric 71 obtained in Example 21 are shown in Tables 1 and 2 below.

(Example 22)
Example 22 is the same as Example 21 except that a polypropylene fiber bundle (PP, elongation at break: 30%) prepared in advance instead of a vinylon fiber bundle is used as the synthetic fiber bundle 72b constituting the warp yarn 72. The mesh fabric 71 was produced. Details of the materials constituting the mesh woven fabric 71 obtained in Example 22 are shown in Tables 1 and 2 below.

(Examples 23, 24)
In Examples 23 and 24, a mesh fabric 81 shown in FIG. 9 was produced. Specifically, the glass fiber bundles 82a1 and 82a3 obtained in the same manner as in Example 1 and the synthetic fiber bundle 82a2 were used as warp yarns 82a. The glass fiber bundle 82b2 obtained in the same manner as in Example 1 and the synthetic fiber bundles 82b1 and 82b3 were used as warp yarn 82b.

  The glass fiber bundles 83a1 and 83a3 obtained in the same manner as in Example 1 and the synthetic fiber bundle 83a2 were used as the weft yarn 83a. A glass fiber bundle 83b2 obtained in the same manner as in Example 1 and synthetic fiber bundles 83b1 and 83b3 were used as weft yarn 83b. A mesh fabric 81 was obtained by imitation twilling the warp yarn 82a, warp yarn 82b, weft yarn 83a, and weft yarn 83b.

  The warp yarns 82a and the warp yarns 82b are alternately arranged in the direction along the weft yarn 83a. In the warp yarn 82a, the glass fiber bundle 82a1, the synthetic fiber bundle 82a2, and the glass fiber bundle 82a3 are arranged in this order in the direction along the weft yarn 83a. On the other hand, in the warp yarn 82b, the synthetic fiber bundle 82b1, the glass fiber bundle 82b2, and the synthetic fiber bundle 82b3 are arranged in this order in the direction along the weft yarn 83a.

  The weft yarn 83a and the weft yarn 83b are alternately arranged in the direction along the warp yarn 82a. In the weft yarn 83a, the glass fiber bundle 83a1, the synthetic fiber bundle 83a2, and the glass fiber bundle 83a3 are arranged in this order in the direction along the warp yarn 82a. In the weft yarn 83b, the synthetic fiber bundle 83b1, the glass fiber bundle 83b2, and the synthetic fiber bundle 83b3 are arranged in this order in the direction along the warp yarn 82a. The details of the material constituting the mesh fabric 81 obtained in Examples 23 and 24 are shown in Tables 1 and 2 below. In Examples 23 and 24, polypropylene fibers (PP, elongation at break: 30%) were used as synthetic fiber bundles.

(Comparative example 1)
In Comparative Example 1, a mesh woven fabric 31 was obtained in the same manner as in Example 1 except that polypropylene fibers (PP, elongation at break: 40%) were used as the synthetic fiber bundles.

(Comparative example 2)
In Comparative Example 2, two glass fiber bundles obtained in the same manner as Example 1 were entangled to produce a warp. Next, two glass fiber bundles separately prepared in the same manner as in Example 1 were twisted to produce a weft. By weaving the weft yarn into the warp yarn, a mesh woven fabric consisting only of glass fiber bundles woven by entanglement was obtained. The details of the materials constituting the mesh fabric obtained in Comparative Example 2 are shown in Tables 1 and 2 below.

(Comparative example 3)
In Comparative Example 3, two synthetic fiber bundles prepared in advance were entangled to produce a warp. Next, two synthetic fiber bundles prepared separately were twisted to produce a weft yarn. By weaving the weft yarn into the warp yarn, a mesh woven fabric consisting only of synthetic fiber bundles woven by entanglement was obtained. The details of the material constituting the mesh fabric obtained in Comparative Example 3 are shown in Tables 1 and 2 below. In Comparative Example 3, polypropylene fibers (PP, elongation at break: 30%) were used as the synthetic fiber bundles.

(Characterization of sample characteristics)
Tensile strength;
The tensile strengths of the warp and weft in the mesh woven fabrics obtained in Examples 1 to 24 and Comparative Examples 1 to 3 were measured in accordance with JIS L 1096 (2010). Specifically, five test pieces each having a width of 25 mm and a length of 200 mm were collected from the mesh fabric from each of the vertical direction and the lateral direction. The test was performed using an autograph (manufactured by Shimadzu Corporation) under measurement conditions of a span (gripping distance) of 100 mm and a tensile speed of 50 mm / min. The results are shown in Table 2 below.

Punching test (punching performance);
The push-out test of the mesh fabric obtained in Examples 1 to 24 and Comparative Examples 1 to 3 is issued in July 2015 by East Japan Expressway Co., Ltd., Chuo Nippon Expressway Co., Ltd. and West Japan Expressway Co., Ltd. Tested NEXCO test method Vol. 7 Tunnel relation test method The punching load at the time of core fracture (core fracture load) and the punching load when displaced by 5 mm, 10 mm and 20 mm are shown in Table 2 below.

From Table 1 and Table 2, at least one of warp and weft is constituted, and as a glass composition, at least 12% by mass of ZrO ₂ and R ₂ O (R is at least one selected from Li, Na and K And at least one of a glass fiber bundle, a warp yarn and a weft yarn containing 10% or more by weight of a seed) and having a breaking elongation of 4% or more measured in accordance with JIS R 3420 (2013). The mesh fabric comprising synthetic fiber bundles having 35% or less had high tensile strength and good push-out test results. On the other hand, in the mesh fabrics of Comparative Examples 1 to 3, in the punching test, one of the results of the core breaking load, the displacement of 5 mm, the displacement of 10 mm and the displacement of 20 mm was not sufficient.

1, 21, 31, 41, 51, 61, 71, 81 ... mesh fabric 2, 4, 32, 42, 52, 62, 72, 82a, 82b ... warp yarn 2a, 2b ... first and second strands 4a, 5a, 32a, 33a, 42a, 43a, 72a, 82a1, 82a3, 82b2, 83a1, 83a3, 83b2 ... glass fiber bundles 4b, 5b, 32b, 33b, 42b, 43b, 72b, 73b, 82a2, 82b1, 82b3 , 83a2, 83b1, 83b3 ... synthetic fiber bundles 3, 5, 33, 43, 53, 63, 73, 83a, 83b ... weft 10 ... concrete anti-slip material 12 ... matrix 13 ... concrete rod

Claims (13)

A mesh composed of a plurality of warps and a plurality of wefts,
A glass fiber bundle containing, as a glass composition, 12% by mass or more of ZrO ₂ and 10% by mass or more of R ₂ O (R is at least one selected from Li, Na and K);
Synthetic fiber bundle having a breaking elongation of 4% or more and 35% or less measured in accordance with JIS R 3420 (2013),
, Mesh.   The mesh according to claim 1, wherein the synthetic fiber bundle is a vinylon fiber bundle. The mesh according to claim 1, wherein the basis weight is 100 g / m ² or more and 450 g / m ² or less. The basis weight of the glass fiber bundle is 50 g / m ² or more and 250 g / m ² or less,
The mesh according to any one of claims 1 to 3, wherein the basis weight of the synthetic fiber bundle is 30 g / m ² or more and 200 g / m ² or less.   The mesh of any one of Claims 1-4 whose mass ratio of the said synthetic fiber bundle in the said mesh is 10 mass% or more and 70 mass% or less.   The mesh according to any one of claims 1 to 5, wherein a volume ratio of the synthetic fiber bundle in the mesh is 20% or more and 80% or less.   The mesh of any one of Claims 1-6 whose mass ratio of the said glass fiber bundle in the said mesh is 30 mass% or more and 90 mass% or less.   The mesh according to any one of claims 1 to 7, wherein a volume ratio of the glass fiber bundle in the mesh is 20% or more and 80% or less.   The mesh according to any one of claims 1 to 8, wherein the tensile strength in the direction along the warp and the direction along the weft is 200 N / 25 mm or more, respectively.   10. A mesh according to any one of the preceding claims, consisting of a twill weave fabric.   The mesh according to any one of claims 1 to 10, wherein at least one of the warp and the weft is composed of both the glass fiber bundle and the synthetic fiber bundle.   The mesh according to any one of claims 1 to 11, which is used as a cochleate peel-off preventing material. With the matrix,
The mesh according to any one of claims 1 to 12;
Concrete with anti-abrasive material.

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