JP2008255549A - Mesh woven fabric and composite structure for building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mesh woven fabric having high tensile strength in addition to chemical stability, and to provide a composite structure for a building produced from the mesh woven fabric and having long-term stability after construction in respect to mechanical strength and scarcely producing structural defect. <P>SOLUTION: The mesh woven fabric 10 has a warp group 30 obtained by regularly arranging a plurality of pairs V1-V6 of warps using one yarn or two or more yarns as one pair and weft groups 21 and 22 obtained by regularly arranging a plurality of pairs of wefts W1-W7 using one yarn or two or more yarns as one pair, and crossed places K1-K42 of a mesh body fixed in a state in which the weft groups 21 and 22 in adjacent arrangement is crossed with the warp group are coated with a hot-melt type resin. The composite structure for a building is composed of the mesh woven fabric 10 and mortar and the mortar has 2.0-4.0 MPa flexural strength defined in JIS R5201 (1997) and 1.0-1.5 unit volume mass defined in JIS A1171 (2000). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is used for various cement products, outer walls of structures such as buildings, and the like, and is used for reinforcement of mortar and concrete and prevention of crack expansion, and for a building using this mesh fabric. It relates to the composite structure.

  Mortars that are commonly used as various cement products, building exterior wall materials, floor materials, etc., are prone to structural defects such as cracks, cracks and chips on the construction surface when dried and contracted after construction. is there. If a defect such as a crack that has occurred is left for a long period of time, the crack may expand over time from the surface of the cement product or mortar to the inside and further to the back. The crack portion thus expanded has a problem that water leaks due to intrusion of water, sludge, and the like, and there is also a problem that the strength of the entire structure is weakened due to a decrease in durability against external force. In order to prevent the occurrence of such problems, a mesh fabric made of glass fiber or the like is embedded in mortar used for cement products or building outer walls to reinforce the cement products and mortar and cracks. The construction method which prevents expansion has been conventionally performed.

In the mesh-like woven fabric, since the glass fiber constituting the woven fabric is easily eroded by the alkaline substance in the cement, Patent Document 1 discloses an invention that can be improved by limiting the composition of the glass fiber. Patent Document 2 discloses an invention in which the tensile strength can be improved by limiting the number of twists in addition to the glass fiber count. Further, Patent Document 3 discloses that the use of glass fibers and fibers having different counts from the viewpoint of improving the deterioration of the appearance quality, and limiting the mesh spacing and the resin adhesion rate. Further, in Patent Document 4, after applying lightweight cement mortar and pressing and embedding a net material having a mass per unit area of 40 to 250 g / m ² and a tensile strength of 100 kgf / mm ² or more on the surface thereof. The construction method of the outer wall of the building which can improve the durability of the mortar layer and prevent cracking and peeling of the mortar layer by performing finish construction is disclosed.
JP 2000-328391 A JP 2002-155450 A JP 2002-302877 A JP-A-10-102720

  However, the inventions made so far are not sufficient to achieve a mesh-like woven fabric that achieves high performance and has a stable quality. In other words, with conventional mesh fabrics alone, high stability is achieved over a long period of time, and it is difficult to completely suppress defects such as cracks that are likely to occur in mortar used as cement products and building exterior wall materials. It was difficult to obtain a composite structure for a building in which the above defects did not occur over a long period of time.

  In order to expand the application range of the mesh fabric of the present invention and apply it to various construction sites. It is preferable that more stable strength can be realized, and as such a wide range of application points, specifically, the outer wall surface and foundation surface of a building such as a house or a building, the floor surface such as a soil or a slab, There are ceiling surfaces, tunnel surfaces such as roads and railroads, breakwater slopes such as rivers and bays, and various other public facilities such as pillars, wall materials and bridges.

  The present invention solves the above-mentioned problems, and a mesh fabric having a high tensile strength in addition to chemical stability, and a mesh fabric manufactured using this mesh fabric, with respect to mechanical strength. It is an object of the present invention to provide composite structures for various buildings that have not only structural stability such as cracks but also long-term stability after construction.

  The mesh-like woven fabric of the present invention comprises a group of warp yarns formed by regularly arranging a plurality of warp yarn groups each composed of one yarn or two or more yarns, and one yarn or two or more yarns. And a weft yarn group formed by regularly arranging a plurality of weft yarn pairs each having a set of yarns, and a warp yarn having a mesh body formed by arranging the weft yarn groups adjacent to each other and fixing them in a crossing manner with the warp yarn groups. The intersection of the pair of yarns and the pair of weft yarns is covered with a hot melt type resin.

  Here, a warp yarn group in which a set of a plurality of warp yarns including one yarn or two or more yarns as a set is regularly arranged, and one yarn or two or more yarns as one set. And a weft group formed by regularly arranging a set of a plurality of weft yarns, and an intersection of mesh bodies formed by adhering the weft yarn group adjacently and intersecting with the warp yarn group is a hot melt type. The coating with the resin is as follows. That is, in the mesh-like woven fabric, a plurality of warp yarn bundles in which one or more warp yarns are bundled are arranged in a certain order, and one or more yarns arranged so as to be substantially orthogonal to the mesh fabric are a bundle. In a mesh-like woven fabric having a mesh-like appearance in which the weft yarn bundles are fixed to each other, an adhesive used for fixing the warp yarn bundle and the weft yarn bundle at a substantially perpendicular intersection of the mesh body However, it does not vaporize at room temperature, does not contain harmful solvents or water as its components, and is nonflammable having thermoplasticity by softening and flowing without being ignited by heating from about 100 ° C. to about 180 ° C. This means that the adhesive is used. That is, apart from the other parts of the mesh body, at least at the intersections, the warp yarn bundle and the weft yarn bundle are impregnated with a hot melt type resin.

  A group of warp yarns formed by regularly arranging a set of a plurality of warp yarns including one yarn or a set of two or more yarns, and a plurality of sets consisting of one yarn or a set of two or more yarns For the weft yarn group in which the weft yarn group is regularly arranged, the number of one set of yarns constituting the warp yarn group or the weft yarn group should be from 1 to about 5, more Preferably, the number is set to two or three, and the number can be appropriately changed according to the use such as the thickness of the yarn, the arrangement interval, the place where the mesh fabric is applied, and the usage method. .

  Moreover, in the mesh-like woven fabric of the present invention, any kind of weaving method may be used as long as the warp yarn group and the weft yarn group are woven so as to cross each other. In addition, the material type of the hot melt type resin and the material type of the weft and warp yarn can be selected appropriately depending on the application as long as the material can realize a desired strength performance. The warp yarn and the weft yarn may be different or the same material. The resin material may be a combination of a plurality of materials or a single material.

  However, particularly preferable examples of the hot melt type resin according to the present invention include ethylene-vinyl acetate (EVA), high density polyethylene (high density PE), low density polyethylene (low density PE), polypropylene (PP ), Polyester, polyamide, polyvinyl chloride and the like. Such resins can be used singly or as a mixture of plural kinds at an appropriate ratio. For these resins, a plurality of additives may be used in combination, and various trace additives may be added to further improve the performance of the resin.

  The adhesion rate of the hot melt type resin to the mesh fabric made of warp or weft is not particularly limited as long as the desired performance is exhibited, but the entire mesh fabric after the hot melt type resin is applied. More preferably, it is in the range of 3% to 30%, preferably 5% to 25%, expressed as a percentage by mass. That is, when the adhesion rate of the resin is less than 3% by mass, the effect of sealing is reduced, and the risk of misalignment of the mesh fabric is increased. If the adhesion rate of the resin exceeds 30% by mass, the cost of the mesh woven fabric becomes expensive and an opening of the mesh woven fabric, that is, an excessive amount of hot melt type resin film is formed in the mesh. As a result, the compatibility between the mortar and the mesh-like woven fabric is impaired, and sufficient strength is exhibited when a composite is constructed. Since it becomes difficult to do, it is not preferable.

As for the material of the warp yarn and the weft yarn, an organic material or an inorganic material may be used as long as it has a predetermined performance as described above, and as a particularly preferable one, carbon fiber, aramid fiber, vinylon fiber, glass fiber, polyethylene fiber, There are ceramic fibers. Further, glass fibers are preferred because they are easy to use economically in addition to high strength performance. If glass fibers are used, the glass fibers used in the mesh-like woven fabric are expressed as zirconium oxide in terms of oxide mass percentage, that is, the content of ZrO ₂ is 14 mass% or more in terms of mass percentage. If the glass fiber is an alkali-resistant glass fiber, the tensile strength of the glass fiber can be prevented from decreasing over time due to the alkaline substance in the cement even if it is mixed into the mortar. This is particularly preferable because the effect of preventing defects can be maintained over a long period of time.

To exemplify compositions suitable alkali-resistant glass fibers that can be applied to the mesh-like fabric of the present invention, SiO ₂ 54 to 65% by mass percentage of oxide _{equivalent, ZrO 2 14~25%, Li 2} O 0~5 %, Na ₂ O 10-17%, K ₂ O 0-8%, RO (where R represents Mg, Ca, Sr, Ba, Zn) 0-10%, TiO ₂ 0-7%, Al 2 O 3 0-2%, more preferably, in _{mass%, SiO 2 57~64%, ZrO} 2 18~24%, Li2O 0.5~3%, Na 2 O 11~15%, K 2 O 1~ 5%, RO (however, R represents Mg, Ca, Sr, Ba, Zn) 0.2-8%, TiO ₂ 0.5-5%, Al ₂ O ₃ 0-1%. The expression RO (where R represents Mg, Ca, Sr, Ba, Zn) does not mean that all of these components are contained, but the total amount of MgO, CaO, SrO, BaO, and ZnO. When expressed as RO, it means a range of 0 to 10%, more preferably a range of 0.2% to 8% by mass in terms of oxide-based mass percentage.

SiO ₂ 54 to 65% meshed fabric of the present invention is represented by mass percentage terms of _{oxides, ZrO 2 14~25%, Li 2} O 0~5%, Na 2 O 10~17%, K 2 O 0~ 8%, RO (however, R represents Mg, Ca, Sr, Ba, Zn) 0-10%, TiO ₂ 0-7%, Al 2 O 3 0-2%, more preferably, by mass% _{SiO 2 57~64%, ZrO 2 18~24} %, Li2O 0.5~3%, Na 2 O 11~15%, K 2 O 1~5%, RO ( where, R represents, Mg, Ca, Sr 0.2-8%, TiO ₂ 0.5-5%, Al ₂ O ₃ 0-1%, not only high strength performance but also excellent chemical durability Therefore, it becomes more stable.

In addition to the above, various components can be added to the mesh-like woven fabric of the present invention as necessary within a range that does not significantly affect the performance of the mesh-shaped woven fabric of the present invention. If specifically exemplified what can be used as a component of the mesh-like fabric of the present _{invention, P 2 O 5, Fe 2} O 3, Sb 2 O 3, As 2 O 3, SO 2, Cl 2, F 2 , PbO, La ₂ O ₃ , WO ₃ , Nb ₂ O ₅ , Y ₂ O ₃ , MoO ₃ , rare earth oxides, lanthanoid oxides and the like may be contained if the content is 3% or less in terms of mass%. it can.

Of these additives, since Fe ₂ O ₃ is preferably less, the upper limit is preferably set to 1% or less in terms of mass% in terms of oxide.

In addition to the above, trace components can be contained up to 0.1% in terms of mass%. For example, various trace components such as OH, H ₂ , CO ₂ , CO, H ₂ O, He, Ne, Ar, and N ₂ are applicable.

  Moreover, in the tempered plate glass of the present invention, a trace amount of a noble metal element may be contained in the glass as long as the performance of the mesh fabric is not greatly affected. For example, white metal elements such as Pt, Rh, and Os may be contained up to ppm order.

  As the form of the glass fiber constituting the mesh-like woven fabric of the present invention, there are yarn, roving, DWR (direct winding roving), etc. Especially when the form of the glass fiber is yarn, the glass fiber and hot melt type are available. The compatibility with the resin is improved, and as a result, the compatibility between the mesh-like woven fabric and the mortar is improved, and a strong structure is obtained.

  In addition to the above, if the tensile strength according to JIS L1096 (1999) in the vertical direction and the horizontal direction is 500 N / 25 mm or more, the mesh fabric of the present invention has a high effect of preventing cracks and high strength. When the structure can be configured and reliability of various types of buildings is required, a building having high stability in the long term can be configured by using it in accordance with an appropriate usage method in order to improve its strength. It becomes possible.

  Here, the tensile strength according to JIS L1096 (1999) in the vertical direction and the transverse direction is 500 N / 25 mm or more, and the mesh-like woven fabric is measured by the measuring method according to Japanese Industrial Standard (JIS) L1096 issued in 1999. When a tensile force is applied along the mesh fabric while being held at a size of 25 mm in the weft direction, ie, the weft direction of the warp yarn, and the weft direction, ie, the weft direction of the weft yarn, the strength should be 500 N or more. Means.

  The tensile strength may be measured by using a strength test apparatus calibrated with a standard weight in accordance with JIS L1096 (1999) “General Textile Test Method”.

  In addition to the above, the mesh woven fabric of the present invention has a compound containing at least one of a glycidyl group, an amino group and a ureido group on the surface of the yarn. If 2% adheres, the compatibility between the yarn and the hot melt resin is good, the adhesion between the mesh fabric and the mortar is excellent, the effect of preventing cracks is high, and the structure has high strength. It becomes possible.

  Here, on the surface of the yarn constituting the mesh-like woven fabric, 0.002 to 0.2% in terms of mass percentage is attached to the yarn by the compound containing any one or more of glycidyl group, amino group and ureido group. It means that a compound having one or more functional groups of glycidyl group, amino group and ureide group is attached to the surface of the yarn, and this compound is in a dry state. It means that it is attached so as to be within the range of 0.002% to 0.2% in terms of mass percentage with respect to the mass of the yarn.

  As the compound containing a glycidyl group, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, and γ-glycidoxypropyltriethoxysilane can be used. Examples of the compound containing an amino group include N-β (aminoethyl) γ-aminopropylmethyldimethoxysilane, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, γ-aminopropyltrimethoxysilane, γ- Aminopropyltriethoxysilane and N-phenyl-γ-aminopropyltrimethoxysilane can be used. As the compound containing a ureido group, γ-ureidopropyltriethoxysilane or the like can be used.

  In the mesh woven fabric of the present invention, the compound containing any one or more of glycidyl group, amino group, and ureido group on the surface of the yarn constituting the mesh woven fabric is 0.002% in terms of mass percentage with respect to the yarn. By adhering to the above, the effect of improving the compatibility between the yarn and the hot melt type resin is obtained, and the adhesion characteristics between the mesh-like woven fabric and the mortar are improved, but the adhesion amount is 0.002%. If it is less than 1, this effect may not be sufficiently obtained. In addition, when the yarn constituting the mesh fabric is a compound containing any one or more of glycidyl group, amino group, and ureido group, and the amount of adhesion to the yarn exceeds 0.2% in terms of mass percentage, the mesh shape This is not preferable because the cost of the fabric is expensive. From the above viewpoint, the yarn constituting the mesh woven fabric has a 0.002 to 0.2% adhesion treatment in terms of mass percentage with respect to the yarn by a compound containing any one or more of glycidyl group, amino group and ureido group. More preferably, the adhesion treatment is performed in the range of 0.005 to 0.15%.

  As a method for adhering a compound containing any one or more of a glycidyl group, an amino group and a ureido group in an amount of 0.002 to 0.2% in terms of mass percentage with respect to the yarn, an aqueous solution in which the compound is dissolved in water is used. In this state, an appropriate amount of applicator or other applicator can be attached to the yarn surface, and various additives may be added as necessary for the purpose of further improving properties such as adhesion to the yarn surface and binding properties. May be added.

  As a method for confirming whether the compound contains at least one of glycidyl group, amino group and ureido group, for example, measurement of infrared absorption spectrum (IR), pyrolysis gas chromatography (Py-GC), etc. It can be confirmed by using the method.

  The composite structure of a building of the present invention is a composite structure for a building composed of a mesh-like woven fabric and a mortar. The mesh-like woven fabric is a mesh-like woven fabric of the present invention, and the mortar is JIS R5201 (1997). ) According to JIS A1171 (2000), and bending strength according to JIS A1171 (2000) is 1.0 to 1.5.

  Here, it is a composite structure for a building comprising a mesh-like woven fabric and a mortar, wherein the mesh-like woven fabric is a mesh-like woven fabric of the present invention, and the mortar has a bending strength of 2.0 to 2.0 according to JIS R5201 (1997). It is 4.0 MPa and the unit volume mass according to JIS A1171 (2000) is 1.0 to 1.5 as follows. That is, a warp yarn group formed by regularly arranging a set of a plurality of warp yarns including one yarn or a set of two or more yarns as a constituent material of a composite structure of a building, and one yarn Or a weft yarn group formed by regularly arranging a plurality of weft yarn pairs each having two or more yarns as a set, and the weft yarn groups are arranged adjacent to each other, and are crossed and fixed to the warp yarn group. The mesh-like woven fabric in which the intersection of the mesh body is covered with a hot-melt type resin, and the bending strength according to Japanese Industrial Standard (JIS) R5201 (1997) is 2.0 to 4.0 MPa, which is also JIS A1171 (2000 It represents that it is a composite structure with the mortar whose unit volume mass according to) is 1.0-1.5.

  More specifically, the bending strength of the mortar is measured according to the bending strength test method of mortar described in JIS R5201 “Physical testing method of cement” in 1997, and the measurement result is the composite structure of the present invention. It shows that it becomes a measured value within the range of 2.0 MPa to 4.0 MPa suitable for.

  Moreover, about the unit volume mass of mortar, by measuring by the unit volume mass test method described in JIS A1171 "Test method of polymer cement mortar" of 2000, the measurement result becomes the composite structure of this invention. It means that the value is in the range of 1.0 to 1.5.

  When the bending strength of mortar is less than 2.0 MPa, even when a composite structure is formed, the strength is low, and when applied to a building, cracks and the like are likely to occur, which is not preferable. If the bending strength of the mortar exceeds 4.0 MPa, the strength of the mortar alone is high, but the crack prevention effect and the reinforcing effect of the mesh woven fabric are low, or the familiarity between the mesh woven fabric and the mortar is poor. This is not preferable.

  If the unit volume mass of the mortar is less than 1.0, the strength of the mortar may be weakened due to the low density, which is not preferable. On the other hand, if the unit volume mass of the mortar exceeds 1.5, the denseness is increased, but the compatibility with the mesh-like woven fabric may be deteriorated.

  In other words, the performance of the mortar that determines the performance of the composite structure of the building is sufficiently high in strength and also excellent in compatibility with mesh fabrics. However, if both are not satisfied, it will be difficult to maintain stable performance over a long period of time.

  The mortar according to the present invention is based on cement, and is generally used as a material for building civil engineering, such as cement, fine aggregate, light aggregate, water, cement mortar containing water-based polymer dispersion, Polymer cement mortar or the like can be used. Furthermore, water reducing agent, AE agent, fluidizing agent, thickener, waterproofing agent, rust preventive agent, curing accelerator, curing retarder, blast furnace slag, fly ash, silica fume, colorant, quick setting agent, expansion as required An appropriate amount of agent, shrinkage reducing agent, reinforcing fiber, and the like may be added.

  The mesh spacing of the mesh fabric used in the composite structure of the building of the present invention is not particularly limited, and the smaller the mesh spacing is, the easier it is to prevent cracking of the mortar, but when trying to make the mesh spacing extremely small Since the familiarity between the mortar and the mesh-like woven fabric is poor and peeling easily occurs, 3 mm or more is preferable.

  In addition to the above, the composite structure of the building of the present invention can be applied if the mesh woven fabric is affixed on the surface of the mortar layer or is embedded in a mortar layer having a cover thickness. Depending on the location, various mesh fabrics can be used, and the composite structure of the building can be constructed using the mesh fabrics with sufficient long-term stable mechanical performance. Can do.

  Here, the mesh fabric is affixed to the surface of the mortar layer, or is embedded in a mortar layer having a cover thickness, and the construction of a composite structure for a mesh fabric construction It indicates that the position is affixed to the surface of the mortar layer so that a part thereof is buried, or is used by being buried under the mortar layer having a thickness depth inside the composite structure. .

  When pasting the mesh woven fabric on the surface of the mortar layer, the mesh woven fabric wound up in a roll shape is spread on the surface of the mortar layer in an undried state, and within the thickness dimension of the mesh woven fabric, its predetermined thickness The mesh woven fabric can be put on the surface of the mortar layer by applying pressure and pressing it so as to fill the mortar layer by the size, and holding in that state.

  In addition, when embedding a mesh fabric in a mortar layer having a cover thickness, after the mortar is driven in advance by a predetermined thickness, the mesh fabric wound in a roll shape is not applied in the same manner as when pasting on the surface. It can be applied by spreading on the surface of the mortar layer in a dry state and driving the mortar to a predetermined thickness from above.

  In addition to the above, the composite structure of a building according to the present invention suppresses cracks that are likely to occur on the surface of the mortar layer if the cover thickness is a thickness that does not exceed 40% of the thickness of the mortar layer. This is preferable because it provides a reliable function, that is, a crack prevention effect.

  The cover thickness is a thickness dimension that does not exceed 40% with respect to the thickness dimension of the mortar layer. When the total thickness of the composite structure of the building is 100, the thickness from the surface to suppress the occurrence of cracks is 40. It represents embedding a mesh-like woven fabric so as to have a depth dimension of up to%.

  Moreover, if the composite structure for buildings of the present invention is a wall material, a floor material, a ceiling material or a unit material in addition to the above, the present invention can be applied to a site where various problems concerning strength occur. Thus, it is possible to construct a structure that is unlikely to generate cracks over a long period of time.

  Here, the composite structure is a wall material, a floor material, a ceiling material and a unit material in various fields such as buildings, gulf coasts, rivers, railways, roads, bridges, dams, sewers, irrigation canals, and land preparations. It means that the composite structure to be used is used for a wall material, a floor material, a ceiling material of a structure, or a material combining a block-like material using a mortar formed in advance.

  (1) As described above, the mesh-shaped woven fabric of the present invention includes a group of warp yarns formed by regularly arranging a plurality of warp yarn sets each composed of one yarn or two or more yarns, and 1 And a weft group formed by regularly arranging a plurality of weft yarn groups each composed of one or more yarns, and the weft yarn groups are arranged adjacent to each other so as to intersect with the warp yarn group. Since the intersecting part of the warp yarn group and the weft yarn group of the mesh body is covered with a hot melt type resin, the mesh is surely sealed and uneven. This is a mesh-like woven fabric having a stable strength performance without any problems, and the workability is also good because the mesh fabric is hardly misaligned during construction.

  (2) The mesh-like woven fabric of the present invention has high tensile strength in addition to chemical stability if the tensile strength according to JIS L1096 (1999) in the vertical direction and the horizontal direction is 500 N / 25 mm or more. By using the mesh-like woven fabric of the present invention for a fragile building, it is possible to achieve high strength performance, and the building can be reinforced efficiently.

  (3) Further, in the mesh woven fabric of the present invention, the compound containing any one or more of glycidyl group, amino group and ureido group is 0 on the surface of the yarn constituting the mesh woven fabric in mass percentage display. If 0.002 to 0.2% adheres, it is possible to construct a structure having excellent adhesion characteristics between the mesh-like woven fabric and mortar, a high effect of preventing cracks, and high strength.

  (4) The composite structure for a building according to the present invention is a composite structure for a building composed of a mesh-like woven fabric and a mortar, and the mesh-like woven fabric according to claim 1 or 2. The mortar is woven and has a bending strength of 2.0 to 4.0 MPa according to JIS R5201 (1997) and a unit volume mass according to JIS A1171 (2000) of 1.0 to 1.5. Since the adhesion with the woven fabric is good and the adhesiveness at the interface between the mesh woven fabric and the mortar is high, the reinforcing effect of the mesh woven fabric is surely exhibited.

  (5) The composite structure for a building of the present invention is various as long as the mesh woven fabric is affixed on the surface of the mortar layer or is embedded in a mortar layer having a cover thickness. It is possible to adopt various construction methods, and it is possible to adopt various constructions that have been difficult to construct in the past.

  (6) The composite structure for a building of the present invention is a mesh-like woven fabric having a good fit with the mortar as long as the cover thickness does not exceed 40% of the thickness of the mortar layer. By embedding in an appropriate place, the reinforcing effect of the mesh fabric can be surely exhibited, and structural defects such as cracks that are likely to occur on the surface of the composite structure can be suppressed.

  (7) Furthermore, if the composite structure for a building of the present invention is a wall material, a floor material, a ceiling material or a unit material, the strength of a construction having a problem in strength can be improved efficiently. The application to which the mesh-like woven fabric is applied can be expanded.

  Below, the mesh-shaped woven fabric of the present invention and a composite structure for buildings constructed using the mesh-shaped woven fabric will be described based on examples.

  An example of the mesh fabric of the present invention is shown in FIG. In FIG. 1, 10 is a mesh fabric, 2 is a weft yarn, 3 is a warp yarn, 5 is a mesh body, W1 to W7 are weft yarn sets, V1 to V6 are warp yarn sets, and K1 to K42 are weft yarn sets. And the point where the set of warp yarns intersect.

The mesh fabric 10 is used to reinforce the wall surface in order to suppress cracks generated on the wall surface of the building, and the glass composition of the glass fiber includes each component in terms of mass percentage in terms of oxide. When _{viewing, SiO 2 57~64%, ZrO 2} 18~24%, Li2O 0.5~3%, Na 2 O 11~15%, K 2 O 1~5%, RO ( where, R represents, Mg, (Representing Ca, Sr, Ba, Zn) 0.2 to 8%, TiO ₂ 0.5 to 5%, Al ₂ O ₃ 0 to 1%.

  In this mesh fabric 10, the weft yarn group 21 of the mesh body 5 is a group of weft yarn groups W4a, W5, W6, and W7 arranged at predetermined equal intervals. Similarly, the weft yarn group 22 is a group of weft yarn groups W4b, W3, W2, W1 arranged at predetermined equal intervals. The weft yarn group 21 and the other weft yarn groups 22 are: Since W4a and W4b are adjacent to each other, as a result, the weft yarn group 21 and the weft yarn group 22 are adjacently arranged. In this example, the set of weft yarns constituting the weft group is composed of one or two weft 2 glass fibers. For example, the sets W7 and W6 of the weft yarn 2 are each composed of two weft 2 glass fibers, while W5 is composed of one weft 2 glass fiber.

  Further, the warp yarn 3 that is arranged so as to intersect with the weft yarn 2 so as to be substantially orthogonal to each other also has a configuration in which one warp yarn 3 and two warp yarns 3 form one set. The warp yarn group 30 composed of the sets V1, V2, V3, V4, V5, and V6 of the yarn 3 is in a state in which the surface thereof is coated with a hot-melt adhesive at locations K1 to K42 that intersect the weft yarn 2, It is in an eye-catching state. Here, ethylene-vinyl acetate (EVA) resin is used as the hot-melt type resin, but high density polyethylene (high density PE), low density polyethylene (low density PE), and polypropylene (PP) are also used here. , Polyester, polyamide, polyvinyl chloride and the like can be properly used as necessary.

  In the mesh-like woven fabric 10 having such a configuration, the arrangement pitch (interval distance) of the entire set of the weft yarns 2 is set to 5 mm in this embodiment, but may be within a range of 3 to 20 mm, for example. Preferably, it is set within a range of 3 to 10 mm. Further, the width of the weft group 2 is set to 1000 mm in this embodiment.

  Moreover, the manufacturing method of this mesh fabric 10 is as follows. First, a pair of warp yarns 3 that are long in the warp direction are continuously running in the warp direction at, for example, a speed of 40000 mm / min. On the other hand, the weft yarn group 21 composed of the weft yarn groups W4a, W5, W6, W7 or the weft yarn group 22 composed of the weft yarn groups W4b, W3, W2, W1 is in a state in which a hot melt type resin is applied in advance. , While being cut to a length corresponding to the width of the mesh-like woven fabric determined by a pair of traveling warp yarns 3, that is, a warp yarn group consisting of V1, V3, V5, etc. or a warp yarn group consisting of V2, V4, V6, etc. It is supplied intermittently. The weft yarn groups 21 and 22 intermittently supplied to the warp yarn group 30 are arranged so as to intersect with the warp yarn group 30 so that a plurality of the weft yarn groups 21 and 22 are adjacent to each other. Each of the warp yarn group consisting of V1, V3, V5, etc. and the warp yarn group consisting of V2, V4, V6, etc. The warp yarn group 30 is supplied in sequence. After this supply, the crosswise portions of the warp yarn group 30 and the weft yarn groups 21 and 22 are made of hot melt type resin by sequentially receiving heat treatment while the weft yarn groups 21 and 22 are sandwiched between the pair of warp yarn groups 30. The mesh-like woven fabric 10 is obtained as a result of being fixed and further solidifying.

  Next, another example in which the configuration is changed will be collectively shown as a second example. Here, the performance of the mesh fabric and the performance of the composite structure of the building manufactured by embedding the mesh fabric will be described.

  Table 1 summarizes the evaluation results on the strength of the composite fabric for a building of the present invention composed of the mesh fabric of the present invention, the mortar used together with the mesh fabric, and the mesh fabric and the mortar. It is a thing.

Glass composition of the glass fibers constituting the mesh-like fabric, SiO ₂ 61.0% by mass percentage of oxide _{equivalent, ZrO 2 19.5%, Li 2} O 1.5%, Na 2 O 12.3 %, K ₂ O 2.6%, CaO 0.5%, TiO ₂ 2.6%.

  The manufacturing procedure of the glass fiber in Table 1 is to prepare a homogeneous batch raw material prepared by mixing and mixing various glass raw materials so as to have the above-mentioned composition in advance, and then putting it into a melting furnace to obtain a homogeneous state. After pulling out from the nozzle opening of the characteristic bushing and rapidly cooling to glass fiber, sample no. For those other than 4, a sizing agent containing starch, a lubricant and a softening agent was applied to the surface of the alkali-resistant glass fiber, and yarns for warp yarn and weft yarn shown in Table 1 were produced. Sample No. For No. 4, a sizing agent containing a polyester resin was applied to the surface of the alkali-resistant glass fiber, and the warp yarn and the warp yarn DWR shown in Table 1 were produced.

  Sample No. 11, no. For No. 12, in addition to the sizing agent containing starch, lubricant, and softener on the surface of the alkali-resistant glass fiber, γ-glycidoxypropyltriethoxysilane is 0.01% and 0.1% in terms of mass percentage, respectively. It is applied to the surface of the glass fiber so as to have an adhesion rate of. Sample No. For No. 13, γ-aminopropyltriethoxysilane was applied to the surface of the glass fiber so that the adhesion rate was 0.01%. Sample No. For No. 14, γ-ureidopropyltriethoxysilane was applied to the surface of the glass fiber so as to have an adhesion rate of 0.01%.

  Next, when the warp yarn group travels, the weft yarn group to which the hot-melt type resin shown in Table 1 is crossed is crossed and heated and melted and cooled at 130 ° C. in the crossed state. Were fixed to each other with a hot-melt type resin to produce a mesh-like woven fabric. As for the adhesion rate of the hot melt type resin, the adhesion amount of the sizing agent is investigated in advance so that the adhesion rate of the total amount with the sizing agent becomes the value shown in Table 1, and the amount of application to the mesh fabric is determined. Adjustments were made.

  The value of the unit volume mass of the mortar in Table 1 is measured by the unit volume mass test method described in JIS A1171 (2000) “Test method for polymer cement mortar”.

  Moreover, the value of the bending strength of mortar is measured according to the bending strength test method of mortar described in JIS R5201 (1997) “Physical testing method of cement”.

  The count of the warp yarn is a combination of one or two glass fibers of 155 tex or 310 tex, and the warp yarn is the same. Regarding the eye spacing, for example, 5 × 5 indicates that the vertical direction is 5 mm and the horizontal direction is 5 mm.

  In addition, what is described as “EVA” as a type of hot melt type resin is ethylene-vinyl acetate resin, and what is indicated as “PE” is high-density polyethylene.

  In addition, the tensile strength test of the mesh woven fabric was made by Shimadzu Corp., which was calibrated in advance by collecting 5 pieces of test pieces each having a width of 25 mm and a length of 300 mm from each mesh woven fabric from each sample in the vertical direction and the horizontal direction. It was obtained by performing an evaluation at a span of 200 mm and a tensile speed of 200 mm / min in accordance with the tensile strength and elongation rate A method of JIS L1096 (1999) “General Textile Testing Method” using an autograph strength test apparatus. Average value.

  Moreover, the crack generation load and the bending strength of the composite structure for buildings were evaluated as follows. First, mortar was poured into a 250 × 50 × 20 mm mold. When driving mortar, sample No. 1-No. 5, no. 8-No. No. 10 has a driving thickness of 2 mm, sample no. In No. 6, the driving thickness is 4 mm. In No. 7, the casting thickness was 8 mm. Thereafter, one mesh-like woven fabric was placed on each of the uncured mortar poured, and the mortar was further poured to form a specimen having a thickness of 20 mm. The specimen was cured for 28 days in a room where the temperature and humidity were controlled at 20 ° C. and 60% RH. A bending test was performed on the specimens with the ages 28 days thus cured for 28 days and the specimens after being immersed in warm water for 10 days at 70 ° C. from the ages 28 days. The measurement of the bending test was performed at a loading speed of 2 mm / min with a center loading method with a distance of 200 mm between fulcrums with the mold surface (net burying surface) facing downward. The number of test specimens subjected to the test was five per test condition. In Table 1, what is described as a crack generation load indicates the load when a crack is visually generated in the test specimen in the Newton unit during the bending test on the 28th day of material age. Moreover, in Table 1, the measurement result of the bending strength measured about the test body after material age 28th and warm water immersion is shown collectively. The evaluation of the specimen after immersion in warm water is performed as an accelerated test for reproducing the state after a long period of time with respect to the present invention.

  From the above evaluation, as apparent from Table 1, the sample No. of the mesh fabric of the present invention that was tested was used. 1 to sample no. Each of the 14 samples has a tensile strength in the vertical direction in the range of 537 N / 25 mm to 779 N / 25 mm, and the transverse direction in the range of 560 N / 25 mm to 827 N / 25 mm, all of which are at least 500 N / 25 mm. There was found.

  Sample No. of a composite structure of a building formed by using the tested mesh fabric of the present invention. 1 to sample no. Each of the 10 samples shows a high value of 270 N even if the cracking load is small, and 312 N if the load is large, and the bending strength is within the range of 5.9 MPa to 8.4 MPa on the 28th day of the age, and immersed in 70 ° C. hot water 10 The value after 5.9 MPa to 8.3 MPa was found to be a sufficiently high value.

  Sample No. 11 to sample no. In each of the 14 samples, the yarn constituting the mesh-like woven fabric is 0.002 to 0.2 in terms of mass percentage with respect to the yarn by a compound containing any one of glycidyl group, amino group, and ureido group. %, The crack generation load is even higher from 349N to 377N, and the bending strength is within the range of 8.8 MPa to 9.5 MPa on the 28th day of the age, 70 ° C. The bending strength after 10 days of hot water immersion was a value in the range of 8.6 MPa to 9.3 MPa, and it was found that a higher bending strength was exhibited.

  [Comparative Example] Next, as a comparative example for a composite structure for a building, a part of the procedure was changed according to the same procedure as in the example of the present invention. 21-No. Each of the 26 samples was prepared. Specifically, warp yarns and weft yarns made of alkali-resistant glass fibers having the same composition as in the examples were prepared. 21 and no. About No. 22, it plain-woven with the space | interval shown in Table 2, and each resin shown in Table 2 was apply | coated by the dipping method. Next, the plain woven fabric impregnated with each resin was dried and solidified to prepare a mesh-shaped woven fabric. In addition, sample No. 23-No. For No. 26, a mesh fabric was produced in the same manner as in the example. Using the mesh fabric thus obtained and the mortar shown in Table 2, a series of evaluations similar to the examples were performed. Sample No. For No. 25, after pouring the mortar into a 250 × 50 × 20 mm mold so as to have a thickness of 10 mm, by placing one mesh fabric on the mortar, the cover thickness of the mesh fabric is 50%. Sample No. For No. 26, after pouring to a thickness of 16 mm, one sheet of the mesh fabric was placed on the mortar, so that a bending test specimen was prepared so that the cover thickness of the mesh fabric was 80%. .

  As a result of the evaluation, sample No. 21, no. For sample No. 22, sample no. In spite of being a mesh-like woven fabric composed of the same warp yarn and weft spacing as in No. 1, the resin is adhered by the dipping method, so that the compatibility with the mortar is poor and the adhesion with the mortar is poor. No. Compared to 1, the cracking load was low and the bending strength was low. Sample No. For sample No. 23, sample No. Despite the use of the same mesh-like woven fabric as in Example 1, the unit mass volume of the mortar is smaller than 1.0 and the bending strength of the mortar is lower than 2.0 MPa. Compared to 1, the cracking load and bending strength were low. Sample No. of Comparative Example For sample No. 24, sample No. In spite of using the same mesh-like woven fabric as 1, the unit mass volume of the mortar is a value of 2.0 which is larger than 1.5, and the bending strength of the mortar is higher than 4.0 MPa. However, the reinforcing efficiency was poor with 1.7 times the bending strength of only mortar (2.6 for Sample No. 1 in the example). In addition, sample No. 25, and no. For sample No. 26, sample No. Despite the use of the same mesh fabric as in No. 1, the mesh fabric is embedded at a position where the cover thickness of the mesh fabric exceeds 40% of the thickness of the mortar layer. The intensity was low.

  As described above, the mesh-like woven fabric of the present invention has a sufficiently high strength, and the composite structure for a building constructed by using this mesh-like woven fabric together with a predetermined mortar has a mesh shape. By properly utilizing the high tensile strength of the fabric, it has a long-term stability not only at the beginning of construction but also at the end of construction in terms of mechanical strength, and is a composite structure for buildings that is less prone to structural defects such as cracks. It became clear to become a body.

The partial top view of the mesh-shaped textile fabric of this invention.

Explanation of symbols

10 Mesh-like woven fabric 2 Weft yarn 3 Warp yarn 5 Mesh body 21, 22 Weft yarn group 30 Warp yarn group W1, W2, W3, W4, W5, W6, W7 Weft yarn group V1, V2, V3, V4, V5, V6 Thread set K1-K42 Eye stop (intersection)

Claims (7)

  A group of warp yarns formed by regularly arranging a set of a plurality of warp yarns including one yarn or a set of two or more yarns, and a plurality of sets consisting of one yarn or a set of two or more yarns A set of weft yarns arranged regularly, and a set of warp yarns and a set of weft yarns of a mesh body formed by adhering the weft yarn groups adjacently and crossing and fixing with the warp yarn groups A mesh-like woven fabric characterized in that a crossing point of is coated with a hot-melt type resin.   The mesh-shaped woven fabric according to claim 1, wherein the tensile strength according to JIS L1096 (1999) in the vertical direction and the horizontal direction is 500 N / 25 mm or more.   A compound containing any one or more of a glycidyl group, an amino group, and a ureido group is adhered to the surface of the yarn in an amount of 0.002 to 0.2% in terms of mass percentage. Item 3. The mesh fabric according to item 1 or 2. A composite structure for a building made of mesh fabric and mortar,
The mesh fabric is the mesh fabric according to claim 1 or 2, wherein the mortar has a bending strength of 2.0 to 4.0 MPa according to JIS R5201 (1997) and a unit according to JIS A1171 (2000). A composite structure for a building having a volumetric mass of 1.0 to 1.5.   The composite structure for a building according to claim 4, wherein the mesh-shaped woven fabric is affixed on the surface of the mortar layer, or is embedded in a mortar layer having a cover thickness. .   6. The composite structure for buildings according to claim 5, wherein the cover thickness is a thickness dimension not exceeding 40% with respect to the thickness dimension of the mortar layer.   The composite structure for a building according to any one of claims 4 to 6, which is a wall material, a floor material, a ceiling material, or a unit material.

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