JP3992147B2 - Repair method and structure of existing roof - Google Patents

Description

  The present invention relates to a repair method and a repair structure of an existing roof, and particularly to a repair method and a repair structure of a roof that has already been built and has deteriorated over time.

When a building is demolished and a new building is newly built, a huge amount of building waste is produced. In recent years, there has been a strong demand for environmental measures to prevent such building waste. Even if only the roof is rebuilt, a huge amount of construction waste is produced. Also, during the new construction, it was a matter of course that the building could not be used, which was inconvenient.
JP 2002-206315 A JP 2002-293978 A

  An object of the present invention is to make it possible to use such a building even during renovation without generating such building waste.

  In order to achieve the above object, according to the present invention, a thin fiber cloth is laid on the surface of an existing roof, and a waterproof upper layer resin that can be impregnated into the cloth is further applied on the laid cloth. At the same time, the cloth was impregnated with the upper layer resin, and by impregnating the upper layer resin, the cloth was cured and the strength was improved when the resin was dried. As a result, the existing roof can be used as it is, and the waterproofness and strength of the roof can be improved, no building waste is produced, and the existing roof is not removed. Can do.

  In order to reduce the upper layer resin 3 or the lower layer resin 1 as much as possible, the cloth 2 having a small impregnation amount of the upper layer resin 3 or the lower layer resin 1 was used. This cloth 2 has closed cells 14 inside, and the amount of impregnation of the upper layer resin 3 or the lower layer resin 1 is reduced. The cloth 2 does not have cushioning properties like urethane foam. Since the bubbles in the urethane foam are not independent, the upper layer resin 3 or the lower layer resin 1 easily penetrates.

(1) Roof renovation method The roof to be refurbished is made of slate, asbestos (asbestos), asbestos slate, metal, pottery, plastic, etc., and the shape is plate, tile, grass, corrugated, flat, stepped type. There are various types of roofs, such as roofs without steps, and roofs such as tiles, folded plates, and rods. The present invention is optimal for slate roof refurbishment.
The method of repairing the roof consists of the following steps.
(Process A) The surface of the roof R supported by the steel frame T or the like is cleaned.
(Step B) On the surface of the cleaned roof R, a waterproof and liquid lower layer resin 1 capable of impregnating the cloth 2 and the fiber sheet 5 is applied (FIG. 1).
(Step C) A thin fiber sheet 5 is laid on the surface of the roof R to which the lower layer resin 1 is applied.
(Process D) A fiber cloth 2 is laid on the thin fiber sheet 5 (FIG. 2).
(Step E) A waterproof and liquid upper layer resin 3 that can be impregnated in the cloth 2 is further applied on the spread cloth 2 (FIG. 3).
(Step F) A weather resistant surface layer resin 4 is applied to the surface of the cloth 2 impregnated with the upper layer resin 3 (FIG. 4).
In addition, the cleaning of the surface of the roof R in the above (Step A) can be omitted.

  What supports the roof R in the said process A may be a steel frame T, a reinforced concrete, a building block, etc., and a structure may be a pair fireproof structure or a semi-fireproof structure. Cleaning of the roof R involves sweeping, washing with water, washing with detergent, washing with a jet of water, washing machine, scrubber or electric brush, and the surface of the roof R by hitting dry ice particles against the surface of the roof R. Either dry ice blast cleaning or the like, or a combination of these may be used.

  This cleaning includes a drying step, and this drying may be any of natural drying, sunlight, a heater, a fan, a blower, or the like, or a combination thereof. This cleaning process is not necessary for cleaning without using water, and when no water is used with the above-mentioned scrubber or electric brush, the drying process is not required for sweeping and dry ice blasting.

  The cleaning can be omitted. In this case, the dust on the surface of the roof R and the exfoliation of the material of the roof R are not removed, but are encapsulated with the lower layer resin 1 or the upper layer resin 3. Thereby, it is possible to prevent the dust on the surface of the roof R and the exfoliation of the material of the roof R from being scattered. When the material of this roof R is made of harmful materials such as asbestos, asbestos slate, heavy metal, vinyl chloride resin, etc., it is possible to prevent such exfoliation from scattering and adversely affect human health and the environment. There is nothing.

  Containment / enclosure / scattering prevention / breakage prevention / reinforcement / protection of harmful substances such as asbestos, roofs of buildings / facilities, roofs of buildings / facilities, ceilings / floors of buildings / facilities Top / bottom / slope, building / facility vertical / slope wall, horizontal / vertical / slope underground / ground earth pipe / pipe / electric pole / iron pole / pillar / tower / gate / bridge / road / Applicable to the outer surface / inner surface of a structure such as a tunnel.

  According to the experiment, when such cleaning is not performed, the strength of the existing roof repaired by the above process is not decreased or is only a few percent compared to the case where cleaning is performed, and there is no problem in strength. It was. If cleaning is not performed in this way, harmful asbestos can be contained by the above steps, and the present invention can be regarded as an asbestos containment method and a containment structure contained by the asbestos containment method.

  The cloth 2 of the step C is laid before the lower layer resin 1 of the step B is dried, and the lower layer resin 1 is also impregnated into the cloth 2. The lower layer resin 1 is the same as the upper layer resin 3, but may be different. The lower layer resin 1 and the upper layer resin 3 penetrate and mix with each other. For example, if both are the same properties, such as aqueous or oily, they are mixed.

  Note that the lower layer resin 1 and the upper layer resin 3 do not penetrate each other and do not need to be mixed as in the case of the surface layer resin 4 and the upper layer resin 3 described later. Further, either the lower layer resin 1 or the upper layer resin 3 may not be applied. The cloth 2 may be laid after the lower layer resin 1 is dried. The drying time in this case is several hours and is completely dried.

  The coating amount of the upper layer resin 3 or the coating amount of the lower layer resin 1 and the upper layer resin 3 in the step D is the same as the thickness of the cloth 2, or less than this thickness or a fraction of this thickness, or this thickness. It is applied in an amount exceeding or several times this thickness. The upper layer resin 3 or the lower layer resin 1 and the upper layer resin 3 are applied in such an amount that the cloth 2 is sufficiently or partially soaked and sufficiently impregnated. The application volume of the upper layer resin 3 or the lower layer resin 1 and the upper layer resin 3 is the same or less than the volume of the cloth 2 as described later.

  The upper resin 3 in the step D is impregnated until reaching the surface of the roof R on the lower surface of the cloth 2. When this upper layer resin 3 is dried, the cloth 2 is cured and the strength of the modified roof is improved. Furthermore, the cloth 2 is bonded to the roof R by the upper layer resin 3, thereby further improving the strength of the modified roof.

  The surface resin 4 is not mixed with the upper resin 3. This is because the material of the surface resin 4 is different from that of the upper resin 3. For example, one is aqueous and the other is oily. In addition, even if the upper layer resin 3 and the surface layer resin 4 have the same property or the same material, such as the same oiliness or the same aqueous property, they do not mix if the surface layer resin is applied after the upper layer resin is dried. The surface layer resin 4 may not be applied.

(2) Material of the upper layer resin 3 and the lower layer resin 1 The material of the upper layer resin 3 and the lower layer resin 1 is thermosetting or thermoplastic, or non-foaming or foaming, and waterproof. For example, unsaturated polyester resin, saturated polyester resin, unsaturated / saturated acrylic resin, alkyd resin, phenol resin, epoxy resin, melamine resin, urea resin, polyurethane, polyethylene, polyvinyl chloride, polystyrene, polypropylene, methacrylic resin Polycarbonate, polyamide, polyacetal, fluororesin, and a mixture thereof, nylon resin, epoxy resin, and polyester resin are desirable, and unsaturated polyester resin is more desirable.

  These upper layer resin 3 and lower layer resin 1 are liquid, sol-like or gel-like at normal temperature, and those which can be sufficiently impregnated into the cloth 2 are selected. The amount of impregnation of the upper layer resin 3 (or / and the lower layer resin 1) with respect to the cloth 2 is 15% to 500% of the volume of the cloth 2, desirably 25% to 250%, more desirably 35% to 100% (same volume), Desirably 45% to 75%, and more desirably 50% to 60%, for example 55%, and the upper layer resin 3 and / or the lower layer resin 1 in an amount less than or greater than the volume of the cloth 2 is applied and impregnated. .

  By this impregnation, the upper layer resin 3 containing the cloth 2 is strengthened and the strength of the roof R can be increased. Since the cloth 2 has closed cells 14 to be described later, the amount of impregnation of the upper layer resin 3 (or / and the lower layer resin 1) may be small. Even if the impregnation amount of the upper layer resin 3 (or / and the lower layer resin 1) is less than the volume of the cloth 2, the upper layer resin 3 (or / and the lower layer resin 1) is equivalent to the volume of the cloth 2 by the closed cells 14 of the cloth 2. Or it can be made into the same state as impregnating about equal or more, and the application volume of the upper layer resin 3 (or / and the lower layer resin 1) may be smaller than the volume of the cloth 2. Of course, the coating volume of the upper layer resin 3 (or / and the lower layer resin 1) may be larger than the volume of the cloth 2.

  The coating amount and impregnation amount of the upper layer resin 3 and the lower layer resin 1 are 0 per 1 mm (millimeter) thickness of the cloth 2 and 1 m 2 (square meter) at a density (= specific gravity) of 1.00 to 1.20 g / ml. 0.3 to 4.0 kg (kilogram), preferably 1.0 to 3.0 kg, more preferably 1.15 to 2.3 kg, and even more preferably 1.5 to 2.0 kg. By this impregnation, the upper layer resin 3 containing the cloth 2 is strengthened and the strength of the roof R can be increased.

  The upper layer resin 3 and the lower layer resin 1 are oily or aqueous, but the oily is better waterproof. Moreover, even if it is aqueous, if the surface resin 4 is oily, the waterproof property of the modified roof is achieved. In some cases, a curing agent and a colorant are added to the upper layer resin 3 and the lower layer resin 1. Specific products include Iupica 4183APT and Iupica 4183PT (Nippon Iupika Co., Ltd. product).

  Further, the density (= specific gravity) of the upper layer resin 3 and the lower layer resin 1 is 1.00 to 1.20 g / ml, desirably 1.08 to 1.14 g / ml, and more desirably 1.10 to 1.12. The viscosity is from 1.0 to 9.0 dPa · S, preferably from 1.5 to 6.0 dPa · S, more preferably from 2.0 to 4.5 dPa · S, and the variation is from 1.0 to 4. 0, desirably 1.5 to 3.0, acid value is 10 to 25 mg KOH / g, desirably 12 to 20 mg KOH / g, and gel time, which is the time until solidification, is 5 to 75 minutes, desirably 9 to 50 minutes, more desirably 15 to 30 minutes.

  In order to apply the foamable or non-foamable resin composition liquid of the upper layer resin 3 or the lower layer resin 1 to the cloth 2 for impregnation, in addition to application with a brush or roller, spraying with a spray, generally known saturators, coaters, etc. The method is applied. By applying the lower layer resin 1, the adhesion / sealing property of the cloth 2 to the surface of the roof R can be improved.

  Since the upper layer resin 3 and the lower layer resin 1 have the same component and the same material, the mutual permeability / mutual affinity between the upper layer resin 3 and the lower layer resin 1 is improved, and mismatch between the upper layer resin 3 and the lower layer resin 1 occurs. A surface does not arise and the strength of the upper layer resin 3 and the lower layer resin 1 can be improved.

(3) Material of surface layer resin 4 The material of the surface layer resin 4 is thermosetting or thermoplastic, or non-foaming or foaming, and waterproof. For example, unsaturated polyester resin, saturated polyester resin, unsaturated / saturated acrylic resin, alkyd resin, phenol resin, epoxy resin, melamine resin, urea resin, polyurethane, polyethylene, polyvinyl chloride, polystyrene, polypropylene, methacrylic resin Polycarbonate, polyamide, polyacetal, fluororesin, and a mixture thereof, nylon resin, epoxy resin, and polyester resin are desirable, and unsaturated polyester resin is more desirable. Further, any of ortho, isophthalic acid and bisphenol may be used.

  These surface layer resins 4 are liquid, sol form or gel form at normal temperature, and are oily or aqueous. However, the oily resin is more waterproof and the resin not mixed with the upper resin 3 is selected. The surface layer resin 4 is excellent in weather resistance and has good durability against long-term direct sunlight, long-term rainfall / snow / acid rain, long-term strong wind, and the like. Since the surface resin 4 has good weather resistance, deterioration such as discoloration / decrease in waterproofness / degeneration is unlikely to occur, and damage such as crack / scratch / dirt is unlikely to occur, and the cloth 2 impregnated with the upper resin 3 and / or the lower resin 1 is impregnated. Is protected over a long period of time, and the fabric 2 impregnated with the upper layer resin 3 and / or the lower layer resin 1 is prevented from being deteriorated or damaged.

  The viscosity of the surface layer resin 4 when applied using an air gun is 6 to 27 poise, preferably 9 to 18 poise, more preferably 12 to 15 poise, and the throttling degree is 3.0 to 9.0. It is preferably 4.0 to 7.5, more preferably 4.5 to 6.0, and the gel time, which is the time until solidification, is 7.5 to 45 minutes, preferably 10 to 30 minutes, more preferably 15-25 minutes. The surface layer resin 4 may not be applied depending on circumstances.

  The viscosity of the surface layer resin 4 when applied by brush coating or roller coating is 12 to 36 poise, preferably 18 to 27 poise, more preferably 21 to 24 poise, and the variation is 3.5 to 7.5. Yes, preferably 4.5 to 6.5, more preferably 5.0 to 6.0, and the gel time, which is the time to solidify, is 7.5 to 45 minutes, preferably 10 to 30 minutes, more Desirably 15 to 25 minutes. The surface layer resin 4 may not be applied depending on circumstances.

  In order to apply and impregnate the foamable or non-foamable resin composition liquid of the surface layer resin 4 on the surface of the upper layer resin 3 applied / impregnated on the cloth 2, application by brush or roller, spraying by spraying, etc. are performed. . In some cases, a curing agent and a colorant are added to the surface layer resin 4. Specific examples of such products include Iupica UG-510 series, Iupica 4183 (Nippon Iupika Co., Ltd. product), and Gelcoat (Koshin Chemical Co., Ltd. product).

  The material of the upper layer resin 3, the lower layer resin 1 and / or the surface layer resin 4 is incombustible or incombustible. In particular, when the surface resin 4 is made flame retardant, the upper resin 3 and the lower resin 1 can be protected from fire and other deterioration or damage.

  The upper resin 3 and the lower resin 1 may be aqueous, and the surface resin 4 may be oily. Thereby, after washing the surface of the roof R with water, the upper layer resin 3 or the lower layer resin 1 can be applied immediately without waiting for drying or by omitting the drying step. The upper layer resin 3 and the lower layer resin 1 may be oily, and the surface layer resin 4 may be aqueous.

(4) Material of cloth 2 The cloth 2 is a woven or non-woven cloth or mat, and has no cushioning property. This cloth 2 is made of synthetic resin such as polyethylene terephthalate or nylon, basalt fiber, glass fiber, boron fiber, silicon carbide fiber, alumina fiber, carbon fiber, aramid fiber, steel fiber, etc. Is molded from a synthetic resin of polyethylene terephthalate or nylon. Even if the foamed sponge-like material is impregnated with the upper layer resin 3 and the lower layer resin 1, it is avoided because of its low strength, but can be used in some cases. The upper layer resin 3 sufficiently enters the cloth 2 and the upper layer resin 3 incorporating the cloth 2 becomes strong, and the strength of the roof R can be increased.

  The filament yarn of the nonwoven fabric formed from the filament yarn and the entangled portion thereof are covered with a thermoplastic resin or a thermosetting resin that fills a part of the internal void of the nonwoven fabric, and the remainder of the internal void is the upper layer resin 3 and / or A resin impregnation permissible gap that enables impregnation of the lower layer resin 1 is formed, and the bubbles encapsulated in the thermosetting resin foam or the thermoplastic resin foam are encapsulated with the thermoplastic resin film or the thermosetting resin film. It is a closed cell, and the said resin impregnation permissible gap occupies 20 to 40% by volume of the entire volume of the cloth 2, and the bulk density is 0.03 to 0.06 g / cm 3.

  In FIG. 5, 11 is a filament yarn of a synthetic fiber, 12 is an entangled portion of the filament yarn 11, 13 is a thermoplastic resin foam or a thermosetting resin foam covering the filament yarn 1 and the entangled portion 12. In the foam 13, a large number of closed cells 14 encapsulated with a thermoplastic resin film or a thermosetting resin film are encapsulated. Reference numeral 15 denotes a gap formed between the foams 13, and the gap 15 is impregnated with a thermosetting resin solution during secondary processing.

  The filament yarn constituting the nonwoven fabric of the present invention includes ordinary synthetic fibers such as filament yarns formed from thermoplastic synthetic resins such as polyester-based, polyamide-based, polyacrylic-based, polyvinyl chloride-based, and polyolefin-based resins, and polyphenol-based fibers. Filament yarns and inorganic filament yarns formed from metal, carbon, titanium, glass, basalt, etc. are preferred, but filament yarns formed from polyethylene terephthalate and nylon are particularly preferred. The filament has a single fiber thickness of 0.5 to 15 denier, preferably 1 to 5 denier.

  The nonwoven fabric is called a spunbonded fabric in which filament yarns are randomly arranged and overlapped, and needle patching or resin processing is performed as necessary. The thickness and weight per unit area of the nonwoven fabric are not particularly limited, but a thickness of 2 to 6 mm and a weight per unit area of 50 to 170 g / m @ 2 are preferred in order to suitably achieve the present invention.

  The thermosetting resin or thermoplastic resin coated on the filament yarn of the nonwoven fabric includes polyvinyl acetate / ethylene copolymer, polyvinyl acetate / ethylene / acrylic terpolymer, polyacrylate, polyurethane, and methoxylation. Polyamide, polyepoxide, unsaturated polyester, etc., and mixtures of these resins are exemplified, but in particular, polyvinyl acetate / ethylene copolymer and vinyl acetate / ethylene / acrylic terpolymer are resins during secondary processing. This is preferable because it has good permeability to the impregnating solvent and flexibility of the obtained cloth 2.

  The polyvinyl acetate / ethylene copolymer has a copolymerization ratio of vinyl acetate / ethylene = 60/40 to 85/15 (molar ratio), preferably having a relatively low molecular weight. It is preferable that the embedded property of the film is a tensile strength of 10 kg / cm 3, an elongation of 2200%, and a glass transition point of about 15 ° C. below zero.

The closed cells 14 encapsulated in the thermoplastic resin foam or the thermosetting resin foam are formed by the expansion of foamable thermoplastic resin particles described later, and the average diameter thereof is 45 to 135. preferably micrometers in average diameter smaller 45 thickness of the fabric 2 is less than microns, a specific gravity increases, and decreases the resin impregnated acceptable porosity, high rigidity of reinforced plastic and lightweight (reinforced resin) not obtained, the average is likely to occur defoaming phenomenon closed cells to exceed 135 micrometers in diameter contrary, undesirable compressive elastic recovery property is lowered.

  When the above-mentioned closed cells 14 increase and the specific gravity of the fabric 2 becomes less than 0.03, the resin impregnation allowable gap described later is insufficient, and conversely, the closed cells decrease and the specific gravity of the fabric 2 exceeds 0.06. The above-mentioned resin impregnation allowable gap becomes excessive, and none can be used for the purpose of the present invention.

An inorganic hollow sphere can be mixed in the thermoplastic resin foam or the thermosetting resin foam. Examples of the inorganic hollow sphere include shirasu paroon, glass paloon, mullite and glass composite, etc. Among them, shirasu paloon has particularly good dimensional stability at the time of secondary processing and threadability of reinforced plastic (reinforced resin). Is preferred. The average particle size of 60-80 micrometers of the inorganic hollow sphere, the particle size range is preferably 10 to 200 micrometers.

  The cloth 2 has a void that is impregnated with a thermosetting resin solution or a thermosetting resin solution during secondary processing, and this void is referred to as a resin impregnation allowable void. This resin-impregnated permissible gap is not the closed cell 14 of the above-mentioned thermosetting resin foam, or the closed cell 14 is broken and partially communicated, but three-dimensionally between the resin foams, and It is a communication structure formed so as to communicate with the nonwoven fabric surface. The percentage of the volume of the resin-impregnated allowable void relative to the total volume of the fabric 2 is the resin-impregnated allowable void ratio (hereinafter referred to as void ratio), and is measured and calculated by the following method.

  Read the increase (ncc) of the water level from the reference line when the sample with a width of 0.7 cm and a length of 40 cm is immersed in a vial containing water up to the reference line (40 cc) until the sample is immersed in water. The amount of decrease (mcc) in the water surface from the reference line when the sample was taken out with the sample immersed in water for 10 seconds was read, and the following equation porosity (%) = {m / (m + n)} Calculated as x100.

The porosity of the cloth 2 is 20 to 40%, and if the porosity is less than 20%, the texture of the cloth 2 becomes hard and the amount of the secondary processing resin impregnation becomes too low, resulting in rigid polyurethane foam, rigid polyvinyl chloride. It approximates unimpregnated type behavior, such as a plate, bending elasticity of the reinforcing flop Rasuchitsuku (reinforced resin), flexural strength, impact resistance undesirably decreases. On the other hand, if the porosity exceeds 40%, the compressive elasticity recovery property of the fabric 2 is lowered, the volume is reduced during storage, and the amount of resin impregnation during the secondary processing is increased and becomes heavy, which is uneconomical.

  As the gap of the cloth 2, holes of a predetermined size may be formed at a predetermined area ratio by punching. For example, one hole having a diameter of about 0.5 to 2 mm per 0.25 to 4 cm <2>, preferably one hole having a diameter of about 0.75 to 1.5 mm per 0.5 to 2 cm <2>, more preferably a diameter One hole of about 1 mm may be formed per 1 cm 2. Such holes facilitate the penetration of the lower layer resin 1 and / or the upper layer resin 3.

  The manufacturing method of this cloth 2 is as follows. After impregnating the non-woven fabric with the foamable resin composition liquid containing the thermosetting street fat, the foam is dried and the resin is crosslinked and cured simultaneously. The foamable resin composition liquid is the above-mentioned thermosetting resin foaming thermoplastic resin particle, thermosetting resin foaming thermoplastic resin particle, thermoplastic resin foaming thermosetting resin particle, or thermosetting resin foaming thermosetting. The emulsion is composed of a conductive resin particle, a thickener, and a PH regulator (for example, aqueous ammonia).

  The foamable thermoplastic resin particles and the like are, for example, granular materials in which a gas such as butane and imptan is encapsulated in a shell material such as polyvinylidene chloride / allylonitrile copolymer (for example, trade name “Micropearl” manufactured by Matsumoto Yushi Seiyaku Co., Ltd.). ]) And other commonly used foamable granular materials that are commonly used. As for the compounding quantity of an expandable thermoplastic resin particle, 75-65 weight part is preferable with respect to 25-35 weight part of polyvinyl acetate ethylene copolymers, for example.

  When the blending amount of the foamable thermoplastic resin particles and the like exceeds 75 parts by weight, the resin falls off, and the suitability for molding becomes worse, and when it is less than 65 parts by weight, the porosity is lowered, which is not preferable. In addition, when mix | blending the said inorganic medium body with a foamable resin composition liquid, the compounding quantity is 2 with respect to 100 weight part of mixtures of a polyvinyl acetate ethylene copolymer, a foamable thermoplastic resin particle, etc. ˜15 parts by weight is suitable. An appropriate amount of acrylic or other known thickener is blended.

  In order to apply the foamable or non-foamable resin composition liquid of the upper layer resin 3 or the lower layer resin 1 to the cloth 2 for impregnation, in addition to application with a brush or roller, spraying with a spray, generally known saturators, coaters, etc. The method is applied. The impregnation amount of the composition liquid is appropriately 50 to 110 parts by weight with respect to 100 parts by weight of the cloth 2, and if it is less than 50 parts by weight, the target thickness cannot be maintained and a predetermined gap is obtained. If the cloth 2 exceeds 110 parts by weight, the texture of the cloth 2 becomes hard, the impregnation amount of the thermosetting resin liquid during the secondary processing is reduced, the rigidity is lowered, and further economically Absent. The upper layer resin 3 sufficiently enters the voids or the perforated holes, and the upper layer resin 3 incorporating the cloth 2 becomes strong and the strength of the roof R can be increased.

  The amount of impregnation is adjusted by the resin concentration, viscosity, dog lance, roll coater rotation ratio, mangle squeezing ratio, etc. of the foamable or non-foamable resin composition liquid. In order to heat the cloth 2 having a predetermined impregnation amount, an ordinary large blower, hot air blower, steam dryer, infrared heater, or other known dryers can be used.

  The cloth 2 having the above structure usually has a thickness of 0.1 to 20 mm, preferably 0.2 to 10 mm, more preferably 0.5 to 5 mm, still more preferably 1 to 3 mm, and a weight per unit area of 5 to 900 g / m2, preferably 10 to 450 g / m2, more preferably 25 to 270 g / m2, and even more preferably 50 to 170 g / m2, but is not limited to the above range. The cloth 2 may be perforated by punching or the like.

  The cloth 2 of the present invention is lightweight and has good compression elastic recovery, and is a conventional secondary processing method such as a hand lay-up method, a spray-up method, an indi- sion molding method, an inexi Deing method and pultrusion method can be easily applied.

The fabric 2 may be a woven fabric, and the weaving method may be any of plain weave, twill weave, and soot weave. However, the material must be easily impregnated with the upper resin 3 and / or the lower resin 1. If not sufficiently impregnated, the strength of the fabric 2 impregnated with the upper resin 3 and / or the lower resin 1 is not sufficiently exhibited. As a specific product of the cloth 2, the T series and MC type of Iupikamat (product of Nippon Iupika Co., Ltd.) are preferable.

(5) Shape of Cloth 2 FIG. 6 shows the shape of the cloth 2 without the cushioning property. On the upper surface / surface of the fabric 2, a plurality of lines (lines) 6 are drawn in the vertical direction or the horizontal direction at predetermined intervals. A plurality of holes 7 are punched along the line 6 at predetermined intervals. When the cloth 2 is laid on the roof R, the projection 7 protruding from the surface / upper surface of the roof R is inserted / penetrated into the hole 7. Thereby, the protrusion S of the roof R does not become an obstacle in the repair work of the roof R, and the strength of the repair roof does not decrease at the protrusion S.

  The line 6 is formed by various methods such as drawing with a water-based or oil-based pen, printing in advance, and sewing or weaving a thick thread having a color different from that of the cloth 2. The line 6 is a vertical parallel line, but may be a vertical and horizontal parallel line / a grid line / a grid line. The line 6 may have a shape such as a dotted line, a broken line, or a point with a large interval.

  The said line 6 is formed in the direction along the inclination of the roof R, such as asbestos slate, or the wave line direction of the roof R (the above-mentioned vertical direction, the same applies hereinafter), and the number of lines 6 is 1 to 1 per meter. 500, desirably 2 to 200, more desirably 2 to 100, still more desirably 3 to 50, and even more desirably 4 to 10 are formed. The distance between the lines 6 is 1000 to 2 mm, desirably 500 to 5 mm, more desirably 500 to 10 mm, still more desirably 350 to 20 mm, and even more desirably 350 to 100 mm, such as 350 to 250 mm.

  In some cases, the line 6 is also formed in a direction orthogonal to the inclination of the roof R, such as asbestos slate, or in the wave traveling direction of the roof R (the horizontal direction described above; the same applies hereinafter). The number and interval of the horizontal lines 6 are the same as those of the vertical lines. The distance between the lines 6 is equal to or smaller than the distance between the protrusions S on the roof R, and the number of the lines 6 is larger than the number of lines of the protrusions S. Thereby, the optimal line 6 can be selected for the protrusions S having various intervals. This line 6 can be omitted in some cases.

  The protrusion S includes bolts and nuts, hook bolt ends, channel bolt ends, pipe bolt ends, lightning bolt ends, U bolts, J bolts, nails, iron seats, felt seats, packings, caps, Other protrusions. The hole 7 may be formed only when the protrusion S protrudes more than a predetermined length. When the protrusion S does not protrude more than a predetermined length, such as a nail, the hole 7 may not be formed. For example, the protrusion amount of the protrusion is 0 to 500% of the thickness of the cloth 2, desirably 0 to 250%, more desirably 0 to 100%, further desirably 0 to 50%, and even more desirably 0 to 0%. If it is 25%, the hole 7 is not formed.

  The hole 7 is formed by press punching or the like. When the cloth 2 is a nonwoven fabric, the holes 7 may be formed from the beginning when the nonwoven fabric is manufactured in advance. The holes 7 may be formed at the repair site of the roof R in accordance with the interval between the protrusions S. The holes 7 are formed at predetermined intervals along the line 6. When there is a horizontal line 6, a hole 7 is formed at the intersection of the vertical line 6 and the horizontal line 6.

  In the example of FIG. 6, the vertical lines 6 are formed in parallel at 312 mm intervals, the horizontal lines 6 are not formed, the holes 7 are formed along the lines 6 at 800 mm intervals, and the holes 7 are formed in the vertical direction and It is formed at equal intervals along the horizontal direction. This cloth 2 is 1800 mm long and 1000 mm wide.

FIG. 7 shows a cross section of the roof R to be repaired. This roof R is a corrugated asbestos slate roof. The protrusions S (bolts and the like) of the roof R are attached at intervals of 260 mm in the horizontal direction and at intervals of 800 mm in the vertical direction. Since the roof R is corrugated and the cloth 2 is laid along the corrugation in the lateral direction, the holes 7 of the cloth 2 are spaced 312 mm apart in the lateral direction, and the protrusions S are spaced by 260 mm apart in the lateral direction. Can reliably insert all the protrusions S. The space | interval of the hole 7 of the cloth 2 is set to 105-135% of the linear space | interval of the protrusion S of the corrugated roof R, Preferably it is 110-130%, More preferably, it is 115-125%, for example, 120%.

  This hole 7 may be formed with a cut of several centimeters outward. If there is this break, it can respond to the change in the thickness of the protrusion S. The diameter of the hole 7 is 3 to 100 mm, desirably 5 to 75 mm, more desirably 10 to 50 mm, and further desirably 20 to 30 mm.

  FIG. 8 shows another example of the hole 7. Such a hole 7 may be a temporary hole formed by a plurality of concentric annular perforations, instead of a through hole. Such annular perforation holes 7 may be formed in advance with a plurality of types of intervals / sizes / thicknesses in accordance with the types of intervals and sizes / thicknesses of the protrusions S. Thereby, only the hole 7 of the circular perforation which matches the protrusion S of the roof to be repaired can be selected and opened at the site to repair the roof R. The above lines 6 and / or holes 7 are also formed in the fiber sheet 5 described below depending on circumstances.

  The number of concentric circles of the circular perforation may be one or any number. In addition to the perforation, such a temporary hole 7 may be one in which the thickness of the cloth 2 is reduced along the concentric circles, and if the hole 7 can be easily formed, punched or penetrated in a circular shape. Any hole 7 is acceptable. The shape of the hole 7 may be any shape such as a square, a polygon, an ellipse, an ellipse, or a star. The cut may be any shape such as linear, “V” shape, “U” shape, and the like.

(6) Fiber sheet 5
The fiber sheet 5 is laid under the cloth 2. The material of the fiber sheet 5 is made of synthetic resin, aramid fiber, carbon fiber, basalt fiber or glass fiber, and has no cushioning property. Either a non-woven fabric or a woven fabric may be used, and the weaving method may be plain weave, twill weave, or soot weave. When this fiber sheet 5 is stacked under the cloth 2, the strength of the cloth 2 impregnated with the lower layer resin 1 and / or the upper layer resin 3 is greatly increased.

  When pressure is applied to the fabric 2 impregnated with the resin, tensile stress acts on the fiber sheet 5 impregnated with the resin, but the fiber sheet 5 impregnated with the resin is resistant to tensile stress, so that the strength of the repaired roof is improved. To do. Basalt fiber or glass fiber is suitable as a material resistant to tensile stress, and plain weaving is suitable.

The fiber sheet 5 has voids or perforated holes impregnated with the lower layer resin 1 and / or the upper layer resin 3, and the voids or holes occupy 20 to 40% of the volume of the cloth 2 . The thickness is 0.25 to 20 mm, preferably 0.5 to 10 mm, more preferably 0.75 to 6 mm, more preferably 1 to 3 mm, and the weight per unit area is 10 to 900 g / m2, preferably 20 to 450 g / m2. It is preferably 30 to 270 g / m <2>, and more preferably 40 to 170 g / m <2>. The other structure is the same as that of the cloth 2.

  The tensile strength of the fiber sheet 5 is 1500-1700 N (Newton) for plain-woven aramid fiber and carbon fiber, 1400-1540 N (Newton) for plain-woven basalt fiber, and 730-1300 N (Newton) for plain-woven glass fiber. The elongation at this time is 2.7 to 3.0% for aramid fibers and carbon fibers, 2.2 to 2.3% for basalt fibers, and 1.3 to 1.8% for glass fibers.

  The fiber sheet 5 is impregnated with the lower layer resin 1 or / and the upper layer resin 3, but the lower layer resin 1 or the upper layer resin 3 may be applied onto the fiber sheet 5 as described above. . In this case, when the lower layer resin 1 and the upper layer resin 3 are different, it is desirable to apply the same resin as the lower layer resin 1. In addition, the fiber sheet 5 may be laid on the cloth 2 in some cases. Even in this case, the lower layer resin 1 and / or the upper layer resin can be applied to the surface of the fiber sheet 5.

(7) Test results of the repaired roof of the present invention The strength of the repaired roof was enhanced as follows by the repair method and the repair structure of the existing roof of the present invention. In this strength improvement test, corrugated slate roofing material was used, pressure was applied over the direction of the line across the corrugation of the existing corrugated slate roofing material, and the pressure applied until failure was measured. The breaking strength of the existing corrugated slate roofing material before the repair was 4.6 KN (kilonewton), 469.3 kgf, but by applying the repair of the present invention, 8.6 KN (kilonewton), 877.5 kgf (Kilogram force), nearly twice the strength improvement could be achieved, and even if the fiber sheet 5 was omitted, 7.8 KN (kilonewton) and 795.9 kgf (kilogram force) could be achieved.

  Moreover, the following test data was obtained by the test about the adhesive strength with respect to the flat surface of the cloth 2 which the upper layer resin 3 and / or the lower layer resin 1 impregnated. In order to remove the cloth 2 impregnated with the upper layer resin 3 and / or the lower layer resin 1 by the method of repairing an existing roof of the flat slate roofing material and to peel it off, the load is 15.3 kgf / cm 2. Power was needed.

  This is because the cloth 2 impregnated with the upper layer resin 3 and / or the lower layer resin 1 is not peeled off from the slate roof surface, but the slate roof is adhered to the cloth 2 impregnated with the upper layer resin 3 and / or the lower layer resin 1. Exfoliation took place until the material was destroyed. That is, the adhesive strength of the cloth 2 impregnated with the upper layer resin 3 and / or the lower layer resin 1 to the slate roofing material was much higher than the strength of the slate roofing material itself.

  In addition, in order to repair a flat concrete material by impregnating the cloth 2 impregnated with the upper resin 3 and / or the lower resin 1 with the method for repairing an existing roof according to the present invention, it is 32.0 kgf / cm 2. The power of was necessary.

  The cloth 2 impregnated with the upper resin 3 and / or the lower resin 1 is not peeled off from the concrete plane, but the concrete material is adhered to the cloth 2 impregnated with the upper resin 3 and / or the lower resin 1 with the concrete plane adhered. Exfoliation was done until it was destroyed. That is, the adhesive strength of the cloth 2 impregnated with the upper layer resin 3 and / or the lower layer resin 1 with respect to the concrete plane was much higher than the strength of the concrete material itself.

  From the above, the following remarkable effects can be achieved by the repair method and the repair structure of the existing roof of the present invention. Since the thickness of the cloth 2 is thin and the specific gravity of the upper layer resin 3 and / or the lower layer resin 1 to be impregnated is light and close to water, not only the resins 1, 3, and 4 but also light fibers in this resin Since the cloth 2 is built in, the weight of the entire repair structure is 1.0 to 1.6 kg / m 2, and the average weight is 1.3 kg / m 2, and the load on the roof is small.

  In addition, since the upper layer resin 3 and / or the lower layer resin 1 is cured quickly, the repair work can be performed in a short period of time. As described above, since the strength of the roof is improved and the adhesive strength to the roof is high, the durability is excellent, durability of 20 years or more, sometimes 25 to 30 years or more is obtained, and the number of repairs can be reduced.

  Furthermore, since the upper layer resin 3 and / or the lower layer resin 1 or the surface layer resin 4 is less slippery than the surface of the roof itself such as a slate roof, the upper layer resin 3 and / or the lower layer resin 1 are less slippery during construction or inspection, and are highly effective in preventing slipping during work. In addition, the upper layer resin 3 and / or the lower layer resin 1 or the surface layer resin 4 is waterproof and has the above-mentioned strength improvement and high adhesive strength, so that it is difficult for water to enter and is effective in improving rain leakage. Even rain leaks are very unlikely.

  Further, in the repair method and the repair structure of the existing roof according to the present invention, the same resin material as the upper layer resin 3 and / or the lower layer resin 1 or the surface layer resin 4 is formed on the lower surface and the upper surface of the cloth 2. Therefore, after repairing the existing roof by the method of repairing an existing roof of the present invention, when several years have passed and the roof is further repaired by the same method, the resins are mixed and joined together, It has good characteristics, and it is possible to add a modified roof firmly. In this case, it is only necessary to clean / wash the surface of the modified roof before adding the modified roof.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the present invention is most suitable for repairing the roof of a large facility such as a factory, a sports facility, or a public facility, but the roof to be repaired is not limited to a slate roof, and may be any roof.

  In addition, the renovation method of the present invention includes an arcade roof, a rooftop surface of a building, a dome-shaped roof, a roof of a prefabricated house, a roof of a wooden house, a roof of a reinforced concrete structure / a rooftop floor In addition to building / facility roofs, etc., buildings / facility rooftops, buildings / facility ceilings / floor top / bottom / slopes, buildings / facility vertical / slope surfaces, horizontal It can also be applied to the outer surface / inner surface of a structure such as / vertical / inclined underground burial / ground soil pipe / pipe / electric pole / iron pole / pillar / tower / gate / bridge / road / tunnel.

  When the lower layer resin 1, the upper layer resin 3 or the surface layer resin 4 is applied to the vertical surface, it may be applied from the top to the bottom. When the cloth 2 is laid, the cloth 2 is temporarily fixed or pinned to the wall surface. Good. Also, when applying the lower layer resin 1, the upper layer resin 3 or the surface layer resin 4 to the lower surface of the horizontal plane, spray with a spray gun or the like, and when laying the cloth 2, select the thin cloth 2, and depending on the adhesiveness of the lower layer resin 1, 2 can be attached to the lower surface.

(8) Effects of other inventions [1] A thin fiber cloth is laid on an existing roof, and a waterproof and liquid upper layer resin that can be impregnated into the cloth is further applied on the laid cloth. At the same time, the cloth is impregnated with the upper layer resin until it reaches the surface of the roof on the lower surface of the cloth, and when the upper layer resin is dried, the cloth is cured and the strength is improved, and the upper layer resin is impregnated. A method for repairing an existing roof, characterized in that a cloth is bonded to the roof. Thereby, the waterproofness and strength of the roof can be improved, no building waste is produced, and the existing roof is not removed, so that the building can be used even during roof repair.

[2] A roof refurbishment structure refurbished by the method for refurbishing an existing roof according to claim 1. Thereby, the waterproofness and strength of the roof can be improved, no building waste is produced, and the existing roof is not removed, so that the building can be used even during roof repair.

[3] The upper layer resin is thermosetting or non-foaming, liquid at room temperature, preferably a nylon resin, an epoxy resin, or a polyester resin, more preferably an unsaturated polyester resin, The impregnation amount for the cloth is 15% to 500%, desirably 25% to 250%, more desirably 35% to 100% (same volume), and further desirably 45% to 75% of the volume of the cloth. To repair existing roofs. By this impregnation with the upper layer resin, the upper layer resin containing the cloth becomes stronger and the strength of the roof can be increased. Further, if the cloth has closed cells, the amount of impregnation of the upper layer resin may be small, and the application volume of the upper layer resin may be smaller than the volume of the cloth.

[4] The upper layer resin is impregnated with less than or the same amount of upper layer resin that exceeds the volume of the cloth, and the upper layer resin is applied and impregnated at a specific gravity of 1.00 to 1.20. The thickness is 0.3 to 4.0 kg, preferably 1.0 to 3.0 kg, more preferably 1.15 to 2.3 kg, and even more preferably 1.5 to 2.0 kg per 1 mm thickness and 1 m @ 2. The method for refurbishing an existing roof according to claim 1 or 3. Since the upper layer resin exceeding the volume of the cloth is applied and impregnated, the upper layer resin containing the cloth becomes strong and the strength of the roof can be increased.

[5] The fabric is a woven fabric or a non-woven fabric, has no cushioning properties, and has a void or a perforated hole impregnated with the upper layer resin, and the void or the hole is 20 to 40% of the volume of the fabric. The thickness is 0.1 to 20 mm, preferably 0.2 to 10 mm, more preferably 0.5 to 5 mm, still more preferably 1 to 3 mm, and the weight per unit area is 5 to 900 g / m <2>, preferably 10 to 10 mm. The method for refurbishing an existing roof according to claim 1, 3 or 4, which is 450 g / m 2, more preferably 25 to 270 g / m 2, and further preferably 50 to 170 g / m 2. The upper layer resin sufficiently enters the voids or the perforated holes, and the upper layer resin containing the cloth becomes strong and the strength of the roof can be increased.

[6] The cloth is made of synthetic resin such as polyethylene terephthalate or nylon, basalt fiber or glass fiber, and the filament yarn of the nonwoven fabric is formed of polyethylene terephthalate or nylon synthetic resin. The method for repairing an existing roof according to claim 1, 3, 4 or 5. Thereby, the upper layer resin sufficiently enters the cloth, the upper layer resin containing the cloth becomes strong, and the strength of the roof can be increased.

[7] Before the cloth is laid, a waterproof lower layer resin is applied to the surface of the cleaned roof, and before the lower layer resin is dried, the thin fiber is formed on the applied lower layer resin. The method of repairing an existing roof according to claim 1, wherein: By this lower layer resin, the adhesion / sealing property of the cloth to the surface of the roof R can be improved.

[8] The method for repairing an existing roof according to claim 7, wherein the upper layer resin and the lower layer resin are the same. The mutual permeability / mutual affinity between the upper layer resin and the lower layer resin is improved, and no mismatched surface is formed between the upper layer resin and the lower layer resin, so that the strength between the upper layer resin and the lower layer resin can be improved.

[9] the surface of the fabric top layer resin is impregnated, weather resistance of the surface layer resin not mixed with the upper layer resin is applied, degradation or thereby protecting the upper layer resin and / or the lower tree cloth fat impregnated 9. The method of repairing an existing roof according to claim 1, 3, 4, 5, 6, 7 or 8, wherein the roof is prevented from being damaged. By this surface layer resin, the lower layer resin, the cloth and the upper layer resin can be protected to prevent deterioration.

[10] A fiber sheet is laid under the cloth, and the fiber sheet is impregnated with the upper layer resin or the lower layer resin. The material of the fiber sheet is made of synthetic resin, aramid fiber, carbon fiber, basalt fiber or The method for repairing an existing roof according to claim 1, wherein the method is glass fiber and has no cushioning property. This greatly increases the strength of the fabric impregnated with the lower layer resin or the upper layer resin.

[11] The surface of the roof is not cleaned or cleaned before the cloth is laid, wherein the existing roof according to claim 1, 3, 4, 5, 6, 7, 8, 9 or 10 is used. Refurbishment method. Without cleaning, when the roof is made of harmful substances such as asbestos, it is possible to prevent the harmful substances from being scattered and to contain the harmful substances. If cleaning is performed, the adhesion of the lower layer resin, the cloth or the upper layer resin to the roof can be improved.

[12] A hole is formed in the cloth at predetermined intervals, and the protrusion of the roof is inserted into the hole. 1, 2, 4, 5, 6, 7, 8. A method for repairing an existing roof according to 8, 9, 10 or 11. Thereby, it can repair by avoiding the protrusion of a roof, and the intensity | strength of a repair roof does not fall in the location of a protrusion.

[13] The hole of the cloth is formed in accordance with a plurality of sizes or a plurality of intervals of the protrusion, and the penetration is easy. , 8, 9, 10, 11 or 12. The method for repairing an existing roof. As a result, regardless of the size / thickness / interval of the protrusions, the cloth can be reliably spread without any gaps on the roof surface.

  A thin fiber cloth is laid on the surface of the existing roof, and a waterproof upper layer resin that can be impregnated into the cloth is further applied on the spread cloth, and the upper layer resin is impregnated into the cloth, By impregnating the upper layer resin, when the resin dries, the cloth is cured and the strength is improved. Therefore, the existing roof can be used as it is, and the waterproofness and strength of the roof can be improved, no building waste is produced, and the existing roof is not removed. There are effects such as being able to.

Shows how to repair the roof. Shows how to repair the roof. Shows how to repair the roof. Shows how to repair the roof. The expansion cross-section structure of the cloth 2 is shown. The plane of cloth 2 is shown. The cross section of the corrugated asbestos slate roof R is shown. A perforation hole 7 in the fabric 2 is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lower layer resin 2 ... Cloth 3 ... Upper layer resin 4 ... Surface layer resin 5 ... Fiber sheet 6 ... Line 7 ... Hole 11 ... Synthetic fiber filament 12 ... Interlaced part 13 ... Thermoplastic resin foam or thermosetting resin foam 14 ... closed cells 15 ... voids.

Claims (7)

Lay a thin fiber cloth on the existing roof,
On the laid cloth, a waterproof and liquid upper layer resin that can be impregnated into the cloth is further applied, and the upper layer resin is impregnated on the cloth until reaching the roof surface on the lower surface of the cloth,
The upper layer resin is dried, the strength to cure the said fabric is improved, the fabric top layer resin is impregnated the method comprising adhering to the roof,
A method of repairing an existing roof, wherein holes are formed in the cloth at predetermined intervals, and the protrusions of the roof are inserted into the holes . Lay a thin fiber cloth on the existing roof,
On this laid cloth, while further applying a waterproof and liquid upper layer resin that can be impregnated into the cloth, the cloth is impregnated with the upper layer resin until it reaches the surface of the roof on the lower surface of the cloth,
The upper layer resin is dried, the strength to cure the said fabric is improved, the fabric top layer resin is impregnated the method comprising adhering to the roof,
An existing roof characterized in that holes are formed in the cloth in accordance with a plurality of sizes or a plurality of intervals of the protrusions of the roof, and the protrusions of the roof are inserted into the holes so that penetration is easy. Repair method. Lay a thin fiber cloth on the existing roof,
On the laid cloth, a waterproof and liquid upper layer resin that can be impregnated into the cloth is further applied, and the upper layer resin is impregnated on the cloth until reaching the roof surface on the lower surface of the cloth,
The upper layer resin is dried, the strength to cure the said fabric is improved, the fabric top layer resin is impregnated the method comprising adhering to the roof,
A method for refurbishing an existing roof, wherein the fibers of the cloth have a number of closed cells having an average diameter of 45 to 135 micrometers, and the specific gravity of the cloth is 0.03 to 0.06 . Before the cloth is laid, a waterproof lower layer resin is applied to the surface of the cleaned roof, and before the lower layer resin is dried, the thin fiber cloth is placed on the applied lower layer resin. The method for repairing an existing roof according to claim 1 , wherein the roof is laid. 5. The method for repairing an existing roof according to claim 4, wherein the upper layer resin and the lower layer resin are the same. The surface of the cloth impregnated with the upper layer resin is coated with a weather-resistant surface layer resin that is not mixed with the upper layer resin, thereby protecting the cloth impregnated with the upper layer resin and / or the lower layer resin to deteriorate or break. The method for refurbishing an existing roof according to claim 1, 2, 3, 4 or 5 . A roof refurbishment structure repaired by the existing roof refurbishing method according to claim 1 , claim 2, claim 3, claim 4, claim 5, or claim 6 .

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