JP4387808B2 - Asbestos material containment method and containment structure - Google Patents

Description

  The present invention relates to an asbestos material containment method and containment structure, and more particularly to an existing asbestos material containment method and containment structure that have already been built and have 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. In particular, asbestos (asbestos) materials are very harmful to the human body, and it has been pointed out that asbestos particles may cause lung cancer if they enter the human lungs. Such asbestos materials deteriorated with the passage of time, and there was a risk that asbestos particles were scattered from the surface.

  In order to solve this, there are conventional techniques shown in the following patent documents. However, this is contained only by the paint, and has problems in strength and durability. The conventional patent documents are as follows and should be referred to.

JP-A-6-49391

  An object of the present invention is to contain such harmful asbestos (asbestos) and prevent scattering of asbestos particles.

  In order to achieve the above-mentioned object, the present invention lays a net on asbestos material, and further applies a waterproof liquid upper layer resin that can penetrate into the gap between the nets on the laid net. The upper layer resin is infiltrated into the net until it reaches the surface of the asbestos material on the lower surface of the net, and when the upper layer resin is cured and dried, the net is cured and the strength is improved and the upper layer resin is infiltrated. The net was adhered to the asbestos material.

  Thereby, the existing asbestos material can be enclosed and scattering of asbestos particles can be prevented. Moreover, the waterproofness and strength of the asbestos material can be improved, and the asbestos material can be used while the asbestos material is contained, and the asbestos material need not be discarded.

  The upper layer resin 3 or the lower layer resin 1 is applied to the surface of the asbestos material R of the existing roof, the asbestos is contained, and the surface layer resin 4 is further applied. Although the strength is improved when the net 2 is laid, the net 2 may be omitted. The application of the lower layer resin 1 or the surface layer resin 4 may be omitted depending on circumstances. In the following examples, asbestos material R is an example of a roof.

(1) Asbestos material containment method Asbestos material R to be repaired is used for roofs, arcade roofs, building rooftops, dome-shaped roofs, roofs of prefabricated houses, wooden houses. The top or bottom surface (attic) of the roof of a building / facility such as a roof, roof of a reinforced concrete structure / rooftop, etc. Inclined surface, building / facility vertical surface / inclined wall surface, horizontal / vertical / inclined underground burial / ground earth pipe / pipe / electric pole / iron pole / pillar / tower / gate / bridge / road / tunnel The outer surface / inner surface of

The method of repairing the asbestos material R includes the following steps.
(Step A) On the surface of the asbestos material R, a waterproof and liquid lower layer resin 1 capable of penetrating the net 2 is applied (FIG. 1).
(Step B) A net 2 is laid on the surface of the roof R to which the lower layer resin 1 is applied (FIG. 2).
(Step C) A waterproof upper liquid resin 3 that can penetrate into the net 2 is further applied on the net 2 (FIG. 3).
(Step D) A weather-resistant surface layer resin 4 is applied to the surface of the mesh 2 infiltrated with the upper layer resin 3 (FIG. 4).

  In addition, it is possible to clean the surface of the asbestos material R in the above (Step A). Further, it is possible to omit the application of the lower layer resin 1 in the step A. Furthermore, it is possible to omit the laying of the net 2 in the process B.

  What supports the asbestos material R in the process A may be a steel frame T, a reinforced concrete, a building block, or the like, and the structure may be a fireproof structure or a semi-fireproof structure. Asbestos material R is cleaned by sweeping, washing with water, washing with detergent, washing with jet water, washing machine, scrubber or electric brush, and hitting dry ice particles against the surface of asbestos material R. Any of the cleaning of the dry ice blast which removes the dirt on the surface, etc. may be used, or a combination thereof 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 asbestos material R and the exfoliated material of the asbestos material R are not removed, and are encapsulated with the lower layer resin 1 or the upper layer resin 3. Thereby, the scattering of the debris of the surface of the asbestos material R and the raw material of the asbestos material R can be prevented. When the material of this asbestos material R is made of harmful materials such as asbestos, asbestos slate, heavy metal, vinyl chloride resin, dioxin, etc., it is possible to prevent such exfoliation from scattering, and to improve human health and the environment. There is no adverse effect.

  According to the experiment, when such cleaning is not performed, the strength of the existing asbestos material repaired by the above process is not decreased or is only a few percent compared to the case where cleaning is performed, and the problem on strength is There wasn't.

  The mesh 2 of the process B is laid before the lower layer resin 1 of the process A is cured and dried, and the lower resin 1 also penetrates into the mesh 2. The lower layer resin 1 is the same as the upper layer resin 3, but may be different. In some cases, 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 net 2 may be laid after the lower layer resin 1 is cured and dried. The drying time in this case is several hours and is completely cured and 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 C is the same as the thickness of the net 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 they are sufficiently or partially penetrated into the net 2 and fully or partially penetrated. 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 net 2 as will be described later.

  The upper layer resin 3 in Step C is infiltrated until it reaches the surface of the asbestos material R on the lower surface of the net 2. When the upper layer resin 3 is cured and dried, the net 2 is cured and the strength of the modified asbestos material is improved. Furthermore, the net | network 2 is adhere | attached on the said asbestos material R by the upper layer resin 3, Thereby, the intensity | strength of the asbestos material R improves further.

  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, if the surface layer resin 4 is applied after the upper layer resin 3 is cured and dried, the two are not mixed. . 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, non-foaming or foaming, and waterproof. For example, unsaturated polyester resin, saturated polyester resin, unsaturated / saturated acrylic resin, alkyd resin, phenol resin, epoxy resin, nylon resin, melamine resin, urea resin, polyurethane, polyethylene, polyvinyl chloride, polystyrene, polypropylene Methacrylic resins, polycarbonates, polyamides, polyacetals, fluororesins, and mixtures thereof. Nylon resins, epoxy resins, and polyester resins are desirable, and unsaturated polyester resins are more desirable.

  These upper layer resin 3 and lower layer resin 1 are liquid, sol-like or gel-like at room temperature, and those which can sufficiently penetrate into the net 2 are selected. The permeation amount of the upper layer resin 3 (or / and the lower layer resin 1) to the net 2 is 15% to 500%, desirably 25% to 250%, more desirably 35% to 100% of the volume of the net 2 (including the gap 22). (Same volume), more desirably 45% to 75%, and even more desirably 50% to 60%, such as 55%, and the upper layer resin 3 or the amount less than or exceeding the volume of the mesh 2 (including the gap 22) / And lower layer resin 1 is applied and penetrated.

  By this permeation, the upper layer resin 3 incorporating the net 2 is strengthened and the strength of the asbestos material R can be increased. The permeation amount of the upper layer resin 3 (or / and the lower layer resin 1) is less than the volume of the mesh 2, and the coating volume of the upper layer resin 3 (or / and the lower layer resin 1) is smaller than the volume of the mesh 2 (including the gap 22). Also good. 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 mesh 2 (including the gap 22).

  The coating amount and the permeation amount of the upper layer resin 3 and the lower layer resin 1 are 0 per 1 mm (millimeter) thickness of the net 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 permeation, the upper layer resin 3 incorporating the net 2 is strengthened and the strength of the asbestos material 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, the waterproof property of the modified asbestos material is achieved if the surface resin 4 is oily. 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 and infiltrate the foam 2 or the non-foamable resin composition liquid of the upper layer resin 3 or the lower layer resin 1 to the net 2, in addition to application by brush or roller, spraying by spraying, etc., generally known saturators, coaters, etc. The method is applied. By applying the lower layer resin 1, the adhesion / sealing property of the net 2 to the surface of the asbestos material 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 which is 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 cracks / scratches / dirt is unlikely to occur, and the upper layer resin 3 and / or the lower layer resin 1 penetrates the network 2 Is protected over a long period of time, and the net 2 into which the upper layer resin 3 and / or the lower layer resin 1 has permeated 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, 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 infiltrate the foamable or non-foamable resin composition liquid of the surface layer resin 4 onto the surface of the upper layer resin 3 applied / penetrated into the net 2, application with a brush or roller, spraying with a spray, or the like is 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 layer resin 4 is made flame retardant, the upper layer resin 3 and the lower layer resin 1 can be protected from fire, 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 asbestos material R with water, the upper layer resin 3 or the lower layer resin 1 can be applied immediately without waiting for curing / drying or omitting the curing / 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 and shape of net 2 FIG. 5 shows the net. The thread 21 of the mesh 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, metal fiber, wire, etc. It is.

  The porosity (area ratio) of the net 2 is 50 to 90%. This porosity indicates the ratio of the area of the gap 22 to the entire area of the net 2. In this case, the ratio of the thickness of the thread 21 to the total width of the width (gap / opening) 22 of the mesh 2 and the thickness of the thread 21 is 30 to 5%. ) The ratio of the width of the gap (gap / opening) 22 to the total width of the width of 22 and the thickness of the thread 21 is 70 to 95%. The upper layer resin 3 sufficiently enters the net 2 and the upper layer resin 3 incorporating the net 2 becomes strong, and the strength of the asbestos material R can be increased.

  In order to apply and infiltrate the net 2 with the foamable or non-foamable resin composition liquid of the upper layer resin 3 or the lower layer resin 1, in addition to application with a brush or roller, spraying with a spray, generally known saturators, coaters, etc. The method is applied. The penetration amount of the composition liquid is appropriately 50 to 110 parts by weight with respect to 100 parts by weight of the mesh 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 net ratio of 2 is not obtained, and the amount exceeds 110 parts by weight, the texture of the net 2 becomes hard, the penetration amount of the thermosetting resin liquid at the time of secondary processing decreases, the rigidity decreases, and further economically Absent. The upper layer resin 3 sufficiently enters the voids, and the upper layer resin 3 having the net 2 built therein becomes strong and the strength of the asbestos material R can be increased.

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

  The net 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 / m 2, preferably 10 to 450 g / m 2, more preferably 25 to 270 g / m 2, and even more preferably 50 to 170 g / m 2, but not limited to the above range. The net 2 may be thin or thick, and may be made of fiber or non-fiber.

  The weave of the mesh 2 may be any of plain weave, twill weave, and soot weave. Further, at the intersection of the warp yarn and the weft yarn of the yarn 21 of the mesh 2, the warp yarn and the weft yarn may be entangled or tied together to connect the warp yarn and the weft yarn. The net 2 must be made of a material that allows the upper resin 3 and / or the lower resin 1 to easily penetrate. This is because the strength of the net 2 through which the upper layer resin 3 and / or the lower layer resin 1 has permeated cannot be sufficiently exerted unless it penetrates sufficiently.

  Even if there is a protrusion S on the surface of the asbestos material R, there is a gap 22 in the net 2, so that the protrusion S can pass through the gap 22 of the net 2 and hinder the installation of the net 2. Never become. Since the net 2 has a larger proportion of the gaps 22 than the cloth, the net 2 can be securely adhered to the surface of the asbestos material R regardless of the spacing between the protrusions S.

  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.

  When the asbestos material R is a slate roof, the protrusions S (bolts and the like) are attached at intervals of 260 mm in the horizontal direction and at intervals of 800 mm in the vertical direction. Even if the asbestos material R is corrugated and the mesh 2 is laid along the corrugation in the lateral direction, a large number of the gaps 22 of the mesh 2 are formed, so that each gap 22 reliably inserts all the projections S. be able to.

(5) Test result of the containment asbestos material of the present invention The strength of the contained asbestos material R was strengthened as follows by the containment method and the containment structure of the asbestos material of the present invention. In this strength improvement test, asbestos material R having a corrugated slate roof was used, and pressure was applied over the direction of the line across the corrugations of the existing corrugated slate roof asbestos material R to measure the pressure applied until breakage. The breaking strength of the existing corrugated slate asbestos material before the repair was 4.6 KN (kilonewtons), 469.3 kgf, but by applying the repair of the present invention, 5.5 kN (kilonewtons), 563. 1 kgf (kilogram force), a strength improvement of nearly 1.2 times was achieved.

  Moreover, the following test data were obtained by the test about the adhesive strength with respect to the flat surface of the net | network 2 which the upper layer resin 3 and / or the lower layer resin 1 osmose | permeated. For asbestos material R of a flat slate roof, the net 2 in which the upper layer resin 3 and / or the lower layer resin 1 penetrates is contained by the asbestos material containment method of the present invention, and 7.3 kgf is used to peel it off. A force of / cm @ 2 was required.

  This is because the mesh 2 infiltrated 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 mesh 2 with the upper layer resin 3 and / or the lower layer resin 1 infiltrated. Exfoliation took place until the material was destroyed. That is, the adhesion strength of the mesh 2 permeated 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, the mesh 2 in which the upper layer resin 3 and / or the lower layer resin 1 has permeated the planar concrete material is contained by the asbestos material containment method and the containment structure of the present invention, and is peeled off. A force of 0 kgf / cm @ 2 was required.

  This is also because the mesh 2 infiltrated with the upper layer resin 3 and / or the lower layer resin 1 is not peeled off from the concrete plane, but the concrete plane is adhered to the net 2 with the upper layer resin 3 and / or the lower layer resin 1 infiltrated. Exfoliation was done until it was destroyed. That is, the adhesion strength of the mesh 2 into which the upper layer resin 3 and / or the lower layer resin 1 penetrated 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 asbestos material containment method and containment structure of the present invention. Since the thickness of the mesh 2 is thin and the specific gravity of the upper layer resin 3 and / or the lower layer resin 1 to be permeated is close to water and light, the light mesh 2 is not only contained in the resins 1, 3, 4 but also in this resin. Since it is built-in, the weight of the entire repair structure is 0.7 to 1.1 kg / m 2, 0.9 kg / m 2 on average, and the load on asbestos material is small.

  Further, 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 mentioned above, the strength of asbestos material is improved and the adhesive strength to asbestos material is high, so it has excellent durability, and durability of 20 years or more, sometimes 25 to 30 years or more is obtained, and scattering of harmful substances such as asbestos. In addition to preventing this, the number of containment 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 asbestos material R itself such as a slate roof, the upper layer resin 3 and / or the lower layer resin 1 do not slip during construction or inspection and can prevent slipping down 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.

  Furthermore, in the asbestos material containment method and containment structure of the present invention, the same resin material of 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 net 2. Therefore, after several years have passed after the asbestos material containment method of the present invention, even when the asbestos material is further contained on the containment asbestos material by the same method, the resins are mixed and joined together. Affinity is good, and it is possible to add a containment material firmly. In this case, the surface of the containment structure need only be cleaned / washed before the containment material is overlaid.

  FIG. 6 shows a second embodiment. In this second embodiment, the asbestos material R is a flat plate. The protrusion S includes a bolt 31, a packing 32, and a nut 33. The packing 32 is inserted into the bolt 31 and is in close contact with the surface of the asbestos material R. The nut 33 is screwed onto the bolt 31 and is in close contact with the packing 32.

  The thickness of the applied lower layer resin 1 substantially matches the thickness of the packing 32. The total thickness of the mesh 2, the upper layer resin 3, and the surface layer resin 4 substantially matches the thickness of the nut 33. As described above, the thickness of a part or all of the protrusions S is equal to the thickness of some or all of the lower layer resin 1, the net 2, the upper layer resin 3, and the surface layer resin 4. Thereby, the containment structure of the asbestos material is integrated with a part or all of the protrusions S, becomes stronger, and the aesthetics are also improved.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the present invention is optimal for containment of asbestos materials in large facilities such as factories, sports facilities, and public facilities, but the asbestos materials to be contained are not limited to slate roofs, and may be any asbestos material.

  In addition to the asbestos and asbestos slate, what is contained by the containment method of the present invention may be either scattering or non-scattering, such as dust that has deteriorated or dust at the time of dismantling. The surface to be contained may be a lower surface in addition to the upper surface of a building / facility such as a roof or a ceiling, or may be an unfaced / inclined surface.

  When applying the lower layer resin 1, the upper layer resin 3 or the surface layer resin 4 to the vertical surface, the inclined surface or the lower surface, it may be applied from the top to the bottom. When the net 2 is laid, the net 2 is temporarily fixed to the wall surface. Or just pin it. 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, spraying with a spray gun or the like, and when laying the net 2, the thin net 2 is selected. 2 can be attached to the lower surface.

  In each of the above embodiments, since the mesh 2 is placed in each of the resins 1, 3, and 4, the resins 1, 3, 4 and the mesh 2 are more familiar than the resin alone, and the mesh 2 is arranged. It becomes a streak to improve strength and durability, and the net 2 serves as a medium and the resins 1, 3, and 4 are well adapted to asbestos materials, and the strength is also improved and durability is improved. Therefore, as the strength is improved, the respective resins 1, 3, and 4 are made thinner to reduce the cost. This thinness is, for example, 0.9 kg / m2. Moreover, the net | network 2 becomes a medium and resin 1,3,4 becomes familiar with asbestos material, and the adhesiveness to the asbestos material of resin 1,3,4 improves. Further, the projection S such as a stud pin can be passed through the gap 22 of the mesh 2, so that no drilling is required in the mesh 2, and the construction becomes easy.

(6) Advantages of Other Invention [1] A net is laid on an existing asbestos material, and a waterproof liquid upper layer resin that can penetrate into the gaps of the net is further applied on the laid net. At the same time, the upper layer resin is infiltrated into the net until it reaches the surface of the asbestos material on the lower surface of the net, and when the upper layer resin is dried, the net is cured and the strength is improved and the upper layer resin is infiltrated. A method for containing asbestos material, wherein a net is bonded to the asbestos material. Thereby, scattering of asbestos can be prevented and the strength of asbestos material can be improved.

[2] above wherein the containment structure asbestos materials that are contained by the containment process of the existing asbestos material of claim 1. Thereby, scattering of asbestos can be prevented and the strength of asbestos material can be improved.

[3] The upper layer resin is thermosetting, non-foaming, or liquid at room temperature, preferably a nylon resin, an epoxy resin or a polyester resin, more preferably an unsaturated polyester resin, or the upper layer resin. The permeation amount of the resin into the net is 15% to 500%, desirably 25% to 250%, more desirably 35% to 100% (same volume), and more desirably 45% to 75% of the net volume (including gaps). The method for containing asbestos material according to claim 1, wherein the content is%. Due to the permeation of the upper layer resin, the upper layer resin with a built-in net becomes stronger and the strength of the roof can be increased.

[4] The upper layer resin is coated with and penetrated by an amount of the upper layer resin that is less than or exceeds the volume of the net including the gap. The amount of the upper layer resin applied and penetrated is a specific gravity of 1.00 to 1.20. 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 containment method of the asbestos material of Claim 1 or 3 characterized by these. Since the upper layer resin exceeding the volume of the net is applied and penetrated, the upper layer resin with the net incorporated becomes stronger and the strength of the roof can be increased.

[5] The mesh gap occupies 50 to 90% of the mesh volume, and the mesh thickness is 0.1 to 20 mm, preferably 0.2 to 10 mm, more preferably 0.5 to 5 mm. The weight is preferably 1 to 3 mm, and the weight per unit area is 5 to 900 g / m @ 2, preferably 10 to 450 g / m @ 2, more preferably 25 to 270 g / m @ 2, and further preferably 50 to 170 g / m @ 2. Containment method for asbestos materials as described. The upper layer resin sufficiently enters the gap, and the upper layer resin with a built-in net becomes stronger and the strength of the roof can be increased.

[6] The asbestos material according to claim 1, 3, 4 or 5, wherein the net is made of synthetic resin such as polyethylene terephthalate or nylon, metal fiber, wire, basalt fiber or glass fiber. Containment method. As a result, the upper layer resin sufficiently enters the net, and the upper layer resin having the net built therein becomes strong and the strength of the roof can be increased.

[7] Before the net is laid, a waterproof lower layer resin is applied to the surface of the asbestos material, and before or after the lower layer resin is cured and dried, the net is laid on the applied lower layer resin. The asbestos material containment method according to claim 1, 3, 4, 5 or 6. By this lower layer resin, the adhesion / sealing property of the net to the asbestos material R surface can be improved.

[8] The asbestos material containment method 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] A weather-resistant surface layer resin that is not mixed with the upper layer resin is applied to the upper surface of the applied upper layer resin, thereby protecting or deteriorating or damaging the net on which the upper layer resin and / or the lower layer resin is applied. The asbestos material containment method according to claim 1, 3, 4, 5, 6, 7 or 8. By this surface layer resin, the lower layer resin, the net and the upper layer resin can be protected to prevent deterioration.

[10] The containment of asbestos material according to claim 1, 3, 4, 5, 6, 7, 8 or 9, wherein the surface of the asbestos material is not cleaned or cleaned before the net is laid. Method. Without cleaning, harmful substances can be prevented from scattering during cleaning, and harmful substances can be contained. If it cleans, the adhesiveness to the asbestos material of lower layer resin, a net | network, or upper layer resin can be improved.

[11] The containment method of asbestos material according to claim 1, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the projection of the asbestos material is inserted into the gap of the mesh. . Thereby, it is possible to perform the containment while avoiding the protrusions on the roof, and the strength of the containment structure does not decrease at the positions of the protrusions. Further, regardless of the size / thickness / interval of the projections, it is possible to reliably lay the net on the roof surface without any gaps.

  The present invention lays a net on an asbestos material, and further applies a waterproof liquid upper layer resin that can penetrate into the gaps of the net, and also applies the upper layer resin to the net. Penetration until the surface of the asbestos material reaches the surface of the asbestos material on the lower surface of the net, and when the upper layer resin is cured and dried, the net is cured and the strength is improved, and the net penetrated by the upper layer resin adheres to the asbestos material. It was made to be. Therefore, the existing asbestos material can be contained and the scattering of asbestos particles can be prevented. Moreover, the waterproofness and strength of the asbestos material can be improved, the asbestos material can be used while the asbestos material is contained, and it is not necessary to discard the asbestos material.

The repair method of asbestos material R is shown. The repair method of asbestos material R is shown. The repair method of asbestos material R is shown. The repair method of asbestos material R is shown. The plane of the net 2 is shown. 2nd Example is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lower layer resin 2 ... Net | network 3 ... Upper layer resin 4 ... Surface layer resin 21 ... Thread 22 ... Crevice 31 ... Bolt 32 ... Packing 33 ... Nut

Claims (11)

Lay the net on the existing asbestos material,
On top of this net, apply a waterproof, liquid upper layer resin that can penetrate into the gaps of the net, and penetrate the upper layer resin to the net until it reaches the surface of the asbestos material on the lower surface of the net. When the upper layer resin is dried, the net is cured to improve the strength, and the net infiltrated with the upper layer resin is bonded to the asbestos material. Containment structure of asbestos materials that are contained by the containment process of the existing asbestos materials of the first aspect. The upper layer resin is a thermosetting, a non-foam, liquid at normal temperature, an unsaturated polyester resin, amount of penetration with respect to the network of the upper layer resin is 45% of the volume of the network including gaps The method for containing asbestos material according to claim 1, which is ˜75%. The upper layer resin is applied and infiltrated with an upper layer resin in an amount less than or exceeding the net volume including the gap, and the upper resin is applied and infiltrated at a specific gravity of 1.00 to 1.20, with a net thickness of 1 mm. claim 1 or 3 containment method asbestos materials according characterized in that it is a per and per 1m2, 1.5~2.0kg. Interstices of the network accounts for 50-90% of the volume of the network, the thickness of the mesh is 1 to 3 mm, a weight per unit area is asbestos of claim 1, 3 or 4 wherein the 50~170g / m2 Material containment method.   6. The method for containing asbestos material according to claim 1, wherein the net is made of a synthetic resin such as polyethylene terephthalate or nylon, metal fiber, wire, basalt fiber, or glass fiber.   Before the net is laid, a waterproof lower layer resin is applied to the surface of the asbestos material, and before or after the lower layer resin is cured and dried, the net is laid on the applied lower layer resin. The method for containing asbestos material according to claim 1, 3, 4, 5 or 6.   The method for containing asbestos material according to claim 7, wherein the upper layer resin and the lower layer resin are the same. A weather-resistant surface layer resin that is not mixed with the upper layer resin is applied to the upper surface of the applied upper layer resin to protect the net on which the upper layer resin is applied and prevent deterioration or breakage. The method for containing asbestos material according to 1, 3, 4, 5, 6, 7 or 8. Before laying the network, according to claim 1,3,4,5,6,7,8 or 9 containment method asbestos materials for wherein the go, such clean the surface of the asbestos material. The asbestos material containment method according to claim 1, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the protrusion of the asbestos material is inserted into the gap of the mesh.

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