KR20090076082A - Asbestos removal agent and asbestos removal process using the same - Google Patents

Abstract

An asbestos removal agent is provided to ensure penetrability and bonding ability, to safely solidify asbestos fibers within a building structure, and to prevent the flying of dust such as asbestos fiber component, rock wool or cement. An asbestos removal agent comprises a first asbestos removal agent(Tr-1) with high penetration obtained by mixing mainly metal hydroxide and/or metal salt of strong base and weak acid, natural glue or resin binder, and water; and a second asbestos removal agent(Tr-2) with high bonding ability obtained by mixing ainly metal hydroxide and/or metal salt of strong base and weak acid, natural glue or resin binder, aggregate and water.

Description

ASBESTOS REMOVAL AGENT AND ASBESTOS REMOVAL PROCESS USING THE SAME}

The present invention provides an asbestos treatment agent and an asbestos treatment using the asbestos fiber component, rock wool or dust generated from a building structure containing asbestos fiber components, as well as the asbestos treatment agent to ensure that the asbestos fibers are firmly enclosed and solidified. It is about public law.

As is well known, in existing concrete buildings (public facility buildings, company factories, bachelor's, history, etc.) or general households, fire-resistant cladding materials containing dusty materials such as asbestos, rock wool, and cement are used as insulation, fire-resistant or sound-absorbing materials. It is used a lot. In particular, the existing heat-insulating, fire-resistant or sound-absorbing building materials containing asbestos fibers, which have been used in the past, have been pointed out as a serious problem because the asbestos fibers in the building materials are dusted, scattered, and penetrated into the human body.

Conventionally, in order to solve the above problems, (1) a method of spraying a vinyl acetate-based emulsion on an existing dust-containing building material to shield the surface thereof, or (2) spraying a water-soluble polymer such as acrylic synthetic resin to penetrate dust. How to do it.

However, in the above conventional technique, the method using the vinyl acetate-based emulsion is effective in shielding the surface of the asbestos fiber-containing building material. However, since it does not penetrate into the interior, the spray layer and the surface of the asbestos fiber-containing building material are ineffective. There existed a fault which peeling generate | occur | produced in between. Since there is no permeability into the interior, when disassembling or remodeling the asbestos fiber-containing building material, there was a large defect that the asbestos fibers in the building material scattered.

On the other hand, in the above conventional technique, in the method using water-soluble polymer such as acrylic synthetic resin, even if the concentration is adjusted and processed, there is a limit to the permeability into the building material, and the sealing durability at the time of sealing is weak, preventing the building material from dusting. The effect was insufficient. In addition, there is a problem that the material cost is very high.

[Patent Document 1] Japanese Unexamined Patent Publication No. 6-49391 (Summary)

The present invention provides an asbestos treating agent suitable for solving the above-mentioned drawbacks and problems of the prior art and an asbestos treating method using the same, and in particular, using a first asbestos treating agent having high permeability and a second asbestos treating agent having high sealing property, First, by spray application of the first asbestos treatment agent, the first asbestos treatment agent is penetrated into the existing dry structure, acting on the asbestos fiber component, and then by spray application of the second asbestos treatment agent, the asbestos fiber in the existing dry structure. It is possible to provide an effective asbestos treatment method that can seal the components securely, simplify the asbestos treatment method itself, and shorten the air.

As for this invention, in order to achieve the said objective, the invention of Claim 1 is an asbestos treatment agent enclosed in the existing building structure containing asbestos fiber in order to prevent the scattering and deprivation of the asbestos fiber component in the said existing building structure. as,

A metal permeate mainly composed of metal hydroxides and / or strong bases and weak acids, natural grasses or resin binders, and a highly permeable first asbestos treatment agent mixed with water, mainly metal hydroxides and / or strong bases and metal salts of weak acids, natural grasses or A resin binder, aggregate, and a combination of a high sealing property asbestos treatment agent formed by mixing with water, wherein the first asbestos treatment agent is applied or sprayed to the surface of the existing construction structure containing the asbestos fibers It is made of a highly permeable treatment agent which penetrates inside and is suitable for forming an organometallic compound after drying, and the second asbestos treatment agent is suitable for sealing and solidifying by solidifying by spraying the surface of the existing dry structure after the treatment of the first asbestos treatment agent. Asbestos treatment agent characterized by comprising this high treatment agent To.

In the present invention, the invention according to claim 2 is the asbestos treatment agent according to claim 1, wherein the first asbestos treatment agent is 0.1 to 2% by weight of metal hydroxide and / or strong base and metal salt of weak acid, and 0.5 to 20% by weight. Is a high permeability asbestos treatment agent formed by mixing a natural grass or resin binder with 78 to 99% by weight of water, and the second asbestos treatment agent is a metal salt of 20 to 50% by weight of a metal hydroxide and / or a strong base and a weak acid, It is an asbestos treatment agent with high sealing property formed by mixing 0.5-10 weight% natural grass or resin binder, 1-10 weight% aggregate, and 25-75 weight% water.

In the present invention, the invention according to claim 3 is the asbestos treatment agent according to claim 1 or 2, wherein 0.01 to 5% by weight of organic or inorganic short fibers and / or long fibers are mixed with the second asbestos treatment agent. It is characterized by.

In the present invention, the invention described in claim 4 is the asbestos treating agent according to claim 3, wherein the organic or inorganic fiber is organic such as natural fibers such as hemp, manila hemp or cellulose, rayon, nylon, polypropylene or aramid fibers. It is characterized by being an inorganic fiber, such as a fiber or glass fiber or carbon fiber.

In the present invention, the invention described in claim 5 is the asbestos treating agent according to claim 1 to 4, wherein the vegetable or animal oil is added to the asbestos treating agent.

In the present invention, the invention according to claim 6 is the asbestos treatment agent according to claim 5, wherein the vegetable or animal oil is vegetable oil such as rapeseed oil, sesame oil, soybean oil or palm oil, or animal oil such as fish oil. .

In the present invention, the invention described in claim 7 is the asbestos treating agent according to any one of claims 1 to 6, wherein the metal hydroxide is potassium hydroxide, magnesium hydroxide or aluminum hydroxide, and the strong salt and the weak acid metal salt are carbonic acid. It is characterized by being calcium, magnesium carbonate, calcium silicate or magnesium silicate.

In the present invention, the invention according to claim 8 is the asbestos treatment agent according to any one of claims 1 to 7, wherein the vegetable or animal grass is a vegetable grass such as starch, ginkgo or azuki bean, or gelatin, collagen or glue. It is characterized by the animal pools, such as.

In the present invention, the invention according to claim 9 is the asbestos treatment agent according to any one of claims 1 to 8, wherein a natural rubber or a synthetic rubber is added to the asbestos treatment agent.

Moreover, in this invention, invention of Claim 10 is an asbestos processing method using the asbestos processing agent enclosed with respect to the existing building structure containing asbestos fiber in order to prevent scattering and deprivation of the asbestos fiber component in the said existing building structure. Preparing a highly permeable first asbestos treatment agent comprising a metal salt of a metal hydroxide and / or a strong base and a weak acid, a natural grass or a resin binder, and water, and a metal salt mainly of a metal hydroxide and / or a strong base and a weak acid. And a step of preparing a second high asbestos treatment agent which is formed by mixing a natural grass or resin binder, aggregate and water, and applying or spraying the first asbestos treatment agent to the surface of the existing building structure. A process of treating the asbestos treatment agent to penetrate the inside of the structure, and then It is to construct the second Asbestos Asbestos treated by spray application of the treatment agent with the asbestos treatment agent which comprises in a second process for covering the asbestos treatment method Existing dry product structure on the surface of the dried material structure.

In addition, in the present invention, the invention described in claim 11 is the asbestos treatment method according to claim 10, wherein, after the first asbestos treatment agent treatment step, an alkali-resistant glass fiber net member is formed along the surface of the existing dried structure. And a net member installation step of installing on the surface of the existing building structure, and spray-coating the second asbestos treatment agent from above the net member provided on the surface of the existing building structure. It is characterized by covering the structure.

In addition, in the present invention, the invention described in claim 12 is the asbestos treatment method according to claim 11, wherein the net member mounting means includes a bent attachment bracket, and the attachment bracket is fixed to the surface of the existing construction structure. And a raised portion extending outwardly from one side of the base, and a net engaging portion extending in a direction parallel to the base from an upper end of the raised portion.

In addition, in the present invention, the invention described in claim 13 is the asbestos treatment method according to claim 11 or 12, wherein the net member mounting means comprises a dedicated piece used together with a relatively large washer. It is characterized by fixing the said net member to the surface of the said board body by a piece.

In addition, in the present invention, the invention according to claim 14 is an asbestos treatment method in which a board body containing an asbestos fiber component is enclosed in order to prevent desorption of asbestos fiber components in the board body. Or a step of preparing a highly permeable first asbestos treatment agent formed by mixing a metal salt of a strong base and a weak acid, a natural grass or a resin binder, and water, a metal salt of a metal hydroxide and / or a strong base and a weak acid, and a natural grass or a resin. A process of preparing a high sealing property asbestos treatment agent which mixes a binder, aggregate, and water, and the 1st asbestos coating agent which sprays or sprays on the surface of a board | substrate, and penetrates into the said board | substrate inside. Asbestos treatment agent and the net member of the alkali-resistant glass fiber along the surface of the board body The net member installation process installed on the surface of a board | substrate through this, and the 2nd asbestos processing agent process process which spray-coats a said 2nd asbestos processing agent from the top of the net member provided on the surface of the said board body, and covers a board body with a net member. It is to constitute an asbestos treatment method characterized in that.

In the present invention, the invention according to claim 15 is the asbestos treatment method according to claim 10 to claim 14, wherein the first asbestos treatment agent is 0.1 to 2% by weight of a metal hydroxide and / or a strong base and a weak acid metal salt, and 0.5 to 20% by weight of natural grass or resin binder and 78 to 99% by weight of water is a high permeability asbestos treatment agent, the second asbestos treatment agent 20 to 50% by weight of the metal hydroxide and / or strong base and weak acid It is an asbestos treatment agent with high sealing property formed by mixing a metal salt, 0.5-10 weight% natural grass or resin binder, 1-10 weight% aggregate, and 25-75 weight% water. It is characterized by the above-mentioned.

In the present invention, the invention described in claim 16 is the asbestos treatment method according to claim 15, wherein 0.01 to 5% by weight of organic or inorganic short fibers and / or long fibers are mixed with the second asbestos treatment agent. It is done.

In the present invention, the invention described in claim 17 is an asbestos treatment method according to any one of claims 10 to 16, wherein an asbestos treatment agent injection mechanism is used for the injection treatment in the treatment with the first treatment agent. The asbestos treatment agent injection mechanism is provided with a plurality of injection needles that are inserted into the interior from the surface with respect to the building structure, characterized in that consisting of the pressure injection of the asbestos treatment agent into the inside of the building structure through the injection needle.

The asbestos treatment agent of the present invention having the above structure mainly comprises a metal hydroxide and / or a strong base and a metal salt of a weak acid, a natural grass or resin binder, and a high permeability first asbestos treatment agent formed by mixing water, mainly a metal hydroxide and // Or a combination of a strong base and a weak acid metal salt, a natural grass or resin binder, aggregate and a second high asbestos treatment agent formed by mixing water, wherein the first asbestos treatment agent is formed from the surface of the dry structure. To form an organometallic compound after drying, and then spraying the second asbestos treatment agent on the dried structure after the treatment of the first asbestos treatment agent to solidify it. That asbestos fibers can be limestoned and sealed safely and securely It works very effectively.

On the other hand, in the asbestos treatment method of the present invention, the first asbestos treatment agent having high permeability penetrates into the interior of the dry structure including asbestos fibers to form an organometallic compound after drying, and then the sealing property mainly containing lime is It is sprayed with a high second asbestos treatment agent, and calcium ions are applied to the surface of the asbestos fiber, firmly combined with the asbestos fiber, and calcified over time by the action of carbonic acid gas in the air. Finally, it can be said that it works very effectively in that it can be recycled by limestone.

In addition, according to the asbestos treatment method using the asbestos treatment agent of the present invention, a step of preparing a first asbestos treatment agent having a high permeability and a second asbestos treatment agent having a high sealing property, and applying or spraying the first asbestos treatment agent to the surface of the existing construction structure A first treatment step of penetrating the interior of the existing building structure, and a net member installation step of installing an alkali-resistant glass fiber net member on the surface of the existing building structure along the surface of the existing building structure through the member mounting means; The second asbestos treatment agent is constituted by a second treatment step of spray-coating the second asbestos treatment agent on the net member provided on the surface of the existing construction structure to cover the existing construction structure together with the net member. Penetrates into the surface of the existing building structure beyond its net member By forming the asbestos sealing layer with high mechanical durability, by assuring asbestos fiber components in the existing building structure, the asbestos treatment method itself can be simplified and the air can be shortened. Etc. It works very effectively.

In addition, according to the asbestos treatment method using the asbestos treatment agent of the present invention, it has a net member installation means, the net member installation means is composed of a bent mounting bracket, the base is fixed to the surface of the existing building structure, By having a raised portion extending outwardly from one side of the base and a net engaging portion extending in a direction parallel to the base from an upper end of the raised portion, the height of the net engaging portion can be easily changed by applying an external force. Asbestos treatment can simplify the work and shorten the air.

Hereinafter, the asbestos treatment agent of the present invention and the asbestos treatment method using the same will be described in detail.

First, according to the specific example of the asbestos treatment agent of this invention, the said asbestos treatment agent consists of the following things. The asbestos treatment agent is an alkaline aqueous solution or slurry mainly containing metal ions, a highly permeable first asbestos agent mixed with vegetable or animal grass, an alkaline aqueous solution or slurry mainly containing metal ions, vegetable or animal grass, organic or It consists of a combination of an inorganic fiber and the 2nd asbestos treatment agent with high sealing property which mixed aggregate.

Since the first asbestos treatment agent is composed of a solution having high permeability, the first asbestos treatment agent is applied, sprayed or injected onto the surface of a dry structure structure containing asbestos fibers, thereby gradually penetrating into the dry structure to form an organometallic compound after drying. Since the second asbestos treatment agent is composed of a high-sealing solution containing lime as a main component, by spraying the dried structure after the treatment of the first asbestos treatment agent, calcium ions are acted on the surface of asbestos fibers to bind the asbestos fibers firmly to the atmosphere. Limestone is formed over time by the action of carbon dioxide in the water.

In the present invention, the alkaline aqueous solution or slurry containing metal ions is a metal hydroxide and / or a metal salt of a strong base and a weak acid, and as the metal hydroxide, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, zinc hydroxide, iron hydroxide, or the like is effective, As the metal salt of the strong base and the weak acid, sodium silicate, potassium silicate, calcium silicate, sodium borate or sodium phosphate is effective.

In addition, in this invention, a vegetable or animal oil may be added to the said 1st and 2nd asbestos treatment agent. As this vegetable or animal oil, vegetable oils, such as vegetable oils, such as a rapeseed oil, sesame oil, soybean oil, and palm oil, or fish oil, are effective. As said vegetable or animal pool, vegetable grasses, such as starch, a ginkgo, a head, or gelatin, collagen, are effective. Or animal paste, such as glue, is effective. As the organic or inorganic fibers, natural fibers such as hemp, manila hemp or cellulose, organic fibers such as rayon, nylon, polypropylene or aramid fibers, or inorganic fibers such as glass fibers or carbon fibers are effective.

In the present invention, an appropriate amount of synthetic resin may be added to the asbestos treatment agent obtained by the above constitution, or a small amount of natural rubber or synthetic rubber may be added.

As said synthetic resin, vinyl acetate, an ethylene-vinyl acetate copolymer, etc. are effective, for example, and styrene butadiene rubber etc. are effective as a synthetic rubber.

Aggregate is mixed in the second asbestos treatment agent. As this aggregate, pearlite, a siras balloon, bead bal styrene, etc. are effective, for example.

In a specific example of the asbestos treating agent of the present invention, the asbestos treating agent is composed of the components shown below. Asbestos treatment agent,

0.1 to 2% by weight of metal hydroxides and / or strong bases and weak acid metal salts,

0.5 to 20% by weight of natural grass or resin binder,

It is set as the asbestos treatment agent with high permeability formed by mixing 78 to 99 weight% of water. On the other hand, the second asbestos treatment agent,

20-50% by weight of metal hydroxides and / or strong bases and weak acid metal salts,

0.5 to 10% by weight of natural grass or resin binder,

1 to 10% by weight of aggregate,

It is set as the high asbestos treating agent which seals 25-75 weight% of water. As a more preferable Example about the said 2nd asbestos treating agent, what mixed 0.01-5 weight% of organic or inorganic short fiber and / or long fiber to the said component is mentioned. In another embodiment, a small amount of synthetic resin, surfactant, natural rubber, synthetic rubber, or the like may be added to this structure.

In the above constituents, in particular, the second asbestos treatment agent has high viscosity by the action of the natural grass or resin binder, aggregate, organic or inorganic short fibers and / or long fibers to be mixed, for example, in FIGS. 2 and 3. In the embodiment to which the present net member N is applied, the short fiber and / or long fiber net member N, which penetrates the net member N and is connected to the surface of the existing construction structure beyond the net member, is also mixed. By forming the asbestos sealing layer with high entanglement in mechanical durability, it has the effect of being able to reliably seal the asbestos fiber component in the existing building structure.

In the above constituents, with respect to the metal hydroxide or / and strong base and the weak acid metal salt, in the first asbestos treatment agent, when this is 0.1% by weight or less, the concentration is too thin to function, and when it is 2% by weight or more, the permeability is poor. It is not desirable because it loses. On the other hand, in the second asbestos treatment agent, when this is 20% by weight or less, the film becomes thin and there is no effect on dust removal. On the other hand, when it is 50 weight% or more, the viscosity of the mixture liquid became too high and there was a problem in spraying or the like.

And in the said component, when this is 0.5 weight% or less with respect to the said vegetable or animal grass, a blocking state cannot be fixed over a long period of time. On the other hand, when it is 20 weight% or more, a viscosity is too high and cannot fully penetrate in a dry structure.

Moreover, in the said component, about the mixing amount of the said organic or inorganic fiber, in the case of the 1st asbestos treatment agent which does not mix this organic or inorganic fiber, there exists an effect which raises the permeability into a dry structure, and this organic or inorganic In the case of the 2nd asbestos treatment agent which mixed the fiber, there exists an effect which improves the sealing property of the dust in a dried structure.

Hereinafter, about the specific example of the asbestos processing agent of this invention, each structural component of a 1st asbestos processing agent and a 2nd processing agent is shown in Table 1, and the asbestos shatterproof processing agent which concerns on this and invention of patent document 1 (mainly The comparative example 1 and the comparative example 2 which are an acrylic resin emulsion as a component were compared, and the evaluation about permeability and sealing property was confirmed.

        Sample ingredients Embodiment of the present invention Processing example described in Patent Document 1 First processing example Second processing example Comparative Example 1 Comparative Example 2 Water (wt%) 98 52 95 60 Calcium hydroxide 1.0 30.0 - 30 Calcium carbonate - 5.0 - - Rapeseed oil - - - - Bank 1.0 1.0 - - aggregate - 5.0 - - three - 2.0 - - Acrylic Resin Emulsion - 5 10 permeability ◎ ○ × Sealability ◎ × ×

As can be seen from Table 1, in the asbestos treatment agent disclosed in the embodiment according to the present invention, the first asbestos treatment agent was the best in terms of permeability, the second asbestos treatment agent was the best in terms of sealability (sealing). . On the other hand, in Comparative Examples 1 and 2 mainly composed of an acrylic resin emulsion, in Comparative Example 1, only the permeability was good, but the sealing property was poor, and in Comparative Example 2, both the permeability and the blocking property were poor.

Next, the asbestos treatment method using the asbestos treatment agent according to the present invention will be described in detail according to the order thereof.

In this invention, the 1st and 2nd asbestos treatment agent which comprises the said structure is prepared previously. In one example, the first asbestos treating agent is a highly permeable asbestos treating agent mainly formed by mixing an alkaline aqueous solution or slurry containing a metal ion or a vegetable or animal grass, and the second asbestos treating agent is an alkali containing mainly metal ions. It is an asbestos treating agent with high sealing property which mixes an aqueous solution or a slurry, vegetable or animal grass, and organic or inorganic fiber. In the asbestos treatment system according to the present invention, the first asbestos treatment agent is sprayed into the dry structure to sufficiently infiltrate the first asbestos treatment agent into the dry structure, and then the second asbestos treatment agent is sprayed by spraying the second asbestos treatment agent. By this, asbestos fibers in the dried structure are tightly sealed.

In this invention, the reaction form of the asbestos processing agent with respect to the dry structure containing an asbestos fiber is demonstrated with reference to FIG. FIG. 1A is a view showing a state before the treatment with an asbestos treatment agent for the existing construction structure (H) in which an asbestos construction layer (As) including asbestos fibers is provided for a frame (F) such as reinforcing bars. Rock wool and asbestos fibers are mixed, and asbestos fibers are in a particularly free state over time, and the asbestos fibers are scattered.

FIG. 1B shows a state in which the first asbestos treatment agent (Tr-1) according to the present invention is processed by, for example, the dried structure in the state shown in FIG. 1A. In this case, the first asbestos treatment agent Tr-1 has high permeability and penetrates into the asbestos construction layer As of the dried structure. In addition, since the first asbestos treatment agent (Tr-1) contains calcium ions, vegetable oils, and the like, the first asbestos treatment agent (Tr-1) forms an organometallic compound as it is dried, thereby contributing to enhancing the blockage effect of asbestos fibers.

Next, the second asbestos treatment agent (Tr-2) according to the present invention is sprayed onto the surface of asbestos construction layer As of the dried structure. At this stage, the calcium ions in the second asbestos treatment agent (Tr-2) act on the surface of the asbestos fiber to bond firmly with the asbestos fiber (see Fig. 1C).

By treating as described above, the asbestos fibers condense in the form surrounded by lime, and inhaled carbon dioxide gas in the air over time and finally limestone to form a harmless substance. Even when dismantling the building structure in this state, it is harmless, so the replacement work is very safe and can be recycled after discharge.

The construction procedure of asbestos treatment using the asbestos treatment agent of this invention is demonstrated. Preparations for this asbestos treatment include preliminary investigations to measure the spray thickness of asbestos structures, preliminary cleaning of facilities, fixtures, walls, floors, ceilings, etc. in the surrounding environment, and installation of all the machines necessary for asbestos treatment. . In this preparatory work step, the dust concentration measurement before work is performed.

In the application | coating operation of the 1st asbestos treating agent by this invention, the test spray of a 1st asbestos processing agent is first performed, the spray treatment of a 1st asbestos processing agent is performed through a scattering prevention process, and a penetration check is performed. At this stage the concentration of dust in operation is measured. As for the treatment of the first asbestos treatment agent, the asbestos treatment agent injection mechanism 1 described later can be used to inject the first asbestos treatment agent into a dry structure to be constructed. In this 1st asbestos treatment agent application | coating work step, Z type anchor attachment and anti-falling mesh attachment are performed.

Subsequently, as a coating operation of a 2nd asbestos treatment agent, the base material for a 2nd asbestos treatment agent and a 2nd asbestos treatment is prepared first. Next, a test spray of the second asbestos treatment agent is performed, and the second asbestos treatment agent is sprayed.

Finally, inspect and clean up. In this step, inspection and confirmation of asbestos treatment are carried out, and the substrate is cleaned up. During this inspection and cleanup, post-dust concentration measurements are made.

Fig. 6 shows a specific embodiment of the asbestos treatment agent injection mechanism 1 for press-fitting the first asbestos treatment agent according to the present invention into the existing building structure. The asbestos treatment agent injection mechanism 1 includes a plurality of injection needles 2 which stick inwardly from the surface thereof with respect to the existing dry structure H, and dry the first asbestos treatment agent through the injection needle 2. It consists of injecting pressure into the structure (S). In the example shown in FIG. 6, the some injection needle 2 is fixed with respect to the board | substrate 3, and the 1st asbestos treatment agent from the 1st asbestos processing agent source 4 is attached to the end 2a of the said injection needle 2 Is provided with an inlet 5 for receiving water, and a discharge port 6 for discharging the first asbestos treatment agent is provided at the other end 2b.

On one surface side 3a of the substrate 3, for example, a movable plate 8 driven in an extension direction by a coil spring 7 or the like is combined with a receding material, and the other surface side of the substrate 3 is provided. The handle 9 is attached to 3b. This handle 9 may be comprised by the ball-shaped member as needed.

Next, the structural example to which the net member N was applied about the asbestos processing method using the asbestos processing agent which concerns on this invention is demonstrated in detail in that order.

In this invention, the 1st asbestos processing agent and the 2nd asbestos processing agent preparation process which prepare the 1st asbestos processing agent (Tr-1) and the 2nd asbestos processing agent (Tr-2) which consist of the said structure beforehand are included. In one example, the first asbestos treatment agent is a highly permeable asbestos treatment agent formed by mixing an alkaline aqueous solution or slurry mainly containing metal ions with a vegetable or animal grass, and the second asbestos treatment agent is an alkali containing mainly metal ions. It is an asbestos treatment agent with high sealing property formed by mixing an aqueous solution, a slurry, a vegetable or animal grass, and an organic or inorganic fiber.

The asbestos treatment method according to the present invention includes a first asbestos treatment agent treatment step (see FIG. 2A), a net member installation step (see FIGS. 2B and 2C), and a second asbestos treatment agent treatment step (see FIG. 2D). In the first asbestos treatment agent treatment step, the first asbestos treatment agent prepared in the asbestos treatment agent preparation step is sprayed onto the dry structure H to sufficiently infiltrate the first asbestos treatment agent into the dry structure. In the net member installation step, a net member is installed on the surface of the existing structure structure through the net member installation means 11 by a net member N made of alkali-resistant glass fiber along the surface Ha of the existing structure structure H. do. Next, in the second asbestos treatment agent treatment step, the second asbestos treatment agent prepared in the preparation step is spray-coated from above the net member N provided on the surface of the existing construction structure, and together with the net member N. An asbestos treatment layer 19 covering the existing building structure H is formed. The net member N may be a mesh member. The eye dimension of this net member N is about 3-30 mm.

In this invention, the specific Example of the net member installation means 11 in the said net member installation process is demonstrated in detail. The net member mounting means 11 includes a bent mounting bracket 12 and an anchor bolt 13 as shown in Figs. The attachment bracket 12 includes a base 14 fixed to the surface Ha of the existing construction structure H, and a raised portion 15 extending outwardly from one side 14a of the base 14. And a net catching portion 16 extending in a direction parallel to the base 14 at the upper end of the rising portion 15.

This attachment bracket 12 is fixed to the surface Ha of the existing construction structure H by the attachment screw 18 with respect to the fixing hole 17 provided in the said base 14, for example. The front end 16a side of the net engaging portion 16 in the attachment bracket 12 is designed to be narrowed slightly so that the net N can be caught.

In addition, the attachment bracket 12 can be easily changed as the height dimension h1 or h2 by the external force, as shown in detail in Figures 4B1 and 4B2, by applying an external force. In addition, since the length dimension L from the fixing hole 17 to the tip end 16a of the net engaging portion 16 can be simply changed as the length dimension L1 or L2, the surface Ha of the existing construction structure H is changed. Therefore, the installed net member N can be fixed reliably.

In preparation for this asbestos treatment, preliminary investigations to measure the spray thickness of asbestos structures, cleaning before installation of equipment, fixtures, walls, floors, ceilings, etc. of the surrounding environment, installation of all necessary equipment for asbestos treatment, and the like are performed. . In this preparatory step dust concentration measurements are taken before the operation.

In the application | coating operation of the 1st asbestos treating agent by this invention, the test spray of a 1st asbestos treating agent is first performed, the spray treatment of a 1st asbestos treating agent is performed through a scattering prevention process, and a penetration check is performed. At this stage the concentration of dust in operation is measured. As for the treatment of the first asbestos treatment agent, the asbestos treatment agent injection mechanism 1 described later may be used to inject the first asbestos treatment agent into a dry structure to be constructed.

Subsequently, as a coating operation of a 2nd asbestos treatment agent, the base material for a 2nd asbestos treatment agent and a 2nd asbestos treatment is prepared first. Next, a test spray of the second asbestos treatment agent is performed, and the second asbestos treatment agent is sprayed.

Finally, inspection and cleanup work takes place. In this step, inspection and confirmation of asbestos treatment are performed, and the work of arranging the base materials is performed. During this inspection and cleanup, the concentration of dust after the work is taken.

Moreover, this invention is applicable also to the board | substrate B containing the asbestos fiber component shown, for example in FIG. According to this structural example, asbestos treatment method which encloses the board | substrate B containing an asbestos fiber component in order to prevent deprivation of the asbestos fiber component in the said board | substrate B, mainly hydroxide of metal and / or A step of preparing a highly permeable first asbestos treatment agent comprising a metal salt of a strong base and a weak acid, a natural grass or resin binder, and water, mainly a metal hydroxide and / or a strong base and a metal salt of a weak acid, a natural grass or resin A process of preparing a high sealing property asbestos treatment agent which mixes a binder, aggregate, and water, and the 1st asbestos coating agent which sprays or sprays on the surface of a board | substrate, and penetrates into the board body. Asbestos treatment agent process and the net member N of alkali-resistant glass fiber along the surface Ba of the said board | substrate B through the net member installation means 21, The board | substrate body The net member installation process provided in the surface Ba of (B), and the 2nd asbestos treatment agent are spray-coated from the net member N provided in the surface Ba of the said board | substrate B, and a net member ( N) and the 2nd asbestos treatment agent process process which covers the surface Ba of the board | substrate B together.

In this configuration example, the net member mounting means 21 includes a dedicated screw 23 used together with a relatively large washer 22, and the net member is inserted by inserting the dedicated screw 23. It is possible to fix (N) to the surface Ba of the board body B. In this example, the board body B is a calcium silicate plate.

Fig. 1 shows the processing procedure of an asbestos treatment agent for a dry structure containing asbestos fibers, Fig. 1A is a schematic view showing a state before treatment with the asbestos treatment agent, and Fig. 1B is a first asbestos treatment agent (Tr-1). 1C is a schematic diagram showing a state after spraying the second asbestos treatment agent (Tr-2).

Fig. 2 shows the order of the asbestos treatment method using the asbestos treatment agent according to the present invention. Fig. 2A is a schematic view showing the penetration situation by spray coating of the first asbestos treatment agent on the dry structure H, and Fig. 2B is attached. Fig. 2C is a schematic diagram showing the installation of the bracket, and Fig. 2C is a schematic diagram showing the state in which the net member is provided along the surface of the dried structure, and Fig. 2D is a schematic diagram showing the formation state of the asbestos treatment layer by spray coating of the second asbestos treatment agent.

Fig. 3 shows a specific example of the net member mounting means in the asbestos treatment method using the asbestos treatment agent according to the present invention. Fig. 3A is a schematic view showing an example of a mounting bracket, and Fig. 3B is mixed in a second asbestos treatment agent. It is a schematic diagram which shows the state which the organic or inorganic short fiber and / or long fiber which were made intertwined with the net member.

Fig. 4 shows an example of the mounting bracket in the net member mounting means, and Fig. 4A is a perspective view showing an example of the mounting bracket, and Figs. 4B1 and 4B2 are perspective views of a state in which the mounting bracket is deformed by applying an external force. .

5 is a schematic perspective view showing an example in which the asbestos treatment method using the asbestos treatment agent according to the present invention is applied to a board body.

Fig. 6 is a schematic sectional view showing the principal parts of a specific embodiment of an asbestos treatment agent injection mechanism 1 for press-fitting the first asbestos treatment agent according to the present invention into a dry structure.

Explanation of the sign

One… Asbestos treatment agent

2… Injection needle

2a... One end of the needle

2b... The other end of the needle

3... Board

4… Asbestos Treatment Specifications

5... Inlet port of injection needle

6... Discharge port of injection needle

7... Coil spring

8… Movable plate

9... handle

F… Skeleton of rebar

As… Asbestos Construction Floor

H… Existing building structure

Ha… Surface of existing building structure

Tr-1... Asbestos treatment agent

Tr-2... 2nd asbestos treatment agent

11... Net member mounting means

12... Attachment bracket

13... Anchor bolt

14... Donation of attachment bracket

15... Rise

16... Net jam

17... Fastener

18... Attachment screw

19... Asbestos Treatment Layer

N… Net member

20... Short or long fiber

B… Bodce

Ba… The surface of a board

21... Net member mounting means

22... Relatively large washers

23... Dedicated screw

Claims (17)

An asbestos treating agent encapsulated in an existing building structure including asbestos fibers to prevent scattering and deprivation of asbestos fiber components in the existing building structure, A first asbestos treatment agent having a high permeability mainly formed by mixing a metal hydroxide and / or a strong base and a metal salt of a weak acid, natural grass or a resin binder, and water; It is mainly composed of a combination of a metal hydroxide and / or strong base and a metal salt of weak acid, natural grass or resin binder, aggregate and a second high asbestos treatment agent formed by mixing water, The first asbestos treatment agent is made of a highly permeable treatment agent that penetrates into the interior of the existing dry structure including the asbestos fibers by coating or spraying, to form an organometallic compound after drying, The asbestos treatment agent, characterized in that the second asbestos treatment agent comprises a treatment agent having a high sealing property suitable for spraying and solidifying the surface of the existing dried structure after the treatment of the first asbestos treatment agent. The method of claim 1, The first asbestos treatment agent has a permeability formed by mixing 0.1 to 2% by weight of a metal hydroxide and / or a strong base and a metal salt of a weak acid, 0.5 to 20% by weight of a natural grass or resin binder, and 78 to 99% by weight of water. High asbestos treatment agent, The second asbestos treating agent is 20 to 50% by weight of metal hydroxide and / or strong base and a weak acid metal salt, 0.5 to 10% by weight of natural grass or resin binder, 1 to 10% by weight of aggregate, and 25 to 75% by weight An asbestos treatment agent characterized in that it is an asbestos treatment agent having a high sealing property formed by mixing% water. The method according to claim 1 or 2, An asbestos treatment agent comprising 0.01 to 5% by weight of organic or inorganic short fibers and / or long fibers in the second asbestos treatment agent. The method of claim 3, wherein The organic or inorganic fibers are asbestos treatment agents, characterized in that natural fibers such as hemp, manila hemp or cellulose, organic fibers such as rayon, nylon, polypropylene or aramid fibers, or inorganic fibers such as glass fibers or carbon fibers. The method according to any one of claims 1 to 4, An asbestos treatment agent, characterized in that the vegetable or animal oil is added to the asbestos treatment agent. The method of claim 5, wherein The asbestos treating agent, characterized in that the vegetable or animal oil is vegetable oil such as vegetable oil, sesame oil, soybean oil or palm oil, or animal oil such as fish oil. The method according to any one of claims 1 to 6, The metal hydroxide is potassium hydroxide, magnesium hydroxide or aluminum hydroxide, the metal salt of the strong base and the weak acid is calcium carbonate, magnesium carbonate, calcium silicate or magnesium silicate.  The method according to any one of claims 1 to 7, The asbestos treating agent, characterized in that the vegetable or animal grass is a vegetable grass such as starch, ginkgo or azuki bean, or an animal grass such as gelatin, collagen or glue. The method according to any one of claims 1 to 8, An asbestos treatment agent comprising the addition of natural rubber or synthetic rubber to the asbestos treatment agent. An asbestos treatment method using an asbestos treatment agent enclosed in an existing building structure including asbestos fibers to prevent scattering and deprivation of asbestos fiber components in the existing building structure, A process of preparing a highly permeable first asbestos treatment agent mainly comprising a metal hydroxide and / or a strong base and a metal salt of a weak acid, a natural grass or a resin binder, and water;  A process of preparing a second asbestos treatment agent having a high sealing property mainly formed by mixing metal hydroxides and / or strong bases and metal salts of weak acids, natural grass or resin binders, aggregates, and water; A first asbestos treatment agent treatment step of applying or spraying the first asbestos treatment agent onto the surface of the existing building structure to penetrate the inside of the existing building structure; Next, the asbestos treatment method using an asbestos treatment agent comprising a second asbestos treatment agent treatment step of spray-coating the second asbestos treatment agent on the surface of the existing construction structure to cover the existing construction structure. The method of claim 10, And a net member installing step of installing, on the surface of the existing building structure, a member of the alkali-resistant glass fiber along the surface of the existing building structure after the first asbestos treatment agent through the member mounting means. An asbestos treatment method, characterized in that the second asbestos treatment agent is spray-coated from above the net member provided on the surface of the building structure to cover the existing building structure together with the net member. The method of claim 11, The net member installation means comprises a bent attachment bracket, wherein the attachment bracket is fixed to the surface of the existing building structure, a rising portion extending outward from one side of the base portion, and the rising portion An asbestos processing method, characterized in that it has a net engaging portion extending in a direction parallel to the base at the top. The method according to claim 11 or 12, And said net member mounting means comprises a dedicated screw used together with a relatively large washer, said asbestos processing method comprising fixing said net member to the surface of said board body by said dedicated screw. Asbestos treatment method for sealing a board body containing an asbestos fiber component in order to prevent the desorption of asbestos fiber component in the board body, A process of preparing a highly permeable first asbestos treatment agent mainly comprising a metal hydroxide and / or a strong base and a metal salt of a weak acid, a natural grass or a resin binder, and water; A process of preparing a second asbestos treatment agent having a high sealing property mainly formed by mixing metal hydroxides and / or strong bases and metal salts of weak acids, natural grass or resin binders, aggregates, and water; A first asbestos treatment agent treatment step of applying or spraying the first asbestos treatment agent on the surface of the board body to penetrate the inside of the board body; A net member installation step of installing an alkali-resistant glass fiber net member along the surface of the board body on the board body surface through a net member mounting means; A asbestos treatment method comprising: a second asbestos treatment agent treatment step of spray-coating the second asbestos treatment agent on the net member provided on the board body surface to cover the board body together with the net member. The method according to claim 10 to 14, The first asbestos treatment agent has a high permeability formed by mixing a metal salt of 0.1 to 2% by weight of metal hydroxide and / or a strong base and a weak acid, 0.5 to 20% by weight of natural grass or resin binder, and 78 to 99% by weight of water. Asbestos treatment agent, The second asbestos treatment agent is 20 to 50% by weight of metal hydroxide and / or strong base and a weak acid metal salt, 0.5 to 10% by weight of natural grass or resin binder, 1 to 10% by weight of aggregate, and 25 to 75% by weight It is an asbestos treatment agent with high sealing property formed by mixing% water. The asbestos processing method characterized by the above-mentioned. The method of claim 15, An asbestos treatment method comprising a mixture of 0.01 to 5% by weight of organic or inorganic short fibers and / or long fibers to the second asbestos treatment agent. The method according to any one of claims 10 to 16, The asbestos treatment agent injection mechanism is provided with the asbestos treatment agent injection mechanism for the injection treatment in the treatment with the first treatment agent, and the asbestos treatment agent injection mechanism is provided with a plurality of injection needles inserted into the structure structure from the surface thereof through the injection needle. An asbestos treatment method comprising the injection of the asbestos treatment agent into the dried structure.

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