JP2012017592A - Method for feeding acid chemical liquid and method for removing asbestos-containing sprayed material thereby - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for feeding acid chemical liquid and a method for removing asbestos-containing sprayed material with a simple operation in a reduced time, even in a narrow working space or for a base material having a complicated shape.SOLUTION: A method for feeding acid chemical liquid to an asbestos-containing sprayed material 2 sprayed on a surface of a base material 1 comprises the successive steps of arranging a liquid absorbing material 3 to be impregnated with an acid liquid T on a surface 2a of the asbestos-containing sprayed material 2 and spraying the acid chemical liquid T onto the liquid absorbing material 3 for impregnation, so that the asbestos-containing sprayed material 2 is impregnated with the acid chemical liquid T.

Description

  The present invention relates to a method for supplying an acidic chemical solution to an asbestos-containing spray material sprayed on the surface of a substrate and a method for removing an asbestos-containing spray material using the same.

  Conventionally, as an asbestos-containing spray material such as sprayed asbestos material or sprayed rock wool containing asbestos, after removing it roughly with a tool such as a keren rod, for example, residual deposits mainly composed of cement components using a brush etc. The work of shaving off and polishing is being carried out. For example, Patent Documents 1 to 3 disclose a removal method that uses a removal device or the like as a removal method with higher work efficiency than in the case of human power.

  Patent Document 1 is provided with a brush and a scraper that are appropriately driven in a bucket provided at the tip of a manipulator, and the brush and scraper are operated and peeled in the state in which the opening of the bucket is pressed against the asbestos surface. It describes an apparatus for processing by dropping asbestos into a bucket as it is and transferring it from the bucket to a processing container or the like.

  In Patent Document 2, a cut brush (peeling means) for peeling the asbestos-containing material, an inner hood that surrounds the peeling means, an outer hood that surrounds the inner hood, and a treatment tank for removing the asbestos-containing material from the inner hood. An asbestos removing device having a suction means for sucking into the air is disclosed.

Patent Document 3 discloses a method for supplying a sprayed asbestos remover to asbestos from a hooded nozzle and a method for removing asbestos by supplying the asbestos remover.
In this method, a spray-like remover sprayed from the nozzle header is sprayed onto asbestos for a predetermined time (several minutes) and then pressed, and then the nozzle header hood is applied to another location, and the same operation is repeated. And after repeating the same operation | work to the sprayed asbestos between 2-3 m, asbestos is removed mechanically with a spatula etc.

JP 2001-104122 A JP-A-8-199832 JP 2008-253857 A

However, the conventional asbestos removal method has the following problems.
That is, in the asbestos removal method using the asbestos removal apparatus as shown in Patent Documents 1 and 2, the work space where the apparatus cannot be installed is a narrow place, or a complicated shape such as an H-shaped steel material is used. It has been difficult to use an asbestos removal apparatus for the base material coated with an asbestos-containing spray material. For this reason, under conditions where it is difficult to apply such a removal apparatus, there is a current situation in which it is necessary to rely on a removal method by human power, and there is a problem that it takes time and work.

Moreover, in the asbestos removal agent supply method and the asbestos removal method shown in Patent Document 3, it is necessary to repeat the operation of applying the nozzle header and the hood for several minutes while spraying the removal agent on the spray to the asbestos. There was a problem that it took excessive labor.
In addition, in this method, the asbestos removing agent cannot be sufficiently permeated into the asbestos and the peeling work is performed, and there is a problem that asbestos is left behind.

  The present invention has been made in view of the above-mentioned problems, and can reduce the working time by a simple work, and even if the narrow work space and the base material shape are complicated, the asbestos-containing spray material can be used. It aims at providing the removal method of the acidic chemical | medical solution supply method and the asbestos containing spraying material which can be removed reliably.

  In order to solve the above-mentioned problem, an acidic chemical solution supply method for an asbestos-containing spray material according to the present invention is an acidic chemical solution supply method for an asbestos-containing spray material sprayed on the surface of a substrate, and permeates the acidic solution. After the liquid absorbing material to be disposed on the surface of the asbestos-containing spray material, the acidic chemical liquid is sprayed and permeated into the liquid absorbent material, and the acidic chemical liquid is permeated into the asbestos-containing spray material. .

  The present invention fills the liquid-absorbing material with an acidic chemical solution and places it on the surface of the asbestos-containing spray material, and arranges the liquid-absorbing material until the acidic chemical solution reaches the boundary between the base material and the asbestos-containing spray material. Therefore, it is possible to supply the acidic chemical liquid to the asbestos-containing spray material reliably and efficiently with minimum human burden.

  In addition, after the liquid absorbent material is placed on the asbestos-containing spray material, an acidic chemical solution is sprayed onto the liquid absorbent material, so that the liquid absorbent material can be easily deployed on the asbestos-containing spray material to absorb the acidic chemical solution. Since it can be easily contained in the liquid material as much as possible, there is an effect that the work of arranging the liquid absorbent material infiltrated with the acidic chemical liquid on the asbestos-containing spray material becomes efficient. In addition, after the acidic chemical solution has started to penetrate into the asbestos-containing spray material, the acidic chemical solution is additionally included in the absorbent material so that the acidic chemical solution can penetrate into the entire asbestos-containing spray material. There is an effect that can be.

  An acidic chemical solution supply method for an asbestos-containing spraying material according to the present invention is an acidic chemical solution supply method for an asbestos-containing spraying material sprayed on the surface of a substrate, and the liquid absorbent material infiltrated with the acidic chemical solution is treated with asbestos. It arrange | positions on the surface of a containing spraying material, and makes the said acidic chemical | medical solution osmose | permeate the said asbestos containing spraying material, It is characterized by the above-mentioned.

According to the present invention, the liquid absorbent material infiltrated with the acidic chemical liquid is disposed on the surface of the asbestos-containing spray material, and the acidic chemical liquid is infiltrated into the asbestos-containing spray material. It is possible to reliably and uniformly supply the acidic chemical solution, and to perform an operation of supplying the acidic chemical solution to the asbestos spraying material easily and at low cost.
In addition, it is only necessary to continue the arrangement of the liquid absorbent material until the acidic chemical reaches the boundary between the base material and the asbestos-containing spray material. There exists an effect that it can supply to a spray material containing asbestos.

Moreover, in the acidic chemical | medical solution supply method with respect to the asbestos containing spraying material which concerns on this invention, you may inject | pour an acidic chemical | medical solution between a base material and an asbestos containing spraying material.
By injecting the acidic chemical solution between the base material and the asbestos-containing spray material (adhesive surface), it takes time for the acidic chemical solution to penetrate. An acidic chemical solution can be supplied, and the efficiency of the supply of the acidic chemical solution to the asbestos-containing spray material can be increased.

Moreover, in the acidic chemical solution supply method for the asbestos-containing spray material according to the present invention, after the liquid-absorbing material is arranged on the surface of the asbestos-containing spray material, the adherence of the liquid-absorbing material to the asbestos-containing spray material is maintained. It is desirable to arrange a holding material.
Even if the liquid absorbent material arranged on the surface of the asbestos-containing spray material is made to absorb acid chemical liquid by arranging a holding material that maintains the adhesion of the liquid absorbent material to the asbestos-containing spray material, It is possible to maintain a state in close contact with the surface of the asbestos-containing spraying material without bending the liquid-absorbing material, and it is possible to efficiently infiltrate the acidic chemical liquid into the asbestos-containing spraying material.

It is more preferable that the holding material is made of a water-permeable sheet-like net member and is disposed on the surface of the liquid-absorbing material.
By disposing a holding material made of a sheet-like net member having water permeability on the surface of the liquid-absorbing material, the liquid-absorbing material is pressed from the surface side by the holding material made of the sheet-like net member. It is reliably held and the adhesion to the asbestos-containing spray material can be enhanced.

  Moreover, in the method for removing asbestos-containing spraying material according to the present invention, as described above, since the acidic chemical liquid can be reliably supplied to the asbestos-containing spraying material, the entire asbestos-containing spraying material is surely dissolved, There is an effect that it can be naturally dropped and removed so that there is almost no adhesion remaining on the substrate. In addition, as described above, the supply of the acidic chemical solution can be simplified by reducing the human burden, so rough removal was performed with a conventional removal robot equipped with a large removal device or manipulator or a keren rod. There is an effect that it is possible to easily and efficiently remove the asbestos-containing spraying material without requiring time-consuming work such as polishing afterwards.

Moreover, since it is a method of arrange | positioning a water absorptive raw material, the asbestos containing spraying material with which the narrow work space and the base material were provided in complicated shapes, such as a H-type steel material and a volt | bolt, can be removed easily. There is an effect.
Furthermore, when an acidic chemical solution is injected between the base material and the asbestos-containing spraying material, the entire asbestos-containing spraying material can be quickly dissolved and dropped naturally. There exists an effect that work efficiency can be raised further.

  According to the acidic chemical solution supply method for the asbestos-containing spray material of the present invention, the liquid absorbent material infiltrated with the acidic chemical solution is disposed on the surface of the asbestos-containing spray material, and the acidic chemical solution is placed inside the asbestos-containing spray material. Since it is infiltrated, it is possible to reliably and uniformly supply the acidic chemical liquid to the asbestos-containing spray material, and to perform the supply operation of the acidic chemical liquid to the asbestos spray material easily and at low cost. There is an effect that can be done. In addition, the removal of the asbestos-containing spraying material is easy and efficient, and the asbestos-containing spraying material provided in a narrow work space, for example, a complex shaped object such as an H-shaped steel material or a bolt, is reliably and It can be easily removed.

These are the figures for demonstrating schematic structure of the supply method of the acidic chemical | medical solution with respect to the asbestos containing spraying material by the 1st Embodiment of this invention. These are the figures for demonstrating schematic structure of the supply method of the acidic chemical | medical solution with respect to the asbestos containing spraying material by the 2nd Embodiment of this invention. FIG. 3 is an enlarged view of the syringe shown in FIG. 2. FIG. 3 is an enlarged view showing a needle hole of the syringe shown in FIG. 2. These are figures which show the supply operation state of the acidic chemical | medical solution with respect to the asbestos containing spraying material by the 2nd Embodiment of this invention.

The first embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the method for removing the asbestos-containing spray material according to the present embodiment is a surface of a base material 1 composed of a reinforced concrete slab 1A such as a building or an H-shaped steel material 1B that supports the slab 1A from below. Asbestos-containing spray material (hereinafter, simply referred to as “asbestos-containing material”) 2 coated on the surface is applied. The base material 1 is in a state where the lower surface of the slab 1A is sprayed together with the H-type steel material 1B by, for example, an asbestos-containing material 2 having a spray thickness of about 25 to 60 mm.

  Examples of the asbestos-containing material 2 include a sprayed asbestos material and an asbestos-containing sprayed rock wool.

  The asbestos-containing material 2 is removed by placing the liquid-absorbing material 3 in close contact with the support 4 and the giant clam vise 5 and injecting the acidic chemical liquid T into the hand-held injection jig 7. 8 is directed toward the liquid-absorbing material 3 to spray the acidic chemical liquid T, the liquid-absorbing raw material 3 is filled with the acidic chemical liquid T, and the acidic chemical liquid T is permeated into the asbestos-containing material 2 from the liquid-absorbing material 3. By causing the chemical solution T to react with and dissolve the asbestos-containing material 2, the asbestos-containing material 2 is naturally dropped while being peeled from the substrate 1.

  The liquid-absorbing material 3 has a function of absorbing the acidic chemical liquid T and holding it inside the liquid-absorbing material 3. For example, a material made of a porous synthetic resin material or a fiber fabric such as cotton is used. Preferably used. Specifically, a material having a high liquid-absorbing property such as sponge material or towel cloth and having flexibility, for example, a member formed in a panel shape having a thickness of 10 mm to 500 mm is more preferably used.

  For example, when a holding material 6 made of a sheet-like net member such as a lath net or a saran net is arranged and fixed on the surface of the liquid-absorbing material 3, the liquid-absorbing material 3 contains an acidic chemical solution. It is designed not to be bent by its own weight.

  The support 4 is used to support the liquid-absorbing material 3 arranged on the surface of the slab 1A, and the giant clam vise 5 supports the liquid-absorbing material 3 arranged on the surface of the H-type steel material 1B. It is used for.

  As the acidic chemical liquid T, for example, a mineral acid such as hydrochloric acid, or an organic acid aqueous solution such as acetic acid or citric acid is used. This acidic chemical liquid T has a function of reacting with and dissolving the asbestos-containing material 2, and is for causing separation from the base material 1 by allowing it to penetrate into the asbestos-containing material 2, For example, the PH value is adjusted to about 1 to 4 according to conditions such as the material of the asbestos-containing material 2, its spraying thickness dimension, and the material of the base material 1.

  The injection jig 7 for injecting the acidic chemical T toward the asbestos-containing material 2 can suck an appropriate amount of the acidic chemical T, and includes a gun body 9, a support rod 10 extended from the gun body 9, The ejection head 8 provided at the tip 10a of the support bar 10 is provided.

The gun body 9 is connected to a chemical solution tank 11 for storing the acidic chemical solution T by a liquid feed pipe 12, and operates a pressure feed pump 13 connected to the liquid feed pipe 12 by operating an operation unit. The acidic chemical liquid T is delivered to the ejection head 8 side.
The support rod 10 has a flow path inside, and communicates with the liquid feed tube 12 via the gun body 9. An ejection head 8 having a plurality of ejection holes (not shown) is provided at the distal end portion 10 a of the support rod 10. These injection holes communicate with the flow path of the acidic chemical liquid T in the head 7 and are configured to inject the acidic chemical liquid T delivered from the gun body 9 toward the liquid absorbent material 3.

Next, the method for removing the asbestos-containing material 2 will be described more specifically based on the drawings.
First, as shown in FIG. 1, for example, a scattering inhibitor such as Astector S (registered trademark) is sprayed on the surface 2 a of the asbestos-containing material 2 to be removed.
And the liquid-absorbing raw material 3 is arrange | positioned on the surface of the asbestos containing material 2 currently sprayed on 1 A of slabs, and the H-type steel material 1B without substantially clearance. The holding material 6 is arranged and fixed on the surface of the liquid-absorbing material 3 so as not to bend, and is further fixed by the support 4 and the shrimp vise 5. In addition, the support work 4 and the giant clam vise 5 are arranged at regular intervals so that the liquid-absorbing material 3 does not bend in a state containing the acidic chemical liquid T.

  In this state, the injection jig 7 connected to the chemical tank 11 is used to direct the injection head 8 toward the liquid-absorbing material 3. Then, the operation part of the injection jig 7 is operated to inject the acidic chemical liquid T from the plurality of injection holes, and the acidic chemical liquid T is sprayed and held on the entire liquid absorbent material 3.

  Then, the liquid absorbent material 3 is placed in a state where it is filled with the acidic chemical solution T, and waits for the acidic chemical solution T held in the liquid absorbent material 3 to migrate to and penetrate into the asbestos-containing material 2. At this time, depending on the spraying thickness of the asbestos-containing material 2, the liquid chemical 3 is appropriately supplemented with the acidic chemical liquid T, and the acidic chemical liquid T is sufficiently distributed throughout the asbestos-containing material 2.

When the acidic chemical T spreads from the inside of the asbestos-containing material 2 to the boundary with the base material 1, the cement and the organic matter of the asbestos-containing material 2 are decomposed and dissolved by a chemical reaction with an acid. It can be peeled off at the interface with 1A and H-shaped steel 3 and allowed to fall naturally. Then, the dropped asbestos-containing material 2 is removed by an appropriate recovery means.
In addition, in this Embodiment, since the scattering inhibitor is sprayed on the surface 2a of the asbestos-containing material 2 in advance, the asbestos scattering that occurs when the asbestos-containing material 2 peels and falls can be suppressed.

  As described above, according to the method for supplying the acidic chemical liquid 3 to the asbestos-containing material 2 and the method for removing the asbestos-containing material 2 according to the present embodiment, the liquid-absorbing material 3 is disposed on the surface of the asbestos-containing material 2. Since the acidic chemical solution T is infiltrated into the asbestos-containing material 2 by infiltrating the acidic chemical solution T into the asbestos-containing material 2, the acidic chemical solution T is dissolved and removed, so that the supply of the acidic chemical solution T to the asbestos-containing material 2 is simple. In addition, the asbestos-containing material 2 can be removed easily and in a short time. Further, the asbestos-containing material 2 provided in a narrow work space or a complicated shape such as an H-shaped steel material or a bolt can be easily removed.

  Moreover, the asbestos-containing material 2 is filled by filling the liquid absorbent material 3 with the acidic chemical solution T and arranging it on the surface of the asbestos-containing material 2 and allowing the acidic chemical solution T to penetrate to the boundary between the base material 1 and the asbestos-containing material 2. While being able to fall naturally, it becomes possible to remove so that there is almost no adhesion residue with respect to the base material 1. FIG.

  In addition, the liquid absorbent material 3 can be easily disposed on the asbestos-containing material 2, and the acidic chemical liquid T can be included in the liquid absorbent material 3 as much as possible. The arrangement | positioning work to the asbestos-containing material 2 of the permeated liquid-absorbing material 3 becomes efficient. In addition, after the acidic chemical liquid T starts to permeate the asbestos-containing material 2, the acidic chemical liquid T is additionally contained in the absorbent material 3, and the acidic chemical liquid T is sufficiently permeated throughout the asbestos-containing material 2. be able to.

In the present embodiment, the acidic chemical liquid T is absorbed after the liquid-absorbing material 3 is disposed on the surface 2a of the asbestos-containing material 2. However, the liquid-absorbing material 3 is not limited to this. The liquid absorbent material 3 may be placed in contact with the surface 2 a of the asbestos-containing material 2 after the acidic chemical liquid T is absorbed.
Thus, when the acidic chemical liquid T is included in the liquid absorbent material 3 before being disposed on the surface 2 a of the asbestos-containing material 2, the effect that the acidic chemical liquid T can be supplied to the liquid absorbent material 3 without waste is obtained.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
The second embodiment of the present invention is characterized in that the acidic chemical liquid T is injected into the bonding surface between the base material 1 and the asbestos-containing material 2 before the liquid-absorbing material 3 is arranged on the surface of the asbestos-containing material 2. It is what.

  As shown in FIG. 2, the asbestos-containing material 2 is the same as that shown in the first embodiment, and its strength is usually such that an injection needle 21 of a syringe 20 described later can be inserted. It is material strength.

  As shown in FIG. 3, a syringe (injector) 20 for injecting the acidic chemical liquid T into the adhesive surface 1a can suck an appropriate amount of the acidic chemical liquid T, and includes a main body 22 including a syringe and a plunger, and an injection needle. 21 and can be held in a known form. As shown in FIG. 4, the injection needle 21 in the syringe 20 is formed with a lateral hole 21 b in which the needle hole of the distal end portion 21 a is opened sideways. That is, since the needle hole of the injection needle 21 is opened sideways, when the injection needle 21 is inserted into the asbestos-containing material 2, the asbestos-containing material 2 enters the needle hole, causing clogging, and the injection of the acidic chemical solution T is performed. It has a structure that can prevent problems such as obstruction.

A more specific method for removing the asbestos-containing material 2 will be described with reference to FIG. Here, in FIG. 5, only the injection needle 21 of the syringe 20 is displayed, and the injection needle 21 is described at each injection position.
First, for example, a scattering inhibitor 25 such as ASTECTOR S (registered trademark) is sprayed on the surface 2a of the asbestos-containing material 2 to be removed. Next, using the syringe 20 shown in FIGS. 3 and 4 in which the acidic drug solution T is sucked, the tip 21a (lateral hole 21b) of the injection needle 21 is at an appropriate injection position (near the adhesive surfaces 1b and 1c). Then, the acidic chemical solution T is injected. The injection by the syringe 20 is performed manually.

  At this time, the acidic chemical solution T is injected at a predetermined interval. For example, at a location where the shape of the base material 1 such as the H-shaped steel 1B is complicated, the location is higher than the location where the shape is flat. By increasing the flow rate and reducing the injection interval and intensively injecting, the acidic chemical solution T can be infiltrated over the entire adhesive surface at that location, and the asbestos-containing material 2 can be reliably peeled from the base material 1. . Here, the symbol R1 indicates the first injection region in the flat portion (the bonding surface 1b between the slab 1A and the asbestos-containing material 2), and the symbol R2 indicates the adhesion between the complicated shape portion (the H-shaped steel material 1B and the asbestos-containing material 2). The second implantation region in the surface 1c) is shown.

  Next, in the same manner as shown in the first embodiment in FIG. 1, the liquid-absorbing material 3 and the holding material 6 are arranged on the surface of the asbestos-containing material 2 and supported by the support 4 and the giant clam vise 5. After that, the acidic chemical liquid T is jetted onto the surface of the holding material 6 on the liquid absorbent material 3 by the injection jig 7 to absorb the liquid, and the asbestos-containing material 2 is infiltrated with the acidic chemical liquid T.

  As described above, the asbestos-containing material 2 is quickly soaked with the acid on both sides by impregnating the acidic chemical solution T from both the adhesive surface 1a of the asbestos-containing material 2 with the material 1 and the both surfaces of the asbestos-containing material 2. The asbestos-containing material 2 peels off from the base material 1 and further falls naturally. At this time, the adhesive surface 1a between the base material 1 and the asbestos-containing material 2 is in a state in which the asbestos-containing material 2 is hardly left behind because the asbestos-containing material 2 is peeled off due to dissolution and dropped. . The dropped asbestos-containing material 2 can be removed by an appropriate recovery means, and the removal operation of the asbestos-containing material 2 can be completed. Here, in this Embodiment, since the scattering inhibitor 25 is previously sprayed on the surface 2a of the asbestos-containing material 2, the asbestos scattering that occurs when the asbestos-containing material 2 peels and falls can be suppressed.

  As described above, after injecting the acidic chemical solution T between the base material 1 and the asbestos-containing material 2 (adhesion surface), the acidic chemical solution T is also infiltrated from the surface 2a of the asbestos-containing material 2 to penetrate. It is possible to quickly dissolve the vicinity of the adhesion surface 1a between the difficult asbestos-containing material 2 and the substrate 1, and it is possible to further accelerate the peeling of the entire asbestos-containing material 2 and to improve the removal work efficiency.

  As mentioned above, although embodiment of the removal method of the asbestos containing material 2 by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.

  For example, although the syringe 20 is used in the present embodiment, the present invention is not limited to this. For example, the injection device is a pistol-like injection device having a needle hole for injection, and the injection device supplies the acidic drug solution T. The thing of the structure connected with the front-end | tip part of the hose connected to the container to accommodate may be sufficient. In short, any injection tool that is hand-held, lightweight, small, can be easily carried even in a narrow work space, and can be easily handled in the work space at the injection site, is acceptable. is there. When a syringe is used, it may be an injection needle having a hole in the direction of the normal needle axis as well as the needle hole having a lateral opening as in the present embodiment.

  In addition, the kind, the injection amount, the injection position, the injection interval, etc. of the acidic chemical liquid T are appropriately determined according to the conditions such as the material of the asbestos-containing material, the thickness dimension of the spraying material, the material of the base material, etc. Can be set.

Alternatively, the liquid absorbent material 3 may be placed in contact with the surface 2 a of the asbestos-containing material 2 after the acidic chemical liquid T is absorbed by the liquid absorbent material 3.
When the acidic chemical liquid T is included in the liquid absorbent material 3 before being disposed on the surface of the asbestos-containing material 2, an effect that the acidic chemical liquid T can be supplied to the liquid absorbent material 3 without waste is obtained.

DESCRIPTION OF SYMBOLS 1 Base material 2 Asbestos containing spraying material 2a Surface 3 Liquid absorbing material 6 Holding material T Acidic chemical | medical solution

Claims (6)

An acidic chemical supply method for an asbestos-containing spray material sprayed on the surface of a substrate,
After placing the liquid absorbent material that permeates the acidic liquid on the surface of the asbestos-containing spray material, spray the acidic chemical liquid to the liquid absorbent material to penetrate,
An acidic chemical solution supply method, wherein the acidic chemical solution is infiltrated into the asbestos-containing spray material. An acidic chemical supply method for an asbestos-containing spray material sprayed on the surface of a substrate,
A liquid-absorbing material infiltrated with acidic chemicals is placed on the surface of the asbestos-containing spray material,
An acidic chemical solution supply method, wherein the acidic chemical solution is infiltrated into the asbestos-containing spray material.   The method of supplying an acidic chemical solution according to claim 1, further comprising a step of injecting an acidic chemical solution between the base material and the asbestos-containing spray material.   2. A holding material that maintains adhesion of the liquid-absorbing material to the asbestos-containing spraying material is disposed after the liquid-absorbing material is disposed on the surface of the asbestos-containing spraying material. 4. The method of supplying an acidic chemical solution according to any one of items 1 to 3.   5. The acidic chemical solution supply method according to claim 1, wherein the holding material is made of a water-permeable sheet-like net member and disposed on a surface of the liquid-absorbing material. .   The removal method of the asbestos containing spraying material made using the acidic chemical | medical solution supply method of any one of Claim 1 to 5.

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