JP2015057538A - Method in which waterproof material is used as floor curing material upon asbestos processing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method in which waterproof material is used as floor curing material upon asbestos processing in which damage in the floor curing material is certainly prevented upon the asbestos processing.SOLUTION: Poly sheet as conventional curing material is material which is damaged when it is used on floor, thus unsuitable as floor curing material upon recent asbestos processing in which water is utilized. On the contrary, when synthetic macromolecule type roofing sheet or building coating film waterproof material are used as floor curing material upon asbestos processing, floor surface curing is realized in which curing operation is easy and no damage is provided by operator's behavior, movement etc.

Description

  The present invention relates to a method of using a waterproof material for isolating and sealing a removal work area in asbestos treatment as a floor curing material for asbestos treatment.

In buildings constructed in the Showa era, asbestos (asbestos) was used as fireproof covering materials such as room ceilings, walls or steel frames, heat insulating materials, sound absorbing materials, heat insulating materials and the like. In addition, most of the chimneys of cylindrical structures connected to boilers or the like have been provided with asbestos-containing lining materials (chimney asbestos heat insulating materials) formed in a compressed cylinder shape by a binder on the inner wall of the chimney.
However, asbestos is currently in the direction of use restriction because it is known that inhaling asbestos causes malignant mesothelioma. Moreover, about the building which uses asbestos, the dismantling of a building or the processing of asbestos is performed.

  In the asbestos treatment of buildings, a curing work is performed to isolate and seal the removal work area in order to prevent the asbestos fibers generated during the work such as asbestos removal from diffusing out of the removal work area. Currently, when curing the removal work area, a polyethylene sheet or a plastic sheet (hereinafter referred to as “poly sheet”) having a thickness of 0.08 mm or more is used as a curing material for the ceiling and walls. As the curing material for the floor surface, a laminate of two 0.15 mm thick polyethylene sheets or plastic sheets (that is, a 0.3 mm thick poly sheet) is used. Moreover, the joint part of a poly sheet is adhere | attached with cloth adhesive tape, and a work area is isolated and sealed (nonpatent literature 1, 2).

“Revised Existing Asbestos Dust Spattering Prevention Technology Guidelines / Explanation 2006”, Japan Architecture Center, November 20, 2006, p. 59-61 “Exposure Prevention Manual for Asbestos Dust in Construction of Demolition of Revised Buildings”, Planning and Development Division, Japan Industrial Safety and Health Association, March 26, 2008, p. 46-49

  After processing the asbestos, the contaminated polysheet is packaged in a disposal bag and discarded based on the treatment specified in the Waste Management Law. In other words, the curing with the poly sheet is a temporary isolation sealing curing only during the work.

  In addition, the polysheet may be damaged by stepping on sand dust or the like mixed with the asbestos that has fallen on the polysheet on the floor during the asbestos treatment work, or by dropping the tool. In this case, asbestos dust leaks out of the work area from the damaged part (small hole) of the floor surface, so that the work area (space) cured with polysheet is made negative and the asbestos dust leaks to the outside. A negative pressure dedusting device is installed.

However, some recent asbestos treatments use a large amount of an asbestos scattering inhibitor for moistening (including wet water) in order to enhance the prevention of scattering of asbestos fibers. There is also a method of removing asbestos-containing lining material in the chimney by spraying ultrahigh pressure water (for example, asbestos treatment by an apparatus disclosed in Japanese Patent Application Laid-Open No. 2008-149264). In recent asbestos treatments that use a large amount of water, there are cases in which concrete fragments of the deteriorated chimney inner wall removed by contaminated water containing a large amount of asbestos fibers or ultra-high pressure water fall on the polysheet on the floor.
In asbestos treatment, workers perform removal work on the floor in the work area. During the work, when the worker steps on sand dust or concrete debris mixed in asbestos, or when the tool is dropped, the worker's behavior may cause damage to the polysheet on the floor. Conventionally, when the policy is damaged, the work is stopped and the work is started after the damaged portion is joined (adhered) with the cloth adhesive tape. There are also means for curing polysheets in double and triple layers, but they have not been able to reliably prevent asbestos leakage.
As described above, in recent asbestos treatment that uses a large amount of water, if the poly sheet is damaged, there is a problem that contaminated water may flow out of the work area from the damaged part and contaminate the outside of the work area. It was. The outflow of contaminated water is not a problem that can be avoided by the negative pressure dust removal device, and a solution to the problem has been demanded.

  In order to solve the above-mentioned problem, the present invention aims to provide a method of using a waterproof material that can reliably prevent damage to the floor curing material in asbestos treatment for the floor curing material in asbestos treatment. It is.

  As a result of various studies to achieve the above object, the inventor of the present application has confirmed that the waterproofing material of the synthetic polymer roofing sheet JIS A 6008 or the architectural waterproofing coating material JIS A 6021 is asbestos-treated floor surface curing material. The present invention has been completed by finding that it is suitable for the above, and that the breakage of the curing material on the floor is surely prevented.

  That is, the method of using the waterproof material of the present invention as an asbestos-treated floor surface curing material is obtained by using a synthetic polymer roofing sheet JIS A 6008 or an architectural waterproofing material JIS A 6021 as an asbestos-treated work area. The floor surface is cured without being bonded to the floor surface.

The method of using the waterproof material of the present invention as an asbestos-treated floor surface curing material is to cure the floor surface by laying a waterproof material defined in Japanese Industrial Standard on the asbestos-treated floor surface. According to the present invention, even if the removal treatment work is performed in the asbestos treatment, the curing material is not damaged. Thereby, the interruption of the operation | work by the damage of a floor surface curing material can also be avoided, and work efficiency can also be improved. Moreover, it is suitable for asbestos treatment using a large amount of water in recent years, and it becomes possible to prevent the outflow of contaminated water from the damaged portion of the conventional curing material.
The method of using the waterproof material of the present invention as an asbestos-treated floor surface curing material can be easily cut and folded into a disposal bag and can be disposed of.

  The present invention realizes the isolation and sealing curing of the floor surface of the work area in asbestos treatment.

The method of using the waterproof material of the present invention as an asbestos-treated floor surface curing material uses a waterproof material defined in Japanese Industrial Standard (JIS) as the floor surface curing material. As the waterproof material defined in Japanese Industrial Standard, synthetic polymer roofing sheet JIS A 6008 and architectural coating waterproof material JIS A 6021 are preferable. A more preferable material is a synthetic polymer roofing sheet JIS A 6008.
In addition, the construction method of the joint part of the said waterproof material shall be performed by the construction method prescribed | regulated to Japanese Industrial Standard.

  The waterproof material of the synthetic polymer roofing sheet JIS A 6008 and the architectural waterproofing coating material JIS A 6021 according to the present invention is a waterproof material to be constructed on the roof of a building. The material has characteristics such as forming a uniform waterproof layer, having excellent durability, following the behavior of the foundation, and having fewer construction steps. According to the present invention, even if the asbestos treatment is performed for a long time, the curing material on the floor surface is not damaged. This effect is considered to be obtained by the characteristics of the waterproof material. The waterproof material has a feature that follows the behavior of the base, which is due to the high elongation rate of the material. As described above, the waterproof material of the synthetic polymer roofing sheet JIS A 6008 and the architectural waterproofing coating material JIS A 6021 according to the present invention has a property that can flexibly cope with cracks and movement of the base, It is considered that no damage will occur even if an operator steps on sand and concrete debris on the surface of the floor curing material or drops a hard and protruding object such as a tool. In addition, the waterproof material having this effect is flexible in behavior on the temporary scaffolding provided in the head and legs of the chimney and the distortion of the scaffolding in the asbestos treatment by the apparatus disclosed in the above-mentioned JP-A-2008-149264. It can cope with.

In this example, synthetic polymer roofing sheet JIS A 6008 was used as a curing material for the floor surface of the asbestos removal work area. A description will be given based on work procedures 1 to 5 relating to the sheet in asbestos processing. In addition, the asbestos process of a present Example is an asbestos process of a chimney. The work area is provided on the leg and head of the chimney, and the head is provided with a temporary scaffold for lifting an asbestos removal device that jets ultra-high pressure water. The processing period was 7 days.
(Working procedure 1) Curing of the floor On the floor of the work area of the chimney leg and the floor of the temporary scaffolding of the head, a homogeneous sheet (vulcanized rubber) of Japanese Industrial Standard JIS A 6008 (synthetic polymer roofing sheet) System) Lay a material with a thickness of 1.00mm or more as a floor curing material. The stacking width of the floor surface curing material is 10cm in both length and width, similar to the stacking width of the synthetic polymer roofing sheet in “Chapter 3 Waterproof repair work” in the public building repair work standard specification (2007 version). As described above, construction is performed. In this construction, the curing material is laid (not bonded) on the floor surface, and the joint portion is bonded with a waterproof double-sided adhesive tape to cure the floor in the work area.
(Working procedure 2) Curing of wall surface The ceiling surface, wall surface, equipment, etc. in the work area shall be one sheet of poly sheet of 0.08mm or more.
The work area of the chimney leg and the head is isolated and sealed by the above-mentioned curing work on the floor and wall surfaces.
(Working procedure 3) Asbestos-contaminated water treatment Contaminated wastewater and asbestos sludge generated by asbestos treatment are sucked up by a suction device and stored in a storage tank installed on the floor curing material in the work area.
(Procedure 4) Prevention of dust scattering on the curing material, etc. Airless sprayer (airless spraying) on the curing surface (ceiling surface, wall surface) of the policy and the curing surface (floor surface) of the curing material (floor surface). Spray).
(Work procedure 5) Removal of curing materials, etc. Curing is removed in the order of the ceiling surface, wall surface, and floor surface, and the isolated curing area is released. The poly sheet and the floor curing material used for curing are folded so that the contaminated surface is inside, and double sealed with a plastic bag for asbestos disposal and a transparent plastic bag (packed in a waste bag).
After removal of the curing material, the presence or absence of contaminated water was confirmed. Contaminated water generated during the asbestos treatment operation was not confirmed to flow outside the isolation area.

(Contrast with other materials)
The inventor of the present application is an asbestos processing company (asbestos work chief) for chimneys and buildings. The inventor selects a material considered as a curing material for the floor of the work area, and (a) construction, (b) breakage, (c) weight, (d) disposal, (e) comprehensive evaluation (curing) of the material (Compatibility as a material) and examined which material is most suitable as a floor curing material for asbestos treatment.
Hereinafter, the materials capable of curing the floor will be described by comparing the items (a) to (d) with Comparative Examples 1 to 5, Examples of the present invention, and polysheets.
Table 1 shows the comparison with Comparative Examples 1-5, the Example of this invention, and a poly sheet.
In addition, the poly sheet contrasted with the waterproof material of this invention is a sheet | seat of thickness 0.3 which laminated | stacked two sheets of thickness 0.15mm. The 0.3-thick poly sheet is difficult to form in production and is not supplied to the market as a general-purpose material. Therefore, the above-mentioned two-sheet 0.3-thick sheet was used.

（評価）
５：最良、４：優、３：良、２：可、１：不良

(Evaluation)
5: Best, 4: Excellent, 3: Good, 2: Acceptable, 1: Poor

Comparative Example 1: Concrete (excluding lightweight concrete), thickness 50mm
(A) Workability: It takes about three weeks to harden the concrete, and the curing work takes too long. In addition, formwork is required for the rise of the wall surface, and equipment such as a pressure pump is required.
(B) Damage: Reinforcing bars such as reinforcing bars are required to prevent cracking in construction on behavioral objects such as temporary scaffolds.
(C) Weight: very heavy.
(D) Disposal: Removal and dismantling is a heavy work, and a large amount of waste is generated.
(E) Evaluation: The curing work period, weight, and disposal are comprehensively judged and are not suitable as a curing material.

Comparative Example 2: Steel plate, thickness 3 mm
(A) Workability: Welding work is required in field construction.
(B) Damage: The possibility of damage is low.
(C) Weight: Heavy.
(D) Disposal: Fire work is required for removal by fusing.
(E) Evaluation: Since fire is used for welding and fusing, it is not preferable and suitable as a curing material for buildings.

Comparative Example 3: Resin plate, thickness 3 mm
(A) Workability: Welding work is required in on-site construction.
(B) Breakage: There was almost no elongation, and cracks occurred where the floor base was uneven.
(C) Weight: Heavy.
(D) Disposal: Cutting of saws, etc. is necessary. It is difficult to seal the waste bag (packing), and heavy waste is generated.
(E) Evaluation: Since there is a possibility of cracking and damage to the curing material cannot be prevented, it is not suitable as a curing material.

Comparative Example 4: Steel wire-containing glass plate, thickness 10 mm
(A) Workability: Sealing work is required for joints and the like. Sufficient attention is required for cracks during construction.
(B) Breakage: Hard and dense, but cracked by impact. Also, other materials such as thick plates and protective materials are required to prevent cracking.
(C) Weight: Heavy.
(D) Disposal: The weight at the time of disposal becomes large, and the bag is torn during disposal bagging.
(E) Evaluation: Cracking occurs during laying work and is not suitable as a curing material.

Comparative Example 5: Tent sheet, thickness 1 mm
(A) Workability: Almost good. However, factory bonding is required to bond the joints.
(B) Breakage: There is little elongation and there is a risk of breakage.
(C) Weight: light.
(D) Disposal: Cutting with a cutter knife is possible, and disposal bagging is possible.
(E) Evaluation: There is a risk of breakage, and it is not suitable as a curing material.

Example: Waterproof material defined in Japanese Industrial Standard, thickness 1.0 mm
(A) Workability: good.
(B) Breakage: In the examples of the synthetic polymer roofing sheet JIS A 6008, no breakage was found in the asbestos treatment. Moreover, the said sheet | seat which cured the temporary scaffold of the chimney head respond | corresponded flexibly to the deformation | transformation of the temporary scaffold by a wind besides the behavior of the worker on a temporary scaffold for the working period of 7 days, and was not damaged.
(C) Weight: light.
(D) Disposal: Cutting with a cutter knife is possible, and disposal bagging is easy.
(E) Evaluation: It is a material that does not cause damage to the curing material, and is optimal as a curing material.

Policy, thickness 0.3mm
(A) Workability: good. However, because it is double-laid, it takes two steps.
(B) Damage: Due to the behavior of the workers in the work area, concrete debris was pressed against the poly sheet, and the two sheets laid on top of each other were damaged, and contaminated water was flowing out from the damaged part to the floor surface. .
(C) Weight: light.
(D) Disposal: Cutting with a cutter knife is possible, and disposal bagging is easy.
(E) Evaluation: It is a material that has been conventionally recognized as a curing material, and is considered suitable as a curing material for wall surfaces. However, as a curing material for the floor surface, it is easily damaged due to behavior during asbestos treatment and is not suitable for asbestos treatment using a large amount of water. In addition, in order to prevent the breakage, when it is laid over and overlaid (for example, with a polysheet having a thickness of about 1.0 mm), the workability is lacking.

The evaluation of the curing examples of the comparative examples 1 to 5, the examples and the polysheet will be described based on Table 1.
The materials of Comparative Examples 1 to 5 have the disadvantage that it takes time for construction (curing), and it can be determined that they are unsuitable as compared to the material of the example (waterproofing material). In addition, the poly sheet also has a drawback in that it takes time for curing because it is necessary to lay a plurality of sheets in order to reliably prevent damage. On the other hand, the materials of the examples are superior to Comparative Examples 1 to 5 and the polysheet in that the curing work is easy and the material does not break.
From the above, it can be judged that the synthetic polymer roofing sheet JIS A 6008 is optimal as a curing material that reliably prevents breakage in asbestos treatment.

Among the waterproof materials according to the present invention, the synthetic polymer roofing sheet JIS A 6008 is extremely easy to construct. In addition, JIS A 6021, a waterproof coating material for buildings, has the disadvantage that it takes longer to construct than the synthetic polymer roofing sheet JIS A 6008, but because there are no joints, damage to the curing material and outflow of contaminated water It is superior in that it can be prevented more reliably.
Further, among the materials of the synthetic polymer roofing sheet JIS A 6008, a homogeneous sheet rubber-based (vulcanized rubber, non-vulcanized rubber) sheet is preferable. This is because the rubber sheet has good elongation, is easy to construct, and has excellent followability to the movement of the floor surface (for example, the behavior of the worker and distortion of the temporary scaffold).

As described above, the poly sheet, which is a conventional curing material, is damaged by the behavior of workers when used on the floor, and is not suitable as a floor curing material for asbestos treatment using a large amount of water in recent years. Is. On the other hand, the present invention using the waterproof material of the synthetic polymer roofing sheet JIS A 6008 and the architectural waterproofing coating material JIS A 6021 is easy to be cured and is damaged depending on the behavior of the worker. It is a floor curing method that does not. Therefore, the present invention is optimal as an asbestos-treated floor surface curing method.

Claims (1)

A waterproofing material characterized by laying the floor surface without bonding the synthetic polymer roofing sheet JIS A 6008 or architectural waterproofing coating material JIS A 6021 to the floor surface of the asbestos work area. Method used for asbestos-treated floor surface curing materials.