JP2020163330A - Decontamination method - Google Patents
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Abstract
Description
本発明は、壁面から当該壁面に付着した汚染物質を含む油（本願において「汚染物質含有油」と呼ぶ場合がある。）を除去する除染方法に関する。 The present invention relates to a decontamination method for removing oil containing a pollutant adhering to the wall surface (sometimes referred to as "pollutant-containing oil" in the present application) from the wall surface.
壁面から汚染物質含有油を除去する除染方法として、エポキシ樹脂系塗料、アクリル樹脂系塗料、ポリウレタン系塗料等の一般的な樹脂塗料をＰＣＢ（ポリ塩化ビフェニル）やダイオキシン類等の汚染物質を含む油が付着している壁面に塗布し、当該塗布された発泡剤含有樹脂塗料の塗膜を硬化させ、当該硬化した塗膜を壁面から剥離する方法が提案されている（例えば、特許文献１を参照。）。また、このような従来の除染方法では、硬化後の塗膜をチッパー等などの工事用具を用いて壁面を構成するコンクリートの一部とともに削り取る形態で、当該塗膜を壁面から剥離している。 As a decontamination method for removing pollutant-containing oil from the wall surface, general resin paints such as epoxy resin paints, acrylic resin paints, and polyurethane paints contain pollutants such as PCBs (polychlorinated biphenyls) and dioxin. A method has been proposed in which a method is proposed in which an oil is applied to a wall surface, the coating film of the applied foaming agent-containing resin paint is cured, and the cured coating film is peeled off from the wall surface (for example, Patent Document 1). reference.). Further, in such a conventional decontamination method, the coating film after curing is peeled off from the wall surface in a form of scraping off the cured coating film together with a part of concrete constituting the wall surface using a construction tool such as a chipper. ..
一般的な樹脂塗料を用いた従来の除染方法では、壁面に塗布された樹脂塗料の塗膜内部に取り込まれた汚染物質が、当該塗膜内部で拡散して、硬化後の塗膜表面に露出する虞がある。そして、このように塗膜表面に汚染物質が露出すると、その塗膜を壁面から剥離する剥離工程やその剥離後の塗膜を搬送及び処理する工程において、汚染範囲を拡大させる二次汚染の発生要因となる。
また、このような塗膜表面への汚染物質の露出を抑制するために、充分な膜厚で壁面の樹脂塗料を塗布することが考えられるが、そのためには樹脂塗料を多く重ね塗りする必要があり、作業効率が非常に悪いという問題がある。
In the conventional decontamination method using a general resin paint, contaminants taken into the coating film of the resin paint applied to the wall surface diffuse inside the coating film and reach the surface of the coating film after curing. There is a risk of being exposed. When a contaminant is exposed on the surface of the coating film in this way, secondary contamination that expands the contamination range occurs in the peeling step of peeling the coating film from the wall surface and the step of transporting and treating the coating film after the peeling. It becomes a factor.
Further, in order to suppress the exposure of contaminants to the surface of the coating film, it is conceivable to apply the resin paint on the wall surface with a sufficient film thickness, but for that purpose, it is necessary to apply a large amount of the resin paint. There is a problem that work efficiency is very poor.
この実情に鑑み、本発明の主たる課題は、壁面に塗布された樹脂塗料の塗膜を硬化後に壁面から剥離することで、壁面から汚染物質を含む油を除去する除染方法において、優れた作業効率を実現しながら、その塗膜を壁面から剥離する剥離工程やその剥離後の塗膜を搬送及び処理する工程において塗膜の内部に取り込んだ有機ハロゲン化物による二次汚染の発生を抑制することができる技術を提供する点にある。 In view of this situation, a main subject of the present invention is an excellent work in a decontamination method for removing oil containing a pollutant from a wall surface by peeling the coating film of a resin paint applied to the wall surface from the wall surface after curing. While achieving efficiency, suppressing the occurrence of secondary contamination due to organic halides taken into the coating film in the peeling step of peeling the coating film from the wall surface and the step of transporting and processing the coating film after the peeling. The point is to provide technology that can be used.
本発明の第１特徴構成は、壁面から当該壁面に付着した汚染物質を含む油を除去する除染方法であって、
樹脂塗料に発泡剤を混合して発泡剤含有樹脂塗料を得る発泡剤混合工程と、
前記発泡剤混合工程で得た発泡剤含有樹脂塗料を前記壁面に塗布する塗布工程と、
前記塗布工程で塗布された発泡剤含有樹脂塗料の塗膜を硬化させる硬化工程と、
前記硬化工程で硬化した塗膜を前記壁面から剥離する剥離工程と、を実行する点にある。
The first characteristic configuration of the present invention is a decontamination method for removing oil containing contaminants adhering to the wall surface from the wall surface.
A foaming agent mixing step of mixing a foaming agent with a resin paint to obtain a foaming agent-containing resin paint,
A coating step of applying the foaming agent-containing resin paint obtained in the foaming agent mixing step to the wall surface, and
A curing step of curing the coating film of the foaming agent-containing resin paint applied in the coating step, and
The point is to carry out a peeling step of peeling the coating film cured in the curing step from the wall surface.
本構成によれば、壁面に塗布された発泡剤含有樹脂塗料の塗膜は、例えば多くの重ね塗りを必要とせずに、予め混合された発泡剤の発泡作用により、塗膜の表面と壁面との距離である膜厚を増加させながら硬化する。よって、壁面から塗膜内部に取り込まれて拡散する汚染物質が硬化後の塗膜表面に到達して露出することを抑制できる。
従って、本発明により、壁面に塗布された樹脂塗料の塗膜を硬化後に壁面から剥離することで、壁面から汚染物質含有油を除去するにあたり、優れた作業効率を実現しながら、その塗膜を壁面から剥離する剥離工程やその剥離後の塗膜を搬送及び処理する工程において塗膜の内部に取り込んだ汚染物質による二次汚染の発生を抑制することができる除染方法を提供することができる。
According to this configuration, the coating film of the foaming agent-containing resin paint applied to the wall surface can be formed on the surface and the wall surface of the coating film by the foaming action of the premixed foaming agent, for example, without requiring many recoatings. It cures while increasing the film thickness, which is the distance between. Therefore, it is possible to prevent contaminants that are taken into the coating film from the wall surface and diffused from reaching the surface of the coating film after curing and being exposed.
Therefore, according to the present invention, by peeling off the coating film of the resin paint applied to the wall surface from the wall surface after curing, the coating film can be removed while achieving excellent work efficiency in removing pollutant-containing oil from the wall surface. It is possible to provide a decontamination method capable of suppressing the occurrence of secondary contamination due to contaminants taken into the coating film in the peeling step of peeling from the wall surface and the step of transporting and processing the coating film after the peeling. ..
本発明の第２特徴構成は、前記樹脂塗料が、ポリウレタン樹脂塗料である点にある。 The second characteristic configuration of the present invention is that the resin coating material is a polyurethane resin coating material.
本構成によれば、硬化後の塗膜に良好な機械強度及び柔軟性を与えることができるポリウレタン樹脂塗料を利用し、当該ポリウレタン樹脂塗料に発泡剤を混合したものを発泡剤含有樹脂塗料として壁面に塗布する。すると、壁面から硬化後の塗膜を剥離する際に、当該硬化後の塗膜をできるだけ破損させずにシート状（フィルム状）を保ったまま壁面から剥がすことができる。このことで、当該塗膜の破損による塗膜内部に取り込んだ汚染物質の外部への拡散を抑制することができる。 According to this configuration, a polyurethane resin paint that can give good mechanical strength and flexibility to the cured coating film is used, and a mixture of the polyurethane resin paint and a foaming agent is used as a foaming agent-containing resin paint on the wall surface. Apply to. Then, when the cured coating film is peeled off from the wall surface, the cured coating film can be peeled off from the wall surface while maintaining the sheet shape (film shape) without damaging the cured coating film as much as possible. As a result, it is possible to suppress the diffusion of contaminants taken into the inside of the coating film due to the breakage of the coating film to the outside.
本発明の第３特徴構成は、前記発泡剤含有樹脂塗料は、前記汚染物質に対して親和性を有する汚染物質親和剤を含有する点にある。 The third characteristic configuration of the present invention is that the foaming agent-containing resin coating material contains a pollutant-affinitive agent having an affinity for the pollutant.
本構成によれば、発泡剤含有樹脂塗料の主成分である樹脂塗料に、例えば汚染物質と近似する溶解パラメータ（ＳＰ値）を有することで当該汚染物質に対して親和性を有する汚染物質親和剤が含有されているので、壁面に付着している汚染物質を、当該壁面に塗布された発泡剤含有樹脂塗料の塗膜内部へ溶解させる形態で、良好に塗膜内部へ取り込むことができる。 According to this configuration, a pollutant affinity agent having an affinity for the pollutant by having a dissolution parameter (SP value) similar to that of the pollutant, for example, in the resin paint which is the main component of the foaming agent-containing resin paint. Is contained, the pollutants adhering to the wall surface can be satisfactorily taken into the coating film in the form of dissolving the pollutants adhering to the wall surface into the coating film of the foaming agent-containing resin paint applied to the wall surface.
本発明の第４特徴構成は、前記発泡剤含有樹脂塗料は、疎水性を有する微粒子を含有する点にある。 The fourth characteristic configuration of the present invention is that the foaming agent-containing resin paint contains fine particles having hydrophobicity.
本構成によれば、発泡剤含有樹脂塗料の主成分である樹脂塗料に疎水性（親油性）の微粒子が含有されているので、壁面に付着している汚染物質含有油を、当該壁面に塗布された発泡剤含有樹脂塗料の塗膜内部に存在する微粒子に吸着させる形態で、良好に塗膜内部へ取り込むことができる。このことで、壁面からの汚染物質の除去率を向上することができる。 According to this configuration, the resin paint, which is the main component of the foaming agent-containing resin paint, contains hydrophobic (lipophilic) fine particles, so that the pollutant-containing oil adhering to the wall surface is applied to the wall surface. In the form of being adsorbed on the fine particles existing inside the coating film of the foaming agent-containing resin paint, it can be satisfactorily taken into the coating film. This makes it possible to improve the removal rate of pollutants from the wall surface.
本発明の実施形態について図１〜図４に基づいて説明する。
本実施形態の除染方法は、ＰＣＢ（汚染物質の一例）を含有するＰＣＢ含有油Ｍが付着した壁面Ｗ（図１参照）から当該ＰＣＢ含有油Ｍを除去する除染方法として構成されている。
そして、本実施形態の除染方法によれば、優れた作業効率を実現しながら、その塗膜Ｐｆを壁面Ｗから剥離する剥離工程やその剥離後の塗膜Ｐｆを搬送及び処理する工程において塗膜Ｐｆの内部に取り込んだＰＣＢ等の汚染物質による二次汚染の発生を抑制する目的で、後述するような発泡剤混合工程、塗布工程、硬化工程、及び剥離工程を順に実行するものとして構成されている。
An embodiment of the present invention will be described with reference to FIGS. 1 to 4.
The decontamination method of the present embodiment is configured as a decontamination method for removing the PCB-containing oil M from the wall surface W (see FIG. 1) to which the PCB-containing oil M containing PCB (an example of a pollutant) is attached. ..
Then, according to the decontamination method of the present embodiment, the coating film Pf is applied in the peeling step of peeling the coating film Pf from the wall surface W and the step of transporting and processing the coating film Pf after the peeling while realizing excellent work efficiency. For the purpose of suppressing the occurrence of secondary contamination due to contaminants such as PCBs taken into the membrane Pf, the foaming agent mixing step, coating step, curing step, and peeling step described later are sequentially executed. ing.
〔発泡剤混合工程〕
発泡剤混合工程では、樹脂塗料に発泡剤を混合して発泡剤含有樹脂塗料Ｐを得る。
ここで、発泡剤含有樹脂塗料Ｐの主成分となる樹脂塗料としては、硬化後の塗膜Ｐｆ（図３参照）に良好な機械強度及び柔軟性を与える目的で、主剤として複数の水酸基を持つ樹脂としてのポリオールと硬化剤としてのポリイソシアネートを組み合わせた無溶剤のポリウレタン樹脂塗料が好適に利用されている。尚、本実施形態では、柔軟性等を考慮してポリウレタン樹脂塗料を利用するが、効果後の塗膜Ｐｆの機械強度や柔軟性等を許容できる範囲内において、アクリル樹脂系塗料やエポキシ樹脂塗料等の別の樹脂塗料を利用しても構わない。
[Blowing agent mixing process]
In the foaming agent mixing step, a foaming agent is mixed with the resin paint to obtain a foaming agent-containing resin paint P.
Here, the resin paint that is the main component of the foaming agent-containing resin paint P has a plurality of hydroxyl groups as the main agent for the purpose of imparting good mechanical strength and flexibility to the cured coating film Pf (see FIG. 3). A solvent-free polyurethane resin coating material in which a polyol as a resin and a polyisocyanate as a curing agent are combined is preferably used. In this embodiment, the polyurethane resin paint is used in consideration of flexibility and the like, but the acrylic resin paint and the epoxy resin paint are used within the range where the mechanical strength and flexibility of the coating film Pf after the effect can be tolerated. You may use another resin paint such as.
上記発泡剤としては、特に制限はないが、大塚化学社製の無機系発泡剤（Ｐシリーズ）、三協化成社製の有機系発泡剤（セルマイクＣシリーズ）や無機系発泡剤（セルマイク２６６）等を利用することができる。
そして、発泡剤含有樹脂塗料Ｐにおける発泡剤の含有率は、後述する硬化工程での塗膜Ｐｆ（図２及び図３参照）の膜厚増加率が所望の範囲内となるように調整（例えば０．１％以上且つ１．０％以下の範囲内に調整）されている。
The foaming agent is not particularly limited, but is an inorganic foaming agent (P series) manufactured by Otsuka Chemical Co., Ltd., an organic foaming agent (Celmic C series) manufactured by Sankyo Kasei Co., Ltd., and an inorganic foaming agent (Celmic 266). Etc. can be used.
The content of the foaming agent in the foaming agent-containing resin coating material P is adjusted so that the film thickness increase rate of the coating film Pf (see FIGS. 2 and 3) in the curing step described later is within a desired range (for example). It is adjusted within the range of 0.1% or more and 1.0% or less).
上記発泡剤含有樹脂塗料Ｐには、壁面ＷからのＰＣＢの除去率を向上するためのＰＣＢ親和剤（汚染物質親和剤の一例）を含有させることができる。
かかるＰＣＢ親和剤は、ＰＣＢの溶解パラメータ（ＳＰ値＝１０．８〜１３．５程度）と近似する溶解パラメータ（例えばＳＰ値＝８．０〜１１．０）を有して当該ＰＣＢに対して親和性を有する薬剤である。このようなＰＣＢ親和剤としては、例えば、アクリル酸イソブチル、ｔ−ブチルアクリレート、イソステアリルメタクリレート、スチレン、ジビニル化合物等を利用することができる。
The foaming agent-containing resin coating material P may contain a PCB affinity agent (an example of a pollutant affinity agent) for improving the removal rate of PCB from the wall surface W.
Such a PCB affinity has a solubility parameter (for example, SP value = 8.0 to 11.0) that is close to the solubility parameter of the PCB (SP value = about 10.8 to 13.5) with respect to the PCB. It is a drug with affinity. As such a PCB affinity agent, for example, isobutyl acrylate, t-butyl acrylate, isostearyl methacrylate, styrene, divinyl compound and the like can be used.
上記発泡剤含有樹脂塗料Ｐには、壁面ＷからのＰＣＢを含むＰＣＢ含有油Ｍの除去率を向上するための疎水性（親油性）を有する微粒子を含有することができる。
かかる疎水性を有する微粒子としては、例えば、珪藻土、クレイ、タルク等のように油吸着材として一般的に使用されているようなものを利用することができ、また、表面に疎水コーティングを塗着した微粒子（例えば特表２０１５−５３３８９８に記載の超親油粒子）等も利用することができる。
The foaming agent-containing resin coating material P can contain fine particles having hydrophobicity (lipophilicity) for improving the removal rate of the PCB-containing oil M containing PCB from the wall surface W.
As the fine particles having such hydrophobicity, for example, those generally used as an oil adsorbent such as diatomaceous earth, clay, talc, etc. can be used, and a hydrophobic coating is applied to the surface. Fine particles (for example, superhydrophobic particles described in Special Table 2015-533898) and the like can also be used.
更に、硬化後の塗膜Ｐｆ（図３参照）の機械強度を向上させるために、公知の変性ポリオール（例えば、特開平０８−１７６５０３を参照。）、特殊ポリマー、変性ジイソシアネート（例えば、特開平０６−１９９９７６を参照。）、変性イソシアネート（例えば、特開２０１１−２５２２９２を参照。）等を、上記ポリウレタン樹脂塗料の成分として利用することができる。 Further, in order to improve the mechanical strength of the cured coating film Pf (see FIG. 3), known modified polyols (see, for example, JP-A-08-176503), special polymers, and modified diisocyanates (eg, JP-A-06). -199976), modified isocyanate (see, for example, Japanese Patent Application Laid-Open No. 2011-252292) and the like can be used as components of the polyurethane resin coating film.
〔塗布工程〕
上記発泡剤混合工程の次に実行される塗布工程では、上記発泡剤混合工程で得た発泡剤含有樹脂塗料Ｐを、ＰＣＢ含有油Ｍが付着した壁面Ｗ（図１参照。）に塗布する。
すると、図２に示すように、壁面Ｗに形成された発泡剤含有樹脂塗料Ｐの塗膜Ｐｆの内部に、当該壁面Ｗに付着していたＰＣＢ含有油Ｍが取り込まれて拡散する。
尚、この塗布工程における壁面Ｗへの発泡剤含有樹脂塗料Ｐの塗布は、ＰＣＢの二次汚染の発生を回避するために、壁面Ｗに直接接触する刷毛やローラを用いるのではなく、スプレーガンあるいはディスペンサー等の壁面Ｗに直接接触しない塗装器具を用いて行うことが望ましい。
[Applying process]
In the coating step executed after the foaming agent mixing step, the foaming agent-containing resin paint P obtained in the foaming agent mixing step is applied to the wall surface W (see FIG. 1) to which the PCB-containing oil M is attached.
Then, as shown in FIG. 2, the PCB-containing oil M adhering to the wall surface W is taken in and diffused inside the coating film Pf of the foaming agent-containing resin paint P formed on the wall surface W.
In the coating of the foaming agent-containing resin paint P on the wall surface W in this coating step, in order to avoid the occurrence of secondary contamination of the PCB, a spray gun is used instead of using a brush or a roller that directly contacts the wall surface W. Alternatively, it is desirable to use a coating tool such as a dispenser that does not come into direct contact with the wall surface W.
発泡剤含有樹脂塗料Ｐに上述したＰＣＢ親和剤が含有されている場合には、壁面Ｗに付着しているＰＣＢ含有油Ｍに含まれるＰＣＢは、当該壁面Ｗに塗布された発泡剤含有樹脂塗料Ｐの塗膜Ｐｆの内部へ溶解する形態で、良好に塗膜Ｐｆ内部へ取り込まれることになる。
発泡剤含有樹脂塗料Ｐに上述した疎水性の微粒子が含有されている場合には、壁面Ｗに付着しているＰＣＢ含有油Ｍは、当該壁面Ｗに塗布された発泡剤含有樹脂塗料Ｐの塗膜Ｐｆの内部に存在する微粒子に吸着する形態で、良好に塗膜Ｐｆの内部へ取り込まれることになる。
When the above-mentioned PCB affinity agent is contained in the foaming agent-containing resin paint P, the PCB contained in the PCB-containing oil M adhering to the wall surface W is the foaming agent-containing resin paint applied to the wall surface W. In the form of being dissolved inside the coating film Pf of P, it is satisfactorily incorporated into the coating film Pf.
When the above-mentioned hydrophobic fine particles are contained in the foaming agent-containing resin coating material P, the PCB-containing oil M adhering to the wall surface W is coated with the foaming agent-containing resin coating material P applied to the wall surface W. In the form of being adsorbed on the fine particles existing inside the film Pf, it is satisfactorily taken into the inside of the coating film Pf.
〔硬化工程〕
上記塗布工程の次に実行される硬化工程では、所定の硬化時間待機する形態で、上記塗布工程で塗布された発泡剤含有樹脂塗料Ｐの塗膜Ｐｆを硬化させる。例えば、本実施形態における発泡剤含有樹脂塗料Ｐの硬化時間は３〜５分に設定されている。
このとき、図３に示すように、壁面Ｗに塗布された発泡剤含有樹脂塗料Ｐの塗膜Ｐｆは、当該発泡剤含有樹脂塗料Ｐに予め混合された発泡剤の発泡作用により、塗膜Ｐｆの表面と壁面Ｗとの距離である膜厚を増加させながら硬化する。
すると、壁面Ｗから塗膜Ｐｆの内部に取り込まれて拡散するＰＣＢ含有油Ｍ及びそれに含まれるＰＣＢは、塗膜Ｐｆの表面に到達し難くなる。よって、塗膜Ｐｆの表面へのＰＣＢの露出が抑制される。
[Curing process]
In the curing step executed after the coating step, the coating film Pf of the foaming agent-containing resin paint P applied in the coating step is cured in a form of waiting for a predetermined curing time. For example, the curing time of the foaming agent-containing resin coating material P in this embodiment is set to 3 to 5 minutes.
At this time, as shown in FIG. 3, the coating film Pf of the foaming agent-containing resin coating material P applied to the wall surface W is formed by the foaming action of the foaming agent previously mixed with the foaming agent-containing resin coating material P. It cures while increasing the film thickness, which is the distance between the surface and the wall surface W.
Then, the PCB-containing oil M that is taken into the inside of the coating film Pf from the wall surface W and diffuses, and the PCB contained therein become difficult to reach the surface of the coating film Pf. Therefore, the exposure of PCB to the surface of the coating film Pf is suppressed.
ここで、上述のように発泡剤含有樹脂塗料Ｐにおける発泡剤の含有率を調整することにより、硬化工程における塗膜Ｐｆの膜厚増加率は、例えば１７０％以上且つ２３０％以下の所望の範囲内に設定することが望ましい。即ち、硬化工程における塗膜Ｐｆの膜厚増加率が１７０％未満である場合には、塗膜Ｐｆの内部に取り込まれたＰＣＢ等の汚染物質が塗膜Ｐｆの表面に露出して、塗膜Ｐｆの外部への二次汚染の発生が懸念される。一方、硬化工程における塗膜Ｐｆの膜厚増加率が２３０％超である場合には、硬化後の塗膜Ｐｆの機械強度や柔軟性が低下して、後の剥離工程において、塗膜Ｐｆの破損による外部へのＰＣＢ等の汚染物質の拡散が懸念される。 Here, by adjusting the content of the foaming agent in the foaming agent-containing resin paint P as described above, the film thickness increase rate of the coating film Pf in the curing step is, for example, in the desired range of 170% or more and 230% or less. It is desirable to set within. That is, when the film thickness increase rate of the coating film Pf in the curing step is less than 170%, contaminants such as PCB taken into the coating film Pf are exposed on the surface of the coating film Pf, and the coating film is coated. There is concern about the occurrence of secondary contamination of Pf to the outside. On the other hand, when the film thickness increase rate of the coating film Pf in the curing step is more than 230%, the mechanical strength and flexibility of the coating film Pf after curing are lowered, and the coating film Pf is subjected to the subsequent peeling step. There is concern about the diffusion of pollutants such as PCBs to the outside due to damage.
また、後の剥離工程での塗膜Ｐｆの破損を好適に防止するために、硬化後の塗膜Ｐｆは、膜厚が１ｍｍ程度で、且つ、１Ｎ／ｍｍ２以上の機械強度を有するものであることが望ましい。 Further, in order to preferably prevent the coating film Pf from being damaged in the subsequent peeling step, the cured coating film Pf has a film thickness of about 1 mm and a mechanical strength of 1 N / mm 2 or more. It is desirable to have.
〔剥離工程〕
上記硬化工程の次に実行される剥離工程では、上記硬化工程で硬化した塗膜Ｐｆを壁面Ｗから剥離する。
この剥離工程では、図４に示すように、硬化後の塗膜Ｐｆが柔軟で且つ優れた機械強度を有するものとなることから、当該硬化後の塗膜Ｐｆをできるだけ破損させずにシート状（フィルム状）を保ったまま壁面Ｗから剥がすことができる。このことで、当該塗膜Ｐｆの破損による塗膜Ｐｆの内部に取り込んだＰＣＢ等の汚染物質の外部への拡散を抑制することができる。
[Peeling process]
In the peeling step executed after the curing step, the coating film Pf cured in the curing step is peeled from the wall surface W.
In this peeling step, as shown in FIG. 4, the cured coating film Pf becomes flexible and has excellent mechanical strength. Therefore, the cured coating film Pf is formed into a sheet without being damaged as much as possible. It can be peeled off from the wall surface W while maintaining the film shape. As a result, it is possible to suppress the diffusion of pollutants such as PCBs taken into the inside of the coating film Pf due to the damage of the coating film Pf to the outside.
Ｍ ＰＣＢ含有油（汚染物質を含む油）
Ｐ 発泡剤含有樹脂塗料
Ｐｆ 塗膜
Ｗ 壁面
M PCB-containing oil (oil containing pollutants)
P Foaming agent-containing resin paint Pf coating film W wall surface
Claims (4)
樹脂塗料に発泡剤を混合して発泡剤含有樹脂塗料を得る発泡剤混合工程と、
前記発泡剤混合工程で得た発泡剤含有樹脂塗料を前記壁面に塗布する塗布工程と、
前記塗布工程で塗布された発泡剤含有樹脂塗料の塗膜を硬化させる硬化工程と、
前記硬化工程で硬化した塗膜を前記壁面から剥離する剥離工程と、を実行する除染方法。 A decontamination method for removing oil containing pollutants adhering to the wall surface from the wall surface.
A foaming agent mixing step of mixing a foaming agent with a resin paint to obtain a foaming agent-containing resin paint,
A coating step of applying the foaming agent-containing resin paint obtained in the foaming agent mixing step to the wall surface, and
A curing step of curing the coating film of the foaming agent-containing resin paint applied in the coating step, and
A decontamination method for performing a peeling step of peeling a coating film cured in the curing step from the wall surface.
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