JPH01318660A - Method of disposing asbestos layer - Google Patents
Method of disposing asbestos layerInfo
- Publication number
- JPH01318660A JPH01318660A JP63152969A JP15296988A JPH01318660A JP H01318660 A JPH01318660 A JP H01318660A JP 63152969 A JP63152969 A JP 63152969A JP 15296988 A JP15296988 A JP 15296988A JP H01318660 A JPH01318660 A JP H01318660A
- Authority
- JP
- Japan
- Prior art keywords
- asbestos
- layer
- asbestos layer
- fibers
- adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010425 asbestos Substances 0.000 title claims abstract description 164
- 229910052895 riebeckite Inorganic materials 0.000 title claims abstract description 164
- 238000000034 method Methods 0.000 title claims description 38
- 239000000835 fiber Substances 0.000 claims abstract description 51
- 239000000853 adhesive Substances 0.000 claims abstract description 45
- 230000001070 adhesive effect Effects 0.000 claims abstract description 45
- 238000005507 spraying Methods 0.000 claims abstract description 14
- 239000007921 spray Substances 0.000 claims abstract description 12
- 239000006185 dispersion Substances 0.000 claims abstract 3
- 239000010410 layer Substances 0.000 claims description 117
- 239000011230 binding agent Substances 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 12
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 239000010419 fine particle Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 5
- 239000011247 coating layer Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 229920000642 polymer Polymers 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 239000000839 emulsion Substances 0.000 abstract description 9
- 239000007767 bonding agent Substances 0.000 abstract description 6
- 239000003822 epoxy resin Substances 0.000 abstract description 5
- 229920000647 polyepoxide Polymers 0.000 abstract description 5
- 230000001681 protective effect Effects 0.000 abstract description 5
- 229920001971 elastomer Polymers 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 10
- 206010040844 Skin exfoliation Diseases 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 7
- 239000003973 paint Substances 0.000 description 6
- 238000004079 fireproofing Methods 0.000 description 5
- 235000019353 potassium silicate Nutrition 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 239000003063 flame retardant Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000004815 dispersion polymer Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 101100480484 Rattus norvegicus Taar8a gene Proteins 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- -1 coatings Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004834 spray adhesive Substances 0.000 description 1
- 238000007592 spray painting technique Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/0066—Disposal of asbestos
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は校舎、ビル等の天井や壁に耐火用及び防音用と
して吹き付けられているアスベスト層の除去或いはアス
ベスト繊維の飛散を防止する押え込み等の処理工法に関
するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to the removal of asbestos layers sprayed on the ceilings and walls of school buildings, buildings, etc. for fireproofing and soundproofing purposes, and the pressing of asbestos fibers to prevent them from scattering. This is related to the treatment method.
（従来の技術）
アスベスト（石綿）は防音、耐熱効果を有する繊維状の
鉱物で、建材や自動車部品等に広く使用されてきたが、
空気中を漂うアスベスト繊維を吸い続けると肺がんにな
る恐れがあることが解ったためその使用が中止された。(Conventional technology) Asbestos is a fibrous mineral that has sound-insulating and heat-resistant effects, and has been widely used in building materials and automobile parts.
Its use was discontinued after it was discovered that breathing in asbestos fibers floating in the air could cause lung cancer.
しかしアスベストを吹き付けた建材（吹き付け材）を壁
や天井に使用している個所は、吹き付けたアスベスト層
からアスベスト繊維が離脱し室内汚染を引き起こす虞れ
が強く、何等かの処置が必要となった。However, in areas where building materials sprayed with asbestos (sprayed materials) are used for walls and ceilings, there is a strong risk that asbestos fibers will separate from the sprayed asbestos layer and cause indoor contamination, so some kind of countermeasures are required. .
そこで現在のアスベスト汚染対策処理方法としてはアス
ベスト層の表面に特殊な塗料を塗布し、アスベスト繊維
の飛散を防止する押丸込み法、アスベスト層の表面をシ
ート、板等で覆う囲い込み法、アスベス）・そのものを
除去してしまう除去法等が知られている。Therefore, the current methods of dealing with asbestos contamination include applying a special paint to the surface of the asbestos layer to prevent the scattering of asbestos fibers, the enclosing method, and the enclosing method of covering the surface of the asbestos layer with sheets, boards, etc. (asbestos).・Removal methods that remove the substance itself are known.
しかし、前記の対策手段の内囲い込み法は飛散したアス
ベス１−が空気中を漂うものであるため、完全な汚染防
止手段とは云い難い。However, since the above-mentioned method of enclosing asbestos in the interior causes scattered asbeth 1- to float in the air, it cannot be said to be a complete means for preventing contamination.
前記手法の内特に押え込み工法が注目され、種々の手段
が提案されている。例えばビニール系の水溶性高分子を
主体とした化学物に難燃化剤及び防腐剤を混合したもの
を水で溶いてアスベスト層の表面に吹き付ける手段（１
９８８年２月１８日付０日経産業新聞）、アクリル系の
共重合体をベースにした塗料を吹き付ける手段（同年２
月２日付、同新聞）、その池水溶性樹脂をアスベストに
吹き付け固めた後、難燃性塗料を塗布する手段（１９８
７年１１月２７日付０日本経済新聞）等が知られている
。Among the above-mentioned methods, the push-in method has attracted particular attention, and various methods have been proposed. For example, a method (1
0 Nikkei Sangyo Shimbun, February 18, 1988), a means of spraying paint based on acrylic copolymers (2
April 2, same newspaper), a method of spraying the pond water-soluble resin onto asbestos to harden it, and then applying flame retardant paint (198
(Nihon Keizai Shimbun, November 27, 2007) are well known.
（発明が解決しようとする課題）
アスベスト層を除去する手法は、一般にアスベスト層に
水を吹き付け、壁面等からアスベスト層を剥離しながら
水で流すものであるが、水が使用できない現場において
は、−旦アスベスト層を樹脂で一体化せしめた後、剥離
作業を行う必要がある。しかしアスベスト層への樹脂の
吹き付けによって逆にアスベスト層の表面のアスベスト
繊維が空気中に飛散してしまう。(Problem to be Solved by the Invention) The general method for removing asbestos layers is to spray water on the asbestos layer and rinse it off while peeling it from walls, etc. However, in sites where water is not available, - Once the asbestos layer has been integrated with resin, it is necessary to perform peeling work. However, when resin is sprayed onto the asbestos layer, asbestos fibers on the surface of the asbestos layer are scattered into the air.
またアスベスト層の表面を被覆する押え込み手段におい
ても、被覆作業時の吹き付け塗装の初期の段階に塗装剤
の吹き付けによってアスベスト繊維がアスベスト層から
離脱して大気中に飛散してしまう。Furthermore, in the case of the pressing means for covering the surface of the asbestos layer, asbestos fibers are separated from the asbestos layer and scattered into the atmosphere due to the spraying of the coating agent during the initial stage of spray painting during the coating operation.
更にアスベスト層の除去作業や被覆層形成作業中に作業
者が現場より出入すると、作業者の着用している防塵服
に付着しているアスベスト繊維が現場以外に拡散されて
しまう。Furthermore, if a worker enters or leaves the site during asbestos layer removal work or coating layer formation work, asbestos fibers attached to the dust-proof clothing worn by the worker will be spread outside the site.
また前記り業に於て使用した防塵服や、現場内の機器の
防護のための養生シート等の表面には、作業中飛散した
アスベスト繊維が付着しているもので、前記防塵服や養
生シートの処理において、二次災害の危険性が生じてく
る。In addition, asbestos fibers scattered during work are attached to the surfaces of the dust-proof clothing and curing sheets used to protect equipment on-site. The risk of secondary disasters arises in the processing of
（課題を解決するための手段）
本発明は前記課題を鑑み、微粒子状の接着剤を散布する
と云う手段を採用することで、アスベスト処理時のアス
ベスト層の表面からのアスベスト繊維の飛散を未然に防
止し、更に二次災害の原因となる防塵服や養生シートに
付着したアスベスト繊維の処理について提、案したもの
である。(Means for Solving the Problems) In view of the above-mentioned problems, the present invention employs a method of dispersing fine particle adhesive to prevent asbestos fibers from scattering from the surface of an asbestos layer during asbestos treatment. This paper proposes ways to prevent asbestos fibers from adhering to dust-proof clothing and curing sheets, which can also cause secondary disasters.
即ち本発明に係るアスベスト層除去を基本とするアスベ
スト層の処理工法は、アスベスト層の表面からアスベス
ト繊維が離脱しない程度の弱い吹き付けを以て、当該ア
スベスト層表面に微粒子状接着剤を付着せしめた後、ア
スベスト層内にアスベスト繊維間に浸透する結合剤を吹
き付け或いは注入し、結合剤の硬化によってアスベスト
繊維を一体化せしめ、然かる後アスベスト層を壁面等か
ら剥離して廃棄することを特徴とするものである。また
アスベスト層の押さえ込みを基本とするアスベスト層の
処理工法は、アスベスト層の表面からアスベスト繊維が
離脱しない程度の弱い吹き付けを以て、当該アスベスト
層表面に微粒子状接着剤を付着せしめた後、発泡性ケイ
酸塩を発泡性ケイ酸塩を変性させない水性ポリマーディ
スパージョンを主体とした塗剤に侵入して形成した混合
物をアスベスト層表面に吹き付け或いは塗布してアスベ
スト層表面を発泡性ケイ酸塩を含有する防火層で被覆し
てなることを特徴とするものである。That is, the asbestos layer treatment method based on asbestos layer removal according to the present invention involves attaching particulate adhesive to the surface of the asbestos layer using a weak spray that does not allow asbestos fibers to separate from the surface of the asbestos layer. A method characterized by spraying or injecting a binder that penetrates between the asbestos fibers into the asbestos layer, curing the binder to integrate the asbestos fibers, and then peeling the asbestos layer off from the wall surface, etc. and disposing of it. It is. In addition, the asbestos layer treatment method, which is based on pressing down the asbestos layer, involves attaching particulate adhesive to the surface of the asbestos layer using a weak spray that does not allow the asbestos fibers to separate from the surface of the asbestos layer, and then using foamed silicone. A mixture formed by infiltrating an aqueous polymer dispersion-based coating agent that does not modify the foamable silicate with an acid salt is sprayed or applied onto the surface of the asbestos layer to form a mixture containing the foamable silicate. It is characterized by being coated with a fireproof layer.
更にアスベスト層の剥離廃棄或いは被覆層形成等のアス
ベスト層の処理作業中の作業者の出入に際して、作業者
の防塵服等に微粒子状の接着剤をアスベスト繊維が飛散
しない程度の弱い吹き付けをなし、アスベスト層の処理
を終了した後、作業現場の大気中に微粒子状の接着剤を
散布すると共に、床面や機械設備の防護に用いた養生シ
ートや作業者の防塵服に、アスベスト繊維が飛散しない
程度弱い吹き付けを以て、微粒子状の接着剤を付着せし
め、養生シート及び防塵服等を廃棄してなることを特徴
とするものである。Furthermore, when workers enter and leave the asbestos layer during processing operations such as stripping and disposing of the asbestos layer or forming a covering layer, spray fine particulate adhesive onto the worker's dust-proof clothing, etc., so as to prevent asbestos fibers from scattering. After the treatment of the asbestos layer is completed, fine particulate adhesive is dispersed into the atmosphere at the work site, and asbestos fibers are prevented from scattering on the curing sheets used to protect floors and mechanical equipment and on the dust-proof clothing of workers. This method is characterized by applying fine particles of adhesive by mild spraying, and then discarding the curing sheet, dustproof clothing, etc.
（作 用）
アスベスト層の表面に微粒子状の接着剤が付着すると、
アスベスト層表面から離脱し易い状態であったアスベス
トｔａ維が接着剤によってアスベスト層に保持されるこ
とになり、次の結合剤注入作業時や、防火層形成作業時
にアスベスト繊維の飛散が防止される。また結合剤の注
入によってアスベスト層が一体化すると、アスベスト層
を壁面等から剥離する際アスベスト繊維は大きな塊とな
るため、アスベストｔａ維の大気中への飛散が生じない
。(Function) When fine particles of adhesive adhere to the surface of the asbestos layer,
The asbestos TA fibers, which were easily detached from the surface of the asbestos layer, are now held in the asbestos layer by the adhesive, preventing the asbestos fibers from scattering during the next binder injection work or fire protection layer formation work. . Furthermore, when the asbestos layer is integrated by injecting the binder, the asbestos fibers form a large lump when the asbestos layer is peeled off from the wall surface, etc., so that asbestos TA fibers are not scattered into the atmosphere.
次に防火層についてであるが、防火層はケイ酸ナトリウ
ムに硬化剤を加えて耐水性を高め粒状若しくは粉状とし
た発泡性ケイ酸塩を、例えばアクリル系の合成樹脂エマ
ルジョンや、エポキシエステルエマルジョン等のような
前記の発泡性ケイ酸塩を変性させない水性ポリマーディ
スパージョンを主体とした塗剤に混合し、適宜水や水ガ
ラスで薄めてアス・ベスト層の表面に通常の吹き付け塗
装を行って形成したもので、前記塗剤が結合剤となって
その一部がアスベスト層の表面から浸透しアスベストと
一体となり、且つ発泡性ケイ酸塩が内在した防火層が形
成されることになる。この防火層は高温加熱を受けると
ケイ酸塩の発泡が生じ、それ自体燃えずに且つ熱を防火
層裏面に通し難いので、耐火性に優れた防火層となるも
のである。またこの防火層はアスベスト層と一体化する
と共に、防火層自体も吹き付け面金てが一体化している
ため、アスベストの壁面等からの剥離並びにアスベスト
繊維の飛散が防止されろものである。Next, regarding the fire-retardant layer, the fire-retardant layer is made by adding a curing agent to sodium silicate to increase water resistance, and is made of granular or powdered foamed silicate, such as an acrylic synthetic resin emulsion or an epoxy ester emulsion. Mix the above-mentioned foamed silicate with a coating material mainly consisting of a water-based polymer dispersion that does not modify it, dilute it with water or water glass as appropriate, and apply it to the surface of the asbestos layer in the usual way. The coating material acts as a binder, and a portion of the coating material permeates through the surface of the asbestos layer and becomes integrated with the asbestos, forming a fireproof layer containing the foamable silicate. When this fireproof layer is heated to a high temperature, silicate foams, and since it does not burn itself and makes it difficult for heat to pass through the back side of the fireproof layer, it becomes a fireproof layer with excellent fire resistance. In addition, this fireproofing layer is integrated with the asbestos layer, and the fireproofing layer itself is also integrated with a sprayed metal plate, which prevents asbestos from peeling off from the wall and scattering asbestos fibers.
更に防塵服や養生シートに微粒子状の接着剤を弱く吹き
付けると、防塵服や養生シートに付着しているアスベス
ト繊維が服等と一体化し、防塵服や養生シートを現場外
に移動させてもアスベスト繊維の飛散が生じない。Furthermore, if you lightly spray particulate adhesive onto dust-proof clothing or a protective sheet, the asbestos fibers attached to the dust-proof clothing or protective sheet will become integrated with the clothes, etc., and asbestos will remain even if the dust-proof clothing or protective sheet is moved outside the site. No fiber scattering occurs.
また微粒子状の接着剤を現場大気中に散布すると大気中
のアスベスト繊維が速やかに床面に落下し養生シート等
に付着する。Furthermore, when fine particulate adhesive is dispersed into the atmosphere at the site, asbestos fibers in the atmosphere quickly fall to the floor and adhere to curing sheets, etc.
（実施例）
次に本発明の全工程を実施した例を図面に基づいて説明
する。(Example) Next, an example in which all the steps of the present invention are implemented will be described based on the drawings.
第１区はアスベスト層を除去する工法を採用した場合に
ついて示したもので、第２図はアスベス）・層の表面に
防火層を形成する工法を採用した場合について示したも
のである。Section 1 shows the case where a method of removing the asbestos layer is used, and Figure 2 shows the case where a method of forming a fireproof layer on the surface of the asbestos layer is used.
第１図に示したアスベスト層の除去について次に説明す
る。The removal of the asbestos layer shown in FIG. 1 will now be described.
第■工程
天井面１にアスベスト層２が吹き付けられている［ｕＦ
Ｆに於て、アスベスト層２の表面に微粒子状の接着剤３
を０．３〜０．５ｋｇ／ｍ’程度の量を弱く吹き付ける
。接着剤３は例えば水性エポキシ樹脂接着剤で空気中の
酸化によって硬化するもののように霧状になるものであ
れば特に強力な接着力は要しない。Step ■Asbestos layer 2 is sprayed on the ceiling surface 1 [uF
In F, fine particle adhesive 3 is applied to the surface of asbestos layer 2.
Spray lightly at an amount of about 0.3 to 0.5 kg/m'. The adhesive 3 does not require a particularly strong adhesive force, as long as it is a water-based epoxy resin adhesive that is hardened by oxidation in the air and is atomized.
第■工程
アスベスト層２の表面に水密性のトップコート４を吹き
付け形成する。このトップコートについては耐火性や、
アスベスト層との接着性が弱くとも良く、後の第■工程
における結合剤５がアスベスト層２から分離して落下し
なければ良いものである。現場条件や結合剤５の種類に
よっては第■工程を省略できる。Step (2) A watertight top coat 4 is sprayed onto the surface of the asbestos layer 2. Regarding this top coat, it has fire resistance,
The adhesion to the asbestos layer may be weak, as long as the binder 5 in the subsequent step (2) does not separate from the asbestos layer 2 and fall. Depending on the site conditions and the type of binder 5, step (2) can be omitted.
第■工程
アスベスト繊維内に注射針を以て特殊ゴム変性エポキシ
樹脂エマルノヨン（エポキシエステルエマルジョン）の
ようにアスベスト繊維に対する浸透性が良好なアスベス
ト結合剤５を注入し、アスベスト自体を一体化する。Step (2) An asbestos binder 5 having good permeability to asbestos fibers, such as a special rubber-modified epoxy resin Emulnoyon (epoxy ester emulsion), is injected into the asbestos fibers using a syringe needle to integrate the asbestos itself.
注入量は厚さ１．５ｍｍアスベスト層に対し３〜４ｋｇ
／ｍ”程度の量とする。また前記の第■工程を省略した
場合には、結合剤５は注入せずに、表面側から吹き付け
を行う。The injection amount is 3 to 4 kg for a 1.5 mm thick asbestos layer.
/m''. If the above-mentioned step (1) is omitted, the binder 5 is not injected and is sprayed from the surface side.
商法の剥離工程（第■工程）を直ちに実施しない場合は
、前記結合剤に水ガラスを混合して吹き付け等を行い、
剥離時までの耐火性を維持せしめろようにしても良い。If the commercial law peeling step (Step ■) is not carried out immediately, mix water glass with the binder and spray it.
The fire resistance may be maintained until the time of peeling.
第■工程
一体化したアスベストを、剥離用ヘラ６を用いて天井面
１より剥がし、アスベスト繊維２′を所定の容器に収納
し廃棄する。Step (2) The integrated asbestos is peeled off from the ceiling surface 1 using a peeling spatula 6, and the asbestos fibers 2' are stored in a predetermined container and disposed of.
第■工程
作業現場の大気中に第１工程で用いた微粒子状の接着剤
を散布し、更に使用した防塵服７や化カバー並びに機械
設備の防護に用いた養生ンート８にも同様に微粒子状の
接着剤３を弱く吹き付け、表面に付着したアスベスト繊
維を防塵服等と一体化し、現場から除去する。The particulate adhesive used in the first process was sprayed into the atmosphere at the work site in the second process, and the particulate adhesive was also applied to the dust-proof clothing 7 used, the chemical cover, and the curing channel 8 used to protect the machinery and equipment. Gently spray adhesive 3 to integrate the asbestos fibers attached to the surface with dustproof clothing, etc., and remove them from the site.
現場大気中に微粒子状の接着剤を散布した場合の現場空
気のアスベス）−繊維量は、であり、散布しなかった場
合の現場空気のアスベスト處維量は、
となり、作業翌日から処理現場を平常通り使用できるも
のである。The amount of asbestos fibers in the on-site air when fine particles of adhesive are sprayed into the on-site air is , and the amount of asbestos fibers in the on-site air when no adhesive is sprayed is . It can be used normally.
以上の実施例はアスペスＩ・層の除去と云う手段を採用
した処理工法を示したもので、接着剤３及び結合剤５の
材料は前記実施例に特定されるものではなく、適宜所望
の性質を備えたものであればどのようなものでも良い。The above embodiments show a processing method that employs the removal of the Aspes I layer, and the materials for the adhesive 3 and the binder 5 are not specified in the above embodiments, but may have desired properties as appropriate. Any type of device is fine as long as it has the following.
次に第２図に示した防火層を形成する処理工法について
説明する。Next, a processing method for forming the fireproof layer shown in FIG. 2 will be explained.
第■工程
第１工程は前述した除去処理工法の第１工程と同様に、
アスベスト層２の表面に微粒子状の接着剤３を弱く吹き
付け、アスベスト層の表面から容易に飛散しそうなアス
ベスト繊維をアスベスト層２と一体する。Step (2) The first step is similar to the first step of the removal treatment method described above.
Fine particulate adhesive 3 is weakly sprayed onto the surface of the asbestos layer 2, and asbestos fibers that are likely to be easily scattered from the surface of the asbestos layer are integrated with the asbestos layer 2.
第■工程
アスベスト層２が天井面１より剥離して浮上っている個
所ａに可撓性エポキシ樹バ旨を主剤とし、硬化剤に特殊
変性ポリアミドアミン、変性脂肪族ポリアミン等を用い
た接着剤のように硬化後適宜な柔軟性を有する接着剤９
を注入し天井面１とアスベスト層２とを接着する。この
場合アスベスト層２を下方より軽く押圧しておくと良い
。Step (2) At the point a where the asbestos layer 2 has peeled off and floated from the ceiling surface 1, use an adhesive based on flexible epoxy resin and a hardening agent such as specially modified polyamide amine or modified aliphatic polyamine. Adhesive 9 having appropriate flexibility after curing, such as
is injected to bond the ceiling surface 1 and the asbestos layer 2. In this case, it is best to press the asbestos layer 2 lightly from below.
本工程は後の工程作業時に浮き上っているアスベスト層
２が天井面１よりａ脱落下しないようにするものである
。特に硬化後柔軟性を有する接着剤を用いたのは、アス
ベスト繊維の絡み合い結合力が弱く、若し硬化後固くな
る接着剤を用いろと、外部振動や後述する工程でのアス
ベスト層２に加わる僅かな重量増加によって接着剤と接
着したアスベスト繊維部分がアスベスト層２より離脱し
てしまい、接着の意義がなくなるものであり、これに対
して硬化後柔欲な接着剤の場合、建築構造物の多少の振
動や動きに対してアスベス）・層２はついていけるし、
またアスベスト層自体に多少の荷重増加があっても接着
剤と接着したアスベスト繊維がアスベスト層２より分離
しないものである。This process is to prevent the floating asbestos layer 2 from falling off the ceiling surface 1 during subsequent process operations. In particular, adhesives that are flexible after curing are used because the asbestos fibers entangle and bond strength is weak, and if an adhesive that becomes hard after curing is used, external vibrations and asbestos layer 2 will be exposed to the asbestos layer 2 in the process described below. A slight increase in weight will cause the asbestos fibers bonded to the adhesive to separate from the asbestos layer 2, rendering the bond meaningless.On the other hand, if the adhesive is flexible after curing, it will cause damage to the building structure. Asbestos layer 2 can keep up with some vibrations and movements,
Further, even if the asbestos layer itself has a slight increase in load, the asbestos fibers bonded to the adhesive will not separate from the asbestos layer 2.
第■工程
発泡性ケイ酸塩（よ、ケイ酸ナトリウムに硬化剤を加え
て耐水性を高めた粒状又は粉状物で、含水率２０％の大
阪曹達に、ＫｆＭＥＰＳコート材を用い、塗剤として水
ガラスを２０％混入したポリアクリル酸エステルエマル
ジョンを用い、両者と水を５： ５： １の割合で
混合し、アスベスト層２の表面に約２〜３ ｋｇ ／ｍ
′の割きで吹き付け乾燥させる。そうするとアスベスト
層２と一体化した約１．５〜４鴫の厚さの防火層１０が
形成された。Step 2: Expandable silicate (a granular or powdered material made by adding a hardening agent to sodium silicate to increase water resistance. Using KfMEPS coating material on Osaka Soda with a water content of 20%, it can be used as a coating material. Using a polyacrylic acid ester emulsion containing 20% water glass, the two and water are mixed in a ratio of 5:5:1, and about 2 to 3 kg/m is applied to the surface of the asbestos layer 2.
’ spray dry. As a result, a fireproof layer 10 having a thickness of about 1.5 to 4 mm was formed which was integrated with the asbestos layer 2.
当該防火Ｈ１０をトーチランプ（ブタンガス温度８００
〜１０００℃）の炎を１０分間照射したが表面が少し黒
くなったのみで変化はなかった。The fire protection H10 is heated with a torch lamp (butane gas temperature 800
Although it was irradiated with a flame of ~1000°C for 10 minutes, there was no change except that the surface became slightly black.
更に同様な手段で３０分間照射したが表面が発泡し、裏
面温度は１００℃前後であり良好な耐火性の防火層１０
が得られた。尚水ガラスを混入したのは、アスベスト層
２への接着をより良好ならしめるためである。Further, when irradiated for 30 minutes using the same method, the surface foamed and the temperature on the back surface was around 100°C, indicating that the fireproof layer 10 had good fire resistance.
was gotten. The reason why water glass was mixed was to improve adhesion to the asbestos layer 2.
また第■工程の別の実施例として、前記の発泡性ケイ酸
塩と、エポキシエステルエマルジョン（塩型化工業に、
に製： Ｅ Ｐ Ｅ −０４５０）水溶液を１： ２の
割合で混合し、これをアスベスト層２の表面に吹き付け
塗装し、防火層１０を形成した。この防火層１０は前記
同様の防火効果を有していた。この場合の水ガラスは吹
き付物質の粘度を低下させ、吹き付作業能率を向上させ
るためである。In addition, as another example of step
An aqueous solution (manufactured by EPE-0450) was mixed at a ratio of 1:2, and this was spray-painted on the surface of the asbestos layer 2 to form the fireproof layer 10. This fireproofing layer 10 had the same fireproofing effect as described above. The purpose of the water glass in this case is to reduce the viscosity of the sprayed substance and improve spraying efficiency.
尚その他ＳＢＲ，ＮＢＲのようなラテックス系のエマル
ジョンやＰＶＡＣのような樹脂エマルジョンを塗剤の主
体としても良く、更には吹き付け塗装ではなく、塗布塗
装でも良くアスベスト層の状態に応じて適宜実施できる
ものである。In addition, latex emulsions such as SBR and NBR or resin emulsions such as PVAC may be used as the main coating material, and coating may be applied instead of spraying, depending on the condition of the asbestos layer. It is.
第■工程
前記防火ＪｉｉｌＯが形成された後、アスベスト層２に
注入機等を以て特殊ゴム変性エポキシ１！エマルジヨン
（エポキシエステルエマルジョン）のようにアスベスト
繊維に対する浸透性が良好なアスベスト結合剤５を厚さ
１．５間のアスベスト層に対して３〜４ｋｇ／ｍ’の量
を注入し、アスベスト自体を一体化する。Step (2) After the fire protection layer is formed, the asbestos layer 2 is injected with special rubber modified epoxy 1! An asbestos binder 5, which has good permeability to asbestos fibers, such as emulsion (epoxy ester emulsion), is injected in an amount of 3 to 4 kg/m' into an asbestos layer with a thickness of 1.5 mm, and the asbestos itself is integrated. become
第■工程を第■工程の後にした理由は、注入した結合剤
が天井面１と防火ＲＩＯとに囲まれたアスベスト層２に
浸透していき、その表面から漏洩することがない利点が
ある。但し第■工程を第■工程の前に実施することは任
意であり、その場合は結合剤５を吹き付けによってアス
ベスト層に浸透させろ。The reason why the second step is performed after the second step is that the injected binder penetrates into the asbestos layer 2 surrounded by the ceiling surface 1 and the fire protection RIO, and has the advantage that it does not leak from the surface. However, it is optional to carry out the second step before the second step, and in that case, the binder 5 should be permeated into the asbestos layer by spraying.
結合剤５によってアスベスト層２が一体化されると、若
しアスベスト層２の一部が天井等から離脱して床面に落
下してもアスベスト繊維が飛散し空中に漂うようなこと
がないものである。更に後日アスベスト層の撤去を必要
とした際に、特にアスベスト繊維の飛散防止手段を用い
なくとも、アスベスト層２が一体化しているため容易に
剥離撤去できるものである。When the asbestos layer 2 is integrated with the binder 5, even if a part of the asbestos layer 2 detaches from the ceiling etc. and falls to the floor, asbestos fibers will not scatter and float in the air. It is. Furthermore, when it is necessary to remove the asbestos layer at a later date, the asbestos layer 2 can be easily peeled off and removed because it is integrated without using any special means for preventing scattering of asbestos fibers.
第Ｖ工程
第■工程が終了し、結合剤５が適度に硬化したら、強力
接着剤１１をパイプ注入機、注射針その他適宜な道具を
以て天井面１とアスベスト層２との境界付近に注入し、
両者を接着するものである。前記第■工程での結合剤自
体は天井面１への接着効果があるが、アスベスト層２の
天井面からの離脱をより確実に防止するために行うもの
である。After Step V and Step II have been completed and the bonding agent 5 has properly hardened, the strong adhesive 11 is injected into the vicinity of the boundary between the ceiling surface 1 and the asbestos layer 2 using a pipe injection machine, a syringe needle, or other appropriate tools.
This is what glues the two together. Although the bonding agent itself in the step ① has an adhesion effect to the ceiling surface 1, this is done in order to more reliably prevent the asbestos layer 2 from separating from the ceiling surface.
第Ｖ工程
第Ｖ工程が終了すると、防火１ｉ１１０の表面に難燃材
入りの油性ペイント（アクリル系）或いは水性ペイント
にょる）・ツブコート１２を施す。トップコート１２は
水や炭酸ガス濃度が高くなり発泡性ケイ酸塩を侵す虞が
ある個所に施すものである。Vth step When the Vth step is completed, a coating 12 of oil-based paint (acrylic paint) or water-based paint containing a flame retardant material is applied to the surface of the fire protection 1i110. The top coat 12 is applied to areas where the concentration of water or carbon dioxide is high and there is a risk of attacking the expandable silicate.
第■工程
除去処理工法における第Ｖ工程と同様に、防火層１０の
形成処理が終了すると、作業現場の大気中及び使用した
防塵服８等や養生シート９に微粒子状の接着剤３を吹き
付けるものである。Step (2) Similar to the V step in the removal treatment method, when the formation of the fireproof layer 10 is completed, fine particle adhesive 3 is sprayed into the atmosphere of the work site and onto the used dustproof clothing 8 etc. and the curing sheet 9. It is.
以上防火層形成処理工法の実施例を示したが、壁面や天
井部分でも平面上部に施されたアスベスト層のように剥
離の虞がない個所等は必要に応じて第Ｔ工程及びπ■工
程以タ１１．ｆ省略できるものであり、また各工程に用
いた接着剤、塗剤、結合剤等Ｃよ各々の目的に適したも
のであれば、任意の材質のものを採用できるものである
。Although the examples of the fire protection layer forming treatment method have been shown above, the areas where there is no risk of peeling, such as the asbestos layer applied on the top of the flat surface of walls and ceilings, may be treated as necessary after the T process and the π■ process. Ta11. F can be omitted, and any material can be used as long as it is suitable for each purpose, such as adhesives, coatings, binders, etc. used in each step.
（発明の効果）
本発明は以上の通り、アスベスト層の除去或いは防火層
による押え込み等の処理工法において、処理工程の最初
に微粒子状の接着剤をアスベスト層の表面に弱く吹き付
けるようにしたもので、処理工程中に生ずるアスベスト
層の表面からのアスベスト繊維の飛散を防止し、更に防
火層のピンホールからのアスベスト繊維の飛散が防止さ
れる。また処理工程途中における作業者の出入に際して
や、作業終了時に防塵服等や養生シートに微粒子状の接
着剤を弱く吹き付け、防塵服等に付着したアスベスト繊
維の飛散を防止したもので、アスベスト処理における周
辺へのアスベスト繊維の飛散、拡散による二次災害を未
然に防止したものである。(Effects of the Invention) As described above, the present invention is a method in which a fine particle adhesive is weakly sprayed onto the surface of an asbestos layer at the beginning of the treatment process in a treatment method such as removing an asbestos layer or suppressing it with a fireproof layer. This prevents the scattering of asbestos fibers from the surface of the asbestos layer that occurs during the treatment process, and further prevents the scattering of asbestos fibers from pinholes in the fire protection layer. In addition, fine particulate adhesive is lightly sprayed on dust-proof clothing and curing sheets when workers enter and leave during the treatment process, and at the end of the work to prevent asbestos fibers attached to dust-proof clothing from scattering. This prevents secondary disasters caused by scattering and spreading of asbestos fibers into the surrounding area.
更に作業終了時に作業現場に微粒子状の接着剤を散布す
ることで、アスベスト処理作業によって増加した空気中
に浮遊するアスベスト繊維が速やかに除去されることに
なり、アスベスト処理作業による作業現場の使用不可期
間が短くなるものである。Furthermore, by spraying fine particulate adhesive on the work site at the end of the work, asbestos fibers floating in the air that have increased due to asbestos treatment work are quickly removed, making the work site unusable due to asbestos treatment work. The period is shortened.
図ζよ本発明の実施例を示すもので、第１図は除去処理
工法の各工程を示し、第２図は防火層形成の押え込み処
理工法の各工程を示すものである。
１は天井面
２はアスベスト層
２′はアスベスト塊
３は接着剤
４はトップコート
５は結合剤
６は剥離用ヘラ
７は防塵服
８は防二筺シート
９は接着剤
１０は防火層
１１は強力接着剤
１２はトップコートFigure ζ shows an embodiment of the present invention. Figure 1 shows each step of the removal treatment method, and Figure 2 shows each step of the pressing method for forming a fireproof layer. 1 is the ceiling surface 2 is the asbestos layer 2' is the asbestos lump 3 is the adhesive 4 is the top coat 5 is the bonding agent 6 is the peeling spatula 7 is the dustproof clothing 8 is the second protective case sheet 9 is the adhesive 10 is the fireproof layer 11 Strong adhesive 12 is top coat
Claims (3)
ない程度の弱い吹き付けを以て、当該アスベスト層表面
に微粒子状接着剤を付着せしめた後、アスベスト層内に
アスベスト繊維間に浸透する結合剤を吹き付け或いは注
入し、結合剤の硬化によってアスベスト繊維を一体化せ
しめ、然かる後アスベスト層を壁面等から剥離して廃棄
することを特徴とするアスベスト層の処理工法。(1) After attaching particulate adhesive to the surface of the asbestos layer using a weak spray that does not allow the asbestos fibers to separate from the surface of the asbestos layer, spraying or injecting a binder that penetrates between the asbestos fibers into the asbestos layer. A method for treating an asbestos layer, which is characterized in that the asbestos fibers are integrated by curing a binder, and then the asbestos layer is peeled off from a wall surface, etc. and disposed of.
ない程度の弱い吹き付けを以て、当該アスベスト層表面
に微粒子状接着剤を付着せしめた後、発泡性ケイ酸塩を
発泡性ケイ酸塩を変性させない水性ポリマーディスパー
ジョンを主体とした塗剤に侵入して形成した混合物をア
スベスト層表面に吹き付け或いは塗布してアスベスト層
表面を発泡性ケイ酸塩を含有する防火層で被覆してなる
ことを特徴とするアスベスト層の処理工法。(2) After attaching the particulate adhesive to the surface of the asbestos layer by spraying so weakly that the asbestos fibers do not separate from the surface of the asbestos layer, the foamable silicate is applied to the aqueous polymer that does not modify the foamable silicate. Asbestos is characterized by being formed by spraying or applying a mixture formed by penetrating a dispersion-based coating onto the surface of the asbestos layer, and covering the surface of the asbestos layer with a fireproof layer containing expandable silicate. Layer treatment method.
スベスト層の処理作業中の作業者の出入に際して、作業
者の防塵服等に、微粒子状の接着剤をアスベスト繊維が
飛散しない程度の弱い吹き付けをなし、アスベスト層の
処理を終了した後、作業現場の大気中に微粒子状の接着
剤を散布すると共に、床面や機械設備の防護に用いた養
生シートや作業者の防塵服等に、アスベスト繊維が飛散
しない程度弱い吹き付けを以て、微粒子状の接着剤を付
着せしめ、養生シート及び防塵服等を廃棄することを特
徴とするアスベスト層の処理工法。(3) When workers come in and out during asbestos layer treatment work such as peeling off and disposing of asbestos layers or forming coating layers, spray particulate adhesive on workers' dust-proof clothing, etc., at a weak level that does not scatter asbestos fibers. After the asbestos layer has been treated, fine particulate adhesive is sprayed into the atmosphere at the work site, and asbestos is removed from the curing sheets used to protect floors and mechanical equipment, as well as the dust-proof clothing of workers. A method for treating an asbestos layer, which is characterized by applying fine particles of adhesive using a weak spray that does not scatter fibers, and disposing of curing sheets, dustproof clothing, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63152969A JPH01318660A (en) | 1988-06-21 | 1988-06-21 | Method of disposing asbestos layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63152969A JPH01318660A (en) | 1988-06-21 | 1988-06-21 | Method of disposing asbestos layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01318660A true JPH01318660A (en) | 1989-12-25 |
Family
ID=15552108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63152969A Pending JPH01318660A (en) | 1988-06-21 | 1988-06-21 | Method of disposing asbestos layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01318660A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0235164A (en) * | 1988-07-23 | 1990-02-05 | Nichiee Yoshida Kk | Eliminating method for sprayed asbestos |
| US5098506A (en) * | 1991-03-12 | 1992-03-24 | Blw, Inc. | Method and apparatus for removing floor tile mastic |
| FR2763264A1 (en) * | 1997-05-14 | 1998-11-20 | Rene Massard | Encapsulation of contaminants on or comprising friable fibrous substrate |
| JP2007146566A (en) * | 2005-11-30 | 2007-06-14 | Kikusui Chemical Industries Co Ltd | Decorating method |
| JP2007162351A (en) * | 2005-12-14 | 2007-06-28 | Kikusui Chemical Industries Co Ltd | Finishing method |
| JP2007216072A (en) * | 2005-11-04 | 2007-08-30 | Dainippon Ink & Chem Inc | Asbestos treatment agent |
| JP2007303057A (en) * | 2005-11-30 | 2007-11-22 | Fuji Ultrasonic Engineering Co Ltd | Asbestos-surrounding and solidifying treatment material and asbestos-surrounding and solidifying treatment method using the same |
| JP2010185182A (en) * | 2009-02-10 | 2010-08-26 | Shimizu Corp | Method for removing spraying material containing asbestos |
-
1988
- 1988-06-21 JP JP63152969A patent/JPH01318660A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0235164A (en) * | 1988-07-23 | 1990-02-05 | Nichiee Yoshida Kk | Eliminating method for sprayed asbestos |
| US5098506A (en) * | 1991-03-12 | 1992-03-24 | Blw, Inc. | Method and apparatus for removing floor tile mastic |
| FR2763264A1 (en) * | 1997-05-14 | 1998-11-20 | Rene Massard | Encapsulation of contaminants on or comprising friable fibrous substrate |
| JP2007216072A (en) * | 2005-11-04 | 2007-08-30 | Dainippon Ink & Chem Inc | Asbestos treatment agent |
| JP2007146566A (en) * | 2005-11-30 | 2007-06-14 | Kikusui Chemical Industries Co Ltd | Decorating method |
| JP2007303057A (en) * | 2005-11-30 | 2007-11-22 | Fuji Ultrasonic Engineering Co Ltd | Asbestos-surrounding and solidifying treatment material and asbestos-surrounding and solidifying treatment method using the same |
| JP2007162351A (en) * | 2005-12-14 | 2007-06-28 | Kikusui Chemical Industries Co Ltd | Finishing method |
| JP2010185182A (en) * | 2009-02-10 | 2010-08-26 | Shimizu Corp | Method for removing spraying material containing asbestos |
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