JP4644849B2 - Treatment method of sprayed rock wool waste - Google Patents
Treatment method of sprayed rock wool waste Download PDFInfo
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- JP4644849B2 JP4644849B2 JP2000276302A JP2000276302A JP4644849B2 JP 4644849 B2 JP4644849 B2 JP 4644849B2 JP 2000276302 A JP2000276302 A JP 2000276302A JP 2000276302 A JP2000276302 A JP 2000276302A JP 4644849 B2 JP4644849 B2 JP 4644849B2
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- Prior art keywords
- rock wool
- dry
- cement
- semi
- sprayed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、吹付けロックウール施工時に床面などに落下した廃材の処理方法に関するものである。
【０００２】
【従来の技術】
建築物の柱、梁、天井、壁などに、ロックウールとセメント及び水とを共に吹付けて、耐火被覆を形成したり、断熱性を付与したり、吸音性を改善したりするロックウール吹付け工法が実施されている。このロックウール吹付け工法には、乾式工法、湿式工法、半乾式工法がある。
【０００３】
乾式工法は、予めロックウールとセメントを混合した乾燥混合物をノズルから噴出し、これと同時にノズルの周縁に配置した複数個の噴水口より圧力水を噴射して両者を混合吹付ける工法である（特公昭４９−１３３８９号公報）。この乾式工法は、施工時にセメントやロックウールによる発塵が著しく、環境上の問題があった。
【０００４】
湿式工法は、乾式工法の欠陥を改善するためになされたもので、主材のロックウールとセメントに界面活性剤と増粘剤を配合してなる吹付け施工用被覆材を用い、これに水を加えたペーストを圧縮空気によりノズルから吹付ける工法である（特公昭５０−２４９７３号公報）。この湿式工法は、浮遊粉塵の発生はなくなったが、形成される被覆層の嵩比重が重く、乾式工法に比べてコストが高いという問題があった。
【０００５】
これに対し、半乾式工法は、予めロックウールとセメントを混合することなくセメントを水に分散させてセメントスラリーとし、このセメントスラリーとロックウールを別々のノズルから吹付け、被覆層を形成する工法である。この半乾式工法は、浮遊粉塵が減る上、乾式工法に近い嵩比重の被覆層が形成できることから、現在ロックウール吹付け工法の主流となっている。
【０００６】
従来、ロックウール吹付け作業時に床面に落下した廃材は、作業終了後に掃き集めポリ袋などに入れ、他の廃材とまとめて建設廃材として廃棄されている。吹付けロックウール廃材は、不燃性のため焼却処分ができず、また他の建築工程で生じた鉄屑、木屑、コンクリート片などが混入しており、廃材からロックウールを回収して再利用することも著しく困難である。そのうえ、軽量でかさ張るので廃棄費用も高いという問題がある。
【０００７】
最近、環境への負荷を減らす動きの中で、建設廃材の減少とその有効利用の動きが強まり、建築工事を請け負うそれぞれの工程毎の施工業者が、自己の工事で生じた廃材は自己が回収するというシステムに変わりつつある。このようなシステムにおいて、吹付け工事業者は、吹付け工事で生じた建設廃材だけを処理することになり、回収廃材中の異物を限られたものにすることが可能である。その代わり、自己の工事で生じた廃材は残らず回収する必要がある。これは、吹付け工事の際、マットを敷いたり、カーテンを張ったりして行うことで解決される。
【０００８】
このような環境で生じる吹付けロックウール廃材、特に半乾式工法の廃材は、ロックウールとセメント固化物よりなり、鉄屑等の異物を含有しないが、不燃性であって焼却できず廃棄も困難である。また、これを吹付けロックウールとして再利用することも、粒状ないし塊状の廃材をロックウール側にもセメントスラリー側にも混合することができず、仮に混合できても断熱材としての性能を落とすため困難である。なお、ここで、セメント固化物とは、セメントスラリーの半乾燥物又は半固化物を含むもので、施工当日に回収される廃材中のセメント固化物は、完全硬化には至っていない。
【０００９】
【発明が解決しようとする課題】
したがって、本発明の目的は、吹付けロックウール施工時に床面などに落下した廃材の効率的な処理方法を提供することにある。
【００１０】
【課題を解決するための手段】
本発明者は、吹付けロックウール廃材を再利用するため種々検討したころ、廃材中のロックウール及びセメント固化物は、弱いながらも水硬性又は潜在水硬性があり、更にこれを微粉砕すると水硬性がより向上し、セメントの一部をこれで置換することが可能となることを見出し、本発明を完成した。
【００１１】
すなわち、本発明は、ロックウール及びセメント固化物を主とする半乾式又は乾式吹付けロックウール廃材を、ロックウールに対してセン断作用を有する粉砕機により微粉砕し、得られた微細ロックウールを含有する微粉砕物を半乾式吹付けロックウール施工に使用するセメントスラリー中に配合することを特徴とする吹付けロックウール廃材の処理方法である。ここで、ロックウールに対してセン断作用を有する粉砕機はコロイドミルであり、微粉砕はロックウ−ルの平均長さ350μm以下になるように行われる。
【００１２】
また、本発明は、ロックウール及びセメント固化物を主とする半乾式又は乾式吹付けロックウール廃材を、ロックウールに対してセン断作用を有する粉砕機により微粉砕して得られた微粉砕物よりなることを特徴とする半乾式吹付けロックウール用混合材、あるいはセメント用混合材である。
【００１３】
以下、本発明について詳しく説明する。
本発明で処理される吹付けロックウール廃材は、ロックウール及びセメントスラリーを主材とする半乾式吹付けロックウールの施工時に発生する廃材である。この吹付けロックウール廃材としては、建築物の柱、梁、天井などに耐火被覆層や防音被覆層などを形成する目的でロックウールを吹き付ける際、床面などに落ちた廃材の他、局所集塵装置に捕集された廃材、吹付け機械の清掃廃材などが挙げられる。また、吹付けロックウール被覆の撤去工事で回収された廃材も粉砕性や水硬性がやや劣るものの同様に処理可能である。半乾式吹付けロックウール廃材は、ロックウール及びセメント固化物を主とし、通常、鉄片等の異物を含有しない。なお、処理する廃材が異物を含むおそれがある場合、必要に応じて磁力選別、篩分け等により異物を除去することがよい。
【００１４】
吹付けロックウールの主材であるロックウールは、石灰とシリカを主成分とする高温溶融物を遠心力と高圧空気で製綿したもので、高温から急冷されたガラス質のため、潜在水硬性を有する。もう一つの主材であるセメントは、完全に水和するのに長期間を必要とし、短期間ではセメント粒子表面とそれに近い部分しか水和しておらず、わずかに水硬性を示す。しかしながら、この両者を含む吹付けロックウール廃材は、セメントの強度発現性には全く及ばず、これを吹付けロックウール原料として再使用することは、強度や断熱性能からみて到底不可能である。
【００１５】
本発明においては、この吹付けロックウール廃材を、ロックウールに対しセン断作用を有する粉砕機を用いて微粉砕し、微細ロックウールを含有する微粉砕物とすることにより、吹付けロックウール原料として再使用することを実現した。吹付けロックウール廃材は、多量に含有されるロックウール繊維が緩衝材となるため、衝撃・摩擦による微粉砕機、例えばボールミル、衝撃微粉砕機、ジェット粉砕機などでは効率的な微粉砕が不可能である。ロックウール繊維を微粉砕するには、衝撃と摩擦に加えロックウール繊維に対するセン断作用が必要であり、これに適する粉砕機としては例えばコロイドミルが挙げられる。コロイドミルは、ディスクリファイナーとも称され、円錐形のローターとそれを取り囲むステーターから構成される。通常のコロイドミルは、回転数が１０００〜２００００rpm程度、ローターとステーターの間隔は数〜数十μm程度に調整できる。吹付けロックウール廃材をコロイドミルに装入すると、ロックウールは長さ数〜数十μm程度の微細繊維に微粉砕され、また繊維表面に付着したセメント固化物や小粒状のセメント固化物も微粉砕され、微細ロックウールを含有する微粉砕物が得られる。
【００１６】
微細ロックウールを含有する微粉砕物の大きさは、セメント粒子並みの数μmから数十μm程度がよいが、ロックウ−ルは繊維状物であるため、微粉砕後のロックウ−ルの平均長さが３５０μm以下、好ましくは１００μm程度がよい。この微細ロックウールは、繊維長が短すぎて吹付け用ロックウールとしては使用できないが、セメントスラリーには容易に混合することができる。微粉砕されることにより、ロックウールの潜在水硬性が向上し、またセメント固化物の表面が更新されて水硬性が著しく改善する。したがって、この微粉砕物を半乾式工法のセメントスラリーに混合してもなんら障害はない。本発明の処理方法においては、微粉砕物をそのまま又は必要に応じて磁力選別などを行ったのち、その少なくとも一部を半乾式工法用セメントの一部と置換して用いるものである。
【００１７】
建築工事における廃材の自己処理の観点から、吹付け施工現場に吹付け機械及び粉砕機を備え、回収した廃材を粉砕機に装入し、得られた微粉砕物をその施工現場で使用することが好ましい態様の一つである。すなわち、微粉砕物及びポルトランドセメント、高炉セメント等のセメントを水にかく拌混合して微粉砕物配合セメントスラリーを調合し、これを半乾式工法のセメントスラリーとして用いる。吹付けガンの閉塞を防止するため、微粉砕物配合セメントスラリーはフィルターを通過させるとよい。
【００１８】
微粉砕物配合セメントスラリーにおける微粉砕物の置換割合は、微粉砕物がセメントに近い強度発現性を有するので特に制限はなく、通常、セメントの１〜８０重量％程度、好ましくは５〜５０重量％程度がよい。多量の吹付けロックウール廃材が発生する大きな工事現場では、得られた微粉砕物を多量に配合するよりも、少量を平均的に配合することが被覆層の性能面から好ましい。通常、半乾式工法におけるセメントスラリー濃度は３３％程度とされ、吹付け施工時のセメントスラリーの吐出量はロックウール６０〜７５重量部：セメント２５〜４０重量部程度とされ、本発明で微粉砕物を配合する場合もほぼ同様でよい。
【００１９】
次に、小規模の吹付けロックウール工事や、吹付けロックウール被覆の撤去工事など、現場で再使用が困難な場合、回収した廃材を処理センターなどへ運び込み、ここで微粉砕し、そのまま又は磁力選別などを行ったのち紙袋、ポリ袋などに梱包した製品とすることが好ましい態様の一つである。前記のように、この微粉砕物は水硬性を有し、セメントの一部をこれで置換できるので、半乾式吹付けロックウール用混合材やセメント混合材として有用である。製品は処理後可及的速やかに使用することが好ましいが、数ヶ月程度保管しても支障はない。この場合、水分を含んだままにしておくと硬化が進むので、長期保管に当たっては十分乾燥させることが好ましい。
【００２０】
また、この微粉砕物から空気分級などで微細ロックウールを分離回収することもでき、この微細ロックウールはプラスチックや各種パテのフィラー、塗料等のタレ防止剤などに有用である。
【００２１】
なお、本発明の処理方法は、半乾式吹付けロックウール廃材のみならず、乾式吹付けロックウール廃材の処理にも適用可能である。乾式吹付けロックウール廃材の場合は、これを半乾式吹き付けロックウールのセメント含有スラリー中に配合する。
【００２２】
【実施例】
実施例１
半乾式吹付けロックウール施工現場の床面に落下した廃材を掃き集めて、嵩比重１００〜１５０kg/m3 、含水率５〜２０wt％の廃材を回収した。回収率は、全吹付け量の約５％（固形分として）であり、これを水分の自然蒸発によって若干乾燥させたのち次の要領で微粉砕した。粉砕機として、株式会社長谷川鉄工所製のスーパーファイブレーター６００型を用い、回転数１７５０rpm、ローターとステーターの間隔０．１μmとし、これに廃材を２m3装入して微粉砕した。得られた微粉砕物の顕微鏡観察の結果、微細ロックウールの平均繊維長は９３μmであった。
【００２３】
高炉セメント（新日鐵高炉セメント株式会社製）１００重量部、上記微粉砕物１０重量部と水２２０重量部をスラリー調合槽に入れ、かく拌機でかく拌しながら混合し、固形分濃度３３％の微粉砕物配合セメントスラリーを調合した。次いで、ロックウール粒状綿を吹付け用解繊機を通過させたものと、上記スラリーを目開き０．９６mmの金属製フィルターを通過させたものを、通常の半乾式吹付け機械を用いてロックウール１００重量部：スラリー２００重量部の割合で、鉄骨製梁に厚さ５０mmに吹き付ける試験を行った。形成された被覆は、絶乾嵩比重が０．３６であり、２時間耐火性能を有することが認められた。
【００２４】
実施例２
実施例１の微粉砕物配合セメントスラリーの調合において、高炉セメント７０重量部、実施例１の微粉砕物３０重量部とした以外は実施例１と同様にして吹付け試験を行ったところ、形成された被覆は、絶乾嵩比重が０．３５であり、２時間耐火性能を有することが認められた。
【００２５】
【発明の効果】
本発明の吹付けロックウール廃材の処理方法によれば、これまで廃棄されていた半乾式吹付けロックウール廃材を吹付け施工現場で回収、再使用することを可能とし、現場における自己処理が実現するとともに建築廃材として廃棄する必要がなくなった。また、半乾式又は乾式吹付けロックウール廃材を微粉砕して得られた微粉砕物は、半乾式吹付けロックウール用混合材やセメント混合材として好適であり、吹付けロックウール廃材の再利用を達成するものである。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for treating waste material that has fallen on a floor surface or the like during construction of spray rock wool.
[0002]
[Prior art]
Rock wool blown by spraying rock wool, cement and water together on pillars, beams, ceilings, walls, etc. of buildings to form a fireproof coating, to provide heat insulation, and to improve sound absorption Attaching method is implemented. The rock wool spraying method includes a dry method, a wet method, and a semi-dry method.
[0003]
The dry construction method is a construction method in which a dry mixture in which rock wool and cement are mixed in advance is ejected from a nozzle, and at the same time, pressure water is ejected from a plurality of fountain ports arranged on the periphery of the nozzle, and both are mixed and sprayed ( Japanese Patent Publication No. 49-13389). This dry method has a problem of environment due to significant dust generation due to cement and rock wool during construction.
[0004]
The wet construction method was made to improve the defects of the dry construction method, using a coating material for spray construction that is composed of a rock wool and cement as the main ingredients and a surfactant and a thickening agent. This is a method of spraying a paste added with a pressure from a nozzle with compressed air (Japanese Patent Publication No. 50-24973). In this wet method, the generation of suspended dust is eliminated, but the bulk density of the coating layer to be formed is heavy, and there is a problem that the cost is higher than that of the dry method.
[0005]
On the other hand, the semi-dry method is a method in which cement is dispersed in water without mixing rock wool and cement in advance to form cement slurry, and this cement slurry and rock wool are sprayed from separate nozzles to form a coating layer. It is. This semi-dry method is the mainstream of the rock wool spraying method because it reduces suspended dust and can form a coating layer with a bulk density close to that of the dry method.
[0006]
Conventionally, waste materials that have fallen to the floor during rock wool spraying work are swept up after completion of the work and placed in a plastic bag or the like, and discarded together as construction waste materials together with other waste materials. Blowing rockwool waste material cannot be incinerated because it is nonflammable, and it contains iron scraps, wood scraps, concrete fragments, etc., generated in other construction processes. Rockwool is recovered from the waste and reused. It is also extremely difficult. In addition, there is a problem that the disposal cost is high because it is light and bulky.
[0007]
Recently, the movement of reducing construction waste materials and the effective use of them has been strengthened in the movement to reduce the burden on the environment, and the contractor for each process that undertakes the construction work collects the waste materials generated by their own work by themselves. The system is changing. In such a system, the spraying contractor processes only the construction waste generated by the spraying work, and can limit the foreign matters in the recovered waste. Instead, it is necessary to collect all the waste materials generated by the construction work. This can be solved by laying a mat or stretching a curtain during spraying work.
[0008]
Blowing rockwool waste material generated in such an environment, especially semi-dry type waste material, consists of rock wool and cement solidified material and does not contain foreign matter such as iron scrap, but is nonflammable and cannot be incinerated and is difficult to dispose of. It is. In addition, it can be reused as sprayed rock wool, and granular or lump waste materials cannot be mixed on either the rock wool side or the cement slurry side, and even if they can be mixed, the performance as a heat insulating material is reduced. It is difficult. Here, the cement solidified material includes a semi-dried material or a semi-solidified material of cement slurry, and the cement solidified material in the waste material collected on the construction day has not been completely cured.
[0009]
[Problems to be solved by the invention]
Therefore, the objective of this invention is providing the efficient processing method of the waste material which fell on the floor surface etc. at the time of spray rock wool construction.
[0010]
[Means for Solving the Problems]
When the present inventor made various studies in order to reuse the sprayed rock wool waste material, the rock wool and cement solidified material in the waste material are weak but hydraulic or latent hydraulic. The present inventors have found that the hardness is further improved and that a part of the cement can be replaced by this, and the present invention has been completed.
[0011]
That is, the present invention provides a fine rock wool obtained by finely pulverizing semi-dry or dry sprayed rock wool waste mainly composed of rock wool and cement solidified with a pulverizer having a cutting action on rock wool. Is a processing method for sprayed rock wool waste material, characterized in that a finely pulverized product containing selenium is blended in a cement slurry used for semi-dry spray rock rock construction. Here, the pulverizer having a cutting action on the rock wool is a colloid mill, and the fine pulverization is performed so that the average length of the rock wool is 350 μm or less.
[0012]
Further, the present invention provides a finely pulverized product obtained by finely pulverizing semi-dry or dry sprayed rock wool waste mainly composed of rock wool and cement solidified with a pulverizer having a cutting action on rock wool. A mixed material for semi-dry sprayed rock wool or a mixed material for cement, characterized by comprising:
[0013]
The present invention will be described in detail below.
The blown rock wool waste material treated in the present invention is a waste material generated during construction of semi-dry type blown rock wool mainly composed of rock wool and cement slurry. This blown rock wool waste material includes not only waste material that has fallen on the floor surface, but also local collection when rock wool is blown for the purpose of forming a fireproof coating or soundproof coating on pillars, beams, ceilings, etc. of buildings. Waste materials collected by dust devices, cleaning waste materials for spraying machines, and the like. In addition, the waste material recovered by the removal work of the spray rock wool coating can be treated in the same manner, although the grindability and hydraulicity are slightly inferior. Semi-dry spray rock wool waste mainly consists of rock wool and cement solidified material, and usually does not contain foreign matters such as iron pieces. In addition, when there is a possibility that the waste material to be processed contains a foreign substance, it is preferable to remove the foreign substance by magnetic separation, sieving, or the like as necessary.
[0014]
Rock wool, the main material of sprayed rock wool, is made of high-temperature melt mainly composed of lime and silica with centrifugal force and high-pressure air. Have Another main material, cement, requires a long period of time for complete hydration, and in a short period of time, only the surface of the cement particle and a portion close thereto are hydrated and show a slight hydraulic property. However, the blown rock wool waste material containing both of them does not reach the strength development of cement at all, and it is impossible to reuse it as a blown rock wool raw material in view of strength and heat insulation performance.
[0015]
In the present invention, this blown rock wool waste material is finely pulverized using a pulverizer having a cutting action on rock wool to obtain a finely pulverized product containing fine rock wool. Realized to be reused as. Blowing rockwool waste material contains a large amount of rockwool fiber as a cushioning material, so efficient pulverization is not possible with a fine pulverizer such as a ball mill, an impact pulverizer, or a jet pulverizer. Is possible. In order to finely pulverize the rock wool fiber, it is necessary to have a shearing action on the rock wool fiber in addition to impact and friction. An example of a pulverizer suitable for this is a colloid mill. The colloid mill is also called a disc refiner, and is composed of a conical rotor and a stator surrounding it. A normal colloid mill can be adjusted to have a rotation speed of about 1000 to 20000 rpm and a distance between the rotor and the stator of about several to several tens of μm. When sprayed rockwool waste material is charged into a colloid mill, rockwool is finely pulverized into fine fibers with a length of several to several tens of μm, and cement solidified products and small granular cement solidified particles adhering to the fiber surface are also finely divided. A finely pulverized product containing fine rock wool is obtained by pulverization.
[0016]
The size of the finely pulverized product containing fine rock wool is preferably about several μm to several tens of μm, which is the same as that of cement particles. However, since the rock wall is a fibrous material, the average length of the rock wall after fine pulverization The thickness is 350 μm or less, preferably about 100 μm. Although this fine rock wool is too short to be used as a spray rock wool, it can be easily mixed with cement slurry. By being finely pulverized, the latent hydraulic property of rock wool is improved, and the surface of the cement solidified material is renewed to significantly improve the hydraulic property. Therefore, there is no obstacle even if this finely pulverized product is mixed with a semi-dry cement slurry. In the treatment method of the present invention, the finely pulverized product is used as it is or after magnetic separation as necessary, and at least a part thereof is replaced with a part of the cement for the semi-dry construction method.
[0017]
From the viewpoint of self-treatment of waste materials in building construction, a spraying machine and a pulverizer are installed at the spraying construction site, the collected waste material is charged into the pulverizer, and the resulting finely pulverized material is used at the construction site. Is one of the preferred embodiments. That is, a finely pulverized material and cement such as Portland cement and blast furnace cement are mixed with water to prepare a finely pulverized material-mixed cement slurry, which is used as a cement slurry for a semi-dry method. In order to prevent clogging of the spray gun, the finely pulverized blended cement slurry is preferably passed through a filter.
[0018]
The replacement ratio of the finely ground product in the finely ground product-containing cement slurry is not particularly limited because the finely ground product has a strength development property close to that of cement, and is usually about 1 to 80% by weight, preferably 5 to 50% by weight of the cement. % Is good. In a large construction site where a large amount of sprayed rock wool waste is generated, it is preferable from the viewpoint of the performance of the coating layer to mix a small amount on average rather than a large amount of the obtained finely pulverized product. Usually, the cement slurry concentration in the semi-dry method is about 33%, and the discharge amount of the cement slurry at the time of spraying is about 60 to 75 parts by weight of rock wool: about 25 to 40 parts by weight of cement. The same may be applied when blending the products.
[0019]
Next, when it is difficult to reuse on-site, such as small-scale spray rock wool construction or removal of spray rock wool coating, carry the collected waste material to a processing center, etc., and pulverize it as it is or It is one of the preferred embodiments that the product is packed in a paper bag, a plastic bag, etc. after magnetic separation. As described above, this finely pulverized product has hydraulic properties, and a part of the cement can be replaced by this, so that it is useful as a semi-dry spray rock wool mixture or cement mixture. It is preferable to use the product as soon as possible after processing, but there is no problem even if it is stored for several months. In this case, since the curing proceeds when the moisture is kept, it is preferable to dry it sufficiently for long-term storage.
[0020]
In addition, fine rock wool can be separated and recovered from the finely pulverized product by air classification or the like, and this fine rock wool is useful as an anti-sagging agent for plastics, various putty fillers, paints and the like.
[0021]
The treatment method of the present invention can be applied not only to semi-dry sprayed rock wool waste material but also to dry spray rock wool waste material. In the case of dry-type blown rock wool waste, this is blended in a semi-dry-type blown rock wool cement-containing slurry.
[0022]
【Example】
Example 1
The waste material dropped on the floor surface of the semi-dry spray rock wool construction site was swept up to collect the waste material having a bulk specific gravity of 100 to 150 kg / m 3 and a water content of 5 to 20 wt%. The recovery rate was about 5% of the total spraying amount (as a solid content), which was slightly dried by natural evaporation of water and then pulverized in the following manner. As a pulverizer, Hasegawa Iron Works Co., Ltd. Super Fibrator 600 type was used, the rotational speed was 1750 rpm, the distance between the rotor and the stator was 0.1 μm, and 2 m 3 of the waste material was charged and pulverized. As a result of microscopic observation of the finely pulverized product, the average fiber length of the fine rock wool was 93 μm.
[0023]
100 parts by weight of blast furnace cement (manufactured by Nippon Steel Blast Furnace Cement Co., Ltd.), 10 parts by weight of the finely pulverized product, and 220 parts by weight of water are placed in a slurry preparation tank and mixed while stirring with a stirrer. A finely pulverized blended cement slurry was prepared. Next, the rock wool granular cotton passed through a spraying defibrator and the above-mentioned slurry passed through a metal filter with an opening of 0.96 mm were mixed with rock wool using a normal semi-dry spraying machine. A test was performed in which the steel beam was sprayed to a thickness of 50 mm at a ratio of 100 parts by weight to 200 parts by weight of the slurry. The formed coating was found to have an absolute dry bulk specific gravity of 0.36 and a fire resistance of 2 hours.
[0024]
Example 2
When the spray test was conducted in the same manner as in Example 1 except that 70 parts by weight of blast furnace cement and 30 parts by weight of the finely pulverized product of Example 1 were prepared in the preparation of the finely pulverized product-mixed cement slurry of Example 1, formation was performed. The coated coating was found to have an absolute dry bulk specific gravity of 0.35 and a fire resistance of 2 hours.
[0025]
【The invention's effect】
According to the method for treating blown rock wool waste material of the present invention, semi-dry type blown rock wool waste material that has been disposed so far can be collected and reused at the spray construction site, and self-treatment at the site is realized. And it is no longer necessary to dispose of it as building waste. In addition, the finely pulverized product obtained by finely pulverizing semi-dry type or dry-type spray rock rock waste is suitable as a semi-dry type spray rock wool mixed material or cement mixture, and reuse of spray rock wool waste Is achieved.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| JP2000276302A JP4644849B2 (en) | 2000-09-12 | 2000-09-12 | Treatment method of sprayed rock wool waste |
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| JP2000276302A JP4644849B2 (en) | 2000-09-12 | 2000-09-12 | Treatment method of sprayed rock wool waste |
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| JP2002087871A JP2002087871A (en) | 2002-03-27 |
| JP4644849B2 true JP4644849B2 (en) | 2011-03-09 |
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| JP6737619B2 (en) * | 2016-03-31 | 2020-08-12 | 太平洋マテリアル株式会社 | Rock wool spraying method and apparatus |
| JP7297352B1 (en) * | 2023-01-31 | 2023-06-26 | 孝則 吉川 | Method for collecting fallen cotton, method for spraying recycled spraying material, method for manufacturing recycled material, method for manufacturing container containing recycled material, container containing recycled material, and method for manufacturing ground improvement material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07158280A (en) * | 1993-12-10 | 1995-06-20 | Ask:Kk | Method and device for recycling spray dropped cotton |
| JPH07166618A (en) * | 1993-12-14 | 1995-06-27 | Ask:Kk | Spray waste cotton processing device |
| JPH07259210A (en) * | 1994-03-18 | 1995-10-09 | Ask:Kk | Treatment method and device for fallen sprayed rock wool |
| JPH10279336A (en) * | 1997-04-01 | 1998-10-20 | Techno Sakato:Kk | Method for recycling demolished building waste and system therefor |
| JPH11116296A (en) * | 1997-10-21 | 1999-04-27 | Ask Corp | Treatment for recycling of waste cotton and apparatus therefor |
-
2000
- 2000-09-12 JP JP2000276302A patent/JP4644849B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07158280A (en) * | 1993-12-10 | 1995-06-20 | Ask:Kk | Method and device for recycling spray dropped cotton |
| JPH07166618A (en) * | 1993-12-14 | 1995-06-27 | Ask:Kk | Spray waste cotton processing device |
| JPH07259210A (en) * | 1994-03-18 | 1995-10-09 | Ask:Kk | Treatment method and device for fallen sprayed rock wool |
| JPH10279336A (en) * | 1997-04-01 | 1998-10-20 | Techno Sakato:Kk | Method for recycling demolished building waste and system therefor |
| JPH11116296A (en) * | 1997-10-21 | 1999-04-27 | Ask Corp | Treatment for recycling of waste cotton and apparatus therefor |
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