JPH0447093B2 - - Google Patents
Info
- Publication number
- JPH0447093B2 JPH0447093B2 JP61072321A JP7232186A JPH0447093B2 JP H0447093 B2 JPH0447093 B2 JP H0447093B2 JP 61072321 A JP61072321 A JP 61072321A JP 7232186 A JP7232186 A JP 7232186A JP H0447093 B2 JPH0447093 B2 JP H0447093B2
- Authority
- JP
- Japan
- Prior art keywords
- watsuful
- core
- concrete
- covering
- construction method
- 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.)
- Expired - Lifetime
Links
- 239000006260 foam Substances 0.000 claims description 15
- 238000010276 construction Methods 0.000 claims description 14
- 229920000098 polyolefin Polymers 0.000 claims description 6
- 229920003002 synthetic resin Polymers 0.000 claims description 6
- 239000000057 synthetic resin Substances 0.000 claims description 6
- 239000004794 expanded polystyrene Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Description
【発明の詳細な説明】
＜技術分野＞
この発明は合成樹脂発泡体によるワツフル芯を
用いたワツフルスラブ施工法に関し、コンクリー
ト打設個所からワツフル芯の除去を容易にした施
工法である。[Detailed Description of the Invention] <Technical Field> The present invention relates to a Watsufuru slab construction method using a Watsufuru core made of synthetic resin foam, and is a construction method that facilitates the removal of the WatsuFuru core from a place where concrete is to be poured.
＜従来技術＞
従来より天井施工等において天井面に空洞を形
成して空洞間をリブ構造としてできるだけスパン
を長くとれるようにすべく、コンクリート打設個
所に予め、抜きテーパーを大きくつけたワツフル
芯を空洞形成用として設置しておきコンクリート
打設を行なつていた。特にワツフル芯としては、
取扱い上軽量で至便な発泡ポリスチレン等の合成
樹脂発泡体によるものを用いるようになつてきた
が、コンクリート打設後にワツフル芯を切断除去
するのではなく、再使用可能な状態で離脱除去す
ることが経済性の点からも要求されてきた。<Conventional technology> Conventionally, in ceiling construction, etc., in order to form cavities on the ceiling surface and create a rib structure between the cavities to make the span as long as possible, a Watsuful core with a large punch taper was placed in advance at the place where concrete was to be poured. It had been installed to form a cavity and concrete was being poured. Especially as a Watsuful core,
Synthetic resin foams such as expanded polystyrene have come to be used because they are lightweight and easy to handle, but rather than cutting and removing the Watsuful core after concrete is poured, it is now possible to detach and remove it in a reusable state. It has also been demanded from the point of view of economic efficiency.
そのため、ワツフル芯に離型剤を塗布してみた
がうまく抜けないゆえ、第３図のごとくコンプレ
ツサー５０よりの圧縮空気をもつてワツフル芯Ｗ
の離脱を助成しようとしたり、第４図のごとくワ
ツフル芯Ｗの近辺のコンクリートＣ部分をパイプ
サポート５１，５１にて支えておき、ワツフル芯
Ｗを引張装置５２にて引き落そうと試みてみた。
しかし、前者の場合、圧縮空気のみではワツフル
芯ＷとコンクリートＣとの間に少しでも隙間があ
ると圧縮空気が逃げて離脱がうまくできない欠点
があり、後者の場合、ワツフル芯Ｗの一部が割れ
て引張装置５２との連結部分と共に外れたりする
ことが多く、ワツフル芯Ｗを再使用可能な状態で
離脱させることが難しいものであつた。 Therefore, I tried applying a mold release agent to the Watsuful core, but it did not come off properly, so I applied compressed air from the compressor 50 to the Watsuful core W as shown in Figure 3.
As shown in Figure 4, I supported the concrete C part near the Watsuful core W with pipe supports 51, 51, and tried to pull down the Watsuful core W with the tension device 52. .
However, in the former case, if only compressed air is used, if there is even a slight gap between the Watsuful core W and the concrete C, the compressed air will escape and the separation will not be successful.In the latter case, a part of the Watsuful core W It often breaks and comes off along with the connecting part to the tensioning device 52, making it difficult to remove the Watsuful core W in a reusable state.
ワツフル芯Ｗの離脱が難かしいのは、コンクリ
ートの養生過程でワツフル芯Ｗを締め付ける方向
にコンクリートの収縮力が作用することに因るも
のであるり、発泡体製のワツフル芯Ｗの表面の平
滑性を出すために発泡体表面を皮付のものにして
も上記収縮力によつてうまく離脱し難い現状であ
つた。 The difficulty in detaching the Watsuful core W is due to the shrinkage force of the concrete acting in the direction that tightens the Watsuful core W during the curing process of the concrete, or due to the smoothness of the surface of the Watsuful core W made of foam. Even if the surface of the foam was made to have a skin to improve its properties, it was difficult to remove it properly due to the above-mentioned shrinkage force.
＜目的＞
そこで、この発明の目的としては、合成樹脂発
泡体からなるワツフル芯をコンクリート打設部分
から再使用可能な状態で離脱できるワツフルスラ
ブ施工法を開発した点に在る。<Purpose> Therefore, an object of the present invention is to develop a Watsuful slab construction method in which a Watsuful core made of synthetic resin foam can be removed from a concrete-cast area in a reusable state.
＜構成＞
上記目的達成のための施工法については、合成
樹脂の発泡体からなるワツフル芯に対しポリオレ
フイン系発泡シートからなる被覆体を被せてお
き、コンクリート打設した後コンクリート打設個
所からワツフル芯および被覆体を取り除くことを
特徴としている。<Structure> Regarding the construction method to achieve the above objective, a covering made of a polyolefin foam sheet is covered over a Watsuful core made of synthetic resin foam, and after concrete is poured, the Watsuful core is inserted from the place where the concrete is poured. and removing the covering.
＜実施例＞
次いで、この発明の実施例について、図を参照
しながら以下に説明する。<Example> Next, an example of the present invention will be described below with reference to the drawings.
図におけるＷはワツフル芯を示しており、発泡
ポリスチレン粒子等を加熱融着させたビーズ成形
品からなるもので、型内成形されたままのもの或
は型内成形したものを所要寸法のワツフル形状に
形成したものの何れでもよく、表面がFRP仕上
げされる場合もある。ワツフル芯Ｗの形状として
は寸法は種々のものがあるが、周側面が抜き易い
テーパー状をなす図示する形状のものである。標
準的な寸法例としては、図のＢ＝910、Ｆ＝810、
Ｈ＝270［単位mm］である。 W in the figure indicates a Watsuful core, which is made of a bead molded product made by heat-sealing foamed polystyrene particles, etc., and it is formed as it is in a mold, or it is shaped into a Watsuful core of the required dimensions. The surface may be finished with FRP. Although there are various shapes and dimensions of the Watsuful core W, the shape shown in the figure has a tapered peripheral surface that is easy to pull out. Examples of standard dimensions are B=910, F=810,
H=270 [unit: mm].
なお、ワツフル芯Ｗには空気孔ａを形成して実
施するのがワツフル芯の除去上望ましい。 Note that it is preferable to form air holes a in the watsufuru wick W for the purpose of removing the watsufuru wick.
１０はワツフル芯Ｗの少なくともコンクリート
打設面に被せる被覆体であり、ポリオレフイン系
の発泡シートから形成され、ワツフル芯Ｗの形状
と対応するキヤツプ形態のものであり、通常２〜
３mm厚程度のポリエチレン発泡シート、ポリプロ
ピレン発泡シートが好ましいもので、シート成形
した成形品による被覆体が好ましい。 Reference numeral 10 denotes a covering body to cover at least the concrete casting surface of the Watsuful core W, which is formed from a polyolefin foam sheet and has a cap shape corresponding to the shape of the Watsuful core W, and is usually 2 to 2.
A polyethylene foam sheet or a polypropylene foam sheet with a thickness of about 3 mm is preferred, and a covering made of a sheet-molded product is preferred.
そして天井施工等において、先ず、予めワツフ
ル芯Ｗに上記した被覆体１０を被せた状態で所要
間隔おきに配置しておき（第１図参照）、コンク
リートを打設する。そしてコンクリートの打設後
養生して固化後（固化前でも崩形しない段階なら
ば可能）ワツフル芯Ｗをコンクリート打設個所か
ら取除き、次いでポリオレフイン系発泡シートか
らなる被覆体１０をコンクリート部分から剥離し
て取除き、空洞を形成する。尚、コンクリートは
打設後、固化する迄の間にワツフル芯Ｗを締め付
ける方向に収縮力を発揮するが、ワツフル芯Ｗの
外側を被覆しているポリオレフイン系発泡シート
からなる被覆体１０の部分での弾性的な収縮にて
上記コンクリート収縮力に対処でき、ワツフル芯
Ｗは従来の工法に比べはるかに取除き易いものと
なる。 In ceiling construction, etc., first, Watsuful cores W are covered with the above-mentioned coverings 10 and placed at required intervals (see FIG. 1), and concrete is poured. Then, after the concrete is placed and cured and solidified (this is possible if it does not collapse even before hardening), the Watsuful core W is removed from the place where the concrete is placed, and then the covering 10 made of polyolefin foam sheet is peeled off from the concrete part. and remove to form a cavity. It should be noted that concrete exerts a contractile force in the direction of tightening the Watsuful core W after it is poured and until it hardens, but the shrinkage force is exerted in the covering body 10 made of a polyolefin foam sheet that covers the outside of the Watsuful core W. The elastic contraction of the concrete can cope with the concrete shrinkage force, and the Watsuful core W is much easier to remove than conventional construction methods.
施工上、ワツフル芯Ｗとしては、発泡ポリスチ
レンのほか、ポリオレフイン系樹脂とポリスチレ
ン系樹脂とが一部グラフト結合した樹脂粒子（商
品名：ピオセラン、積水化成品工業株式会社製）
をもつて成形したものが一層好ましいものであ
る。 For construction purposes, the Watsuful core W can be made of expanded polystyrene or resin particles (product name: PIOCELAN, manufactured by Sekisui Plastics Co., Ltd.) in which polyolefin resin and polystyrene resin are partially grafted together.
It is even more preferable to use a molded product with the following properties.
なお、ワツフル芯の除去に際し、従来の圧縮空
気、或は引張装置等による助成手段を併用するこ
とも可能である。 In addition, when removing the Watsuful core, it is also possible to use a conventional assisting means such as compressed air or a tension device.
＜効果＞
上記のごとく、この発明のワツフルスラブ施工
法によると、合成樹脂のワツフル芯Ｗに対し、ポ
リオレフイン系発泡シートからなる柔軟で弾力性
に優れた被覆体１０を被せておいて、コンクリー
ト打設するので、打設後におけるコンクリートの
収縮力を被覆体部分で対応でき、ワツフル芯Ｗの
取除きが非常に簡単に行なえることにあり、ワツ
フル芯Ｗが割れたりすることなく充分再使用が可
能な状態で回収できることになり、作業性が向上
するだけでなく、経済性の点でも非常に利点があ
る施工法となる。<Effects> As described above, according to the Watsuful slab construction method of the present invention, the synthetic resin Watsuful core W is covered with a flexible and highly elastic covering 10 made of a polyolefin foam sheet, and concrete is poured. Therefore, the shrinkage force of the concrete after pouring can be handled by the covering part, and the Watsuful core W can be removed very easily, making it possible to fully reuse the Watsuful core W without cracking it. This construction method not only improves work efficiency but also has great economic advantages.
第１図はこの発明の実施例を示すコンクリート
打設前における一部欠截斜視図、第２図は要部の
断面図、第３図および第４図は従来の施工法を示
す概要断面図である。
Ｗ……ワツフル芯、１０……被覆体、Ｃ……コ
ンクリート。
Fig. 1 is a partially cutaway perspective view showing an embodiment of the present invention before concrete pouring, Fig. 2 is a sectional view of the main part, and Figs. 3 and 4 are schematic sectional views showing the conventional construction method. It is. W...Watsuful core, 10...Coating, C...Concrete.
Claims (1)
ポリオレフイン系発泡シートからなる被覆体を被
せておき、コンクリート打設した後コンクリート
打設個所からワツフル芯および被覆体を取り除く
ことを特徴とするワツフルスラブ施工法。 ２ コンクリート打設個所からのワツフル芯の除
去に圧縮空気等の助成手段を併用する上記特許請
求の範囲第１項記載のワツフルスラブ施工法。 ３ コンクリート打設個所から先にワツフル芯を
除去した後に被覆体をコンクリート打設個所から
剥離する上記特許請求の範囲第１項記載のワツフ
ルスラブ施工法。[Claims] 1. A Watsufuru core made of a synthetic resin foam is covered with a covering made of a polyolefin foam sheet, and after concrete is poured, the Watsufuru core and the covering are removed from the place where the concrete is poured. The characteristic Watsuful slab construction method. 2. The Watsuful slab construction method as set forth in claim 1, in which assisting means such as compressed air is used in conjunction with the removal of the Watsuful core from the concrete placement site. 3. The Watsuful slab construction method according to claim 1, wherein the Watsuful core is first removed from the concrete placement area, and then the covering is peeled off from the concrete placement area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7232186A JPS62228566A (en) | 1986-03-28 | 1986-03-28 | Construction of waffle slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7232186A JPS62228566A (en) | 1986-03-28 | 1986-03-28 | Construction of waffle slab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62228566A JPS62228566A (en) | 1987-10-07 |
| JPH0447093B2 true JPH0447093B2 (en) | 1992-08-03 |
Family
ID=13485900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7232186A Granted JPS62228566A (en) | 1986-03-28 | 1986-03-28 | Construction of waffle slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62228566A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61183562A (en) * | 1985-02-07 | 1986-08-16 | 鐘淵化学工業株式会社 | Demolding of mold frame for molding horizontal slab with reinforcing rib |
-
1986
- 1986-03-28 JP JP7232186A patent/JPS62228566A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61183562A (en) * | 1985-02-07 | 1986-08-16 | 鐘淵化学工業株式会社 | Demolding of mold frame for molding horizontal slab with reinforcing rib |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62228566A (en) | 1987-10-07 |
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