JPH03199561A - Precast concrete body - Google Patents
Precast concrete bodyInfo
- Publication number
- JPH03199561A JPH03199561A JP33646789A JP33646789A JPH03199561A JP H03199561 A JPH03199561 A JP H03199561A JP 33646789 A JP33646789 A JP 33646789A JP 33646789 A JP33646789 A JP 33646789A JP H03199561 A JPH03199561 A JP H03199561A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- cylindrical body
- precast concrete
- fibrous
- fireproof
- 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.)
- Granted
Links
- 239000011178 precast concrete Substances 0.000 title claims abstract description 22
- 239000002657 fibrous material Substances 0.000 claims abstract description 30
- 239000004567 concrete Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 3
- 239000004917 carbon fiber Substances 0.000 abstract description 3
- 239000000919 ceramic Substances 0.000 abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 229920006231 aramid fiber Polymers 0.000 abstract description 2
- 239000003822 epoxy resin Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 229920000647 polyepoxide Polymers 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000011210 fiber-reinforced concrete Substances 0.000 description 1
- 238000004079 fireproofing Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Landscapes
- Building Environments (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、コンクリート体、例えばコンクリート柱の
構築において、立設した柱主筋を覆って型枠ヲなし、コ
ア部へのコンクリート打設後は一体化した構造躯体を呈
する中空のプレキャストコンクリート体に関する。[Detailed Description of the Invention] (Industrial Application Field) This invention provides a method for constructing a concrete body, such as a concrete column, by forming a formwork to cover the erected column main reinforcement, and after pouring concrete into the core. It relates to a hollow precast concrete body exhibiting an integrated structural frame.
（従来の技術〉
近時、技術労働者の不足が著しいこともあって、ＲＣ構
造物に対し施工が簡便で省力化が図れるプレキャストコ
ンクリート部材の適用が盛んである。(Prior Art) In recent years, there has been a significant shortage of technical workers, and therefore precast concrete members, which are easy to construct and can save labor, are increasingly being applied to RC structures.
ここに、例えば特開昭５６−１２８８２７号や特開昭６
２−１９４９号などの公報に開示されているようなプレ
キャストコンクリート部材（中空なプレキャストコンク
リート柱部材〉の提案が様々なされている。これら中空
柱部材においては、施工途上における耐力（強度）、つ
まりコンクリート柱を構築する際、その中空コア部に打
設したコンクリートが固化してコンクリート柱としての
最終的な強度が得られるまでの施工途上における強度を
確保するため、強度および弾性が高く耐久性に優れた炭
素繊維などの繊維系部材による補強が施されている。そ
してコンクリート柱の構築においては、まず立設した柱
主筋を中空柱部材で讃い、次に中空コア部にコンクリー
トを後打ちすることにより、その中空柱部材が型枠を兼
ねて一体化された構造躯体を呈すこととなり、施工の合
理化が図られていた。Here, for example, JP-A-56-128827 and JP-A-6
Various proposals have been made for precast concrete members (hollow precast concrete column members) such as those disclosed in publications such as No. 2-1949. When constructing a column, the concrete poured into the hollow core solidifies to ensure strength during the construction process until the final strength of the concrete column is achieved. In constructing a concrete column, first the erected column main reinforcement is reinforced with hollow column members, and then concrete is poured into the hollow core. As a result, the hollow column members served as the formwork and formed an integrated structural frame, thereby streamlining the construction process.
（発明が解決しようとする課題）
しかしながら、補強に用いた繊維系部材は、耐久性に優
れるものの、耐火性に劣るという欠点があり、中空柱部
材の耐火性を損う不都合があった。(Problems to be Solved by the Invention) However, although the fiber-based member used for reinforcement has excellent durability, it has the disadvantage of being inferior in fire resistance, which has the disadvantage of impairing the fire resistance of the hollow column member.
そこで、耐火性に優れた鉄筋で補強すれば良いのではあ
るが、鉄筋の場合、錆の発生や中空部開口の広断面化あ
るいは中空柱部材の薄肉化を達成できないなどの不都合
があったために上述の繊維系部材に注目したのであって
、これを再び用いることは得策とは言い難い。Therefore, it would be better to use reinforcing steel with excellent fire resistance, but with reinforcing steel, there are disadvantages such as the formation of rust, the inability to widen the cross-section of the hollow opening, or to reduce the thickness of the hollow column member. Since we focused on the above-mentioned fiber-based member, it is hard to say that it is a good idea to use it again.
この発明は、上記のような背景に鑑みてなされたもので
あり、耐火性に優れると共に施工途上においても高強度
を示し、結果的にその部材厚を薄肉化できるプレキャス
トコンクリート体の提供をその目的とする。This invention was made in view of the above-mentioned background, and its purpose is to provide a precast concrete body that has excellent fire resistance and exhibits high strength even during construction, and as a result, the thickness of the member can be reduced. shall be.
（課題を解決するための手段）
上記目的を達成するためこの発明は、プレキャストコン
クリート製中空筒体の肉厚内に繊維材を埋設すると共に
、中空筒体の外周にこれを覆って耐火被覆部材を設けた
ことを特徴とする。(Means for Solving the Problems) In order to achieve the above object, the present invention embeds a fiber material within the wall thickness of a hollow cylinder made of precast concrete, and also covers the outer periphery of the hollow cylinder to form a fireproof covering member. It is characterized by having the following.
また本発明は、繊維材が、中空筒体を形成するコンクリ
ートに混入される短繊維材であることを特徴とする。Further, the present invention is characterized in that the fibrous material is a short fibrous material mixed into the concrete forming the hollow cylinder.
さらに本発明は、プレキャストコンクリート製中空筒体
の外周にこれを囲繞させて繊維材を配設すると共に、繊
維材の外側にこれを覆って耐火被覆部材を設けたことを
特徴とする。Furthermore, the present invention is characterized in that a fibrous material is provided around the outer periphery of the precast concrete hollow cylindrical body, and a fireproof covering member is provided on the outside of the fibrous material to cover this.
（作 用）
以上のように構成すると、中空筒体は繊維材によって補
強されることとなり、しかも外周が耐火被覆部材で覆わ
れる。これにより、優れた耐火性をも示すこととなる。(Function) With the above structure, the hollow cylinder is reinforced by the fiber material, and the outer periphery is covered with the fireproof covering member. This also results in excellent fire resistance.
（実 施 例）
以下この発明の実施例を、添付図面を参照しながら説明
する。(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
第１図及び第２図はそれぞれ、本発明に係るプレキャス
トコンクリート体を柱に適用した場合の好適な実施例を
示す斜視図である。FIGS. 1 and 2 are perspective views each showing a preferred embodiment in which a precast concrete body according to the present invention is applied to a column.
この発明は基本的には、プレキャストコンクリート製中
空筒体１の肉厚内に炭素繊維などの繊維材２を埋設する
と共に、中空筒体１の外周にこれを覆ってセラミックな
どの耐火被覆部材３を設けて構成される。This invention basically involves embedding a fibrous material 2 such as carbon fiber within the wall thickness of a hollow cylindrical body 1 made of precast concrete, and covering the outer periphery of the hollow cylindrical body 1 with a fireproof coating member 3 such as ceramic. It is configured by providing.
繊維材２は、中空筒体１を形成するコンクリートに混入
される短繊維材であっても良い。The fiber material 2 may be a short fiber material mixed into the concrete forming the hollow cylinder 1.
また、プレキャストコンクリート製中空筒体１の外周に
これを囲繞させて繊維材２を配設すると共に、繊維材２
の外側にこれを覆って耐火被覆部材３を設けて構成され
る。In addition, a fiber material 2 is disposed around the outer periphery of the precast concrete hollow cylinder 1, and the fiber material 2 is
A fireproof covering member 3 is provided on the outside of the fireproofing member 3 to cover the fireproof covering member 3.
筒体１は、好ましくは遠心成形などの方法で形成され、
本実施例では長手方向の上下両端が開口された円筒形状
とされており、その開口部分つまり中空部Ａには後述す
る中空コア部が造成される。The cylindrical body 1 is preferably formed by a method such as centrifugal molding,
In this embodiment, it has a cylindrical shape with openings at both upper and lower ends in the longitudinal direction, and a hollow core portion, which will be described later, is formed in the opening portion, that is, the hollow portion A.
繊維材２は、炭素繊維やアラミド繊維などの繊維素材か
ら成り、本実施例ではそうした繊維素材で所定ピッチの
網目状構造に構成されており、これは予めエポキシ樹脂
などの接着剤で接着して形成され、筒体１の壁内全周に
わたって埋設される。The fibrous material 2 is made of a fibrous material such as carbon fiber or aramid fiber, and in this embodiment, such a fibrous material is formed into a network structure with a predetermined pitch, which is bonded in advance with an adhesive such as an epoxy resin. It is formed and embedded all around the wall of the cylindrical body 1.
この繊維材２は、筒体１を補強するためのものであり、
第２図に示すように、筒体１と耐火被覆部材３との間に
介装しても良い。また、筒体１を形成するコンクリート
に短繊維材を混入することにより、筒体１の肉厚内に繊
維材２を埋設するようにしても良く、この場合筒体１は
、いわゆる繊維強化コンクリート（ＦＲＣ）で形成され
ることとなる。This fiber material 2 is for reinforcing the cylinder 1,
As shown in FIG. 2, it may be interposed between the cylindrical body 1 and the fireproof covering member 3. Furthermore, the fiber material 2 may be embedded within the wall thickness of the cylinder 1 by mixing short fiber material into the concrete forming the cylinder 1. In this case, the cylinder 1 is made of so-called fiber reinforced concrete. (FRC).
耐火被覆部材３は、セラミックやケイカルあるいは石膏
などの耐火素材から成り、筒体１の外周に配設される。The fireproof coating member 3 is made of a fireproof material such as ceramic, silica, or gypsum, and is disposed around the outer periphery of the cylindrical body 1.
遠心成形法によって筒体１を形成する場合には、回転さ
れる成形型枠の内面に耐火被覆部材３を予め配設してお
き、この状態で型枠を回転させつつ順次コンクリートを
型枠内に投入して製造することになる。When forming the cylindrical body 1 by the centrifugal forming method, the fireproof coating member 3 is placed in advance on the inner surface of the rotating forming form, and in this state, concrete is sequentially poured into the form while rotating the form. will be invested in and manufactured.
ところでこのような構成によれば、繊維材２が筒体ｌの
壁内に埋設（第１ｖｌＪ）、あるいは筒体１と耐火被覆
部材３との間に介装（第２図）または図示省略したがコ
ンクリートへの混入により筒体１内に埋設されるので、
コンクリート製の筒体１はその繊維材２によって補強さ
れることとなり、しかもその外周を耐火被覆部材３で覆
われる。このため耐火性に優れることとなり、強度的に
も高いものが得られる。そして、鉄筋による補強ではな
いので薄肉な構造とでき、軽量化も図れる。By the way, according to such a configuration, the fiber material 2 is embedded in the wall of the cylinder l (1st vlJ), or interposed between the cylinder 1 and the fireproof covering member 3 (Fig. 2), or the fiber material 2 is not shown in the figure. is mixed into the concrete and buried inside the cylinder 1, so
The concrete cylindrical body 1 is reinforced by the fiber material 2, and its outer periphery is covered with a fireproof covering member 3. Therefore, it has excellent fire resistance and high strength. Additionally, since it is not reinforced with reinforcing bars, it can be made thinner and lighter in weight.
第２図はさらに、鉄筋コンクリート柱を構築した施工例
を示している。Figure 2 further shows a construction example in which reinforced concrete columns were constructed.
この第２図は、前述したように繊維材２が筒体１と耐火
被覆部材３との間に介装される他は第１図に示す実施例
と同様である。中空筒体１の中空コア部６には柱主筋４
が立設され、鉄筋コンクリート柱としての配筋が施され
る。そして次に筒体１の上端開口からコンクリート５を
打設してコア部６の遺戒を行う。これにより本発明のプ
レキャストコンクリート体はＲＣ柱として、コンクリー
ト打設の型忰を兼ねて社主筋４等コア部６と一体化した
構造躯体を呈すととなり、この筒体１は構築後剪断補強
材として機能することとなる。従って、フープ筋等の配
設を省略することもできる。The embodiment shown in FIG. 2 is similar to the embodiment shown in FIG. 1 except that the fiber material 2 is interposed between the cylinder 1 and the fireproof covering member 3 as described above. The hollow core part 6 of the hollow cylindrical body 1 has column main reinforcement 4.
will be erected and reinforced as reinforced concrete columns. Next, concrete 5 is poured from the upper end opening of the cylinder 1 and the core portion 6 is sealed. As a result, the precast concrete body of the present invention, as an RC column, has a structural frame integrated with the core part 6 of the main reinforcement 4 etc., which also serves as a mold for concrete pouring. It will function as a. Therefore, it is also possible to omit the provision of hoop lines and the like.
なお、筒体１の壁厚は、その中空コア部６へのコンクリ
ート打設に伴う側圧に充分耐えられる捏度に設定されて
おり、繊維材２による補強が施されるので、薄肉化が達
成されている。Note that the wall thickness of the cylinder 1 is set to a degree of kneading that can sufficiently withstand the lateral pressure associated with pouring concrete into the hollow core portion 6, and is reinforced with the fiber material 2, so that thinning is achieved. has been done.
上記実施例では、本プレキャストコンクリート体を柱と
して使用する場合について説明したが、その他の構造材
に採用しても良いことは勿論である。In the above embodiment, a case has been described in which the present precast concrete body is used as a column, but it goes without saying that it may be employed in other structural materials.
（発明の効果）
以上実施例で詳細に説明したように、この発明に係るプ
レキャストコンクリート体によれば、中空筒体が繊維材
によって補強されると共に、外周が耐火被覆部材で覆わ
れるので、優れた耐火性を示すこととなる。(Effects of the Invention) As explained in detail in the embodiments above, the precast concrete body according to the present invention is superior in that the hollow cylinder is reinforced with a fiber material and the outer periphery is covered with a fireproof covering member. This means that it exhibits excellent fire resistance.
第１図及び第２図はそれぞれ、本発明に係るプレキャス
トコンクリート体を柱に適用した場合の好適な実施例を
示す斜視図である。
１・・・・・・・・・プレキャストコンクリート製中空
筒体２・・・・・・・・・繊維材
３・・・・・・・・・耐火被覆部材FIGS. 1 and 2 are perspective views each showing a preferred embodiment in which a precast concrete body according to the present invention is applied to a column. 1... Precast concrete hollow cylindrical body 2... Fibrous material 3... Fireproof coating member
Claims (3)
繊維材を埋設すると共に、該中空筒体の外周にこれを覆
って耐火被覆部材を設けたことを特徴とするプレキャス
トコンクリート体。(1) A precast concrete body characterized in that a fibrous material is embedded within the thickness of a hollow cylindrical body made of precast concrete, and a fireproof covering member is provided on the outer periphery of the hollow cylindrical body.
ートに混入される短繊維材である請求項１に記載のプレ
キャストコンクリート体。(2) The precast concrete body according to claim 1, wherein the fiber material is a short fiber material mixed into the concrete forming the hollow cylinder.
れを囲繞させて繊維材を配設すると共に、該繊維材の外
側にこれを覆って耐火被覆部材を設けたことを特徴とす
るプレキャストコンクリート体。(3) A precast concrete body, characterized in that a fibrous material is disposed around the outer periphery of a hollow cylindrical body made of precast concrete, and a fireproof covering member is provided on the outside of the fibrous material to cover it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1336467A JPH07111081B2 (en) | 1989-12-27 | 1989-12-27 | Hollow cylindrical precast concrete body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1336467A JPH07111081B2 (en) | 1989-12-27 | 1989-12-27 | Hollow cylindrical precast concrete body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03199561A true JPH03199561A (en) | 1991-08-30 |
| JPH07111081B2 JPH07111081B2 (en) | 1995-11-29 |
Family
ID=18299443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1336467A Expired - Lifetime JPH07111081B2 (en) | 1989-12-27 | 1989-12-27 | Hollow cylindrical precast concrete body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07111081B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012237162A (en) * | 2011-05-13 | 2012-12-06 | Kajima Corp | Column structure and construction method of column structure |
| JP2021173016A (en) * | 2020-04-22 | 2021-11-01 | 中国電力株式会社 | Fiber-reinforced resin-reinforced concrete material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59106655A (en) * | 1982-12-10 | 1984-06-20 | 大日コンクリ−ト工業株式会社 | Simulated wood pillar and production thereof |
| JPS6092544A (en) * | 1983-10-24 | 1985-05-24 | 日本セメント株式会社 | Construction of reinforced concrete column |
| JPS637907A (en) * | 1986-06-30 | 1988-01-13 | 三井建設株式会社 | Manufacture of short-fiber reinforced centrifugal molding concrete structural member |
-
1989
- 1989-12-27 JP JP1336467A patent/JPH07111081B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59106655A (en) * | 1982-12-10 | 1984-06-20 | 大日コンクリ−ト工業株式会社 | Simulated wood pillar and production thereof |
| JPS6092544A (en) * | 1983-10-24 | 1985-05-24 | 日本セメント株式会社 | Construction of reinforced concrete column |
| JPS637907A (en) * | 1986-06-30 | 1988-01-13 | 三井建設株式会社 | Manufacture of short-fiber reinforced centrifugal molding concrete structural member |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012237162A (en) * | 2011-05-13 | 2012-12-06 | Kajima Corp | Column structure and construction method of column structure |
| JP2021173016A (en) * | 2020-04-22 | 2021-11-01 | 中国電力株式会社 | Fiber-reinforced resin-reinforced concrete material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07111081B2 (en) | 1995-11-29 |
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