JPH0652003B2 - Construction method of RC wall opening - Google Patents
Construction method of RC wall openingInfo
- Publication number
- JPH0652003B2 JPH0652003B2 JP31106687A JP31106687A JPH0652003B2 JP H0652003 B2 JPH0652003 B2 JP H0652003B2 JP 31106687 A JP31106687 A JP 31106687A JP 31106687 A JP31106687 A JP 31106687A JP H0652003 B2 JPH0652003 B2 JP H0652003B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- wall
- fiber woven
- adhesive
- wall opening
- 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
Landscapes
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Reinforcement Elements For Buildings (AREA)
Description
【発明の詳細な説明】 《産業上の利用分野》 本発明は鉄筋コンクリート(RC)壁開口部の隅角位置
に発生するひび割れを抑制できるRC壁開口部の施工方
法に関する。Description: TECHNICAL FIELD The present invention relates to a method for constructing an RC wall opening capable of suppressing cracks occurring at corner positions of a reinforced concrete (RC) wall opening.
《従来の技術》 鉄筋コンクリート外壁のひび割れは雨水による漏水の原
因になるほか、このひび割れが仕上げ材まで及べば美観
の観点からも大きな障害になるのである。したがって、
コンクリート打設後の脱型時に知り得るひび割れが0.
2mm〜0.3mm程度の大きな割れであれば、ひび割れに
樹脂注入を行い、その他の目立たないものについてはモ
ルタル系材料の塗布によるモルタルシールを行ってい
た。<Conventional technology> Cracks on the outer wall of reinforced concrete cause water leakage due to rainwater, and if this crack reaches the finishing material, it will be a major obstacle from the viewpoint of aesthetics. Therefore,
The cracks that can be known when demolding after placing concrete is 0.
For large cracks of about 2 mm to 0.3 mm, resin was injected into the cracks, and for other inconspicuous ones, mortar sealing was performed by applying a mortar-based material.
《発明が解決しようとする問題点》 しかし、ひび割れに樹脂を注入する補修方法では施工々
程に多くを要する割には効果が不完全で、隣接部分が再
びひび割れする場合が多く、またモルタルでシールする
簡易な方法では同一箇所に再度ひび割れを生じる場合が
多かった。<Problems to be solved by the invention> However, the repair method of injecting resin into cracks is incomplete in effect despite the fact that it takes a lot of time for each construction, and in many cases adjoining parts often crack again, and with mortar The simple method of sealing often caused cracks to occur again at the same location.
特に、コンクリート打設直後の暫時の期間は乾燥収縮が
激しく、外壁の場合には大気の温湿度変化も作用し、初
期クラックの成長(拡大)を伴う。このような成長性ク
ラックに対し、従来の補修方法だけでは充分に対応でき
なかった。In particular, during the temporary period immediately after the concrete is poured, the drying shrinkage is severe, and in the case of the outer wall, the temperature and humidity changes of the atmosphere also act and the initial crack grows (expands). Such a growth crack cannot be sufficiently dealt with by the conventional repair method.
本発明は上記事情に鑑みてなされたものであって、その
目的は外壁を形成するコンクリート打ち込みの段階から
ひび割れの発生しやすい部位、即ち壁開口の隅角部を低
廉かつ簡易に補強してひび割れを抑制するRC壁開口部
の施工方法を提供するにある。The present invention has been made in view of the above circumstances, and an object thereof is to easily and inexpensively reinforce a portion where cracks are likely to occur from a concrete driving step for forming an outer wall, that is, a corner portion of a wall opening. There is a method of constructing an RC wall opening that suppresses
《問題点を解決するための手段》 上記目的を達成するために、本発明に係るRC壁開口部
の施工方法は、壁型枠において、予め開口部の隅角に位
置する堰板面の隅角部対応部分に不錆性高性能繊維織布
を両面粘着テープで部分付けし、次いで該不錆性高性能
繊維織布にコンクリートとの接着性が良好な水による反
応性一次元高分子接着剤を塗布し、然る後に該型枠を建
て込んでコンクリートを打設し、該打設コンクリートが
所要強度発現後型枠を脱型するものである。<< Means for Solving Problems >> In order to achieve the above object, a method for constructing an RC wall opening according to the present invention is a wall formwork, in which a corner of a dam plate surface located at a corner of the opening in advance is used. A non-corrosive high-performance fiber woven fabric is partially attached to the corner-corresponding parts with double-sided adhesive tape, and then the non-rust high-performance fiber woven fabric has good adhesion to concrete. The agent is applied, and after that, the mold is built up and concrete is poured, and the mold is demolded after the required strength is achieved.
《作用》 両面粘着テープで堰板面に不錆性高性能繊維織布を仮止
めし、コンクリート打設時には生コンクリート中の水分
と不錆性高性能繊維織布に塗布してある接着剤とが反応
する。そして、漸次にコンクリートが硬化するに伴って
表面が乾燥するのに合せ、上記接着剤は強固な接着力を
発揮する。即ち、この接着剤はコンクリートと不錆性高
性能繊維とを被着体とするバインダーであって、型枠脱
型時にはコンクリートに不錆性高性能繊維が一体化し、
型枠は不錆性高性能繊維から離れる。粘着テープは型枠
または不錆性高性能繊維側に粘着しており、適宜に後か
ら剥離する。《Action》 Temporarily fix the rust-proof high-performance fiber woven cloth on the dam plate surface with double-sided adhesive tape, and use the adhesive applied to the moisture in the fresh concrete and the rust-proof high-performance fiber woven cloth when placing concrete. Reacts. Then, as the concrete gradually hardens and the surface thereof dries, the adhesive exhibits a strong adhesive force. That is, this adhesive is a binder having concrete and an antirust high performance fiber as an adherend, and when the mold is demolded, the antirust high performance fiber is integrated into the concrete,
The formwork separates from the rustproof high performance fiber. The adhesive tape adheres to the mold or the non-rusting high-performance fiber side, and is peeled off later as appropriate.
不錆性高性能繊維がコンクリートと完全に一体化してコ
ンクリートの挙動を強制的に拘束し、ひび割れの成長を
抑制する。尚、この発明で用いる不錆性高性能繊維織布
とは、炭素繊維、アラミド繊維、ポリエチレン繊維等の
織布をいう。The rust-proof high-performance fiber is completely integrated with the concrete to forcibly restrain the behavior of the concrete and suppress the growth of cracks. The rustproof high-performance fiber woven fabric used in the present invention refers to a woven fabric of carbon fiber, aramid fiber, polyethylene fiber or the like.
《実施例》 以下、本発明の好適な実施例について図面を参照にして
詳細に説明する。<Example> Hereinafter, a preferred example of the present invention will be described in detail with reference to the drawings.
先ず壁型枠1を建て込む前に、その堰坂2の内側開口隅
角部相当位置に幅50cm程度のシート状に形成した炭素
繊維織布3を両面粘着テープ4で部分的に仮止めする。
次いで、仮止めした炭素繊維織布3に接着剤5としてエ
チレン酢酸ビニル樹脂エマルジョン(E・V・A)を塗
布する。これは例えば商品名NS−ハイフレックス(日
本化成)があり、その3倍液を使用してもよい。First, before building the wall form 1, the carbon fiber woven fabric 3 formed in a sheet shape with a width of about 50 cm is temporarily temporarily fixed to the position corresponding to the inner opening corner of the weir slope 2 with the double-sided adhesive tape 4. .
Next, the ethylene vinyl acetate resin emulsion (EVA) as the adhesive 5 is applied to the temporarily fixed carbon fiber woven fabric 3. This has, for example, the trade name NS-Hiflex (Nippon Kasei), and a triple solution thereof may be used.
然る後、堰板2を所定の位置に建て込み、その外側に端
太材6をセットする。型枠1の建て込み状態は第2図の
ようになる。図では片方の堰板2の方にだけ炭素繊維織
布3を設けているが、相対向する各堰板2−2の内側に
設けてもよい。そして、コンクリート7を打ち込み、そ
のまま養生すると、コンクリート7の側圧を受けながら
生コンクリート中の水分に接着剤5が反応し、膨潤しつ
つコンクリート7の硬化と相俟って再硬化する。After that, the barrier plate 2 is built in a predetermined position, and the thick piece 6 is set on the outside thereof. The built-in state of the mold 1 is as shown in FIG. Although the carbon fiber woven fabric 3 is provided only on one of the dam plates 2 in the drawing, it may be provided inside each of the dam plates 2-2 facing each other. Then, when the concrete 7 is poured and cured as it is, the adhesive 5 reacts with the moisture in the fresh concrete while receiving the lateral pressure of the concrete 7, and swells and is re-hardened in combination with the hardening of the concrete 7.
その際、通気性があるため、コンクリート中の水分移動
を妨げず従って剥れる恐れも無い。即ち、生コン打ち込
み後に生コン中の水分と反応し、強固な接着力を発揮し
ながら堰板2の脱型後は自然にコンクリートと一体化す
るのである。At that time, since it has air permeability, it does not hinder the movement of water in the concrete, and therefore there is no fear of peeling. That is, it reacts with the water in the ready-mixed concrete after being poured into the ready-mixed concrete, and while it exerts a strong adhesive force, it naturally integrates with the concrete after the mold plate 2 is released from the mold.
型枠1を脱型すると、壁8の開口部9隅角位置に炭素繊
維織布3が壁8と一体化して残る。炭素繊維織布3は既
にE・V・A接着剤5によってコンクリート7と強固に
バインドされているからである。脱型後は乾燥によって
更に強固に一体化し、コンクリート7の乾燥収縮に伴う
ひび割れ応力を炭素繊維織布3に伝え、ひび割れを抑止
拘束する。When the mold 1 is released from the mold, the carbon fiber woven fabric 3 is left integrally with the wall 8 at the corners of the opening 9 of the wall 8. This is because the carbon fiber woven cloth 3 has already been firmly bound to the concrete 7 by the EV adhesive. After the mold is removed, it is more firmly integrated by drying, and the crack stress due to the drying shrinkage of the concrete 7 is transmitted to the carbon fiber woven fabric 3 to suppress and restrain the crack.
炭素繊維織布3の厚さは、構造体コンクリートと同程度
の引張強度を持つよう、壁厚×コンクリート引張強度
(15kg/cm2程度)/炭素繊維引張強度(20000k
g/cm2程度)の関係から求める。The thickness of the carbon fiber woven cloth 3 is such that the wall strength × concrete tensile strength (about 15 kg / cm 2 ) / carbon fiber tensile strength (20,000 k) so that the same tensile strength as the structural concrete is obtained.
g / cm 2 ).
例えば壁8の厚さを20cmとすると、炭素繊維織布3の
厚みは0,15mmとなる。壁8の片面だけでなく、表裏
面に貼着するとすれば、0,15mmの半分の厚さで足り
ることになる。For example, when the wall 8 has a thickness of 20 cm, the carbon fiber woven fabric 3 has a thickness of 0.15 mm. If it is attached not only to one side of the wall 8 but also to the front and back sides, a half thickness of 0,15 mm will suffice.
したがって、これにE・V・A接着剤5を塗布しても非
常に薄くて軽いため、テープ4で簡単に堰板2に仮止め
しておくことが可能であり、また、薄いためにコンクリ
ート打設時の施工性には何等悪影響を与えない。Therefore, even if the E / V / A adhesive 5 is applied to it, it is very thin and light, so it is possible to easily temporarily fix it to the dam plate 2 with the tape 4, and because it is thin, the concrete There is no adverse effect on the workability during placement.
尚、炭素繊維織布3はE・V・A接着剤の性質上、壁8
の室内側に設けるのがよい。壁8の両面に貼着するとき
には、壁8の外表面(外側)には防水塗膜を張るとよ
い。The carbon fiber woven fabric 3 has a wall 8 due to the nature of the EV adhesive.
It is better to install it inside the room. When sticking to both sides of the wall 8, it is advisable to put a waterproof coating on the outer surface (outside) of the wall 8.
《効果》 以上詳しく述べたように、本発明に係るRC壁開口部の
施工方法は脱型時に剥れるように型枠の内側に粘着テー
プで不錆性高性能繊維織布を仮止めしておいて、これを
水反応性一次元高分子接着剤で打設コンクリートに反応
一体化させるので、接着面の表面処理作業を要しない。
更に不錆性高性能繊維織布は鋏で簡単に裁断して任意の
寸法にすることが容易であり、引張強度が著しく高い故
に薄くても所要の強度を得るからコンクリート打設時の
障害や不具合も生ぜず施工性に優れる。また、ひび割れ
を充分に抑制するので、開口部に配する鉄筋を念入りに
施工する必要がなく、コンクリートとの付着状況や打設
密度を充分に確実なものとし、鉄筋の配筋施工の負担を
軽くすると同時に不錆性高性能繊維による補強作業も簡
潔で、後からのひび割れ補修作業が無くなるなど極めて
効果的である。<Effect> As described in detail above, in the method for constructing the RC wall opening according to the present invention, the non-corrosive high-performance fiber woven fabric is temporarily fixed to the inside of the mold with an adhesive tape so that the RC wall opening is peeled off at the time of demolding. In this case, since the water-reactive one-dimensional polymer adhesive is reactively integrated with the cast concrete, the surface treatment work of the adhesive surface is not required.
Furthermore, the rust-resistant high-performance fiber woven fabric can be easily cut with scissors to any desired size, and since it has a remarkably high tensile strength, it can obtain the required strength even if it is thin, so that there is no obstacle to concrete placement. Excellent workability with no defects. In addition, since cracks are sufficiently suppressed, it is not necessary to carefully construct the reinforcing bars to be placed in the openings, and the adhesion status with concrete and the placement density can be ensured sufficiently to reduce the burden of reinforcing bar reinforcement construction. It is light and at the same time simple to reinforce with anti-corrosive high-performance fiber, which is extremely effective as it eliminates the need for subsequent crack repair work.
【図面の簡単な説明】 第1図は型枠に炭素繊維織布を仮止めした状態を示す断
面図、第2図はコンクリートを打設したときの端面図、
第3図は型枠を脱型した後の壁開口部を示す斜視図であ
る。 1……型枠、2……堰板 3……炭素繊維織布、4……両面粘着テープ 5……接着剤、6……端太材 7……コンクリート、8……壁 9……開口部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a state in which carbon fiber woven cloth is temporarily fixed to a formwork, and FIG. 2 is an end view when concrete is placed,
FIG. 3 is a perspective view showing the wall opening after the mold is demolded. 1 ... Formwork, 2 ... Dam plate 3 ... Carbon fiber woven cloth, 4 ... Double-sided adhesive tape 5 ... Adhesive, 6 ... Edge material 7 ... Concrete, 8 ... Wall 9 ... Opening Department
フロントページの続き (56)参考文献 特開 昭61−266760(JP,A) 特開 昭58−131270(JP,A) 特開 昭60−5750(JP,A)Front page continuation (56) Reference JP 61-266760 (JP, A) JP 58-131270 (JP, A) JP 60-5750 (JP, A)
Claims (2)
する堰板面の隅角部対応部分に不錆性高性能繊維織布を
両面粘着テープで部分付けし、次いで該不錆性高性能繊
維織布にコンクリートとの接着性が良好な水による反応
性一次元高分子接着剤を塗布し、然る後に該型枠を建て
込んでコンクリートを打設し、該打設コンクリートが所
要強度発現後型枠を脱型するRC壁開口部の施工方法。1. A wall formwork, wherein a non-corrosive high-performance fiber woven fabric is partially attached to a corner-corresponding portion of a dam plate surface located at a corner of an opening in advance with a double-sided adhesive tape, and then the rust-proof. High-performance fiber woven cloth is coated with a water-reactive one-dimensional polymer adhesive with good adhesion to concrete, and after that, the formwork is installed and concrete is poured. A method for constructing an RC wall opening in which the mold is demolded after the required strength is developed.
ルジョンである特許請求の範囲第1項記載のRC壁開口
部の施工方法。2. The method for constructing an RC wall opening according to claim 1, wherein the adhesive is an ethylene vinyl acetate resin emulsion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31106687A JPH0652003B2 (en) | 1987-12-10 | 1987-12-10 | Construction method of RC wall opening |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31106687A JPH0652003B2 (en) | 1987-12-10 | 1987-12-10 | Construction method of RC wall opening |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01154945A JPH01154945A (en) | 1989-06-16 |
JPH0652003B2 true JPH0652003B2 (en) | 1994-07-06 |
Family
ID=18012706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31106687A Expired - Lifetime JPH0652003B2 (en) | 1987-12-10 | 1987-12-10 | Construction method of RC wall opening |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0652003B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6839933B2 (en) * | 2016-06-01 | 2021-03-10 | 太平洋マテリアル株式会社 | Manufacturing method of concrete structure |
-
1987
- 1987-12-10 JP JP31106687A patent/JPH0652003B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH01154945A (en) | 1989-06-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0652003B2 (en) | Construction method of RC wall opening | |
JP5877271B1 (en) | Method for manufacturing concrete structure | |
JP3047799B2 (en) | Concrete curing method | |
JPH01111961A (en) | Method of curing concrete | |
JP3695002B2 (en) | Curing method for concrete body | |
JP3452407B2 (en) | Concrete surface hardening delay tape or sheet | |
JP3285192B2 (en) | Treatment agent for concrete joint surface | |
JPH08135031A (en) | Concrete close contact water stop material | |
JPH07279413A (en) | Form for placing concrete and sheet for sticking on form | |
JP2002088937A (en) | Water-stop compound material and lath net | |
JPH11350617A (en) | Joint structure between large decorative plate for precast concrete composite panel | |
JP2861783B2 (en) | Formwork for concrete casting and sheet for attaching formwork | |
JPH05112993A (en) | Construction of concrete building | |
KR100209319B1 (en) | Mortar backing sheet | |
JP2849336B2 (en) | Underground outer wall waterproof structure and construction method | |
JP2003033904A (en) | Joint filler and method for tile work, and manufacturing method for concrete panel | |
JP3065417B2 (en) | Interior and exterior finishing method for buildings | |
EP2540934B1 (en) | A covering for formwork for concrete castings | |
JP2006152605A (en) | Photocurable prepreg sheet and heat-insulating and waterproof construction method using it | |
JP3007528B2 (en) | Construction method of exposed concrete structure | |
JP2585387Y2 (en) | Insulation formwork for concrete wall | |
JP2800574B2 (en) | Board material | |
JP3343681B2 (en) | Structural slitting device | |
JPH01250560A (en) | Composite as additional material to concrete panel | |
JP2002256674A (en) | Finishing backing sheet and wall construction method |