JPH0613165B2 - Protective film for concrete structure and its formation method - Google Patents

Protective film for concrete structure and its formation method

Info

Publication number
JPH0613165B2
JPH0613165B2 JP30136189A JP30136189A JPH0613165B2 JP H0613165 B2 JPH0613165 B2 JP H0613165B2 JP 30136189 A JP30136189 A JP 30136189A JP 30136189 A JP30136189 A JP 30136189A JP H0613165 B2 JPH0613165 B2 JP H0613165B2
Authority
JP
Japan
Prior art keywords
protective film
concrete
adhesive
concrete structure
film
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
Application number
JP30136189A
Other languages
Japanese (ja)
Other versions
JPH03161301A (en
Inventor
昇 栗原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daito KK
Original Assignee
Daito KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daito KK filed Critical Daito KK
Priority to JP30136189A priority Critical patent/JPH0613165B2/en
Publication of JPH03161301A publication Critical patent/JPH03161301A/en
Publication of JPH0613165B2 publication Critical patent/JPH0613165B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Producing Shaped Articles From Materials (AREA)

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、コンクリート構築物のコンクリートや内部の
鉄筋を保護する保護膜とその形成方法に関する。
TECHNICAL FIELD The present invention relates to a protective film for protecting concrete of a concrete structure and internal reinforcing bars, and a method for forming the same.

[従来の技術] コンクリート構築物は、通常外側に型枠を組んで内部に
補強用の鉄筋を配置した後、型枠内にコンクリートを流
し込んで製造される。コンクリートは、圧縮荷重に強
く、しかも内部の鉄筋が引っ張り及び曲げ荷重を負担す
るので、外力に対してはかなりの強度を発揮する反面、
天候による温度差、雨水、海水等に対する強度は不充分
で、特に湾岸や海中構築物の場合に耐久性の低下が著し
い。
[Prior Art] A concrete structure is usually manufactured by forming a mold on the outside and arranging reinforcing bars inside, and then pouring the concrete into the mold. Concrete is strong against compressive load, and since internal reinforcing bars bear tensile and bending loads, it exhibits considerable strength against external forces, but
The strength against temperature difference, rainwater, seawater, etc. due to the weather is insufficient, and the durability is remarkably reduced especially in the case of a bay or an underwater structure.

耐久性低下の最大の原因は、コンクリートの多孔性にあ
り、表面からの水分がここから浸透して内部の鉄筋を腐
食させるのである。一方、コンクリートはアルカリ性で
あるから、本来であれば鉄筋の酸化腐食は抑制されるは
ずであるが、コンクリート内に水分が浸透すると空気中
の炭酸ガスがコンクリートを中和させるため、前述の防
食作用が大幅に低下する。
The main cause of the decrease in durability is the porosity of concrete, from which water from the surface penetrates and corrodes the internal reinforcing bars. On the other hand, since concrete is alkaline, oxidative corrosion of reinforcing bars should be suppressed, but when water penetrates into the concrete, carbon dioxide in the air neutralizes the concrete, so Is significantly reduced.

また、寒冷地にあっては、コンクリートに浸透した水分
が凍結してコンクリートを損傷させる原因となってお
り、更に湾岸や海中構築物にあっては、前述の天候以外
にも潮風、波しぶき、海水の影響を受けるので、これら
がコンクリートや鉄筋の腐食を一層促進させる。
In cold regions, the water that permeates the concrete freezes and causes damage to the concrete. These further accelerate corrosion of concrete and rebar.

これを防止するため、特公昭63−12968号の発明
では、型枠内面に耐食性の保護剤を塗布してから、コン
クリートを流し込み、固化したコンクリートの表面に保
護膜を形成している。
In order to prevent this, in the invention of Japanese Examined Patent Publication No. 63-12968, a corrosion-resistant protective agent is applied to the inner surface of the mold, and then concrete is poured in to form a protective film on the surface of the solidified concrete.

[発明が解決しようとする課題] しかし、前述の保護膜にあっては、コンクリートに対す
る保護膜の固着力が充分とはいえず、単純に強固な接着
剤を使用すれな今度は脆くなって地震等の振動で保護膜
が剥がれるおそれがある。また、保護膜を予め長く形成
してもその剛性が高いので巻いて貯蔵、運搬することが
できない。
[Problems to be Solved by the Invention] However, with the above-mentioned protective film, the adhesion of the protective film to concrete cannot be said to be sufficient, and if a strong adhesive is not simply used, it will become brittle and the earthquake will occur. The vibration may cause the protective film to peel off. Further, even if the protective film is formed long in advance, it cannot be rolled and stored or transported because of its high rigidity.

本発明は、かかる事情に鑑みてなされたものであり、そ
の目的は、使用前は予め巻いて運搬することができ、使
用後は密着力が高く、しかも振動に柔軟に対応できるコ
ンクリート構築物の保護膜とその形成方法を提供するこ
とにある。
The present invention has been made in view of the above circumstances, and an object thereof is to protect a concrete structure that can be wound in advance and transported before use, has high adhesion after use, and can flexibly cope with vibration. A film and a method for forming the film are provided.

[課題を解決するための手段] 上記目的を達成するため、請求項(1)の保護膜は、耐食
性を有する軟質シートの片面に弾性接着剤で水硬化性接
着剤を貼り付け、その表面を可剥性のフィルムで被覆し
てある。
[Means for Solving the Problems] In order to achieve the above-mentioned object, the protective film of claim (1) is such that a water-curable adhesive is attached to one surface of a soft sheet having corrosion resistance with an elastic adhesive and the surface thereof is It is covered with a peelable film.

また、請求項(2)の保護膜形成方法では、前記保護膜の
フィルムを剥がした状態で型枠の内側へ仮止めし、次い
で型枠の内部にコンクリートを流し込んで固化させ、最
後に型枠を外している。
Further, in the method for forming a protective film according to claim (2), the film of the protective film is peeled off, and temporarily fixed to the inside of the mold, and then concrete is poured into the inside of the mold to be solidified, and finally the mold is formed. Is removed.

[作用] 請求項(1)の構成により、シート及び各接着剤は柔軟性
を有しているので、予め保護膜を形成して巻いておけば
貯蔵や運搬に便利であり、保護膜の表面がフィルムで覆
われているから、水硬化性接着剤が空気中の水分と反応
することもない。
[Operation] According to the configuration of claim (1), since the sheet and each adhesive have flexibility, it is convenient for storage and transportation if a protective film is formed in advance and wound, and the surface of the protective film. Since the film is covered with a film, the water-curable adhesive does not react with moisture in the air.

請求項(2)の構成により、シート内面の水硬化性接着剤
がコンクリートと水和反応を起こしてシートとコンクリ
ートの密着力が大きくなり、地震や衝撃で構築物が揺れ
ても弾性接着剤がこれらを吸収しながら追従するので、
クラックの発生や保護膜の剥離が防止される。
According to the constitution of claim (2), the water-curable adhesive on the inner surface of the sheet causes a hydration reaction with the concrete to increase the adhesive force between the sheet and the concrete, and the elastic adhesive is used even if the structure shakes due to an earthquake or shock. As it follows while absorbing
Generation of cracks and peeling of the protective film are prevented.

[実施例] 第1図及び第2図には、本発明に係る保護膜1の斜視図
及び拡大断面図が示されており、この保護膜1は、耐食
性の軟質シート2の片面にに弾性接着剤3aで水硬化性
接着剤3bを貼り付け、その表面を可剥性のフィルム4
により被覆して構成されている。
EXAMPLE FIG. 1 and FIG. 2 show a perspective view and an enlarged sectional view of a protective film 1 according to the present invention. The protective film 1 is elastic on one surface of a corrosion-resistant soft sheet 2. The water-curable adhesive 3b is attached with the adhesive 3a, and the surface thereof is a peelable film 4
It is constituted by coating with.

軟質シート2は、FRP製で長く形成した保護膜1を巻
き付けられる程度の柔軟性を持たせるのが望ましい。弾
性接着剤3aは、シート2に水硬化性接着剤3bを結合す
るバインダーで既に市販されているものである。これは
硬化後もゴムのように弾性力を有し、振動や衝撃を吸収
すると共にシート2を巻いても追従可能な接着剤であ
る。
The soft sheet 2 is preferably made of FRP and has flexibility enough to wind the protective film 1 formed long. The elastic adhesive 3a is a binder that bonds the water-curable adhesive 3b to the sheet 2 and is already commercially available. This is an adhesive that has elasticity like rubber even after curing, absorbs vibrations and shocks, and can follow the sheet 2 even when wound.

水硬化性接着剤3bは、水和反応により硬化接着する材
料で、この実施例では、直径1mm程度のセメント系粒状
接着剤を用いている。表面のフィルム4は、接着剤3b
が空気中の水分と反応するのを防止するもので、手で剥
がし易いタイプを用いるのが望ましい。
The water-curable adhesive 3b is a material that is hardened and bonded by a hydration reaction, and in this embodiment, a cement-based granular adhesive having a diameter of about 1 mm is used. The film 4 on the surface is the adhesive 3b
It is preferable to use a type that can be easily peeled off by hand because it prevents the reaction with water in the air.

次に第3図及び第4図(A),(B)に従って桟橋の支柱5
をコンクリート被覆する場合を説明する。
Next, according to FIGS. 3 and 4 (A) and (B), the pier supports 5
The case of coating with concrete will be described.

桟橋は、支柱5の上にコンクリート6を形成して構築さ
れ、金属製の支柱5は、干満域及び飛沫域が集中的に腐
食し易いのでこの部分もコンクリート被覆される。コン
クリートの打設にあたっては、まず型枠7の足場となる
受台8が支柱5の周囲に取り付けられ、支柱5の外側に
ボルトスタッド等の鉄筋9が溶接される。次いで木板等
の型枠7を複数組み合わせて支柱5の周囲を角筒状に被
覆し、型枠7の下端を受台8で支持する。
The pier is constructed by forming concrete 6 on the stanchions 5, and the metal stanchions 5 are likely to be corroded intensively in the tidal and splash areas, so that this area is also covered with concrete. In pouring concrete, first, a pedestal 8 that serves as a scaffold for the formwork 7 is attached around the column 5, and a reinforcing bar 9 such as a bolt stud is welded to the outside of the column 5. Next, a plurality of molds 7 such as wooden boards are combined to cover the periphery of the column 5 in a rectangular tube shape, and the lower end of the mold 7 is supported by the pedestal 8.

次に前述の保護膜1を引き出して所定長さに切断し、表
面のフィルム4を剥してから第4図(A)に示すように接
着剤10で型枠7の内側に仮止めする。続いて型枠7と
支柱5との間にコンクリート11を流して固化させ、所
定時間養生させる。この間に水硬化性接着剤3bは、コ
ンクリート11の水分と反応して硬化するので、保護膜
1とコンクリート11が強固に密着する。最後に型枠7
を外すとコンクリート側の固着力が型枠7側よりも強い
ので、保護膜1がコンクリート11の表面に残る。
Next, the above-mentioned protective film 1 is pulled out and cut into a predetermined length, the film 4 on the surface is peeled off, and then temporarily fixed to the inside of the mold 7 with an adhesive 10 as shown in FIG. 4 (A). Then, concrete 11 is poured between the formwork 7 and the support 5 to be solidified and cured for a predetermined time. During this time, the water-curable adhesive 3b reacts with the water content of the concrete 11 and hardens, so that the protective film 1 and the concrete 11 firmly adhere to each other. Finally formwork 7
Since the fixing force on the concrete side is stronger than that on the mold frame 7 side, the protective film 1 remains on the surface of the concrete 11.

従って、コンクリート11と保護膜1の接着強度は、主
に水硬化性接着剤3bによって保たれ、地震や振動に対
しては弾性接着剤3aがこれらを吸収しながら追従する
ので、いずれの場合でも保護膜1が剥がれることはな
い。
Therefore, the adhesive strength between the concrete 11 and the protective film 1 is mainly maintained by the water-curable adhesive 3b, and the elastic adhesive 3a follows the earthquake and vibration while absorbing them. The protective film 1 does not peel off.

尚、本発明の保護膜及び形成方法は、上述の桟橋に限ら
ず、種々のコンクリート構築物に適用可能である。
The protective film and forming method of the present invention are not limited to the above-mentioned jetty and can be applied to various concrete structures.

[発明の効果] 以上詳述したように本発明の保護膜とその形成方法によ
れば、使用前は保護膜を巻いて保管運搬でき、使用後は
コンクリートの表面に保護膜が強固に密着すると共に弾
性や柔軟性によって免震性や耐衝撃性も向上する効果が
ある。
[Effects of the Invention] As described in detail above, according to the protective film and the method for forming the same of the present invention, the protective film can be wound and stored before being used, and after use, the protective film firmly adheres to the surface of the concrete. At the same time, it is effective in improving seismic isolation and impact resistance due to elasticity and flexibility.

【図面の簡単な説明】[Brief description of drawings]

第1図は本発明に係る保護膜の斜視図、第2図はその拡
大断面図、第3図はコンクリート被覆された桟橋支柱の
正面図、第4図(A),(B)は保護膜形成方法の施工状態
図である。 1……保護膜、2……FRP軟質シート、3a……弾性
接着剤、3b……水硬化性接着剤、4……可剥性フィル
ム、5…桟橋の支柱、7……型枠、11…コンクリート
FIG. 1 is a perspective view of a protective film according to the present invention, FIG. 2 is an enlarged sectional view thereof, FIG. 3 is a front view of a concrete-supported jetty column, and FIGS. 4 (A) and 4 (B) are protective films. It is a construction state figure of a formation method. 1 ... Protective film, 2 ... FRP soft sheet, 3a ... Elastic adhesive, 3b ... Hydrosetting adhesive, 4 ... Peelable film, 5 ... Pier support, 7 ... Formwork, 11 …concrete

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】耐食性を有する軟質シートの片面に弾性接
着剤で水硬化性接着剤を貼り付け、その表面を可剥性の
フィルムで被覆したことを特徴とするコンクリート構築
物の保護膜。
1. A protective film for a concrete structure, comprising a flexible sheet having corrosion resistance, a water-curable adhesive attached to one side of the sheet with an elastic adhesive, and the surface of which is covered with a peelable film.
【請求項2】請求項(1)の保護膜のフィルムを剥がして
型枠の内側へ仮止めし、次いで型枠の内部にコンクリー
トを流し込んで固化させ、最後に型枠を外すことを特徴
とするコンクリート構築物の保護膜形成方法。
2. The protective film according to claim 1 is peeled off and temporarily fixed to the inside of the form, concrete is then poured into the form to solidify, and finally the form is removed. Method for forming a protective film on a concrete structure.
JP30136189A 1989-11-20 1989-11-20 Protective film for concrete structure and its formation method Expired - Lifetime JPH0613165B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30136189A JPH0613165B2 (en) 1989-11-20 1989-11-20 Protective film for concrete structure and its formation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30136189A JPH0613165B2 (en) 1989-11-20 1989-11-20 Protective film for concrete structure and its formation method

Publications (2)

Publication Number Publication Date
JPH03161301A JPH03161301A (en) 1991-07-11
JPH0613165B2 true JPH0613165B2 (en) 1994-02-23

Family

ID=17895946

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30136189A Expired - Lifetime JPH0613165B2 (en) 1989-11-20 1989-11-20 Protective film for concrete structure and its formation method

Country Status (1)

Country Link
JP (1) JPH0613165B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040040560A (en) * 2002-11-07 2004-05-13 임석규 Coloring method for a concrete wall
CN111576200B (en) * 2020-06-04 2023-04-11 江苏东南结构防灾工程有限公司 Heavy-duty anticorrosion reinforcing method for underwater pier composite material based on harsh environment
JP7441253B2 (en) * 2022-02-10 2024-02-29 株式会社エステック Method of manufacturing concrete structures

Also Published As

Publication number Publication date
JPH03161301A (en) 1991-07-11

Similar Documents

Publication Publication Date Title
JPH09151613A (en) Reinforcement structure for existing concrete columnar body
JP4035297B2 (en) Reinforcing structure and reinforcing method for concrete structure
JP4608376B2 (en) Reinforcing structure and reinforcing method for concrete structure
JP2003138699A (en) Method for installing new equipment and foundation member
KR100666703B1 (en) Concrete composite column and composite pier
JPH0613165B2 (en) Protective film for concrete structure and its formation method
JP2568319B2 (en) Manufacturing method of precast concrete beam
EP0082580B1 (en) Fender system
JPS62133223A (en) Fiber reinforced concrete structure
JP2002146904A (en) Method for reinforcing concrete structure and reinforced concrete structure
JPH0721199B2 (en) Method for forming protective film of concrete structure
JP2001164892A (en) Tunnel reinforcing method
JPH02307706A (en) Method for forming protective film on concrete structure
JPS6312968B2 (en)
JP2714908B2 (en) Protective film for concrete structure and its forming method
JP2544782B2 (en) Concrete formwork for construction of mass concrete structures
JPS60126448A (en) Crack inducing structure of concrete structure
JPH09250111A (en) Coating material and structure for preventing cover concrete separation
JP2009030351A (en) Root wrapping type column base structure
JP2000213176A (en) Method for reinforcing surface of existing concrete material
JPH0455549A (en) Concrete form
JPS5953419B2 (en) Ferrocement shell structure
JP3211193B2 (en) Composite structure storage tank
JP2002054259A (en) Concrete structure and construction method therefor
JPS59178239A (en) Manufacture of rubber fender