JP3403152B2 - Apparatus and method for cathodic protection of concrete structures - Google Patents
Apparatus and method for cathodic protection of concrete structuresInfo
- Publication number
- JP3403152B2 JP3403152B2 JP2000202624A JP2000202624A JP3403152B2 JP 3403152 B2 JP3403152 B2 JP 3403152B2 JP 2000202624 A JP2000202624 A JP 2000202624A JP 2000202624 A JP2000202624 A JP 2000202624A JP 3403152 B2 JP3403152 B2 JP 3403152B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- concrete
- cathodic protection
- anticorrosion
- holding member
- 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
- 238000004210 cathodic protection Methods 0.000 title claims description 61
- 238000000034 method Methods 0.000 title claims description 26
- 239000000463 material Substances 0.000 claims description 38
- 238000005260 corrosion Methods 0.000 claims description 19
- 230000007797 corrosion Effects 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 description 30
- 238000009826 distribution Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 14
- 238000010276 construction Methods 0.000 description 13
- 239000000835 fiber Substances 0.000 description 13
- 239000004570 mortar (masonry) Substances 0.000 description 12
- 239000004568 cement Substances 0.000 description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- -1 platinum group metal oxide Chemical class 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 238000005304 joining Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 150000004820 halides Chemical class 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 102220491117 Putative postmeiotic segregation increased 2-like protein 1_C23F_mutation Human genes 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Building Environments (AREA)
- Prevention Of Electric Corrosion (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、コンクリート構造
物の電気防食に関し、特にコンクリート構造物中の鉄筋
等の鋼材の電気防食装置および電気防食方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cathodic protection of concrete structures, and more particularly to a cathodic protection device and method for steel materials such as reinforcing bars in concrete structures.
【０００２】[0002]
【従来の技術】コンクリート構造物中の鉄筋は、コンク
リート中のアルカリ性環境では、通常は腐食は進行しな
い。しかし、沿岸部に位置するコンクリート構造物や凍
結防止用に散布された塩化カルシウム、食塩等のハロゲ
ン化物を含有した水に接触する構造物においては、ハロ
ゲン化物がコンクリート中に侵入して、鉄筋の腐食が生
じることがある。鉄筋が腐食すると、生成した鉄の水酸
化物等によって鉄筋の体積が膨脹して、周囲のコンクリ
ートに応力が作用してコンクリートのひび割れが生じ
る。コンクリートに生じたひび割れによって、さらに海
水等のハロゲン化物を含有した水が浸入すると、さらに
鉄筋の腐食が進行し、コンクリート構造物の落下等の重
大な問題が生じる危険性がある。2. Description of the Related Art Reinforcing bars in concrete structures usually do not undergo corrosion in an alkaline environment in concrete. However, in concrete structures located in coastal areas and structures that contact water containing halides such as calcium chloride and salt that have been sprayed to prevent freezing, the halides penetrate into the concrete and Corrosion may occur. When the reinforcing bar corrodes, the volume of the reinforcing bar expands due to the generated iron hydroxide and the like, and stress acts on the surrounding concrete to cause cracking of the concrete. If water containing a halide such as seawater further enters due to cracks formed in the concrete, the corrosion of the reinforcing bars further progresses, which may cause a serious problem such as dropping of the concrete structure.
【０００３】コンクリート構造物中の鉄筋等の鋼構造物
の腐食を防止する手段として、コンクリート構造物の表
面にチタン等の耐食性金属の表面に電極触媒被覆を形成
した電極を装着し、鉄筋を陰極として鉄筋に防食電流を
供給する電気防食方法が知られている。電気防食方法
は、腐食環境下にある鉄筋の電位を、腐食が生じない卑
の方向へと変化させることによって腐食が生じないもの
とするものであり、電気防食用の陽極のコンクリート表
面への設置方法には各種の方法が知られている。例え
ば、サンドブラスト等を使用してコンクリート表面に凹
凸を設ける等の方法によって下地処理を行い、網状陽極
を固定治具を用いてコンクリート表面に設置する。次
に、各網状陽極を電流分配材料を用いスポット溶接し、
陽極間の電気的導通を確保することが行われている。ま
たコンクリート表面に固定した網状陽極は、セメント系
の陽極被覆材（オーバーレイ材）により、陽極全面を被
覆する方法が知られている。ところが、陽極の設置の際
のオバーレイモルタルにより、施工後構造物の死荷重が
増加するという問題点があった。また、オーバーレイ材
等のモルタルの防食対象への被覆は、所定の厚さまで何
回かに分けて塗布し、モルタルとコンクリート躯体との
接着力を十分に確保することが必要であり、熟練した技
能者による作業が必要となる。As a means for preventing corrosion of steel structures such as reinforcing bars in concrete structures, an electrode having an electrode catalyst coating formed on the surface of a corrosion resistant metal such as titanium is mounted on the surface of the concrete structure, and the reinforcing bars are used as a cathode. As a known method, an anticorrosion method for supplying an anticorrosion current to a reinforcing bar is known. The cathodic protection method is one in which corrosion does not occur by changing the electric potential of the rebar in a corrosive environment to a base direction where corrosion does not occur.Installing the cathodic anode on the concrete surface. Various methods are known as methods. For example, a ground treatment is performed by a method such as providing unevenness on the concrete surface by using sandblast or the like, and the reticulated anode is installed on the concrete surface using a fixing jig. Next, spot welding each reticulated anode using a current distribution material,
Ensuring electrical continuity between the anodes is practiced. A method is known in which the mesh anode fixed on the concrete surface is covered with a cement-based anode coating material (overlay material). However, there is a problem that the dead load of the structure after construction increases due to the Overlay mortar when the anode is installed. In addition, it is necessary to coat the mortar such as overlay material on the anticorrosion target in several steps up to the specified thickness to ensure sufficient adhesive force between the mortar and the concrete skeleton. Work by a person is required.
【０００４】また、コンクリート表面に帯状陽極を埋設
するために、コンクリートカッター等を用いて一定の間
隔で溝の切削を行う方法が知られている。この方法で
は、切削した溝へ帯状陽極を固定し、各陽極を電流分配
部材で結合し、同一回路内で電気的に一体となるように
した後、溝をセメントモルタルで充填する。また、直接
海水などのしぶきを受けるような厳しい環境において
は、溝に型枠を設置しセメント系充填材を注入すること
が行われている。ところが、既設構造物に施工する場
合、帯状陽極をコンクリート表面に埋設するための溝を
コンクリートカッター等により切削して除去する必要が
あり、対象構造物において、劣化の見られない健全な個
所にも陽極を埋設するための溝を設ける必要がある。帯
状陽極は、対象構造物中の鋼材に均一に防食電流を供給
するため少なくとも両極の配置間隔が３０ｃｍ以下とな
るように溝を設け、陽極を設置する必要があり、この作
業に時間を要する。また、鉄筋上のコンクリートのかぶ
り厚さが小さい場合には、陽極と鉄筋が短絡する危険性
があるので施工が不可能となる。また、コンクリート中
に埋め込まれた鉄筋の結束に用いられた結束線との短絡
の可能性もあり、常に陽極と鉄筋との絶縁を確認しなが
ら施工しなければならないと言う問題点があった。Further, there is known a method of cutting grooves at regular intervals by using a concrete cutter or the like in order to embed the strip-shaped anode on the concrete surface. In this method, band-shaped anodes are fixed to the cut grooves, the respective anodes are connected by a current distribution member so that they are electrically integrated in the same circuit, and then the grooves are filled with cement mortar. Further, in a severe environment where it is directly splashed with seawater or the like, a mold is installed in the groove to inject the cement-based filler. However, when constructing on an existing structure, it is necessary to cut and remove the groove for embedding the strip-shaped anode on the concrete surface by a concrete cutter, etc. It is necessary to provide a groove for embedding the anode. In order to uniformly supply the steel material in the target structure with an anticorrosion current, the strip-shaped anode needs to be provided with a groove so that the interval between the electrodes is 30 cm or less, and the anode needs to be installed, which requires time. Further, when the cover thickness of the concrete on the reinforcing bar is small, there is a risk that the anode and the reinforcing bar are short-circuited, so that the construction becomes impossible. In addition, there is a possibility of short-circuiting with the binding wire used for binding the reinforcing bars embedded in the concrete, and there is a problem that the construction must always be performed while confirming the insulation between the anode and the reinforcing bars.
【０００５】また、コンクリート構造物に所定の径、お
よび深さの孔を振動ドリル等によって形成し、陽極棒を
孔に挿入する方法が知られている。この方法では、孔内
部にバックフィルを充填後、陽極棒を孔に挿入し、チタ
ン線などによって各陽極棒を結線し、陽極棒頭部及びチ
タン線を溝に収めて調合モルタル等で埋め戻すことが行
われている。ところが、この方法では、陽極棒の配置は
コンクリート表面積１ｍ2 当たり少なくとも１０本以上
埋設するために、数多くの設置孔を設ける必要があっ
た。また、コンクリート表面からコンクリート中へ陽極
棒を挿入するために、コンクリート中の鉄筋との接触の
危険性があり、陽極棒の１本、１本が鉄筋と接触してい
ないかを調査しながら施工しなくてはならず、陽極設置
に手間を要した。また、鉄筋上のコンクリートのかぶり
厚さが陽極棒の長さよりも小さい場合には、陽極棒を設
置することが不可能である。また、防食電流を均一に供
給するためには、挿入した個々の陽極棒の先端と鉄筋と
の距離が問題となるので、挿入用の孔を設ける前に、対
象構造物中の鉄筋の配置状況をレーダー等を用いて調査
をし、最適な陽極位置を求めることが必要であった。There is also known a method in which a hole having a predetermined diameter and a predetermined depth is formed in a concrete structure with a vibration drill or the like, and an anode rod is inserted into the hole. In this method, after filling the inside of the hole with a backfill, the anode rod is inserted into the hole, each anode rod is connected by a titanium wire, etc., and the anode rod head and the titanium wire are housed in a groove and backfilled with compounding mortar etc. Is being done. However, in this method, it is necessary to provide a large number of installation holes in order to dispose at least 10 or more anode rods per 1 m 2 of concrete surface area. Also, since the anode rod is inserted into the concrete from the concrete surface, there is a risk of contact with the reinforcing bars in the concrete, and construction is carried out while investigating whether or not each of the anode rods is in contact with the reinforcing bars. It was necessary to do so, and it took time to install the anode. Further, when the cover thickness of concrete on the reinforcing bar is smaller than the length of the anode rod, it is impossible to install the anode rod. Also, in order to uniformly supply the anticorrosion current, the distance between the tip of each inserted anode rod and the reinforcing bar becomes a problem.Therefore, the arrangement of reinforcing bars in the target structure should be done before the holes for insertion are provided. It was necessary to conduct an investigation using a radar to find the optimum anode position.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、電気防食電
極の取り付けが容易で、またコンクリート構造物に対し
ても負担が小さく、施工性が良好で、しかも防食効果が
大きなコンクリート構造物中の鋼材の電気防食装置およ
び電気防食方法を提供することを課題とするものであ
る。DISCLOSURE OF THE INVENTION The present invention provides a concrete structure in which an anticorrosion electrode can be easily attached, has a small load on a concrete structure, has good workability, and has a large anticorrosion effect. An object of the present invention is to provide an electrolytic protection device for steel and an electrolytic protection method.
【０００７】[0007]
【課題を解決するための手段】本発明の課題は、コンク
リート構造物の電気防食装置において、コンクリート表
面に、電気防食電極保持部材を有し、該電気防食電極保
持部材中には電気防食電極を有するとともに充填材が満
たされており、電気防食電極とコンクリート構造物中の
鋼材との間に防食電流を通電する手段を有するコンクリ
ート鋼構造物の電気防食装置によって解決することがで
きる。電気防食電極がコンクリート表面に固定部材によ
って固定されている前記のコンクリート構造物の電気防
食装置である。SUMMARY OF THE INVENTION An object of the present invention is to provide an electrocorrosion protection apparatus for a concrete structure, the electrocorrosion electrode holding member being provided on the concrete surface, and the electrocorrosion electrode being provided in the electrocorrosion electrode holding member. This can be solved by a cathodic protection device for a concrete steel structure which has a filling material and which has means for passing an anticorrosion current between the cathodic protection electrode and the steel material in the concrete structure. The cathodic protection device for a concrete structure, wherein the cathodic protection electrode is fixed to the concrete surface by a fixing member.
【０００８】また、コンクリート構造物の電気防食方法
において、防食対象のコンクリート表面に、電気防食電
極保持部材を固定した後に、該電気防食電極保持部材中
に電気防食電極を配置し固定し、その後に電気防食電極
保持部材中に充填材を塗布あるいは注入によって充填
し、コンクリート構造物の鋼材と電気防食電極との間に
防食電流を通電するコンクリート構造物の電気防食方法
である。コンクリート構造物の電気防食方法において、
防食対象のコンクリート表面に、内部に電気防食電極を
備えた電気防食電極保持部材を固定した後に、該電気防
食電極保持部材中に充填材を塗布あるいは注入によって
充填し、コンクリート構造物の鋼材と電気防食電極との
間に防食電流を通電するコンクリート構造物の電気防食
方法である。Further, in the method for cathodic protection of a concrete structure, after fixing an electrocorrosion electrode holding member to the concrete surface to be corroded, the electrocorrosion electrode is placed and fixed in the electrocorrosion electrode holding member, and thereafter, A method for cathodic protection of a concrete structure, in which a filler is applied or filled into a holding member for the cathodic protection electrode, and an anticorrosion current is passed between a steel material of the concrete structure and the cathodic electrode. In the method of cathodic protection for concrete structures,
After fixing the cathodic protection electrode holding member having the cathodic protection electrode inside the concrete surface to be anticorrosion, a filler is applied or filled into the cathodic protection electrode holding member to fill the concrete structure with the steel material. It is a method of galvanic protection of a concrete structure in which a corrosion protection current is passed between it and a corrosion protection electrode.
【０００９】[0009]
【発明の実施の形態】本発明は、電気防食電極保持部材
を用いることによって、コンクリート表面を切削加工す
る等の工程を経ることなく直接に電気防食電極を装着す
ることができるので、施工性良く電気防食装置を作製す
ることができるという特徴を有している。そして、本発
明の電気防食装置および電気防食方法によって施工後の
死荷重の増加等の問題点、コンクリートの切削加工、あ
るいは電極用の孔形成の問題点等を解決することがで
き、コンクリート構造物中の鋼材へ防食電流が均一に供
給され、コンクリート構造物中の鋼材を効果的に防食す
ることができる。BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, by using a member for holding an anticorrosion electrode, it is possible to directly attach the electrode for anticorrosion without going through a process such as cutting the surface of concrete. It has a feature that an electrocorrosion protection device can be manufactured. Then, by the cathodic protection device and the cathodic protection method of the present invention, it is possible to solve problems such as increase of dead load after construction, problems of concrete cutting, or formation of holes for electrodes, etc. The anticorrosion current is uniformly supplied to the steel material inside, and the steel material in the concrete structure can be effectively anticorrosive.
【００１０】以下に図面を参照して本発明を説明する。
図１は、本発明の電気防食装置を説明する図である。本
発明の電気防食装置１をコンクリート２の表面に装着し
た状態を説明する斜視図であり、一部を切り欠いて示し
ている。コンクリート２中には鉄筋３が配置されてお
り、コンクリート２の表面に、電気防食電極保持部材４
が取り付けられている。電気防食電極保持部材４中に
は、電気防食電極５がコンクリート２の表面に接して配
置されており、電気防食電極保持部材４中には、充填材
１０が充填されており、電気防食電極５を被覆してい
る。また、電気防食電極保持部材の上部は、蓋体４１が
設けられており、内部の電気防食電極および充填材１０
が保護されている。各電気防食電極は、電流分配部材６
によって電気的に接続されており、電流分配部材６、お
よび鉄筋３には防食電流供給用リード線７および８が接
統されており、電源９から、防食電流が供給される。The present invention will be described below with reference to the drawings.
FIG. 1 is a diagram for explaining the cathodic protection device of the present invention. It is a perspective view explaining the state where the cathodic protection device 1 of the present invention was attached to the surface of concrete 2, and a part is notched and shown. Reinforcing bars 3 are arranged in the concrete 2, and the surface of the concrete 2 is provided with a member 4 for holding the anticorrosion electrode.
Is attached. The cathodic protection electrode holding member 4 is provided with a cathodic protection electrode 5 in contact with the surface of the concrete 2, and the cathodic protection electrode holding member 4 is filled with a filler 10. Is covered. Further, a lid 41 is provided on the upper portion of the electrolytic protection electrode holding member, and the internal protective electrode and the filling material 10 are provided.
Are protected. Each of the cathodic protection electrodes has a current distribution member 6
Are electrically connected to each other, and lead wires 7 and 8 for supplying an anticorrosion current are connected to the current distribution member 6 and the reinforcing bar 3, and an anticorrosion current is supplied from a power source 9.
【００１１】図２は、本発明の電気防食装置の電気防食
電極保持部材の断面を示す図である。電気防食電極５
は、コンクリート２の表面に接するように配置されてお
り、電気防食電極保持部材４の設置面４２がコンクリー
ト表面に固定されている。また、電気防食電極保持部材
４内には、電気防食電極５を被覆する充填材１０で満た
されており、蓋体４１で覆われている。FIG. 2 is a view showing a cross section of a member for holding the anticorrosion electrode of the anticorrosion device of the present invention. Electrolytic electrode 5
Are arranged so as to be in contact with the surface of the concrete 2, and the installation surface 42 of the electrolytic protection electrode holding member 4 is fixed to the concrete surface. Further, the inside of the electrolytic protection electrode holding member 4 is filled with the filling material 10 that covers the electrolytic protection electrode 5, and is covered with the lid 41.
【００１２】図３は、電気防食電極保持部材の一例を説
明する図であり、図３（Ａ）は、平面図、図３（Ｂ）
は、Ａ−Ａ’線での断面図であり、図３（Ｃ）はＢ−
Ｂ’線での断面図である。また、図３（Ｄ）は、電極を
取り付けた状態を説明する図である。電気防食電極保持
部材４は、コンクリート２の表面に接する設置面４２を
有し、内部に配置する防食電極がコンクリート表面と接
するように底部には開口部４３を有すると共に、開口部
４３の間には、電気防食電極保持部材４の両側の部材を
結合する保持部４４を有し、保持部４４には、コンクリ
ート表面に固定部材によって電気防食電極保持部材４、
電気防食電極の少なくともいずれか一方を取り付けるた
めの貫通孔４５が設けられている。また、図３（Ｄ）に
示した例では、電気防食電極保持部材４は、コンクリー
ト表面に設置面４２によって設置され、電気防食電極５
は、固定部材１１によって取り付けらている。固定部材
１１は、固定部の電極面が表面に表れるように、プラグ
部１２と開口部を設けたフランジ部１３から構成されて
いる。3A and 3B are views for explaining an example of the electrode member for holding the anticorrosion electrode. FIG. 3A is a plan view and FIG. 3B.
Is a cross-sectional view taken along the line AA ′, and FIG.
It is sectional drawing in a B'line. Further, FIG. 3D is a diagram illustrating a state in which an electrode is attached. The anticorrosion electrode holding member 4 has an installation surface 42 that contacts the surface of the concrete 2, and has an opening 43 at the bottom so that the anticorrosion electrode placed inside contacts the concrete surface, and between the openings 43. Has a holding portion 44 that joins the members on both sides of the cathodic protection electrode holding member 4, and the holding portion 44 has a holding member 44 fixed to the concrete surface by a holding member.
A through hole 45 for mounting at least one of the cathodic protection electrodes is provided. Further, in the example shown in FIG. 3D, the anticorrosion electrode holding member 4 is installed on the concrete surface by the installation surface 42, and
Are attached by a fixing member 11. The fixing member 11 is composed of a plug portion 12 and a flange portion 13 provided with an opening so that the electrode surface of the fixing portion appears on the surface.
【００１３】本発明の電気防食装置に使用する電気防食
電極としては、チタン等の耐食性金属からなる帯状の基
材、あるいはエキスパンデッドメタルからなる基材上
に、白金、パラジウム、ロジウム、イリジウム、および
ルテニウム等の白金族の金属酸化物と酸化チタン、酸化
タンタル等のバルブ金属酸化物との複合酸化物からなる
電極触媒被覆を形成したもの、あるいはコバルトスピネ
ル化合物からなる電極触媒被覆を形成したものが好まし
く、電極触媒被覆の形成に先だって、白金等の金属から
なる下地層を形成したものであっても良い。The cathodic protection electrode used in the cathodic protection device of the present invention comprises a strip-shaped base material made of a corrosion-resistant metal such as titanium or a base material made of expanded metal, and platinum, palladium, rhodium, iridium, And an electrode catalyst coating formed of a complex oxide of a platinum group metal oxide such as ruthenium and a valve metal oxide such as titanium oxide or tantalum oxide, or an electrode catalyst coating formed of a cobalt spinel compound However, an underlayer made of a metal such as platinum may be formed prior to the formation of the electrode catalyst coating.
【００１４】また、電気防食電極保持部材としては、絶
縁性材料を用いることができるが、コンクリートと同程
度の体積固有抵抗を有する材料の場合には、電気防食電
極保持部材を通じた電気防食電流の通電が可能となり、
電気防食電極保持部材が電気的な障害物とならないので
より好ましい。このような物質を用いる場合には、体積
固有抵抗が１０００Ωｃｍ以上、５００００Ωｃｍ以下
のものが好ましい。具体的には、塩化ビニル樹脂、ポリ
アミド樹脂等の耐食性が大きな合成樹脂材料、セラミッ
クス等の不良導電性材料と共にチタン等の腐食性環境に
おいて表面に緻密な酸化皮膜を形成し電極としては機能
しなくなる薄膜形成性金属等、あるいはコンクリートを
用いることができる。An insulating material can be used as the holding member for the anticorrosion electrode. However, in the case of a material having a volume resistivity similar to that of concrete, the holding member for holding the anticorrosion electrode can prevent an electric corrosion current from flowing through the holding member. It becomes possible to energize,
It is more preferable because the member for holding the anticorrosion electrode does not become an electrical obstacle. When such a substance is used, it is preferable that the volume resistivity is 1000 Ωcm or more and 50,000 Ωcm or less. Specifically, it forms a dense oxide film on the surface in a corrosive environment such as titanium together with a synthetic resin material with high corrosion resistance such as vinyl chloride resin and polyamide resin, poor conductive material such as ceramics, and it does not function as an electrode A thin film-forming metal or the like, or concrete can be used.
【００１５】特に、セメント系のモルタル等を材料とし
たセメント系の材料は、防食電流を通電した場合に防食
対象のコンクリートと電気抵抗等の面において同等の挙
動を示すので、電気防食電極保持部材には開口部を設け
なくてもコンクリート中の防食対象の鉄筋に対して防食
電流を通電することが可能である。しかも、セメント系
の材料によって製造した電気防食電極保持部材は、熱膨
張係数等もコンクリートと同等の値のものが得られるの
で、熱膨張係数の不一致による変形等が生じることが少
ない。In particular, a cement-based material made of cement-based mortar or the like exhibits the same behavior in terms of electrical resistance and the like as the concrete to be protected against corrosion when an anticorrosive current is passed through it. It is possible to apply anticorrosion current to the reinforcing bars to be anticorrosion in the concrete without providing an opening. Moreover, since the electro-corrosion electrode holding member manufactured from a cement-based material has a coefficient of thermal expansion similar to that of concrete, it is less likely to be deformed due to a mismatch of coefficients of thermal expansion.
【００１６】また、電気防食電極保持部材中に充填する
充填材としては、電気防食電極とコンクリート表面との
間に生じた空隙を充填するとともに電気防食電極を被覆
して、防食対象のコンクリートと一体化するコンクリー
トと同程度のイオン導電性を示す材料を用いることが好
ましく、例えば、セメント系のモルタル、セメントペー
スト等が挙げられる。これらの充填材中には、ｐＨ１２
程度の高ｐＨで非導電性の繊維を含有してもも良い。使
用可能な繊維としては、アルミナ、チタニア及びジルコ
ニアの繊維等のセラミック繊維、ポリエチレン、ポリプ
ロピレン等ポリオレフィンの繊維、芳香族ポリアミド繊
維、ポリアミドの繊維、ポリテトラフルオロエチレン繊
維を含むポリハロカーボン繊維、ポリカーボネート繊維
及びポリエチレンテレフタレート繊維等のポリエステル
繊維等を挙げることができ、表面が平滑ではない繊維が
好ましい。Further, as the filler to be filled in the electrode for holding the anticorrosion electrode, the gap between the electrode for anticorrosion and the surface of the concrete is filled and the electrode for anticorrosion is covered to be integrated with the concrete to be anticorrosion. It is preferable to use a material having the same ionic conductivity as that of the concrete to be converted, and examples thereof include cement-based mortar and cement paste. In these fillers, pH 12
It may contain a non-conductive fiber having a high pH. Usable fibers include ceramic fibers such as alumina, titania and zirconia fibers, polyolefin fibers such as polyethylene and polypropylene, aromatic polyamide fibers, polyamide fibers, polyhalocarbon fibers including polytetrafluoroethylene fibers, and polycarbonate fibers. And polyester fibers such as polyethylene terephthalate fibers and the like, and fibers having a non-smooth surface are preferred.
【００１７】また、コンクリート表面に装着した複数の
電気防食電極保持部材内の各電気防食電極を導電接統す
る電流分配部材としては、電気防食電極の基材として使
用するチタン等の耐食性が大きな金属材料で作製するこ
とが好ましいが、被覆した電線等を用いて接合しても良
い。Further, as a current distribution member for electrically connecting and connecting the respective anticorrosion electrodes in a plurality of the anticorrosion electrode holding members mounted on the concrete surface, a metal having a large corrosion resistance such as titanium used as a base material of the anticorrosion electrodes. It is preferable to use a material, but a covered electric wire or the like may be used for joining.
【００１８】次に、本発明の電気防食装置の設置方法に
ついて説明する。まず、防食対象となるコンクリート構
造物の表面に塗膜があれば表面の塗膜を除去し、コンク
リート表面にひび割れ等がある場合には、ひび割れ部を
充填する。次いで、コンクリート中に配置された鉄筋の
配置間隔、あるいは配置の疎密に応じて、鉄筋に所望の
防食電流が通電可能となるように電気防食電極の配置間
隔を考慮して電気防食電極保持部材および電気防食電極
を取り付ける。電気防食電極保持部材の取り付けは、コ
ンクリートに設けた孔に固定部材を挿入することによっ
て取り付けても、あるいは接着性物質で取り付けても良
く、あるいは両者を用いて取り付けても良い。Next, a method of installing the cathodic protection device of the present invention will be described. First, if there is a coating film on the surface of the concrete structure to be protected against corrosion, the coating film on the surface is removed, and if the concrete surface has cracks or the like, the crack portion is filled. Then, the arrangement interval of the reinforcing bars arranged in the concrete, or, depending on the density of the arrangement, considering the arrangement interval of the anticorrosion electrodes so that the desired anticorrosion current can be applied to the reinforcing bars, Attach the cathodic protection electrode. The electrode for holding the anticorrosion electrode may be attached by inserting a fixing member into a hole provided in concrete, or by using an adhesive substance, or by using both.
【００１９】また、電気防食電極は、電気防食電極保持
部材と一体に固定部材によって取り付けても、あるいは
電気防食電極保持部材の取り付け手段とは別個の取り付
け手段によって取り付けても良い。電気防食電極を取り
付けた後に、各電気防食電極に電流分配部材を結合した
後に電気防食電極保持部材中に充填材を充填し、次い
で、電気防食電極保持部材の上部に蓋体を取り付けても
良い。また、電流分配部材を配置する部分を残して施工
し、電流分配部材を後から取り付けても良い。次いで、
電流分配部材とコンクリート中の鉄筋に防食電流の供給
用のリード線を接続し、電源から防食環境に応じた防食
電流を供給することによって防食することができる。The cathodic protection electrode may be mounted integrally with the cathodic protection electrode holding member by a fixing member, or may be mounted by a mounting means separate from the mounting means of the cathodic protection electrode holding member. After attaching the cathodic protection electrodes, a current distribution member may be coupled to each cathodic protection electrode, and then a filling material may be filled into the cathodic protection electrode holding member, and then a lid may be attached to the upper portion of the cathodic protection electrode holding member. . Alternatively, the current distributing member may be attached afterward by leaving the portion for disposing the current distributing member. Then
Corrosion can be prevented by connecting a lead wire for supplying an anticorrosion current to the current distribution member and the reinforcing bar in the concrete and supplying the anticorrosion current according to the anticorrosion environment from the power supply.
【００２０】図４は、本発明の電気防食電極保持部材を
用いた一実施例を説明する図であり、施工面の断面を説
明する図である。図４（Ａ）に示すように、コンクリー
ト２の表面に、コンクリート２内部の鉄筋３に均等に防
食電流が供給されるように所定の間隔を設けて防食電極
保持部材４を配置する。次いで、図４（Ｂ）に示すよう
に、固定部材１１によって防食電極保持部材を固定した
後に、電気防食電極保持部材４の内部に電気防食電極５
を固定する。次いで、図４（Ｃ）に示すように電気防食
電極保持部材４の内部にモルタル等の充填材１０を充墳
し、電気防食電極５の表面を覆う。また、各電気防食電
極には、充填材を充填する前に電流分配部材を結合して
も、あるいは電流分配部材との結合部分を残して施工
し、電流分配部材を後から取り付けても良い。FIG. 4 is a diagram for explaining an embodiment using the electrocorrosion electrode holding member of the present invention, and is a diagram for explaining a cross section of a construction surface. As shown in FIG. 4 (A), the anticorrosion electrode holding members 4 are arranged on the surface of the concrete 2 at predetermined intervals so that the anticorrosion current is evenly supplied to the reinforcing bars 3 inside the concrete 2. Next, as shown in FIG. 4B, after fixing the anticorrosion electrode holding member by the fixing member 11, the electrocorrosion electrode 5 is placed inside the electrocorrosion electrode holding member 4.
To fix. Next, as shown in FIG. 4C, a filling material 10 such as mortar is filled inside the electrocorrosion electrode holding member 4 to cover the surface of the electrocorrosion electrode 5. Further, a current distribution member may be joined to each of the cathodic protection electrodes before being filled with the filling material, or may be constructed by leaving the joining portion with the current distribution member and attached later.
【００２１】図５は、本発明の電気防食電極保持部材を
用いた他の実施例を説明する図であり、施工面の断面を
説明する図である。図５（Ａ）に示すように、コンクリ
ート２の表面に、コンクリート２内部の鉄筋３に均等に
防食電流が供給されるように所定の間隔を設けて電気防
食電極保持部材４を配置する。次いで、図５（Ｂ）に示
すように、固定部材１１によって電気防食電極保持部材
を固定した後に、電気防食電極保持部材４の内部に電気
防食電極５を固定する。更に、図４（Ｃ）に示すよう
に、蓋体４１を取り付けた後に、充填材注入管１４によ
ってモルタル等の充填材１０を充填し、図４（Ｄ）に示
すように充填材を硬化した後に、図４（Ｅ）に示すよう
に、電気防食電極保持部材４を覆った蓋体４１を取り除
くことによって電気防食装置を完成する。また、各電気
防食電極には、充填材を充填する前に電流分配部材を結
合しても、あるいは電流分配部材との結合部分を残して
施工し、電流分配部材を後から取り付けても良い。FIG. 5 is a view for explaining another embodiment using the electrocorrosion electrode holding member of the present invention, and is a view for explaining a cross section of a construction surface. As shown in FIG. 5A, the anticorrosion electrode holding members 4 are arranged on the surface of the concrete 2 at predetermined intervals so that the anticorrosion current is evenly supplied to the reinforcing bars 3 inside the concrete 2. Next, as shown in FIG. 5B, after fixing the electrocorrosion electrode holding member by the fixing member 11, the electrocorrosion electrode 5 is fixed inside the electrocorrosion electrode holding member 4. Further, as shown in FIG. 4 (C), after the lid 41 is attached, the filler 10 such as mortar is filled with the filler injection pipe 14, and the filler is cured as shown in FIG. 4 (D). After that, as shown in FIG. 4 (E), the cover 41 covering the electrode 4 for holding the anticorrosion electrode is removed to complete the electrocorrosion device. Further, a current distribution member may be joined to each of the cathodic protection electrodes before being filled with the filling material, or may be constructed by leaving the joining portion with the current distribution member and attached later.
【００２２】図６は、本発明の電気防食電極保持部材を
用いた他の実施例を説明する図であり、施工面の断面を
説明する図である。図６（Ａ）に示すように、電気防食
電極保持部材４に電気防食電極５を取り付けた後に、図
６（Ｂ）に示すように、コンクリート２の表面に、コン
クリート２内部の鉄筋３に均等に防食電流が供給される
ように所定の間隔を設けて電気防食電極保持部材４を配
置し、固定部材１１によって固定する。次いで、図６
（Ｃ）に示すように、電気防食電極保持部材の内部にモ
ルタル等の充填材１０を充填し電気防食電極５の表面を
覆い電気防食装置を完成する。また、各電気防食電極に
は、充填材を充填する前に電流分配部材を結合しても、
あるいは電流分配部材との結合部分を残して施工し、電
流分配部材を後から取り付けても良い。FIG. 6 is a view for explaining another embodiment using the electrocorrosion electrode holding member of the present invention, and is a view for explaining a cross section of a construction surface. As shown in FIG. 6 (A), after attaching the anticorrosion electrode 5 to the anticorrosion electrode holding member 4, as shown in FIG. 6 (B), the surface of the concrete 2 is evenly distributed to the reinforcing bars 3 inside the concrete 2. The electrocorrosion electrode holding member 4 is arranged at a predetermined interval so that the anticorrosion current is supplied to and fixed by the fixing member 11. Then, FIG.
As shown in (C), the filling material 10 such as mortar is filled inside the holding member for the anticorrosion electrode to cover the surface of the anticorrosion electrode 5 to complete the anticorrosion device. In addition, even if a current distribution member is connected to each of the anticorrosion electrodes before filling the filling material,
Alternatively, the connection may be made with the current distribution member left, and the current distribution member may be attached later.
【００２３】図７は、本発明の電気防食電極保持部材を
用いた他の実施例を説明する図であり、施工面の断面を
説明する図である。図７（Ａ）に示すように、コンクリ
ート２の表面に、コンクリート２内部の鉄筋３に均等に
防食電流が供給されるように所定の間隔を設けて、内部
に予め電気防食電極５を設けた防食電極保持部材４を配
置し、固定部材１１によって電気防食電極保持部材４を
固定する。次いで、図７（Ｂ）に示すように、電気防食
電極保持部材４に蓋体４１を取り付けた後に、充填材注
入管１４によってモルタル等の充填材１０を充填する。
更に、図７（Ｃ）に示すように充填材を硬化した後に、
図７（Ｄ）に示すように、電気防食電極保持部材４を覆
った蓋体４１を取り除くことによって電気防食装置を完
成する。また、各電気防食電極には、充填材を充填する
前に電流分配部材を結合しても、あるいは電流分配部材
との結合部分を残して施工し、電流分配部材を後から取
り付けても良い。FIG. 7 is a view for explaining another embodiment using the electrocorrosion electrode holding member of the present invention, and is a view for explaining a cross section of a construction surface. As shown in FIG. 7 (A), the surface of the concrete 2 is provided with a predetermined interval so that the anticorrosion current is evenly supplied to the reinforcing bars 3 inside the concrete 2, and the anticorrosion electrode 5 is provided inside in advance. The anticorrosion electrode holding member 4 is arranged, and the electrocorrosion electrode holding member 4 is fixed by the fixing member 11. Next, as shown in FIG. 7B, after the lid 41 is attached to the electrocorrosion electrode holding member 4, the filling material injection pipe 14 is filled with the filling material 10 such as mortar.
Further, after curing the filler as shown in FIG. 7 (C),
As shown in FIG. 7 (D), the lid 41 that covers the electrocorrosion electrode holding member 4 is removed to complete the electrocorrosion protection device. Further, a current distribution member may be joined to each of the cathodic protection electrodes before being filled with the filling material, or may be constructed by leaving the joining portion with the current distribution member and attached later.
【００２４】また、図８は、本発明の電気防食装置を施
工した例を説明する図である。図８（Ａ）は、コンクリ
ート構造物２０の側面を説明する図であり、コンクリー
ト構造物の壁面に本発明の電気防食電極保持部材４を配
置したものである。コンクリート構造物中には、直径９
ｍｍの異形鉄筋が１００ｍｍの間隔で縦横に配置されて
おり、コンクリート表面にモルタルが付着しやすいよう
に下地処理を行った後に、図８（Ｂ）に示すように、底
面に開口部を有し、内部に電気防食電極を取り付けた塩
化ビニル樹脂製の幅２５ｍｍ、長さ１００ｍｍの防食電
極保持部材４を３００ｍｍの間隔でコンクリート構造物
の壁面に取り付けた。そして、各電気防食電極を電流分
配部材６によって結合した後に、電気防食電極保持部材
４内部にモルタル充填した。次いで、鉄筋と電気防食電
極の間に電流を通電することによって、鉄筋には１００
ｍＶの均一な分極を与えることができた。FIG. 8 is a diagram for explaining an example in which the cathodic protection device of the present invention is installed. FIG. 8A is a view for explaining the side surface of the concrete structure 20, in which the electrocorrosion electrode holding member 4 of the present invention is arranged on the wall surface of the concrete structure. Diameter 9 in concrete structure
mm deformed rebars are arranged vertically and horizontally at intervals of 100 mm, and after the base treatment is performed so that the mortar easily adheres to the concrete surface, as shown in FIG. 8 (B), the bottom surface has an opening. Then, the anticorrosion electrode holding member 4 made of vinyl chloride resin and having a width of 25 mm and a length of 100 mm in which an electrocorrosion electrode was attached was attached to the wall of the concrete structure at intervals of 300 mm. Then, after each electrocorrosion electrode was coupled by the current distribution member 6, the interior of the electrocorrosion electrode holding member 4 was filled with mortar. Then, by passing an electric current between the reinforcing bar and the cathodic protection electrode, the reinforcing bar is heated to 100%.
It was possible to give a uniform polarization of mV.
【００２５】[0025]
【発明の効果】本発明の電気防食装置によって、コンク
リート構造物の鋼材の電気防食を容易に、しかもコンク
リート構造物に大きな荷重を与えることがなく行うこと
が可能となる。The cathodic protection device of the present invention makes it possible to catalyze the steel material of a concrete structure easily and without applying a large load to the concrete structure.
【図面の簡単な説明】[Brief description of drawings]
【図１】図１は、本発明の電気防食装置を説明する図で
ある。FIG. 1 is a diagram illustrating a cathodic protection device of the present invention.
【図２】図２は、本発明の電気防食装置の防食電極保持
部材の断面を示す図である。FIG. 2 is a view showing a cross section of an anticorrosion electrode holding member of the anticorrosion device of the present invention.
【図３】図３は、防食電極保持部材の一例を説明する図
である。FIG. 3 is a diagram illustrating an example of an anticorrosion electrode holding member.
【図４】図４は、本発明の電気防食電極保持部材を用い
た実施例を説明する図であり、施工面の断面を説明する
図である。FIG. 4 is a diagram for explaining an embodiment using the electrocorrosion electrode holding member of the present invention, and is a diagram for explaining a cross section of a construction surface.
【図５】図５は、本発明の電気防食電極保持部材を用い
た他の実施例を説明する図であり、施工面の断面を説明
する図である。FIG. 5 is a diagram for explaining another embodiment using the electrocorrosion electrode holding member of the present invention, and is a diagram for explaining a cross section of a construction surface.
【図６】図６は、本発明の電気防食電極保持部材を用い
た他の実施例を説明する図であり、施工面の断面を説明
する図である。FIG. 6 is a view for explaining another embodiment using the electrocorrosion electrode holding member of the present invention, and is a view for explaining a cross section of a construction surface.
【図７】図７は、本発明の電気防食電極保持部材を用い
た他の実施例を説明する図であり、施工面の断面を説明
する図である。FIG. 7 is a diagram for explaining another embodiment using the electrocorrosion electrode holding member of the present invention, and is a diagram for explaining a cross section of a construction surface.
【図８】図８は、本発明の電気防食装置を施工した例を
説明する図である。FIG. 8 is a diagram illustrating an example in which the cathodic protection device of the present invention is installed.
１…電気防食装置、２…コンクリート、３…鉄筋、４…
電気防食電極保持部材、５…電気防食電極、６…電流分
配部材、７，８…防食電流供給用リード線、９…電源、
１０…充填材、１１…固定部材、１２…プラグ部、１３
…フランジ部、１４…充填材注入管、２０…コンクリー
ト構造物、４１…蓋体、４２…設置面、４３…開口部、
４４…保持部、４５…貫通孔1 ... Electrocorrosion protection device, 2 ... Concrete, 3 ... Reinforcing bar, 4 ...
Electrocorrosion electrode holding member, 5 ... Electrocorrosion electrode, 6 ... Current distribution member, 7, 8 ... Lead wire for supplying anticorrosion current, 9 ... Power supply,
10 ... Filler material, 11 ... Fixing member, 12 ... Plug part, 13
... Flange part, 14 ... Filler injection pipe, 20 ... Concrete structure, 41 ... Lid, 42 ... Installation surface, 43 ... Opening,
44 ... Holding part, 45 ... Through hole
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C23F 13/00 E02D 31/06 E04B 1/64 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) C23F 13/00 E02D 31/06 E04B 1/64
Claims (4)
いて、コンクリート表面に、電気防食電極保持部材を有
し、該電気防食電極保持部材中には電気防食電極を有す
るとともに充填材が満たされており、電気防食電極とコ
ンクリート構造物中の鋼材との間に防食電流を通電する
手段を有することを特徴とするコンクリート鋼構造物の
電気防食装置。1. A cathodic protection device for a concrete structure, wherein a concrete surface has a cathodic protection electrode holding member, and the cathodic protection electrode holding member has a cathodic protection electrode and is filled with a filler. A cathodic protection device for a concrete steel structure, comprising means for passing a corrosion protection current between the cathodic protection electrode and a steel material in the concrete structure.
部材によって固定されていることを特徴とする請求項１
記載のコンクリート構造物の電気防食装置。2. The anticorrosion electrode is fixed to the concrete surface by a fixing member.
Cathodic protection device for the concrete structure described.
いて、防食対象のコンクリート表面に、電気防食電極保
持部材を固定した後に、該電気防食電極保持部材中に電
気防食電極を配置し固定し、その後に電気防食電極保持
部材中に充填材を塗布あるいは注入によって充填し、コ
ンクリート構造物の鋼材と電気防食電極との間に防食電
流を通電することを特徴とするコンクリート構造物の電
気防食方法。3. A method of cathodic protection for a concrete structure, comprising fixing an electrocorrosion electrode holding member to a concrete surface to be anticorrosion, arranging and fixing the cathodic protection electrode in the electrocorrosion electrode holding member, and thereafter, A cathodic protection method for a concrete structure, characterized in that a filling material is applied or filled into a holding member for the cathodic protection electrode, and a corrosion current is passed between a steel material of the concrete structure and the cathodic electrode.
いて、防食対象のコンクリート表面に、内部に電気防食
電極を備えた電気防食電極保持部材を固定した後に、該
電気防食電極保持部材中に充填材を塗布あるいは注入に
よって充填し、コンクリート構造物の鋼材と電気防食電
極との間に防食電流を通電することを特徴とするコンク
リート構造物の電気防食方法。4. A method of cathodic protection for a concrete structure, comprising fixing a cathodic protection electrode holding member having a cathodic protection electrode therein to a surface of concrete to be anticorrosion, and then filling a filler in the cathodic protection electrode holding member. A method for cathodic protection of a concrete structure, which comprises filling by coating or pouring, and passing an anticorrosion current between the steel material of the concrete structure and the cathodic protection electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000202624A JP3403152B2 (en) | 2000-07-04 | 2000-07-04 | Apparatus and method for cathodic protection of concrete structures |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000202624A JP3403152B2 (en) | 2000-07-04 | 2000-07-04 | Apparatus and method for cathodic protection of concrete structures |
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| Publication Number | Publication Date |
|---|---|
| JP2002020886A JP2002020886A (en) | 2002-01-23 |
| JP3403152B2 true JP3403152B2 (en) | 2003-05-06 |
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ID=18700120
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|---|---|---|---|
| JP2000202624A Expired - Lifetime JP3403152B2 (en) | 2000-07-04 | 2000-07-04 | Apparatus and method for cathodic protection of concrete structures |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009235512A (en) * | 2008-03-27 | 2009-10-15 | Sumitomo Osaka Cement Co Ltd | Method for deciding spacing in installment of anode for electrical protection, and electrode device used therefor |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7905993B2 (en) * | 2007-11-20 | 2011-03-15 | Miki Funahashi | Corrosion control method and apparatus for reinforcing steel in concrete structures |
| JP5424127B2 (en) * | 2010-09-24 | 2014-02-26 | 住友大阪セメント株式会社 | Method of attaching an anticorrosion electrode to a concrete structure, and concrete structure |
| JP2024055097A (en) * | 2022-10-06 | 2024-04-18 | 株式会社ケミカル工事 | Method for installing an anode for cathodic protection and structure for cathodic protection |
| JP7808564B2 (en) * | 2023-01-12 | 2026-01-29 | 株式会社エステック | Cathodic protection method for concrete structures |
-
2000
- 2000-07-04 JP JP2000202624A patent/JP3403152B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009235512A (en) * | 2008-03-27 | 2009-10-15 | Sumitomo Osaka Cement Co Ltd | Method for deciding spacing in installment of anode for electrical protection, and electrode device used therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002020886A (en) | 2002-01-23 |
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