JP3419552B2 - Monitoring method of electrochemical treatment - Google Patents
Monitoring method of electrochemical treatmentInfo
- Publication number
- JP3419552B2 JP3419552B2 JP15765494A JP15765494A JP3419552B2 JP 3419552 B2 JP3419552 B2 JP 3419552B2 JP 15765494 A JP15765494 A JP 15765494A JP 15765494 A JP15765494 A JP 15765494A JP 3419552 B2 JP3419552 B2 JP 3419552B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- current
- electrode
- current value
- short circuit
- 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
- 238000011282 treatment Methods 0.000 title claims description 31
- 238000000034 method Methods 0.000 title claims description 21
- 238000012544 monitoring process Methods 0.000 title 1
- 239000004567 concrete Substances 0.000 claims description 49
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 description 15
- 238000012545 processing Methods 0.000 description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 229920003043 Cellulose fiber Polymers 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical class [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000011866 long-term treatment Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋼材を内部に含むコン
クリートの電気化学的処理方法の処理中の短絡の有無及
び短絡箇所が存在する領域を調べる方法に関し、特に、
コンクリートに対し安定した処理が行われているかどう
かを調べる方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the presence or absence of a short circuit during the electrochemical treatment of concrete containing steel.
And the method of checking the area where the short circuit exists ,
The present invention relates to a method for checking whether or not stable treatment is performed on concrete.
【０００２】[0002]
【従来の技術とその課題】コンクリートは、一般には、
種々の環境に対する抵抗性が強く、また、強アルカリ性
であるので、その内部にある鋼材は、鋼材表面に不動態
被膜を形成して腐食から保護され、そのために、コンク
リート構造物は耐久性のある永久構造物であると考えら
れてきた。しかしながら、この永久構造物と考えられて
きたコンクリート構造物も、中性化や塩害などの原因に
よりその耐久性が低下し、構造物としての寿命に疑問が
投げかけられるようになってきた。このような劣化した
コンクリート構造物を補修する方法として、電気化学的
な手法を用いた補修工法が開示されている（特開平１−
176287号公報、特開平２−302384号公報）。[Prior art and its problems] Concrete is generally
Due to its strong resistance to various environments and its strong alkalinity, the steel material inside it is protected from corrosion by forming a passivation film on the steel surface, which makes the concrete structure durable. It has been considered to be a permanent structure. However, the durability of the concrete structure, which has been considered to be a permanent structure, is lowered due to causes such as neutralization and salt damage, and the life of the structure has been questioned. As a method for repairing such a deteriorated concrete structure, a repairing method using an electrochemical method has been disclosed (Japanese Patent Laid-Open No. 1-1990).
176287, JP-A-2-302384).
【０００３】これらの方法を用いて、コンクリートの改
質処理を行う場合、処理期間としてかなり長い時間が必
要であり、その処理効果の良否も処理期間が終了するま
でわからない。例えば、コンクリートから塩分を除去す
る方法では、その処理期間の２〜３ヶ月が経過した時点
で、コンクリート中の塩分量を測定する。従って、処理
期間中に、工事の不手際等で処理方法が不良であって
も、そのことが判明するまで２〜３ヶ月の時間が必要で
あった。よって、工事や処理の初期段階で、処理方法の
良否を判断する方法を開発することが重要であった。When modifying the concrete using these methods, a considerably long processing period is required, and the quality of the processing effect is not known until the processing period ends. For example, in the method of removing salt from concrete, the amount of salt in the concrete is measured when a few months of the treatment period have passed. Therefore, during the processing period, even if the processing method is defective due to construction failure or the like, it takes 2 to 3 months until it becomes clear. Therefore, it was important to develop a method for judging the quality of the treatment method at the initial stage of construction and treatment.
【０００４】また、コンクリートに電気を流す電気化学
的処理方法において、処理方法が不良になる最大の原因
は、通電する電流の短絡（陽極と陰極との短絡）であ
る。この短絡現象は、コンクリート表面と内部鉄筋との
間に電気を流す場合、電流がコンクリート表面を不均一
に流れることにより、部分的な短絡が発生する。このよ
うな部分的な短絡が発生した場合、短絡している付近の
コンクリートは電気化学的処理が行われるが、それ以外
の大部分のコンクリートは全く処理が行われないことに
なり、しかも、そのことが判明するまでに２〜３ヶ月要
するという課題があった。Further, in the electrochemical treatment method in which electricity is applied to concrete, the biggest cause of the defective treatment method is a short circuit of a current to be applied (a short circuit between an anode and a cathode). In the short-circuit phenomenon, when electricity is passed between the concrete surface and the internal rebar, a partial short-circuit occurs due to uneven current flow on the concrete surface. When such a partial short circuit occurs, the concrete in the vicinity of the short circuit is electrochemically treated, but most of the other concrete is not treated at all, and There was a problem that it took 2-3 months until it became clear.
【０００５】本発明者らは、このような部分的な短絡を
早期に発見することにより、電気化学的処理方法の良否
を初期の段階で判断し、迅速に対応をすることにより、
絶えず安定した処理効果を得られるようにするために種
々の検討と試験を行なった結果、特定の方法を採用する
ことにより、前記課題を解消することが可能となり、本
発明を完成するに至った。The inventors of the present invention find out such a partial short circuit at an early stage, judge the quality of the electrochemical treatment method at an early stage, and promptly take measures.
As a result of conducting various studies and tests in order to constantly obtain a stable treatment effect, by adopting a specific method, it becomes possible to solve the above problems, and the present invention has been completed. .
【０００６】[0006]
【課題を解決するための手段】即ち、本発明は、（１）
コンクリートの表面部に電極を設置し、該電極を用いて
コンクリート内部に電流を印加する処理方法において、
コンクリートに設置されたプラス電極上に複数の接続点
を設置し、該接続点によって囲まれた領域と、鉄筋に接
続されたマイナス極の間に流れる電流値を検出すること
を特徴とする電気化学的処理における短絡の有無及び短
絡箇所が含まれる領域を調べる方法。（２）電流供給点
からの距離に応じた電流値を検出することを特徴とする
短絡の有無及び短絡箇所が存在する領域を調べる方法で
ある。Means for Solving the Problems That is, the present invention provides (1)
An electrode is placed on the surface of concrete, and in the treatment method of applying an electric current to the inside of concrete using the electrode,
An electrochemical characterized in that a plurality of connection points are installed on a positive electrode installed on concrete, and an electric current value flowing between a region surrounded by the connection points and a negative electrode connected to a reinforcing bar is detected. Presence or absence of short-circuit in static processing
How to find the area that contains the entanglement . (2) Characteristic of detecting a current value according to the distance from the current supply point
This is a method of checking the presence or absence of a short circuit and the region where the short circuit location exists .
【０００７】以下、本発明を詳細に説明する。コンクリ
ートの電気化学的処理方法の一例の模式図を図１に示
す。コンクリート１の表面に電解質溶液とその保持材４
を仮設し、さらに、その中に電極３を有するように設置
する。この電極３をプラス極に、鉄筋２をマイナス極に
なるように電源５に接続し、所定の電流値を出力するこ
とにより、電気化学的処理を行う。この場合、電源５か
ら出力される電流値は、処理対象のコンクリート表面に
均一に電流が流れることを前提として、（必要電流密
度）×（コンクリートの表面積）アンペアの電流値が出
力される。従って、コンクリート表面に均一に電流が流
れておれば、コンクリート表面全体に必要量の電流値が
供給されることになるが、不均一に電流が流れておれ
ば、電流値が不足する部分を生じる。The present invention will be described in detail below. FIG. 1 shows a schematic diagram of an example of an electrochemical treatment method for concrete. Electrolyte solution and its holding material 4 on the surface of concrete 1
Is temporarily installed, and is further installed so as to have the electrode 3 therein. The electrode 3 is connected to the positive electrode and the reinforcing bar 2 is connected to the power source 5 so as to be the negative electrode, and a predetermined current value is output to perform an electrochemical treatment. In this case, the current value output from the power source 5 is a current value of (required current density) × (surface area of concrete) ampere on the assumption that the current uniformly flows on the concrete surface to be treated. Therefore, if the current flows uniformly on the concrete surface, the required amount of current value will be supplied to the entire concrete surface, but if the current flows unevenly, there will be a portion where the current value is insufficient. .
【０００８】図２は、電源５から出された電線が電極３
と接続されている状況を示している。通常は、電極３は
いくつかの分電盤６を通して複数箇所の接続点を有して
いる。従って、電極３は複数箇所の接続点を経由して、
電流を供給されているため、電極３内を流れる電流は複
雑な動きをしているので、この状態で電極３内の電流分
布を調べても意味はない。よって、本発明において、電
極３内の電流値の測定時には、図２に示すように電極３
は１つの分電盤６からのみ電流を供給されるようにしな
ければならない。すなわち、２つ目以降の分電盤６から
の供給を一時的にＯＦＦにする必要がある。図２におい
て、２つ目以降の分電盤６を点線で表しているのは、一
時的にＯＦＦにした状態を示している。また、この場
合、分電盤６からの接続点は、電極３の縦横いずれかの
ほぼ直線上になる点であることが好ましい。電極３は１
つの分電盤６からのみ電流を供給されるようにしてか
ら、電極３の長さ、または、幅方向に沿って等間隔（図
２ではＬ）毎の計測線を通過する電流値を検出すること
により、コンクリートに均一な処理がされているかどう
かがわかる。In FIG. 2, the electric wire emitted from the power source 5 is the electrode 3
It shows the situation that is connected with. Normally, the electrode 3 has a plurality of connection points through several distribution boards 6. Therefore, the electrode 3 is connected via a plurality of connection points,
Since the current is supplied, the current flowing in the electrode 3 makes a complicated movement. Therefore, it is meaningless to examine the current distribution in the electrode 3 in this state. Therefore, in the present invention, when measuring the current value in the electrode 3, as shown in FIG.
Must be supplied with current from only one distribution board 6. That is, it is necessary to temporarily turn off the supply from the second and subsequent distribution boards 6. In FIG. 2, the second and subsequent distribution boards 6 are shown by dotted lines to indicate a state in which they are temporarily turned off. Further, in this case, it is preferable that the connection point from the distribution board 6 is a point on the electrode 3 which is on a substantially straight line which is either vertical or horizontal. Electrode 3 is 1
After the electric current is supplied only from one distribution board 6, the current value passing through the measurement line at equal intervals (L in FIG. 2) along the length of the electrode 3 or the width direction is detected. This makes it possible to know whether or not the concrete has been uniformly treated.
【０００９】コンクリートに均一な処理がされている場
合、電極３のABba、BCcb、CDdc、DEed、EFfe等に囲まれ
た各部分(以下、領域と呼ぶ)の面積は等しいから、各部
分からコンクリート表面に流れる電流値もほぼ等しい値
となる。従って、１番目の計測線Aaを通過する電流値、
すなわち、分電盤６から供給される電流値をＰとし、AB
ba、BCcb、CDdc、DEed、EFfe等の各部分からコンクリー
ト表面に流れる電流値をαとすると、２番目の計測線Bb
を通過する電流値はＰ−α、３番目の計測線Ccを通過す
る電流値はＰ−２×α、４番目の計測線Ddを通過する電
流値はＰ−３×αとなる。従って、ｎ番目の計測線を通
過する電流値をｆ(n) とすると、When the concrete is uniformly treated, the areas of the electrodes 3 surrounded by ABba, BCcb, CDdc, DEed, EFfe, etc. (hereinafter referred to as "areas") are equal, so that the concrete is processed from each area. The value of the current flowing on the surface is also almost equal. Therefore, the current value passing through the first measurement line Aa,
That is, the current value supplied from the distribution board 6 is P, and AB
Let α be the value of the current flowing from the ba, BCcb, CDdc, DEed, and EFfe parts to the concrete surface.
Is P-α, the current value passing through the third measurement line Cc is P-2 × α, and the current value passing through the fourth measurement line Dd is P-3 × α. Therefore, if the current value passing through the n-th measurement line is f (n),
【数１】
となる。よって、各計測線を通過する電流値がほぼ数１
を満たしていれば、コンクリートがほぼ均一に処理され
ていると判断できる。なお、コンクリートの電気化学的
処理においては、通常コンクリートの表面積当たり１A/
m2の電流を電源より出力しているから、[Equation 1] Becomes Therefore, the current value passing through each measurement line is approximately
If the condition is satisfied, it can be determined that the concrete is treated almost uniformly. In electrochemical treatment of concrete, the surface area of the concrete is usually 1 A /
Since the current of m 2 is output from the power supply,
【数２】
となる。コンクリートの電気化学的処理が順調に行われ
ているかどうかの判断基準としては、数１を変形して、
ｆ(n) −ｆ(n+1) ＝αn となるαn が[Equation 2] Becomes As a criterion for judging whether or not the electrochemical treatment of concrete is being carried out smoothly, the formula 1 is transformed into
f (n) -f (n + 1) = α n become alpha n is
【数３】
を満たしておれば、最低限の電気化学的処理が行われて
いると判断して良い。すなわち、コンクリートの表面積
当たり０. ５A/m2以上の電流が電極３からコンクリート
に流れておれば、電気化学的処理が行われる。なお、n
は電極３の長さ方向に計測線の間隔Ｌで割った値の整数
部分である。[Equation 3] If the above condition is satisfied, it can be determined that the minimum electrochemical treatment is performed. That is, if a current of 0.5 A / m 2 or more per surface area of concrete flows from the electrode 3 to the concrete, the electrochemical treatment is performed. Note that n
Is the integer part of the value divided by the distance L between the measurement lines in the length direction of the electrode 3.
【００１０】なお、このような電流値の確認は、電気化
学的処理の開始後、直ちに行うことが好ましいが、相当
時間が経過してから行っても良い。さらに、処理時間の
経過とともに、繰り返し確認をすることが、一層好まし
い。また、このような確認を行った時点で、数３を満た
さない箇所が発見された場合、その電極３のいずれかの
場所から余分に電流が流れている。その部分は、通常電
極３のαn の大きな部分であると考えることができる。
従って、電極３自身を取り替えるか、または、そのαn
の大きな部分のみを付け替えて、下地処理を再度行うこ
とにより電気化学的処理を順調に行うことができる。It should be noted that such confirmation of the current value is preferably carried out immediately after the start of the electrochemical treatment, but may be carried out after a considerable time has elapsed. Furthermore, it is more preferable that the confirmation be repeated with the lapse of processing time. In addition, if a portion that does not satisfy Equation 3 is found at the time of such confirmation, an extra current is flowing from any portion of the electrode 3. That part can be considered to be a part where the α n of the normal electrode 3 is large.
Therefore, the electrode 3 itself may be replaced or its α n
It is possible to smoothly carry out the electrochemical treatment by replacing only the large part of the base material and performing the base treatment again.
【００１１】本発明の（１）による計測線を通過する電
流値ｆ(n) をＹ軸に、分電盤６と電極３との接続位置か
らの距離をＸ軸にして、電流値をプロットする、および
／または、それらの点を線で結ぶ。なお、電流値ｆ(n)
をＸ軸、距離をＹ軸としてもかまわない。The current value f (n) passing through the measurement line according to (1) of the present invention is plotted on the Y-axis, and the distance from the connection position of the distribution board 6 and the electrode 3 is plotted on the X-axis. And / or connect the points with a line. The current value f (n)
May be used as the X axis and the distance as the Y axis.
【００１２】図３は、電流値をプロットし、それらを結
んだ線が理想的な処理が行われている場合を示してい
る。図４は、計測線のBbとCc間で電流値が大きく減少し
ており、α2 が他の部分と較べて大変大きいことがわか
る。その結果、電流値は計測線Eeまでしか届かず、電極
３のEFfeの部分には電流が流れていないことが判別でき
る。よって、電極３のBCcb部分を調べ、電流値が余分に
流れる原因を除去すれば、点線で示したように電極３の
EFfeの部分にも必要な電流を供給できることが容易にわ
かる。図５は、計測線のCcとDd間で電流値が急激に減少
しており、α3 が大変大きいことがわかる。この状態で
は、計測線Ddから先には必要な電流が流れていない。
従って、図４と同様に電極３のCDdc部分を調べ、短絡の
原因を除去すれば、計測線Ddから先に必要な電流量を供
給することができる。FIG. 3 shows a case where the current values are plotted and the line connecting them is subjected to ideal processing. In FIG. 4, it can be seen that the current value greatly decreases between Bb and Cc of the measurement line, and α 2 is very large compared to other portions. As a result, the current value reaches only the measurement line Ee, and it can be determined that no current flows in the EFfe portion of the electrode 3. Therefore, if the BCcb part of the electrode 3 is examined and the cause of the excess current value is removed, as shown by the dotted line,
It is easy to see that the necessary current can be supplied to the EFfe part. In FIG. 5, it can be seen that the current value sharply decreases between Cc and Dd of the measurement line, and α 3 is very large. In this state, the necessary current does not flow from the measurement line Dd ahead.
Therefore, if the CDdc portion of the electrode 3 is examined in the same manner as in FIG. 4 and the cause of the short circuit is removed, the required amount of current can be supplied first from the measurement line Dd.
【００１３】なお、電流供給点からの距離に応じた電流
値を検出する第２発明においては、電極３の計測線の区
間を等距離に限定する必要はなく、計測区間の長さが異
なっていても良い。最後に、本発明を分かりやすく説明
するために、図２から図５において、分電盤６からの電
極３への接続位置を計測線Aaとしたが、接続位置が電極
３の端部に限定されるわけではなく、計測線Bb、Cc等ど
の位置であっても差し支えなく、本説明と同様の方法に
て短絡箇所を調べることができる。In the second invention for detecting the current value according to the distance from the current supply point, it is not necessary to limit the section of the measuring line of the electrode 3 to the equal distance, and the length of the measuring section is different. May be. Finally, in order to explain the present invention in an easy-to-understand manner, the connection position from the distribution board 6 to the electrode 3 is set to the measurement line Aa in FIGS. 2 to 5, but the connection position is limited to the end portion of the electrode 3. No matter what position the measurement lines Bb, Cc, etc. are, it is possible to check the short-circuited portion by the same method as this description.
【００１４】[0014]
【実施例】以下、本発明を実施例により具体的に説明す
るが、本発明はこれら実施例には限定されるものではな
い。
実施例１
高さ１. ５ｍ、長さ２０ｍ、厚さ３０cmの鉄筋コンクリ
ートの壁を用いて電気化学的処理を行った。この壁のコ
ンクリートは、海砂を使用していたために、コンクリー
ト内に多量の塩分が存在し、その結果として、鉄筋の腐
食が発生していた。よって、電気化学的処理の１つであ
る脱塩処理を行った。EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. Example 1 An electrochemical treatment was carried out using a reinforced concrete wall having a height of 1.5 m, a length of 20 m and a thickness of 30 cm. Since the concrete of this wall used sea sand, a large amount of salt was present in the concrete, resulting in corrosion of the reinforcing bars. Therefore, desalting treatment, which is one of the electrochemical treatments, was performed.
【００１５】図１に示すように、電解質溶液とその保持
材４には、飽和水酸化カルシウム水溶液、および、セル
ロースファイバーを、電極３には、幅１. ２ｍで長さ２
０ｍのチタンメッシュを用いて、鉄筋２との間に直流電
流を流した。チタンメッシュには、２ｍ間隔に電線で分
電盤６と接続し、電流を供給した。通電開始翌日、一番
端の分電盤のみをＯＮ、他をＯＦＦとして、チタンメッ
シュに流れる電流値を端部から５０cm間隔にて測定し
た。距離をＸ軸、電流値をＹ軸として、ＸＹグラフにプ
ロットしたところ、端部から１１. ５ｍまでは電流値が
ほぼ一定の値で減少し、チタンメッシュからコンクリー
トへとほぼ一定の割合の電流が流れ、脱塩処理が行えて
いることがわかった。As shown in FIG. 1, a saturated calcium hydroxide aqueous solution and cellulose fiber are used as the electrolyte solution and the supporting material 4 thereof, and the electrode 3 has a width of 1.2 m and a length of 2 mm.
A direct current was passed between the rebar 2 and a 0 m titanium mesh. The titanium mesh was connected to the distribution board 6 with an electric wire at intervals of 2 m to supply an electric current. On the day after the start of energization, only the distribution board at the end was turned on and the others were turned off, and the current value flowing through the titanium mesh was measured at 50 cm intervals from the end. When plotted on an XY graph with the distance as the X-axis and the current value as the Y-axis, the current value decreases at a constant value from the end to 11.5 m, and the current from the titanium mesh to the concrete remains at a constant rate. It was found that the desalination process was performed.
【００１６】しかし、１２ｍの位置で電流が大幅に低下
し、１２ｍから先にはほとんど流れていないことが判明
した。これは、１１. ５〜１２ｍの間で、何らかの原因
で短絡現象が起こっているのもと判断できた。よって、
１１. ５〜１２ｍの間のチタンメッシュを切断し、セル
ロースファイバーとともに、コンクリート表面から除去
した。１１. ５〜１２ｍ間のコンクリート表面を丹念に
調査したところ、コンクリート打設時の型枠を支える金
属製セパレータがコンクリート表面にあり、しかも、こ
のセパレータと鉄筋２との電気抵抗値が非常に小さいこ
とが判明した。この結果、電流はチタンメッシュ、セパ
レータから鉄筋２へと流れ、短絡していた。そこで、こ
のセパレータに絶縁処理を行い、再度、その部分に飽和
水酸化カルシウム水溶液、セルロースファイバー、およ
び、チタンメッシュを設置して、電流値を調べたとこ
ろ、端部から２０ｍの位置までほぼ一定の値で減少でき
るようになった。この状態で８週間の電気化学的処理を
行ったところ、コンクリート中の含有塩分量は処理前の
１／４にまで低下しており、目的を十分に果たすことが
できた。However, it was found that the current dropped significantly at the position of 12 m, and almost no current flowed from 12 m onward. This could be judged from the fact that the short circuit phenomenon occurred for some reason between 11.5 and 12 m. Therefore,
11. Titanium mesh between 5 and 12 m was cut and removed from the concrete surface with the cellulose fibers. 11. A careful examination of the concrete surface between 5 and 12 m reveals that the concrete surface has a metallic separator that supports the formwork when placing concrete, and the electric resistance between this separator and the reinforcing bar 2 is very small. It has been found. As a result, the electric current flowed from the titanium mesh and the separator to the reinforcing bar 2 to cause a short circuit. Therefore, the separator was subjected to insulation treatment, and saturated calcium hydroxide aqueous solution, cellulose fiber, and titanium mesh were again installed in that portion, and the current value was examined. You can now decrease the value. When electrochemical treatment was carried out for 8 weeks in this state, the amount of salt content in the concrete was reduced to 1/4 of that before the treatment, and the purpose could be sufficiently fulfilled.
【００１７】なお、比較として１１. ５〜１２ｍ間の短
絡部分を発見せず、そのまま電気化学的処理を行った場
合、コンクリート中の含有塩分量の減少は余り期待でき
ず、目的を果たすことができなかった。しかも、目的を
果たすことができなかったことが判明するのが、約２ヶ
月後であり、もうその時は工事終了時であった。As a comparison, when the short-circuit portion between 11.5 to 12 m is not found and the electrochemical treatment is carried out as it is, the reduction of the salt content in the concrete cannot be expected so much and the purpose can be achieved. could not. Moreover, it turned out about two months later that it was not possible to accomplish the purpose, and it was at the end of the construction.
【００１８】[0018]
【発明の効果】本発明では、コンクリートに電気化学的
処理を行う場合、電流の短絡箇所が存在する領域を調べ
ることが可能であり、その結果、短絡部の再処理ができ
る。また、初期の段階で調査すれば、コンクリートの処
理が正しく行われているかどうかを判別することができ
るので、長期間にわたる処理であっても、安定した処理
ができる。従って、従来のように、処理期間終了時ま
で、処理がうまく行われているかどうかわからないとい
う課題が解決できる。According to the present invention, when the concrete is subjected to the electrochemical treatment, it is possible to examine the region where the short circuit portion of the current exists , and as a result, the short circuit portion can be retreated. In addition, since it is possible to determine whether or not the concrete is being treated correctly by conducting an investigation at an early stage, it is possible to perform a stable treatment even for a long-term treatment. Therefore, as in the conventional case, it is possible to solve the problem that it is not known whether or not the processing is successfully performed until the end of the processing period.
【図１】コンクリートに電気化学的処理を行う１例の模
式図である。FIG. 1 is a schematic view of an example of performing an electrochemical treatment on concrete.
【図２】電源から出ている電線が電極と接続されている
モデル図であり、電極に流れる電流を計測するための説
明図である。FIG. 2 is a model diagram in which an electric wire from a power source is connected to an electrode, and an explanatory diagram for measuring a current flowing through the electrode.
【図３】距離と電流値をプロットしたＸＹグラフであ
り、順調に処理が行われているときのものである。FIG. 3 is an XY graph in which a distance and a current value are plotted, and is when the processing is smoothly performed.
【図４】図３と同様のＸＹグラフであるが、部分的に短
絡現象が発生している場合の例である。FIG. 4 is an XY graph similar to FIG. 3, but showing an example in the case where a short circuit phenomenon partially occurs.
【図５】図３と同様のＸＹグラフであるが、部分的に短
絡現象が発生している場合の例である。FIG. 5 is an XY graph similar to FIG. 3, but showing an example in which a short circuit phenomenon partially occurs.
１ コンクリート ２ 鉄筋 ３ 電極 ４ 電解質とその保持材 ５ 電源 ６ 分電盤 1 concrete 2 rebar 3 electrodes 4 Electrolyte and its holding material 5 power supplies 6 distribution board
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 27/26 351 G01N 17/02 B28B 11/00 C04B 41/60 C04B 41/72 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) G01N 27/26 351 G01N 17/02 B28B 11/00 C04B 41/60 C04B 41/72
Claims (2)
該電極を用いてコンクリート内部に電流を印加する処理
方法において、コンクリートに設置されたプラス電極上
に複数の接続点を設置し、該接続点によって囲まれた領
域と、鉄筋に接続されたマイナス極の間に流れる電流値
を検出することを特徴とする電気化学的処理における短
絡の有無及び短絡箇所が存在する領域を調べる方法。1. An electrode is installed on the surface of concrete,
In a treatment method of applying an electric current to the inside of concrete using the electrode, a plurality of connection points are installed on a positive electrode installed on the concrete, and a region surrounded by the connection points and a negative electrode connected to the reinforcing bar. short in an electrochemical process, characterized in that for detecting a current flowing between the
A method to check the presence or absence of a fault and the area where a short circuit exists .
検出することを特徴とする請求項１記載の短絡の有無及
び短絡箇所が存在する領域を調べる方法。2. The presence or absence of a short circuit according to claim 1, wherein the current value is detected according to the distance from the current supply point.
And the method of checking the area where the short circuit exists .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15765494A JP3419552B2 (en) | 1994-07-08 | 1994-07-08 | Monitoring method of electrochemical treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15765494A JP3419552B2 (en) | 1994-07-08 | 1994-07-08 | Monitoring method of electrochemical treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0821816A JPH0821816A (en) | 1996-01-23 |
| JP3419552B2 true JP3419552B2 (en) | 2003-06-23 |
Family
ID=15654458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15765494A Expired - Lifetime JP3419552B2 (en) | 1994-07-08 | 1994-07-08 | Monitoring method of electrochemical treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3419552B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU7138200A (en) | 1999-07-22 | 2001-02-13 | Infrastructure Repair Technologies, Inc. | Method of treating corrosion in reinforced concrete structures by providing a uniform surface potential |
| JP5418858B2 (en) * | 2011-03-17 | 2014-02-19 | 住友大阪セメント株式会社 | Method for detecting short-circuited foreign matter and detection device for short-circuited foreign matter |
-
1994
- 1994-07-08 JP JP15765494A patent/JP3419552B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0821816A (en) | 1996-01-23 |
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