JPH06345512A - Corrosion protective material - Google Patents
Corrosion protective materialInfo
- Publication number
- JPH06345512A JPH06345512A JP5157957A JP15795793A JPH06345512A JP H06345512 A JPH06345512 A JP H06345512A JP 5157957 A JP5157957 A JP 5157957A JP 15795793 A JP15795793 A JP 15795793A JP H06345512 A JPH06345512 A JP H06345512A
- Authority
- JP
- Japan
- Prior art keywords
- repair
- concrete
- cement
- powder
- steel material
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B32/00—Artificial stone not provided for in other groups of this subclass
- C04B32/02—Artificial stone not provided for in other groups of this subclass with reinforcements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/34—Metals, e.g. ferro-silicon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/02—Elements
- C04B22/04—Metals, e.g. aluminium used as blowing agent
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/61—Corrosion inhibitors
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、コンクリート構造物
中の補強鋼材、例えば、桟橋、橋桁、橋床、高架橋など
の鉄筋やＰＣコンクリート構造物のＰＣ鋼材を防食する
ための防食材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced steel material in a concrete structure, for example, an anticorrosive material for corrosion-proofing a reinforcing steel such as a pier, a bridge girder, a bridge floor, an viaduct, or a PC steel material of a PC concrete structure. is there.
【０００２】[0002]
【従来の技術】近年、コンクリート構造物中の補強鋼材
が、細骨材に含まれる塩分や海塩粒子の侵入などによっ
て腐食され、コンクリートにクラックが生じたり、鋼材
とコンクリートとの間に浮きが生じたりすることが問題
となっている。かかるコンクリートにクラックが生じた
り、補強鋼材とコンクリートとの間に浮きが生じたりし
た場合、従来は、図１０に示されるように、これらクラ
ックまたは浮きが生じた部分のコンクリートを除去し、
その部分に新しいセメントを充填固化させて補修部のコ
ンクリート５を形成し補修していた。2. Description of the Related Art In recent years, a reinforcing steel material in a concrete structure is corroded due to intrusion of salt or sea salt particles contained in fine aggregate, causing cracks in the concrete or floating between the steel material and the concrete. Occurrence is a problem. When cracks occur in such concrete or floating occurs between the reinforcing steel material and the concrete, conventionally, as shown in FIG. 10, the concrete in the portion where these cracks or floating has occurred is removed,
The portion was filled with new cement and solidified to form the concrete 5 of the repaired portion for repairing.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、図１０
に示されるような部分的な補修では、非補修部２のコン
クリート３は塩分を含んでおり、一方、補修部１のコン
クリート５は塩分を殆ど含んでいないとことから、塩分
を含有している非補修部２と塩分を殆ど含んでいない補
修部１とが隣接し、非補修部補強鋼材４と補修部補強鋼
材４′との間に電位差が生じるようになる。その結果、
非補修部補強鋼材４がアノード、補修部補強鋼材４′カ
ソードとなるマクロセルを形成し、非補修部補強鋼材４
から補修部補強鋼材４′へ腐食電流ｉが流れ、特に補修
部補強鋼材４′近傍の非補修部補強鋼材４が著しく腐食
したり、腐食を促進されるという問題があった。また、
補修部１のコンクリート５は、補修当時は塩分を殆ど含
有していないが、塩分等の腐食因子の侵入により、補修
部補強鋼材４′が比較的短期間で腐食するという問題も
あった。However, as shown in FIG.
In the partial repair as shown in Fig. 1, the concrete 3 of the non-repair part 2 contains salt, while the concrete 5 of the repair part 1 contains almost no salt, and thus contains salt. The non-repair portion 2 and the repair portion 1 containing almost no salt are adjacent to each other, and a potential difference is generated between the non-repair portion reinforcing steel material 4 and the repair portion reinforcing steel material 4 '. as a result,
The non-repair part reinforcement steel 4 forms an anode and the repair part reinforcement steel 4'cathode forms a macrocell, and the non-repair part reinforcement steel 4
There is a problem that the corrosion current i flows from the to the repair portion reinforcing steel material 4 ', and particularly the non-repair portion reinforcing steel material 4 near the repair portion reinforcing steel material 4'is significantly corroded or promoted. Also,
Although the concrete 5 of the repair part 1 contains almost no salt at the time of repair, there is a problem that the repair part reinforcing steel material 4'corrodes in a relatively short period of time due to the intrusion of a corrosion factor such as salt.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者らは、
上記の問題点を解消すべく、鋭意研究を行った結果、セ
メントに犠牲陽極作用を有する金属粉末を重量比で６０
〜９５％含有してなる防食材を補修時に用いることによ
って、マクロセル腐食が防止されるとともに補強鋼材を
長期間にわたって防食できるという知見を得たのであ
る。この発明は、かかる知見にもとづいてなされたもの
であって、セメントに犠牲陽極作用を有する金属粉末を
重量比で６０〜９５％含有してなる防食材に特徴を有す
るものである。Therefore, the present inventors have
As a result of earnest research to solve the above problems, a metal powder having a sacrificial anode action in the cement was mixed in a weight ratio of 60.
By using an anticorrosive material containing ~ 95% at the time of repair, it was found that macrocell corrosion can be prevented and the reinforcing steel can be protected for a long period of time. The present invention has been made on the basis of such findings, and is characterized by an anticorrosive material containing 60 to 95% by weight of a metal powder having a sacrificial anode action in cement.
【０００５】この発明の防食材に使用するセメントは、
いかなるセメントでもよいが、特にＪＩＳ Ｒ ５２１
０で規定されるポルトランドセメントが好ましい。また
前記セメントに天然ゴムまたは合成ゴム、合成樹脂ある
いはそのモノマー（単量体）などを用いた水溶性または
親水性のポリマー（エマルジョンまたはラテックスの形
態）を水の代りに添加したポリマーセメントも使用する
ことができる。このポリマーセメントは市販されている
ものでよい。前記犠牲陽極作用を有する金属粉末として
は、Ｚｎ粉末、Ａｌ粉末、Ｍｇ粉末等が用いられるが、
その中でもＺｎ粉末が最も好ましい。なお、防食材に対
する水またはポリマーの配合比としては、セメントがポ
ルトランドセメントの場合は重量比で防食材（セメント
＋金属粉末）：水＝１：０．０５〜０．５で、好ましく
は１：０．１〜０．３が良い。セメントがポリマーセメ
ントの場合は水の代りにポリマーを用い、重量比で防食
材（セメント＋金属粉末）：ポリマー＝１：０．０５〜
０．５で、好ましくは１：０．１〜０．３が良い。The cement used for the anticorrosive material of the present invention is
Any cement can be used, especially JIS R 521
Portland cement defined by 0 is preferred. Further, a polymer cement obtained by adding a water-soluble or hydrophilic polymer (in the form of emulsion or latex) using natural rubber or synthetic rubber, synthetic resin or a monomer thereof to the cement instead of water is also used. be able to. The polymer cement may be commercially available. As the metal powder having the sacrificial anode action, Zn powder, Al powder, Mg powder, etc. are used.
Among them, Zn powder is the most preferable. When the cement is Portland cement, the compounding ratio of water or polymer to the anti-food material is a weight ratio of anti-food material (cement + metal powder): water = 1: 0.05 to 0.5, preferably 1: 0.1 to 0.3 is good. When the cement is a polymer cement, a polymer is used instead of water, and the weight ratio of food-proof material (cement + metal powder): polymer = 1: 0.05-
It is 0.5, preferably 1: 0.1 to 0.3.
【０００６】これら犠牲陽極作用を有する金属粉末をセ
メントに重量比で６０〜９５％の割合で含有することに
より、本発明の防食材を得ることができる。前記犠牲陽
極作用を有する金属粉末の含有割合が、重量比で６０％
未満であると十分な防食効果を得ることができない。一
方、９５％を越えて含有されるとセメント量が少なくな
り、コンクリートや鋼材との付着性が低下するので、好
ましくない。ゆえに、犠牲陽極作用を有する金属粉末の
含有割合は重量比で６０〜９５％と定めた。By containing the metal powder having the sacrificial anode action in the cement in a weight ratio of 60 to 95%, the anticorrosive material of the present invention can be obtained. The content ratio of the metal powder having the sacrificial anode function is 60% by weight.
If it is less than this, a sufficient anticorrosion effect cannot be obtained. On the other hand, if the content exceeds 95%, the amount of cement becomes small and the adhesion to concrete and steel materials decreases, which is not preferable. Therefore, the content ratio of the metal powder having a sacrificial anode action is set to 60 to 95% by weight.
【０００７】[0007]
【作用】このような犠牲陽極作用を有する金属粉末を含
有してなるこの発明の防食材を補修部に充填するか、補
修部の鋼材表面の一部あるいは全部に塗布することによ
って、前記犠牲陽極作用を有する金属粉末が補修部及び
非補修部の鋼材に対して犠牲陽極として作用して、それ
ぞれの鋼材に防食電流を供給するので、マクロセル腐食
が防止できるとともに前記鋼材に長期間にわたって防食
できるのである。The sacrificial anode is prepared by filling the anticorrosive material of the present invention containing the metal powder having the sacrificial anode action in the repair portion or by coating the steel material surface of the repair portion partially or entirely. Since the metal powder having the action acts as a sacrificial anode for the steel material in the repaired portion and the non-repaired portion and supplies a corrosion protection current to each steel material, macrocell corrosion can be prevented and the steel material can be protected for a long period of time. is there.
【０００８】次に、この発明の防食材の使用方法を図面
に基づいて具体的に説明する。図１、図２および図３
は、この発明の防食材を用いて鉄筋コンクリートの一部
を補修した状態の断面概略図であり、図１、図２および
図３において、１は補修部、２は非補修部、３は非補修
部のコンクリート、４は非補修部補強鋼材、４′は補修
部補強鋼材、５は補修部のコンクリート、６は防食材層
である。図１、図２または図３に示されるような補修部
１は、まず、補修部補強鋼材４′が露出するまでコンク
リートをはつって取り除き、補修部補強鋼材４′が錆び
ている場合には、その全ての錆を取り除くことが好まし
いが、少なくとも防食材層６と接する部分の錆を取り除
けばよい。しかる後、前記防食材層６を図１に示される
ように補修部補強鋼材４′に一部形成してもよく、図２
に示されるように一部充填してもよく、または図３に示
されるように補修部補強鋼材４′が全面被覆されるよう
に充填してもよい。前記防食材層６を上述の如く形成ま
たは充填したのち、補修部のコンクリート５を充填して
補修部１が完成する。かかる補修部１においては、防食
材層６に含まれる金属粉末が補修部補強鋼材４′および
非補修部補強鋼材４に対して共に犠牲陽極として作用
し、各々の補強鋼材４′および４に防食電流Ｉが供給さ
れ、腐食電流ｉと相殺されてマクロセルが形成されず防
食することができる。Next, a method of using the anticorrosive material of the present invention will be specifically described with reference to the drawings. 1, 2 and 3
FIG. 1 is a schematic cross-sectional view of a state in which a part of reinforced concrete is repaired using the anticorrosive material of the present invention. In FIGS. 1, 2, and 3, 1 is a repair part, 2 is a non-repair part, and 3 is a non-repair part. Part concrete, 4 is a non-repair part reinforcing steel, 4'is a repair part reinforcing steel, 5 is a repair part concrete, and 6 is an anticorrosion layer. In the repair section 1 as shown in FIG. 1, FIG. 2 or FIG. 3, first, the concrete is removed by removing the concrete until the repair section reinforcing steel material 4 ′ is exposed, and when the repair section reinforcing steel material 4 ′ is rusted, However, it is preferable to remove all the rust, but it is sufficient to remove at least the part in contact with the anti-food material layer 6. After that, the anti-corrosion material layer 6 may be partially formed on the repaired portion reinforcing steel material 4'as shown in FIG.
2 may be partially filled, or as shown in FIG. 3, the repaired portion reinforcing steel material 4'may be entirely filled. After forming or filling the anti-corrosion material layer 6 as described above, the repair portion 1 is completed by filling the concrete 5 of the repair portion. In the repair part 1, the metal powder contained in the anticorrosion material layer 6 acts as a sacrificial anode on both the repaired portion reinforcing steel member 4 ′ and the non-repaired portion reinforcing steel member 4, and the respective reinforcing steel members 4 ′ and 4 are protected against corrosion. The current I is supplied, and the corrosion current i is offset to prevent the formation of macrocells, thus preventing corrosion.
【０００９】かかる補修部１は、図４に示されるよう
に、海水８の上に建設する桟橋７に施すことができ、さ
らに図５に示されるように、高速道路等の高架橋１５の
橋脚９に施すことができる。なお、１０は車道である。
また、この発明の防食材の別の使用方法として、図６に
示すように、コンクリート３に接続端子板１２を適宜な
間隔で埋め込み、次にコンクリート３表面上に防食材層
６を形成し、この形成した防食材層６をリード線１３に
より補強鋼材１４と電気的に接続し、防食材層６を流電
陽極方式の犠牲陽極材として作用せしめて、補強鋼材１
４を防食することができる。さらに、この防食材層６
は、外部電源方式の電極材として用いることもできる。The repair section 1 can be applied to a jetty 7 constructed on seawater 8 as shown in FIG. 4, and as shown in FIG. 5, a pier 9 of a viaduct 15 such as an expressway. Can be applied to. In addition, 10 is a roadway.
As another method of using the food protection material of the present invention, as shown in FIG. 6, the connection terminal plates 12 are embedded in the concrete 3 at appropriate intervals, and then the food protection layer 6 is formed on the surface of the concrete 3. The formed anticorrosive material layer 6 is electrically connected to the reinforcing steel material 14 by the lead wire 13, and the anticorrosive material layer 6 is caused to act as a sacrificial anode material of the galvanic anode method to obtain the reinforcing steel material 1.
4 can be anticorrosive. Furthermore, this food protection layer 6
Can also be used as an electrode material for an external power supply system.
【００１０】[0010]
【実施例】鉄筋の一部に塗料を塗布して絶縁層を形成し
た直径：２cm、長さ：２０cmの寸法を有する黒皮付き鉄
筋、ポルトランドセメント、砂、砂利、並びに水を用意
した。上記ポルトランドセメント、砂、砂利および水を
重量比で、ポルトランドセメント：砂：砂利：水＝１：
２：４：０．６となるように配合し、これに塩化物含有
量が１Kg／ｍ3 、５Kg／ｍ3 及び１０Kg/ ｍ3 の三種類
の異なる濃度になるようにそれぞれ食塩を混合し、得ら
れたセメントコンクリートを内径：６cm、高さ１９cmの
型枠に充填し、さらに上記鉄筋を上記セメントコンクリ
ートの中央に挿入したのちセメントコンクリートを固化
させ、図７に示されるような、鉄筋４４の絶縁層１１の
一部がコンクリート３３から露出している鉄筋コンクリ
ート供試体５５を作製した。この鉄筋コンクリート供試
体５５を１ヶ月間大気中に放置し、この間、１日１時間
人工海水中に浸漬した。Example A coating material was applied to a part of the reinforcing bar to form an insulating layer. A black bar reinforcing bar having a diameter of 2 cm and a length of 20 cm, Portland cement, sand, gravel, and water were prepared. By weight ratio of the above Portland cement, sand, gravel and water, Portland cement: sand: gravel: water = 1:
2: 4: 0.6 so that the chloride content is mixed to each of three different concentrations of 1 kg / m 3 , 5 kg / m 3 and 10 kg / m 3. The obtained cement concrete was filled in a formwork having an inner diameter of 6 cm and a height of 19 cm, and the rebar was inserted into the center of the cement concrete, and then the cement concrete was solidified. As shown in FIG. A reinforced concrete specimen 55 having a part of the insulating layer 11 exposed from the concrete 33 was prepared. This reinforced concrete test piece 55 was left in the atmosphere for one month, and during this time, it was immersed in artificial seawater for one hour a day.
【００１１】実施例１ 上記１ヶ月間大気中に放置した鉄筋コンクリート供試体
５５の上半分を補修部とするために割裂し、鉄筋４４を
露出せしめた。一方、ポルトランドセメントにＺｎ粉末
を表１〜表３に示される重量比で配合し混合した本発明
防食材１〜２４および比較防食材１〜１５を用意した。
これら防食材に対する水の配合比は、防食材（セメント
＋Ｚｎ粉末）：水＝１：０．１（重量比）の割合で配合
し混合した。そして図８に示されるように、上記割裂し
露出せしめた鉄筋４４の全表面に０．１cmの厚さに塗布
し、防食材層６を形成し、この防食材層６の上にさらに
セメント：砂：砂利：水＝１：２：４：０．６（重量
比）からなるセメントコンクリートで、元の供試体と同
じ寸法になるように補修し、補修部１および非補修部２
からなる補修体６６を作製した。Example 1 The reinforcing bar 44 was exposed by splitting the upper half of the reinforced concrete specimen 55 that had been left in the atmosphere for the above-mentioned one month to form a repair part. On the other hand, Portland cement was mixed with Zn powder in a weight ratio shown in Tables 1 to 3 to prepare Inventive Inhibitors 1 to 24 and Comparative Inhibitors 1 to 15 prepared.
The compounding ratio of water to these anti-food materials was such that the anti-food materials (cement + Zn powder): water = 1: 0.1 (weight ratio) were mixed and mixed. Then, as shown in FIG. 8, it is applied to the entire surface of the split and exposed rebar 44 to a thickness of 0.1 cm to form an anticorrosion layer 6, and further cement is applied on the anticorrosion layer 6. Cement concrete consisting of sand: gravel: water = 1: 2: 4: 0.6 (weight ratio), repaired to the same size as the original specimen, repaired part 1 and unrepaired part 2
A repair body 66 made of was prepared.
【００１２】これら補修部１および非補修部２からなる
補修体６６を人工海水を満たした容器（図示せず）内に
設置し、上部には蓋（図示せず）を設け、常に湿気のあ
る環境下に６ヶ月間放置したのち、前記容器から取り出
し、補修体６６を再び割裂して鉄筋４４の腐食状態を調
べるとともに防食材６と鉄筋との付着状況を目視および
ハンマー連打することにより観察し、さらに非補修部２
の塩化物含有量も測定し、それらの結果を表１〜表３に
示した。なお比較防食材１〜３はＺｎ粉末が含有されて
いないので、この比較防食材１〜３により得られた補修
部は従来法による補修部に相当するものである。The repairing body 66 consisting of the repairing portion 1 and the non-repairing portion 2 is installed in a container (not shown) filled with artificial seawater, and a lid (not shown) is provided on the upper portion thereof so that the container is always moist. After leaving it in the environment for 6 months, it is taken out of the container, the repair body 66 is split again to check the corrosion state of the reinforcing bar 44, and the adhesion state of the foodstuff 6 and the reinforcing bar is visually and visually struck by hammering. , Further non-repair department 2
Was also measured, and the results are shown in Tables 1 to 3. Since the comparative anti-food materials 1 to 3 do not contain Zn powder, the repair parts obtained from the comparative anti-food materials 1 to 3 correspond to the repair parts by the conventional method.
【００１３】[0013]
【表１】 [Table 1]
【００１４】[0014]
【表２】 [Table 2]
【００１５】[0015]
【表３】 [Table 3]
【００１６】実施例２ 実施例１で用意した本発明防食材１〜２４および比較防
食材１〜１５に対し、水の代りにスチレン・ブタジエン
ゴム系ゴムラテックスを主成分としたポリマー（以下ポ
リマーという）を、 防食材（セメント＋Ｚｎ粉末）：ポリマー＝１：０．２
５（重量比） となるように配合し混合したものを、図９に示されるよ
うに、割裂し露出せしめた鉄筋４４の一部表面に０．３
cmの厚さで塗布し、防食材層６を形成し、この防食材層
６の上にさらに実施例１で使用したセメントコンクリー
トで、元の供試体５５と同じ寸法になるように補修し、
補修部１および非補修部２からなる補修体６６を作製し
た。これら補修部１および非補修部２からなる補修体６
６を実施例１と同じ環境下に６ヶ月間放置したのち、補
修体６６を再び割裂し、鉄筋４４の腐食状態を調べると
ともに防食材層６と鉄筋４４との付着状況を目視および
ハンマー連打することにより観察し、さらに非補修部２
の塩化物含有量を測定したが、実施例１とほぼ同じ結果
が得られた。Example 2 A polymer containing styrene-butadiene rubber-based rubber latex as a main component instead of water (hereinafter referred to as a polymer) was used for the anticorrosive materials 1 to 24 of the present invention and the comparative anticorrosive materials 1 to 15 prepared in Example 1. ), Food protection material (cement + Zn powder): polymer = 1: 0.2
As shown in FIG. 9, 0.3 parts of the reinforcing bars 44 which were split and exposed were mixed and mixed so as to be 5 (weight ratio).
It is applied with a thickness of cm to form the anticorrosion layer 6, and the cement concrete used in Example 1 is further repaired on the anticorrosion layer 6 so as to have the same dimensions as the original test piece 55.
A repair body 66 including the repair part 1 and the non-repair part 2 was produced. Repair body 6 consisting of these repair section 1 and non-repair section 2
After leaving 6 in the same environment as in Example 1 for 6 months, the repair body 66 is cleaved again, the corrosion state of the reinforcing bar 44 is examined, and the state of adhesion between the food-proof material layer 6 and the reinforcing bar 44 is visually and hammered repeatedly. By observing, and further repairing part 2
The chloride content of was measured, and almost the same result as in Example 1 was obtained.
【００１７】上記実施例１および２によると、（１）Ｚ
ｎ粉末をポルトランドセメントに重量比で６０％以上添
加した防食材を塗布すると腐食は生じなくなるが、Ｚｎ
粉末が６０％未満含有している防食材では防食効果はな
く、Ｚｎ粉末含有量が少なくなるに従って腐食量は大き
くなり、特に補修部近傍の非補修部２の鉄筋４４は激し
く腐食していること、（２）鉄筋４４と防食材層６の付
着性については、Ｚｎ粉末含有量が９５％を越えると、
付着性が悪くなり、比較的簡単に鉄筋４４と防食材層６
とが剥離すること、などがわかった。以上のことから、
この発明の防食材は、Ｚｎ粉末を重量比で６０〜９５％
含有することが好ましく、この範囲のＺｎ粉末を含むこ
とにより十分な防食効果と付着性を有する防食材層を形
成することができることがわかる。According to Examples 1 and 2 above, (1) Z
Corrosion does not occur when an anti-corrosion material containing 60% by weight or more of n powder added to Portland cement is used.
An anticorrosive material containing less than 60% of powder has no anticorrosion effect, and the amount of corrosion increases as the content of Zn powder decreases. Particularly, the reinforcing bar 44 of the non-repair part 2 near the repair part is severely corroded. (2) Regarding the adhesion between the reinforcing bar 44 and the foodstuff protection layer 6, when the Zn powder content exceeds 95%,
Adhesion becomes poor, and it is relatively easy to rebar 44 and food protection layer 6.
It was found that and peel off. From the above,
The anti-food material of the present invention contains Zn powder in a weight ratio of 60 to 95%.
It is preferable to contain it, and it can be seen that the inclusion of the Zn powder in this range makes it possible to form an anticorrosion material layer having a sufficient anticorrosion effect and adhesiveness.
【００１８】[0018]
【発明の効果】この発明の防食材を用いると、コンクリ
ート構造物の部分的補修後に生じる補強鋼材のマクロセ
ル腐食や塩分等の腐食因子の侵入による腐食を防止する
ことができ、コンクリート構造物の耐用年数を延長させ
ることができ、さらに補修時の施工も水やポリマーの量
を調整することにより吹き付けや注入工法を採用するこ
とが可能であり、また、電気防食法における流電陽極方
式での犠牲陽極材、または外部電源方式での電極材とし
て用いることができるなど産業上すぐれた効果を奏する
ものである。EFFECTS OF THE INVENTION By using the anticorrosive material of the present invention, it is possible to prevent macrocell corrosion of a reinforcing steel material that occurs after a partial repair of a concrete structure or corrosion due to the intrusion of a corrosion factor such as salt, thereby improving the durability of the concrete structure. The number of years can be extended, and it is possible to adopt spraying or pouring method by adjusting the amount of water or polymer for the construction at the time of repair, and sacrifice of galvanic anode method in cathodic protection method. It has excellent industrial effects such that it can be used as an anode material or an electrode material in an external power supply system.
【図１】この発明の防食材の使用方法を説明するための
概略説明図である。FIG. 1 is a schematic explanatory view for explaining a method of using an anticorrosive material of the present invention.
【図２】この発明の防食材の他の使用方法を説明するた
めの概略説明図である。FIG. 2 is a schematic explanatory view for explaining another method of using the anticorrosive material of the present invention.
【図３】この発明の防食材の他の使用方法を説明するた
めの概略説明図である。FIG. 3 is a schematic explanatory view for explaining another method of using the anticorrosive material of the present invention.
【図４】この発明の防食材による施工場所を説明するた
めの概略説明図である。FIG. 4 is a schematic explanatory view for explaining a construction site of the anticorrosive material of the present invention.
【図５】この発明の防食材による他の施工場所を説明す
るための概略説明図である。FIG. 5 is a schematic explanatory view for explaining another construction site of the anticorrosive material of the present invention.
【図６】この発明の防食材を流電陽極方式の犠牲陽極材
として使用する状態を示す概略説明図である。FIG. 6 is a schematic explanatory view showing a state in which the anticorrosive material of the present invention is used as a sacrificial anode material of a galvanic anode method.
【図７】鉄筋コンクリート供試体の斜視図である。FIG. 7 is a perspective view of a reinforced concrete test piece.
【図８】実施例１で補修した鉄筋コンクリート供試体の
斜視図である。8 is a perspective view of a reinforced concrete test piece repaired in Example 1. FIG.
【図９】実施例２で補修した鉄筋コンクリート供試体の
斜視図である。9 is a perspective view of a reinforced concrete test piece repaired in Example 2. FIG.
【図１０】従来の補修方法を説明するための概略説明図
である。FIG. 10 is a schematic explanatory diagram for explaining a conventional repair method.
１ 補修部 ２ 非補修部 ３ 非補修部のコンクリート ４ 非補修部補強鋼材 ４′ 補修部補強鋼材 ５ 補修部のコンクリート ６ 防食材層 ７ 桟橋 ８ 海水 ９ 橋脚 １０ 車道 １１ 絶縁層 １２ 接続端子板 １３ リード線 １４ 補強鋼材 １５ 高架橋 ３３ コンクリート ４４ 鉄筋 ５５ 鉄筋コンクリート供試体 ６６ 補修体 1 Repair part 2 Non-repair part 3 Concrete of non-repair part 4 Reinforcement steel material of non-repair part 4'Reinforcement steel material of repair part 5 Concrete of repair part 6 Food protection layer 7 Pier 8 Seawater 9 Pier 10 Roadway 11 Insulation layer 12 Connection terminal board 13 Lead wire 14 Reinforced steel material 15 Viaduct 33 Concrete 44 Reinforcing bar 55 Reinforced concrete specimen 66 Repaired body
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 //(Ｃ０４Ｂ 28/02 14:34） 2102−4Ｇ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display area // (C04B 28/02 14:34) 2102-4G
Claims (3)
末を重量比で６０〜９５％含有してなることを特徴とす
る防食材。1. An anticorrosive material comprising 60 to 95% by weight of a metal powder having a sacrificial anode action in cement.
であることを特徴とする請求項１記載の防食材。2. The anti-food material according to claim 1, wherein the cement is Portland cement.
Ｚｎ粉末であることを特徴とする請求項１または請求項
２記載の防食材。3. The metal powder having a sacrificial anode action,
It is Zn powder, The anti-food material of Claim 1 or Claim 2 characterized by the above-mentioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5157957A JPH06345512A (en) | 1993-06-03 | 1993-06-03 | Corrosion protective material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5157957A JPH06345512A (en) | 1993-06-03 | 1993-06-03 | Corrosion protective material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06345512A true JPH06345512A (en) | 1994-12-20 |
Family
ID=15661156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5157957A Pending JPH06345512A (en) | 1993-06-03 | 1993-06-03 | Corrosion protective material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06345512A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2770839A1 (en) * | 1997-11-07 | 1999-05-14 | Richard Guerin | Repairing reinforced concrete with mortar containing sacrificial anode metal filler |
| JP2004536231A (en) * | 2001-07-24 | 2004-12-02 | ホィットモア，デービッド | Cathodic protection |
| EP1982964A1 (en) | 2007-04-20 | 2008-10-22 | Evonik Degussa GmbH | Preparation containing organosilicium compound and its use |
| JP6206995B1 (en) * | 2016-08-04 | 2017-10-04 | 中日本高速道路株式会社 | Method for forming protective film and highly corrosion-resistant steel member having protective film |
-
1993
- 1993-06-03 JP JP5157957A patent/JPH06345512A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2770839A1 (en) * | 1997-11-07 | 1999-05-14 | Richard Guerin | Repairing reinforced concrete with mortar containing sacrificial anode metal filler |
| JP2004536231A (en) * | 2001-07-24 | 2004-12-02 | ホィットモア，デービッド | Cathodic protection |
| EP1982964A1 (en) | 2007-04-20 | 2008-10-22 | Evonik Degussa GmbH | Preparation containing organosilicium compound and its use |
| JP6206995B1 (en) * | 2016-08-04 | 2017-10-04 | 中日本高速道路株式会社 | Method for forming protective film and highly corrosion-resistant steel member having protective film |
| JP2018021234A (en) * | 2016-08-04 | 2018-02-08 | 中日本高速道路株式会社 | Formation method of protective film, and high corrosion resistance steel member having protective film |
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