JP2542412B2 - Conductive structure - Google Patents
Conductive structureInfo
- Publication number
- JP2542412B2 JP2542412B2 JP63061356A JP6135688A JP2542412B2 JP 2542412 B2 JP2542412 B2 JP 2542412B2 JP 63061356 A JP63061356 A JP 63061356A JP 6135688 A JP6135688 A JP 6135688A JP 2542412 B2 JP2542412 B2 JP 2542412B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon black
- carbon fiber
- conductive carbon
- conductive
- weight
- 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
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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/90—Electrical properties
- C04B2111/94—Electrically conducting materials
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、セメントに炭素繊維を含有して固化したモ
ルタルとかコンクリートなどの導電性構造体に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a conductive structure such as mortar or concrete in which cement contains carbon fibers to be solidified.
＜従来の技術＞ 近年では、セメントに炭素繊維を混入することによ
り、この炭素繊維を補強材として強度の高いモルタルや
コンクリートの構造体が得られるようになってきてい
る。また、コンクリートの導電性を向上させるために、
コンクリート中に炭素繊維を混入することは公知であ
り、炭素繊維を多く入れると導電性は良くなる。<Prior Art> In recent years, it has become possible to obtain a high-strength mortar or concrete structure by using carbon fiber as a reinforcing material by mixing carbon fiber into cement. In addition, in order to improve the conductivity of concrete,
It is known to mix carbon fiber into concrete, and the more carbon fiber is added, the better the conductivity.
＜発明が解決しようとする課題＞ しかしながら、炭素繊維の混入量を増加していって
も、導電性の向上には限界があって、ある値以上の導電
性は得られない。<Problems to be Solved by the Invention> However, even if the amount of carbon fiber mixed is increased, there is a limit to the improvement in conductivity, and conductivity above a certain value cannot be obtained.
更に、多量の炭素繊維を混入することは、炭素繊維が
ブロック化するために困難であり、また、炭素繊維が高
価なために、全体としてコスト高になる欠点があった。Further, it is difficult to mix a large amount of carbon fibers because the carbon fibers are blocked, and the carbon fibers are expensive, so that there is a drawback that the cost becomes high as a whole.
本発明は、このような事情に鑑みてなされたものであ
って、炭素繊維の混入量を少なくして安価に導電性を向
上できるようにすることを目的とする。The present invention has been made in view of such circumstances, and an object of the present invention is to reduce the amount of carbon fibers mixed in and improve the conductivity at low cost.
＜課題を解決するための手段＞ 本発明は、このような目的を達成するために、冒頭に
記載した導電性構造体において、炭素繊維と導電性カー
ボンブラックとの含有重量の合計がセメントの重量の2w
t％以上、10wt％以下で、かつ、導電性カーボンブラッ
クの含有重量が炭素繊維の重量の0.1〜９倍になるよう
に導電性カーボンブラックを含有したことを特徴として
いる。<Means for Solving the Problems> In order to achieve such an object, the present invention provides the conductive structure described at the beginning, in which the total content weight of carbon fibers and conductive carbon black is the weight of the cement. 2w
It is characterized in that the content of the conductive carbon black is not less than t% and not more than 10 wt% and that the content weight of the conductive carbon black is 0.1 to 9 times the weight of the carbon fiber.
セメントに含有する炭素繊維と導電性カーボンブラッ
クとの合計重量が2wt％未満では相乗効果が少ないし、1
0wt％を越えると成形が難しくなる。混入量が10wt％に
近づくほど炭素繊維の長さを短くすることが好ましい。
更に、導電性カーボンブラックの含有重量が炭素繊維の
重量の0.1〜９倍であるときに好適な結果を得ることが
できる。If the total weight of carbon fiber and conductive carbon black contained in the cement is less than 2 wt%, the synergistic effect will be small.
If it exceeds 0 wt%, molding becomes difficult. It is preferable to shorten the length of the carbon fiber as the mixed amount approaches 10 wt%.
Further, suitable results can be obtained when the content weight of the conductive carbon black is 0.1 to 9 times the weight of the carbon fiber.
＜作用＞ 導電性を高めるために炭素繊維のみを混入し、その混
入量を増加していっても、導電性はある値以上にはなら
ない（第４図参照）。<Operation> Even if carbon fiber alone is mixed to increase conductivity and the mixing amount is increased, the conductivity does not exceed a certain value (see FIG. 4).
一方、導電性カーボンブラックのみで導電性を高める
ために大量の導電性カーボンブラックを混入すると成形
体の強度が低下し、また、その混入量をより一層増加す
ると、流動性が失われて目的の成形体を作ることもでき
なくなる。On the other hand, if a large amount of conductive carbon black is mixed in order to increase the conductivity only with conductive carbon black, the strength of the molded article will decrease, and if the mixing amount is further increased, the fluidity will be lost. It also becomes impossible to make a molded body.
しかして、本発明の構成によれば、炭素繊維と導電性
カーボンブラックとを、上述のように所定の割合で含有
することにより、その導電性カーボンブラックと炭素繊
維との相乗効果により、炭素繊維または導電性カーボン
ブラックそれぞれのみを含有した状態では得られない導
電性を付与する。Thus, according to the configuration of the present invention, by containing the carbon fiber and the conductive carbon black in a predetermined ratio as described above, the carbon fiber is synergistically produced by the conductive carbon black and the carbon fiber. Alternatively, it imparts conductivity that cannot be obtained in a state where only the conductive carbon black is contained.
＜実施例＞ 次に、本発明の実施例を図面に基づいて詳細に説明す
る。<Example> Next, the example of the present invention is described in detail based on a drawing.
ピッチ系炭素繊維（公称引っ張り強さ70kg/mm2）50g
に、ポルトランドセメント2000g、骨材としての珪砂100
0gを加え、オムニミキサーで１分間混合する。そのオム
ニミキサーの中に、ケッチェンブラックEC（オランダAK
ZO社製）を分散したノニオン性の導電性カーボンブラッ
ク水分散液ライオンペーストＷ−311N（ライオン株式会
社製、表面積［BET］が800m2/gで粒子径が20〜30mμ）5
88g（導電性カーボンブラックを588g×0.085wt％＝50g
含む）と混和剤メチルセルロース12gを水512gに溶かし
た溶液を加え、更に、３分間オムニミキサーで混合す
る。これを型枠の中に流し込んで養生固化し、40×40×
80mmのブロックを作製する。Pitch-based carbon fiber (nominal tensile strength 70kg / mm 2 ) 50g
, Portland cement 2000g, silica sand 100 as aggregate
Add 0 g and mix for 1 minute with an omni mixer. In the Omni mixer, Ketjen Black EC (Netherlands AK
Nonionic conductive carbon black aqueous dispersion Lion paste W-311N (manufactured by Lion Corporation, surface area [BET] is 800 m 2 / g and particle diameter is 20 to 30 mμ) 5
88g (588g of conductive carbon black x 0.085wt% = 50g
) And an admixture of 12 g of methyl cellulose dissolved in 512 g of water are added, and further mixed for 3 minutes with an omni mixer. Pour this into the mold to cure and solidify, 40 × 40 ×
Make an 80 mm block.
また、炭素繊維と導電性カーボンブラックとの合計重
量が100gになるように、炭素繊維の重量を、100g、83
g、66g、34g、0gと変更し、前述の場合と同様にして40
×40×80mmのブロックを作製する。Further, the total weight of the carbon fiber and the conductive carbon black is 100 g, the weight of the carbon fiber is 100 g, 83
Change g, 66g, 34g, 0g to 40
Make a block of × 40 × 80mm.
その後、第１図に示すように、上述のようにして得ら
れたブロック１の両端それぞれに、40×50mmの銅板2,2
をドータイト（タイプＤ−550:藤倉化成株式会社製）で
接着し、デジタル・マルチメーターTR6877（アドバンテ
スト社製）を用いて体積固有抵抗値（Ω・cm）を測定し
たところ、第２図のグラフにおいて黒丸（●）で示す結
果を得た。Then, as shown in FIG. 1, a 40 × 50 mm copper plate 2,2 is attached to each end of the block 1 obtained as described above.
Were adhered with DOTITE (type D-550: Fujikura Kasei Co., Ltd.), and the volume resistivity (Ω · cm) was measured using a digital multimeter TR6877 (Advantest Co., Ltd.). The results indicated by black circles (●) were obtained.
また、炭素繊維と導電性カーボンブラックとの合計重
量が60gになるように、かつ、炭素繊維の含有率を50％
にし、それ以外は前述の場合と同じ条件で試験体を作製
し、その試験体について、前述同様にして体積固有抵抗
値を測定したところ、第２図のグラフにおいて黒三角
（▲）で示す結果を得た。In addition, the total weight of carbon fiber and conductive carbon black should be 60g, and the carbon fiber content should be 50%.
Other than that, a test piece was prepared under the same conditions as those described above, and the volume resistivity of the test piece was measured in the same manner as described above. The result shown by the black triangle (▲) in the graph of FIG. Got
また、炭素繊維と導電性カーボンブラックとの合計重
量が80gになるように、かつ、炭素繊維の含有率を50％
にし、それ以外は前述の場合と同じ条件で試験体を作製
し、その試験体について、前述同様にして体積固有抵抗
値を測定したところ、第２図のグラフにおいて白三角
（△）で示す結果を得た。In addition, the total weight of carbon fiber and conductive carbon black should be 80g, and the carbon fiber content should be 50%.
Other than that, a test piece was prepared under the same conditions as those described above, and the volume specific resistance value of the test piece was measured in the same manner as described above. The result shown by the white triangle (△) in the graph of FIG. Got
また、炭素繊維と導電性カーボンブラックとの合計重
量が120gになるように、かつ、炭素繊維の含有率を50％
にし、それ以外は前述の場合と同じ条件で試験体を作製
し、その試験体について、前述同様にして体積固有抵抗
値を測定したところ、第２図のグラフにおいて白丸
（○）で示す結果を得た。In addition, the total weight of carbon fiber and conductive carbon black is 120 g, and the carbon fiber content is 50%.
Other than that, a test piece was prepared under the same conditions as those described above, and the volume specific resistance value of the test piece was measured in the same manner as described above. The result indicated by a white circle (○) in the graph of FIG. 2 was obtained. Obtained.
更に、炭素繊維と導電性カーボンブラックとを等量づ
つ、即ち、炭素繊維の含有率を50％にし、それ以外は前
述の場合と同じ条件にして、炭素繊維と導電性カーボン
ブラックの合計重量を変えながら試験体を作製し、その
試験体について、前述同様にして体積固有抵抗値を測定
したところ、第３図のグラフに示す結果を得た。Further, carbon fibers and conductive carbon black in equal amounts, that is, the carbon fiber content is 50%, otherwise the same conditions as above, the total weight of the carbon fibers and conductive carbon black. A test body was prepared while changing the volume, and the volume resistivity value of the test body was measured in the same manner as described above, and the results shown in the graph of FIG. 3 were obtained.
これに対して、炭素繊維のみを用い、それ以外は前述
の場合と同じ条件にして、炭素繊維の重量を変えながら
試験体を作製し、その試験体について、前述同様にして
体積固有抵抗値を測定したところ、第４図のグラフに示
す結果を得た。On the other hand, using only carbon fibers, under the same conditions as above except for the above, test specimens were prepared while changing the weight of the carbon fibers, and the volume resistivity values of the test specimens were measured in the same manner as described above. Upon measurement, the results shown in the graph of FIG. 4 were obtained.
また、前述の導電性カーボンブラック水分散液ライオ
ンペーストＷ−311N（ライオン株式会社製）のみを用
い、それ以外は前述の場合と同じ条件にして、導電性カ
ーボンブラックの重量を変えながら試験体を作製し、そ
の試験体について、前述同様にして体積固有抵抗値を測
定したところ、第５図のグラフに示す結果を得た。Also, using only the above-mentioned conductive carbon black aqueous dispersion Lion Paste W-311N (manufactured by Lion Corporation) under the same conditions as described above except that the test samples were prepared while changing the weight of the conductive carbon black. The volume resistivity of the produced test piece was measured in the same manner as described above, and the results shown in the graph of FIG. 5 were obtained.
また、別のアニオン性の導電性カーボンブラック水分
散液ライオンペーストＷ−310A（ライオン株式会社製）
のみを用い、それ以外は前述の場合と同じ条件にして、
導電性カーボンブラックの重量を変えながら試験体を作
製し、その試験体について、前述同様にして体積固有抵
抗値を測定したところ、第６図のグラフに示す結果を得
た。In addition, another anionic conductive carbon black aqueous dispersion Lion Paste W-310A (manufactured by Lion Corporation)
Using only the same conditions as above, except that
A test sample was prepared while changing the weight of the conductive carbon black, and the volume specific resistance value of the test sample was measured in the same manner as described above. The results shown in the graph of FIG. 6 were obtained.
以上の結果から、次のことが明らかであった。即ち、
炭素繊維のみ、等量づつの炭素繊維と導電性カーボンブ
ラック、導電性カーボンブラックのみそれぞれを100g含
有した場合を取り上げて説明すれば、炭素繊維のみの場
合の体積固有抵抗値ρは、第４図に示すように（P2）、
logρ＝約1.9Ω・cmであり、一方の導電性カーボンブラ
ックのみの場合の体積固有抵抗値は、第５図に示すよう
に（P3）、logρ＝約1.33Ω・cmであり、他方の導電性
カーボンブラックのみの場合の体積固有抵抗値は、第６
図に示すように（P4）、logρ＝約2.15Ω・cmであり、
そして、等量づつの炭素繊維と導電性カーボンブラック
の場合の体積固有抵抗値は、第３図に示すように（P
1）、logρ＝約1.0Ω・cmであり、本発明によれば、炭
素繊維と導電性カーボンブラックとの相乗効果によっ
て、少量であっても、体積固有抵抗値をより一層低下で
きていること、即ち、導電性を向上できていることが明
らかである。From the above results, the following was clear. That is,
Explaining the case of containing only 100 g of carbon fibers only, equal amounts of carbon fibers, conductive carbon black, and conductive carbon black alone, the volume resistivity ρ in the case of carbon fibers only is shown in FIG. (P2),
log ρ = about 1.9 Ω · cm, and the volume resistivity of only one conductive carbon black is as shown in Fig. 5 (P3), log ρ = about 1.33 Ω · cm, and the other conductivity is The volume specific resistance of the carbon black only is 6th
As shown in the figure (P4), log ρ = about 2.15Ω · cm,
The volume specific resistance value in the case of carbon fibers and conductive carbon black in equal amounts is as shown in FIG.
1), log ρ = about 1.0 Ω · cm, and according to the present invention, the volume resistivity value can be further reduced by a synergistic effect of the carbon fiber and the conductive carbon black even with a small amount. That is, it is clear that the conductivity can be improved.
また、炭素繊維のみの場合であれば、第４図に示すよ
うに、セメント2000gに対して、炭素繊維を100g以上増
量して含有させても、体積固有抵抗値を有効に低下でき
なくなり、また、一方の導電性カーボンブラックのみの
場合にあっても、第５図に示すように、同様に、導電性
カーボンブラックを100g以上増量して含有させても、体
積固有抵抗値を有効に低下できなくなり、更に、他方の
導電性カーボンブラックのみの場合でも、第６図に示す
ように、導電性カーボンブラックを160g以上増量して含
有させても、体積固有抵抗値を有効に低下できなくな
る。Further, in the case of only carbon fiber, as shown in FIG. 4, even if the carbon fiber is increased by 100 g or more with respect to 2000 g of cement, the volume resistivity value cannot be effectively lowered, and Even in the case of only one conductive carbon black, as shown in FIG. 5, similarly, even if the conductive carbon black is increased by 100 g or more and contained, the volume resistivity value can be effectively reduced. Further, even in the case of only the other conductive carbon black, as shown in FIG. 6, even if the conductive carbon black is added in an amount of 160 g or more, the volume resistivity cannot be effectively lowered.
これによって、本発明によれば、炭素繊維と導電性カ
ーボンブラックとの相乗効果によって、120g以上増量し
て含有させても、体積固有抵抗値を有効に低下でき、炭
素繊維のみ、または、導電性カーボンブラックのみでは
達成できない導電性を得られることが明らかであった。Thereby, according to the present invention, by the synergistic effect of the carbon fiber and the conductive carbon black, the volume resistivity value can be effectively reduced even if the carbon fiber is added in an amount of 120 g or more. It was clear that conductivity could not be achieved with carbon black alone.
また、以上のこと、ならびに、第２図に示される結果
から、セメントに含有する炭素繊維と導電性カーボンブ
ラックとの合計重量が2wt％以上、10wt％以下、より好
ましくは2wt％以上、6wt％以下のとき、好適な結果が得
られる。合計重量が2wt％未満では相乗効果が少ない
し、10wt％を越えると成形が難しくなる。混入量が10wt
％に近づくほど炭素繊維の長さを短くすることが好まし
い。更に、導電性カーボンブラックの含有重量が炭素繊
維の重量の0.1〜９倍であるときに好適な結果を得るこ
とができ、そして、0.5〜５倍のときにより一層好適な
結果が得られていることが明らかであった。Further, from the above and the results shown in FIG. 2, the total weight of the carbon fiber and the conductive carbon black contained in the cement is 2 wt% or more and 10 wt% or less, more preferably 2 wt% or more and 6 wt%. Suitable results are obtained when: If the total weight is less than 2 wt%, the synergistic effect is small, and if it exceeds 10 wt%, molding becomes difficult. Mixing amount is 10wt
It is preferable to shorten the length of the carbon fiber as it approaches%. Further, preferable results can be obtained when the content weight of the conductive carbon black is 0.1 to 9 times the weight of the carbon fiber, and more preferable results are obtained when the content weight of the conductive carbon black is 0.5 to 5 times. It was clear.
本発明に用いられる炭素繊維としては、ピッチ系やポ
リアクリロニトリル（PAN）系、レイヨン系など、各種
の炭素繊維が適用できる。As the carbon fiber used in the present invention, various carbon fibers such as pitch-based, polyacrylonitrile (PAN) -based and rayon-based carbon fibers can be applied.
また、本発明に用いられる導電性カーボンブラックと
しては、前述したアニオン性の導電性カーボンブラック
にも適用できる。Further, the conductive carbon black used in the present invention can be applied to the above-mentioned anionic conductive carbon black.
また、上記実施例では、炭素繊維と導電性カーボンブ
ラックとを、セメントと骨材としての珪砂に含有して固
化したモルタル構造体について説明したが、粗骨材を加
えたコンクリート構造体にも適用でき、その場合でも上
述実施例と同様の結果を得ることができる。Further, in the above examples, the carbon fiber and the conductive carbon black are described as the mortar structure containing cement and silica sand as an aggregate and solidified, but it is also applied to the concrete structure containing the coarse aggregate. In that case, the same result as that of the above-described embodiment can be obtained.
＜発明の効果＞ 以上の説明から明らかなように、本発明によれば、炭
素繊維と導電性カーボンブラックとの含有重量の合計の
セメントの重量に対する割合、および、導電性カーボン
ブラックの含有重量の炭素繊維の重量に対する割合それ
ぞれを所定の範囲内に設定して導電性カーボンブラック
を含有させ、導電性カーボンブラックと炭素繊維との相
乗効果により、導電性カーボンブラックを少量添加する
だけで、炭素繊維の混入量を大幅に減少できながら高い
導電性を得ることができ、炭素繊維の使用量を少なくで
きるうえに、導電性カーボンブラックは炭素繊維よりも
安価であり、導電性構造体を経済的に作ることができ
る。<Effects of the Invention> As is apparent from the above description, according to the present invention, the ratio of the total content weight of carbon fibers and conductive carbon black to the weight of cement, and the content weight of conductive carbon black. The ratio of the carbon fiber to the weight of each is set within a predetermined range to contain the conductive carbon black, and due to the synergistic effect of the conductive carbon black and the carbon fiber, a small amount of the conductive carbon black is added to the carbon fiber. It is possible to obtain high conductivity while significantly reducing the amount of carbon fiber mixed in, and to reduce the amount of carbon fiber used. In addition, conductive carbon black is cheaper than carbon fiber, making the conductive structure economical. Can be made.
更に、炭素繊維の補強材としての効果もあり、強度が
高く、かつ、導電性の高い構造体を得ることができる。Further, it has an effect as a reinforcing material of carbon fiber, and a structure having high strength and high conductivity can be obtained.
第１図は試験体の斜視図、第２図は、炭素繊維と導電性
カーボンブラックとを混合して含有した場合の炭素繊維
の含有率と体積固有抵抗値との相関を示すグラフ、第３
図は、炭素繊維と導電性カーボンブラックとを等量づつ
混合して含有した場合の混合重量と体積固有抵抗値との
相関を示すグラフ、第４図は、炭素繊維のみを含有した
場合の含有率と体積固有抵抗値との相関を示すグラフ、
第５図および第６図は、それぞれ導電性カーボンブラッ
クのみを含有した場合の含有重量と体積固有抵抗値との
相関を示すグラフである。FIG. 1 is a perspective view of a test body, FIG. 2 is a graph showing the correlation between the carbon fiber content and the volume resistivity when carbon fibers and conductive carbon black are mixed and contained, and FIG.
FIG. 4 is a graph showing the correlation between the mixed weight and the volume resistivity when carbon fibers and conductive carbon black are mixed and contained in equal amounts, and FIG. 4 is the content when only carbon fibers are contained. Graph showing the correlation between the modulus and the volume resistivity value,
FIG. 5 and FIG. 6 are graphs showing the correlation between the content weight and the volume specific resistance value when only the conductive carbon black is contained.
Claims (1)
電性構造体であって、 炭素繊維と導電性カーボンブラックとの含有重量の合計
がセメントの重量の2wt％以上、10wt％以下で、かつ、
導電性カーボンブラックの含有重量が炭素繊維の重量の
0.1〜９倍になるように導電性カーボンブラックを含有
してなることを特徴とする導電性構造体。1. A conductive structure obtained by solidifying cement containing carbon fibers, wherein the total content weight of carbon fibers and conductive carbon black is 2 wt% or more and 10 wt% or less of the weight of cement, And,
The content of conductive carbon black is less than the weight of carbon fiber.
A conductive structure comprising conductive carbon black in an amount of 0.1 to 9 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63061356A JP2542412B2 (en) | 1988-03-14 | 1988-03-14 | Conductive structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63061356A JP2542412B2 (en) | 1988-03-14 | 1988-03-14 | Conductive structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01234347A JPH01234347A (en) | 1989-09-19 |
| JP2542412B2 true JP2542412B2 (en) | 1996-10-09 |
Family
ID=13168792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63061356A Expired - Lifetime JP2542412B2 (en) | 1988-03-14 | 1988-03-14 | Conductive structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2542412B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63115062A (en) * | 1986-11-04 | 1988-05-19 | Hitachi Ltd | Base sequenator of dna |
| US6825444B1 (en) * | 1999-01-29 | 2004-11-30 | Board Of Regents Of University Of Nebraska | Heated bridge deck system and materials and method for constructing the same |
| KR20030028859A (en) * | 2001-10-04 | 2003-04-11 | 주식회사 인트켐 | The cement compositions for absorbing electromagnetic waves |
| KR100811802B1 (en) * | 2006-08-14 | 2008-03-10 | 박석균 | Rib materials for use in concrete reinforcing rod |
| JP2009227475A (en) * | 2008-03-19 | 2009-10-08 | Yokohama Tlo Co Ltd | Cement composition |
| WO2022189027A1 (en) * | 2021-03-12 | 2022-09-15 | Harold Scholz & Co. Gmbh | Electrically conductive building material, in particular concrete, comprising an electrically conductive graphite-based additive |
| WO2022189026A1 (en) * | 2021-03-12 | 2022-09-15 | Harold Scholz & Co. Gmbh | Electrically conductive building material, in particular concrete, comprising an electrically conductive additive based on carbon fibres and graphite |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2624274B2 (en) * | 1987-12-04 | 1997-06-25 | 電気化学工業株式会社 | Conductive hydraulic composition |
-
1988
- 1988-03-14 JP JP63061356A patent/JP2542412B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01234347A (en) | 1989-09-19 |
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