JPH0393182A - Earth resistance reducing material - Google Patents
Earth resistance reducing materialInfo
- Publication number
- JPH0393182A JPH0393182A JP22839789A JP22839789A JPH0393182A JP H0393182 A JPH0393182 A JP H0393182A JP 22839789 A JP22839789 A JP 22839789A JP 22839789 A JP22839789 A JP 22839789A JP H0393182 A JPH0393182 A JP H0393182A
- Authority
- JP
- Japan
- Prior art keywords
- water
- reducing material
- resistance reducing
- calcium aluminate
- earth resistance
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002250 absorbent Substances 0.000 claims description 10
- 230000002745 absorbent Effects 0.000 claims description 10
- 239000002075 main ingredient Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 238000004898 kneading Methods 0.000 abstract description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 abstract description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 abstract description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 abstract description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 abstract description 2
- 239000001913 cellulose Substances 0.000 abstract description 2
- 229920002678 cellulose Polymers 0.000 abstract description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract description 2
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 abstract 1
- 229920002125 Sokalan® Polymers 0.000 abstract 1
- 239000004584 polyacrylic acid Substances 0.000 abstract 1
- 229910052602 gypsum Inorganic materials 0.000 description 10
- 239000010440 gypsum Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 7
- 239000004020 conductor Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- -1 JsCaSOa Inorganic materials 0.000 description 1
- 108010009736 Protein Hydrolysates Proteins 0.000 description 1
- 229920002472 Starch Polymers 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
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 239000002001 electrolyte material Substances 0.000 description 1
- CYKDLUMZOVATFT-UHFFFAOYSA-N ethenyl acetate;prop-2-enoic acid Chemical compound OC(=O)C=C.CC(=O)OC=C CYKDLUMZOVATFT-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、耐久性や導電性の優れた接地抵抗低減材に関
する．
〔従来の技術〕
従来の接地施工は、セメント、セッコウ及び水ガラス等
に電解質物質又は導電性繊維を添加し、水を加え、混練
り後、これを接地極周辺に施すことが行なわれていた．
しかしながら、この方法では、材料分離や材料の硬化性
状の面から、加える水に限度があり、硬化体中に存在す
る水による導電性向上が不可能であった．そのため、導
電性向上の面から電解質物質又は導電性繊維を多量に添
加することが提案されたが、経済的でないという課題が
あった．本発明者らは、上記課題を解決すべく種々検討
した結果、特定な物質を使用することにより、水を多く
含有することができ、導電性の良好な、かつ、耐久性に
優れた接地抵抗低減材が得られる知見を得て本発明を完
或するに至った．
〔問題点を解決するための手段〕
即ち、本発明は、高吸水樹脂とカルシウムアルミネート
を主戒分とする接地抵抗低減材である．以下、本発明を
詳細に説明する．
本発明の接地抵抗低減材は、高吸水樹脂とカルシウムア
ルミネートを主成分とし、水と混合すると硬化するもの
である．
本発明で使用される高吸水性樹脂とは、吸水させる場合
、自重に対して３０倍以上の吸水能力を有する樹脂で、
好ましくは１００倍以上、より好ましくは３００倍以上
、最も好ましくは８００倍以上の吸水能力を有するもの
である．
高吸水性樹脂としては、ポリアクリル酸塩系、ポリビニ
ルアルコール系、カルボキシメチルセルロース系、セル
ロース系、デンブン系、ビニルアルコールーアクリル酸
塩共重合体、ポリアクリルニトリル加水分解物及び非イ
オンポリマー等が挙げられ、これらのうち、一種又は二
種以上を使用することが可能であり、市販品として、荒
川化学工業■商品名ｒアラソープ」、三洋化或工業■商
品名ｒサンウェット１及び住友化学工業■商品名『スミ
カゲルｊ等が挙げられる．
高吸水性樹脂の使用量は、特に制限されるものではない
が、一般的には、混練り水１００重量部に対し、０．２
〜ｌＯ重量部が好ましい．０．２重量部未満では、高吸
水性樹脂による効果が得られず、１０重量部を越えて混
入しても、その使井効果が期待できず、経済的でない．
本発明で使用するカルシウムアルミネートとは、ＣａＯ
をＣ．ＡＩ，０，を＾とすると、ＣＡ，Ｃ＾１，Ｃ３Ａ
ｓＣａＦｚ＋Ｃ＋Ｊ・ＣｔｔＡｔＣａＰｉ，ＣＪ及びＣ
ＪｓＣａＳＯａ等と示される鉱物組戒の結晶賞又は非晶
質、さらには、アルミナセメントなどが挙げられるが、
これらのうち、非品質のカルシウムアルξネートが好ま
しく、特に、強度発現の効果が大きい点から非晶質のＣ
＋ｚＡｔがより好ましい，
カルシウムアルミネートの粉末度は、特に制限されるも
のではないが、一般的に、プレーン値で１．０００ｄ／
ｇ以上が好ましく、３．０００＝６．０００ｃｄ／ｇが
より好ましい．
また、本発明では、さらにセシコウ類を併用して、強度
を向上することが可能である．ここでセッコウ類とは、
無水、半水及び三水の各種セッコウが使用できる．
セッコウ類の使用量は、カルシウムアルミネート１重量
部に対して２０重量部以下が好ましく、１．５重量部以
下がより好ましい．２０重量部を越えて使用すると、強
度低下の原因となる傾向がある．セッコウ頬の粉末度は
特に限定されるものではないが、一般的には、ブレーン
値で１．０００ｉ／ｇ以上が好まし＜ 、３．０００〜
６，０００ｃｊ／ｇがより好ましい．水の使用量は、特
に限定されるものではないが、カルシウムアルミネート
、又は、カルシウムアルミネートとセッコウの合計１０
０重量部に対して、５０〜２．０００重量部が好ましい
。５０重量部より少ないと高吸水性樹脂の吸水する水量
が少なくなり、存在する水による接地抵抗低減効果があ
まり期待できず、経済的でない．逆に、２．０００重量
部より多い量では、カルシウムアルミネート又はカルシ
ウムアル藁ネートとセッコウによる効果が得にくい．本
発明ではさらに導電性物質を併用する゛ことができる．
導電性物賞としては、塩化ナトリウム、塩化カルシウム
及び硫酸銅などの電解質物質や、カーボンプラック、木
炭の粉末、金属粉末、炭素繊維及び綱繊維等が挙げられ
る．
導電性物質の使用量は、高吸水性樹脂と、カルシウムア
ルミネート又はカルシウムアルミネートとセッコウの合
計１００重量部に対して、０．０２〜ＩＯ重量部程度が
好ましく、導電性物質の併用により、接地抵抗低減効果
は向上する．
本発明の接地抵抗低減材の使用方法は、特に制限される
ものではないが、例えば、直径３０〜５０ｃ１、深さ７
０〜１００ａｓ程度の孔を掘り、接地棒を打込み、その
周囲に接地抵抗低減材を入れる方法などが可能である．
接地抵抗低減材は各材料を任意の順番に孔の中へ投入し
ても良いが、作業効率や接地抵抗低減効果の向上のため
には、予め混合しておくことが好ましい．混合に際して
は傾胴ミキサーやオムニミキサーなどの通常の混合機の
使用が可能である．
〔実施例〕
以下、実施例により本発明を説明する．実施例１
第１表に示す配合を用い、混練り後、得られた接地抵抗
低減材の固有抵抗を測定した．その測定結果を第１表に
併記する．
〈使用材料〉
ボリマー：高吸水性樹脂、住友化学工業■商品名『ス亀
カゲルＪ主成分酢酸ビニルーアクリル酸エステル共重合
体ケン化物
水 ：純水
ＣＡ ：カルシウムアルミネート、Ｃ＋ｚＡｔ、非晶
質
セッコウ：半水セッコウ、試薬２級
：導電性物質、炭素繊維、呉羽化学工
業■商品名『クレカチョップｊ長さ、
２５ｍｓ，径１５μ
導電物
第
１
表
固有抵抗の単位は（Ω・ｃｍ）
なお、固有抵抗測定後、各硬化体を２０℃の水中に没し
たところ、７日経過後でも、すべて崩壊しなかった．
実施例２
直径５０ｃｍ，深さ１−の孔を４ケ所掘り、孔の中に長
さ１．５−のアース棒を１ＩＩ打込んだ．この孔に、実
施例１実験Ｎａｌ− ６により得られた接地抵抗低減材
を流し込み、接地抵抗値を測定したところ、７０Ωとな
った．
〔発明の効果〕
以上、本発明による効果は、
１）高吸水性樹脂の吸水性により、接地抵抗低減材の硬
化物中に多量の水を存在させることができ、導電性が向
上する．
２）高吸水性樹脂を使用することにより、少量の材料で
多量の水を含有した接地抵抗低減材の硬化物が得られる
ので、経済的である．DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a grounding resistance reducing material with excellent durability and conductivity. [Conventional technology] Conventional grounding work involves adding electrolyte substances or conductive fibers to cement, gypsum, water glass, etc., adding water, kneading, and applying this around the ground electrode. ．． However, with this method, there is a limit to the amount of water that can be added due to material separation and curing properties of the material, and it has been impossible to improve conductivity by using water present in the cured material. Therefore, it has been proposed to add large amounts of electrolyte substances or conductive fibers to improve conductivity, but this poses the problem of being uneconomical. As a result of various studies to solve the above problems, the present inventors have found that by using a specific material, a grounding resistor that can contain a large amount of water, has good conductivity, and has excellent durability. The present invention was completed by obtaining the knowledge that a reduction material can be obtained. [Means for Solving the Problems] That is, the present invention is a ground resistance reducing material whose main components are a super absorbent resin and calcium aluminate. The present invention will be explained in detail below. The ground resistance reducing material of the present invention has super absorbent resin and calcium aluminate as its main components, and hardens when mixed with water. The super absorbent resin used in the present invention is a resin that has a water absorption capacity of 30 times or more than its own weight when water is absorbed.
It preferably has a water absorption capacity of 100 times or more, more preferably 300 times or more, and most preferably 800 times or more. Examples of super absorbent resins include polyacrylate-based, polyvinyl alcohol-based, carboxymethyl cellulose-based, cellulose-based, starch-based, vinyl alcohol-acrylate copolymers, polyacrylonitrile hydrolysates, and nonionic polymers. It is possible to use one or more of these, and as commercially available products, Arakawa Chemical Co., Ltd. (trade name: Ara Soap), Sanyo Kakogyo Co., Ltd. (trade name: Sunwet 1), and Sumitomo Chemical Co., Ltd. (trade name: Sunwet 1). Product names include ``Sumikagel J, etc.'' The amount of super absorbent resin used is not particularly limited, but generally 0.2 parts by weight per 100 parts by weight of kneading water.
~lO parts by weight are preferred. If it is less than 0.2 parts by weight, the effect of the superabsorbent resin cannot be obtained, and even if it exceeds 10 parts by weight, no effect can be expected from its use, which is not economical. The calcium aluminate used in the present invention is CaO
C. If AI,0, is ^, then CA,C^1,C3A
sCaFz+C+J・CttAtCaPi, CJ and C
Examples include crystalline or amorphous minerals such as JsCaSOa, and alumina cement.
Among these, non-quality calcium alkalinate is preferable, and in particular, amorphous calcium
+zAt is more preferable. The fineness of calcium aluminate is not particularly limited, but is generally 1.000 d/
g or more is preferable, and 3.000=6.000 cd/g is more preferable. In addition, in the present invention, it is possible to further improve the strength by using snails in combination. What is gypsum here?
Various types of anhydrous, semi-hydrous and tri-hydrous gypsum can be used. The amount of gypsum to be used is preferably 20 parts by weight or less, more preferably 1.5 parts by weight or less, per 1 part by weight of calcium aluminate. If more than 20 parts by weight is used, it tends to cause a decrease in strength. The powderiness of gypsum cheeks is not particularly limited, but in general, a Blaine value of 1.000 i/g or more is preferable, and 3.000 to 3.000.
6,000cj/g is more preferable. The amount of water used is not particularly limited, but the total amount of calcium aluminate or calcium aluminate and gypsum is 10
It is preferably 50 to 2.000 parts by weight relative to 0 parts by weight. If it is less than 50 parts by weight, the amount of water absorbed by the superabsorbent resin will be small, and the effect of reducing ground resistance due to the existing water cannot be expected much, which is not economical. On the other hand, if the amount is more than 2,000 parts by weight, it is difficult to obtain the effects of calcium aluminate or calcium aluminate and gypsum. In the present invention, it is also possible to use a conductive substance. Examples of conductive materials include electrolyte materials such as sodium chloride, calcium chloride, and copper sulfate, carbon plaque, charcoal powder, metal powder, carbon fiber, and rope fiber. The amount of the conductive substance to be used is preferably about 0.02 to IO parts by weight per 100 parts by weight of the super absorbent resin and calcium aluminate or calcium aluminate and gypsum. By using the conductive substance in combination, The grounding resistance reduction effect is improved. The method of using the ground resistance reducing material of the present invention is not particularly limited, but for example, the diameter is 30 to 50 cm, the depth is 7
Possible methods include digging a hole of about 0 to 100 as, driving a grounding rod, and placing grounding resistance reducing material around it.
The ground resistance reducing materials may be placed into the hole in any order, but in order to improve work efficiency and the effect of reducing ground resistance, it is preferable to mix them in advance. For mixing, it is possible to use a regular mixer such as a tilting mixer or an omni mixer. [Example] The present invention will be explained below with reference to Examples. Example 1 Using the formulation shown in Table 1, the specific resistance of the resulting ground resistance reducing material was measured after kneading. The measurement results are also listed in Table 1. <Materials used> Polymer: Super absorbent resin, Sumitomo Chemical ■Product name: Sukagel J Main component: vinyl acetate-acrylic acid ester copolymer saponified product Water: Pure water CA: Calcium aluminate, C+zAt, amorphous Gypsum: semi-hydrated gypsum, grade 2 reagent: conductive material, carbon fiber, Kureha Chemical Industry ■Product name: ``Kureka Chop J Length: 25ms, diameter: 15μ Conductive material Table 1 Unit of specific resistance is (Ω・cm) After measuring the specific resistance, each cured product was immersed in water at 20°C, and none of the products disintegrated even after 7 days. Example 2 Four holes with a diameter of 50 cm and a depth of 1 mm were dug, and 1 II earth rods with a length of 1.5 mm were driven into the holes. When the ground resistance reducing material obtained in Experiment Nal-6 of Example 1 was poured into this hole and the ground resistance value was measured, it was 70Ω. [Effects of the Invention] As described above, the effects of the present invention are as follows: 1) Due to the water absorbency of the super absorbent resin, a large amount of water can be present in the cured product of the ground resistance reducing material, improving conductivity. 2) By using a super absorbent resin, a cured material for reducing ground resistance that contains a large amount of water can be obtained with a small amount of material, which is economical.
Claims (1)
する接地抵抗低減材。1) Ground resistance reducing material whose main ingredients are super absorbent resin and calcium aluminate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1228397A JP2809443B2 (en) | 1989-09-05 | 1989-09-05 | Grounding resistance reducing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1228397A JP2809443B2 (en) | 1989-09-05 | 1989-09-05 | Grounding resistance reducing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0393182A true JPH0393182A (en) | 1991-04-18 |
| JP2809443B2 JP2809443B2 (en) | 1998-10-08 |
Family
ID=16875830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1228397A Expired - Fee Related JP2809443B2 (en) | 1989-09-05 | 1989-09-05 | Grounding resistance reducing material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2809443B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS559350A (en) * | 1978-07-05 | 1980-01-23 | Denki Kagaku Kogyo Kk | Method of reducing grounding resistance |
| JPS5840383A (en) * | 1981-09-04 | 1983-03-09 | Kuraray Co Ltd | Ground resistance reducing agent |
-
1989
- 1989-09-05 JP JP1228397A patent/JP2809443B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS559350A (en) * | 1978-07-05 | 1980-01-23 | Denki Kagaku Kogyo Kk | Method of reducing grounding resistance |
| JPS5840383A (en) * | 1981-09-04 | 1983-03-09 | Kuraray Co Ltd | Ground resistance reducing agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2809443B2 (en) | 1998-10-08 |
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