JPS6219028B2 - - Google Patents
Info
- Publication number
- JPS6219028B2 JPS6219028B2 JP4727778A JP4727778A JPS6219028B2 JP S6219028 B2 JPS6219028 B2 JP S6219028B2 JP 4727778 A JP4727778 A JP 4727778A JP 4727778 A JP4727778 A JP 4727778A JP S6219028 B2 JPS6219028 B2 JP S6219028B2
- Authority
- JP
- Japan
- Prior art keywords
- water glass
- water
- insoluble
- substance
- amount
- 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
Links
- 235000019353 potassium silicate Nutrition 0.000 claims description 26
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 26
- 239000000126 substance Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 description 7
- 239000002689 soil Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- -1 MgCl 2 Chemical compound 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- 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
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- MYFXBBAEXORJNB-UHFFFAOYSA-N calcium cyanamide Chemical compound [Ca+2].[N-]=C=[N-] MYFXBBAEXORJNB-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper 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
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
- 229910000397 disodium phosphate Inorganic materials 0.000 description 1
- 235000019800 disodium phosphate Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 1
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
Description
本発明は、水ガラスを用いた接地抵抗低減法に
関するものである。
従来より、水ガラスと石膏との混合物を用い
て、接地抵抗を低減する方法が行なわれている
が、水ガラスと石膏は共に水溶性であるので、長
期の低減効果がないという欠点があつた。
本発明は、この欠点を解決したもので、水ガラ
スを不溶性化する物質と水ガラスと水ガラスに対
して５重量部量以下の水とを混合し、ゲル化させ
てから接地極周辺に存在させることを特徴とする
ものである。
本発明において、水ガラスを不溶性化する物質
とは、水ガラスと混合したときに、水ガラスを不
溶性又は難溶性のゲルとする物質であつて、これ
にはポルトランド系セメント、水硬性スラグ、ア
ルミナセメント、例えばCaO・2Al2O3、CaO・
Al2O3、12CaO・7Al2O3、3CaO・3Al2O3・
CaF2、3CaO・3Al2O3・CaSO4、3CaO・Al2O3、
11CaO・7Al2O3・CaF2等の鉱物及びこれらの組
成を有する無定形物などの水硬性カルシウムアル
ミネート、炭酸水素ナトリウム、リン酸水素ナト
リウム、亜硫酸水素ナトリウム、アルミン酸ナト
リウム、炭酸エチレン、有機酸、リン酸、硫酸、
硝酸、塩酸などがあげられ、これらを１種以上使
用することが出来る。これらの中で好ましいもの
は、ポルトランドセメント、アルミナセメント、
カルシウムアルミネート、及びスラグ等の自硬性
物質である。その理由は、他の水ガラスを不溶性
化する物質に比べて導電性が良く、地極用金属を
腐食させることがないからである。水ガラスを不
溶性化する物質の水ガラスへの混合割合は、何等
制限されたものではなく、要するに水ガラスが不
溶性又は難溶性のゲルになる量であればよい。こ
の量は、水ガラスを不溶性化する物質の種類によ
り異なる。
なお、導電性及び乾燥に対する長期耐久性を向
上させるために、水の添加量は、水ガラスに対し
て５重量倍量以下、好ましくは３重量倍量以下で
ある。５重量倍量より多いと水ガラスはゲル化し
ない。また、カーボン粉末、NaCl、MgCl2、
NH4Cl、CaCl2、KCl、石灰窒素、NaNO3、
NaNO2、尿素、鉄、銅等の金属粉末、硫酸水素
ナトリウム、硫酸銅等の導電性物質を電極の腐食
が問題とならない程度で使用するのはなおよい。
施工にあたつては、地面に直径30〜50cm程度、
深さ70cm〜１ｍ程度の穴を掘り、接地極を入れて
からそのまわりに水ガラスを不溶性化する物質と
水ガラスの混合物を投入する。該混合物は、水ガ
ラスがゲル化した直後に投入するのがよく、これ
によつて自由水が大地に吸収されることによる低
減効果の低下を少なくすることができる。また該
混合物は、単独で又は土と混合して投入する。土
の埋めもどしにあたつては、充分に締め固めを行
なつて電極との接触をよくする。この目的には注
水することは効果的である。
本発明によると、(1)長期にわたつて低減効果が
ある。(2)作業が簡単である。(3)浸透性が大である
ので、特に岩盤や砂地における低減効果が大き
い。(4)接地極の腐食が小さい。等の優れた効果を
持つものである。
次に実施例をあげてさらに説明する。
実施例 １
直径50cm、深さ75cmの穴に、直径５cm、長さ
1.5ｍの接地棒を打込み、さらに接地棒のまわり
に、浸透性をよくするために直径５cm、深さ１ｍ
程度の穴をあけた。この中に、JIS ３号水ガラス
５、水５Kg及び普通ポルトランドセメント3.3
Kgの混合物をゲル化させてから投入し、土を埋め
もどした。接地抵抗の経年変化の測定値を実験No.
１に示す。実験No.２は水のみを20投入した場合
及び実験No.３は市販品を投入した場合である。
The present invention relates to a method for reducing ground resistance using water glass. Conventionally, methods have been used to reduce ground resistance using a mixture of water glass and gypsum, but since both water glass and gypsum are water-soluble, the drawback was that there was no long-term reduction effect. . The present invention solves this drawback by mixing a substance that makes water glass insoluble, water glass, and water in an amount of 5 parts by weight or less based on the water glass, gelling it, and then forming it around the ground electrode. It is characterized by allowing In the present invention, a substance that makes water glass insoluble is a substance that turns water glass into an insoluble or slightly soluble gel when mixed with water glass, and examples thereof include Portland cement, hydraulic slag, Alumina cement, e.g. CaO・2Al 2 O 3 , CaO・
Al 2 O 3 , 12CaO・7Al 2 O 3 , 3CaO・3Al 2 O 3・
CaF 2 , 3CaO・3Al 2 O 3・CaSO 4 , 3CaO・Al 2 O 3 ,
Minerals such as 11CaO, 7Al 2 O 3 , CaF 2 and amorphous materials having these compositions, such as hydraulic calcium aluminate, sodium hydrogen carbonate, sodium hydrogen phosphate, sodium hydrogen sulfite, sodium aluminate, ethylene carbonate, organic acid, phosphoric acid, sulfuric acid,
Examples include nitric acid and hydrochloric acid, and one or more of these can be used. Preferred among these are Portland cement, alumina cement,
Self-hardening substances such as calcium aluminate and slag. The reason for this is that it has better conductivity than other substances that make water glass insoluble and does not corrode the earth electrode metal. The mixing ratio of the substance that makes water glass insoluble to water glass is not limited in any way, and it may be sufficient as long as the amount turns water glass into an insoluble or hardly soluble gel. This amount varies depending on the type of substance that makes water glass insoluble. In order to improve conductivity and long-term durability against drying, the amount of water added is at most 5 times the weight of water glass, preferably at most 3 times the weight of water glass. If the amount is more than 5 times the amount by weight, water glass will not gel. Also, carbon powder, NaCl, MgCl 2 ,
NH4Cl , CaCl2 , KCl, lime nitrogen, NaNO3 ,
It is better to use metal powders such as NaNO 2 , urea, iron, and copper, and conductive substances such as sodium hydrogen sulfate and copper sulfate to the extent that corrosion of the electrodes does not become a problem. During construction, a diameter of about 30 to 50 cm should be placed on the ground.
Dig a hole about 70cm to 1m deep, insert a ground electrode, and then pour a mixture of water glass and a substance that makes water glass insoluble around it. The mixture is preferably added immediately after the water glass has gelled, thereby reducing the reduction effect due to absorption of free water into the ground. Further, the mixture may be used alone or mixed with soil. When backfilling the soil, compact it thoroughly to ensure good contact with the electrodes. Water injection is effective for this purpose. According to the present invention, (1) there is a long-term reduction effect; (2) The work is easy. (3) Since it has high permeability, the reduction effect is particularly great in bedrock and sandy soil. (4) Corrosion of the ground electrode is small. It has excellent effects such as Next, further explanation will be given with reference to examples. Example 1 In a hole with a diameter of 50 cm and a depth of 75 cm, a hole with a diameter of 5 cm and a length of
A 1.5m grounding rod is driven in, and around the grounding rod is a 5cm diameter and 1m deep hole to improve permeability.
I made some holes. In this, JIS No. 3 water glass 5, water 5 kg and ordinary Portland cement 3.3
Kg of the mixture was gelled and then added to the soil and backfilled with soil. Experiment No.
Shown in 1. Experiment No. 2 was a case in which only water was added for 20 minutes, and Experiment No. 3 was a case in which a commercially available product was added.
【表】
実験No.１の普通ポルトランドセメントのかわり
に、アルミナセメント又はカルシウムアルミネー
トを用いて同様に試験したところ、実験No.１とほ
ぼ同等であつた。
実施例 ２
直径60cm、深さ75cmの穴に直径1.5cm、長さ1.5
ｍの接地棒を打込み、この中に、JIS・３号水ガ
ラス３及びC12A7よりなる無定形粉末（ブレー
ン4300cm2／ｇ）３Kgの混合物に表−２に示すよう
に水を添加し混合した。ゲル化後直に穴へ投入し
土を入れ充分に踏み固めた。接地抵抗値の経時変
化を測定した結果を表−２に示す。[Table] When a similar test was conducted using alumina cement or calcium aluminate instead of the ordinary Portland cement in Experiment No. 1, the results were almost the same as in Experiment No. 1. Example 2 A hole with a diameter of 60 cm and a depth of 75 cm has a diameter of 1.5 cm and a length of 1.5 cm.
Into the ground rod, add water as shown in Table 2 to a mixture of 3 kg of amorphous powder (brane 4300 cm 2 /g) consisting of JIS No. 3 water glass 3 and C 12 A 7 . Mixed. Immediately after gelatinization, it was poured into a hole, filled with soil, and thoroughly compacted. Table 2 shows the results of measuring changes in ground resistance over time.
Claims (1)
ガラスに対して５重量倍量以下の水とを混合し、
ゲル化させてから接地極周辺に存在させることを
特徴とする水ガラスを用いた接地抵抗低減法。1. Mixing a substance that makes water glass insoluble, water glass, and water in an amount not more than 5 times the weight of water glass,
A grounding resistance reduction method using water glass, which is characterized by gelling it and then placing it around the grounding electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4727778A JPS54140158A (en) | 1978-04-21 | 1978-04-21 | Earth resistance reducing method employing water glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4727778A JPS54140158A (en) | 1978-04-21 | 1978-04-21 | Earth resistance reducing method employing water glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54140158A JPS54140158A (en) | 1979-10-31 |
| JPS6219028B2 true JPS6219028B2 (en) | 1987-04-25 |
Family
ID=12770784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4727778A Granted JPS54140158A (en) | 1978-04-21 | 1978-04-21 | Earth resistance reducing method employing water glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54140158A (en) |
-
1978
- 1978-04-21 JP JP4727778A patent/JPS54140158A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54140158A (en) | 1979-10-31 |
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