KR100836554B1 - Expansion production admixture - Google Patents

Expansion production admixture Download PDF

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KR100836554B1
KR100836554B1 KR1020070002072A KR20070002072A KR100836554B1 KR 100836554 B1 KR100836554 B1 KR 100836554B1 KR 1020070002072 A KR1020070002072 A KR 1020070002072A KR 20070002072 A KR20070002072 A KR 20070002072A KR 100836554 B1 KR100836554 B1 KR 100836554B1
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weight
weight ratio
ground
grounding
fly ash
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Korean (ko)
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백남웅
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백남웅
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/66Connections with the terrestrial mass, e.g. earth plate, earth pin
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00Soil-conditioning materials or soil-stabilising materials
    • C09K17/02Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
    • C09K17/10Cements, e.g. Portland cement

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

An expansive grounding reducing agent with conductivity and a grounding member using the same are provided to be expanded according to the time elapsed to make surrounding soil in a high density and reduce the conductivity of the soil locally, thereby maximizing grounding effects. An expansive grounding reducing agent with conductivity is comprised of the followings: portland cement of 40 to 50 weight ratio, poly acrylonitrol-carbon fiber of 8 to 16 weight ratio, calcium sulfoaluminate of 12 to 18 weight ratio, ettringite of 10 to 20 weight ratio, CaSO4 of 10 weight ratio, accelerator of 1 to 4 weight ratio, fly ash of 1 to 7 weight ratio, copper slag of 5 to 20 weight ratio, powdered coal of 1 to 15 weight ratio, silica of 1 to 10 weight ratio, and steel fiber of 1 to 5 weight ratio. A plate-shaped grounding plate(10) is acquired by a combination of the above ingredients in the outside of copper(5).

Description

도전성 팽창 접지저감제 및 이를 이용한 접지부재{Expansion production admixture} Conductive Expanded Ground Reducing Agent and Grounding Material Using the Same {Expansion production admixture}

도 1은 본 발명에 의해 성형된 접지판의 사시도1 is a perspective view of a ground plate molded by the present invention

도 2는 본 발명에 의해 성형된 접지봉의 사시도Figure 2 is a perspective view of the ground rod formed by the present invention

<도면의 주요 부분에 대한 부호><Symbols of the main parts of the drawings>

5: 나동선 10: 접지판 15: 접지봉5: bare wire 10: ground plate 15: ground rod

본 발명은 낙뢰 등의 이상전압으로부터 장비와 인명을 안전하게 보호함과 동시에 접지효과를 극대화하기 위하여 지하에 매설하는 접지봉 또는 접지판의 시공과정에서 충전하는 도전성 팽창 접지저감제 및 이를 이용한 접지부재와 시공방법에 관한 것으로서, 구체적으로는 접지봉과 접지판의 외측에 형성되는 공간부에 보충시공하여 시간이 경과함에 따라 주변의 토양에 함유된 수분을 흡수함으로서 부피가 팽창된 접지극은 주변의 토양을 고밀도화시켜 국지적인 토양에 대한 도전율을 낮추 어 접지효과를 높일 수 있도록 한 도전성 팽창 접지저감제 및 이를 이용한 접지부재와 시공방법에 관한 것이다.The present invention is to protect the equipment and life from abnormal voltage, such as lightning strike, and at the same time to maximize the grounding effect, the conductive expansion ground reducing agent charged in the construction of the ground rod or ground plate buried underground, and the ground member and construction using the same It relates to a method, specifically, supplementary to the space formed on the outside of the ground rod and ground plate to absorb the moisture contained in the surrounding soil over time to expand the volume of the ground electrode to increase the density of the surrounding soil The present invention relates to a conductive expanded ground reducing agent that can increase the grounding effect by lowering the conductivity of local soil, and a grounding member and a construction method using the same.

지하에 매설되는 접지시공에 사용되는 접지저감제는 전기 전도도가 우수하여야 하며 또 토양과 일체화되어야하고 접지극 자체로서 부식 및 전식을 방지하면서 현대사회에서 중요시되는 환경에 악영향을 미치지 아니하는 친환경적인 소재이어야 한다.Grounding reducing agent used for grounding construction underground should be excellent in electrical conductivity and should be integrated with soil, and it should be an environmentally friendly material that does not adversely affect the environment important in modern society while preventing corrosion and spreading as the grounding electrode itself. do.

일반적으로 접지시공에는 동봉이나 화학저감제가 사용되며, 이는 초기접지 시공시에 수요자가 원하는 접지저항값을 용이하게 얻을 수 있으나, 일정시간이 경과되면 하기와 같은 문제점이 발생하게 되는 것이다.In general, the grounding is enclosed or chemical reducing agent is used, which can be easily obtained by the consumer to the desired ground resistance value during the initial ground construction, but the following problems occur after a certain time.

즉 동봉은 일정기간이 지나면 부식과 전식을 초래하게되며, 시멘트를 주원료로 사용하는 화학저감제는 건조수축과 경화시 발생하는 수화열에 의한 인장응력으로 인하여 균열이 발생하게 된다.That is, the enclosed rod causes corrosion and spreading after a certain period of time, and the chemical reducing agent using cement as a main material causes cracking due to tensile stress due to heat of hydration generated during drying shrinkage and hardening.

이러한 균열에 의해 누수 및 염분침투에 의한 접지극의 부식 등이 진행되어 접지값이 상승되는 요인이 되었다.Such cracking causes corrosion of the ground electrode due to leakage and salt penetration, which causes the ground value to increase.

더욱이 시간이 경과함에 따라 견고하게 경화되면서 모탈에 함유되어있는 수분의 증발에 의해 수화과정에서 생성된 시멘트겔의 체적이 감소하게 되는데, 이러한 체적의 감소로 인하여 미세한 간극이 형성되고, 이 간극으로 인하여 전류의 흐름이 차단되어 낙뢰 등의 이상전류가 주변의 토양으로 신속하게 흡수되지 못하는 치명적인 문제점이 내재되어 있는 것이다.Furthermore, as time goes by, it hardens and the volume of cement gel produced during the hydration decreases due to the evaporation of moisture contained in the mortar, which results in the formation of fine gaps. There is a fatal problem in that an abnormal current such as a lightning strike is not quickly absorbed into the surrounding soil because the current flow is blocked.

본 발명은 상기와 같은 제반의 문제점을 해소하기 위하여 제안된 것으로서, 본 발명은 도전성 몰탈의 문제점을 보완하고 접지효과를 극대화할 수 있는 도전성 팽창 접지저감제 및 접지부재를 제공하는데 주 목적이 있는 것이다.The present invention has been proposed in order to solve the above problems, the present invention is to provide a conductive expansion reducing agent and a grounding member that can supplement the problems of the conductive mortar and maximize the grounding effect. .

상기한 목적을 달성하기위하여 본 발명의 접지저감제는 포틀렌드시멘트 40~50중량%, 폴리 아크릴로 니트롤계 탄소섬유 8~16중량%, 칼슘설포 알루미네이트(CSA)12~18중량%, 에트린 가이트 10~20중량%, CaSO4 10중량%, 촉진제 1~4중량%, 플라이 에쉬 1~7중량%, 동슬래그 5~20중량%, 분탄 1~15중량%, 규사 1~10중량%, 강섬유 1~5중량%를 최적의 비율로 혼합한 구성으로 이루어진 것이다.In order to achieve the above object, the ground reducing agent of the present invention is 40 to 50% by weight of port blend cement, 8 to 16% by weight of polyacrylonitrile carbon fiber, 12 to 18% by weight of calcium sulfo aluminate (CSA), et Lean Gite 10-20 wt%, CaSO 4 10 wt%, Accelerator 1-4 wt%, Fly Ash 1-7 wt%, Copper slag 5-20 wt%, Powdered coal 1-15 wt%, Silica sand 1-10 wt% , 1 to 5% by weight of the steel fiber is composed of a mixture of the optimum ratio.

또 직경 60mm 나동선의 외표면에 포틀렌드시멘트 40~50중량%, 폴리 아크릴로 니트롤계 탄소섬유 8~16중량%, 칼슘설포 알루미네이트(CSA)12~18중량%, 에트린 가이트 10~20중량%, CaSO4 20중량%, 촉진제 1~4중량%, 플라이 에쉬 1~7중량%, 동슬래그 10~25중량%, 분탄 1~15중량%, 규사 1~10중량%, 강섬유 1~5중량%를 혼합한 접지저감제를 양생시켜 판상의 접지부재로 성형한 것이다.Another 60 mm in diameter 40-50% by weight of port blend cement, 8-16% by weight of polyacrylonitrile carbon fiber, 12-18% by weight of calcium sulfo aluminate (CSA), 10-20% by weight of ethrin guide, on the outer surface of bare copper wire 4 20% by weight, accelerators 1-4%, fly ash 1-7%, copper slag 10-25%, powdered coal 1-15%, silica sand 1-10%, steel fiber 1-5% by weight A ground reducing agent is cured and molded into a plate-like ground member.

또한 직경 60mm 나동선의 외표면에 포틀렌드시멘트 40~50중량%, 폴리 아크릴로 니트롤계 탄소섬유 8~16중량%, 칼슘설포 알루미네이트(CSA)12~18중량%, 에트린 가이트 10~20중량%, CaSO4 10중량%, 촉진제 1~4중량%, 플라이 에쉬 1~7중량%, 동슬래그 5~20중량%, 분탄 1~15중량%, 규사 1~10중량%, 강섬유 1~5중량%를 혼합한 접지저감제를 양생시켜 봉형상의 접지부재로 성형한 것이다.Also 60 mm in diameter 40-50% by weight of port blend cement, 8-16% by weight of polyacrylonitrile carbon fiber, 12-18% by weight of calcium sulfo aluminate (CSA), 10-20% by weight of ethrin guide, on the outer surface of bare copper wire4 10 wt%, accelerator 1-4 wt%, fly ash 1-7 wt%, copper slag 5-20 wt%, powdered coal 1-15 wt%, silica sand 1-10 wt%, steel fiber 1-5 wt% The ground reducing agent is cured and molded into a rod-like ground member.

이하 본 발명의 바람직한 실시예 및 이로부터 얻게 되는 특유의 효과 등에 대하여 첨부도면을 이용하여 상세히 설명하면 하기와 같다.Hereinafter, preferred embodiments of the present invention and specific effects obtained therefrom will be described in detail with reference to the accompanying drawings.

본 발명의 팽창제는 시멘트 응결경화와 팽창속도의 균형이 잘 이루어져 유효한 팽창을 일으켜야하며, 가능한 한 소량으로 필요한 팽창을 일으키고, 이 팽창은 상온에서 최저이고 1주정도 지나면 팽창이 최고값에 도달하여야하며, 팽창 후에 건조 및 수축을 감소시키는 조건을 충족하여야 한다.The expansion agent of the present invention should have a good balance between the cement condensation hardening and the expansion rate to produce an effective expansion, and the necessary expansion in a small amount as possible, this expansion is the lowest at room temperature and the expansion should reach the maximum value after one week. They must meet the conditions to reduce drying and shrinkage after expansion.

이러한 요건을 충족시키기 위하여 본 발명에서는 포틀렌드 시멘트, 폴리 아크릴로 니트롤계 탄소섬유, 칼슘설포 알루미네이트(CSA), 에트린 가이트, CaSO4, 촉진제, 플라이 에쉬, 동슬래그, 분탄, 규사, 강섬유를 최적의 비율로 혼합한 구성으로 이루어진 것이다.In order to satisfy these requirements, the present invention uses port blend cement, polyacrylonitrile carbon fiber, calcium sulfo aluminate (CSA), ethrin guide, CaSO 4 , accelerator, fly ash, copper slag, powdered coal, silica sand and steel fiber. It consists of a mixture of the mixture at the optimum ratio.

또 상기 칼슘 설포 알루미네이트는 석회, 석고, 보오크 사이트를 주성분으로하는 소성화합물을 적당한 입도가 되도록 분쇄한 것으로 3가지 주요광물로는 하기와 같다.In addition, the calcium sulfo aluminate is a pulverized plastic compound having a lime, gypsum, bauxite as a main component to a suitable particle size as three main minerals are as follows.

·아우린 3CaO. 3Al22O3 . CaSO4 Aurine 3CaO. 3Al 2 2 O 3 . CaSO 4

·유리석회 CaOGlass Lime CaO

·유리무수석회 CaSO4 Free Anhydrous Lime CaSO 4

이들 광물조성은 수화반응에 의해 생성되는 에트린 가이트(3CaO. Al2O3 . 3CaSO4. 3H2O)는 수마이크로미터 정도의 미세한 침상결정체로서, 이 결정체가 콘크리트 중의 미세공극에 충전되어 콘크리트를 팽창시키는 작용을 한다.The mineral composition is a lean eth- fine needles approximately gayiteu (3CaO. Al 2 O 3. 3CaSO 4. 3H 2 O) is several micrometers produced by the hydration reaction, the crystals are filled into the fine voids of the concrete the concrete It acts to inflate.

이와 같은 팽창은 강도증진에 따라서 생기는 팽창변형으로서 강팽창에 기여하게되는 것이다.Such expansion is contributing to the strong expansion as expansion deformation caused by the increase in strength.

그러나 이 수산화 칼슘은 아우린과 반응하여 알루민산석회 수화물로 변환전에 팽창하는 알루미늄 분말에 의한 가스발생이나 생석회의 수화에 의한 체적증가와는 본질적으로 다른 것이다.However, this calcium hydroxide is intrinsically different from the gas generation by aluminum powder that expands before conversion to aluminate lime hydrate in response to aurine or the volume increase due to hydration of quicklime.

따라서 상기 칼슘 설포 알루미네이트(CSA)를 사용한 콘크리트는 에트린 가이트의 생성에 의해 조직을 치밀화하여 건조수축을 저감하는 동시에 수밀성이 향상되는 것이다.Therefore, the concrete using the calcium sulfo aluminate (CSA) is to compact the structure by the production of ethrin guide to reduce the dry shrinkage and to improve the water-tightness.

이는 표 1은 칼슘 설포 알루미네이트 팽창재의 수화반응을 나타낸 것으로서, 먼저 최초의 유리석회의 수화반응에 의해 수산화칼슘 결정이 생성되고, 이 결정성장과의 고용체를 형성하여 감소한다. Table 1 shows the hydration reaction of the calcium sulfo aluminate expansion material, firstly, calcium hydroxide crystals are formed by the hydration reaction of the first free lime and form a solid solution with the crystal growth.

이어서 유리석고와 반응하여 에트린 가이트라는 침상결정을 생성하고, 이것이 팽창의 주체가 된다.It then reacts with the glass gypsum to produce acicular crystals called ethrin guides, which become the main cause of expansion.

수화반응과정에서 팽창을 일으키는 에트린 가이트(3CaO. Al2O3. 3H2O)는 팽창 클링커의 주요성분인 칼슘 설포 알루미네이트(3CaO. 3Al2O3. CaSO4)와 CaSO4와 CaO의 반응으로 생성되며, 일반 포틀랜드 시멘트에서는 C3A(알루민산3석회)성분과 석고가 반응하여 생성된다.Ethrinite (3CaO. Al 2 O 3. 3H 2 O), which causes swelling during the hydration reaction, is the main component of the expanded clinker of calcium sulfo aluminate (3CaO. 3Al 2 O 3. CaSO 4 ), CaSO 4 and CaO. It is produced by the reaction, and in general Portland cement, C3A (trilimate aluminate) component and gypsum react with each other.

에트린가이트는 수화반응초기에 침상결정으로 생성, 성장하여 용액 중에 황산이온이 제거되면 모노셀페이트(3CA.3CaSO4. 12H2O)로 변환된다.Ethrinite is produced and grown as acicular crystals at the beginning of the hydration reaction and is converted to monocell sulfate (3CA.3CaSO 4. 12H 2 O) when sulfate ions are removed from the solution.

팽창제가 에트린가이트를 생성할 때 이론 화학량적으로는 수축하는 것으로 계산되나 실제로는 용적증가가 생겨 팽창하게되는 것이다.When the swelling agent produces ethrinite, it is calculated by theoretical stoichiometry to contract, but in reality, volumetric expansion occurs.

이 팽창은 에트린 가이트의 생성속도와 시멘트페이스트의 수화.경화속도에 관계되고, 에트린가이트의 생성량과 시멘트 경화체 결정의 성장이 팽창력의 주 요인인 것으로 알려져 있다.This expansion is related to the rate of formation of ethrinite and the rate of hydration and hardening of cement paste. It is known that the amount of ethrinite production and the growth of hardened cement crystals are the main factors of the expansion force.

팽창제 또는 팽창성 수축보상제에 있어서의 에트린 가이트의 생성 반응식은 하기와 같이 표시된다.The reaction scheme for the production of ethrin guidee in the expanding agent or the expandable shrinkage compensator is expressed as follows.

C4A3S + 8CaSO4 + 6CaO + 96H2O → 3CaO. Al2O3 . 3CaSO4 . 32H2O C4A3S + 8CaSO 4 + 6CaO + 96H 2 O-> 3CaO. Al 2 O 3 . 3CaSO 4 . 32H 2 O

플라이 에쉬는 석탄발전소에서 분쇄기로 분쇄(200메쉬)하여 뜨거운 공기기류와 함께 고속으로 로내에 주입되어 석탄에 함유된 대부분의 광물질이 용해점 이상인 1,400 ~ 1,500℃ 온도범위에서 부유상태로 순간적으로 연소한다.Fly ash is pulverized (200 mesh) by crusher in coal power plant and injected into the furnace at high speed with hot air stream, and most of the minerals contained in coal are burned in a suspended state in the temperature range of 1,400 ~ 1,500 ℃ above the melting point. .

미세한 분말상태로 된 미분탄은 연소되어 배연가스와 함께 보일러에서 배출되어 집진기의 하부에서 포집되는 것이다.The fine powdered coal is burned and discharged from the boiler together with the flue gas to be collected in the lower part of the dust collector.

다공성 구형입자와 단단한 구형입자의 혼합물로서 가벼워서 물위에 뜨는데 이 물질을 세노소피어(Cenosphere)라 칭하며 총 플라이 에쉬의 약 2%정도 발생한다.It is a mixture of porous spherical particles and hard spherical particles that is light and floats on water. This material is called Cenosphere and generates about 2% of the total fly ash.

부연탄 플라이 에쉬는 입경이 크고, 입자표면이 매끄러운 반면 유연탄 플라이 에쉬는 미세하지만 표면이 거칠거칠하다.Coal briquette fly ash has a large particle diameter and smooth particle surface, while bituminous coal fly ash is fine but rough surface.

플라이 에쉬의 비중은 1.9 ~ 2.3정도이며 시멘트비중의 약 2/3정도에 해당되는 것으로, 플라이에쉬 중 미연탄소는 콘크리트내에서 공기연행제를 흡착하므로 더 많은 양의 촉진제를 소요하며, 동일한 공기량에서 플라이 에쉬 중에 미연탄소량이 많으면 강도가 감소하게되는 것이다.The specific gravity of fly ash ranges from 1.9 to 2.3, which is about 2/3 of the specific gravity of cement. Unburned carbon in fly ash absorbs the air entrainer in concrete, so it requires a larger amount of accelerators. If the amount of unburned carbon in the fly ash is high, the strength is reduced.

이러한 플라이 에쉬는 상술한 바와 같이 미분탄이 연소된 후 용융성분이 냉각되어 생긴것으로 입자의 대부분의 표면적이 미끄러운 구 형상으로 되어있으며, 콘크리트 혼합시 골재와 접촉면에서 볼베어링 작용을 하여 시멘트의 일부로 치환하여 사용할 경우 일반적으로 소요 반죽농도를 얻기 위한 단위수량 및 물시멘트비도 감소시킬 수 있게 되는 것이다.Such fly ash is formed by burning molten component after combustion of pulverized coal as described above, and the surface area of most particles has a slippery spherical shape. When concrete mixing, it is used to replace a part of cement by ball bearing at the contact surface with aggregate. In general, it is possible to reduce the unit quantity and the water cement ratio to obtain the required dough concentration.

플라이 에쉬를 콘크리트에 첨가할 경우 미립자의 영향에 의한 공기포의 감소와 함께 특히 촉진제를 사용할 경우 미연소탄소에 촉진제가 흡착함으로서 촉진제의 농도가 감소되기 때문에 시멘트의 일부를 프라이 에쉬로 대체한 콘크리트의 경우 소용의 공기량을 얻기 위하여 이의 사용량을 증가시켜 주여야 한다.When fly ash is added to concrete, air bubbles are reduced by the influence of particulates, and the accelerator concentration is reduced by adsorbing the promoter to unburned carbon, especially when accelerator is used. In this case, the amount of air used must be increased to obtain the required amount of air.

또한 플라이에쉬를 사용한 콘크리트의 강도는 이를 사용하지않은 콘크리트에 비해 감소하나 장기적으로는 상당히 증가한다.In addition, the strength of concrete using fly ash is reduced compared to concrete without it, but in the long run it increases significantly.

이는 플라이에쉬의 가용성 SiO는 시멘트 수화시 생성되는 수산화칼슘 Ca(OH)2과 상온에서 서서히 혼합하여 불용성의 안정된 규산칼슘(3CaO. SiO3 . H2O)을 생성시켜 장기 압축강도를 증가시키기 때문이다.This is because by slowly mixing in the calcium hydroxide Ca (OH) 2 and the temperature produced when cement is soluble SiO plies Ashton hydration by creating a stable calcium silicate in the water-insoluble (3CaO. SiO 3. H 2 O) to increase the long-term compressive strength .

플라이 에쉬의 혼용에 의한 콘크리트의 장기 강도증진효과는 인장강도에서 현저한데 재령 10년된 시험포장 슬리브로부터 코아편을 채취하여 시험한 결과에 의하면 압축강도는 120%, 인장강도는 150% 정도로 증가된 것을 확인할 수 있었다.The long-term strength-improving effect of concrete due to the mixing of fly ash is remarkable in tensile strength. According to the test results of coarse specimens from 10-year-old test packaging sleeve, the compressive strength was increased by 120% and tensile strength by 150%. I could confirm it.

이는 플라이에쉬와 시멘트 경화제의 경계면이 포졸란 반응 생성물로 충전되어 상호간의 결합이 강화되었기 때문이다.This is because the interface between the fly ash and the cement hardener is filled with the pozzolanic reaction product to strengthen the bonds between them.

또한 플라이 에쉬의 사용으로 단위수량이 감소되기 때문에 플라이 에쉬 콘크리트의 건조수축은 플라이 에쉬를 사용하지 않은 콘크리트보다 오히려 감소될 수 있고 또 감소정도는 플라이 에쉬 혼입율에 비례하게 되는 것이다.In addition, the dry shrinkage of the fly ash concrete can be reduced rather than the concrete without the fly ash, and the decrease is proportional to the fly ash content.

그리고 플라이 에쉬의 분말도가 높을수록 혼입율이 클수록 재령이 증가함에 따라 내특수성이 증대된다.The higher the fly ash powder, the higher the mixing ratio, and the higher the age, so that the specific resistance increases.

플라이 에쉬를 사용한 콘크리트의 시험결과 포틀랜드 시멘트만을 사용한 보통 콘크리트와 비교하여 플라이 에쉬를 25~30% 대체한 콘크리트의 특수 계수값이 훨씬 작은 결과를 나타내고 있는 것이다.Test results for concrete using fly ash show that the special modulus of concrete with 25% to 30% replacement of fly ash is much smaller than that of ordinary concrete using only Portland cement.

상기와 같이 각 물질의 고유특성을 갖는 배합비율은 포틀랜드시멘트 40~40중량%, 폴리 아크릴로 니트롤계 탄소섬유 8~16중량%, 칼슘설포 알루미네이트(CSA) 12~18중량%, 에트린 가이트 10~20중량%, CaCO4 10중량%, A.E 포츠담 1~4중량%, 플라이에쉬 1~7중량%, 동슬래그 5~20중량%, 분탄 1~15중량%, 규사 1~10중량%, 강섬유 1~5중량%를 최적의 비율로 배합하여 이를 접지극 시공시에 주입하는 몰탈로서 이용하게되면 팽창재의 특성과 도전성 콘크리트의 특성을 고려해 종래의 도전성 몰탈의 경화시 체적의 감소와 균열의 문제점을 보완하고 아울러 접지전극과 주변의 토양의 접촉저항을 고밀도화시켜 접지극으로서의 기능이 향상되는 것이다.As described above, the compounding ratio having the intrinsic properties of each material is 40 to 40% by weight of Portland cement, 8 to 16% by weight of polyacrylonitrile carbon fiber, 12 to 18% by weight of calcium sulfo aluminate (CSA), and ethrin guide 10-20 wt%, CaCO 4 10 wt%, AE Potsdam 1-4 wt%, Fly Ash 1-7 wt%, Copper slag 5-20 wt%, Coal coal 1-15 wt%, Silica sand 1-10 wt%, When 1 ~ 5% by weight of steel fiber is mixed in the optimum ratio and used as mortar to be injected during the construction of the ground electrode, it is possible to reduce the volume and the problem of cracking during the conventional hardening of the conductive mortar in consideration of the properties of the expanded material and the conductive concrete. In addition, by increasing the contact resistance of the ground electrode and the surrounding soil, the function as a ground electrode is improved.

본 발명을 대지에 직접시공하여 실험을 행하였다. 내경 100, 접지체 각각의 이격거리 2m, 굴착깊이 1m로 만든 후, 홀 안에 포틀랜드 시멘트 40~50중량%, 폴리아크릴로 니트롤계 탄소섬유 8~16중량%, 칼슘 설포 알루미네이트(CSA)12~18중량%, 에트린가이트 10~20중량%, CaSO4 10중량%, 촉진제 1~4중량%, 플라이에쉬 1~7중량%, 동슬래그 5~20중량%, 분탄 1~15중량%, 규사 1~10중량%, 강섬유 1~5중량%를 최적의 비율로 배합하여 이를 굴착한 3개의 홀 안에 각각 주입한 후 접지선을 인출한 후 70일 결과에 따른 접지저항값을 측정하였다.The experiment was carried out by constructing the present invention directly on the ground. After making the inner diameter 100, the distance of 2m of each grounding body, the excavation depth of 1m, 40 to 50% by weight of Portland cement, 8 to 16% by weight of polyacrylonitrile carbon fiber, 12 to 20% calcium sulfo aluminate (CSA) 18% by weight, 10-20% by weight of ethringite, 10% by weight of CaSO 4 , 1-4 % by weight of accelerator, 1-7% by weight of fly ash, 5-20% by weight of copper slag, 1-15% by weight of coal dust 1 to 10% by weight, and 1 to 5% by weight of steel fiber were mixed at the optimum ratio and injected into each of the three excavated holes, and then the ground wire was drawn and the ground resistance value was measured according to the result of 70 days.

그 결과 표 1에서와 같이, 대지적용시 접지측정표처럼 접지값은 시간이 경과되면서 감소됨을 확인하였다.As a result, as shown in Table 1, it is confirmed that the ground value decreases over time as the ground measurement table when the ground is applied.

<표 1>TABLE 1

1그룹   1 group 감소비율 Reduction ratio -20.5%  -20.5%

이러한 실험결과에 의해 도전성 팽창저감재가 토양속의 수분을 흡수하여 토양과의 고밀도화 되므로서 접지저항값을 감소시킴을 입증한 것이다.These results demonstrate that the conductive expansion reducing material absorbs moisture in the soil, densifying it with the soil, thereby reducing the ground resistance.

한편 상기한 물질로 이루어진 접지저감제를 이용하여 판상의 접지판과 봉형상의 접지봉으로 성형하여 지하에 매설하여 접지시공을 행하게되는 것이다.On the other hand, by using a grounding reducing agent made of the above-mentioned material is formed into a plate-like ground plate and a rod-shaped ground rod to be buried underground to perform the grounding construction.

이러한 판상 및 봉형상의 접지부재는 도 1에 도시한 바와 같이, 내측 중앙에 직경 60mm의 나동선(5)을 위치시키고, 상기 나동선의 외측에 포틀랜드 시멘트 40~50중량%, 폴리아크릴로 니트롤계 탄소섬유 8~16중량%, 칼슘 설포 알루미네이트(CSA)12~18중량%, 에트린 가이트 10~20중량%, CaSO4 10중량%, 촉진제 1~4중량%, 플라이에쉬 1~7중량%, 동슬래그 5~20중량%, 분탄 1~15중량%, 규사 1~10중량%, 강섬유 1~5중량%를 배합하여 성형하여 판형상의 접지판(10)을 얻게 되는 것이다.Such a plate-like and bar-shaped grounding member has a bare copper wire 5 having a diameter of 60 mm at the inner center, and 40 to 50% by weight of portland cement and a polyacrylonitrile carbon fiber at the outer side of the bare wire. 8-16% by weight, 12-18% by weight of calcium sulfo aluminate (CSA), 10-20% by weight of ethrinite, 10% by weight of CaSO 4 , 1-4 % by weight of accelerator, 1-7% by weight of fly ash, copper 5 to 20% by weight of slag, 1 to 15% by weight of coal, 1 to 10% by weight of silica sand, and 1 to 5% by weight of steel fibers are mixed and molded to obtain a plate-like ground plate 10.

상기와 같이 성형된 접지부재를 대지에 직접시공하여 실험을 행하였다. 내경 100, 접지체 각각의 이격거리 2m, 굴착깊이 1m로 만든 후, 홀 안에 판형성상 접지판을 시공한 후 접지선을 인출한 후 70일 결과에 따른 접지저항값을 측정하였다.The experiment was performed by directly constructing the ground member formed as described above on the ground. After making the inner diameter 100, the separation distance 2m and the excavation depth of 1m, the ground plate was formed in the hole and the ground wire was drawn, and then the ground resistance value was measured according to the result of 70 days.

그 결과 표 2에서와 같이, 대지적용시 접지측정표처럼 접지값은 시간이 경과되면서 감소됨을 확인하였다.As a result, as shown in Table 2, it is confirmed that the ground value decreases over time as the ground measurement table when the ground is applied.

<표 2>TABLE 2

1그룹1 group 2그룹2 groups 3그룹 3 groups 감소비율Reduction ratio -37.1%-37.1% -23.6%-23.6% -26.5% -26.5% 전체감소비율Overall reduction rate -29.1%-29.1%

이러한 실험결과에 의해 도전성 접지저감제가 토양속의 수분을 흡수하여 토양과의 고밀도화 되므로서 접지저항값을 감소시킴을 입증한 것이다.These experimental results demonstrate that the conductive grounding reducer absorbs moisture in the soil, densifying it with the soil, thereby reducing the ground resistance.

또 상기와 동일한 방법으로 나동선(5)의 외표면에 접지저감제를 양생시킨 봉형상의 접지봉(15)을 시공한 후 접지선을 인출한 후 70일 결과에 따른 접지저항값을 측정하였다.In addition, after constructing a rod-shaped ground rod 15 cured with a grounding reducing agent on the outer surface of the bare copper wire 5, the grounding resistance value was measured after taking out the grounding wire.

그 결과 표 3에서와 같이, 대지적용시 접지측정표처럼 접지값은 시간이 경과 되면서 감소됨을 확인하였다.As a result, as shown in Table 3, it is confirmed that the ground value decreases with time as the ground measurement table when applying the earth.

<표 3>TABLE 3

1그룹     1 group 2그룹     2 groups 3그룹    3 groups 감소비율   Reduction ratio -47.6%    -47.6% -12.5%    -12.5% -25.8%   -25.8% 전체감소비율  Overall reduction rate -28.6%                     -28.6%

이러한 실험결과에 의해 도전성 접지저감제가 토양속의 수분을 흡수하여 토양과의 고밀도화 되므로서 접지저항값을 감소시킴을 입증한 것이다.These experimental results demonstrate that the conductive grounding reducer absorbs moisture in the soil, densifying it with the soil, thereby reducing the ground resistance.

상술한 바와 같이 본 발명에 의하면 접지극의 시공시에 타설되어 시간이 경과함에 따라 부피가 팽창되어 주변의 토양을 고밀도화시켜 국지적인 토양에 대한 도전율을 낮추어 접지효과를 극대화할 수 있는 유용한 발명인 것이다.As described above, according to the present invention, it is a useful invention that maximizes the grounding effect by lowering the conductivity of local soil by increasing the volume of the surrounding soil by swelling in time when the ground electrode is placed.

Claims (3)

포틀렌드시멘트 40~50중량%, 폴리 아크릴로 니트롤계 탄소섬유 8~16중량%, 칼슘설포 알루미네이트(CSA)12~18중량%, 에트린 가이트 10~20중량%, CaSO4 10중량%, 촉진제 1~4중량%, 플라이 에쉬 1~7중량%, 동슬래그 5~20중량%, 분탄 1~15중량%, 규사 1~10중량%, 강섬유 1~5중량%를 혼합한 구성으로 이루어진 도전성 팽창 접지저감제.40 to 50% by weight of port blend cement, 8 to 16% by weight of polyacrylonitrile carbon fiber, 12 to 18% by weight of calcium sulfo aluminate (CSA), 10 to 20% by weight of ethrinite, 10% by weight of CaSO 4 , Conductive consisting of a mixture of 1 to 4% by weight of accelerator, 1 to 7% by weight of fly ash, 5 to 20% by weight of copper slag, 1 to 15% by weight of powdered coal, 1 to 10% by weight of silica sand, and 1 to 5% by weight of steel fiber Expansion grounding agent. 직경 60mm의 나동선의 외표면에 포틀렌드시멘트 40~50중량%, 폴리 아크릴로 니트롤계 탄소섬유 8~16중량%, 칼슘설포 알루미네이트(CSA)12~18중량%, 에트린 가이트 10~20중량%, CaSO4 10중량%, 촉진제 1~4중량%, 플라이 에쉬 1~7중량%, 동슬래그 5~20중량%, 분탄 1~15중량%, 규사 1~10중량%, 강섬유 1~5중량%로 이루어진 접지저감제를 양생시켜 가로 1000cm, 세로200cm, 높이 40cm의 크기를 갖는 판상의 접지판으로 성형한 접지부재.40 to 50% by weight of port blend cement, 8 to 16% by weight of polyacrylonitrile carbon fiber, 12 to 18% by weight of calcium sulfo aluminate (CSA) and 10 to 20% by weight of ethrin guide on the outer surface of 60mm diameter copper wire %, CaSO 4 10 wt%, accelerator 1-4 wt%, fly ash 1-7 wt%, copper slag 5-20 wt%, powdered coal 1-15 wt%, silica sand 1-10 wt%, steel fiber 1-5 wt% A grounding member formed of a plate-shaped ground plate having a size of 1000 cm wide, 200 cm long and 40 cm high by curing a ground reducing agent composed of%. 직경 60mm의 나동선의 외표면에 포틀렌드시멘트 40~50중량%, 폴리 아크릴로 니트롤계 탄소섬유 8~16중량%, 칼슘설포 알루미네이트(CSA)12~18중량%, 에트린 가이트 10~20중량%, CaSO4 10중량%, 촉진제 1~4중량%, 플라이 에쉬 1~7중량%, 동슬래그 5~20중량%, 분탄 1~15중량%, 규사 1~10중량%, 강섬유 1~5중량%로 이루어진 접지저감재를 양생시켜 직경 100cm, 높이 1000cm의 크기를 갖는 봉형상의 접지봉으로 성형한 접지부재.40 to 50% by weight of port blend cement, 8 to 16% by weight of polyacrylonitrile carbon fiber, 12 to 18% by weight of calcium sulfo aluminate (CSA) and 10 to 20% by weight of ethrin guide on the outer surface of 60mm diameter copper wire %, CaSO 4 10 wt%, accelerator 1-4 wt%, fly ash 1-7 wt%, copper slag 5-20 wt%, powdered coal 1-15 wt%, silica sand 1-10 wt%, steel fiber 1-5 wt% A ground member formed of a rod-shaped ground rod having a diameter of 100 cm and a height of 1000 cm by curing a ground reducing material made of%.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100907699B1 (en) 2008-09-23 2009-07-14 박종수 Ground plate
KR101061475B1 (en) 2008-11-17 2011-09-21 케이에스지티(주) eletric ground plate
KR101386520B1 (en) 2013-03-29 2014-04-21 동양산전 주식회사 Ground rod
KR20150083594A (en) 2014-01-10 2015-07-20 ㈜익성텍 extrusion process concrete grounding rod for fly-ash and manufacturing process using the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003095720A (en) 2001-09-27 2003-04-03 Denki Kagaku Kogyo Kk Cement admixture, and cement composition
KR20060027960A (en) * 2004-09-24 2006-03-29 조삼현 Material for reducing ground resistance
KR20060054762A (en) * 2004-11-16 2006-05-23 동양산전 주식회사 Ground rod installation method of electric pole

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003095720A (en) 2001-09-27 2003-04-03 Denki Kagaku Kogyo Kk Cement admixture, and cement composition
KR20060027960A (en) * 2004-09-24 2006-03-29 조삼현 Material for reducing ground resistance
KR20060054762A (en) * 2004-11-16 2006-05-23 동양산전 주식회사 Ground rod installation method of electric pole

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100907699B1 (en) 2008-09-23 2009-07-14 박종수 Ground plate
KR101061475B1 (en) 2008-11-17 2011-09-21 케이에스지티(주) eletric ground plate
KR101386520B1 (en) 2013-03-29 2014-04-21 동양산전 주식회사 Ground rod
KR20150083594A (en) 2014-01-10 2015-07-20 ㈜익성텍 extrusion process concrete grounding rod for fly-ash and manufacturing process using the same

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