KR20010064830A - Conductive cement composition having excellent soil adhesion and hardened material constructed from the composition - Google Patents

Conductive cement composition having excellent soil adhesion and hardened material constructed from the composition Download PDF

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KR20010064830A
KR20010064830A KR1019990059187A KR19990059187A KR20010064830A KR 20010064830 A KR20010064830 A KR 20010064830A KR 1019990059187 A KR1019990059187 A KR 1019990059187A KR 19990059187 A KR19990059187 A KR 19990059187A KR 20010064830 A KR20010064830 A KR 20010064830A
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weight
soil
conductive
cement composition
composition
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KR1019990059187A
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Korean (ko)
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KR100363802B1 (en
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안상욱
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김남호
(주) 지오시스
오구라 아사오
다이토코우교우가부시끼가이샤
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    • 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
    • C04B11/00—Calcium sulfate cements
    • 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
    • C04B28/06—Aluminous cements
    • C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
    • 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

Abstract

PURPOSE: A conductive cement composition having excellent adhesibility with soil is provided, which keeps the conductibility and minimizes the contact resistance with the soil. And a conductive hardened body prepared therefrom is also provided. CONSTITUTION: The conductive cement composition comprises: (i) 100 part by weight of soil binding agent comprising 10-40 wt.% of clinker powder which is mainly composed of calcium sulpho-aluminate mineral, 1-30 wt.% of portland cement, 10-40 wt.% of quicklime or calcium hydroxide, 5-30 wt.% of anhydrite and 0.1-2.0 wt.% of fluosilicate; (ii) 0.1-2 part by weight of admixture; and (iii) 0.5-2 part by weight of carbon fiber. The conductive hardened body is prepared by mixing the conductive cement composition with filler and then hardening the mixture by hydration.

Description

토양과의 접착력이 우수한 도전성 시멘트 조성물 및 그 조성물로 제조되는 도전성 경화체{Conductive cement composition having excellent soil adhesion and hardened material constructed from the composition}Conductive cement composition having excellent soil adhesion and hardened material constructed from the composition

본 발명은 도전성 시멘트 조성물 및 그 조성물로 제조되는 도전성 경화체에 관한 것으로, 좀 더 상세하게는 도전성 경화체 자체의 전도성도 양호하게 유지하면서 토양과의 접촉저항을 최소화하여 낮은 저항치를 얻을 수 있는 토양과의 접착력이 우수한 도전성 시멘트 조성물 및 그 조성물로 제조되는 도전성 경화체에 관한 것이다.The present invention relates to a conductive cement composition and a conductive cured body prepared from the composition. More particularly, the present invention relates to a conductive cement composition and a conductive cured body made of the composition. The present invention relates to a conductive cement composition having excellent adhesion and a conductive cured product made of the composition.

일반적으로, 낙뢰로 인해 전기설비에서 발생되는 이상전압이나 지락고장에 의한 고장전류가 전기설비에 유입되었을 때, 이로 인한 전기설비의 구내 및 주변에 전위 상승이 발생하게 된다. 이러한 대지전위의 상승을 효과적으로 억제하고, 고장전류의 전로를 제어하는 등의 적절한 대책을 수립하여 인체나 설비를 보호하기 위한 목적으로 통상 접지를 행한다.In general, when an abnormal voltage generated in an electrical installation due to a lightning strike or a fault current caused by a ground fault enters the electrical installation, a potential rise occurs in and around the electrical installation. Grounding is usually performed for the purpose of effectively suppressing the rise of the ground potential, establishing appropriate measures such as controlling the path of the fault current, and protecting the human body and the equipment.

접지란 대지와 전기설비를 전기적으로 접속하는 것인데, 실질적으로 낮은 저항값을 요구하게 된다. 접지저항은 접지전극 주위의 토양저항, 접지전극의 도체저항 및 접지전극 표면과 토양과의 접촉저항의 3가지 구성요소로 이루어져 있다.Grounding is the electrical connection between the earth and the electrical equipment, which requires a substantially low resistance value. Ground resistance consists of three components: soil resistance around the ground electrode, conductor resistance of the ground electrode, and contact resistance between the ground electrode surface and the soil.

접지전극 주위의 토양저항은 대부분이 현장의 토양상태에 따라 좌우되는데, 토양의 저항을 낮추기 위하여 화학저감제가 개발되어 사용되고 있다.The soil resistance around the ground electrode depends mostly on the soil condition of the site, and chemical reducing agents have been developed and used to lower the soil resistance.

그러나, 화학저감제는 시공후 빗물이나 지하수에 유실되어 그 효과가 한시적이고 구성성분이 토양으로 용출되어 주변환경을 오염시킬 수 있으므로 현재는 그 사용량이 점점 줄어들고 있는 실정이다.However, since the chemical reducing agent is lost in rainwater or groundwater after construction, its effect is temporary and its components can be eluted into the soil and pollute the surrounding environment.

접지저항을 낮추기 위한 또 다른 방법으로는 시멘트계 저감제가 개발되어 사용되고 있는데, 이것은 접지전극을 확대시켜서 저항을 낮추는 방법이다. 시멘트계 저감제는 주로 접지전극 자체의 도체저항을 낮추는데 기술의 초점이 맞추어져 있어 이것도 그 한계가 있다.Another method for lowering the ground resistance has been developed and used cement-based reducing agent, which is to reduce the resistance by expanding the ground electrode. Cement-based reducing agents are mainly focused on lowering the conductor resistance of the grounding electrode itself, and this also has its limitations.

실제로 접지의 구성요소를 살펴보면 토양의 저항율이 가장 큰 인자인데, 이것은 인위적인 제어가 어렵고 접지전극 자체의 도체저항보다는 접지전극과 토양과의 접촉저항이 접지저항에 좀 더 큰 영향을 미친다는 것이 알려져 있다.In fact, when looking at the components of the ground, the soil resistivity is the biggest factor, which is difficult to control artificially, and it is known that the contact resistance between the ground electrode and the soil has a greater influence on the ground resistance than the conductor resistance of the ground electrode itself. .

본 발명은 상기와 같은 제반 문제점을 해결하고자 안출된 것으로, 본 발명의 목적은 토양과의 접착력이 우수한 재료를 결합재로 사용하여 전극자체의 전도성도 양호하게 유지하면서 토양과의 접촉저항을 최소화하여 낮은 저항치를 얻을 수 있는 토양과의 접착력이 우수한 도전성 시멘트 조성물을 제공하는 것이다.The present invention has been made to solve the above problems, an object of the present invention by using a material with excellent adhesion to the soil as a binder to minimize the contact resistance with the soil while maintaining a good conductivity of the electrode itself is low It is to provide a conductive cement composition having excellent adhesion to soil capable of obtaining resistance.

본 발명의 또 다른 목적은 상기 도전성 시멘트 조성물과 충전재를 혼합하여 수화에 의해 경화시켜 제조되는 도전성 경화체를 제공하는 것이다.Still another object of the present invention is to provide a conductive cured product prepared by mixing the conductive cement composition and a filler to cure by hydration.

상술한 목적을 달성하기 위하여, 본 발명의 도전성 시멘트 조성물은 칼슘설포알루미네이트계(calcium sulpho-aluminate, CSA라고도 칭함) 광물을 주성분으로 하는 클링커 분말 10∼40중량%, 포틀랜드 시멘트 1∼30중량%, 생석회 또는 소석회 10∼40중량%, 무수석고 5∼30중량%, 규불화염 0.1∼2.0중량%로 구성되는 토양 결합재 100중량%와, 토양결합재 100중량부에 대하여 혼화제 0.1∼2중량부, 탄소섬유 0.5∼2중량부를 각각 포함하는 것을 특징으로 한다.In order to achieve the above object, the conductive cement composition of the present invention is 10 to 40% by weight clinker powder based on calcium sulpho-aluminate (also called CSA) mineral, 1 to 30% by weight of Portland cement , 100% by weight of soil binder composed of 10-40% by weight of quicklime or slaked lime, 5-30% by weight of anhydrous gypsum, 0.1-2.0% by weight of siliceous salt, and 0.1-2 parts by weight of admixture based on 100 parts by weight of soil binder. It is characterized by including 0.5 to 2 parts by weight of fibers, respectively.

부가적으로, 상기 탄소섬유의 균일한 분산과 경화체의 물성증진을 위하여 상기 도전성 시멘트 조성물에는 토양 결합재 100중량부에 대하여 5∼30중량부의 골재가 더 포함되는 것이 바람직하다.In addition, in order to uniformly disperse the carbon fibers and improve physical properties of the cured product, the conductive cement composition may further include 5 to 30 parts by weight of aggregate based on 100 parts by weight of the soil binder.

이하, 본 발명의 도전성 시멘트 조성물과 그 조성물로 제조되는 도전성 경화체를 좀 더 구체적으로 설명하기로 한다.Hereinafter, the conductive cement composition of the present invention and the conductive cured product prepared from the composition will be described in more detail.

본 발명의 도전성 시멘트 조성물은 크게 토양결합재, 탄소섬유, 혼화제로 구성된다.The conductive cement composition of the present invention is largely composed of soil binder, carbon fiber, admixture.

먼저 토양과의 결합을 위하여 사용되는 결합재로는 칼슘설포알루미네이트계 광물을 주성분으로 하는 속경성 클링커에 포틀랜드 시멘트, 석회, 석고 및 반응촉진제를 첨가하여 구성된다.First, the binder used for bonding with the soil is composed of the addition of portland cement, lime, gypsum and a reaction accelerator to a fast-hard clinker mainly composed of calcium sulfoaluminate-based minerals.

본 발명은 상기의 과제를 해결하기 위하여, 칼슘설포알루미네이트계 광물을 주성분으로 하는 클링커 분말 10∼40중량%, 포틀랜드 시멘트 1∼30중량%, 생석회 또는 소석회 10∼40중량%, 무수석고 5∼30중량%, 규불화염 0.1∼2.0중량%로 구성되는 분말상의 고강도 및 속경형 토양결합재이다.The present invention, in order to solve the above problems, 10 to 40% by weight of clinker powder containing calcium sulfoaluminate-based minerals, 1 to 30% by weight of Portland cement, 10 to 40% by weight of quicklime or slaked lime, 5 to 5% of anhydrous gypsum It is a powdery high strength and fast solid soil binder composed of 30% by weight and 0.1 to 2.0% by weight of a siliceous salt.

본 발명에 있어서, 칼슘설포알루미네이트계 광물은 3CaO·3Al2O3·CaSO4성분을 50중량% 이상을 함유하고 있는 클링커이며, 속경성을 갖도록 하기 위하여 수화시에 포틀랜드 시멘트, 생석회 또는 소석회 및 무수석고와 반응함으로써 에트링자이트 또는 모노설페이트를 형성한다. 이 수화물은 결합수가 많고 고강도 특성을 가지고 있으며, 유기물의 존재하에 있어서도 생성되기 때문에 본 발명의 용도 및 목적에 적합하다. 분말의 입도는 블레인 비표면적으로 3,000∼6,000cm2/g이 가능하며, 4,000±500cm2/g이 가장 좋다. 칼슘설포알루미네이트계 광물의 블레인 비표면적은 초기의 반응속도에 영향을 미치며, 비표면적이 높을수록 빠른 반응속도를 나타낸다.In the present invention, the calcium sulfoaluminate-based mineral is a clinker containing 50 wt% or more of 3CaO.3Al 2 O 3 .CaSO 4 component, and has a portland cement, quicklime or calcined lime during hydration so as to have a fast hardness. React with anhydrous gypsum to form ettringite or monosulfate. This hydrate is suitable for the use and purpose of the present invention because it has a large number of bonds, has high strength properties, and is produced even in the presence of organic matter. The particle size of the powder is capable of 3,000~6,000cm 2 / g in Blaine specific surface area and, 4,000 ± 500cm 2 / g the best. Blaine specific surface area of calcium sulfoaluminate minerals affect the initial reaction rate, and the higher the specific surface area, the faster the reaction rate.

본 발명의 무수석고는 반수석고나 이수석고와 비교하여 용해속도가 느리기 때문에 칼슘설포알루미네이트계 광물과의 반응성에 적합하고 이것이 고강도 및 고화된 토양체의 안정성에 기인한다. 무수석고는 칼슘설포알루미네이트계 광물, 생석회 또는 소석회와 반응하여 에트링자이트를 형성하기 위하여 배합량을 칼슘설포알루미네이트계 광물, 생석회 또는 소석회의 양에 의해서 결정되지만, 칼슘설포알루미네이트계 광물/무수석고 중량비가 1 이상 3이하로 하며 2.5±0.1이 가장 바람직하다. 이 칼슘설포알루미네이트계 광물/무수석고 비는 장기 재령에서의 안정성(치수 안정성) 및 내구성에 영향을 미치며, 고강도를 발현하는데 큰 기여를 한다. 본 발명에서 사용한 천연무수석고는 II형 무수석고이며, 분말의 입도는 블레인 비표면적으로 3,000∼8,000cm2/g이다.Anhydrous gypsum of the present invention is suitable for reactivity with calcium sulfoaluminate minerals because of its slow dissolution rate compared to hemihydrate gypsum and dihydrate gypsum, which is due to the high strength and stability of the solidified soil body. Anhydrous gypsum is determined by the amount of calcium sulfoaluminate mineral, quicklime or hydrated lime to react with calcium sulfoaluminate mineral, quicklime or hydrated lime to form ettringite, but calcium sulfoaluminate mineral / Anhydrous gypsum weight ratio of 1 or more and 3 or less, 2.5 ± 0.1 is most preferred. This calcium sulfoaluminate mineral / anhydrite-based ratio affects stability (dimension stability) and durability at long-term age and contributes to the development of high strength. The natural anhydrite gypsum used in the present invention is type II anhydrous gypsum, and the particle size of the powder is 3,000 to 8,000 cm 2 / g of the specific surface area of the brain.

생석회 또는 소석회를 이용하는 것은 이로부터 포졸란 반응에 의한 수화물을 생성하여 강도 발현에 기여할 뿐만 아니라, 생석회는 초기에 반응하여 발열하며, 수산화칼슘을 형성함으로써 토양의 함수비를 저감시켜 초기 강도 확보와 함께 건조수축에 의한 균열방지에도 도움을 주므로 소석회보다는 생석회를 사용하는 것이 유리하다.The use of quicklime or hydrated lime not only contributes to strength development by generating a hydrate by the pozzolanic reaction, but also quicklime reacts and generates heat, and forms calcium hydroxide to reduce the water content of the soil, thus securing initial strength and drying shrinkage. It also helps to prevent cracking by using quicklime rather than slaked lime.

규불화염은 칼슘설포알루미네이트계 광물과의 수화반응을 경화가 되는 시점 이후에서부터 촉진시키는 것과 더불어 토양으로부터 장기적으로 용출되는 실리카(SiO2), 알루미나(Al2O3)의 성분의 용출속도를 촉진시킴으로써 포졸란 반응을 앞당기는 것이 가능하다. 이로써 특히 초기재령에서의 고강도에 기인한다. 본 발명에서의 규불화염은 K2SiF6, MgSiF6, NaSiF6을 사용할 수 있는데, 그중 K2SiF6의 효과가 가장 좋다.Silica fluoride promotes the hydration reaction with calcium sulfoaluminate minerals from the time of curing, and also accelerates the dissolution rate of the components of silica (SiO 2 ) and alumina (Al 2 O 3 ) that are eluted from the soil for a long time. It is possible to speed up the pozzolanic reaction. This is due in particular to high strength at early age. In the present invention, the silofluoride salt may be K 2 SiF 6 , MgSiF 6 , NaSiF 6 , of which K 2 SiF 6 has the best effect.

본 발명의 토양 첨가재의 특징적인 반응을 설명하면 다음과 같다.Referring to the characteristic reaction of the soil additive of the present invention is as follows.

첫째, 다량의 에트링자이트를 생성한다. 에트링자이트는 다량의 수분을 결합수로 가지고 있기 때문에 물비를 저항시켜 토양인자의 이동을 구속하고 결합이 가능한 상태로 만든다. 본 발명의 고화재에서는 규불화염을 첨가함으로써 이러한에트링자이트의 수화속도를 촉진하였다.First, it produces a large amount of ettringite. Ettlingite has a large amount of water as binding water, so it resists water costs and constrains the movement of soil factors and makes it possible to bond. In the solidified material of the present invention, the hydration rate of such ettringite is accelerated by adding a silofluoride salt.

둘째, 규불화염의 첨가는 에트링자이트의 생성을 촉진시킬 뿐만 아니라 토양과의 포졸란 반응을 앞당겨 속경화, 고강도화가 가능하게 한다.Secondly, the addition of silofluoride not only promotes the production of ettringite, but also accelerates the pozzolanic reaction with the soil, allowing rapid curing and high strength.

셋째, 시멘트, 생석회 또는 소석회로부터 용출된 초기의 다량의 칼슘이온은 토양입자를 응집시킨다.Third, the initial large amount of calcium ions eluted from cement, quicklime or slaked agglomerate soil particles.

탄소섬유는 PAN계 탄소섬유를 사용하는데, 탄소섬유의 길이는 3∼20mm 이내의 것이 사용에 적합하다. 탄소섬유의 사용량은 토양 결합재 100중량부에 대하여 0.5∼2중량부 사용하는 것이 바람직하다.Carbon fiber uses PAN-based carbon fiber, the length of the carbon fiber is suitable for use within 3 to 20mm. The carbon fiber is preferably used in an amount of 0.5 to 2 parts by weight based on 100 parts by weight of the soil binder.

혼화제는 재료를 물과 혼합하여 성형시 작업성의 확보를 위하여 사용되는데, 리그닌계, 나프탈렌계 및 멜라닌계 등이 사용가능하다. 그 사용량은 토양 결합재 100중량부에 대하여 0.1∼2중량부 사용하는 것이 바람직하다.Admixture is used to ensure the workability during molding by mixing the material with water, lignin-based, naphthalene-based and melanin-based may be used. It is preferable to use the usage-amount 0.1-2 weight part with respect to 100 weight part of soil binders.

본 발명의 도전성 시멘트 조성물에는 탄소섬유의 균일한 분산과 경화체의 물성증진을 위하여 골재를 사용하는 것이 바람직하며, 규사를 사용하는 것도 가능하며 토상흑연, 인조흑연 및 코크스 분말 등을 사용하는 것이 가능하다. 이때 사용되는 골재의 양은 토양 결합재 100중량부에 대하여 5∼30중량부 사용하는 것이 바람직하다.In the conductive cement composition of the present invention, it is preferable to use aggregate for the uniform dispersion of carbon fibers and to improve the physical properties of the cured body. It is also possible to use silica sand, and to use earthy graphite, artificial graphite and coke powder. . At this time, the amount of aggregate used is preferably 5 to 30 parts by weight based on 100 parts by weight of the soil binder.

한편, 상기와 같은 도전성 시멘트 조성물에 충전재를 혼합하고, 그 혼합물에 수화에 의해 경화시켜 실제로 접지전극으로 사용되는 도전성 경화체가 제조된다.On the other hand, a filler is mixed with the above-mentioned conductive cement composition, and the mixture is cured by hydration to prepare a conductive cured body which is actually used as a ground electrode.

충전재로는 본 발명의 장점이라고 할 수 있는 현장토양을 사용하는 것이 가능하다. 토양은 조립토 계열이 바람직하며, 그중에서도 사질토 및 점성 사질토 계열이 특히 바람직하다. 이러한 토양은 주변에서 용이하게 채취할 수 있는 토양으로서, 본 발명의 토양 결합재는 토양에 대하여 3∼200중량% 첨가하여 사용하는 것이 바람직한데, 만약 그 첨가량이 3중량%에 미달되면 소정의 강도발현이 어렵고 200중량%를 초과하게 되면 강도는 증가하지만 경제적으로 유리하지 못하다.As a filler, it is possible to use field soil, which can be said to be an advantage of the present invention. The soil is preferably granulated soil series, and among them, sandy soil and viscous sandy soil series are particularly preferred. Such soil is a soil that can be easily collected from the surrounding, the soil binder of the present invention is preferably used by adding 3 to 200% by weight relative to the soil, if the added amount is less than 3% by weight, the predetermined strength is expressed This difficult and exceeding 200% by weight increases strength but is not economically advantageous.

또한, 현장토양 대신 실리카퓸, 메타카올린, 플라이애쉬, 슬래그 및 석분 등의 무기 미분말을 충전재로 사용하는 것이 가능하다.In addition, it is possible to use inorganic fine powder such as silica fume, metakaolin, fly ash, slag and stone powder as a filler instead of field soil.

이하 실시예를 통하여 본 발명을 구성 및 작용을 좀 더 구체적으로 설명하지만, 이에 의해 본 발명의 범주가 한정되는 것은 아니다.Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited thereto.

실시예Example

배합비Compounding cost

실시예Example 비교예Comparative example 1One 22 33 1One 22 33 CSACSA 2323 2626 1717 -- 55 -- 무수석고Anhydrous gypsum 1616 2020 1313 -- 55 -- 포틀랜드시멘트Portland cement 88 99 66 6060 5555 6565 생석회quicklime 1212 1414 88 -- -- -- 규불화염Fluoride flame 0.10.1 0.20.2 0.10.1 -- -- -- 혼화제Admixture 0.30.3 0.30.3 0.20.2 -- -- -- 탄소섬유Carbon fiber 0.60.6 0.50.5 0.70.7 0.40.4 0.20.2 0.50.5 플라이애쉬Fly ash 3434 -- -- 3636 34.834.8 -- 실리카퓸Silica fume -- 1818 -- -- -- -- 모래sand 66 -- 55 3.63.6 -- 4.54.5 흑연black smoke -- 1212 -- -- -- -- 흙soil -- -- 5050 -- -- 3030 합 계Sum 100100 100100 100100 100100 100100 100100 물water 4040 4040 4040 4040 4040 4040

(1) 경화체의 제작(1) Preparation of hardened body

본 발명에 의한 경화체의 물성 측정을 위한 경화체의 제작은 JIS R 5201 "시멘트의 물리시험방법"에 따른다. 상기 배합비에 따라 본 발명의 조성물과 물을 모르터 혼합기를 이용하여 혼합하고 가로4cm×세로4cm×길이16cm의 몰드에 잘 채워 넣는다. 이후 온도 20±1℃, 상대습도 90% 이상의 항온항습기에서 양생시킨다. 24시간 양생된 경화체는 탈형하여 물성 측정을 행한다.Preparation of the cured body for measuring the physical properties of the cured body according to the present invention is in accordance with JIS R 5201 "Physical test method of cement". According to the above compounding ratio, the composition of the present invention and water are mixed using a mortar mixer and filled into a mold having a width of 4 cm x 4 cm x 16 cm. After curing in a thermo-hygrostat at a temperature of 20 ± 1 ℃, relative humidity of more than 90%. The cured product cured for 24 hours is demolded to measure physical properties.

(2) 경화체의 물성측정(2) Measurement of physical properties of the cured product

경화체의 전기저항율 측정을 위해서는 탈형된 경화체를 대기 중에 1시간 정도 방치 후, 경화체의 양단에 은전극(silver paste)을 바른 후, 저항 측정기를 이용하여 저항을 측정한다. 측정된 저항값은 아래의 식에 의해 저항율을 산출한다.In order to measure the electrical resistivity of the cured product, after leaving the demolded cured product in the air for about 1 hour, silver electrodes are applied to both ends of the cured product, and then the resistance is measured using a resistance meter. The measured resistance value is calculated by the following equation.

강도 측정은 탈형된 경화체를 6일간 양생시킨 후, 곡강도와 압축강도를 측정하는데, JIS R 5201 "시멘트의 물리시험방법"에 따라 곡강도를 측정하고, 절단된 시편을 이용하여 압축강도를 측정한다.In the strength measurement, after curing the demolded cured product for 6 days, the bending strength and compressive strength are measured. The bending strength is measured according to JIS R 5201 "Physical test method of cement", and the compressive strength is measured using the cut specimen.

(3) 접지저항 테스트(3) Earth resistance test

본 발명에 의한 도전성 조성물의 토양과의 접착력에 따른 접지저항 저감 효과를 시험하기 위하여 접지저항 테스트를 행하였다. 테스트를 위하여 4점식 측정기를 사용하여 대지저항율을 측정하였는데, 대지저항율은 180Ω-m로 분석되었다.In order to test the effect of reducing the ground resistance according to the adhesive force with the soil of the conductive composition according to the present invention, a ground resistance test was conducted. For the test, the earth resistivity was measured using a four-point measuring instrument, and the earth resistivity was analyzed as 180Ω-m.

그리고, 각각 폭 0.4m, 깊이 1m, 길이 3m의 터파기를 행하고, BC100mm2의 전선을 바닥에 고정시킨 다음, 1m당 10kg의 재료를 물과 혼합하여 포설하고, 흙으로 되메우기를 행하였다.Then, a 0.4 m wide, 1 m deep and 3 m long trench was performed, and the electric wire of BC100 mm 2 was fixed to the floor, 10 kg of material per 1 m was mixed with water, laid, and backfilled with soil.

접지저항 측정기는 4점식 측정기인 BIDDLE사의 DET2/2를 사용하였고, 측정 방법은 전위강하법(Fall of potential Method)으로 측정을 행하였다.The ground resistance measuring instrument was a four-point measuring instrument, DET2 / 2 manufactured by BIDDLE, and the measuring method was measured by a fall of potential method.

(4) 시험 결과(4) test result

실시예Example 비교예Comparative example 1One 22 33 1One 22 33 전기저항율(Ω-m)Electric resistivity (Ω-m) 0.050.05 0.030.03 0.040.04 0.150.15 0.420.42 0.210.21 곡강도(kgf/cm2)Bending strength (kgf / cm 2 ) 4848 5252 4545 2828 99 1717 압축강도(kgf/cm2)Compressive strength (kgf / cm 2 ) 234234 250250 211211 150150 6060 9494 접지저항(Ω)Earth resistance (Ω) 6767 5454 7272 105105 173173 121121

이상의 설명에서 알 수 있듯이 본 발명에 의하면, 토양과의 접착력이 우수한 재료를 사용함으로써 전극자체의 전도성과 기계적 강도가 양호하게 유지되면서 토양과의 접촉저항을 최소화하여 낮은 저항치를 얻을 수 있는 효과가 있다.As can be seen from the above description, according to the present invention, by using a material having excellent adhesion to the soil, it is possible to obtain low resistance by minimizing contact resistance with the soil while maintaining good conductivity and mechanical strength of the electrode itself. .

이상의 설명들은 본 발명의 도전성 시멘트 조성물과 그 조성물로 제조되는 도전성 경화체를 좀 더 구체적으로 설명하기 위한 것이지, 이것이 본 발명의 범주를 한정하는 것은 아니며 다양한 실시변형이 가능하다.The above description is intended to explain in more detail the conductive cement composition of the present invention and the conductive cured body made of the composition, which does not limit the scope of the present invention and various modifications are possible.

Claims (4)

칼슘설포알루미네이트계 광물을 주성분으로 하는 클링커 분말 10∼40중량%, 포틀랜드 시멘트 1∼30중량%, 생석회 또는 소석회 10∼40중량%, 무수석고 5∼30중량%, 규불화염 0.1∼2.0중량%로 구성되는 토양 결합재 100중량%와, 토양결합재 100중량부에 대하여 혼화제 0.1∼2중량부, 탄소섬유 0.5∼2중량부를 포함하는 것을 특징으로 하는 토양과의 접착력이 우수한 도전성 시멘트 조성물.Clinker powder 10-40% by weight of calcium sulfo aluminate-based mineral, 1-30% by weight of Portland cement, 10-40% by weight of quicklime or slaked lime, 5-30% by weight of gypsum, 0.1-2.0% by weight of siliceous salt A conductive cement composition having excellent adhesion to soil, comprising 100% by weight of a soil binder comprising 0.1 to 2 parts by weight of admixture, and 0.5 to 2 parts by weight of carbon fiber. 제 1항에 있어서, 상기 토양 결합재 100중량부에 대하여 5∼30중량부의 골재를 더 포함하는 것을 특징으로 하는 토양과의 접착력이 우수한 도전성 시멘트 조성물.The conductive cement composition having excellent adhesion to soil according to claim 1, further comprising 5 to 30 parts by weight of aggregate with respect to 100 parts by weight of the soil binder. 제 1항의 도전성 시멘트 조성물과 충전재를 혼합하고, 그 혼합물을 수화에 의해 경화시켜 제조한 것을 특징으로 하는 도전성 경화체.The conductive cement composition of claim 1 is mixed with a filler, and the mixture is cured by hydration and produced. 제 3항에 있어서, 상기 충전재는 현장토양, 실리카퓸, 메타카올린, 플라이애쉬, 슬래그 및 석분으로 구성된 군으로부터 하나 또는 그 이상으로 선택되는 것을특징으로 하는 도전성 경화체.4. The conductive cured product of claim 3, wherein the filler is selected from the group consisting of field soil, silica fume, metakaolin, fly ash, slag, and stone meal.
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KR100860871B1 (en) * 2008-03-28 2008-09-29 오병춘 Composition for making the panel alternating exposure concrete techniques and the panel made by the composition
KR100930120B1 (en) * 2009-08-25 2009-12-07 노현용 Composition for earth resistance lowering agent
KR100971226B1 (en) * 2010-02-19 2010-07-20 최상릉 Cement mixture for chloride resistance in road pavement and repair

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