KR20070049895A - Remicon including elvan and building therewith - Google Patents
Remicon including elvan and building therewith Download PDFInfo
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- KR20070049895A KR20070049895A KR1020050107172A KR20050107172A KR20070049895A KR 20070049895 A KR20070049895 A KR 20070049895A KR 1020050107172 A KR1020050107172 A KR 1020050107172A KR 20050107172 A KR20050107172 A KR 20050107172A KR 20070049895 A KR20070049895 A KR 20070049895A
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0076—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials characterised by the grain distribution
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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
- 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
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
본 발명은 맥반석을 포함하는 레미콘 및 이를 이용한 건축물에 관한 것이다. 이를 위해, 물 170 중량부에 대해, 자갈 590 ~ 670 중량부, 모래 900 ~ 950 중량부, 시멘트 320 ~ 370 중량부, 혼화재 2 ~ 3 중량부, 및 맥반석 250 ~ 290 중량부를 포함하는 것을 특징으로 하는 맥반석을 포함하는 레미콘이 제공되며, 맥반석은 홍맥반석이 바람직하다. 아울러, 건축물은 아파트, 빌딩, 단독주택 등이 될 수 있다. The present invention relates to a ready-mixed concrete including elvan rock and a building using the same. To this end, with respect to 170 parts by weight of water, 590 to 670 parts by weight of gravel, 900 to 950 parts by weight of sand, 320 to 370 parts by weight of cement, 2-3 parts by weight of admixtures, and 250 to 290 parts by weight of elvan There is provided a ready-mixed concrete containing elvan rock, the elvan rock is preferably erythema rock. In addition, the building may be an apartment, a building, a house.
레미콘, 몰탈, 시멘트, 환경, 공해, 새집증후군, 원적외선, 맥반석 Ready-mixed concrete, mortar, cement, environment, pollution, sick house syndrome, far infrared ray, elvan
Description
본 발명은 레미콘에 관한 것으로서, 보다 상세하게는 맥반석을 포함하는 레미콘 및 이를 이용한 건축물에 관한 것이다. 최근, 새집 증후군이 커다란 사회적 문제로 대두되고 있다. 즉, 새로 건축되어 입주하는 아파트나 빌딩의 경우, 아파트로부터 벤젠, 포름알데히트, 펜타클로로벤젠, 부틸아세테이트, 톨루엔, 스틸렌 등과 같은 각종 휘발성 유기화합물(VOC)이 발산되고 있다. The present invention relates to a ready-mixed concrete, and more particularly, to a ready-mixed concrete including a ganban stone and a building using the same. Recently, sick house syndrome has become a big social problem. That is, in a newly built apartment or building, various volatile organic compounds (VOCs) such as benzene, formaldehyde, pentachlorobenzene, butyl acetate, toluene, and styrene are emitted from the apartment.
이러한 유기화합물은 기관지 계통, 아토피와 같은 피부질환, 두통, 피로감, 정서불안 등과 같이 건강상에 치명적인 영향을 주는 것을 연구되고 있다. 따라서, 이러한 문제점을 해결하기 위하여 새로 시공된 아파트나 건물을 광촉매로 코팅하거나 자연친화적 소재를 사용하는 예가 점차 증대되고 있다. These organic compounds have been studied to have a fatal effect on health, such as bronchial system, skin diseases such as atopic dermatitis, headache, fatigue, anxiety. Therefore, in order to solve this problem, an example of coating a newly constructed apartment or building with a photocatalyst or using a natural material is gradually increasing.
그리고, 2004년 5월부터는 "실내공간 공기질 법"이 입법되어 공포됨에 따라 신축된 건물은 준공전에 환경당국으로부터 의무적으로 공기질에 관한 검사를 마쳐야 하는 부담이 발생하게 되었다.In May 2004, the "Indoor Space Air Quality Act" was enacted and promulgated, resulting in the burden of mandatory air quality inspection by environmental authorities before the completion of the new building.
특히, 새로 양생된 시멘트의 경우에는 각종 화학물질이 뿜어져 나오고 이로 인해 건강을 해치는 것은 물론 각종 실내 물품(예를 들어, 전시물, 금속 등)을 부식시키기도 한다. 따라서, 이러한 환경 공해로부터 근본적으로 벗어나기 위한 기술의 개발이 요구되고 있는 실정이다.In particular, in the case of newly cured cement, various chemicals are spewed out, which not only harms health but also corrodes various indoor items (eg, exhibits, metals, etc.). Therefore, the development of technology to fundamentally escape from such environmental pollution is required.
본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로, 본 발명의 제 1 목적은, 새집증후군과 같은 환경 오염이나 공해를 근본적으로 해소할 수 있는 맥반석을 포함하는 레미콘 및 이를 이용한 건축물을 제공하는 것이다. The present invention has been made to solve the above problems, the first object of the present invention, to provide a ready-mixed concrete and a building using the same rock and rock that can fundamentally solve the environmental pollution or pollution such as sick house syndrome will be.
본 발명의 제 2 목적은, 건축물로부터 다량의 원적외선이 방사되도록 하여 인체의 건강에 도움을 줄 수 있도록 한 맥반석을 포함하는 레미콘 및 이를 이용한 건축물을 제공하는 것이다. It is a second object of the present invention to provide a ready-mixed concrete including a ganban stone and a building using the same which allow a large amount of far-infrared rays to be emitted from a building to help health of the human body.
상기와 같은 본 발명의 목적들은 물 170 중량부에 대해, 자갈 590 ~ 670 중량부, 모래 900 ~ 950 중량부, 시멘트 320 ~ 370 중량부, 혼화재 2 ~ 3 중량부, 및 맥반석 250 ~ 290 중량부를 포함하는 것을 특징으로 하는 맥반석을 포함하는 레미콘에 의해 달성될 수 있다.Objects of the present invention as described above are based on 170 parts by weight of water, 590 to 670 parts by weight of gravel, 900 to 950 parts by weight of sand, 320 to 370 parts by weight of cement, 2 to 3 parts by weight of admixtures, and 250 to 290 parts by weight of elvan. It can be achieved by a ready-mixed concrete containing elvan rock characterized in that it comprises.
그리고, 맥반석은 크기가 20 ~ 25 mm 인 것이 바람직하다.In addition, it is preferable that the elvan has a size of 20 to 25 mm.
아울러, 맥반석은 청맥반석 또는 홍맥반석인 것이 가장 바람직하다.In addition, the ganguerite is most preferably blue gangue or erythema.
상기와 같은 본 발명의 목적은, 본 발명의 또 다른 카테고리로서, 전술한 레미콘에 의해 건축되는 것을 특징으로 하는 건축물에 의해서도 달성될 수 있다.The object of the present invention as described above, as another category of the present invention, can be achieved by a building, characterized in that built by the above-mentioned ready-mixed concrete.
그리고, 건축물은 아파트, 빌딩, 단독주택중 어느 하나일 수 있다.The building may be any one of an apartment, a building, and a single house.
본 발명의 그 밖의 목적, 특정한 장점들 및 신규한 특징들은 첨부 도면들과 관련되어 설명되는 이하의 상세한 설명과 바람직한 실시예들로부터 더욱 명확해질 것이다.Other objects, specific advantages and novel features of the invention will become more apparent from the following detailed description and the preferred embodiments described in conjunction with the accompanying drawings.
이하에서는 본 발명에 따른 맥반석을 포함하는 레미콘 및 이를 이용한 건축물에 대해 설명하도록 한다. Hereinafter will be described with respect to the ready-mixed concrete including the elvan according to the invention and the building using the same.
레미콘은 시멘트 몰탈의 상태이며, 물, 시멘트, 자갈, 모래, 혼화재 등을 포함하고 있다.Ready-mixed concrete is a state of cement mortar and contains water, cement, gravel, sand, admixture, and the like.
시멘트는 KS L 5201, KS L 5210, KS L5211, KS L 5401 과 같은 규격의 것이 사용될 수 있다.Cement may be used, such as KS L 5201, KS L 5210, KS L5211, KS L 5401.
자갈(굵은 골재)는 깨끗하고 단단하며 내구적인 것으로 적당한 입도를 가지며, 점토덩어리, 유기물, 가늘고 긴 돌조작 등의 해로운 양을 포함해서는 안되며, KS F 2526, KS F 2527, KS F 2534,KS F 2544, KS F 2558, KS F 2559에 따른다. Gravel (coarse aggregate) is clean, hard and durable and has a suitable particle size and should not contain harmful amounts such as clay lumps, organic matter, and thin long stone operations. KS F 2526, KS F 2527, KS F 2534, KS F According to 2544, KS F 2558, KS F 2559.
천연골재(잔골재, 예를 들어 모래)는 염분의 한도가 KS F 2515에 따라 시험하였을 때, 0.04%이하이어야 한다. 0.04%를 초과한 것에 대해서는 주문자의 승인을 얻어야 하나, 그 한도는 0.1%를 초과할수 없다. 또한, 다른 종류의 골재를 혼합해서 사용하는 경우도 있다.Natural aggregates (fine aggregates, eg sand) should have a salt limit of not more than 0.04% when tested according to KS F 2515. Exceeding 0.04% shall be subject to the orderer's approval, but the limit shall not exceed 0.1%. In addition, different types of aggregates may be used in combination.
혼화재는 시멘트, 물, 골재 이외의 재료로서 몰탈, 콘크리트에 특별한 품질을 부여하거나 성질을 개선하기 위하여 첨가되는 재료이다. 그리고, 이러한 혼화재로는 계면(표면)활성제, 기포작용(AE제), 분산작용(감수제), 호화재 등이 단독 또는 혼합되어 사용된다.Admixtures are materials other than cement, water, and aggregates that are added to give special quality or improve properties to mortar and concrete. As such admixtures, an interface (surface) active agent, a foaming agent (AE agent), a dispersing agent (water reducing agent), a luxury material, or the like is used alone or in combination.
계면활성제는 기름에 녹기 쉽고 물에 녹기 어려운 소수기(친유기)와 물에 잘 녹고 기름에 녹기 어려운 친수기로 구분되어 있고 이 양쪽의 종류나 함유량에 따라 계면활성제로서의 기포·분산·습윤 작용이 정해진다.Surfactants are classified into hydrophobic groups (lipophilic groups) that are soluble in oil and difficult to dissolve in water, and hydrophilic groups that are soluble in water and hard to dissolve in oil.
그리고, 기포작용(AE제)은 계면 활성제를 포함한 용액에 기계적 수단을 가하여 공기를 혼입시키면 용액에 둘러싸인 기포가 생긴다. 이때 기포의 내부 쪽으로는 소수기가, 용액 쪽에 친수기를 향하게 배열된 흡착모가 순간적으로 생성되어 기포가 된다. 발생한 기포 가운데 큰 기포는 소멸하고 작은 기포는 독립된 미세한 기포가 된다. 콘크리트에는 기포성이 뛰어나고 생성된 기포가 안정된 것이 이용된다.In the bubble action (AE agent), bubbles are surrounded by a solution by adding mechanical means to a solution containing a surfactant and incorporating air. At this time, the adsorbed hair arranged with the hydrophobic group toward the inside of the bubble toward the hydrophilic group on the solution side is instantaneously generated to form the bubble. Among the bubbles generated, large bubbles disappear and small bubbles become independent fine bubbles. The concrete which is excellent in foamability and which the foam | bubble produced was stable is used.
또한, 분산작용(감수제)은 미세한 분체를 수중에 넣으면 분체 입자간의 응집력이 분체 표면을 적시는 힘보다도 크기 때문에 입자는 응집되고 골고루 분산되지 않는다. 이 수용액에 예를 들어 리그닌설폰산을 첨가하면 수중에서 설폰산 음이온과, 칼슘 양이온으로 전리하여 강한 음이온활성을 나타내고 응집상태의 입자간의 물과 공기를 해방시키기 때문에 시멘트에 유동성이 생기게 된다.In addition, in the dispersing action (resining agent), when the fine powder is put in water, the cohesive force between the powder particles is larger than the force that wets the surface of the powder, so that the particles aggregate and do not evenly disperse. When lignin sulfonic acid is added to this aqueous solution, for example, it is ionized by sulfonic acid anion and calcium cation in water, exhibits strong anionic activity, and releases water and air between agglomerated particles, thereby creating fluidity in cement.
호화재란 포졸란과 같이 그 사용량이 비교적 많아서 그 자체의 부피가 콘크리트 배합계산에 관계되는 것을 말하고 혼화제란 AE제나 감수제 등과 같이 그 상용량이 비용적 적어서 그 자체의 부피가 콘크리트 배합설계에 무시되는 것을 말한다.Luxury material means that its volume is relatively high, such as pozzolanic, and its volume is related to the concrete compounding calculation. Admixture means that its volume is negligible in the concrete compounding design because its commercial volume is low, such as AE or water reducing agent. .
이러한 혼화재의 구체적인 성분을 살펴보면 다음과 같다.Looking at the specific components of these admixtures are as follows.
즉, (1) 포졸란 작용이 있는 것 - 플라이애시, 규조토, 화산회, 규산백토That is, (1) having a pozzolanic action-fly ash, diatomaceous earth, volcanic ash, white silicate
(2)주로 잠재수경성이 있는 것 - 고로슬래그 미분말(2) Mainly latent hydraulics-blast furnace slag fine powder
(3)경화과정에서 팽창을 일으키는 것 - 팽창제(3) causing expansion during curing-expanding agents
(4)오토클래브 양생에 의하여 고강도를 나타내게 하는것 - 규산진 미분말(4) to exhibit high strength by autoclave curing-fine silicate powder
(5)착색시키는 것 - 착색재(5) Coloring-coloring materials
(6)기타 - 고강도용 혼화재, 포리마 , 증량재 등이다.(6) Others-High strength admixtures, forima and extenders.
그 밖에, 워커빌리티와 내동해성을 개선시키기 위한 AE제 , AE감수제, 워커빌리티를 향상시켜 단위수량이나 단위시멘트량을 감소시키는 감수제. AE감수제, 유동성을 크게 개선시키는 유동화제, 근 감수효과로 강도를 크게 높이는 고강도용 감수제 (또는 고성능 감수제라고도 함), 응결, 경화시간을 조절하는 촉진제, 지연제, 급결제, 초지연제, 방수효과를 나타내는 방수제, 기포의 작용에 의해 충전성을 개선하거나 중량을 조절하는 기포제, 발포제, 염화물에 의한 철근의 부식을 억제시키는 철근의 방청제 등이 있다.In addition, an AE agent, an AE water reducing agent, and a water reducing agent that improves workability and reduces unit quantity and unit cement amount to improve workability and resistance to freezing. AE water reducing agent, fluidizing agent which greatly improves fluidity, high strength water reducing agent (also called high performance water reducing agent) which greatly increases strength by muscle water reduction effect, accelerator for controlling condensation and curing time, retardant, quickener, super delay agent, waterproof effect There is a waterproofing agent, a foaming agent to improve the fillability or control the weight by the action of the bubble, a foaming agent, a corrosion inhibitor of the steel bar to suppress the corrosion of the reinforcement by chloride.
이러한 성분을 포함하여 혼합되는 본 발명의 레미콘은 물 170 중량부에 대해, 자갈 590 ~ 670 중량부, 모래 900 ~ 950 중량부, 시멘트 320 ~ 370 중량부, 혼화재 2 ~ 3 중량부, 및 맥반석 250 ~ 290 중량부를 포함한다.The ready-mixed concrete of the present invention mixed with such components includes 590 to 670 parts by weight of gravel, 900 to 950 parts by weight of sand, 320 to 370 parts by weight of cement, 2 to 3 parts by weight of admixture, and elvan 250 with respect to 170 parts by weight of water. ~ 290 parts by weight.
자갈이나 모래가 너무 적은 경우 시멘트가 많이 소요되어 단가가 상승하며, 너무 많은 경우에는 강도 저하의 문제가 발생한다. If the gravel or sand is too small, it takes a lot of cement and the unit price increases, and if too much, the problem of strength deterioration occurs.
시멘트도 기준 미만으로 혼합할 경우 강도 저하의 문제가 발생하고, 기준 이상인 경우 혼화재의 추가 투입과 동반하여 단가가 지나치게 상승하는 문제점이 있다. 특히, 혼화재의 경우는 통상의 것을 사용하되 시멘트의 투입량에 비례하여 사용한다.When the cement is also mixed below the standard, the problem of strength decreases, and when it is above the standard, there is a problem in that the unit price increases excessively with the addition of the admixture. In particular, in the case of admixture, use a conventional one in proportion to the amount of cement input.
맥반석은 맥반석 250 ~ 290 중량부가 되도록 하며, 특히 자갈 : 맥반석의 중 량비율이 7 : 3 이 되도록 한다. 맥반석이 지나치게 많이 포함되면 맥반석으로 인해 효과는 상승하나 콘크리트의 강도저하와 균열이 발생한다는 단점이 있다. 또한, 맥반석이 작게 포함되면, 맥반석으로 인해 효과가 미비해지는 한계가 있다. 그리고, 맥반석은 홍맥반석(장석과 고령토를 포함)을 사용하는 것이 가장 바람직하다. 이는 홍맥반석의 경우 매장량이 많아 구하기가 쉽고 저렴하기 때문이다. Elvan rock should be 250 to 290 parts by weight, especially gravel: elvan weight ratio of 7: 3. If too much of the elvan is included, the effect is increased due to the elvan, but there is a disadvantage that the strength decreases and cracks occur in the concrete. In addition, if the elvan is included small, there is a limit that the effect is inadequate due to the elvan. In addition, it is most preferable to use erythema rock (including feldspar and kaolin). This is because erythema is easy to obtain and cheap because of the large reserves.
이하에서는 구체적인 실험예에 대해 설명하기로 한다. 우선 본 발명의 실험샘플을 다음과 같은 성분비로 조성하였다.Hereinafter, specific experimental examples will be described. First, the experimental sample of the present invention was prepared in the following component ratios.
즉, 물 170kg, 자갈 600kg, 모래 912 kg, 시멘트 349kg, 혼화재 2.44kg, 지름 20 ~ 25 mm의 홍맥반석 180 kg을 혼합하여 40 × 40 × 10 (mm)의 레미콘 시료블럭을 만들었다. 그리고 한구건자재시험연구원에 시험을 의뢰하여 "KICM-FIR-1085"의 시험방법에 의해 암모니아의 농도를 FT-IR로 측정하였다. 측정된 시험결과는 [표 1]과 같다.That is, a mixed concrete sample block of 40 × 40 × 10 (mm) was made by mixing 170 kg of water, 600 kg of gravel, 912 kg of sand, 349 kg of cement, 2.44 kg of admixture, and 180 kg of erythema with a diameter of 20 to 25 mm. In addition, the test was requested to the Hankuk Construction Materials Testing Institute and the concentration of ammonia was measured by FT-IR by the test method of "KICM-FIR-1085". The measured test results are shown in [Table 1].
상기와 같은 [표 1]의 실험으로부터 알 수 있는 바와 같이, 2시간이 경과후 75.6% 라는 높은 탈취율을 나타낸다. 따라서, 본 발명의 레미콘으로 건축물을 시공할 경우 시간이 지남에 따라 높은 탈취율에 의해 각종 유해 화학물질이 탈취될 수 있음을 알 수 있다.As can be seen from the experiment of Table 1 above, a high deodorization rate of 75.6% is shown after 2 hours. Therefore, it can be seen that when constructing a building with the ready-mixed concrete of the present invention, various harmful chemicals may be deodorized by a high deodorization rate over time.
또한, 상기와 같은 본 발명에 따른 레미콘 시료를 이용하여 원적외선 방사실험을 한국건자재시험연구원에 의뢰하였다. 본 실험은 40 ℃에서 FT-IR 스펙트로메타를 이용하였으며, 흑체 대비 측정 결과는 [표 2]와 같다. In addition, using the ready-mixed concrete samples according to the present invention, the far-infrared radiation test was commissioned by the Korea Institute of Construction Materials. In this experiment, the FT-IR spectrometer was used at 40 ° C., and the result of the blackbody measurement is shown in [Table 2].
[표 2]로부터 알 수 있는 바와 같이 본 발명에 따른 레미콘 시료로부터 0.911 %라는 매우 높은 원적외선이 방출되고 있음을 알 수 있다. 참고로 학계에 발표된 세계 최고의 원적외선 방출율은 0.95 %이다. As can be seen from Table 2, it can be seen that a very high far infrared ray of 0.911% is emitted from the ready-mixed concrete sample according to the present invention. For reference, the world's highest far-infrared emission rate is 0.95%.
본 발명에 따른 맥반석을 포함하는 레미콘 및 이를 이용한 건축물에 의할 경우, 새집증후군과 같은 환경 오염이나 공해를 근본적으로 해소할 수 있다. 따라서, 준공후 광촉매 코팅과 같은 추가 작업이 필요없게 된다.In the case of the ready-mixed concrete including elvan according to the present invention and a building using the same, it is possible to fundamentally solve environmental pollution or pollution such as a sick house syndrome. Therefore, no additional work such as photocatalytic coating is necessary after completion.
그리고, 건축물로부터 다량의 원적외선이 방사되기 때문에 그 속에서 거주하는 인체의 건강에 많은 도움을 줄 수 있다. In addition, since a large amount of far infrared rays are emitted from the building, it can be very helpful for the health of the human body living therein.
비록 본 발명이 상기 언급된 바람직한 실시예와 관련하여 설명되어졌지만, 발명의 요지와 범위로부터 벗어남이 없이 다양한 수정이나 변형을 하는 것이 가능하다. 따라서 첨부된 특허청구의 범위는 본 발명의 요지에서 속하는 이러한 수정이나 변형을 포함할 것이다. Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims will cover such modifications and variations as fall within the spirit of the invention.
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| KR102199126B1 (en) | 2020-07-27 | 2021-01-06 | 에스트래픽 (주) | RFID Reader, and Method for controlling Time Division Multiplexing for avoding Communicational Conflict between RFID Readers |
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| KR102199126B1 (en) | 2020-07-27 | 2021-01-06 | 에스트래픽 (주) | RFID Reader, and Method for controlling Time Division Multiplexing for avoding Communicational Conflict between RFID Readers |
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