• 제목/요약/키워드: Alkali Activated

검색결과 256건 처리시간 0.024초

알칼리활성화 슬래그-레드머드 흙포장재의 현장 적용평가 (Field Application Assessment of Alkali-Activated Slag-Red Mud Soil Mixed Pavement)

  • 강혜주;황병일;김재환;강석표
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2017년도 춘계 학술논문 발표대회
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    • pp.107-108
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    • 2017
  • In this search, by evaluating the field applicability of soil mixed pavement of Red mud is mixed into the soil mixed pavement field applicability, and tries to present the basic data about the site application of recycling of red mud and low carbon construction material to. As a result, the conventional soil concrete organization standards (SPS-KSCICO-001: 2003) meets the criteria for parking lot, making use of red mud, natural color as well as the natural loess is expressed.

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알카리 활성화에 의한 fly ash 경화체의 강도 발현 메카니즘에 관한 연구 (Strength behaviour and hardening mechanism of alkali activated fly ash Mortars)

  • 조병완;구자갑;박승국;박종화
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2004년도 추계 학술발표회 제16권2호
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    • pp.321-324
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    • 2004
  • The discharge of fly ash that is produced by coal-fired electric power plants is rapidly increasing in Korea. The utilization of fly ash in the raw materials would contribute to the elimination of an environmental problem and to the development of new high-performance materials. So it is needed to study the binder obtained by chemically activation of pozzolanic materials by means of a substitute for the exiting cement. This paper concentrated on the strength development according to the kind of chemical activators, the curing temperature, the heat curing time. Also Scanning electron microscopy and X-Ray diffraction analysis show what the reaction products of the alkali activated fly ash are.

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레드머드 첨가에 따른 알칼리활성화 슬래그-레드머드 건식 흙포장재의 다짐 특성 (Compaction Characteristic of Alkali Activated Slag-Red Mud Dry Pavement with Red Mud)

  • 강혜주;이후석;황병일;강석표
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2017년도 추계 학술논문 발표대회
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    • pp.28-29
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    • 2017
  • For this study, alkali-activated slag red-mud pavement is manufactured to examine the usability of red-mud as a recycling material in the construction industry. In the compaction curve in terms of the replacement ratio of red mud by binder type, the dry density changed gradually depending on the water content, which implies that there is no distinct difference in compaction according to the replacement ratio of red mud. The compressive strength at 28 days was observed to be 18.9~27.0MPa in ASS, and 18.4~28.8MPa in OPC, showing a similar level between the specimens.

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알칼리 활성화 플라이애쉬를 사용한 비소성 무기결합재의 제조기술 개발 (Development of Manufacturing Technology of Non-Sintered Inorganic Using Alkali-activated Fly-ash)

  • 정석조;추용식;이종규
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2005년도 추계 학술발표회 제17권2호
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    • pp.753-756
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    • 2005
  • Recently, the alkali activation of Fly-ash has become a significant field of research because it is possible to use these materials having highly chemical reaction property. Also, the product does not generate CO2 gas, unlike ordinary Portland cement(O.P.C). Therefore, the purpose of this paper is to design for improving mechanical and chemical properties using Fly-ash and Meta-kaolin. And additive(CaO) affected to control the strength behaviors and shrinkage rate.

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알칼리 자극제 대체재로써 레드머드를 사용한 알칼리 활성 무기결합재의 특성 (Properties of Alkali Activated Inorganic Binder using Replacement Materials Alkali Activator with Red Mud)

  • 박선규
    • 한국콘텐츠학회:학술대회논문집
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    • 한국콘텐츠학회 2014년도 추계 종합학술대회 논문집
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    • pp.139-140
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    • 2014
  • 최근 건선산업에서 문제점으로 지적되고 있는 것은 제조과정 중 이산화탄소를 다량 방생시키는 시멘트의 사용이다. 이는 알칼리활성 무기결합재로 대체함으로써 시멘트보다 이산화탄소 배출량을 저감할 수 있지만 고가의 알칼리 자극제를 다량 사용하기 때문에 경제적 측면 및 사용성을 고려하지 않으면 사용할 수 없기 때문에 이에 대한 대체재에 관한 연구가 필요한 실정이다. 이에 본 연구에서는 고로슬래그를 기반으로 하는 알칼리 활성 무기결합재에 알칼리 자극제의 사용량을 저감하기 위해 레드머드를 사용하고, 레드머드에 적합한 알칼리 자극제의 종류와 사용방법에 대하여 연구하고자 하였다.

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양이온 함침 활성탄에서의 저농도 이산화탄소 상온 흡착특성 (Ambient Adsorption of Low-level Carbon Dioxide by Metal Treated Activated Carbon)

  • 이경미;조영민
    • 한국대기환경학회지
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    • 제25권4호
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    • pp.316-324
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    • 2009
  • Carbon based sorbents for $CO_2$ adsorption were prepared by impregnation with alkali metals ($Li^+$, $K^+$) and alkaline earth metals ($Ca^{2+}$, $Mg^{2+}$). BET surface area of test sorbents was lower than the intrinsic activated carbon. In particular, impregnation of $Ca^{2+}$ or $Mg^{2+}$ resulted in lower surface area of specific adsorption sites than that of $Li^+$ or $K^+$. While the adsorption capacity for $CO_2$ was high in the sorbents containing $Ca^{2+}$ and $Mg^{2+}$, strong interaction with $CO_2$ would cause to drop the capacity after regeneration. The adsorption was found high relatively in the flow with a high concentration of $CO_2$ and in a low flow rate. The adsorption isotherm for the present modified AC sorbents fits well with the Freundlich model.