• 제목/요약/키워드: 공민학

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Properties of Surface Grossing on the Design-Concreat by Developing of Design-Forms for Building Wall (건축물 벽체용 문양거푸집 개발을 통한 의장콘크리트의 표면광택 특성)

  • Oh, Jung-Keun;Gong, Min-Ho;Cho, Sang-Young;Jung, Keun-Ho;Jung, Sang-Jin;Jung, Jae-Young
    • Journal of the Korea Institute of Building Construction
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    • v.3 no.1
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    • pp.131-138
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    • 2003
  • Contemporary architecture calls for a wide range of surface textures and treatments. A surface compatible with the architect's design may vary from a glass-smooth finish to one requiring special sculptured ornamentation. These surfaces require many different types of form sheathing and lining. The purpose of study is development of new design form and made elaborateness shape. Architecture finish material not used expenses working hours, personnel expenses, architecture finish material cost. After this, building wall apply a variety shape in concrete surface and Easy to used in field.

An Experimental Study for Basic Property of Ultra High-strength Concrete in a 100MPa class of Specified Concrete Strength (설계기준강도 100MPa급 초고강도 콘크리트의 기초물성에 관한 실험적 연구)

  • Gong Min-Ho;Yang Dong-Il;Jung Sang-Jin
    • Journal of the Korea Institute of Building Construction
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    • v.6 no.3 s.21
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    • pp.123-129
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    • 2006
  • In these days, as building structures are getting taller, larger, and more diversified, structural systems with more economy and more efficiency are being required and so are more efficient building materials, this study conducted a basic experiment to conclude an adequate selection of materials and to calculate an optimal mixing proportion of those materials to produce High-strength concrete in a 100MPa of specified concrete strength. And also we conducted an experiment to find out basic properties of this concrete such as slump-flow, strength.

Optimal Sizing of Intercepting Flow for Reducing Pollution Loads Caused by CSOs (CSOs 저감을 위한 차집관거 최적화 시스템)

  • Kong, Min-Keun;Bae, Ki-Hyun;Kang, Woo-Young
    • Journal of Korean Society of Water and Wastewater
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    • v.18 no.4
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    • pp.418-424
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    • 2004
  • An abrupt high pollution loads in combined sewer systems is believed to be caused by first flushing actions and the resuspension of sediments deposited in sewers. Therefore, pollution loads in each flow regulator have a different tendency. This systems control intercepting flow in each flow regulator using water quality and water level. A desired quantity of intercepting flow was adjusted and the necessary slide position for a constant intercepting is calculated by Optimization programming. This systems make it possible to reduce pollution loads caused by CSOs to water body, may be alternative for the stable operation of STP through improving water quality to STP.

A study on Sintering Characteristics of Commercial 7xxx Series Al Alloy Powders (상용 7xxx Series Al 합금계 혼합분말의 소결 특성)

  • ;;;Panyu
    • Journal of Powder Materials
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    • v.11 no.1
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    • pp.69-73
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    • 2004
  • The sintering characteristics of commercial 7xxx series Al-Zn-Mg-Cu alloy have been investigated. Sintering system of this blended elemental powder has aspects of both transient and supersolidus liquid phase sintering. Transient liquids occur when the constitution point during sintering lies in a solid phase region but where the sintering temperature is greater than either the melting point of one of the constituent or a eutectic temperature. Supersolidus liquid phase sintering occurs when a preblended powder is heated to a temperature between the solidus and liquids. However, these reaction were restrained their inter diffusion due to the appearance of the oxide film. Thus, 7xxx series Al alloy is extremely sensitive to process variables, including particle size, holding time and sintering temperature. Therefore, above phenomenons were observed formation and behaviour of the liquid by using SEM and DSC.