• 제목/요약/키워드: 이병덕

검색결과 117건 처리시간 0.023초

콘크리트 표면 함수비에 따른 교면방수재료의 인장접착성능 (Adhesive Performance of Waterproofing System on Concrete Substrate with Moisture Condition)

  • 박성기;심재원;이병덕
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2001년도 봄 학술발표회 논문집
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    • pp.979-984
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    • 2001
  • Poor water-proofing integrity is related to many factors : site procedure, workmanship, weather. substrate conditions, installation(including asphalt application) conditions. The evaluation of adhesive properties tested by concrete surface moisture and asphalt application was based on laboratory test and observations. This report describes the pull-off test results of waterproofing systems currently used for installing and reparing for concrete bridge decks. The test results showed that the moisture condition fully affected the adhesive properties of sheet membranes and sealer but partially for liquid membranes.

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고로슬래그미분말을 활용한 수중불분리성콘크리트 (Properties of Antiwashout Underwater Concrete Using the GGBF Slag)

  • 문한영;김성수;이병덕;이재준
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1998년도 가을 학술발표회 논문집(I)
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    • pp.83-86
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    • 1998
  • Recently, underwater concrete constructions are increasing. Therefore it is considered important to control the quality of underwater concrete. In this paper, we have an intention of evaluating fundamental properties of underwater concrete using the Ground Granulated Blast Furnace Slag (GGBF Slag). Thus, it has been investigated that the slump flow of the concrete, pH value and suspended solids in solution, compressive strength on both of specimens made above and below water. Also the percentage of GGBF Slag was found to alter the filling-up in underwater concrete.

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아스팔트 콘크리트의 다짐도에 따른 피로 특성 (Fatigue Characteristics of Asphalt Concrete Based on compacted Density)

  • 김광우;이병덕;박용철
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1994년도 가을 학술발표회 논문집
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    • pp.205-210
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    • 1994
  • This study was conducted to evaluate performance of asphalt concretes under various densities, using Marshall specimens before and after freezing-and-thawing treatment. Six different compaction blows per side (20, 30, 40, 50, 60, 70 blows) were applied to specimens to produce different densities. Test results showed that the lower density specimens had the weaker resistance to freezing-and-thawing treatment. The density was an index of retaining fatigue life and displacement after freezing-and-thawing. Therefore, poor compaction in pavement was considered to be a major cause of early distress mechanisms such as rutting, ravelling and cracking, which were resulted in a reduced service life.

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염해방지를 위한 콘크리트 표면도장재료의 성능평가 (Evaluation of Surface Coating Materials of Concrete for Protection of Chloride Attack)

  • 정해문;유환구;이병덕;안태송;오병환
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2002년도 봄 학술발표회 논문집
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    • pp.749-754
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    • 2002
  • The safety and serviceability of concrete structures are influenced by corrosion of steel bars in concrete. Several methods have been available to protect the reinforcing bars from corrosion. Among them, the surface coating method is one of the easiest way to apply to concrete structures. However, the realistic guideline for surface coating materials has not been established yet in this country. In this study, in order to establish a reasonable technical guidelines which include the test method, quality criteria, and construction method, the performances of surface coating materials were evaluated.

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국내 서남해안의 콘크리트 표면염화물량 산정에 관한 연구 (Surface Chloride Content of Concrete in Domestic West and South Coast)

  • 정해문;안태송;이병덕
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2005년도 봄학술 발표회 논문집(II)
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    • pp.173-176
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    • 2005
  • Corrosion of reinforced concrete structures in marine environment is one of the most important mechanism of deterioration. For estimate of service-life for chloride attack, it is necessary to get exact surface chloride content. This paper reports the results of estimate for surface chloride content in domestic west and south coast.

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데이빗슨의 Slingshot 논변은 진리대응론을 논박하는가?

  • 이병덕
    • 논리연구
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    • 제4권
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    • pp.109-123
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    • 2000
  • 데이빗슨은 "Slingshot 논변"이라는 그의 유명한 논변을 이용하여 진리 대응론을 비판한다. 그의 논변은 타당하지만, 다음 두 전제들에 의존한다. (1) 논리적으로 동치인 문장들은 같은 사실에 대응한다. (2) 참인 문장은 그 문장 내의 한 단칭어가 공지시적 단칭어에 의해 대체될 때 대응하는 사실이 변하지 않는다. 이 논문에서 필자는 두 번째 전제가 설득력이 없음을, 특히, Slingshot 논변의 구성을 위해 필수적인 통일성 문장들에 대해서 설득력이 없음을 주장한다.

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폐콘크리트 재활용에 있어서 강도특성상의 문제점 (Problems in Strength Characteristics of Recycled Waste Concrete)

  • 김광우;연규석;이병덕
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1992년도 가을 학술발표회 논문집
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    • pp.44-49
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    • 1992
  • Selected strength characteristics of recycled concrete using crushed waste concrete were compared with those of conventional concrete using natural aggregate. Compressive strength, bonding at the interface between recycled aggregate and fresh mortar, strain and deflection under three-point bending were evaluated. Recycled concrete, in general, showed lower compressive strength, lower edlastic modulus, higher stain and higher deflection under the same loading level, compared with those of conventional concretes. However, the strength retaining ratios of recycled concretes were higher than those of conventional concretes. The compressive strength which is one of the most important load carrying capacities of concrete should be improved for successful re-use of waste concrete in structural concrete.

콘크리트 용도별 최적배합을 위한 연구(II) (Optimum Mix Design of Concrete(II))

  • 심재원;이병덕;양우석;안태송
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1999년도 학회창립 10주년 기념 1999년도 가을 학술발표회 논문집
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    • pp.175-178
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    • 1999
  • In most domestic construction fields, excessive cement content has been used because of stubborn official inspection. The purpose of this study is to reduce the cement content of mix proportioning for the decrease of hydration heat, brittleness and drying shrinkage which governs durability of concrete significantly. Parameters includes the compressive strengths, type and dosage rate of chemical and mineral admixtures and types of concrete. It is found that the chemical admixture is efficient to the reduction of cement content for high strength concrete (400kg/$\textrm{cm}^2$) and the effectiveness of mineral admixtures in the low strength concrete is somewhat higher than the high strength concrete.

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의미 전체론과 의미 불안정성 문제에 관하여

  • 이병덕
    • 논리연구
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    • 제7권2호
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    • pp.1-14
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    • 2004
  • 현재의 언어철학에서 거의 지배적인 위상을 갖고 있는 의미 전체론이 직면하는 중요한 문제 중의 하나는 '의미 불안정성 문제'이다. 의미 전체론에 의하면, 한 진술의 동일성 조건이 그 진술이 속한 이론에 상대적이기 때문에 전체 이론이 조금만 바뀌어도 그 진술의 의미가 바뀌게 되는 의미 불안정성의 문제가 발생한다. 필자는 이 논문에서 이 문제에 관한 기존의 해결 방식의 일부를 소개한 후 브랜덤이 그의 책 Making It Explicit (1994)에서 제시한 새로운 해결책을 소개하고 이를 옹호한다. 브랜덤은 이 문제를 해결하기 위해, 커뮤니케이션은 어떤 공통적인 것을 공유하는 것이라는 커뮤니케이션에 관한 기존 모델을 거부하고, "실천 속에서의 일종의 협동"으로서의 새로운 커뮤니케이션 모델을 제시한다. 필자는 이 논문에서 브랜덤이 제시하는 새로운 커뮤니케이션의 모델을 적극 옹호한다.

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