• 제목/요약/키워드: high flowing

검색결과 670건 처리시간 0.024초

고로슬래그 미분말을 사용한 고유동콘크리트의 내동해성에 관한 실험적 연구 (An Experimental Study on the Frost Resistance of High-Flowing Concrete Using Granulated Blast-Furnace Slag)

  • 김무한;권영진;강석표
    • 콘크리트학회논문집
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    • 제12권2호
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    • pp.43-51
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    • 2000
  • This study is to investigate for the frost resistance of high-flowing concrete using finely ground granulated blast-furnace slag with experimental parameters, such as type of binder, type of superplasticizer and method of curing. The resistance to freezing and thawing of high-flowing concrete by type of binder and superplasticizer is presented differently. Though the frost resistance of high-flowing concrete is satisfactory under standard condition, it is required that high-flowing concrete has entrained air like plain concrete. Because the critical spacing factor, being capacity of frost resistance, of high-flowing concrete is longer that of plain concrete, the frost resistance of high-flowing concrete, using finely ground granulated furnace blast slag, is superior to that of plain concrete.

플라이애쉬 대체율별 강모래.깬자갈을 사용한 고유동콘크리트의 각종 유동특성 및 공학적 특성에 관한 실험적 연구 (The Experimental Study on the High Flowing and Engineering Properties of High Flowing Concrete using River and Crushed Stone according to the Replacement Percentage of Fly-ash)

  • 최희용;조성현;최세진;김규용;김무한
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1996년도 가을 학술발표회 논문집
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    • pp.308-315
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    • 1996
  • The utilization of high flowing concrete in construction sites is a world wide trend, and it will be increase to need for high flowing concrete in our construction sites. While it is quite easy to make high-flowing concrete in the laboratory, controlling slump in the field long enough to ensure easy placement once the concrete arrives at job site can be difficult. This study is the experimental study on the high-flowing and engineering properties of high flowing concrete using river sand and crushed stone according to the replacement percentage of fly-ash. As a results of this study is the mix proportion of replacement percentage of fly-ash 30% better than the others. And it is confirm to possibility of manufacture of the high flowing concrete.

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고유동콘크리트의 유동특성 및 공학적특성에 미치는 조합요인에 관한 실험적 연구 (An Experimental Study on the Mix Proportion in Fluidity and Engineering Properties of High Flowing Concrete)

  • 신홍철;우영제;강석표;김규용;정하선;이석홍;손영현;김무한
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1998년도 가을 학술발표논문집(II)
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    • pp.307-312
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    • 1998
  • Recently the study on high flowing concrete which has high workability and Self-compacting is being proceeded actively in the university and corporative laboratory. There are some cases that has been applied to the field. This high flowing concrete has higher fluidity and segregation resistance than Plain of flowing concrete. And it is being focused as a remarkable know-how which can make high-quality concrete and reduction effect of labor force. This properties of high flowing concrete are influenced by the relationship of several factors; binder content, water binder ratio and unit water content. It is the aim of this study to propose reference data at mix design of high flowing concrete, after comparing and analyzing the fluidity and strength properties of high flowing concrete according to water binder content ratio and unit water content.

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고유동콘크리트의 유동특성 및 공학적 특성에 미치는 시멘트페이스트용적 및 골재용적과의 관계에 관한 실험적 연구 (The Experimental Study on the Influence of Relation between Cement Paste and Aggregate Volume to Effect the High Folwing and Engineering Properties of High Flowing Concrete)

  • 김규용;최희용;강희관;김무한
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1996년도 가을 학술발표회 논문집
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    • pp.301-307
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    • 1996
  • High flowing concrete has been made using a combination of much amount cementitious materials and addition of SP agents, so that it makes possible to high flowing properties of fresh concrete. In the fluid mechanical and rheological point of view, high flowing concrete is affected on the relation between cement paste and aggregate of volume. In this experimental study, it is measured high flowing concrete of slump-flow about 65$\pm$5cm according to 0.54~0.80 of volume ratio and to analysed the properties of high flowing concrete in fresh and hardened concrete. It is the aim of this study to consider the affection of high flowing properties accoring to cement paste to aggregate ratio of volume on the combination of concrete.

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고유동콘크리트의 유동특성에 미치는 시멘트 및 고성능 AE감수제의 효과에 관한 연구 (An Experimental Study on the Effect of Cement and High range water reducing AE agent in Fluidity of High Flowing Concrete)

  • 김규용;반성수;박선규;박유신;신홍철;김무한
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1998년도 봄 학술발표회 논문집(I)
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    • pp.63-68
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    • 1998
  • The fluidity of high flowing concrete can be affected by numerous parameters which characterize either the cement of the admixture. The reactivity of a cement as determined by its chemical composition(especially its $C_3$A content), its fineness and its content in sulfates and alkalies obviously plays a key role in rheology of high flowing concrete in fresh state. Specific properties of high range water reducing AE agent used to enhance the workability of high flowing concrete also exert important influence. The purpose of this experimental study is to investigate and analyze the effect of cement and high range water reducing AE agent in fluidity, setting, compressive strength of high flowing concrete. As a result, we found that fluidity of high flowing concrete is affected greatly by kind of cement and high range water reducing AE agent, also, there is harmonic character between high belite cement and polycarbonic acid high range water reducing AE agent.

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플라이애쉬의 미연탄소 함유량에 따른 고유동콘크리트의 품질에 관한 실험적 연구 (An Experimental Study on the Quality of High Flowing Concrete according to Ignition Loss of Fly-ash)

  • 신흥철;강희관;최세진;김규용;김진만;김무한
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1997년도 가을 학술발표회 논문집
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    • pp.381-384
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    • 1997
  • It is necessary for manufacturing the high flowing to use the fly-ash as binder of concrete, therefore, Quality of fly-ash is very important to the fluidity of high flowing concrete. In this study, it is comparing and investigating the fludity of high flowing concrete used some fly-ash which it's Ignition loss is 2.44, 4.90, 7.10%. As a result of this experimental study, Ignition loss of fly-ash effects the properties of high flowing concrete, such as air content, flowability, passability etc. but even if valve of ignition loss is upper the specification, properties of high flowing concrete such as setting and hardening time, compressive strength etc.

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강섬유 혼입에 따른 고유동 자기충전 콘크리트의 유동특성 (Flowing Characteristic of High Flowing Self-Compacting Concrete with mixing Steel Fiber)

  • 최연왕;최욱;김기범;정재권;안태호;엄주한
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2008년도 춘계 학술발표회 제20권1호
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    • pp.461-464
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    • 2008
  • 본 연구에서는 직경 및 길이를 변화시킨 강섬유를 혼입한 고유동 자기충전 콘크리트의 유동특성을 알아보기 위하여 충전성 및 간극통과성 실험을 실시하였다. 유동성 평가를 실시한 결과 강섬유의 직경 및 길이가 증가할수록 유동성능은 감소하지만 JSCE 2등급 병용계 고유동 콘크리트의 기준에 만족하였으며, ASTM C 1621에서 제시한 통과 성능을 만족하였다. 본 연구를 통하여 강섬유를 혼입한 고유동 자기충전 콘크리트의 현장 적용이 가능할 것으로 판단된다.

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고유동콘크리트의 각종 유동특성에 미치는 세골재의 영향에 관한 실험적 연구 (An Experimental Study on the Fluidity of High Flowing Concrete Affected by Fine Aggregate Types)

  • 김규용;신홍철;최세진;강희관;조성현;김무한
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1997년도 봄 학술발표회 논문집
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    • pp.220-226
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    • 1997
  • High flowing concrete has flowability, passability, segregation resistance and so on, and there are so many influence factor to affect to fluidity of high flowing concrete, therefore it is so difficult to evaluate exactly the properties in fresh state. This study is to analyze and evaluate thefluidity of high flowing concrete affected by fine aggregate with test method such as, slump-flow test, V-lot test, L-flow test, Box filling test.

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고로슬래그 미분말을 사용한 고유동고$\cdot$강도 콘크리트의 혼화제에 따른 유동 및 응결 특성 (Flowing and Setting Properties of High Flowing$\cdot$High Strength Concrete using Blast-Furnace Slag according to the Chemical Agent)

  • 김용로;심재형;강석표;김상윤;백철;김무한
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2000년도 가을 학술발표회 논문집(II)
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    • pp.1242-1247
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    • 2000
  • Results from a study on the effect of the chemical agent on the flowing and setting properties of high flowing.high strength concrete using blast-furnace slag are presented in this paper. The flowing and setting properties of concrete are investigated by slump, slump-flow, flowing velocity, L-flow, velocity of V-funnel, L-spatial passability and setting time. In addition, kinds of chemical agent were composed of naphthalene type, of naphthalene and melamine and melamine type. The results indicate that dispersive capacity can be increased by naphthalene composition. Also, it shows that viscosity and early strength can be increased by melamine composition.

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고유동콘크리트의 유동특성에 미치는 잔골재 및 굵은골재의 영향 (Influence of the Fine and Coarse Aggregate on the Fluidity of High Flowing Concrete)

  • 김규용;이정율;박선규;정하선;이석홍;손영현;김무한
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1998년도 가을 학술발표논문집(II)
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    • pp.301-306
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    • 1998
  • Aggregate as the component of High Flowing Concrete has much influence on the properties of High Flowing Concrete according to the quality and condition because the aggregate occupy a lot of concrete volume. The shape and size of aggregate affect a lot spatial passibility and fillingability. The segregation is easy to occur when the rate of Fine aggregate is high so that Fluidity is much affected by aggregate factor. In this study, therefore, we try to understand the various fluidity according to the fine aggregate of standard grade rang, the size of Coarse aggregate and the rate of fine aggregate to confirm the manufacturing possibility of High Flowing Concrete by examination on the influence of fresh state of high flowing concrete such as flowability, reinforcement passibility, fillingability, segregation resistance.

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