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      플라이애쉬의 품질 변화가 콘크리트의 성질에 미치는 영향 = The Effect of Quality of Fly Ash on Properties of Concrete

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      https://www.riss.kr/link?id=A75002604

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      다국어 초록 (Multilingual Abstract)

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      In this study, effects of carbon content and fineness of fly ash on the workability and the strength development of concrete are investigated experimentally. Carbon content with 6 1eve1s(0, 2, 3 4 5 7%) and fineness with 3 1eve1s(4000, 5000. 6000 cm2/g) are selected for test variables. Besides, the effect of fly ash with variation of initial concrete temperature is tested.
      The fly ash used in this study is produced from combustion of bituminous coals at Boryong thermal power plant in Korea, and conforms to the quality requirements for KS L 5405. To measure slump and air losses, a small laboratory agitator was used. Slump and air content were measured at 0, 20, 40, and 60 minutes after completion of mixing. All specimens for compressive strength were casted in 100 x 200 mm cylinder moulds and cured in a water chamber at 20±3℃ during the required periods.
      As the results, the used AE admixture content to maintain constant initial air content is increased linearly with increasing carbon content in the fly ash. With increasing fineness of fly ash, the strengths at 3 and 7days are slightly increased, however, there is no clear difference between28 day strengths within the scope of this study.


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      In this study, effects of carbon content and fineness of fly ash on the workability and the strength development of concrete are investigated experimentally. Carbon content with 6 1eve1s(0, 2, 3 4 5 7%) and fineness with 3 1eve1s(4000, 5000. 6000 cm2/...

      In this study, effects of carbon content and fineness of fly ash on the workability and the strength development of concrete are investigated experimentally. Carbon content with 6 1eve1s(0, 2, 3 4 5 7%) and fineness with 3 1eve1s(4000, 5000. 6000 cm2/g) are selected for test variables. Besides, the effect of fly ash with variation of initial concrete temperature is tested.
      The fly ash used in this study is produced from combustion of bituminous coals at Boryong thermal power plant in Korea, and conforms to the quality requirements for KS L 5405. To measure slump and air losses, a small laboratory agitator was used. Slump and air content were measured at 0, 20, 40, and 60 minutes after completion of mixing. All specimens for compressive strength were casted in 100 x 200 mm cylinder moulds and cured in a water chamber at 20±3℃ during the required periods.
      As the results, the used AE admixture content to maintain constant initial air content is increased linearly with increasing carbon content in the fly ash. With increasing fineness of fly ash, the strengths at 3 and 7days are slightly increased, however, there is no clear difference between28 day strengths within the scope of this study.


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      목차 (Table of Contents)

      • 목차
      • Ⅰ. 서론 = 241
      • Ⅱ. 실험 = 242
      • 1. 실험계획 = 242
      • 2. 사용재료 = 244
      • 목차
      • Ⅰ. 서론 = 241
      • Ⅱ. 실험 = 242
      • 1. 실험계획 = 242
      • 2. 사용재료 = 244
      • 3. 실험방법 = 246
      • Ⅲ. 실험결과 및 분석 = 246
      • 1. 플라이애쉬내 미연탄소의 영향 = 246
      • 2. 플라이애쉬 분말도의 영향 = 247
      • 3. 콘크리트 초기온도에 따른 플라이애쉬의 효과 = 251
      • Ⅳ. 결론 = 252
      • * 참고문헌 = 253
      • * Abstract = 254
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