고유동 고강도 콘크리트용 거푸집의 측압 특성에 관한 실험적 연구
Experimental Study on Lateral Pressure Characteristics of a Formwork for High-Flowable and High-Strength Concrete
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초록
본 연구에서는 고유동 고강도 콘크리트의 현장타설에의 적용성 검토를 위해 거푸집의 측압검토를 수행하였다. 이를 위해 타설높이 및타설속도를 주요변수로 정하여 실험체를 제작한 후, 수행한 실험으로부터 측압 및 온도변화를 측정하였다. 고유동 고강도 콘크리트의 최대측압은 굳지 않은 콘크리트의 측압으로 나타났으며, 타설 직후 측압이 감소하기 시작하여 12시간 이후 안정화를 보였다. 3~4시간 이후 안정화가 나타나는 보통 콘크리트와 측압이 감소하는 경향은 유사하다. 타설속도가 빠를수록 최대 측압이 크게 발생하였으며, 시간의 경과에따른 감소량은 거의 유사하였다. 또한 수화열과 측압감소 사이에 직접적인 연관성은 나타나지 않았다.
Abstract
In this study, to examine the application of cast-in-place of high-flowable and high-strength concrete, an experimental study on the lateral pressure of a formwork was preformed. The experiment specimens, which have different casting height and casting speed were prepared. The lateral pressure and the change of temperature from test specimens were obtained. The maximum lateral pressure was shown to lateral pressure of fresh concrete. Immediately after placing, the lateral pressure starts to decrease and, after 12 hours, it showed a stabilization. The decreased tend of the lateral pressure was similar with normal-strength concrete, which appears stabilization after 3~4 hours from casting completion. The more casting speed is fast, the more maximum lateral pressure is high, but pressure reduction with the lapse of time was nearly similar. In addition, it was found that there was no direct relation between the hydration heat and the lateral pressure reduction.
참고문헌 (10)
- American Concrete Institute, "ACI 347-04Guide to Formwork for Concrete", American Concrete Institute, ~ (2008)
- 한천구, "Mock-Up 시험에 의한 고성능 콘크리트의 수축특성 분석", 한국구조물진단유지관리공학회 논문집, 10(5), pp.106~114 (2006), 한국구조물진단유지관리공학회
- Kang, C. S., "An Experimental Study on the Development of Unit Column Wall Form System Using (Focusing on the Lateral Pressure)", Proceedings of KCI, pp.507~510 (2005)
- Kim, J. W., "An Experimental Study on Estimation for Framework Pressures with High Flowable Concrete", Proceedings of KSAE, pp.295~300 (1996)
- Kim, S. H., "Estimation of Lateral Pressure in Fresh Concrete", Proceedings of KSCE, pp.659~652 (2006)
- Korea Concrete Institute, "Manufacture and Construction of High Flowable Concrete", Korea Concrete Institute, ~ (2010)
- Kwon, S. H., "Development of a Prediction Model for Formwork Pressure Exerted by Self-Compacting Concrete", Proceedings of KCI, pp.453~456 (2008)
- Ministry of Land, Infrastructure and Transport, "Concrete Standard Specifications, Ministry of Land", Ministry of Land, Infrastructure and Transport, ~ (2009)
- Park, J. H., "Safety Evaluation for The Lateral Pressure of Formwork using A High-Slump Concrete", Proceedings of KCI, pp.249~250 (2013)
- Tilo, P., "Self-Compacting Concrete - pressure on formwork and ability to deaerate", Darmstadt Concrete, 17, pp.1~15 (2002)