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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.13 No.2
- 발행연도
- 2019.2
- 수록면
- 167 - 181 (15page)
이용수
초록· 키워드
오류제보하기
Workability of concrete varies during pumping. Even though concrete satisfies the required workability before pumping, it often does not satisfy the required standard after pumping. Moreover, serious problem could happen such as segregation and blockage. In this study, the rheological properties of concrete change during pumping from the pressure distribution over the pipe length was investigated. The rheological properties and the pressures measured from seven different real-scale pumping tests with 116 m to 1000 m long pipelines and 24 MPa to 100 MPa concrete were analyzed. As a result, it was found that the rheological properties vary gradually along the pipeline, and could abruptly change inside the pump. The variation of rheological properties during pumping seems to be attributed in part to the increase of water absorption in aggregates under high pressure and the additional mixing effect, namely, intensive shearing under high pressure inside pump.
목차
Abstract
1 Introduction
2 Experimental Program
3 Test Results and Analysis on Changes in Rheological Properties During Pumping
4 Discussion on the Variation in Rheological Properties Due to Pumping
5 Conclusion
References
참고문헌 (36)
참고문헌 신청
Alekseev, S. N. (1952). On the calculation of resistance in pipe of concrete pumps. Mekhanizatia Storitel’stva, 9(1), 8?13.
ASTM C143/C143 M-15a. (2015). Standard test method for slump of hydrauliccement concrete. West Conshohocken: ASTM International.
ASTM C173/C173 M-16. (2016). Standard test method for air content of freshly mixed concrete by the volumetric method. West Conshohocken: ASTM International.
Beitzel H, Beitzel M (2008) Pump application for self-compacting concrete under extreme conditions. SCC2008, Chicago, USA, 2008.
Choi, M. S. (2013). Prediction of concrete pumping performance base on the evaluation of lubrication layer properties (Ph. D Thesis). Korea Advanced Institute of Science and Technology, South Korea.
ASTM C143/C143 M-15a. (2015). Standard test method for slump of hydrauliccement concrete. West Conshohocken: ASTM International.
ASTM C173/C173 M-16. (2016). Standard test method for air content of freshly mixed concrete by the volumetric method. West Conshohocken: ASTM International.
Beitzel H, Beitzel M (2008) Pump application for self-compacting concrete under extreme conditions. SCC2008, Chicago, USA, 2008.
Choi, M. S. (2013). Prediction of concrete pumping performance base on the evaluation of lubrication layer properties (Ph. D Thesis). Korea Advanced Institute of Science and Technology, South Korea.
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