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Pumping behaviour of modern concrete – characterisation and prediction

Author(s): Egor Secrieru and Viktor Mechtcherine
Paper category: Proceedings
Book title:4th International Symposium on Design, Performance and Use of Self-Consolidating Concrete
Editor(s): Caijun Shi & Zuhua Zhang, Hunan University, China
Kamal Henri Khayat, Hunan University, China
Missouri University of Science & Technology, USA
Publisher: RILEM Publications SARL
Publication year:2018
Total Pages:10
Language : English

Abstract: The nature of concrete both in fresh and hardened states is perpetually changing, conditioned by new engineering and environmental requirements, e. g., from the perspective of their durability and sustainability. Analogously, the approaches for the assessment of fresh
concrete workability in general and its pumpability in particular, have to be updated as well. Indeed, full-scale pumping tests cannot always be performed for any construction project to ensure the suitability of the material properties. Instead, it is desired to proceed with a series
of simple experiments for example on one representative bucket of concrete from the whole batch as to reliably predict whether the concrete is pumpable or not. The primary objective of the research at hand is to assess the concrete pumpability applying existing rheological tools and validate the results of full-scale pumping experiments. The pressure-flow rate curves serve as a key pumpability indicator for the comparison between the predicted results from combined viscometer/tribometer scientific method, Sliper, pressure performance nomogram and the actual results from full-scale pumping. The proposed methodology shall promote the understanding of complex phenomena occurring in different types of concrete during pumping and reliably predict their behaviour concerning pumpability.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00

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