62. Theoretical and practical investigations on SCC formwork

Title: 62. Theoretical and practical investigations on SCC formwork
Author(s): F. van Waarde, E.A.B. Koenders, J.A. Lycklama à Nijeholt, J.C. Walraven
Paper category : conference
Book title: 5th International RILEM Symposium on Self-Compacting Concrete
Editor(s): G. De Schutter and V. Boel
Print-ISBN: 978-2-35158-047-9
e-ISBN: 978-2-35158-088-2
Publisher: RILEM Publications SARL
Publication year: 2007
Pages: 417 - 422
Total Pages: 6
Nb references: 6
Language: English

Abstract: Pressure forces that act on a formwork during casting of a SCC element are still subject of discussion among contractors and structural engineers. The differences in rheological behaviour between SCC and ordinary concrete turns out to be sufficient to mobilize different (hydrostatic) pressure forces. The consequence of this is that formwork, which is designed for ordinary concrete, does not satisfy when using SCC. This issue is the main subject of a research project [1] currently running at Delft University of Technology in corporation with NRG and BAM/DMC. With this project it is tried to uncover the theoretical as well as the practical issues of formwork used for SCC elements. With the software FLUENT1, numerical simulations are conducted for a Funnel test and a full-scale wall. Experimental verification data is achieved from tests (BLM-viscometer and Rheolab MC1) conducted at the Stevin II lab of Delft University of Technology. From the numerical simulations and laboratory research, the pressure development of SCC during casting is examined. Results are compared with experimental data achieved from site measurements.
In the paper, an overview of the numerical and experimental results achieved from this research project will be provided. Emphasis will be on the formwork pressure as well as on the flow behaviour of SCC during casting.

Online publication: 2009-06-16
Publication type : full_text
Public price (Euros): 0.00