36. In-situ on-line control of SCC production regularity

Title: 36. In-situ on-line control of SCC production regularity
Author(s): E. Brunquet, B. Cazacliu
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: 251 - 257
Total Pages: 7
Nb references: 7
Language: English

Abstract: A new force sensor Viscoprobe in a mixer is tested and compared with Wattmeter - mixing power measurement - and concrete moisture probe Orbiter also in the same mixer of an industrial batching plant, over 11 SCC truck mixer productions. The Viscoprobe(TM) measures water proportioning variations batch per batch with ±1,2 L/m3 accuracy. The comparison of the 3 sensors signals leads to the improvement of each measurement accuracy through a better understanding of physical product evolution while mixing. With new processing of wattmeter and Orbiter measurements, accuracies are estimated ±2.5 L/m3.
Should data be processed as in previous studies, accuracies are about ±4.5 L/m3 . The measurement field of validity is different for each sensor and combined use is recommended (example Viscoprobe and wattmeter).
The combined use of several sensors and new processing methods improve the previously assumed accuracies and make measurement reliable. Once these tools, available from now on, are operating, online quality control and then close-loop control inside the mixer of production to the quality can be considered in the short term.

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