Ultrasound through-transmission techniques for quality control of fresh concrete

Title: Ultrasound through-transmission techniques for quality control of fresh concrete
Author(s): C.U. Grosse
Paper category : conference
Book title: RILEM Symposium on On Site Assessment of Concrete, Masonry and Timber Structures - SACoMaTiS 2008
Editor(s): L. Binda, M. di Prisco, R. Felicetti
Print-ISBN: 978-2-35158-061-5
e-ISBN: 978-2-35158-075-2
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 89 - 98
Total Pages: 10
Nb references: 18
Language: English

Abstract: Ultrasound analysis techniques are applied based on the FreshCon equipment to investigate the setting and hardening behaviour of cementitious materials. The implemented data analysis techniques are applied using the whole waveform representing material properties. Parameters that could be extracted out of the signals are the velocity, the energy and the frequency content. Recently, the ability to record the temperature evolution over time was introduced as well as the determination of the associated hydration heat. For a rapid first interpretation of material properties the determination of the initial and final setting time was implemented. Comparing the graphs of different material compositions differences in quality as well as of the workability can be found easily.
The method can also be used to investigate the water-to-cement-ratio, the type of cement or the effect of additives as retarders or accelerators. Some application examples are the development of admixtures and the in-situ quality control during slip form concreting or precasting.

Online publication: 2009-05-26
Publication type : full_text
Public price (Euros): 0.00